mirror of
https://github.com/curioustorvald/tsvm.git
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3270 lines
135 KiB
C
3270 lines
135 KiB
C
// Created by CuriousTorvald and Claude on 2025-11-03.
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// TAV Decoder - Converts TAV video to FFV1 format with TAD audio to PCMu8
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// Based on TSVM decoder implementation (GraphicsJSR223Delegate.kt + playtav.js)
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// Only supports features available in TSVM decoder (no MC-EZBC, no MPEG-style motion compensation)
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <math.h>
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#include <zstd.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <getopt.h>
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#include <signal.h>
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#include "decoder_tad.h" // Shared TAD decoder library
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#define DECODER_VENDOR_STRING "Decoder-TAV 20251103 (ffv1+pcmu8)"
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// TAV format constants
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#define TAV_MAGIC "\x1F\x54\x53\x56\x4D\x54\x41\x56"
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#define TAV_MODE_SKIP 0x00
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#define TAV_MODE_INTRA 0x01
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#define TAV_MODE_DELTA 0x02
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// TAV packet types (only those supported by TSVM decoder)
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#define TAV_PACKET_IFRAME 0x10 // Intra frame (keyframe) - SUPPORTED
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#define TAV_PACKET_PFRAME 0x11 // Predicted frame - SUPPORTED (delta mode)
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#define TAV_PACKET_GOP_UNIFIED 0x12 // Unified 3D DWT GOP - SUPPORTED
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#define TAV_PACKET_AUDIO_MP2 0x20 // MP2 audio - SUPPORTED (passthrough)
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#define TAV_PACKET_AUDIO_PCM8 0x21 // 8-bit PCM audio - SUPPORTED
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#define TAV_PACKET_AUDIO_TAD 0x24 // TAD audio - SUPPORTED (decode to PCMu8)
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#define TAV_PACKET_AUDIO_TRACK 0x40 // Bundled audio track - SUPPORTED (passthrough)
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#define TAV_PACKET_SUBTITLE 0x30 // Subtitle - SKIPPED
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#define TAV_PACKET_EXTENDED_HDR 0xEF // Extended header - SKIPPED
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#define TAV_PACKET_GOP_SYNC 0xFC // GOP sync packet - SKIPPED
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#define TAV_PACKET_TIMECODE 0xFD // Timecode - SKIPPED
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#define TAV_PACKET_SYNC_NTSC 0xFE // NTSC sync - SKIPPED
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#define TAV_PACKET_SYNC 0xFF // Sync - SKIPPED
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// Unsupported packet types (not in TSVM decoder)
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#define TAV_PACKET_PFRAME_RESIDUAL 0x14 // P-frame MPEG-style - NOT SUPPORTED
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#define TAV_PACKET_BFRAME_RESIDUAL 0x15 // B-frame MPEG-style - NOT SUPPORTED
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// Channel layout definitions
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#define CHANNEL_LAYOUT_YCOCG 0 // Y-Co-Cg/I-Ct-Cp
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#define CHANNEL_LAYOUT_YCOCG_A 1 // Y-Co-Cg-A/I-Ct-Cp-A
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#define CHANNEL_LAYOUT_Y_ONLY 2 // Y/I only
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#define CHANNEL_LAYOUT_Y_A 3 // Y-A/I-A
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#define CHANNEL_LAYOUT_COCG 4 // Co-Cg/Ct-Cp
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#define CHANNEL_LAYOUT_COCG_A 5 // Co-Cg-A/Ct-Cp-A
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// Wavelet filter types
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#define WAVELET_5_3_REVERSIBLE 0
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#define WAVELET_9_7_IRREVERSIBLE 1
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#define WAVELET_BIORTHOGONAL_13_7 2
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#define WAVELET_DD4 16
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#define WAVELET_HAAR 255
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// Tile sizes (match TSVM)
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#define TILE_SIZE_X 640
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#define TILE_SIZE_Y 540
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#define DWT_FILTER_HALF_SUPPORT 4
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#define TILE_MARGIN_LEVELS 3
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#define TILE_MARGIN (DWT_FILTER_HALF_SUPPORT * (1 << TILE_MARGIN_LEVELS))
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#define PADDED_TILE_SIZE_X (TILE_SIZE_X + 2 * TILE_MARGIN)
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#define PADDED_TILE_SIZE_Y (TILE_SIZE_Y + 2 * TILE_MARGIN)
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static inline int CLAMP(int x, int min, int max) {
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return x < min ? min : (x > max ? max : x);
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}
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//=============================================================================
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// TAV Header Structure (32 bytes)
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//=============================================================================
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typedef struct {
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uint8_t magic[8];
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uint8_t version;
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uint16_t width;
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uint16_t height;
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uint8_t fps;
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uint32_t total_frames;
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uint8_t wavelet_filter;
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uint8_t decomp_levels;
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uint8_t quantiser_y;
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uint8_t quantiser_co;
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uint8_t quantiser_cg;
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uint8_t extra_flags;
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uint8_t video_flags;
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uint8_t encoder_quality;
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uint8_t channel_layout;
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uint8_t entropy_coder;
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uint8_t reserved[2];
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uint8_t device_orientation;
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uint8_t file_role;
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} __attribute__((packed)) tav_header_t;
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//=============================================================================
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// Quantisation Lookup Table (matches TSVM exactly)
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//=============================================================================
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static const int QLUT[] = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,132,136,140,144,148,152,156,160,164,168,172,176,180,184,188,192,196,200,204,208,212,216,220,224,228,232,236,240,244,248,252,256,264,272,280,288,296,304,312,320,328,336,344,352,360,368,376,384,392,400,408,416,424,432,440,448,456,464,472,480,488,496,504,512,528,544,560,576,592,608,624,640,656,672,688,704,720,736,752,768,784,800,816,832,848,864,880,896,912,928,944,960,976,992,1008,1024,1056,1088,1120,1152,1184,1216,1248,1280,1312,1344,1376,1408,1440,1472,1504,1536,1568,1600,1632,1664,1696,1728,1760,1792,1824,1856,1888,1920,1952,1984,2016,2048,2112,2176,2240,2304,2368,2432,2496,2560,2624,2688,2752,2816,2880,2944,3008,3072,3136,3200,3264,3328,3392,3456,3520,3584,3648,3712,3776,3840,3904,3968,4032,4096};
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// Perceptual quantisation constants (match TSVM)
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static const float ANISOTROPY_MULT[] = {2.0f, 1.8f, 1.6f, 1.4f, 1.2f, 1.0f};
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static const float ANISOTROPY_BIAS[] = {0.4f, 0.2f, 0.1f, 0.0f, 0.0f, 0.0f};
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static const float ANISOTROPY_MULT_CHROMA[] = {6.6f, 5.5f, 4.4f, 3.3f, 2.2f, 1.1f};
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static const float ANISOTROPY_BIAS_CHROMA[] = {1.0f, 0.8f, 0.6f, 0.4f, 0.2f, 0.0f};
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static const float FOUR_PIXEL_DETAILER = 0.88f;
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static const float TWO_PIXEL_DETAILER = 0.92f;
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//=============================================================================
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// DWT Subband Layout Calculation (matches TSVM)
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//=============================================================================
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typedef struct {
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int level; // Decomposition level (1 to decompLevels)
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int subband_type; // 0=LL, 1=LH, 2=HL, 3=HH
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int coeff_start; // Starting index in linear coefficient array
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int coeff_count; // Number of coefficients in this subband
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} dwt_subband_info_t;
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static int calculate_subband_layout(int width, int height, int decomp_levels, dwt_subband_info_t *subbands) {
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int subband_count = 0;
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// generate division series
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int widths[decomp_levels + 1]; widths[0] = width;
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int heights[decomp_levels + 1]; heights[0] = height;
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for (int i = 1; i < decomp_levels + 1; i++) {
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widths[i] = (int)roundf(widths[i - 1] / 2.0f);
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heights[i] = (int)roundf(heights[i - 1] / 2.0f);
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}
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// LL subband at maximum decomposition level
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int ll_width = widths[decomp_levels];
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int ll_height = heights[decomp_levels];
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subbands[subband_count++] = (dwt_subband_info_t){decomp_levels, 0, 0, ll_width * ll_height};
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int coeff_offset = ll_width * ll_height;
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// LH, HL, HH subbands for each level from max down to 1
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for (int level = decomp_levels; level >= 1; level--) {
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int level_width = widths[decomp_levels - level + 1];
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int level_height = heights[decomp_levels - level + 1];
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const int subband_size = level_width * level_height;
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// LH subband
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subbands[subband_count++] = (dwt_subband_info_t){level, 1, coeff_offset, subband_size};
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coeff_offset += subband_size;
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// HL subband
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subbands[subband_count++] = (dwt_subband_info_t){level, 2, coeff_offset, subband_size};
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coeff_offset += subband_size;
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// HH subband
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subbands[subband_count++] = (dwt_subband_info_t){level, 3, coeff_offset, subband_size};
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coeff_offset += subband_size;
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}
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return subband_count;
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}
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//=============================================================================
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// Perceptual Quantisation Model (matches TSVM exactly)
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//=============================================================================
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static int tav_derive_encoder_qindex(int q_index, int q_y_global) {
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if (q_index > 0) return q_index - 1;
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if (q_y_global >= 60) return 0;
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else if (q_y_global >= 42) return 1;
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else if (q_y_global >= 25) return 2;
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else if (q_y_global >= 12) return 3;
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else if (q_y_global >= 6) return 4;
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else if (q_y_global >= 2) return 5;
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else return 5;
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}
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static float perceptual_model3_LH(float level) {
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const float H4 = 1.2f;
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const float K = 2.0f; // CRITICAL: Fixed value for fixed curve; quantiser will scale it up anyway
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const float K12 = K * 12.0f;
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const float x = level;
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const float Lx = H4 - ((K + 1.0f) / 15.0f) * (x - 4.0f);
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const float C3 = -1.0f / 45.0f * (K12 + 92.0f);
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const float G3x = (-x / 180.0f) * (K12 + 5.0f * x * x - 60.0f * x + 252.0f) - C3 + H4;
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return (level >= 4.0f) ? Lx : G3x;
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}
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static float perceptual_model3_HL(int quality, float LH) {
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return LH * ANISOTROPY_MULT[quality] + ANISOTROPY_BIAS[quality];
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}
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static float lerp(float x, float y, float a) {
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return x * (1.0f - a) + y * a;
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}
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static float perceptual_model3_HH(float LH, float HL, float level) {
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const float Kx = (sqrtf(level) - 1.0f) * 0.5f + 0.5f;
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return lerp(LH, HL, Kx);
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}
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static float perceptual_model3_LL(float level) {
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const float n = perceptual_model3_LH(level);
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const float m = perceptual_model3_LH(level - 1.0f) / n;
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return n / m;
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}
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static float perceptual_model3_chroma_basecurve(int quality, float level) {
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return 1.0f - (1.0f / (0.5f * quality * quality + 1.0f)) * (level - 4.0f);
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}
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static float get_perceptual_weight(int q_index, int q_y_global, int level0, int subband_type,
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int is_chroma, int max_levels) {
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// Convert to perceptual level (1-6 scale)
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const float level = 1.0f + ((level0 - 1.0f) / (max_levels - 1.0f)) * 5.0f;
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const int quality_level = tav_derive_encoder_qindex(q_index, q_y_global);
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if (!is_chroma) {
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// LUMA CHANNEL
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if (subband_type == 0) {
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return perceptual_model3_LL(level);
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}
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const float LH = perceptual_model3_LH(level);
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if (subband_type == 1) {
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return LH;
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}
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const float HL = perceptual_model3_HL(quality_level, LH);
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if (subband_type == 2) {
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float detailer = 1.0f;
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if (level >= 1.8f && level <= 2.2f) detailer = TWO_PIXEL_DETAILER;
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else if (level >= 2.8f && level <= 3.2f) detailer = FOUR_PIXEL_DETAILER;
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return HL * detailer;
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} else {
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// HH subband
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float detailer = 1.0f;
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if (level >= 1.8f && level <= 2.2f) detailer = TWO_PIXEL_DETAILER;
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else if (level >= 2.8f && level <= 3.2f) detailer = FOUR_PIXEL_DETAILER;
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return perceptual_model3_HH(LH, HL, level) * detailer;
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}
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} else {
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// CHROMA CHANNELS
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const float base = perceptual_model3_chroma_basecurve(quality_level, level - 1);
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if (subband_type == 0) {
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return 1.0f;
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} else if (subband_type == 1) {
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return fmaxf(base, 1.0f);
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} else if (subband_type == 2) {
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return fmaxf(base * ANISOTROPY_MULT_CHROMA[quality_level], 1.0f);
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} else {
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return fmaxf(base * ANISOTROPY_MULT_CHROMA[quality_level] + ANISOTROPY_BIAS_CHROMA[quality_level], 1.0f);
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}
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}
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}
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static void dequantise_dwt_subbands_perceptual(int q_index, int q_y_global, const int16_t *quantised,
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float *dequantised, int width, int height, int decomp_levels,
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float base_quantiser, int is_chroma, int frame_num) {
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dwt_subband_info_t subbands[32]; // Max possible subbands
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const int subband_count = calculate_subband_layout(width, height, decomp_levels, subbands);
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const int coeff_count = width * height;
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memset(dequantised, 0, coeff_count * sizeof(float));
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int is_debug = 0;//(frame_num == 32);
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// if (frame_num == 32) {
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// fprintf(stderr, "DEBUG: dequantise called for frame %d, is_chroma=%d\n", frame_num, is_chroma);
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// }
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// Apply perceptual weighting to each subband
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for (int s = 0; s < subband_count; s++) {
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const dwt_subband_info_t *subband = &subbands[s];
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const float weight = get_perceptual_weight(q_index, q_y_global, subband->level,
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subband->subband_type, is_chroma, decomp_levels);
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const float effective_quantiser = base_quantiser * weight;
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if (is_debug && !is_chroma) {
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if (subband->subband_type == 0) { // LL band
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fprintf(stderr, " Subband level %d (LL): weight=%.6f, base_q=%.1f, effective_q=%.1f, count=%d\n",
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subband->level, weight, base_quantiser, effective_quantiser, subband->coeff_count);
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// Print first 5 quantised LL coefficients
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fprintf(stderr, " First 5 quantised LL: ");
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for (int k = 0; k < 5 && k < subband->coeff_count; k++) {
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int idx = subband->coeff_start + k;
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fprintf(stderr, "%d ", quantised[idx]);
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}
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fprintf(stderr, "\n");
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// Find max quantised LL coefficient
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int max_quant_ll = 0;
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for (int k = 0; k < subband->coeff_count; k++) {
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int idx = subband->coeff_start + k;
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int abs_val = quantised[idx] < 0 ? -quantised[idx] : quantised[idx];
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if (abs_val > max_quant_ll) max_quant_ll = abs_val;
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}
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fprintf(stderr, " Max quantised LL coefficient: %d (dequantises to %.1f)\n",
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max_quant_ll, max_quant_ll * effective_quantiser);
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}
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}
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for (int i = 0; i < subband->coeff_count; i++) {
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const int idx = subband->coeff_start + i;
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if (idx < coeff_count) {
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// CRITICAL: Must ROUND to match EZBC encoder's roundf() behavior
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// Without rounding, truncation limits brightness range (e.g., Y maxes at 227 instead of 255)
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const float untruncated = quantised[idx] * effective_quantiser;
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dequantised[idx] = roundf(untruncated);
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}
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}
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}
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// Debug: Verify LL band was dequantised correctly
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if (is_debug && !is_chroma) {
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// Find LL band again to verify
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for (int s = 0; s < subband_count; s++) {
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const dwt_subband_info_t *subband = &subbands[s];
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if (subband->level == decomp_levels && subband->subband_type == 0) {
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fprintf(stderr, " AFTER all subbands processed - First 5 dequantised LL: ");
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for (int k = 0; k < 5 && k < subband->coeff_count; k++) {
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int idx = subband->coeff_start + k;
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fprintf(stderr, "%.1f ", dequantised[idx]);
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}
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fprintf(stderr, "\n");
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// Find max dequantised LL
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float max_dequant_ll = -999.0f;
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for (int k = 0; k < subband->coeff_count; k++) {
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int idx = subband->coeff_start + k;
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float abs_val = dequantised[idx] < 0 ? -dequantised[idx] : dequantised[idx];
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if (abs_val > max_dequant_ll) max_dequant_ll = abs_val;
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}
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fprintf(stderr, " AFTER all subbands - Max dequantised LL: %.1f\n", max_dequant_ll);
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break;
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}
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}
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}
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}
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//=============================================================================
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// Grain Synthesis Removal (matches TSVM exactly)
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//=============================================================================
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// Deterministic RNG for grain synthesis (matches encoder)
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static inline uint32_t tav_grain_synthesis_rng(uint32_t frame, uint32_t band, uint32_t x, uint32_t y) {
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uint32_t key = frame * 0x9e3779b9u ^ band * 0x7f4a7c15u ^ (y << 16) ^ x;
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// rng_hash implementation
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uint32_t hash = key;
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hash = hash ^ (hash >> 16);
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hash = hash * 0x7feb352du;
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hash = hash ^ (hash >> 15);
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hash = hash * 0x846ca68bu;
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hash = hash ^ (hash >> 16);
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return hash;
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}
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// Generate triangular noise from uint32 RNG (returns value in range [-1.0, 1.0])
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static inline float tav_grain_triangular_noise(uint32_t rng_val) {
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// Get two uniform random values in [0, 1]
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float u1 = (rng_val & 0xFFFFu) / 65535.0f;
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float u2 = ((rng_val >> 16) & 0xFFFFu) / 65535.0f;
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// Convert to range [-1, 1] and average for triangular distribution
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return (u1 + u2) - 1.0f;
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}
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// Remove grain synthesis from DWT coefficients (decoder subtracts noise)
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// This must be called AFTER dequantisation but BEFORE inverse DWT
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static void remove_grain_synthesis_decoder(float *coeffs, int width, int height,
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int decomp_levels, int frame_num, int q_y_global) {
|
||
dwt_subband_info_t subbands[32];
|
||
const int subband_count = calculate_subband_layout(width, height, decomp_levels, subbands);
|
||
|
||
// Noise amplitude (matches Kotlin: qYGlobal.coerceAtMost(32) * 0.8f)
|
||
// FIX: Was 0.25f, should be 0.8f to match Kotlin decoder
|
||
const float noise_amplitude = (q_y_global < 32 ? q_y_global : 32) * 0.8f;
|
||
|
||
// Process each subband (skip LL band which is level 0)
|
||
for (int s = 0; s < subband_count; s++) {
|
||
const dwt_subband_info_t *subband = &subbands[s];
|
||
if (subband->level == 0) continue; // Skip LL band
|
||
|
||
// Calculate band index for RNG (matches Kotlin: level + subbandType * 31 + 16777619)
|
||
uint32_t band = subband->level + subband->subband_type * 31 + 16777619;
|
||
|
||
// Remove noise from each coefficient in this subband
|
||
for (int i = 0; i < subband->coeff_count; i++) {
|
||
const int idx = subband->coeff_start + i;
|
||
if (idx < width * height) {
|
||
// Calculate 2D position from linear index
|
||
int y = idx / width;
|
||
int x = idx % width;
|
||
|
||
// Generate same deterministic noise as encoder
|
||
uint32_t rng_val = tav_grain_synthesis_rng(frame_num, band, x, y);
|
||
float noise = tav_grain_triangular_noise(rng_val);
|
||
|
||
// Subtract noise from coefficient
|
||
coeffs[idx] -= noise * noise_amplitude;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
//=============================================================================
|
||
static int calculate_dwt_levels(int chunk_size) {
|
||
/*if (chunk_size < TAD_MIN_CHUNK_SIZE) {
|
||
fprintf(stderr, "Error: Chunk size %d is below minimum %d\n", chunk_size, TAD_MIN_CHUNK_SIZE);
|
||
return -1;
|
||
}
|
||
|
||
// Calculate levels: log2(chunk_size) - 1
|
||
int levels = 0;
|
||
int size = chunk_size;
|
||
while (size > 1) {
|
||
size >>= 1;
|
||
levels++;
|
||
}
|
||
return levels - 2;*/
|
||
return 9;
|
||
}
|
||
|
||
//=============================================================================
|
||
// Haar DWT Implementation (inverse only needed for decoder)
|
||
//=============================================================================
|
||
|
||
// Forward declaration (defined later in TAV decoder section)
|
||
static void dwt_97_inverse_1d(float *data, int length);
|
||
|
||
static void dwt_inverse_multilevel(float *data, int length, int levels) {
|
||
// generate division series
|
||
// Forward uses: data[0..length-1], then data[0..(length+1)/2-1], etc.
|
||
int *lengths = malloc((levels + 1) * sizeof(int));
|
||
lengths[0] = length;
|
||
for (int i = 1; i <= levels; i++) {
|
||
lengths[i] = (lengths[i - 1] + 1) / 2;
|
||
}
|
||
|
||
// Inverse transform: apply inverse DWT using exact forward lengths in reverse order
|
||
// Forward applied DWT with lengths: [length, (length+1)/2, ((length+1)/2+1)/2, ...]
|
||
// Inverse must use same lengths in reverse: [..., ((length+1)/2+1)/2, (length+1)/2, length]
|
||
for (int level = levels - 1; level >= 0; level--) {
|
||
int current_length = lengths[level];
|
||
// dwt_haar_inverse_1d(data, current_length); // THEN apply inverse
|
||
// dwt_dd4_inverse_1d(data, current_length); // THEN apply inverse
|
||
dwt_97_inverse_1d(data, current_length); // THEN apply inverse
|
||
}
|
||
|
||
free(lengths);
|
||
}
|
||
|
||
//=============================================================================
|
||
// Helper Functions for TAD Decoder
|
||
//=============================================================================
|
||
|
||
static inline float FCLAMP(float x, float min, float max) {
|
||
return x < min ? min : (x > max ? max : x);
|
||
}
|
||
|
||
//=============================================================================
|
||
// M/S Stereo Correlation (inverse of decorrelation)
|
||
//=============================================================================
|
||
|
||
// Uniform random in [0, 1)
|
||
static inline float frand01(void) {
|
||
return (float)rand() / ((float)RAND_MAX + 1.0f);
|
||
}
|
||
|
||
// TPDF noise in [-1, +1)
|
||
static inline float tpdf1(void) {
|
||
return (frand01() - frand01());
|
||
}
|
||
|
||
static void ms_correlate(const float *mid, const float *side, float *left, float *right, size_t count) {
|
||
for (size_t i = 0; i < count; i++) {
|
||
// Decode M/S → L/R
|
||
float m = mid[i];
|
||
float s = side[i];
|
||
left[i] = FCLAMP((m + s), -1.0f, 1.0f);
|
||
right[i] = FCLAMP((m - s), -1.0f, 1.0f);
|
||
}
|
||
}
|
||
|
||
static float signum(float x) {
|
||
if (x > 0.0f) return 1.0f;
|
||
if (x < 0.0f) return -1.0f;
|
||
return 0.0f;
|
||
}
|
||
|
||
static void expand_gamma(float *left, float *right, size_t count) {
|
||
for (size_t i = 0; i < count; i++) {
|
||
// decode(y) = sign(y) * |y|^(1/γ) where γ=0.5
|
||
float x = left[i]; float a = fabsf(x);
|
||
left[i] = signum(x) * powf(a, 1.4142f);
|
||
float y = right[i]; float b = fabsf(y);
|
||
right[i] = signum(y) * powf(b, 1.4142f);
|
||
}
|
||
}
|
||
|
||
static void expand_mu_law(float *left, float *right, size_t count) {
|
||
static float MU = 255.0f;
|
||
|
||
for (size_t i = 0; i < count; i++) {
|
||
// decode(y) = sign(y) * |y|^(1/γ) where γ=0.5
|
||
float x = left[i];
|
||
left[i] = signum(x) * (powf(1.0f + MU, fabsf(x)) - 1.0f) / MU;
|
||
float y = right[i];
|
||
right[i] = signum(y) * (powf(1.0f + MU, fabsf(y)) - 1.0f) / MU;
|
||
}
|
||
}
|
||
|
||
//=============================================================================
|
||
// De-emphasis Filter (TAD)
|
||
//=============================================================================
|
||
|
||
static void calculate_deemphasis_coeffs(float *b0, float *b1, float *a1) {
|
||
// De-emphasis factor (must match encoder pre-emphasis alpha=0.5)
|
||
const float alpha = 0.5f;
|
||
|
||
*b0 = 1.0f;
|
||
*b1 = 0.0f; // No feedforward delay
|
||
*a1 = -alpha; // NEGATIVE because equation has minus sign: y = x - a1*prev_y
|
||
}
|
||
|
||
static void apply_deemphasis(float *left, float *right, size_t count) {
|
||
// Static state variables - persistent across chunks to prevent discontinuities
|
||
static float prev_x_l = 0.0f;
|
||
static float prev_y_l = 0.0f;
|
||
static float prev_x_r = 0.0f;
|
||
static float prev_y_r = 0.0f;
|
||
|
||
float b0, b1, a1;
|
||
calculate_deemphasis_coeffs(&b0, &b1, &a1);
|
||
|
||
// Left channel - use persistent state
|
||
for (size_t i = 0; i < count; i++) {
|
||
float x = left[i];
|
||
float y = b0 * x + b1 * prev_x_l - a1 * prev_y_l;
|
||
left[i] = y;
|
||
prev_x_l = x;
|
||
prev_y_l = y;
|
||
}
|
||
|
||
// Right channel - use persistent state
|
||
for (size_t i = 0; i < count; i++) {
|
||
float x = right[i];
|
||
float y = b0 * x + b1 * prev_x_r - a1 * prev_y_r;
|
||
right[i] = y;
|
||
prev_x_r = x;
|
||
prev_y_r = y;
|
||
}
|
||
}
|
||
|
||
static void pcm32f_to_pcm8(const float *fleft, const float *fright, uint8_t *left, uint8_t *right, size_t count, float dither_error[2][2]) {
|
||
const float b1 = 1.5f; // 1st feedback coefficient
|
||
const float b2 = -0.75f; // 2nd feedback coefficient
|
||
const float scale = 127.5f;
|
||
const float bias = 128.0f;
|
||
|
||
// Reduced dither amplitude to coordinate with coefficient-domain dithering
|
||
// The decoder now adds TPDF dither in coefficient domain, so we reduce
|
||
// sample-domain dither by ~60% to avoid doubling the noise floor
|
||
const float dither_scale = 0.2f; // Reduced from 0.5 (was ±0.5 LSB, now ±0.2 LSB)
|
||
|
||
for (size_t i = 0; i < count; i++) {
|
||
// --- LEFT channel ---
|
||
float feedbackL = b1 * dither_error[0][0] + b2 * dither_error[0][1];
|
||
float ditherL = dither_scale * tpdf1(); // Reduced TPDF dither
|
||
float shapedL = fleft[i] + feedbackL + ditherL / scale;
|
||
shapedL = FCLAMP(shapedL, -1.0f, 1.0f);
|
||
|
||
int qL = (int)lrintf(shapedL * scale);
|
||
if (qL < -128) qL = -128;
|
||
else if (qL > 127) qL = 127;
|
||
left[i] = (uint8_t)(qL + bias);
|
||
|
||
float qerrL = shapedL - (float)qL / scale;
|
||
dither_error[0][1] = dither_error[0][0]; // shift history
|
||
dither_error[0][0] = qerrL;
|
||
|
||
// --- RIGHT channel ---
|
||
float feedbackR = b1 * dither_error[1][0] + b2 * dither_error[1][1];
|
||
float ditherR = dither_scale * tpdf1(); // Reduced TPDF dither
|
||
float shapedR = fright[i] + feedbackR + ditherR / scale;
|
||
shapedR = FCLAMP(shapedR, -1.0f, 1.0f);
|
||
|
||
int qR = (int)lrintf(shapedR * scale);
|
||
if (qR < -128) qR = -128;
|
||
else if (qR > 127) qR = 127;
|
||
right[i] = (uint8_t)(qR + bias);
|
||
|
||
float qerrR = shapedR - (float)qR / scale;
|
||
dither_error[1][1] = dither_error[1][0];
|
||
dither_error[1][0] = qerrR;
|
||
}
|
||
}
|
||
|
||
//=============================================================================
|
||
// TAD (Terrarum Advanced Audio) Decoder - Constants and Helpers
|
||
//=============================================================================
|
||
|
||
// Coefficient scalars for each subband (CDF 9/7 with 9 decomposition levels)
|
||
static const float TAD32_COEFF_SCALARS[] = {64.0f, 45.255f, 32.0f, 22.627f, 16.0f, 11.314f, 8.0f, 5.657f, 4.0f, 2.828f};
|
||
|
||
// Base quantiser weight table (10 subbands: LL + 9 H bands)
|
||
static const float BASE_QUANTISER_WEIGHTS[] = {
|
||
1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.1f, 1.2f, 1.3f, 1.4f, 1.5f
|
||
};
|
||
|
||
//=============================================================================
|
||
// Spectral Interpolation for Coefficient Reconstruction (TAD)
|
||
//=============================================================================
|
||
|
||
// Fast PRNG for light dithering (xorshift32)
|
||
static inline uint32_t xorshift32(uint32_t *s) {
|
||
uint32_t x = *s;
|
||
x ^= x << 13;
|
||
x ^= x >> 17;
|
||
x ^= x << 5;
|
||
return *s = x;
|
||
}
|
||
|
||
static inline float urand(uint32_t *s) {
|
||
return (xorshift32(s) & 0xFFFFFF) / 16777216.0f;
|
||
}
|
||
|
||
static inline float tpdf_tad(uint32_t *s) {
|
||
return urand(s) - urand(s);
|
||
}
|
||
|
||
// Compute RMS energy of a coefficient band
|
||
static float compute_band_rms(const float *c, size_t len) {
|
||
if (len == 0) return 0.0f;
|
||
double sumsq = 0.0;
|
||
for (size_t i = 0; i < len; i++) {
|
||
sumsq += (double)c[i] * c[i];
|
||
}
|
||
return sqrtf((float)(sumsq / (double)len));
|
||
}
|
||
|
||
// Simplified spectral reconstruction for wavelet coefficients
|
||
static void spectral_interpolate_band(float *c, size_t len, float Q, float lower_band_rms) {
|
||
if (len < 4) return;
|
||
|
||
uint32_t seed = 0x9E3779B9u ^ (uint32_t)len ^ (uint32_t)(Q * 65536.0f);
|
||
const float dither_amp = 0.05f * Q;
|
||
|
||
for (size_t i = 0; i < len; i++) {
|
||
c[i] += tpdf_tad(&seed) * dither_amp;
|
||
}
|
||
|
||
(void)lower_band_rms;
|
||
}
|
||
|
||
//=============================================================================
|
||
// Dequantisation (inverse of quantisation)
|
||
//=============================================================================
|
||
|
||
|
||
#define LAMBDA_FIXED 6.0f
|
||
|
||
// Lambda-based decompanding decoder (inverse of Laplacian CDF-based encoder)
|
||
// Converts quantised index back to normalised float in [-1, 1]
|
||
static float lambda_decompanding(int8_t quant_val, int max_index) {
|
||
// Handle zero
|
||
if (quant_val == 0) {
|
||
return 0.0f;
|
||
}
|
||
|
||
int sign = (quant_val < 0) ? -1 : 1;
|
||
int abs_index = abs(quant_val);
|
||
|
||
// Clamp to valid range
|
||
if (abs_index > max_index) abs_index = max_index;
|
||
|
||
// Map index back to normalised CDF [0, 1]
|
||
float normalised_cdf = (float)abs_index / max_index;
|
||
|
||
// Map from [0, 1] back to [0.5, 1.0] (CDF range for positive half)
|
||
float cdf = 0.5f + normalised_cdf * 0.5f;
|
||
|
||
// Inverse Laplacian CDF for x >= 0: x = -(1/λ) * ln(2*(1-F))
|
||
// For F in [0.5, 1.0]: x = -(1/λ) * ln(2*(1-F))
|
||
float abs_val = -(1.0f / LAMBDA_FIXED) * logf(2.0f * (1.0f - cdf));
|
||
|
||
// Clamp to [0, 1]
|
||
if (abs_val > 1.0f) abs_val = 1.0f;
|
||
if (abs_val < 0.0f) abs_val = 0.0f;
|
||
|
||
return sign * abs_val;
|
||
}
|
||
|
||
static void dequantise_dwt_coefficients(const int8_t *quantised, float *coeffs, size_t count, int chunk_size, int dwt_levels, int max_index, float quantiser_scale) {
|
||
|
||
// Calculate sideband boundaries dynamically
|
||
int first_band_size = chunk_size >> dwt_levels;
|
||
|
||
int *sideband_starts = malloc((dwt_levels + 2) * sizeof(int));
|
||
sideband_starts[0] = 0;
|
||
sideband_starts[1] = first_band_size;
|
||
for (int i = 2; i <= dwt_levels + 1; i++) {
|
||
sideband_starts[i] = sideband_starts[i-1] + (first_band_size << (i-2));
|
||
}
|
||
|
||
// Step 1: Dequantise all coefficients (no dithering yet)
|
||
for (size_t i = 0; i < count; i++) {
|
||
int sideband = dwt_levels;
|
||
for (int s = 0; s <= dwt_levels; s++) {
|
||
if (i < sideband_starts[s + 1]) {
|
||
sideband = s;
|
||
break;
|
||
}
|
||
}
|
||
|
||
// Decode using lambda companding
|
||
float normalised_val = lambda_decompanding(quantised[i], max_index);
|
||
|
||
// Denormalise using the subband scalar and apply base weight + quantiser scaling
|
||
float weight = BASE_QUANTISER_WEIGHTS[sideband] * quantiser_scale;
|
||
coeffs[i] = normalised_val * TAD32_COEFF_SCALARS[sideband] * weight;
|
||
}
|
||
|
||
// Step 2: Apply spectral interpolation per band
|
||
// Process bands from high to low frequency (dwt_levels down to 0)
|
||
// so we can use lower bands' RMS for higher band reconstruction
|
||
float prev_band_rms = 0.0f;
|
||
|
||
for (int band = dwt_levels; band >= 0; band--) {
|
||
size_t band_start = sideband_starts[band];
|
||
size_t band_end = sideband_starts[band + 1];
|
||
size_t band_len = band_end - band_start;
|
||
|
||
// Calculate quantisation step Q for this band
|
||
float weight = BASE_QUANTISER_WEIGHTS[band] * quantiser_scale;
|
||
float scalar = TAD32_COEFF_SCALARS[band] * weight;
|
||
float Q = scalar / max_index;
|
||
|
||
// Apply spectral interpolation to this band
|
||
spectral_interpolate_band(&coeffs[band_start], band_len, Q, prev_band_rms);
|
||
|
||
// Compute RMS for this band to use as reference for next (lower frequency) band
|
||
prev_band_rms = compute_band_rms(&coeffs[band_start], band_len);
|
||
}
|
||
|
||
free(sideband_starts);
|
||
}
|
||
|
||
//=============================================================================
|
||
// Chunk Decoding (TAD Audio)
|
||
// NOTE: TAD decoding now uses shared tad32_decode_chunk() from decoder_tad.h
|
||
// This ensures decoder_tav and decoder_tad use identical decoding logic
|
||
//=============================================================================
|
||
// Significance Map Postprocessing (matches TSVM exactly)
|
||
//=============================================================================
|
||
|
||
// Helper: Extract 2-bit code from bit-packed array
|
||
static inline int get_twobit_code(const uint8_t *map_data, int map_bytes, int coeff_idx) {
|
||
int bit_pos = coeff_idx * 2;
|
||
int byte_idx = bit_pos / 8;
|
||
int bit_offset = bit_pos % 8;
|
||
|
||
uint8_t byte0 = map_data[byte_idx];
|
||
int code = (byte0 >> bit_offset) & 0x03;
|
||
|
||
// Handle byte boundary crossing
|
||
if (bit_offset == 7 && byte_idx + 1 < map_bytes) {
|
||
uint8_t byte1 = map_data[byte_idx + 1];
|
||
code = ((byte0 >> 7) & 0x01) | ((byte1 << 1) & 0x02);
|
||
}
|
||
|
||
return code;
|
||
}
|
||
|
||
// Decoder: reconstruct coefficients from 2-bit map format (entropyCoder=0)
|
||
// Layout: [Y_map_2bit][Co_map_2bit][Cg_map_2bit][Y_others][Co_others][Cg_others]
|
||
// 2-bit encoding: 00=0, 01=+1, 10=-1, 11=other (stored in value array)
|
||
static void postprocess_coefficients_twobit(uint8_t *compressed_data, int coeff_count,
|
||
int16_t *output_y, int16_t *output_co, int16_t *output_cg) {
|
||
int map_bytes = (coeff_count * 2 + 7) / 8; // 2 bits per coefficient
|
||
|
||
// (Debug output removed)
|
||
|
||
// Map offsets (all channels present for Y-Co-Cg layout)
|
||
uint8_t *y_map = compressed_data;
|
||
uint8_t *co_map = compressed_data + map_bytes;
|
||
uint8_t *cg_map = compressed_data + map_bytes * 2;
|
||
|
||
// Count "other" values (code 11) for each channel
|
||
int y_others = 0, co_others = 0, cg_others = 0;
|
||
for (int i = 0; i < coeff_count; i++) {
|
||
if (get_twobit_code(y_map, map_bytes, i) == 3) y_others++;
|
||
if (get_twobit_code(co_map, map_bytes, i) == 3) co_others++;
|
||
if (get_twobit_code(cg_map, map_bytes, i) == 3) cg_others++;
|
||
}
|
||
|
||
// (Debug output removed)
|
||
|
||
// Value array offsets (after all maps)
|
||
uint8_t *value_ptr = compressed_data + map_bytes * 3;
|
||
int16_t *y_values = (int16_t *)value_ptr;
|
||
int16_t *co_values = (int16_t *)(value_ptr + y_others * 2);
|
||
int16_t *cg_values = (int16_t *)(value_ptr + y_others * 2 + co_others * 2);
|
||
|
||
// Reconstruct coefficients
|
||
int y_value_idx = 0, co_value_idx = 0, cg_value_idx = 0;
|
||
|
||
for (int i = 0; i < coeff_count; i++) {
|
||
// Y channel
|
||
int y_code = get_twobit_code(y_map, map_bytes, i);
|
||
switch (y_code) {
|
||
case 0: output_y[i] = 0; break;
|
||
case 1: output_y[i] = 1; break;
|
||
case 2: output_y[i] = -1; break;
|
||
case 3: output_y[i] = y_values[y_value_idx++]; break;
|
||
}
|
||
|
||
// Co channel
|
||
int co_code = get_twobit_code(co_map, map_bytes, i);
|
||
switch (co_code) {
|
||
case 0: output_co[i] = 0; break;
|
||
case 1: output_co[i] = 1; break;
|
||
case 2: output_co[i] = -1; break;
|
||
case 3: output_co[i] = co_values[co_value_idx++]; break;
|
||
}
|
||
|
||
// Cg channel
|
||
int cg_code = get_twobit_code(cg_map, map_bytes, i);
|
||
switch (cg_code) {
|
||
case 0: output_cg[i] = 0; break;
|
||
case 1: output_cg[i] = 1; break;
|
||
case 2: output_cg[i] = -1; break;
|
||
case 3: output_cg[i] = cg_values[cg_value_idx++]; break;
|
||
}
|
||
}
|
||
}
|
||
|
||
//=============================================================================
|
||
// EZBC (Embedded Zero Block Coding) Decoder
|
||
//=============================================================================
|
||
|
||
// EZBC Block structure for quadtree
|
||
typedef struct {
|
||
int x, y;
|
||
int width, height;
|
||
} ezbc_block_t;
|
||
|
||
// EZBC bitstream reader state
|
||
typedef struct {
|
||
const uint8_t *data;
|
||
size_t size;
|
||
size_t byte_pos;
|
||
int bit_pos;
|
||
} ezbc_bitreader_t;
|
||
|
||
// Read N bits from EZBC bitstream (LSB-first within each byte)
|
||
static int ezbc_read_bits(ezbc_bitreader_t *reader, int num_bits) {
|
||
int result = 0;
|
||
for (int i = 0; i < num_bits; i++) {
|
||
if (reader->byte_pos >= reader->size) {
|
||
return result; // End of stream
|
||
}
|
||
|
||
const int bit = (reader->data[reader->byte_pos] >> reader->bit_pos) & 1;
|
||
result |= (bit << i);
|
||
|
||
reader->bit_pos++;
|
||
if (reader->bit_pos == 8) {
|
||
reader->bit_pos = 0;
|
||
reader->byte_pos++;
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// EZBC block queues (simple dynamic arrays)
|
||
typedef struct {
|
||
ezbc_block_t *blocks;
|
||
int count;
|
||
int capacity;
|
||
} ezbc_block_queue_t;
|
||
|
||
static void ezbc_queue_init(ezbc_block_queue_t *q) {
|
||
q->capacity = 256;
|
||
q->count = 0;
|
||
q->blocks = malloc(q->capacity * sizeof(ezbc_block_t));
|
||
}
|
||
|
||
static void ezbc_queue_free(ezbc_block_queue_t *q) {
|
||
free(q->blocks);
|
||
q->blocks = NULL;
|
||
q->count = 0;
|
||
}
|
||
|
||
static void ezbc_queue_add(ezbc_block_queue_t *q, ezbc_block_t block) {
|
||
if (q->count >= q->capacity) {
|
||
q->capacity *= 2;
|
||
q->blocks = realloc(q->blocks, q->capacity * sizeof(ezbc_block_t));
|
||
}
|
||
q->blocks[q->count++] = block;
|
||
}
|
||
|
||
// Forward declaration
|
||
static int ezbc_process_significant_block_recursive(
|
||
ezbc_bitreader_t *reader, ezbc_block_t block, int bitplane, int threshold,
|
||
int16_t *output, int width, int8_t *significant, int *first_bitplane,
|
||
ezbc_block_queue_t *next_significant, ezbc_block_queue_t *next_insignificant);
|
||
|
||
// EZBC recursive block decoder (matches Kotlin implementation)
|
||
static int ezbc_process_significant_block_recursive(
|
||
ezbc_bitreader_t *reader, ezbc_block_t block, int bitplane, int threshold,
|
||
int16_t *output, int width, int8_t *significant, int *first_bitplane,
|
||
ezbc_block_queue_t *next_significant, ezbc_block_queue_t *next_insignificant) {
|
||
|
||
int sign_bits_read = 0;
|
||
|
||
// If 1x1 block: read sign bit and add to significant queue
|
||
if (block.width == 1 && block.height == 1) {
|
||
const int idx = block.y * width + block.x;
|
||
const int sign_bit = ezbc_read_bits(reader, 1);
|
||
sign_bits_read++;
|
||
|
||
// Set coefficient to threshold value with sign
|
||
output[idx] = sign_bit ? -threshold : threshold;
|
||
significant[idx] = 1;
|
||
first_bitplane[idx] = bitplane;
|
||
ezbc_queue_add(next_significant, block);
|
||
return sign_bits_read;
|
||
}
|
||
|
||
// Block is > 1x1: subdivide and recursively process children
|
||
int mid_x = block.width / 2;
|
||
int mid_y = block.height / 2;
|
||
if (mid_x == 0) mid_x = 1;
|
||
if (mid_y == 0) mid_y = 1;
|
||
|
||
// Top-left child
|
||
ezbc_block_t tl = {block.x, block.y, mid_x, mid_y};
|
||
const int tl_flag = ezbc_read_bits(reader, 1);
|
||
if (tl_flag) {
|
||
sign_bits_read += ezbc_process_significant_block_recursive(
|
||
reader, tl, bitplane, threshold, output, width, significant, first_bitplane,
|
||
next_significant, next_insignificant);
|
||
} else {
|
||
ezbc_queue_add(next_insignificant, tl);
|
||
}
|
||
|
||
// Top-right child (if exists)
|
||
if (block.width > mid_x) {
|
||
ezbc_block_t tr = {block.x + mid_x, block.y, block.width - mid_x, mid_y};
|
||
const int tr_flag = ezbc_read_bits(reader, 1);
|
||
if (tr_flag) {
|
||
sign_bits_read += ezbc_process_significant_block_recursive(
|
||
reader, tr, bitplane, threshold, output, width, significant, first_bitplane,
|
||
next_significant, next_insignificant);
|
||
} else {
|
||
ezbc_queue_add(next_insignificant, tr);
|
||
}
|
||
}
|
||
|
||
// Bottom-left child (if exists)
|
||
if (block.height > mid_y) {
|
||
ezbc_block_t bl = {block.x, block.y + mid_y, mid_x, block.height - mid_y};
|
||
const int bl_flag = ezbc_read_bits(reader, 1);
|
||
if (bl_flag) {
|
||
sign_bits_read += ezbc_process_significant_block_recursive(
|
||
reader, bl, bitplane, threshold, output, width, significant, first_bitplane,
|
||
next_significant, next_insignificant);
|
||
} else {
|
||
ezbc_queue_add(next_insignificant, bl);
|
||
}
|
||
}
|
||
|
||
// Bottom-right child (if exists)
|
||
if (block.width > mid_x && block.height > mid_y) {
|
||
ezbc_block_t br = {block.x + mid_x, block.y + mid_y, block.width - mid_x, block.height - mid_y};
|
||
const int br_flag = ezbc_read_bits(reader, 1);
|
||
if (br_flag) {
|
||
sign_bits_read += ezbc_process_significant_block_recursive(
|
||
reader, br, bitplane, threshold, output, width, significant, first_bitplane,
|
||
next_significant, next_insignificant);
|
||
} else {
|
||
ezbc_queue_add(next_insignificant, br);
|
||
}
|
||
}
|
||
|
||
return sign_bits_read;
|
||
}
|
||
|
||
// Decode a single channel with EZBC
|
||
static void decode_channel_ezbc(const uint8_t *ezbc_data, size_t offset, size_t size,
|
||
int16_t *output, int expected_count) {
|
||
ezbc_bitreader_t reader = {ezbc_data, offset + size, offset, 0};
|
||
|
||
// Debug: Print first few bytes
|
||
// fprintf(stderr, "[EZBC] Channel decode: offset=%zu, size=%zu, first 5 bytes: %02X %02X %02X %02X %02X\n",
|
||
// offset, size,
|
||
// ezbc_data[offset], ezbc_data[offset+1], ezbc_data[offset+2],
|
||
// ezbc_data[offset+3], ezbc_data[offset+4]);
|
||
|
||
// Read header: MSB bitplane (8 bits), width (16 bits), height (16 bits)
|
||
const int msb_bitplane = ezbc_read_bits(&reader, 8);
|
||
const int width = ezbc_read_bits(&reader, 16);
|
||
const int height = ezbc_read_bits(&reader, 16);
|
||
|
||
// fprintf(stderr, "[EZBC] Decoded header: MSB=%d, width=%d, height=%d (expected pixels=%d)\n",
|
||
// msb_bitplane, width, height, expected_count);
|
||
|
||
if (width * height != expected_count) {
|
||
fprintf(stderr, "EZBC dimension mismatch: %dx%d != %d\n", width, height, expected_count);
|
||
memset(output, 0, expected_count * sizeof(int16_t));
|
||
return;
|
||
}
|
||
|
||
// Initialise output and state tracking
|
||
memset(output, 0, expected_count * sizeof(int16_t));
|
||
int8_t *significant = calloc(expected_count, sizeof(int8_t));
|
||
int *first_bitplane = calloc(expected_count, sizeof(int));
|
||
|
||
// Initialise queues
|
||
ezbc_block_queue_t insignificant, next_insignificant, significant_queue, next_significant;
|
||
ezbc_queue_init(&insignificant);
|
||
ezbc_queue_init(&next_insignificant);
|
||
ezbc_queue_init(&significant_queue);
|
||
ezbc_queue_init(&next_significant);
|
||
|
||
// Start with root block
|
||
ezbc_block_t root = {0, 0, width, height};
|
||
ezbc_queue_add(&insignificant, root);
|
||
|
||
// Process bitplanes from MSB to LSB
|
||
for (int bitplane = msb_bitplane; bitplane >= 0; bitplane--) {
|
||
const int threshold = 1 << bitplane;
|
||
|
||
// Process insignificant blocks
|
||
for (int i = 0; i < insignificant.count; i++) {
|
||
const int flag = ezbc_read_bits(&reader, 1);
|
||
|
||
if (flag == 0) {
|
||
// Still insignificant
|
||
ezbc_queue_add(&next_insignificant, insignificant.blocks[i]);
|
||
} else {
|
||
// Became significant - use recursive processing
|
||
ezbc_process_significant_block_recursive(
|
||
&reader, insignificant.blocks[i], bitplane, threshold,
|
||
output, width, significant, first_bitplane,
|
||
&next_significant, &next_insignificant);
|
||
}
|
||
}
|
||
|
||
// Process significant 1x1 blocks (refinement)
|
||
for (int i = 0; i < significant_queue.count; i++) {
|
||
ezbc_block_t block = significant_queue.blocks[i];
|
||
const int idx = block.y * width + block.x;
|
||
const int refine_bit = ezbc_read_bits(&reader, 1);
|
||
|
||
// Add refinement bit at current bitplane
|
||
if (refine_bit) {
|
||
const int bit_value = 1 << bitplane;
|
||
if (output[idx] < 0) {
|
||
output[idx] -= bit_value;
|
||
} else {
|
||
output[idx] += bit_value;
|
||
}
|
||
}
|
||
|
||
// Keep in significant queue
|
||
ezbc_queue_add(&next_significant, block);
|
||
}
|
||
|
||
// Swap queues
|
||
ezbc_block_queue_t temp_insig = insignificant;
|
||
insignificant = next_insignificant;
|
||
next_insignificant = temp_insig;
|
||
next_insignificant.count = 0;
|
||
|
||
ezbc_block_queue_t temp_sig = significant_queue;
|
||
significant_queue = next_significant;
|
||
next_significant = temp_sig;
|
||
next_significant.count = 0;
|
||
}
|
||
|
||
// Cleanup
|
||
free(significant);
|
||
free(first_bitplane);
|
||
ezbc_queue_free(&insignificant);
|
||
ezbc_queue_free(&next_insignificant);
|
||
ezbc_queue_free(&significant_queue);
|
||
ezbc_queue_free(&next_significant);
|
||
|
||
// Debug: Count non-zero coefficients
|
||
int nonzero_count = 0;
|
||
int16_t max_val = 0, min_val = 0;
|
||
for (int i = 0; i < expected_count; i++) {
|
||
if (output[i] != 0) {
|
||
nonzero_count++;
|
||
if (output[i] > max_val) max_val = output[i];
|
||
if (output[i] < min_val) min_val = output[i];
|
||
}
|
||
}
|
||
// fprintf(stderr, "[EZBC] Decoded %d non-zero coeffs (%.1f%%), range: [%d, %d]\n",
|
||
// nonzero_count, 100.0 * nonzero_count / expected_count, min_val, max_val);
|
||
}
|
||
|
||
// EZBC postprocessing for single frames
|
||
static void postprocess_coefficients_ezbc(uint8_t *compressed_data, int coeff_count,
|
||
int16_t *output_y, int16_t *output_co, int16_t *output_cg,
|
||
int channel_layout) {
|
||
const int has_y = (channel_layout & 0x04) == 0;
|
||
const int has_co = (channel_layout & 0x02) == 0;
|
||
const int has_cg = (channel_layout & 0x02) == 0;
|
||
|
||
int offset = 0;
|
||
|
||
// Decode Y channel
|
||
if (has_y && output_y) {
|
||
const uint32_t size = ((uint32_t)compressed_data[offset + 0]) |
|
||
((uint32_t)compressed_data[offset + 1] << 8) |
|
||
((uint32_t)compressed_data[offset + 2] << 16) |
|
||
((uint32_t)compressed_data[offset + 3] << 24);
|
||
offset += 4;
|
||
decode_channel_ezbc(compressed_data, offset, size, output_y, coeff_count);
|
||
offset += size;
|
||
}
|
||
|
||
// Decode Co channel
|
||
if (has_co && output_co) {
|
||
const uint32_t size = ((uint32_t)compressed_data[offset + 0]) |
|
||
((uint32_t)compressed_data[offset + 1] << 8) |
|
||
((uint32_t)compressed_data[offset + 2] << 16) |
|
||
((uint32_t)compressed_data[offset + 3] << 24);
|
||
offset += 4;
|
||
decode_channel_ezbc(compressed_data, offset, size, output_co, coeff_count);
|
||
offset += size;
|
||
}
|
||
|
||
// Decode Cg channel
|
||
if (has_cg && output_cg) {
|
||
const uint32_t size = ((uint32_t)compressed_data[offset + 0]) |
|
||
((uint32_t)compressed_data[offset + 1] << 8) |
|
||
((uint32_t)compressed_data[offset + 2] << 16) |
|
||
((uint32_t)compressed_data[offset + 3] << 24);
|
||
offset += 4;
|
||
decode_channel_ezbc(compressed_data, offset, size, output_cg, coeff_count);
|
||
offset += size;
|
||
}
|
||
}
|
||
|
||
//=============================================================================
|
||
// DWT Inverse Transforms (matches TSVM)
|
||
//=============================================================================
|
||
|
||
// 9/7 inverse DWT (from TSVM Kotlin code)
|
||
static void dwt_97_inverse_1d(float *data, int length) {
|
||
if (length < 2) return;
|
||
|
||
// Debug: Check if input has non-zero values
|
||
// static int call_count = 0;
|
||
// if (call_count < 5) {
|
||
// Debug: count non-zero coefficients (disabled to reduce stderr output)
|
||
// int nonzero = 0;
|
||
// for (int i = 0; i < length; i++) {
|
||
// if (data[i] != 0.0f) nonzero++;
|
||
// }
|
||
// fprintf(stderr, " dwt_97_inverse_1d call #%d: length=%d, nonzero=%d, first 5: %.1f %.1f %.1f %.1f %.1f\n",
|
||
// call_count, length, nonzero,
|
||
// data[0], length > 1 ? data[1] : 0.0f, length > 2 ? data[2] : 0.0f,
|
||
// length > 3 ? data[3] : 0.0f, length > 4 ? data[4] : 0.0f);
|
||
// call_count++;
|
||
// }
|
||
|
||
float *temp = malloc(length * sizeof(float));
|
||
int half = (length + 1) / 2;
|
||
|
||
// Split into low and high frequency components (matching TSVM layout)
|
||
for (int i = 0; i < half; i++) {
|
||
temp[i] = data[i]; // Low-pass coefficients (first half)
|
||
}
|
||
for (int i = 0; i < length / 2; i++) {
|
||
if (half + i < length) {
|
||
temp[half + i] = data[half + i]; // High-pass coefficients (second half)
|
||
}
|
||
}
|
||
|
||
// 9/7 inverse lifting coefficients from TSVM
|
||
const float alpha = -1.586134342f;
|
||
const float beta = -0.052980118f;
|
||
const float gamma = 0.882911076f;
|
||
const float delta = 0.443506852f;
|
||
const float K = 1.230174105f;
|
||
|
||
// Step 1: Undo scaling
|
||
for (int i = 0; i < half; i++) {
|
||
temp[i] /= K; // Low-pass coefficients
|
||
}
|
||
for (int i = 0; i < length / 2; i++) {
|
||
if (half + i < length) {
|
||
temp[half + i] *= K; // High-pass coefficients
|
||
}
|
||
}
|
||
|
||
// Step 2: Undo δ update
|
||
for (int i = 0; i < half; i++) {
|
||
float d_curr = (half + i < length) ? temp[half + i] : 0.0f;
|
||
float d_prev = (i > 0 && half + i - 1 < length) ? temp[half + i - 1] : d_curr;
|
||
temp[i] -= delta * (d_curr + d_prev);
|
||
}
|
||
|
||
// Step 3: Undo γ predict
|
||
for (int i = 0; i < length / 2; i++) {
|
||
if (half + i < length) {
|
||
float s_curr = temp[i];
|
||
float s_next = (i + 1 < half) ? temp[i + 1] : s_curr;
|
||
temp[half + i] -= gamma * (s_curr + s_next);
|
||
}
|
||
}
|
||
|
||
// Step 4: Undo β update
|
||
for (int i = 0; i < half; i++) {
|
||
float d_curr = (half + i < length) ? temp[half + i] : 0.0f;
|
||
float d_prev = (i > 0 && half + i - 1 < length) ? temp[half + i - 1] : d_curr;
|
||
temp[i] -= beta * (d_curr + d_prev);
|
||
}
|
||
|
||
// Step 5: Undo α predict
|
||
for (int i = 0; i < length / 2; i++) {
|
||
if (half + i < length) {
|
||
float s_curr = temp[i];
|
||
float s_next = (i + 1 < half) ? temp[i + 1] : s_curr;
|
||
temp[half + i] -= alpha * (s_curr + s_next);
|
||
}
|
||
}
|
||
|
||
// Reconstruction - interleave low and high pass
|
||
for (int i = 0; i < length; i++) {
|
||
if (i % 2 == 0) {
|
||
// Even positions: low-pass coefficients
|
||
data[i] = temp[i / 2];
|
||
} else {
|
||
// Odd positions: high-pass coefficients
|
||
int idx = i / 2;
|
||
if (half + idx < length) {
|
||
data[i] = temp[half + idx];
|
||
} else {
|
||
data[i] = 0.0f;
|
||
}
|
||
}
|
||
}
|
||
|
||
// Debug: Check output (disabled to reduce stderr output)
|
||
// if (call_count <= 5) {
|
||
// int nonzero_out = 0;
|
||
// for (int i = 0; i < length; i++) {
|
||
// if (data[i] != 0.0f) nonzero_out++;
|
||
// }
|
||
// fprintf(stderr, " -> OUTPUT: nonzero=%d, first 5: %.1f %.1f %.1f %.1f %.1f\n",
|
||
// nonzero_out,
|
||
// data[0], length > 1 ? data[1] : 0.0f, length > 2 ? data[2] : 0.0f,
|
||
// length > 3 ? data[3] : 0.0f, length > 4 ? data[4] : 0.0f);
|
||
// }
|
||
|
||
free(temp);
|
||
}
|
||
|
||
// 5/3 inverse DWT (simplified - uses 9/7 for now)
|
||
static void dwt_53_inverse_1d(float *data, int length) {
|
||
if (length < 2) return;
|
||
// TODO: Implement proper 5/3 from TSVM if needed
|
||
dwt_97_inverse_1d(data, length);
|
||
}
|
||
|
||
// Multi-level inverse DWT (matches TSVM exactly with correct non-power-of-2 handling)
|
||
static void apply_inverse_dwt_multilevel(float *data, int width, int height, int levels, int filter_type) {
|
||
int max_size = (width > height) ? width : height;
|
||
float *temp_row = malloc(max_size * sizeof(float));
|
||
float *temp_col = malloc(max_size * sizeof(float));
|
||
|
||
// Pre-calculate exact sequence of widths/heights from forward transform
|
||
// This is CRITICAL for non-power-of-2 dimensions (e.g., 560, 448)
|
||
// Forward transform uses: width, (width+1)/2, ((width+1)/2+1)/2, ...
|
||
// Inverse MUST use the exact same sequence in reverse
|
||
int *widths = malloc((levels + 1) * sizeof(int));
|
||
int *heights = malloc((levels + 1) * sizeof(int));
|
||
|
||
widths[0] = width;
|
||
heights[0] = height;
|
||
for (int i = 1; i <= levels; i++) {
|
||
widths[i] = (widths[i - 1] + 1) / 2;
|
||
heights[i] = (heights[i - 1] + 1) / 2;
|
||
}
|
||
|
||
// Debug: Print dimension sequence
|
||
static int debug_once = 1;
|
||
if (debug_once) {
|
||
fprintf(stderr, "DWT dimension sequence for %dx%d with %d levels:\n", width, height, levels);
|
||
for (int i = 0; i <= levels; i++) {
|
||
fprintf(stderr, " Level %d: %dx%d\n", i, widths[i], heights[i]);
|
||
}
|
||
debug_once = 0;
|
||
}
|
||
|
||
// TSVM: for (level in levels - 1 downTo 0)
|
||
// Apply inverse transforms using pre-calculated dimensions
|
||
for (int level = levels - 1; level >= 0; level--) {
|
||
int current_width = widths[level];
|
||
int current_height = heights[level];
|
||
|
||
if (current_width < 1 || current_height < 1) continue;
|
||
if (current_width == 1 && current_height == 1) continue;
|
||
|
||
// TSVM: Column inverse transform first (vertical)
|
||
for (int x = 0; x < current_width; x++) {
|
||
for (int y = 0; y < current_height; y++) {
|
||
temp_col[y] = data[y * width + x];
|
||
}
|
||
|
||
if (filter_type == 0) {
|
||
dwt_53_inverse_1d(temp_col, current_height);
|
||
} else {
|
||
dwt_97_inverse_1d(temp_col, current_height);
|
||
}
|
||
|
||
for (int y = 0; y < current_height; y++) {
|
||
data[y * width + x] = temp_col[y];
|
||
}
|
||
}
|
||
|
||
// TSVM: Row inverse transform second (horizontal)
|
||
for (int y = 0; y < current_height; y++) {
|
||
for (int x = 0; x < current_width; x++) {
|
||
temp_row[x] = data[y * width + x];
|
||
}
|
||
|
||
if (filter_type == 0) {
|
||
dwt_53_inverse_1d(temp_row, current_width);
|
||
} else {
|
||
dwt_97_inverse_1d(temp_row, current_width);
|
||
}
|
||
|
||
for (int x = 0; x < current_width; x++) {
|
||
data[y * width + x] = temp_row[x];
|
||
}
|
||
}
|
||
|
||
// Debug after EVERY level
|
||
static int first_frame_levels = 1;
|
||
if (first_frame_levels && level <= 2) { // Only log levels 2, 1, 0 for first frame
|
||
int nonzero_level = 0;
|
||
for (int y = 0; y < current_height; y++) {
|
||
for (int x = 0; x < current_width; x++) {
|
||
if (fabsf(data[y * width + x]) > 0.001f) { // Use fabs for better zero detection
|
||
nonzero_level++;
|
||
}
|
||
}
|
||
}
|
||
// fprintf(stderr, "After level %d (%dx%d): nonzero=%d/%d, data[0]=%.1f, data[1]=%.1f, data[width]=%.1f\n",
|
||
// level, current_width, current_height, nonzero_level, current_width * current_height,
|
||
// data[0], data[1], data[width]);
|
||
|
||
if (level == 0) first_frame_levels = 0; // Stop after level 0 of first frame
|
||
}
|
||
}
|
||
|
||
// Debug: Check buffer after all levels complete (disabled to reduce stderr output)
|
||
// static int debug_output_once = 1;
|
||
// if (debug_output_once) {
|
||
// int nonzero_final = 0;
|
||
// for (int i = 0; i < width * height; i++) {
|
||
// if (data[i] != 0.0f) nonzero_final++;
|
||
// }
|
||
// fprintf(stderr, "After ALL IDWT levels complete: nonzero=%d/%d, first 10: ", nonzero_final, width * height);
|
||
// for (int i = 0; i < 10 && i < width * height; i++) {
|
||
// fprintf(stderr, "%.1f ", data[i]);
|
||
// }
|
||
// fprintf(stderr, "\n");
|
||
// debug_output_once = 0;
|
||
// }
|
||
|
||
free(widths);
|
||
free(heights);
|
||
free(temp_row);
|
||
free(temp_col);
|
||
}
|
||
|
||
//=============================================================================
|
||
// Temporal DWT and GOP Decoding (matches TSVM)
|
||
//=============================================================================
|
||
|
||
// Get temporal subband level for a given frame index in a GOP
|
||
static int get_temporal_subband_level(int frame_idx, int num_frames, int temporal_levels) {
|
||
// Match encoder logic exactly (encoder_tav.c:1487-1506)
|
||
// After temporal DWT with N levels, frames are organised as:
|
||
// Frames 0...num_frames/(2^N) = tL...L (N low-passes, coarsest, level 0)
|
||
// Remaining frames are temporal high-pass subbands at various levels
|
||
|
||
// Check each level boundary from coarsest to finest
|
||
for (int level = 0; level < temporal_levels; level++) {
|
||
int frames_at_this_level = num_frames >> (temporal_levels - level);
|
||
if (frame_idx < frames_at_this_level) {
|
||
return level;
|
||
}
|
||
}
|
||
|
||
// Finest level (first decomposition's high-pass)
|
||
return temporal_levels;
|
||
}
|
||
|
||
// Calculate temporal quantiser scale for a given temporal subband level
|
||
static float get_temporal_quantiser_scale(int temporal_level) {
|
||
// Uses exponential scaling: 2^(BETA × level^KAPPA)
|
||
// With BETA=0.6, KAPPA=1.14:
|
||
// - Level 0 (tLL): 2^0.0 = 1.00
|
||
// - Level 1 (tH): 2^0.68 = 1.61
|
||
// - Level 2 (tHH): 2^1.29 = 2.45
|
||
const float BETA = 0.6f; // Temporal scaling exponent
|
||
const float KAPPA = 1.14f;
|
||
return powf(2.0f, BETA * powf(temporal_level, KAPPA));
|
||
}
|
||
|
||
// Inverse Haar 1D DWT
|
||
static void dwt_haar_inverse_1d(float *data, int length) {
|
||
if (length < 2) return;
|
||
|
||
float *temp = malloc(length * sizeof(float));
|
||
const int half = (length + 1) / 2;
|
||
|
||
// Inverse Haar transform: reconstruct from averages and differences
|
||
// Read directly from data array (already has low-pass then high-pass layout)
|
||
for (int i = 0; i < half; i++) {
|
||
if (2 * i + 1 < length) {
|
||
// Reconstruct adjacent pairs from average and difference
|
||
temp[2 * i] = data[i] + data[half + i]; // average + difference
|
||
temp[2 * i + 1] = data[i] - data[half + i]; // average - difference
|
||
} else {
|
||
// Handle odd length: last sample comes from low-pass only
|
||
temp[2 * i] = data[i];
|
||
}
|
||
}
|
||
|
||
// Copy reconstructed data back
|
||
for (int i = 0; i < length; i++) {
|
||
data[i] = temp[i];
|
||
}
|
||
|
||
free(temp);
|
||
}
|
||
|
||
// Apply inverse 3D DWT to GOP data (spatial + temporal)
|
||
// Order: SPATIAL first (each frame), then TEMPORAL (across frames)
|
||
static void apply_inverse_3d_dwt(float **gop_y, float **gop_co, float **gop_cg,
|
||
int width, int height, int gop_size,
|
||
int spatial_levels, int temporal_levels, int filter_type) {
|
||
// Step 1: Apply inverse 2D spatial DWT to each frame
|
||
for (int t = 0; t < gop_size; t++) {
|
||
apply_inverse_dwt_multilevel(gop_y[t], width, height, spatial_levels, filter_type);
|
||
apply_inverse_dwt_multilevel(gop_co[t], width, height, spatial_levels, filter_type);
|
||
apply_inverse_dwt_multilevel(gop_cg[t], width, height, spatial_levels, filter_type);
|
||
}
|
||
|
||
// Step 2: Apply inverse temporal DWT to each spatial location
|
||
// Only needed for GOPs with multiple frames (skip for I-frames)
|
||
if (gop_size < 2) return;
|
||
|
||
// Pre-calculate all intermediate lengths for temporal DWT (same fix as TAD)
|
||
// This ensures correct reconstruction for non-power-of-2 GOP sizes
|
||
int *temporal_lengths = malloc((temporal_levels + 1) * sizeof(int));
|
||
temporal_lengths[0] = gop_size;
|
||
for (int i = 1; i <= temporal_levels; i++) {
|
||
temporal_lengths[i] = (temporal_lengths[i - 1] + 1) / 2;
|
||
}
|
||
|
||
float *temporal_line = malloc(gop_size * sizeof(float));
|
||
for (int y = 0; y < height; y++) {
|
||
for (int x = 0; x < width; x++) {
|
||
const int pixel_idx = y * width + x;
|
||
|
||
// Process Y channel
|
||
for (int t = 0; t < gop_size; t++) {
|
||
temporal_line[t] = gop_y[t][pixel_idx];
|
||
}
|
||
for (int level = temporal_levels - 1; level >= 0; level--) {
|
||
const int level_frames = temporal_lengths[level];
|
||
if (level_frames >= 2) {
|
||
dwt_haar_inverse_1d(temporal_line, level_frames);
|
||
}
|
||
}
|
||
for (int t = 0; t < gop_size; t++) {
|
||
gop_y[t][pixel_idx] = temporal_line[t];
|
||
}
|
||
|
||
// Process Co channel
|
||
for (int t = 0; t < gop_size; t++) {
|
||
temporal_line[t] = gop_co[t][pixel_idx];
|
||
}
|
||
for (int level = temporal_levels - 1; level >= 0; level--) {
|
||
const int level_frames = temporal_lengths[level];
|
||
if (level_frames >= 2) {
|
||
dwt_haar_inverse_1d(temporal_line, level_frames);
|
||
}
|
||
}
|
||
for (int t = 0; t < gop_size; t++) {
|
||
gop_co[t][pixel_idx] = temporal_line[t];
|
||
}
|
||
|
||
// Process Cg channel
|
||
for (int t = 0; t < gop_size; t++) {
|
||
temporal_line[t] = gop_cg[t][pixel_idx];
|
||
}
|
||
for (int level = temporal_levels - 1; level >= 0; level--) {
|
||
const int level_frames = temporal_lengths[level];
|
||
if (level_frames >= 2) {
|
||
dwt_haar_inverse_1d(temporal_line, level_frames);
|
||
}
|
||
}
|
||
for (int t = 0; t < gop_size; t++) {
|
||
gop_cg[t][pixel_idx] = temporal_line[t];
|
||
}
|
||
}
|
||
}
|
||
|
||
free(temporal_line);
|
||
free(temporal_lengths);
|
||
}
|
||
|
||
// Postprocess GOP unified block to per-frame coefficients (2-bit map format)
|
||
static int16_t ***postprocess_gop_unified(const uint8_t *decompressed_data, size_t data_size,
|
||
int gop_size, int num_pixels, int channel_layout) {
|
||
// 2 bits per coefficient
|
||
const int map_bytes_per_frame = (num_pixels * 2 + 7) / 8;
|
||
|
||
// Determine which channels are present
|
||
// Bit 0: has alpha, Bit 1: has chroma (inverted), Bit 2: has luma (inverted)
|
||
const int has_y = (channel_layout & 0x04) == 0;
|
||
const int has_co = (channel_layout & 0x02) == 0; // Inverted: 0 = has chroma
|
||
const int has_cg = (channel_layout & 0x02) == 0; // Inverted: 0 = has chroma
|
||
|
||
// Calculate buffer positions for maps
|
||
int read_ptr = 0;
|
||
const int y_maps_start = has_y ? read_ptr : -1;
|
||
if (has_y) read_ptr += map_bytes_per_frame * gop_size;
|
||
|
||
const int co_maps_start = has_co ? read_ptr : -1;
|
||
if (has_co) read_ptr += map_bytes_per_frame * gop_size;
|
||
|
||
const int cg_maps_start = has_cg ? read_ptr : -1;
|
||
if (has_cg) read_ptr += map_bytes_per_frame * gop_size;
|
||
|
||
// Count "other" values (code 11) across ALL frames
|
||
int y_other_count = 0;
|
||
int co_other_count = 0;
|
||
int cg_other_count = 0;
|
||
|
||
for (int frame = 0; frame < gop_size; frame++) {
|
||
const int frame_map_offset = frame * map_bytes_per_frame;
|
||
for (int i = 0; i < num_pixels; i++) {
|
||
const int bit_pos = i * 2;
|
||
const int byte_idx = bit_pos / 8;
|
||
const int bit_offset = bit_pos % 8;
|
||
|
||
if (has_y && y_maps_start + frame_map_offset + byte_idx < (int)data_size) {
|
||
int code = (decompressed_data[y_maps_start + frame_map_offset + byte_idx] >> bit_offset) & 0x03;
|
||
if (bit_offset == 7 && byte_idx + 1 < map_bytes_per_frame) {
|
||
const int next_byte = decompressed_data[y_maps_start + frame_map_offset + byte_idx + 1] & 0xFF;
|
||
code = (code & 0x01) | ((next_byte & 0x01) << 1);
|
||
}
|
||
if (code == 3) y_other_count++;
|
||
}
|
||
if (has_co && co_maps_start + frame_map_offset + byte_idx < (int)data_size) {
|
||
int code = (decompressed_data[co_maps_start + frame_map_offset + byte_idx] >> bit_offset) & 0x03;
|
||
if (bit_offset == 7 && byte_idx + 1 < map_bytes_per_frame) {
|
||
const int next_byte = decompressed_data[co_maps_start + frame_map_offset + byte_idx + 1] & 0xFF;
|
||
code = (code & 0x01) | ((next_byte & 0x01) << 1);
|
||
}
|
||
if (code == 3) co_other_count++;
|
||
}
|
||
if (has_cg && cg_maps_start + frame_map_offset + byte_idx < (int)data_size) {
|
||
int code = (decompressed_data[cg_maps_start + frame_map_offset + byte_idx] >> bit_offset) & 0x03;
|
||
if (bit_offset == 7 && byte_idx + 1 < map_bytes_per_frame) {
|
||
const int next_byte = decompressed_data[cg_maps_start + frame_map_offset + byte_idx + 1] & 0xFF;
|
||
code = (code & 0x01) | ((next_byte & 0x01) << 1);
|
||
}
|
||
if (code == 3) cg_other_count++;
|
||
}
|
||
}
|
||
}
|
||
|
||
// Value arrays start after all maps
|
||
const int y_values_start = read_ptr;
|
||
read_ptr += y_other_count * 2;
|
||
|
||
const int co_values_start = read_ptr;
|
||
read_ptr += co_other_count * 2;
|
||
|
||
const int cg_values_start = read_ptr;
|
||
|
||
// Allocate output arrays: [gop_size][3 channels][num_pixels]
|
||
int16_t ***output = malloc(gop_size * sizeof(int16_t **));
|
||
for (int t = 0; t < gop_size; t++) {
|
||
output[t] = malloc(3 * sizeof(int16_t *));
|
||
output[t][0] = calloc(num_pixels, sizeof(int16_t)); // Y
|
||
output[t][1] = calloc(num_pixels, sizeof(int16_t)); // Co
|
||
output[t][2] = calloc(num_pixels, sizeof(int16_t)); // Cg
|
||
}
|
||
|
||
int y_value_idx = 0;
|
||
int co_value_idx = 0;
|
||
int cg_value_idx = 0;
|
||
|
||
for (int frame = 0; frame < gop_size; frame++) {
|
||
const int frame_map_offset = frame * map_bytes_per_frame;
|
||
for (int i = 0; i < num_pixels; i++) {
|
||
const int bit_pos = i * 2;
|
||
const int byte_idx = bit_pos / 8;
|
||
const int bit_offset = bit_pos % 8;
|
||
|
||
// Decode Y
|
||
if (has_y && y_maps_start + frame_map_offset + byte_idx < (int)data_size) {
|
||
int code = (decompressed_data[y_maps_start + frame_map_offset + byte_idx] >> bit_offset) & 0x03;
|
||
if (bit_offset == 7 && byte_idx + 1 < map_bytes_per_frame) {
|
||
const int next_byte = decompressed_data[y_maps_start + frame_map_offset + byte_idx + 1] & 0xFF;
|
||
code = (code & 0x01) | ((next_byte & 0x01) << 1);
|
||
}
|
||
if (code == 0) {
|
||
output[frame][0][i] = 0;
|
||
} else if (code == 1) {
|
||
output[frame][0][i] = 1;
|
||
} else if (code == 2) {
|
||
output[frame][0][i] = -1;
|
||
} else { // code == 3
|
||
const int val_offset = y_values_start + y_value_idx * 2;
|
||
y_value_idx++;
|
||
if (val_offset + 1 < (int)data_size) {
|
||
const int lo = decompressed_data[val_offset] & 0xFF;
|
||
const int hi = (int8_t)decompressed_data[val_offset + 1];
|
||
output[frame][0][i] = (int16_t)((hi << 8) | lo);
|
||
} else {
|
||
output[frame][0][i] = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
// Decode Co
|
||
if (has_co && co_maps_start + frame_map_offset + byte_idx < (int)data_size) {
|
||
int code = (decompressed_data[co_maps_start + frame_map_offset + byte_idx] >> bit_offset) & 0x03;
|
||
if (bit_offset == 7 && byte_idx + 1 < map_bytes_per_frame) {
|
||
const int next_byte = decompressed_data[co_maps_start + frame_map_offset + byte_idx + 1] & 0xFF;
|
||
code = (code & 0x01) | ((next_byte & 0x01) << 1);
|
||
}
|
||
if (code == 0) {
|
||
output[frame][1][i] = 0;
|
||
} else if (code == 1) {
|
||
output[frame][1][i] = 1;
|
||
} else if (code == 2) {
|
||
output[frame][1][i] = -1;
|
||
} else { // code == 3
|
||
const int val_offset = co_values_start + co_value_idx * 2;
|
||
co_value_idx++;
|
||
if (val_offset + 1 < (int)data_size) {
|
||
const int lo = decompressed_data[val_offset] & 0xFF;
|
||
const int hi = (int8_t)decompressed_data[val_offset + 1];
|
||
output[frame][1][i] = (int16_t)((hi << 8) | lo);
|
||
} else {
|
||
output[frame][1][i] = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
// Decode Cg
|
||
if (has_cg && cg_maps_start + frame_map_offset + byte_idx < (int)data_size) {
|
||
int code = (decompressed_data[cg_maps_start + frame_map_offset + byte_idx] >> bit_offset) & 0x03;
|
||
if (bit_offset == 7 && byte_idx + 1 < map_bytes_per_frame) {
|
||
const int next_byte = decompressed_data[cg_maps_start + frame_map_offset + byte_idx + 1] & 0xFF;
|
||
code = (code & 0x01) | ((next_byte & 0x01) << 1);
|
||
}
|
||
if (code == 0) {
|
||
output[frame][2][i] = 0;
|
||
} else if (code == 1) {
|
||
output[frame][2][i] = 1;
|
||
} else if (code == 2) {
|
||
output[frame][2][i] = -1;
|
||
} else { // code == 3
|
||
const int val_offset = cg_values_start + cg_value_idx * 2;
|
||
cg_value_idx++;
|
||
if (val_offset + 1 < (int)data_size) {
|
||
const int lo = decompressed_data[val_offset] & 0xFF;
|
||
const int hi = (int8_t)decompressed_data[val_offset + 1];
|
||
output[frame][2][i] = (int16_t)((hi << 8) | lo);
|
||
} else {
|
||
output[frame][2][i] = 0;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return output;
|
||
}
|
||
|
||
// Postprocess GOP RAW format to per-frame coefficients (entropyCoder=2)
|
||
// Layout: [All_Y_coeffs][All_Co_coeffs][All_Cg_coeffs] (raw int16 arrays)
|
||
static int16_t ***postprocess_gop_raw(const uint8_t *decompressed_data, size_t data_size,
|
||
int gop_size, int num_pixels, int channel_layout) {
|
||
// Determine which channels are present
|
||
const int has_y = (channel_layout & 0x04) == 0;
|
||
const int has_co = (channel_layout & 0x02) == 0;
|
||
const int has_cg = (channel_layout & 0x02) == 0;
|
||
|
||
// Allocate output arrays: [gop_size][3 channels][num_pixels]
|
||
int16_t ***output = malloc(gop_size * sizeof(int16_t **));
|
||
for (int t = 0; t < gop_size; t++) {
|
||
output[t] = malloc(3 * sizeof(int16_t *));
|
||
output[t][0] = calloc(num_pixels, sizeof(int16_t)); // Y
|
||
output[t][1] = calloc(num_pixels, sizeof(int16_t)); // Co
|
||
output[t][2] = calloc(num_pixels, sizeof(int16_t)); // Cg
|
||
}
|
||
|
||
int offset = 0;
|
||
|
||
// Read Y channel (all frames concatenated)
|
||
if (has_y) {
|
||
const int channel_size = gop_size * num_pixels * sizeof(int16_t);
|
||
if (offset + channel_size > (int)data_size) {
|
||
fprintf(stderr, "Error: Not enough data for Y channel in RAW GOP\n");
|
||
goto error_cleanup;
|
||
}
|
||
const int16_t *y_data = (const int16_t *)(decompressed_data + offset);
|
||
for (int t = 0; t < gop_size; t++) {
|
||
memcpy(output[t][0], y_data + t * num_pixels, num_pixels * sizeof(int16_t));
|
||
}
|
||
offset += channel_size;
|
||
}
|
||
|
||
// Read Co channel (all frames concatenated)
|
||
if (has_co) {
|
||
const int channel_size = gop_size * num_pixels * sizeof(int16_t);
|
||
if (offset + channel_size > (int)data_size) {
|
||
fprintf(stderr, "Error: Not enough data for Co channel in RAW GOP\n");
|
||
goto error_cleanup;
|
||
}
|
||
const int16_t *co_data = (const int16_t *)(decompressed_data + offset);
|
||
for (int t = 0; t < gop_size; t++) {
|
||
memcpy(output[t][1], co_data + t * num_pixels, num_pixels * sizeof(int16_t));
|
||
}
|
||
offset += channel_size;
|
||
}
|
||
|
||
// Read Cg channel (all frames concatenated)
|
||
if (has_cg) {
|
||
const int channel_size = gop_size * num_pixels * sizeof(int16_t);
|
||
if (offset + channel_size > (int)data_size) {
|
||
fprintf(stderr, "Error: Not enough data for Cg channel in RAW GOP\n");
|
||
goto error_cleanup;
|
||
}
|
||
const int16_t *cg_data = (const int16_t *)(decompressed_data + offset);
|
||
for (int t = 0; t < gop_size; t++) {
|
||
memcpy(output[t][2], cg_data + t * num_pixels, num_pixels * sizeof(int16_t));
|
||
}
|
||
offset += channel_size;
|
||
}
|
||
|
||
return output;
|
||
|
||
error_cleanup:
|
||
for (int t = 0; t < gop_size; t++) {
|
||
free(output[t][0]);
|
||
free(output[t][1]);
|
||
free(output[t][2]);
|
||
free(output[t]);
|
||
}
|
||
free(output);
|
||
return NULL;
|
||
}
|
||
|
||
// Postprocess GOP EZBC format to per-frame coefficients (entropyCoder=1)
|
||
// Layout: [frame0_size(4)][frame0_ezbc_data][frame1_size(4)][frame1_ezbc_data]...
|
||
// Note: EZBC is a complex embedded bitplane codec - this is a simplified placeholder
|
||
static int16_t ***postprocess_gop_ezbc(const uint8_t *decompressed_data, size_t data_size,
|
||
int gop_size, int num_pixels, int channel_layout) {
|
||
// Allocate output arrays: [gop_size][3 channels][num_pixels]
|
||
int16_t ***output = malloc(gop_size * sizeof(int16_t **));
|
||
for (int t = 0; t < gop_size; t++) {
|
||
output[t] = malloc(3 * sizeof(int16_t *));
|
||
output[t][0] = calloc(num_pixels, sizeof(int16_t)); // Y
|
||
output[t][1] = calloc(num_pixels, sizeof(int16_t)); // Co
|
||
output[t][2] = calloc(num_pixels, sizeof(int16_t)); // Cg
|
||
}
|
||
|
||
int offset = 0;
|
||
|
||
// Read each frame
|
||
for (int t = 0; t < gop_size; t++) {
|
||
if (offset + 4 > (int)data_size) {
|
||
fprintf(stderr, "Error: Not enough data for frame %d size in EZBC GOP\n", t);
|
||
goto error_cleanup;
|
||
}
|
||
|
||
// Read frame size (4 bytes, little-endian)
|
||
const uint32_t frame_size = ((uint32_t)decompressed_data[offset + 0]) |
|
||
((uint32_t)decompressed_data[offset + 1] << 8) |
|
||
((uint32_t)decompressed_data[offset + 2] << 16) |
|
||
((uint32_t)decompressed_data[offset + 3] << 24);
|
||
offset += 4;
|
||
|
||
if (offset + frame_size > data_size) {
|
||
fprintf(stderr, "Error: Frame %d EZBC data exceeds buffer (size=%u, available=%zu)\n",
|
||
t, frame_size, data_size - offset);
|
||
goto error_cleanup;
|
||
}
|
||
|
||
// Decode EZBC frame using the single-frame EZBC decoder
|
||
postprocess_coefficients_ezbc(
|
||
(uint8_t *)(decompressed_data + offset), num_pixels,
|
||
output[t][0], output[t][1], output[t][2],
|
||
channel_layout);
|
||
|
||
offset += frame_size;
|
||
}
|
||
|
||
return output;
|
||
|
||
error_cleanup:
|
||
for (int t = 0; t < gop_size; t++) {
|
||
free(output[t][0]);
|
||
free(output[t][1]);
|
||
free(output[t][2]);
|
||
free(output[t]);
|
||
}
|
||
free(output);
|
||
return NULL;
|
||
}
|
||
|
||
//=============================================================================
|
||
// YCoCg-R / ICtCp to RGB Conversion (matches TSVM)
|
||
//=============================================================================
|
||
|
||
static void ycocg_r_to_rgb(float y, float co, float cg, uint8_t *r, uint8_t *g, uint8_t *b) {
|
||
float tmp = y - cg / 2.0f;
|
||
float g_val = cg + tmp;
|
||
float b_val = tmp - co / 2.0f;
|
||
float r_val = co + b_val;
|
||
|
||
// FIX: Use truncation (not rounding) to match Kotlin decoder behavior
|
||
// Kotlin uses .toInt() which truncates toward zero (floor for positive values)
|
||
*r = CLAMP((int)(r_val), 0, 255);
|
||
*g = CLAMP((int)(g_val), 0, 255);
|
||
*b = CLAMP((int)(b_val), 0, 255);
|
||
}
|
||
|
||
// ICtCp to RGB conversion (for even TAV versions)
|
||
static void ictcp_to_rgb(float i, float ct, float cp, uint8_t *r, uint8_t *g, uint8_t *b) {
|
||
// ICtCp → RGB conversion (inverse of RGB → ICtCp)
|
||
// Step 1: ICtCp → LMS
|
||
float l = i + 0.008609f * ct;
|
||
float m = i - 0.008609f * ct;
|
||
float s = i + 0.560031f * cp;
|
||
|
||
// Step 2: LMS (nonlinear) → LMS (linear)
|
||
// Inverse PQ transfer function (simplified)
|
||
l = powf(fmaxf(l, 0.0f), 1.0f / 0.1593f);
|
||
m = powf(fmaxf(m, 0.0f), 1.0f / 0.1593f);
|
||
s = powf(fmaxf(s, 0.0f), 1.0f / 0.1593f);
|
||
|
||
// Step 3: LMS → RGB
|
||
float r_val = 5.432622f * l - 4.679910f * m + 0.247288f * s;
|
||
float g_val = -1.106160f * l + 2.311198f * m - 0.205038f * s;
|
||
float b_val = 0.028262f * l - 0.195689f * m + 1.167427f * s;
|
||
|
||
*r = CLAMP((int)(r_val * 255.0f + 0.5f), 0, 255);
|
||
*g = CLAMP((int)(g_val * 255.0f + 0.5f), 0, 255);
|
||
*b = CLAMP((int)(b_val * 255.0f + 0.5f), 0, 255);
|
||
}
|
||
|
||
//=============================================================================
|
||
// WAV File Writing
|
||
//=============================================================================
|
||
|
||
static void write_wav_header(FILE *fp, uint32_t sample_rate, uint16_t channels, uint32_t data_size) {
|
||
// RIFF header
|
||
fwrite("RIFF", 1, 4, fp);
|
||
uint32_t file_size = 36 + data_size;
|
||
fwrite(&file_size, 4, 1, fp);
|
||
fwrite("WAVE", 1, 4, fp);
|
||
|
||
// fmt chunk
|
||
fwrite("fmt ", 1, 4, fp);
|
||
uint32_t fmt_size = 16;
|
||
fwrite(&fmt_size, 4, 1, fp);
|
||
uint16_t audio_format = 1; // PCM
|
||
fwrite(&audio_format, 2, 1, fp);
|
||
fwrite(&channels, 2, 1, fp);
|
||
fwrite(&sample_rate, 4, 1, fp);
|
||
uint32_t byte_rate = sample_rate * channels * 1; // 1 byte per sample (u8)
|
||
fwrite(&byte_rate, 4, 1, fp);
|
||
uint16_t block_align = channels * 1;
|
||
fwrite(&block_align, 2, 1, fp);
|
||
uint16_t bits_per_sample = 8;
|
||
fwrite(&bits_per_sample, 2, 1, fp);
|
||
|
||
// data chunk
|
||
fwrite("data", 1, 4, fp);
|
||
fwrite(&data_size, 4, 1, fp);
|
||
}
|
||
|
||
//=============================================================================
|
||
// Decoder State Structure
|
||
//=============================================================================
|
||
|
||
typedef struct {
|
||
FILE *input_fp;
|
||
tav_header_t header;
|
||
uint8_t *current_frame_rgb;
|
||
uint8_t *reference_frame_rgb;
|
||
float *dwt_buffer_y;
|
||
float *dwt_buffer_co;
|
||
float *dwt_buffer_cg;
|
||
float *reference_ycocg_y; // For P-frame delta accumulation
|
||
float *reference_ycocg_co;
|
||
float *reference_ycocg_cg;
|
||
int frame_count;
|
||
int frame_size;
|
||
int is_monoblock; // True if version 3-6 (single tile mode)
|
||
|
||
// FFmpeg pipe for video only (audio from file)
|
||
FILE *video_pipe;
|
||
pid_t ffmpeg_pid;
|
||
|
||
// Temporary audio file
|
||
char *audio_file_path;
|
||
} tav_decoder_t;
|
||
|
||
//=============================================================================
|
||
// Pass 1: Extract Audio to WAV File
|
||
//=============================================================================
|
||
|
||
static int extract_audio_to_wav(const char *input_file, const char *wav_file, int verbose) {
|
||
FILE *input_fp = fopen(input_file, "rb");
|
||
if (!input_fp) {
|
||
fprintf(stderr, "Failed to open input file for audio extraction\n");
|
||
return -1;
|
||
}
|
||
|
||
// Read header
|
||
tav_header_t header;
|
||
if (fread(&header, sizeof(tav_header_t), 1, input_fp) != 1) {
|
||
fclose(input_fp);
|
||
return -1;
|
||
}
|
||
|
||
// Open temporary audio file
|
||
FILE *wav_fp = fopen(wav_file, "wb");
|
||
if (!wav_fp) {
|
||
fprintf(stderr, "Failed to create temporary audio file\n");
|
||
fclose(input_fp);
|
||
return -1;
|
||
}
|
||
|
||
// Write placeholder WAV header (will be updated later)
|
||
write_wav_header(wav_fp, 32000, 2, 0);
|
||
|
||
uint32_t total_audio_bytes = 0;
|
||
int packet_count = 0;
|
||
|
||
if (verbose) {
|
||
fprintf(stderr, "[Pass 1] Extracting audio to %s...\n", wav_file);
|
||
}
|
||
|
||
// Read all packets and extract audio
|
||
while (1) {
|
||
uint8_t packet_type;
|
||
if (fread(&packet_type, 1, 1, input_fp) != 1) {
|
||
break; // EOF
|
||
}
|
||
|
||
packet_count++;
|
||
|
||
// Skip non-audio packets
|
||
if (packet_type == TAV_PACKET_SYNC || packet_type == TAV_PACKET_SYNC_NTSC) {
|
||
continue;
|
||
}
|
||
|
||
if (packet_type == TAV_PACKET_TIMECODE) {
|
||
fseek(input_fp, 8, SEEK_CUR); // Skip timecode
|
||
continue;
|
||
}
|
||
|
||
if (packet_type == TAV_PACKET_GOP_SYNC) {
|
||
fseek(input_fp, 1, SEEK_CUR); // Skip frame count
|
||
continue;
|
||
}
|
||
|
||
if (packet_type == TAV_PACKET_GOP_UNIFIED) {
|
||
uint8_t gop_size;
|
||
uint32_t compressed_size;
|
||
fread(&gop_size, 1, 1, input_fp);
|
||
fread(&compressed_size, 4, 1, input_fp);
|
||
fseek(input_fp, compressed_size, SEEK_CUR); // Skip GOP data
|
||
continue;
|
||
}
|
||
|
||
// Handle TAD audio
|
||
if (packet_type == TAV_PACKET_AUDIO_TAD) {
|
||
uint16_t sample_count_wrapper;
|
||
uint32_t payload_size_plus_7;
|
||
fread(&sample_count_wrapper, 2, 1, input_fp);
|
||
fread(&payload_size_plus_7, 4, 1, input_fp);
|
||
|
||
uint16_t sample_count_chunk;
|
||
uint8_t quantiser_index;
|
||
uint32_t compressed_size;
|
||
fread(&sample_count_chunk, 2, 1, input_fp);
|
||
fread(&quantiser_index, 1, 1, input_fp);
|
||
fread(&compressed_size, 4, 1, input_fp);
|
||
|
||
uint8_t *tad_compressed = malloc(compressed_size);
|
||
fread(tad_compressed, 1, compressed_size, input_fp);
|
||
|
||
// Build TAD chunk
|
||
size_t tad_chunk_size = 2 + 1 + 4 + compressed_size;
|
||
uint8_t *tad_chunk = malloc(tad_chunk_size);
|
||
memcpy(tad_chunk, &sample_count_chunk, 2);
|
||
memcpy(tad_chunk + 2, &quantiser_index, 1);
|
||
memcpy(tad_chunk + 3, &compressed_size, 4);
|
||
memcpy(tad_chunk + 7, tad_compressed, compressed_size);
|
||
free(tad_compressed);
|
||
|
||
// Decode TAD
|
||
uint8_t *pcmu8_output = malloc(sample_count_chunk * 2);
|
||
size_t bytes_consumed, samples_decoded;
|
||
int decode_result = tad32_decode_chunk(tad_chunk, tad_chunk_size,
|
||
pcmu8_output, &bytes_consumed, &samples_decoded);
|
||
|
||
if (decode_result >= 0) {
|
||
size_t pcm_bytes = samples_decoded * 2;
|
||
fwrite(pcmu8_output, 1, pcm_bytes, wav_fp);
|
||
total_audio_bytes += pcm_bytes;
|
||
}
|
||
|
||
free(tad_chunk);
|
||
free(pcmu8_output);
|
||
continue;
|
||
}
|
||
|
||
// Handle PCM8 audio
|
||
if (packet_type == TAV_PACKET_AUDIO_PCM8) {
|
||
uint32_t packet_size;
|
||
fread(&packet_size, 4, 1, input_fp);
|
||
|
||
uint8_t *compressed_data = malloc(packet_size);
|
||
fread(compressed_data, 1, packet_size, input_fp);
|
||
|
||
// Decompress
|
||
size_t decompressed_bound = ZSTD_getFrameContentSize(compressed_data, packet_size);
|
||
uint8_t *pcm_data = malloc(decompressed_bound);
|
||
size_t decompressed_size = ZSTD_decompress(pcm_data, decompressed_bound,
|
||
compressed_data, packet_size);
|
||
free(compressed_data);
|
||
|
||
if (!ZSTD_isError(decompressed_size)) {
|
||
fwrite(pcm_data, 1, decompressed_size, wav_fp);
|
||
total_audio_bytes += decompressed_size;
|
||
}
|
||
|
||
free(pcm_data);
|
||
continue;
|
||
}
|
||
|
||
// Handle EXTENDED_HDR packet (key-value pairs)
|
||
if (packet_type == TAV_PACKET_EXTENDED_HDR) {
|
||
uint16_t num_pairs;
|
||
fread(&num_pairs, 2, 1, input_fp);
|
||
for (int i = 0; i < num_pairs; i++) {
|
||
fseek(input_fp, 4, SEEK_CUR); // Skip key (4 bytes)
|
||
uint8_t value_type;
|
||
fread(&value_type, 1, 1, input_fp);
|
||
if (value_type == 0x04) {
|
||
fseek(input_fp, 8, SEEK_CUR); // uint64 value
|
||
} else if (value_type == 0x10) {
|
||
uint16_t str_len;
|
||
fread(&str_len, 2, 1, input_fp);
|
||
fseek(input_fp, str_len, SEEK_CUR); // string value
|
||
}
|
||
}
|
||
continue;
|
||
}
|
||
|
||
// Read packet size for standard packets
|
||
uint32_t packet_size;
|
||
if (fread(&packet_size, 4, 1, input_fp) == 1) {
|
||
fseek(input_fp, packet_size, SEEK_CUR);
|
||
}
|
||
}
|
||
|
||
// Update WAV header with actual data size
|
||
fseek(wav_fp, 0, SEEK_SET);
|
||
write_wav_header(wav_fp, 32000, 2, total_audio_bytes);
|
||
|
||
fclose(wav_fp);
|
||
fclose(input_fp);
|
||
|
||
if (verbose) {
|
||
fprintf(stderr, "[Pass 1] Extracted %u bytes of audio (%d packets processed)\n",
|
||
total_audio_bytes, packet_count);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
//=============================================================================
|
||
// Decoder Initialisation and Cleanup
|
||
//=============================================================================
|
||
|
||
static tav_decoder_t* tav_decoder_init(const char *input_file, const char *output_file, const char *audio_file) {
|
||
tav_decoder_t *decoder = calloc(1, sizeof(tav_decoder_t));
|
||
if (!decoder) return NULL;
|
||
|
||
decoder->input_fp = fopen(input_file, "rb");
|
||
if (!decoder->input_fp) {
|
||
free(decoder);
|
||
return NULL;
|
||
}
|
||
|
||
// Read header
|
||
if (fread(&decoder->header, sizeof(tav_header_t), 1, decoder->input_fp) != 1) {
|
||
fclose(decoder->input_fp);
|
||
free(decoder);
|
||
return NULL;
|
||
}
|
||
|
||
// Verify magic
|
||
if (memcmp(decoder->header.magic, TAV_MAGIC, 8) != 0) {
|
||
fclose(decoder->input_fp);
|
||
free(decoder);
|
||
return NULL;
|
||
}
|
||
|
||
decoder->frame_size = decoder->header.width * decoder->header.height;
|
||
decoder->is_monoblock = (decoder->header.version >= 3 && decoder->header.version <= 6);
|
||
decoder->audio_file_path = strdup(audio_file);
|
||
|
||
// Allocate buffers
|
||
decoder->current_frame_rgb = calloc(decoder->frame_size * 3, 1);
|
||
decoder->reference_frame_rgb = calloc(decoder->frame_size * 3, 1);
|
||
decoder->dwt_buffer_y = calloc(decoder->frame_size, sizeof(float));
|
||
decoder->dwt_buffer_co = calloc(decoder->frame_size, sizeof(float));
|
||
decoder->dwt_buffer_cg = calloc(decoder->frame_size, sizeof(float));
|
||
decoder->reference_ycocg_y = calloc(decoder->frame_size, sizeof(float));
|
||
decoder->reference_ycocg_co = calloc(decoder->frame_size, sizeof(float));
|
||
decoder->reference_ycocg_cg = calloc(decoder->frame_size, sizeof(float));
|
||
|
||
// Create FFmpeg process for video encoding (video pipe only, audio from file)
|
||
int video_pipe_fd[2];
|
||
if (pipe(video_pipe_fd) == -1) {
|
||
fprintf(stderr, "Failed to create video pipe\n");
|
||
free(decoder->current_frame_rgb);
|
||
free(decoder->reference_frame_rgb);
|
||
free(decoder->dwt_buffer_y);
|
||
free(decoder->dwt_buffer_co);
|
||
free(decoder->dwt_buffer_cg);
|
||
free(decoder->reference_ycocg_y);
|
||
free(decoder->reference_ycocg_co);
|
||
free(decoder->reference_ycocg_cg);
|
||
free(decoder->audio_file_path);
|
||
fclose(decoder->input_fp);
|
||
free(decoder);
|
||
return NULL;
|
||
}
|
||
|
||
decoder->ffmpeg_pid = fork();
|
||
if (decoder->ffmpeg_pid == -1) {
|
||
fprintf(stderr, "Failed to fork FFmpeg process\n");
|
||
close(video_pipe_fd[0]); close(video_pipe_fd[1]);
|
||
free(decoder->current_frame_rgb);
|
||
free(decoder->reference_frame_rgb);
|
||
free(decoder->dwt_buffer_y);
|
||
free(decoder->dwt_buffer_co);
|
||
free(decoder->dwt_buffer_cg);
|
||
free(decoder->reference_ycocg_y);
|
||
free(decoder->reference_ycocg_co);
|
||
free(decoder->reference_ycocg_cg);
|
||
free(decoder->audio_file_path);
|
||
fclose(decoder->input_fp);
|
||
free(decoder);
|
||
return NULL;
|
||
} else if (decoder->ffmpeg_pid == 0) {
|
||
// Child process - FFmpeg
|
||
close(video_pipe_fd[1]); // Close write end
|
||
|
||
char video_size[32];
|
||
char framerate[16];
|
||
snprintf(video_size, sizeof(video_size), "%dx%d", decoder->header.width, decoder->header.height);
|
||
snprintf(framerate, sizeof(framerate), "%d", decoder->header.fps);
|
||
|
||
// Redirect video pipe to fd 3
|
||
dup2(video_pipe_fd[0], 3); // Video input on fd 3
|
||
close(video_pipe_fd[0]);
|
||
|
||
execl("/usr/bin/ffmpeg", "ffmpeg",
|
||
"-f", "rawvideo",
|
||
"-pixel_format", "rgb24",
|
||
"-video_size", video_size,
|
||
"-framerate", framerate,
|
||
"-i", "pipe:3", // Video from fd 3
|
||
"-i", audio_file, // Audio from file
|
||
"-color_range", "2",
|
||
"-c:v", "ffv1", // FFV1 codec
|
||
"-level", "3", // FFV1 level 3
|
||
"-coder", "1", // Range coder
|
||
"-context", "1", // Large context
|
||
"-g", "1", // GOP size 1 (all I-frames)
|
||
"-slices", "24", // 24 slices for threading
|
||
"-slicecrc", "1", // CRC per slice
|
||
"-pixel_format", "rgb24", // make FFmpeg encode to RGB
|
||
"-color_range", "2",
|
||
"-c:a", "pcm_u8", // Audio codec (PCM unsigned 8-bit)
|
||
"-f", "matroska", // MKV container
|
||
output_file,
|
||
"-y", // Overwrite output
|
||
"-v", "warning", // Minimal logging
|
||
(char*)NULL);
|
||
|
||
fprintf(stderr, "Failed to start FFmpeg\n");
|
||
exit(1);
|
||
} else {
|
||
// Parent process
|
||
close(video_pipe_fd[0]); // Close read end
|
||
|
||
decoder->video_pipe = fdopen(video_pipe_fd[1], "wb");
|
||
|
||
if (!decoder->video_pipe) {
|
||
fprintf(stderr, "Failed to open video pipe for writing\n");
|
||
kill(decoder->ffmpeg_pid, SIGTERM);
|
||
free(decoder->current_frame_rgb);
|
||
free(decoder->reference_frame_rgb);
|
||
free(decoder->dwt_buffer_y);
|
||
free(decoder->dwt_buffer_co);
|
||
free(decoder->dwt_buffer_cg);
|
||
free(decoder->reference_ycocg_y);
|
||
free(decoder->reference_ycocg_co);
|
||
free(decoder->reference_ycocg_cg);
|
||
free(decoder->audio_file_path);
|
||
fclose(decoder->input_fp);
|
||
free(decoder);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
return decoder;
|
||
}
|
||
|
||
static void tav_decoder_free(tav_decoder_t *decoder) {
|
||
if (!decoder) return;
|
||
|
||
if (decoder->input_fp) fclose(decoder->input_fp);
|
||
if (decoder->video_pipe) fclose(decoder->video_pipe);
|
||
|
||
// Wait for FFmpeg to finish
|
||
if (decoder->ffmpeg_pid > 0) {
|
||
int status;
|
||
waitpid(decoder->ffmpeg_pid, &status, 0);
|
||
}
|
||
|
||
free(decoder->current_frame_rgb);
|
||
free(decoder->reference_frame_rgb);
|
||
free(decoder->dwt_buffer_y);
|
||
free(decoder->dwt_buffer_co);
|
||
free(decoder->dwt_buffer_cg);
|
||
free(decoder->reference_ycocg_y);
|
||
free(decoder->reference_ycocg_co);
|
||
free(decoder->reference_ycocg_cg);
|
||
free(decoder->audio_file_path);
|
||
free(decoder);
|
||
}
|
||
|
||
//=============================================================================
|
||
// Frame Decoding Logic
|
||
//=============================================================================
|
||
|
||
static int decode_i_or_p_frame(tav_decoder_t *decoder, uint8_t packet_type, uint32_t packet_size) {
|
||
// Variable declarations for cleanup
|
||
uint8_t *compressed_data = NULL;
|
||
uint8_t *decompressed_data = NULL;
|
||
int16_t *quantised_y = NULL;
|
||
int16_t *quantised_co = NULL;
|
||
int16_t *quantised_cg = NULL;
|
||
int decode_success = 1; // Assume success, set to 0 on error
|
||
|
||
// Read and decompress frame data
|
||
compressed_data = malloc(packet_size);
|
||
if (!compressed_data) {
|
||
fprintf(stderr, "Error: Failed to allocate %u bytes for compressed data\n", packet_size);
|
||
decode_success = 0;
|
||
goto write_frame;
|
||
}
|
||
|
||
if (fread(compressed_data, 1, packet_size, decoder->input_fp) != packet_size) {
|
||
fprintf(stderr, "Error: Failed to read %u bytes of compressed frame data\n", packet_size);
|
||
decode_success = 0;
|
||
goto write_frame;
|
||
}
|
||
|
||
size_t decompressed_size = ZSTD_getFrameContentSize(compressed_data, packet_size);
|
||
if (decompressed_size == ZSTD_CONTENTSIZE_ERROR || decompressed_size == ZSTD_CONTENTSIZE_UNKNOWN) {
|
||
fprintf(stderr, "Warning: Could not determine decompressed size, using estimate\n");
|
||
decompressed_size = decoder->frame_size * 3 * sizeof(int16_t) + 1024;
|
||
}
|
||
|
||
decompressed_data = malloc(decompressed_size);
|
||
if (!decompressed_data) {
|
||
fprintf(stderr, "Error: Failed to allocate %zu bytes for decompressed data\n", decompressed_size);
|
||
decode_success = 0;
|
||
goto write_frame;
|
||
}
|
||
|
||
// Debug first 3 frames compression
|
||
// static int decomp_debug = 0;
|
||
// if (decomp_debug < 3) {
|
||
// fprintf(stderr, " [ZSTD frame %d] Compressed size: %u, buffer size: %zu\n", decomp_debug, packet_size, decompressed_size);
|
||
// fprintf(stderr, " [ZSTD frame %d] First 16 bytes of COMPRESSED data: ", decomp_debug);
|
||
// for (int i = 0; i < 16 && i < (int)packet_size; i++) {
|
||
// fprintf(stderr, "%02X ", compressed_data[i]);
|
||
// }
|
||
// fprintf(stderr, "\n");
|
||
// }
|
||
|
||
size_t actual_size = ZSTD_decompress(decompressed_data, decompressed_size, compressed_data, packet_size);
|
||
|
||
if (ZSTD_isError(actual_size)) {
|
||
fprintf(stderr, "Error: ZSTD decompression failed: %s\n", ZSTD_getErrorName(actual_size));
|
||
fprintf(stderr, " Compressed size: %u, Buffer size: %zu\n", packet_size, decompressed_size);
|
||
decode_success = 0;
|
||
goto write_frame;
|
||
}
|
||
|
||
// if (decomp_debug < 3) {
|
||
// fprintf(stderr, " [ZSTD frame %d] Decompressed size: %zu\n", decomp_debug, actual_size);
|
||
// fprintf(stderr, " [ZSTD frame %d] First 16 bytes of DECOMPRESSED data: ", decomp_debug);
|
||
// for (int i = 0; i < 16 && i < (int)actual_size; i++) {
|
||
// fprintf(stderr, "%02X ", decompressed_data[i]);
|
||
// }
|
||
// fprintf(stderr, "\n");
|
||
// decomp_debug++;
|
||
// }
|
||
|
||
// Parse block data
|
||
uint8_t *ptr = decompressed_data;
|
||
uint8_t mode = *ptr++;
|
||
uint8_t qy_override = *ptr++;
|
||
uint8_t qco_override = *ptr++;
|
||
uint8_t qcg_override = *ptr++;
|
||
|
||
// IMPORTANT: Both header and override store QLUT indices, not values!
|
||
// Override of 0 means "use header value"
|
||
int qy = qy_override ? QLUT[qy_override] : QLUT[decoder->header.quantiser_y];
|
||
int qco = qco_override ? QLUT[qco_override] : QLUT[decoder->header.quantiser_co];
|
||
int qcg = qcg_override ? QLUT[qcg_override] : QLUT[decoder->header.quantiser_cg];
|
||
|
||
// Debug first few frames
|
||
// if (decoder->frame_count < 2) {
|
||
// fprintf(stderr, "Frame %d: mode=%d, Q: Y=%d, Co=%d, Cg=%d, decompressed=%zu bytes\n",
|
||
// decoder->frame_count, mode, qy, qco, qcg, actual_size);
|
||
// }
|
||
|
||
if (mode == TAV_MODE_SKIP) {
|
||
// Copy from reference frame
|
||
memcpy(decoder->current_frame_rgb, decoder->reference_frame_rgb, decoder->frame_size * 3);
|
||
} else {
|
||
// Decode coefficients (use function-level variables for proper cleanup)
|
||
int coeff_count = decoder->frame_size;
|
||
quantised_y = calloc(coeff_count, sizeof(int16_t));
|
||
quantised_co = calloc(coeff_count, sizeof(int16_t));
|
||
quantised_cg = calloc(coeff_count, sizeof(int16_t));
|
||
|
||
if (!quantised_y || !quantised_co || !quantised_cg) {
|
||
fprintf(stderr, "Error: Failed to allocate coefficient buffers\n");
|
||
decode_success = 0;
|
||
goto write_frame;
|
||
}
|
||
|
||
// Postprocess coefficients based on entropy_coder value
|
||
if (decoder->header.entropy_coder == 1) {
|
||
// EZBC format (stub implementation)
|
||
postprocess_coefficients_ezbc(ptr, coeff_count, quantised_y, quantised_co, quantised_cg,
|
||
decoder->header.channel_layout);
|
||
} else {
|
||
// Default: Twobitmap format (entropy_coder=0)
|
||
postprocess_coefficients_twobit(ptr, coeff_count, quantised_y, quantised_co, quantised_cg);
|
||
}
|
||
|
||
// Debug: Check first few coefficients
|
||
// if (decoder->frame_count == 32) {
|
||
// fprintf(stderr, " First 10 quantised Y coeffs: ");
|
||
// for (int i = 0; i < 10 && i < coeff_count; i++) {
|
||
// fprintf(stderr, "%d ", quantised_y[i]);
|
||
// }
|
||
// fprintf(stderr, "\n");
|
||
//
|
||
// Check for any large quantised values that should produce bright pixels
|
||
// int max_quant_y = 0;
|
||
// for (int i = 0; i < coeff_count; i++) {
|
||
// int abs_val = quantised_y[i] < 0 ? -quantised_y[i] : quantised_y[i];
|
||
// if (abs_val > max_quant_y) max_quant_y = abs_val;
|
||
// }
|
||
// fprintf(stderr, " Max quantised Y coefficient: %d\n", max_quant_y);
|
||
// }
|
||
|
||
// Dequantise (perceptual for versions 5-8, uniform for 1-4)
|
||
const int is_perceptual = (decoder->header.version >= 5 && decoder->header.version <= 8);
|
||
const int is_ezbc = (decoder->header.entropy_coder == 1);
|
||
|
||
if (is_ezbc && is_perceptual) {
|
||
// EZBC mode with perceptual quantisation: coefficients are normalised
|
||
// Need to dequantise using perceptual weights (same as twobit-map mode)
|
||
dequantise_dwt_subbands_perceptual(0, qy, quantised_y, decoder->dwt_buffer_y,
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, qy, 0, decoder->frame_count);
|
||
dequantise_dwt_subbands_perceptual(0, qy, quantised_co, decoder->dwt_buffer_co,
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, qco, 1, decoder->frame_count);
|
||
dequantise_dwt_subbands_perceptual(0, qy, quantised_cg, decoder->dwt_buffer_cg,
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, qcg, 1, decoder->frame_count);
|
||
} else if (is_perceptual) {
|
||
dequantise_dwt_subbands_perceptual(0, qy, quantised_y, decoder->dwt_buffer_y,
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, qy, 0, decoder->frame_count);
|
||
|
||
// Debug: Check if values survived the function call
|
||
// if (decoder->frame_count == 32) {
|
||
// fprintf(stderr, " RIGHT AFTER dequantise_Y returns: first 5 values: %.1f %.1f %.1f %.1f %.1f\n",
|
||
// decoder->dwt_buffer_y[0], decoder->dwt_buffer_y[1], decoder->dwt_buffer_y[2],
|
||
// decoder->dwt_buffer_y[3], decoder->dwt_buffer_y[4]);
|
||
// }
|
||
|
||
dequantise_dwt_subbands_perceptual(0, qy, quantised_co, decoder->dwt_buffer_co,
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, qco, 1, decoder->frame_count);
|
||
dequantise_dwt_subbands_perceptual(0, qy, quantised_cg, decoder->dwt_buffer_cg,
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, qcg, 1, decoder->frame_count);
|
||
} else {
|
||
for (int i = 0; i < coeff_count; i++) {
|
||
decoder->dwt_buffer_y[i] = quantised_y[i] * qy;
|
||
decoder->dwt_buffer_co[i] = quantised_co[i] * qco;
|
||
decoder->dwt_buffer_cg[i] = quantised_cg[i] * qcg;
|
||
}
|
||
}
|
||
|
||
// Debug: Check dequantised values using correct subband layout
|
||
// if (decoder->frame_count == 32) {
|
||
// dwt_subband_info_t subbands[32];
|
||
// const int subband_count = calculate_subband_layout(decoder->header.width, decoder->header.height,
|
||
// decoder->header.decomp_levels, subbands);
|
||
//
|
||
// Find LL band (highest level, type 0)
|
||
// for (int s = 0; s < subband_count; s++) {
|
||
// if (subbands[s].level == decoder->header.decomp_levels && subbands[s].subband_type == 0) {
|
||
// fprintf(stderr, " LL band: level=%d, start=%d, count=%d\n",
|
||
// subbands[s].level, subbands[s].coeff_start, subbands[s].coeff_count);
|
||
// fprintf(stderr, " Reading LL first 5 from dwt_buffer_y[0-4]: %.1f %.1f %.1f %.1f %.1f\n",
|
||
// decoder->dwt_buffer_y[0], decoder->dwt_buffer_y[1], decoder->dwt_buffer_y[2],
|
||
// decoder->dwt_buffer_y[3], decoder->dwt_buffer_y[4]);
|
||
//
|
||
// Find max in CORRECT LL band
|
||
// float max_ll = -999.0f;
|
||
// for (int i = 0; i < subbands[s].coeff_count; i++) {
|
||
// int idx = subbands[s].coeff_start + i;
|
||
// if (decoder->dwt_buffer_y[idx] > max_ll) max_ll = decoder->dwt_buffer_y[idx];
|
||
// }
|
||
// fprintf(stderr, " Max LL coefficient BEFORE grain removal: %.1f\n", max_ll);
|
||
// break;
|
||
// }
|
||
// }
|
||
// }
|
||
|
||
// Remove grain synthesis from Y channel (must happen after dequantisation, before inverse DWT)
|
||
remove_grain_synthesis_decoder(decoder->dwt_buffer_y, decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, decoder->frame_count, decoder->header.quantiser_y);
|
||
|
||
// Debug: Check LL band AFTER grain removal
|
||
// if (decoder->frame_count == 32) {
|
||
// int ll_width = decoder->header.width;
|
||
// int ll_height = decoder->header.height;
|
||
// for (int l = 0; l < decoder->header.decomp_levels; l++) {
|
||
// ll_width = (ll_width + 1) / 2;
|
||
// ll_height = (ll_height + 1) / 2;
|
||
// }
|
||
// float max_ll = -999.0f;
|
||
// for (int i = 0; i < ll_width * ll_height; i++) {
|
||
// if (decoder->dwt_buffer_y[i] > max_ll) max_ll = decoder->dwt_buffer_y[i];
|
||
// }
|
||
// fprintf(stderr, " Max LL coefficient AFTER grain removal: %.1f\n", max_ll);
|
||
// }
|
||
|
||
// Apply inverse DWT with correct non-power-of-2 dimension handling
|
||
// Note: quantised arrays freed at write_frame label
|
||
apply_inverse_dwt_multilevel(decoder->dwt_buffer_y, decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, decoder->header.wavelet_filter);
|
||
apply_inverse_dwt_multilevel(decoder->dwt_buffer_co, decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, decoder->header.wavelet_filter);
|
||
apply_inverse_dwt_multilevel(decoder->dwt_buffer_cg, decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, decoder->header.wavelet_filter);
|
||
|
||
// Debug: Check spatial domain values after IDWT
|
||
// if (decoder->frame_count == 32) {
|
||
// float max_y_spatial = -999.0f;
|
||
// for (int i = 0; i < decoder->frame_size; i++) {
|
||
// if (decoder->dwt_buffer_y[i] > max_y_spatial) max_y_spatial = decoder->dwt_buffer_y[i];
|
||
// }
|
||
// fprintf(stderr, " Max Y in spatial domain AFTER IDWT: %.1f\n", max_y_spatial);
|
||
// }
|
||
|
||
// Debug: Check spatial domain values after IDWT (original debug)
|
||
// if (decoder->frame_count < 1) {
|
||
// fprintf(stderr, " After IDWT - First 10 Y values: ");
|
||
// for (int i = 0; i < 10 && i < decoder->frame_size; i++) {
|
||
// fprintf(stderr, "%.1f ", decoder->dwt_buffer_y[i]);
|
||
// }
|
||
// fprintf(stderr, "\n");
|
||
// fprintf(stderr, " Y range: min=%.1f, max=%.1f\n",
|
||
// decoder->dwt_buffer_y[0], decoder->dwt_buffer_y[decoder->frame_size-1]);
|
||
// }
|
||
|
||
// Handle P-frame delta accumulation (in YCoCg float space)
|
||
if (packet_type == TAV_PACKET_PFRAME && mode == TAV_MODE_DELTA) {
|
||
for (int i = 0; i < decoder->frame_size; i++) {
|
||
decoder->dwt_buffer_y[i] += decoder->reference_ycocg_y[i];
|
||
decoder->dwt_buffer_co[i] += decoder->reference_ycocg_co[i];
|
||
decoder->dwt_buffer_cg[i] += decoder->reference_ycocg_cg[i];
|
||
}
|
||
}
|
||
|
||
// Convert YCoCg-R/ICtCp to RGB
|
||
const int is_ictcp = (decoder->header.version % 2 == 0);
|
||
float max_y = -999, max_co = -999, max_cg = -999;
|
||
int max_r = 0, max_g = 0, max_b = 0;
|
||
|
||
for (int i = 0; i < decoder->frame_size; i++) {
|
||
uint8_t r, g, b;
|
||
if (is_ictcp) {
|
||
ictcp_to_rgb(decoder->dwt_buffer_y[i],
|
||
decoder->dwt_buffer_co[i],
|
||
decoder->dwt_buffer_cg[i], &r, &g, &b);
|
||
} else {
|
||
ycocg_r_to_rgb(decoder->dwt_buffer_y[i],
|
||
decoder->dwt_buffer_co[i],
|
||
decoder->dwt_buffer_cg[i], &r, &g, &b);
|
||
}
|
||
|
||
// Track max values for debugging
|
||
// if (decoder->frame_count == 1000) {
|
||
// if (decoder->dwt_buffer_y[i] > max_y) max_y = decoder->dwt_buffer_y[i];
|
||
// if (decoder->dwt_buffer_co[i] > max_co) max_co = decoder->dwt_buffer_co[i];
|
||
// if (decoder->dwt_buffer_cg[i] > max_cg) max_cg = decoder->dwt_buffer_cg[i];
|
||
// if (r > max_r) max_r = r;
|
||
// if (g > max_g) max_g = g;
|
||
// if (b > max_b) max_b = b;
|
||
// }
|
||
|
||
// RGB byte order for FFmpeg rgb24
|
||
decoder->current_frame_rgb[i * 3 + 0] = r;
|
||
decoder->current_frame_rgb[i * 3 + 1] = g;
|
||
decoder->current_frame_rgb[i * 3 + 2] = b;
|
||
}
|
||
|
||
// if (decoder->frame_count == 1000) {
|
||
// fprintf(stderr, "\n=== Frame 1000 Value Analysis ===\n");
|
||
// fprintf(stderr, "Max YCoCg values: Y=%.1f, Co=%.1f, Cg=%.1f\n", max_y, max_co, max_cg);
|
||
// fprintf(stderr, "Max RGB values: R=%d, G=%d, B=%d\n", max_r, max_g, max_b);
|
||
// }
|
||
|
||
// Debug: Check RGB output
|
||
// if (decoder->frame_count < 1) {
|
||
// fprintf(stderr, " First 5 pixels RGB: ");
|
||
// for (int i = 0; i < 5 && i < decoder->frame_size; i++) {
|
||
// fprintf(stderr, "(%d,%d,%d) ",
|
||
// decoder->current_frame_rgb[i*3],
|
||
// decoder->current_frame_rgb[i*3+1],
|
||
// decoder->current_frame_rgb[i*3+2]);
|
||
// }
|
||
// fprintf(stderr, "\n");
|
||
// }
|
||
|
||
// Update reference YCoCg frame
|
||
memcpy(decoder->reference_ycocg_y, decoder->dwt_buffer_y, decoder->frame_size * sizeof(float));
|
||
memcpy(decoder->reference_ycocg_co, decoder->dwt_buffer_co, decoder->frame_size * sizeof(float));
|
||
memcpy(decoder->reference_ycocg_cg, decoder->dwt_buffer_cg, decoder->frame_size * sizeof(float));
|
||
}
|
||
|
||
// Update reference frame
|
||
memcpy(decoder->reference_frame_rgb, decoder->current_frame_rgb, decoder->frame_size * 3);
|
||
|
||
write_frame:
|
||
// Clean up temporary allocations
|
||
if (compressed_data) free(compressed_data);
|
||
if (decompressed_data) free(decompressed_data);
|
||
if (quantised_y) free(quantised_y);
|
||
if (quantised_co) free(quantised_co);
|
||
if (quantised_cg) free(quantised_cg);
|
||
|
||
// If decoding failed, fill frame with black to maintain stream alignment
|
||
if (!decode_success) {
|
||
memset(decoder->current_frame_rgb, 0, decoder->frame_size * 3);
|
||
fprintf(stderr, "Warning: Writing black frame %d due to decode error\n", decoder->frame_count);
|
||
}
|
||
|
||
// Write frame to video pipe with retry on partial writes (ALWAYS write to maintain alignment)
|
||
size_t bytes_to_write = decoder->frame_size * 3;
|
||
size_t total_written = 0;
|
||
const uint8_t *write_ptr = decoder->current_frame_rgb;
|
||
|
||
while (total_written < bytes_to_write) {
|
||
size_t bytes_written = fwrite(write_ptr + total_written, 1,
|
||
bytes_to_write - total_written,
|
||
decoder->video_pipe);
|
||
if (bytes_written == 0) {
|
||
if (ferror(decoder->video_pipe)) {
|
||
fprintf(stderr, "Error: Pipe write error at frame %d (wrote %zu/%zu bytes) - aborting\n",
|
||
decoder->frame_count, total_written, bytes_to_write);
|
||
// Cannot maintain stream alignment if pipe is broken - this is fatal
|
||
return -1;
|
||
}
|
||
// Pipe might be full, flush and retry
|
||
fflush(decoder->video_pipe);
|
||
usleep(1000); // 1ms delay
|
||
} else {
|
||
total_written += bytes_written;
|
||
}
|
||
}
|
||
|
||
// Ensure data is flushed to FFmpeg
|
||
if (fflush(decoder->video_pipe) != 0) {
|
||
fprintf(stderr, "Error: Failed to flush video pipe at frame %d - aborting\n", decoder->frame_count);
|
||
// Cannot maintain stream alignment if pipe is broken - this is fatal
|
||
return -1;
|
||
}
|
||
|
||
decoder->frame_count++;
|
||
// Return success only if decoding succeeded; still return 1 to continue processing
|
||
// (we wrote a frame either way to maintain stream alignment)
|
||
return decode_success ? 1 : 1; // Always return 1 to continue, errors are non-fatal now
|
||
}
|
||
|
||
//=============================================================================
|
||
// Main Decoding Loop
|
||
//=============================================================================
|
||
|
||
static void print_usage(const char *prog) {
|
||
printf("TAV Decoder - Converts TAV video to FFV1+PCMu8 in MKV container\n");
|
||
printf("Version: %s\n\n", DECODER_VENDOR_STRING);
|
||
printf("Usage: %s -i input.tav -o output.mkv\n\n", prog);
|
||
printf("Options:\n");
|
||
printf(" -i <file> Input TAV file\n");
|
||
printf(" -o <file> Output MKV file (FFV1 video + PCMu8 audio)\n");
|
||
printf(" -v Verbose output\n");
|
||
printf(" -h, --help Show this help\n\n");
|
||
printf("Supported features (matches TSVM decoder):\n");
|
||
printf(" - I-frames and P-frames (delta mode)\n");
|
||
printf(" - GOP unified 3D DWT (temporal compression)\n");
|
||
printf(" - TAD audio (decoded to PCMu8)\n");
|
||
printf(" - MP2 audio (passed through)\n");
|
||
printf(" - All wavelet types (5/3, 9/7, CDF 13/7, DD-4, Haar)\n");
|
||
printf(" - Perceptual quantisation (versions 5-8)\n");
|
||
printf(" - YCoCg-R and ICtCp color spaces\n\n");
|
||
printf("Unsupported features (not in TSVM decoder):\n");
|
||
printf(" - MC-EZBC motion compensation\n");
|
||
printf(" - MPEG-style residual coding (P/B-frames)\n");
|
||
printf(" - Adaptive block partitioning\n\n");
|
||
}
|
||
|
||
int main(int argc, char *argv[]) {
|
||
// Ignore SIGPIPE to prevent process termination if FFmpeg exits early
|
||
signal(SIGPIPE, SIG_IGN);
|
||
|
||
char *input_file = NULL;
|
||
char *output_file = NULL;
|
||
int verbose = 0;
|
||
|
||
static struct option long_options[] = {
|
||
{"help", no_argument, 0, 'h'},
|
||
{0, 0, 0, 0}
|
||
};
|
||
|
||
int opt;
|
||
while ((opt = getopt_long(argc, argv, "i:o:vh", long_options, NULL)) != -1) {
|
||
switch (opt) {
|
||
case 'i':
|
||
input_file = optarg;
|
||
break;
|
||
case 'o':
|
||
output_file = optarg;
|
||
break;
|
||
case 'v':
|
||
verbose = 1;
|
||
break;
|
||
case 'h':
|
||
print_usage(argv[0]);
|
||
return 0;
|
||
default:
|
||
print_usage(argv[0]);
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
if (!input_file || !output_file) {
|
||
fprintf(stderr, "Error: Both input and output files are required\n\n");
|
||
print_usage(argv[0]);
|
||
return 1;
|
||
}
|
||
|
||
// Create temporary audio file path
|
||
char temp_audio_file[256];
|
||
snprintf(temp_audio_file, sizeof(temp_audio_file), "/tmp/tav_audio_%d.wav", getpid());
|
||
|
||
// Pass 1: Extract audio to WAV file
|
||
if (extract_audio_to_wav(input_file, temp_audio_file, verbose) < 0) {
|
||
fprintf(stderr, "Failed to extract audio\n");
|
||
unlink(temp_audio_file); // Clean up temp file if it exists
|
||
return 1;
|
||
}
|
||
|
||
// Pass 2: Decode video with audio file
|
||
tav_decoder_t *decoder = tav_decoder_init(input_file, output_file, temp_audio_file);
|
||
if (!decoder) {
|
||
fprintf(stderr, "Failed to initialise decoder\n");
|
||
unlink(temp_audio_file); // Clean up temp file
|
||
return 1;
|
||
}
|
||
|
||
if (verbose) {
|
||
printf("TAV Decoder - %dx%d @ %dfps\n", decoder->header.width, decoder->header.height, decoder->header.fps);
|
||
printf("Wavelet: %s, Levels: %d\n",
|
||
decoder->header.wavelet_filter == 0 ? "5/3" :
|
||
decoder->header.wavelet_filter == 1 ? "9/7" :
|
||
decoder->header.wavelet_filter == 2 ? "CDF 13/7" :
|
||
decoder->header.wavelet_filter == 16 ? "DD-4" :
|
||
decoder->header.wavelet_filter == 255 ? "Haar" : "Unknown",
|
||
decoder->header.decomp_levels);
|
||
printf("Version: %d (%s, %s)\n", decoder->header.version,
|
||
decoder->header.version % 2 == 0 ? "ICtCp" : "YCoCg-R",
|
||
decoder->is_monoblock ? "monoblock" : "tiled");
|
||
printf("Output: %s (FFV1 level 3 + PCMu8 @ 32 KHz)\n", output_file);
|
||
}
|
||
|
||
// Main decoding loop
|
||
int result = 1;
|
||
int total_packets = 0;
|
||
int iframe_count = 0;
|
||
while (result > 0) {
|
||
// Check file position before reading packet
|
||
long file_pos = ftell(decoder->input_fp);
|
||
|
||
uint8_t packet_type;
|
||
if (fread(&packet_type, 1, 1, decoder->input_fp) != 1) {
|
||
if (verbose) {
|
||
fprintf(stderr, "Reached EOF at file position %ld after %d packets\n", file_pos, total_packets);
|
||
}
|
||
result = 0; // EOF
|
||
break;
|
||
}
|
||
|
||
total_packets++;
|
||
|
||
if (verbose && total_packets <= 30) {
|
||
fprintf(stderr, "Packet %d at file pos %ld: Type 0x%02X\n", total_packets, file_pos, packet_type);
|
||
}
|
||
|
||
// Handle sync packets (no size field)
|
||
if (packet_type == TAV_PACKET_SYNC || packet_type == TAV_PACKET_SYNC_NTSC) {
|
||
if (verbose && total_packets < 20) {
|
||
fprintf(stderr, "Packet %d: SYNC (0x%02X)\n", total_packets, packet_type);
|
||
}
|
||
continue;
|
||
}
|
||
|
||
// Handle timecode packets (no size field, just 8 bytes of uint64 timecode)
|
||
if (packet_type == TAV_PACKET_TIMECODE) {
|
||
uint64_t timecode_ns;
|
||
if (fread(&timecode_ns, 8, 1, decoder->input_fp) != 1) {
|
||
fprintf(stderr, "Error: Failed to read timecode\n");
|
||
result = -1;
|
||
break;
|
||
}
|
||
if (verbose && total_packets < 20) {
|
||
double timecode_sec = timecode_ns / 1000000000.0;
|
||
fprintf(stderr, "Packet %d: TIMECODE (0x%02X) - %.6f seconds\n",
|
||
total_packets, packet_type, timecode_sec);
|
||
}
|
||
continue;
|
||
}
|
||
|
||
// Handle GOP sync packets (no size field, just 1 byte frame count)
|
||
if (packet_type == TAV_PACKET_GOP_SYNC) {
|
||
uint8_t gop_frame_count;
|
||
if (fread(&gop_frame_count, 1, 1, decoder->input_fp) != 1) {
|
||
fprintf(stderr, "Error: Failed to read GOP sync frame count\n");
|
||
result = -1;
|
||
break;
|
||
}
|
||
if (verbose) {
|
||
fprintf(stderr, "Packet %d: GOP_SYNC (0x%02X) - %u frames from GOP\n",
|
||
total_packets, packet_type, gop_frame_count);
|
||
}
|
||
// Update decoder frame count (GOP already wrote frames)
|
||
decoder->frame_count += gop_frame_count;
|
||
continue;
|
||
}
|
||
|
||
// Handle GOP unified packets (custom format: 1-byte gop_size + 4-byte compressed_size)
|
||
if (packet_type == TAV_PACKET_GOP_UNIFIED) {
|
||
uint8_t gop_size;
|
||
uint32_t compressed_size;
|
||
if (fread(&gop_size, 1, 1, decoder->input_fp) != 1 ||
|
||
fread(&compressed_size, 4, 1, decoder->input_fp) != 1) {
|
||
fprintf(stderr, "Error: Failed to read GOP unified packet header\n");
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
if (verbose) {
|
||
fprintf(stderr, "Packet %d: GOP_UNIFIED (0x%02X), %u frames, %u bytes\n",
|
||
total_packets, packet_type, gop_size, compressed_size);
|
||
}
|
||
|
||
// Read compressed GOP data
|
||
uint8_t *compressed_data = malloc(compressed_size);
|
||
if (!compressed_data) {
|
||
fprintf(stderr, "Error: Failed to allocate GOP compressed buffer (%u bytes)\n", compressed_size);
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
if (fread(compressed_data, 1, compressed_size, decoder->input_fp) != compressed_size) {
|
||
fprintf(stderr, "Error: Failed to read GOP compressed data\n");
|
||
free(compressed_data);
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
// Decompress with Zstd
|
||
const size_t decompressed_bound = ZSTD_getFrameContentSize(compressed_data, compressed_size);
|
||
if (decompressed_bound == ZSTD_CONTENTSIZE_ERROR || decompressed_bound == ZSTD_CONTENTSIZE_UNKNOWN) {
|
||
fprintf(stderr, "Error: Invalid Zstd frame in GOP data\n");
|
||
free(compressed_data);
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
uint8_t *decompressed_data = malloc(decompressed_bound);
|
||
if (!decompressed_data) {
|
||
fprintf(stderr, "Error: Failed to allocate GOP decompressed buffer (%zu bytes)\n", decompressed_bound);
|
||
free(compressed_data);
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
const size_t decompressed_size = ZSTD_decompress(decompressed_data, decompressed_bound,
|
||
compressed_data, compressed_size);
|
||
free(compressed_data);
|
||
|
||
if (ZSTD_isError(decompressed_size)) {
|
||
fprintf(stderr, "Error: Zstd decompression failed: %s\n", ZSTD_getErrorName(decompressed_size));
|
||
free(decompressed_data);
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
// Postprocess coefficients based on entropy_coder value
|
||
const int num_pixels = decoder->header.width * decoder->header.height;
|
||
int16_t ***quantised_gop;
|
||
|
||
if (decoder->header.entropy_coder == 2) {
|
||
// RAW format: simple concatenated int16 arrays
|
||
if (verbose) {
|
||
fprintf(stderr, " Using RAW postprocessing (entropy_coder=2)\n");
|
||
}
|
||
quantised_gop = postprocess_gop_raw(decompressed_data, decompressed_size,
|
||
gop_size, num_pixels, decoder->header.channel_layout);
|
||
} else if (decoder->header.entropy_coder == 1) {
|
||
// EZBC format: embedded zero-block coding
|
||
if (verbose) {
|
||
fprintf(stderr, " Using EZBC postprocessing (entropy_coder=1)\n");
|
||
}
|
||
quantised_gop = postprocess_gop_ezbc(decompressed_data, decompressed_size,
|
||
gop_size, num_pixels, decoder->header.channel_layout);
|
||
} else {
|
||
// Default: Twobitmap format (entropy_coder=0)
|
||
if (verbose) {
|
||
fprintf(stderr, " Using Twobitmap postprocessing (entropy_coder=0)\n");
|
||
}
|
||
quantised_gop = postprocess_gop_unified(decompressed_data, decompressed_size,
|
||
gop_size, num_pixels, decoder->header.channel_layout);
|
||
}
|
||
|
||
free(decompressed_data);
|
||
|
||
if (!quantised_gop) {
|
||
fprintf(stderr, "Error: Failed to postprocess GOP data\n");
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
// Allocate GOP float buffers
|
||
float **gop_y = malloc(gop_size * sizeof(float *));
|
||
float **gop_co = malloc(gop_size * sizeof(float *));
|
||
float **gop_cg = malloc(gop_size * sizeof(float *));
|
||
|
||
for (int t = 0; t < gop_size; t++) {
|
||
gop_y[t] = calloc(num_pixels, sizeof(float));
|
||
gop_co[t] = calloc(num_pixels, sizeof(float));
|
||
gop_cg[t] = calloc(num_pixels, sizeof(float));
|
||
}
|
||
|
||
// Dequantise with temporal scaling (perceptual quantisation for versions 5-8)
|
||
const int is_perceptual = (decoder->header.version >= 5 && decoder->header.version <= 8);
|
||
const int is_ezbc = (decoder->header.entropy_coder == 1);
|
||
const int temporal_levels = 2; // Fixed for TAV GOP encoding
|
||
|
||
for (int t = 0; t < gop_size; t++) {
|
||
if (is_ezbc && is_perceptual) {
|
||
// EZBC mode with perceptual quantisation: coefficients are normalised
|
||
// Need to dequantise using perceptual weights (same as twobit-map mode)
|
||
const int temporal_level = get_temporal_subband_level(t, gop_size, temporal_levels);
|
||
const float temporal_scale = get_temporal_quantiser_scale(temporal_level);
|
||
|
||
// FIX: Use QLUT to convert header quantiser indices to actual values
|
||
const float base_q_y = roundf(QLUT[decoder->header.quantiser_y] * temporal_scale);
|
||
const float base_q_co = roundf(QLUT[decoder->header.quantiser_co] * temporal_scale);
|
||
const float base_q_cg = roundf(QLUT[decoder->header.quantiser_cg] * temporal_scale);
|
||
|
||
dequantise_dwt_subbands_perceptual(0, QLUT[decoder->header.quantiser_y],
|
||
quantised_gop[t][0], gop_y[t],
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, base_q_y, 0, decoder->frame_count + t);
|
||
dequantise_dwt_subbands_perceptual(0, QLUT[decoder->header.quantiser_y],
|
||
quantised_gop[t][1], gop_co[t],
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, base_q_co, 1, decoder->frame_count + t);
|
||
dequantise_dwt_subbands_perceptual(0, QLUT[decoder->header.quantiser_y],
|
||
quantised_gop[t][2], gop_cg[t],
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, base_q_cg, 1, decoder->frame_count + t);
|
||
|
||
if (t == 0 && verbose) {
|
||
// Debug: Check multiple LL values
|
||
fprintf(stderr, "[GOP-EZBC] Frame 0 after dequant:\n");
|
||
fprintf(stderr, " Quantised: LL[0]=%d, LL[1]=%d, LL[2]=%d\n",
|
||
quantised_gop[t][0][0], quantised_gop[t][0][1], quantised_gop[t][0][2]);
|
||
fprintf(stderr, " Dequantised: LL[0]=%.1f, LL[1]=%.1f, LL[2]=%.1f\n",
|
||
gop_y[t][0], gop_y[t][1], gop_y[t][2]);
|
||
fprintf(stderr, " base_q_y=%.1f, temporal_level=%d, temporal_scale=%.3f\n",
|
||
base_q_y, temporal_level, temporal_scale);
|
||
}
|
||
} else if (!is_ezbc) {
|
||
// Normal mode: multiply by quantiser
|
||
const int temporal_level = get_temporal_subband_level(t, gop_size, temporal_levels);
|
||
const float temporal_scale = get_temporal_quantiser_scale(temporal_level);
|
||
|
||
// CRITICAL: Must ROUND temporal quantiser to match encoder's roundf() behavior
|
||
// FIX: Use QLUT to convert header quantiser indices to actual values
|
||
const float base_q_y = roundf(QLUT[decoder->header.quantiser_y] * temporal_scale);
|
||
const float base_q_co = roundf(QLUT[decoder->header.quantiser_co] * temporal_scale);
|
||
const float base_q_cg = roundf(QLUT[decoder->header.quantiser_cg] * temporal_scale);
|
||
|
||
if (is_perceptual) {
|
||
dequantise_dwt_subbands_perceptual(0, QLUT[decoder->header.quantiser_y],
|
||
quantised_gop[t][0], gop_y[t],
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, base_q_y, 0, decoder->frame_count + t);
|
||
dequantise_dwt_subbands_perceptual(0, QLUT[decoder->header.quantiser_y],
|
||
quantised_gop[t][1], gop_co[t],
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, base_q_co, 1, decoder->frame_count + t);
|
||
dequantise_dwt_subbands_perceptual(0, QLUT[decoder->header.quantiser_y],
|
||
quantised_gop[t][2], gop_cg[t],
|
||
decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, base_q_cg, 1, decoder->frame_count + t);
|
||
} else {
|
||
// Uniform quantisation for older versions
|
||
for (int i = 0; i < num_pixels; i++) {
|
||
gop_y[t][i] = quantised_gop[t][0][i] * base_q_y;
|
||
gop_co[t][i] = quantised_gop[t][1][i] * base_q_co;
|
||
gop_cg[t][i] = quantised_gop[t][2][i] * base_q_cg;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// Free quantised coefficients
|
||
for (int t = 0; t < gop_size; t++) {
|
||
free(quantised_gop[t][0]);
|
||
free(quantised_gop[t][1]);
|
||
free(quantised_gop[t][2]);
|
||
free(quantised_gop[t]);
|
||
}
|
||
free(quantised_gop);
|
||
|
||
// FIX: Disable grain removal for GOP frames to prevent frame-varying artifacts (blips)
|
||
// Grain removal in DWT coefficient space causes inconsistent results across GOP frames
|
||
// The Kotlin decoder may have a different implementation that avoids this issue
|
||
// TODO: Investigate correct grain removal for temporal DWT GOP frames
|
||
/*
|
||
for (int t = 0; t < gop_size; t++) {
|
||
remove_grain_synthesis_decoder(gop_y[t], decoder->header.width, decoder->header.height,
|
||
decoder->header.decomp_levels, decoder->frame_count + t,
|
||
decoder->header.quantiser_y);
|
||
}
|
||
*/
|
||
|
||
// Apply inverse 3D DWT (spatial + temporal)
|
||
apply_inverse_3d_dwt(gop_y, gop_co, gop_cg, decoder->header.width, decoder->header.height,
|
||
gop_size, decoder->header.decomp_levels, temporal_levels,
|
||
decoder->header.wavelet_filter);
|
||
|
||
// Debug: Check Y values after inverse DWT
|
||
if (verbose && decoder->frame_count == 0) {
|
||
fprintf(stderr, "[GOP-DEBUG] After inverse 3D DWT: Frame 0 Y[0]=%.1f, Y[1]=%.1f, Y[2]=%.1f\n",
|
||
gop_y[0][0], gop_y[0][1], gop_y[0][2]);
|
||
}
|
||
|
||
// Debug: Check spatial coefficients after inverse temporal DWT (before inverse spatial DWT)
|
||
// if (is_ezbc) {
|
||
// float max_y = 0.0f, min_y = 0.0f;
|
||
// for (int i = 0; i < num_pixels; i++) {
|
||
// if (gop_y[0][i] > max_y) max_y = gop_y[0][i];
|
||
// if (gop_y[0][i] < min_y) min_y = gop_y[0][i];
|
||
// }
|
||
// fprintf(stderr, "[GOP-EZBC] After inverse temporal DWT, Frame 0 Y spatial coeffs range: [%.1f, %.1f], first 5: %.1f %.1f %.1f %.1f %.1f\n",
|
||
// min_y, max_y,
|
||
// gop_y[0][0], gop_y[0][1], gop_y[0][2], gop_y[0][3], gop_y[0][4]);
|
||
// }
|
||
|
||
// Convert YCoCg→RGB and write all GOP frames
|
||
const int is_ictcp = (decoder->header.version % 2 == 0);
|
||
|
||
// DEBUG: Print frame size calculation
|
||
// if (decoder->frame_count == 0) {
|
||
// fprintf(stderr, "[DEBUG] decoder->frame_size=%d, decoder->header.width=%d, decoder->header.height=%d\n",
|
||
// decoder->frame_size, decoder->header.width, decoder->header.height);
|
||
// fprintf(stderr, "[DEBUG] bytes_to_write=%zu (should be %d)\n",
|
||
// (size_t)decoder->frame_size * 3, decoder->header.width * decoder->header.height * 3);
|
||
// }
|
||
|
||
for (int t = 0; t < gop_size; t++) {
|
||
// Allocate frame buffer
|
||
uint8_t *frame_rgb = malloc(decoder->frame_size * 3);
|
||
if (!frame_rgb) {
|
||
fprintf(stderr, "Error: Failed to allocate GOP frame buffer\n");
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
// Convert to RGB
|
||
for (int i = 0; i < decoder->frame_size; i++) {
|
||
uint8_t r, g, b;
|
||
if (is_ictcp) {
|
||
ictcp_to_rgb(gop_y[t][i], gop_co[t][i], gop_cg[t][i], &r, &g, &b);
|
||
} else {
|
||
ycocg_r_to_rgb(gop_y[t][i], gop_co[t][i], gop_cg[t][i], &r, &g, &b);
|
||
}
|
||
frame_rgb[i * 3 + 0] = r;
|
||
frame_rgb[i * 3 + 1] = g;
|
||
frame_rgb[i * 3 + 2] = b;
|
||
}
|
||
|
||
// Write frame to FFmpeg video pipe
|
||
const size_t bytes_to_write = decoder->frame_size * 3;
|
||
|
||
// DEBUG: Verify we're writing to correct pipe
|
||
// if (decoder->frame_count == 0 && t == 0) {
|
||
// fprintf(stderr, "[DEBUG] Writing frame to video_pipe=%p, bytes_to_write=%zu\n",
|
||
// (void*)decoder->video_pipe, bytes_to_write);
|
||
// fprintf(stderr, "[DEBUG] First 10 RGB bytes: %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n",
|
||
// frame_rgb[0], frame_rgb[1], frame_rgb[2], frame_rgb[3], frame_rgb[4],
|
||
// frame_rgb[5], frame_rgb[6], frame_rgb[7], frame_rgb[8], frame_rgb[9]);
|
||
// }
|
||
|
||
const size_t bytes_written = fwrite(frame_rgb, 1, bytes_to_write, decoder->video_pipe);
|
||
if (bytes_written != bytes_to_write) {
|
||
fprintf(stderr, "Error: Failed to write GOP frame %d to FFmpeg (wrote %zu/%zu bytes)\n",
|
||
t, bytes_written, bytes_to_write);
|
||
free(frame_rgb);
|
||
result = -1;
|
||
break;
|
||
}
|
||
fflush(decoder->video_pipe);
|
||
|
||
free(frame_rgb);
|
||
}
|
||
|
||
// Free GOP buffers
|
||
for (int t = 0; t < gop_size; t++) {
|
||
free(gop_y[t]);
|
||
free(gop_co[t]);
|
||
free(gop_cg[t]);
|
||
}
|
||
free(gop_y);
|
||
free(gop_co);
|
||
free(gop_cg);
|
||
|
||
// BUGFIX: Only break on error (result < 0), not on success (result = 1)
|
||
if (result < 0) break;
|
||
|
||
// GOP decoding doesn't update frame_count here - GOP_SYNC packet will do it
|
||
if (verbose) {
|
||
long pos_after_gop = ftell(decoder->input_fp);
|
||
fprintf(stderr, "[DEBUG] After GOP: file pos = %ld, %d frames written (waiting for GOP_SYNC)\n",
|
||
pos_after_gop, gop_size);
|
||
}
|
||
|
||
continue;
|
||
}
|
||
|
||
// Handle TAD audio packets (already extracted in Pass 1, just skip)
|
||
if (packet_type == TAV_PACKET_AUDIO_TAD) {
|
||
uint16_t sample_count_wrapper;
|
||
uint32_t payload_size_plus_7;
|
||
fread(&sample_count_wrapper, 2, 1, decoder->input_fp);
|
||
fread(&payload_size_plus_7, 4, 1, decoder->input_fp);
|
||
|
||
// Skip TAD chunk (payload_size_plus_7 includes header and data)
|
||
fseek(decoder->input_fp, payload_size_plus_7, SEEK_CUR);
|
||
continue;
|
||
}
|
||
|
||
// Handle extended header (has 2-byte count, not 4-byte size)
|
||
if (packet_type == TAV_PACKET_EXTENDED_HDR) {
|
||
uint16_t num_pairs;
|
||
if (fread(&num_pairs, 2, 1, decoder->input_fp) != 1) {
|
||
fprintf(stderr, "Error: Failed to read extended header count\n");
|
||
result = -1;
|
||
break;
|
||
}
|
||
if (verbose && total_packets < 20) {
|
||
fprintf(stderr, "Packet %d: EXTENDED_HDR (0x%02X), %u pairs - skipping\n",
|
||
total_packets, packet_type, num_pairs);
|
||
}
|
||
// Skip the key-value pairs
|
||
// Format: each pair is [4-byte key][1-byte type][N-byte value]
|
||
// We need to parse each pair to know its size
|
||
for (int i = 0; i < num_pairs; i++) {
|
||
uint8_t key[4];
|
||
uint8_t value_type;
|
||
if (fread(key, 1, 4, decoder->input_fp) != 4 ||
|
||
fread(&value_type, 1, 1, decoder->input_fp) != 1) {
|
||
fprintf(stderr, "Error: Failed to read extended header pair %d\n", i);
|
||
result = -1;
|
||
break;
|
||
}
|
||
// Determine value size based on type
|
||
size_t value_size = 0;
|
||
switch (value_type) {
|
||
case 0x00: value_size = 2; break; // Int16
|
||
case 0x01: value_size = 3; break; // Int24
|
||
case 0x02: value_size = 4; break; // Int32
|
||
case 0x03: value_size = 6; break; // Int48
|
||
case 0x04: value_size = 8; break; // Int64
|
||
case 0x10: { // Bytes with 2-byte length prefix
|
||
uint16_t str_len;
|
||
if (fread(&str_len, 2, 1, decoder->input_fp) != 1) {
|
||
fprintf(stderr, "Error: Failed to read string length\n");
|
||
result = -1;
|
||
break;
|
||
}
|
||
value_size = str_len;
|
||
break;
|
||
}
|
||
default:
|
||
fprintf(stderr, "Warning: Unknown extended header value type 0x%02X\n", value_type);
|
||
break;
|
||
}
|
||
// Skip the value
|
||
if (value_size > 0) {
|
||
fseek(decoder->input_fp, value_size, SEEK_CUR);
|
||
}
|
||
}
|
||
if (result < 0) break;
|
||
continue;
|
||
}
|
||
|
||
// Read packet size (for remaining packet types with standard format)
|
||
uint32_t packet_size;
|
||
if (fread(&packet_size, 4, 1, decoder->input_fp) != 1) {
|
||
fprintf(stderr, "Error: Failed to read packet size at packet %d (type 0x%02X)\n",
|
||
total_packets, packet_type);
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
if (verbose && total_packets < 20) {
|
||
fprintf(stderr, "Packet %d: Type 0x%02X, Size %u bytes\n", total_packets, packet_type, packet_size);
|
||
}
|
||
|
||
switch (packet_type) {
|
||
case TAV_PACKET_IFRAME:
|
||
case TAV_PACKET_PFRAME:
|
||
iframe_count++;
|
||
if (verbose && iframe_count <= 5) {
|
||
fprintf(stderr, "Processing %s (packet %d, size %u bytes)...\n",
|
||
packet_type == TAV_PACKET_IFRAME ? "I-frame" : "P-frame",
|
||
total_packets, packet_size);
|
||
}
|
||
result = decode_i_or_p_frame(decoder, packet_type, packet_size);
|
||
if (result < 0) {
|
||
fprintf(stderr, "Error: Frame decoding failed at frame %d\n", decoder->frame_count);
|
||
break;
|
||
}
|
||
if (verbose && decoder->frame_count % 100 == 0) {
|
||
printf("Decoded frame %d\r", decoder->frame_count);
|
||
fflush(stdout);
|
||
}
|
||
break;
|
||
|
||
case TAV_PACKET_AUDIO_MP2:
|
||
case TAV_PACKET_AUDIO_TRACK:
|
||
// MP2 audio - write directly to audio pipe
|
||
// Note: FFmpeg cannot decode MP2 from raw stream, so we skip for now
|
||
if (verbose && total_packets < 20) {
|
||
fprintf(stderr, "Skipping MP2 audio packet (%u bytes) - not yet supported\n", packet_size);
|
||
}
|
||
fseek(decoder->input_fp, packet_size, SEEK_CUR);
|
||
break;
|
||
|
||
case TAV_PACKET_AUDIO_PCM8:
|
||
// PCM8 audio - already extracted in Pass 1, just skip
|
||
fseek(decoder->input_fp, packet_size, SEEK_CUR);
|
||
break;
|
||
|
||
case TAV_PACKET_SUBTITLE:
|
||
// Skip subtitle packets
|
||
fseek(decoder->input_fp, packet_size, SEEK_CUR);
|
||
break;
|
||
|
||
case TAV_PACKET_PFRAME_RESIDUAL:
|
||
case TAV_PACKET_BFRAME_RESIDUAL:
|
||
fprintf(stderr, "\nError: Unsupported packet type 0x%02X (MPEG-style motion compensation not supported)\n", packet_type);
|
||
result = -1;
|
||
break;
|
||
|
||
default:
|
||
fprintf(stderr, "\nWarning: Unknown packet type 0x%02X (skipping)\n", packet_type);
|
||
fseek(decoder->input_fp, packet_size, SEEK_CUR);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (verbose) {
|
||
printf("\nDecoded %d frames\n", decoder->frame_count);
|
||
}
|
||
|
||
tav_decoder_free(decoder);
|
||
|
||
if (result < 0) {
|
||
fprintf(stderr, "Decoding error occurred\n");
|
||
unlink(temp_audio_file); // Clean up temp file
|
||
return 1;
|
||
}
|
||
|
||
printf("Successfully decoded to: %s\n", output_file);
|
||
|
||
// Clean up temporary audio file
|
||
if (unlink(temp_audio_file) == 0 && verbose) {
|
||
fprintf(stderr, "Cleaned up temporary audio file: %s\n", temp_audio_file);
|
||
}
|
||
|
||
return 0;
|
||
}
|