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TAV: Haar delta decoding

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minjaesong
2025-10-16 01:39:51 +09:00
parent ea72dec996
commit e19af854dc
3 changed files with 69 additions and 20 deletions
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17
video_encoder/encoder_tav.c
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@@ -104,7 +104,8 @@ static int needs_alpha_channel(int channel_layout) {
#define DEFAULT_FPS 30
#define DEFAULT_QUALITY 3
#define DEFAULT_ZSTD_LEVEL 9
#define GOP_SIZE /*1*/4
#define GOP_SIZE 8
#define TEMPORAL_DECOMP_LEVEL 2
// Audio/subtitle constants (reused from TEV)
#define MP2_DEFAULT_PACKET_SIZE 1152
@@ -778,13 +779,13 @@ static tav_encoder_t* create_encoder(void) {
enc->progressive_mode = 1; // Default to progressive mode
enc->grain_synthesis = 0; // Default: disable grain synthesis (only do it on the decoder)
enc->use_delta_encoding = 0;
enc->delta_haar_levels = 2;
enc->delta_haar_levels = TEMPORAL_DECOMP_LEVEL;
// GOP / temporal DWT settings
enc->enable_temporal_dwt = 0; // Default: disabled for backward compatibility. Mutually exclusive with use_delta_encoding
enc->gop_capacity = GOP_SIZE; // 16 frames
enc->gop_frame_count = 0;
enc->temporal_decomp_levels = 2; // 2 levels of temporal DWT (16 -> 4x4 subbands)
enc->temporal_decomp_levels = TEMPORAL_DECOMP_LEVEL; // 2 levels of temporal DWT (16 -> 4x4 subbands)
enc->gop_rgb_frames = NULL;
enc->gop_y_frames = NULL;
enc->gop_co_frames = NULL;
@@ -2985,8 +2986,14 @@ static size_t serialise_tile_data(tav_encoder_t *enc, int tile_x, int tile_y,
uint8_t mode, uint8_t *buffer) {
size_t offset = 0;
// Write tile header
buffer[offset++] = mode;
// Write tile header with Haar level encoded in upper nibble for DELTA mode
// Mode encoding: base_mode | ((haar_level - 1) << 4)
// - level 1: 0x02, level 2: 0x12, level 3: 0x22
uint8_t encoded_mode = mode;
if (mode == TAV_MODE_DELTA && enc->delta_haar_levels >= 1) {
encoded_mode = mode | ((enc->delta_haar_levels - 1) << 4);
}
buffer[offset++] = encoded_mode;
// Use adjusted quantiser from bitrate control, or base quantiser if not in bitrate mode
int qY_override = enc->bitrate_mode ? quantiser_float_to_int_dithered(enc) : enc->quantiser_y;