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40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
#ifndef TAD32_DECODER_H
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#define TAD32_DECODER_H
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#include <stdint.h>
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#include <stddef.h>
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// TAD32 (Terrarum Advanced Audio - PCM32f version) Decoder
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// DWT-based perceptual audio codec for TSVM
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// Shared decoder library used by both decoder_tad (standalone) and decoder_tav (video decoder)
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// Constants (must match encoder)
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#define TAD32_SAMPLE_RATE 32000
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#define TAD32_CHANNELS 2 // Stereo
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#define TAD_DEFAULT_CHUNK_SIZE 31991 // Default chunk size for standalone TAD files
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/**
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* Decode audio chunk with TAD32 codec
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*
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* @param input Input TAD32 chunk data
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* @param input_size Size of input buffer
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* @param pcmu8_stereo Output PCMu8 stereo samples (interleaved L,R)
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* @param bytes_consumed [out] Number of bytes consumed from input
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* @param samples_decoded [out] Number of samples decoded per channel
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* @return 0 on success, -1 on error
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*
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* Input format:
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* uint16 sample_count (samples per channel)
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* uint8 max_index (maximum quantization index)
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* uint32 payload_size (bytes in payload)
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* * payload (encoded M/S data, Zstd-compressed with EZBC)
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*
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* Output format:
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* PCMu8 stereo interleaved (8-bit unsigned PCM, L,R pairs)
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* Range: [0, 255] where 128 = silence
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*/
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int tad32_decode_chunk(const uint8_t *input, size_t input_size, uint8_t *pcmu8_stereo,
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size_t *bytes_consumed, size_t *samples_decoded);
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#endif // TAD32_DECODER_H
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