-#define BACKSTEP_SIZE 512
-#define EXTRABYTES 24
-
-struct GranuleDef;
-
-#define MPA_DECODE_HEADER \
- int frame_size; \
- int error_protection; \
- int layer; \
- int sample_rate; \
- int sample_rate_index; /* between 0 and 8 */ \
- int bit_rate; \
- int nb_channels; \
- int mode; \
- int mode_ext; \
- int lsf;
-
-typedef struct MPADecodeHeader {
- MPA_DECODE_HEADER
-} MPADecodeHeader;
-
-typedef struct MPADecodeContext {
- MPA_DECODE_HEADER
- uint8_t last_buf[2*BACKSTEP_SIZE + EXTRABYTES];
- int last_buf_size;
- /* next header (used in free format parsing) */
- uint32_t free_format_next_header;
- GetBitContext gb;
- GetBitContext in_gb;
- DECLARE_ALIGNED_16(MPA_INT, synth_buf[MPA_MAX_CHANNELS][512 * 2]);
- int synth_buf_offset[MPA_MAX_CHANNELS];
- DECLARE_ALIGNED_16(int32_t, sb_samples[MPA_MAX_CHANNELS][36][SBLIMIT]);
- int32_t mdct_buf[MPA_MAX_CHANNELS][SBLIMIT * 18]; /* previous samples, for layer 3 MDCT */
-#ifdef DEBUG
- int frame_count;
-#endif
- void (*compute_antialias)(struct MPADecodeContext *s, struct GranuleDef *g);
- int adu_mode; ///< 0 for standard mp3, 1 for adu formatted mp3
- int dither_state;
- int error_recognition;
- AVCodecContext* avctx;
-} MPADecodeContext;
-
-/* layer 3 huffman tables */
-typedef struct HuffTable {
- int xsize;
- const uint8_t *bits;
- const uint16_t *codes;
-} HuffTable;
-