# define CONFIG_FLOAT 0
#endif
-#include "avcodec.h"
-#include "get_bits.h"
-#include "dsputil.h"
-#include "dct.h"
+#include <stdint.h>
/* max frame size, in samples */
#define MPA_FRAME_SIZE 1152
#define MPA_DUAL 2
#define MPA_MONO 3
-/* header + layer + bitrate + freq + lsf/mpeg25 */
-#define SAME_HEADER_MASK \
- (0xffe00000 | (3 << 17) | (0xf << 12) | (3 << 10) | (3 << 19))
-
-#define MP3_MASK 0xFFFE0CCF
-
#ifndef FRAC_BITS
#define FRAC_BITS 23 /* fractional bits for sb_samples and dct */
#define WFRAC_BITS 16 /* fractional bits for window */
#define FIX(a) ((int)((a) * FRAC_ONE))
-#if CONFIG_FLOAT
-typedef float OUT_INT;
-#else
-typedef int16_t OUT_INT;
-#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15)
-#endif
-
#if CONFIG_FLOAT
# define INTFLOAT float
typedef float MPA_INT;
+typedef float OUT_INT;
#elif FRAC_BITS <= 15
# define INTFLOAT int
typedef int16_t MPA_INT;
+typedef int16_t OUT_INT;
#else
# define INTFLOAT int
typedef int32_t MPA_INT;
+typedef int16_t OUT_INT;
#endif
-#define BACKSTEP_SIZE 512
-#define EXTRABYTES 24
-
-/* layer 3 "granule" */
-typedef struct GranuleDef {
- uint8_t scfsi;
- int part2_3_length;
- int big_values;
- int global_gain;
- int scalefac_compress;
- uint8_t block_type;
- uint8_t switch_point;
- int table_select[3];
- int subblock_gain[3];
- uint8_t scalefac_scale;
- uint8_t count1table_select;
- int region_size[3]; /* number of huffman codes in each region */
- int preflag;
- int short_start, long_end; /* long/short band indexes */
- uint8_t scale_factors[40];
- INTFLOAT sb_hybrid[SBLIMIT * 18]; /* 576 samples */
-} 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, INTFLOAT, sb_samples)[MPA_MAX_CHANNELS][36][SBLIMIT];
- INTFLOAT mdct_buf[MPA_MAX_CHANNELS][SBLIMIT * 18]; /* previous samples, for layer 3 MDCT */
- GranuleDef granules[2][2]; /* Used in Layer 3 */
-#ifdef DEBUG
- int frame_count;
-#endif
- int adu_mode; ///< 0 for standard mp3, 1 for adu formatted mp3
- int dither_state;
- int error_recognition;
- AVCodecContext* avctx;
-#if CONFIG_FLOAT
- DCTContext dct;
-#endif
- void (*apply_window_mp3)(MPA_INT *synth_buf, MPA_INT *window,
- int *dither_state, OUT_INT *samples, int incr);
-} MPADecodeContext;
-
-/* layer 3 huffman tables */
-typedef struct HuffTable {
- int xsize;
- const uint8_t *bits;
- const uint16_t *codes;
-} HuffTable;
-
int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
-int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate, int *channels, int *frame_size, int *bitrate);
-extern MPA_INT ff_mpa_synth_window[];
-void ff_mpa_synth_init(MPA_INT *window);
-void ff_mpa_synth_filter(MPA_INT *synth_buf_ptr, int *synth_buf_offset,
- MPA_INT *window, int *dither_state,
- OUT_INT *samples, int incr,
- INTFLOAT sb_samples[SBLIMIT]);
-
-void ff_mpa_synth_init_float(MPA_INT *window);
-void ff_mpa_synth_filter_float(MPADecodeContext *s,
- MPA_INT *synth_buf_ptr, int *synth_buf_offset,
- MPA_INT *window, int *dither_state,
- OUT_INT *samples, int incr,
- INTFLOAT sb_samples[SBLIMIT]);
-
-void ff_mpegaudiodec_init_mmx(MPADecodeContext *s);
-void ff_mpegaudiodec_init_altivec(MPADecodeContext *s);
-
-/* fast header check for resync */
-static inline int ff_mpa_check_header(uint32_t header){
- /* header */
- if ((header & 0xffe00000) != 0xffe00000)
- return -1;
- /* layer check */
- if ((header & (3<<17)) == 0)
- return -1;
- /* bit rate */
- if ((header & (0xf<<12)) == 0xf<<12)
- return -1;
- /* frequency */
- if ((header & (3<<10)) == 3<<10)
- return -1;
- return 0;
-}
#endif /* AVCODEC_MPEGAUDIO_H */