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loosen dependencies over mpegaudiodec

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Originally committed as revision 9080 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs
2007-05-20 13:40:07 +00:00
parent 663deb54af
commit 4bd8e17c8d
7 changed files with 234 additions and 155 deletions
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44
libavcodec/mpegaudio.h
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@@ -23,6 +23,12 @@
* mpeg audio declarations for both encoder and decoder.
*/
#ifndef MPEGAUDIO_H
#define MPEGAUDIO_H
#include "bitstream.h"
#include "dsputil.h"
/* max frame size, in samples */
#define MPA_FRAME_SIZE 1152
@@ -73,6 +79,42 @@ typedef int16_t MPA_INT;
typedef int32_t MPA_INT;
#endif
#define BACKSTEP_SIZE 512
#define EXTRABYTES 24
struct GranuleDef;
typedef struct MPADecodeContext {
DECLARE_ALIGNED_8(uint8_t, last_buf[2*BACKSTEP_SIZE + EXTRABYTES]);
int last_buf_size;
int frame_size;
/* next header (used in free format parsing) */
uint32_t free_format_next_header;
int error_protection;
int layer;
int sample_rate;
int sample_rate_index; /* between 0 and 8 */
int bit_rate;
GetBitContext gb;
GetBitContext in_gb;
int nb_channels;
int mode;
int mode_ext;
int lsf;
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_resilience;
AVCodecContext* avctx;
} MPADecodeContext;
int l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
int mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate);
void ff_mpa_synth_init(MPA_INT *window);
@@ -97,3 +139,5 @@ static inline int ff_mpa_check_header(uint32_t header){
return -1;
return 0;
}
#endif /* MPEGAUDIO_H */