mirror of
https://github.com/signalwire/freeswitch.git
synced 2026-11-14 05:18:31 +00:00
Anthony Minessale
3eb3671fb2
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@6704 d0543943-73ff-0310-b7d9-9358b9ac24b2
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
#ifdef DEBUG_MP3
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#define debug_printf(fmt,...) printf(fmt, ##__VA_ARGS__);
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#else
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#define debug_printf(fmt,...)
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#endif
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#define NTOM_MUL (32768)
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struct buf {
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unsigned char *pnt;
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long size;
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long pos;
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struct buf *next;
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struct buf *prev;
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};
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struct framebuf {
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struct buf *buf;
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long pos;
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struct frame *next;
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struct frame *prev;
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};
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struct mpstr {
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struct buf *head, *tail;
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int bsize;
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int framesize;
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int fsizeold;
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struct frame fr;
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unsigned char bsspace[2][MAXFRAMESIZE + 512]; /* MAXFRAMESIZE */
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real hybrid_block[2][2][SBLIMIT * SSLIMIT];
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int hybrid_blc[2];
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unsigned long header;
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int bsnum;
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real synth_buffs[2][2][0x110];
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int synth_bo;
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long outscale; /* volume control default value 32768 */
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long outsamplerate; /* raw output rate default same as mp3 sample rate */
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struct pcm_workingsample worksample; /* keep the state of the working sample for threads */
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int initmp3; /* flag for first initialisation */
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int longLimit[9][23]; /*sample limits re setting volume */
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int shortLimit[9][14];
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real decwin[512 + 32]; /* scale table */
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unsigned long ntom_val[2];
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unsigned long ntom_step;
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};
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#define BOOL int
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#define MP3_ERR -1
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#define MP3_OK 0
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#define MP3_NEED_MORE 1
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#define MP3_TOOSMALL 2
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void InitMP3Constants(void);
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BOOL InitMP3(struct mpstr *mp, long outscale, int samplerate);
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int decodeMP3(struct mpstr *mp, char *inmemory, int inmemsize, char *outmemory, int outmemsize, int *done);
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void ExitMP3(struct mpstr *mp);
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extern int synth_ntom_set_step(struct mpstr *mp, long, long);
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extern int synth_ntom(struct mpstr *mp, real * bandPtr, int channel, unsigned char *out, int *pnt);
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extern int synth_ntom_mono(struct mpstr *mp, real * bandPtr, unsigned char *samples, int *pnt);
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extern int synth_ntom_8bit(real *, int, unsigned char *, int *);
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extern int synth_ntom_mono2stereo(real *, unsigned char *, int *);
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extern int synth_ntom_8bit_mono(real *, unsigned char *, int *);
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extern int synth_ntom_8bit_mono2stereo(real *, unsigned char *, int *);
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extern void init_layer3_sample_limits(struct mpstr *mp, int down_sample_sblimit);
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extern void init_layer3_const(void);
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extern int do_layer3(struct mpstr *mp, unsigned char *, int *);
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extern void make_decode_tables_scale(struct mpstr *mp, long scaleval);
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extern void make_decode_tables_const(void);
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extern void make_conv16to8_table(int);
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extern void dct64(real *, real *, real *);
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extern unsigned int get1bit(struct mpstr *mp);
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extern unsigned int getbits(struct mpstr *mp, int);
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extern unsigned int getbits_fast(struct mpstr *mp, int);
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extern int set_pointer(struct mpstr *mp, long backstep);
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