vorbis-tools/oggenc/audio.h

   1
   2 #ifndef __AUDIO_H
   3 #define __AUDIO_H
   4
   5 #include "encode.h"
   6 #include <stdio.h>
   7
   8 int setup_resample(oe_enc_opt *opt);
   9 void clear_resample(oe_enc_opt *opt);
  10 void setup_downmix(oe_enc_opt *opt);
  11 void clear_downmix(oe_enc_opt *opt);
  12 void setup_scaler(oe_enc_opt *opt, float scale);
  13 void clear_scaler(oe_enc_opt *opt);
  14
  15 typedef struct
  16 {
  17     int (*id_func)(unsigned char *buf, int len); /* Returns true if can load file */
  18     int id_data_len; /* Amount of data needed to id whether this can load the file */
  19     int (*open_func)(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen);
  20     void (*close_func)(void *);
  21     char *format;
  22     char *description;
  23 } input_format;
  24
  25
  26 typedef struct {
  27     short format;
  28     short channels;
  29     int samplerate;
  30     int bytespersec;
  31     short align;
  32     short samplesize;
  33 } wav_fmt;
  34
  35 typedef struct {
  36     short channels;
  37     short samplesize;
  38     long totalsamples;
  39     long samplesread;
  40     FILE *f;
  41     short bigendian;
  42         int *channel_permute;
  43 } wavfile;
  44
  45 typedef struct {
  46     short channels;
  47     int totalframes;
  48     short samplesize;
  49     int rate;
  50     int offset;
  51     int blocksize;
  52 } aiff_fmt;
  53
  54 typedef wavfile aifffile; /* They're the same */
  55
  56 input_format *open_audio_file(FILE *in, oe_enc_opt *opt);
  57
  58 int raw_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen);
  59 int wav_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen);
  60 int aiff_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen);
  61 int wav_id(unsigned char *buf, int len);
  62 int aiff_id(unsigned char *buf, int len);
  63 void wav_close(void *);
  64 void raw_close(void *);
  65
  66 long wav_read(void *, float **buffer, int samples);
  67 long wav_ieee_read(void *, float **buffer, int samples);
  68 long raw_read_stereo(void *, float **buffer, int samples);
  69
  70 #endif /* __AUDIO_H */
  71