wavefile.h

   1 #ifndef WAVEFILE_H
   2 #define WAVEFILE_H
   3
   4 #include "aformat.h"
   5 #include "stdio.h"
   6 #include "sys/types.h"
   7 #include "errors.h"
   8
   9 enum {
  10     EFOPEN = ERR_GROUP(8),  // fopen failed
  11     EFREAD,                 // fread failed
  12     EFORMAT,                // invalid file format
  13     EWAVE_EOF,              // read beyond the end of the wave file
  14 };
  15
  16 struct waveformat {
  17     int srate;
  18     int bits;
  19     int channels;
  20 };
  21
  22 struct wavefile
  23 {
  24     const char *filename;
  25     FILE *f;
  26     struct waveformat format;
  27     long length;    // length, in samples
  28     off_t pcm_start; // file offset to start of actual audio data
  29 };
  30
  31 err_t wavefile_open(struct wavefile *wav, const char *filename);
  32 err_t wavefile_read_at(struct wavefile *wav, off_t sample_start, void *buf, size_t n_samples);
  33
  34 #endif