struct sound_info
{
  char **waveform_data;
  int length_seconds;
  unsigned char max_neg;
  unsigned char max_pos;
  int vals_per_sec;
  int channels;
  int refcount;
  SNDFILE *snd;
  SF_INFO sfinfo;
  char *filename;
  gboolean *mute;
};

struct sound_play_data
{
  SNDFILE *snd;
  SF_INFO *sfinfo;
  KryMarker *marker_start;
  KryMarker *marker_end;
  long frame_start;
  long frame_current;
  long frame_end;
  long mili_start;
  gboolean do_exit;
  gboolean prevent_change;
  gboolean lock_gtk;

  int play_speed;
};


struct sound_info *sound_open(char *file, char **error);
void sound_play(SNDFILE *snd, SF_INFO *sfinfo, KryMarker *marker_start, KryMarker *marker_end);
long sound_buffer_fill(void *pSoundBuffer,long bufferLen, struct sound_play_data *data);
void sound_stop();
void sound_mute(int channel, gboolean doMute);
void sound_marker_end_changed(KryMarker *marker, long position, struct sound_play_data *data);
void sound_buffer_progress(int bytes, struct sound_play_data *data);
void sound_signal_pos_change(long pos);
void sound_init();