code.delx.au - pulseaudio/blob - src/sample-util.h

   1 #ifndef foosampleutilhfoo
   2 #define foosampleutilhfoo
   3
   4 #include "sample.h"
   5 #include "memblock.h"
   6 #include "memchunk.h"
   7
   8 #define PA_DEFAULT_SAMPLE_SPEC pa_default_sample_spec
   9
  10 extern struct pa_sample_spec pa_default_sample_spec;
  11
  12 #define PA_VOLUME_NORM (0x100)
  13 #define PA_VOLUME_MUTE (0)
  14
  15 struct pa_memblock *pa_silence_memblock(struct pa_memblock* b, const struct pa_sample_spec *spec);
  16 void pa_silence_memchunk(struct pa_memchunk *c, const struct pa_sample_spec *spec);
  17 void pa_silence_memory(void *p, size_t length, const struct pa_sample_spec *spec);
  18
  19 struct pa_mix_info {
  20     struct pa_memchunk chunk;
  21     uint32_t volume;
  22     void *userdata;
  23 };
  24
  25 size_t pa_mix(struct pa_mix_info channels[], unsigned nchannels, void *data, size_t length, const struct pa_sample_spec *spec, uint32_t volume);
  26
  27 void pa_volume_memchunk(struct pa_memchunk*c, const struct pa_sample_spec *spec, uint32_t volume);
  28
  29 uint32_t pa_volume_multiply(uint32_t a, uint32_t b);
  30
  31 #endif