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

   1 #ifndef foosampleutilhfoo
   2 #define foosampleutilhfoo
   3
   4 /* $Id$ */
   5
   6 /***
   7   This file is part of PulseAudio.
   8
   9   Copyright 2004-2006 Lennart Poettering
  10   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
  11
  12   PulseAudio is free software; you can redistribute it and/or modify
  13   it under the terms of the GNU Lesser General Public License as published
  14   by the Free Software Foundation; either version 2 of the License,
  15   or (at your option) any later version.
  16
  17   PulseAudio is distributed in the hope that it will be useful, but
  18   WITHOUT ANY WARRANTY; without even the implied warranty of
  19   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20   General Public License for more details.
  21
  22   You should have received a copy of the GNU Lesser General Public License
  23   along with PulseAudio; if not, write to the Free Software
  24   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  25   USA.
  26 ***/
  27
  28 #include <pulse/sample.h>
  29 #include <pulse/volume.h>
  30 #include <pulsecore/memblock.h>
  31 #include <pulsecore/memchunk.h>
  32
  33 pa_memblock *pa_silence_memblock(pa_memblock* b, const pa_sample_spec *spec);
  34 pa_memblock *pa_silence_memblock_new(pa_mempool *pool, const pa_sample_spec *spec, size_t length);
  35 void pa_silence_memchunk(pa_memchunk *c, const pa_sample_spec *spec);
  36 void pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec);
  37
  38 typedef struct pa_mix_info {
  39     pa_memchunk chunk;
  40     pa_cvolume volume;
  41     void *userdata;
  42     void *internal; /* Used internally by pa_mix(), should not be initialised when calling pa_mix() */
  43 } pa_mix_info;
  44
  45 size_t pa_mix(
  46     pa_mix_info channels[],
  47     unsigned nchannels,
  48     void *data,
  49     size_t length,
  50     const pa_sample_spec *spec,
  51     const pa_cvolume *volume,
  52     int mute);
  53
  54 void pa_volume_memchunk(
  55     pa_memchunk*c,
  56     const pa_sample_spec *spec,
  57     const pa_cvolume *volume);
  58
  59 size_t pa_frame_align(size_t l, const pa_sample_spec *ss);
  60
  61 int pa_frame_aligned(size_t l, const pa_sample_spec *ss);
  62
  63 #endif