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
  43     /* The following fields are used internally by pa_mix(), should
  44      * not be initialised by the caller of pa_mix(). */
  45     void *ptr;
  46     union {
  47         int32_t i;
  48         float f;
  49     } linear[PA_CHANNELS_MAX];
  50 } pa_mix_info;
  51
  52 size_t pa_mix(
  53     pa_mix_info channels[],
  54     unsigned nchannels,
  55     void *data,
  56     size_t length,
  57     const pa_sample_spec *spec,
  58     const pa_cvolume *volume,
  59     pa_bool_t mute);
  60
  61 void pa_volume_memchunk(
  62     pa_memchunk*c,
  63     const pa_sample_spec *spec,
  64     const pa_cvolume *volume);
  65
  66 size_t pa_frame_align(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
  67
  68 int pa_frame_aligned(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
  69
  70 void pa_interleave(const void *src[], unsigned channels, void *dst, size_t ss, unsigned n);
  71 void pa_deinterleave(const void *src, void *dst[], unsigned channels, size_t ss, unsigned n);
  72
  73 #endif