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 typedef struct pa_silence_cache {
  34     pa_memblock* blocks[PA_SAMPLE_MAX];
  35 } pa_silence_cache;
  36
  37 void pa_silence_cache_init(pa_silence_cache *cache);
  38 void pa_silence_cache_done(pa_silence_cache *cache);
  39
  40 void *pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec);
  41 pa_memchunk* pa_silence_memchunk(pa_memchunk *c, const pa_sample_spec *spec);
  42 pa_memblock* pa_silence_memblock(pa_memblock *b, const pa_sample_spec *spec);
  43
  44 pa_memchunk* pa_silence_memchunk_get(pa_silence_cache *cache, pa_mempool *pool, pa_memchunk* ret, const pa_sample_spec *spec, size_t length);
  45
  46 typedef struct pa_mix_info {
  47     pa_memchunk chunk;
  48     pa_cvolume volume;
  49     void *userdata;
  50
  51     /* The following fields are used internally by pa_mix(), should
  52      * not be initialised by the caller of pa_mix(). */
  53     void *ptr;
  54     union {
  55         int32_t i;
  56         float f;
  57     } linear[PA_CHANNELS_MAX];
  58 } pa_mix_info;
  59
  60 size_t pa_mix(
  61     pa_mix_info channels[],
  62     unsigned nchannels,
  63     void *data,
  64     size_t length,
  65     const pa_sample_spec *spec,
  66     const pa_cvolume *volume,
  67     pa_bool_t mute);
  68
  69 void pa_volume_memchunk(
  70     pa_memchunk*c,
  71     const pa_sample_spec *spec,
  72     const pa_cvolume *volume);
  73
  74 size_t pa_frame_align(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
  75
  76 int pa_frame_aligned(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
  77
  78 void pa_interleave(const void *src[], unsigned channels, void *dst, size_t ss, unsigned n);
  79 void pa_deinterleave(const void *src, void *dst[], unsigned channels, size_t ss, unsigned n);
  80
  81 void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const void *src, size_t sstr, unsigned n);
  82
  83 #endif