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

   1 #ifndef foosampleutilhfoo
   2 #define foosampleutilhfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2004-2006 Lennart Poettering
   8   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   9
  10   PulseAudio is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU Lesser General Public License as published
  12   by the Free Software Foundation; either version 2 of the License,
  13   or (at your option) any later version.
  14
  15   PulseAudio is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with PulseAudio; if not, write to the Free Software
  22   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23   USA.
  24 ***/
  25
  26 #include <pulse/sample.h>
  27 #include <pulse/volume.h>
  28 #include <pulsecore/memblock.h>
  29 #include <pulsecore/memchunk.h>
  30
  31 typedef struct pa_silence_cache {
  32     pa_memblock* blocks[PA_SAMPLE_MAX];
  33 } pa_silence_cache;
  34
  35 void pa_silence_cache_init(pa_silence_cache *cache);
  36 void pa_silence_cache_done(pa_silence_cache *cache);
  37
  38 void *pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec);
  39 pa_memchunk* pa_silence_memchunk(pa_memchunk *c, const pa_sample_spec *spec);
  40 pa_memblock* pa_silence_memblock(pa_memblock *b, const pa_sample_spec *spec);
  41
  42 pa_memchunk* pa_silence_memchunk_get(pa_silence_cache *cache, pa_mempool *pool, pa_memchunk* ret, const pa_sample_spec *spec, size_t length);
  43
  44 typedef struct pa_mix_info {
  45     pa_memchunk chunk;
  46     pa_cvolume volume;
  47     void *userdata;
  48
  49     /* The following fields are used internally by pa_mix(), should
  50      * not be initialised by the caller of pa_mix(). */
  51     void *ptr;
  52     union {
  53         int32_t i;
  54         float f;
  55     } linear[PA_CHANNELS_MAX];
  56 } pa_mix_info;
  57
  58 size_t pa_mix(
  59     pa_mix_info channels[],
  60     unsigned nchannels,
  61     void *data,
  62     size_t length,
  63     const pa_sample_spec *spec,
  64     const pa_cvolume *volume,
  65     pa_bool_t mute);
  66
  67 void pa_volume_memchunk(
  68     pa_memchunk*c,
  69     const pa_sample_spec *spec,
  70     const pa_cvolume *volume);
  71
  72 size_t pa_frame_align(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
  73
  74 pa_bool_t pa_frame_aligned(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
  75
  76 void pa_interleave(const void *src[], unsigned channels, void *dst, size_t ss, unsigned n);
  77 void pa_deinterleave(const void *src, void *dst[], unsigned channels, size_t ss, unsigned n);
  78
  79 void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const void *src, size_t sstr, unsigned n);
  80
  81 pa_usec_t pa_bytes_to_usec_round_up(uint64_t length, const pa_sample_spec *spec);
  82 size_t pa_usec_to_bytes_round_up(pa_usec_t t, const pa_sample_spec *spec);
  83
  84 void pa_memchunk_dump_to_file(pa_memchunk *c, const char *fn);
  85
  86 void pa_memchunk_sine(pa_memchunk *c, pa_mempool *pool, unsigned rate, unsigned freq);
  87
  88 #endif