1 #ifndef foosampleutilhfoo
2 #define foosampleutilhfoo
7 This file is part of PulseAudio.
9 Copyright 2004-2006 Lennart Poettering
10 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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.
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.
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
28 #include <pulse/sample.h>
29 #include <pulse/volume.h>
30 #include <pulsecore/memblock.h>
31 #include <pulsecore/memchunk.h>
33 typedef struct pa_silence_cache {
34 pa_memblock* blocks[PA_SAMPLE_MAX];
37 void pa_silence_cache_init(pa_silence_cache *cache);
38 void pa_silence_cache_done(pa_silence_cache *cache);
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);
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);
46 typedef struct pa_mix_info {
51 /* The following fields are used internally by pa_mix(), should
52 * not be initialised by the caller of pa_mix(). */
57 } linear[PA_CHANNELS_MAX];
61 pa_mix_info channels[],
65 const pa_sample_spec *spec,
66 const pa_cvolume *volume,
69 void pa_volume_memchunk(
71 const pa_sample_spec *spec,
72 const pa_cvolume *volume);
74 size_t pa_frame_align(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
76 int pa_frame_aligned(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
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);
81 void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const void *src, size_t sstr, unsigned n);