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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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b8e6aae08e
Ease generation of sine signals. Try to make the repeatable sine memblock fit into a single mempool slot.
88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
#ifndef foosampleutilhfoo
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#define foosampleutilhfoo
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/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <pulse/sample.h>
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#include <pulse/volume.h>
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#include <pulsecore/memblock.h>
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#include <pulsecore/memchunk.h>
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typedef struct pa_silence_cache {
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pa_memblock* blocks[PA_SAMPLE_MAX];
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} pa_silence_cache;
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void pa_silence_cache_init(pa_silence_cache *cache);
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void pa_silence_cache_done(pa_silence_cache *cache);
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void *pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec);
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pa_memchunk* pa_silence_memchunk(pa_memchunk *c, const pa_sample_spec *spec);
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pa_memblock* pa_silence_memblock(pa_memblock *b, const pa_sample_spec *spec);
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pa_memchunk* pa_silence_memchunk_get(pa_silence_cache *cache, pa_mempool *pool, pa_memchunk* ret, const pa_sample_spec *spec, size_t length);
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typedef struct pa_mix_info {
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pa_memchunk chunk;
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pa_cvolume volume;
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void *userdata;
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/* The following fields are used internally by pa_mix(), should
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* not be initialised by the caller of pa_mix(). */
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void *ptr;
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union {
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int32_t i;
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float f;
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} linear[PA_CHANNELS_MAX];
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} pa_mix_info;
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size_t pa_mix(
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pa_mix_info channels[],
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unsigned nchannels,
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void *data,
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size_t length,
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const pa_sample_spec *spec,
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const pa_cvolume *volume,
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pa_bool_t mute);
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void pa_volume_memchunk(
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pa_memchunk*c,
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const pa_sample_spec *spec,
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const pa_cvolume *volume);
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size_t pa_frame_align(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
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pa_bool_t pa_frame_aligned(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
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void pa_interleave(const void *src[], unsigned channels, void *dst, size_t ss, unsigned n);
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void pa_deinterleave(const void *src, void *dst[], unsigned channels, size_t ss, unsigned n);
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void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const void *src, size_t sstr, unsigned n);
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pa_usec_t pa_bytes_to_usec_round_up(uint64_t length, const pa_sample_spec *spec);
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size_t pa_usec_to_bytes_round_up(pa_usec_t t, const pa_sample_spec *spec);
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void pa_memchunk_dump_to_file(pa_memchunk *c, const char *fn);
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void pa_memchunk_sine(pa_memchunk *c, pa_mempool *pool, unsigned rate, unsigned freq);
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#endif
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