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efc3491f1f
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@125 fefdeb5f-60dc-0310-8127-8f9354f1896f
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
#ifndef foosamplehfoo
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#define foosamplehfoo
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/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU 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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polypaudio 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 General Public License
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along with polypaudio; 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 <inttypes.h>
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#include <sys/types.h>
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#include "cdecl.h"
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PA_C_DECL_BEGIN
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enum pa_sample_format {
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PA_SAMPLE_U8,
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PA_SAMPLE_ALAW,
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PA_SAMPLE_ULAW,
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PA_SAMPLE_S16LE,
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PA_SAMPLE_S16BE,
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PA_SAMPLE_FLOAT32LE,
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PA_SAMPLE_FLOAT32BE,
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PA_SAMPLE_MAX
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};
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#ifdef WORDS_BIGENDIAN
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#define PA_SAMPLE_S16NE PA_SAMPLE_S16BE
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#define PA_SAMPLE_FLOAT32NE PA_SAMPLE_FLOAT32BE
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#else
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#define PA_SAMPLE_S16NE PA_SAMPLE_S16LE
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#define PA_SAMPLE_FLOAT32NE PA_SAMPLE_FLOAT32LE
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#endif
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#define PA_SAMPLE_FLOAT32 PA_SAMPLE_FLOAT32NE
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/** A sample format and attribute specification */
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struct pa_sample_spec {
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enum pa_sample_format format; /**< The sample format */
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uint32_t rate; /**< The sample rate. (e.g. 44100) */
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uint8_t channels; /**< Audio channels. (1 for mono, 2 for stereo, ...) */
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};
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size_t pa_bytes_per_second(const struct pa_sample_spec *spec);
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size_t pa_frame_size(const struct pa_sample_spec *spec);
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uint32_t pa_bytes_to_usec(size_t length, const struct pa_sample_spec *spec);
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int pa_sample_spec_valid(const struct pa_sample_spec *spec);
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int pa_sample_spec_equal(const struct pa_sample_spec*a, const struct pa_sample_spec*b);
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#define PA_SAMPLE_SNPRINT_MAX_LENGTH 32
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void pa_sample_snprint(char *s, size_t l, const struct pa_sample_spec *spec);
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/** Normal volume (100%) */
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#define PA_VOLUME_NORM (0x100)
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/** Muted volume (0%) */
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#define PA_VOLUME_MUTE (0)
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/** Multiply two volumes specifications, return the result. This uses PA_VOLUME_NORM as neutral element of multiplication. */
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uint32_t pa_volume_multiply(uint32_t a, uint32_t b);
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PA_C_DECL_END
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#endif
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