| 1 | /*
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| 2 | * Copyright (c) 2012 Jan Vesely
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup audio
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| 30 | * @brief HelenOS sound server
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| 31 | * @{
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| 32 | */
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| 33 | /** @file
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| 34 | */
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| 35 |
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| 36 | #ifndef AUDIO_FORMAT_H_
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| 37 | #define AUDIO_FORMAT_H_
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| 38 |
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| 39 | #include <assert.h>
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| 40 | #include <bool.h>
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| 41 | #include <pcm_sample_format.h>
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| 42 |
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| 43 |
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| 44 | typedef struct {
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| 45 | unsigned channels;
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| 46 | unsigned sampling_rate;
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| 47 | pcm_sample_format_t sample_format;
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| 48 | } audio_format_t;
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| 49 |
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| 50 | static const audio_format_t AUDIO_FORMAT_DEFAULT = {
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| 51 | .channels = 2,
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| 52 | .sampling_rate = 44100,
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| 53 | .sample_format = PCM_SAMPLE_SINT16_LE,
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| 54 | };
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| 55 |
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| 56 | static const audio_format_t AUDIO_FORMAT_ANY = {
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| 57 | .channels = 0,
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| 58 | .sampling_rate = 0,
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| 59 | .sample_format = 0,
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| 60 | };
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| 61 |
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| 62 |
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| 63 |
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| 64 |
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| 65 | bool audio_format_same(const audio_format_t *a, const audio_format_t* b);
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| 66 | static inline bool audio_format_is_any(const audio_format_t *f)
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| 67 | {
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| 68 | return audio_format_same(f, &AUDIO_FORMAT_ANY);
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| 69 | }
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| 70 | int audio_format_mix(void *dst, const void *src, size_t size, const audio_format_t *f);
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| 71 | int audio_format_convert(audio_format_t a, void* srca, size_t sizea,
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| 72 | audio_format_t b, void* srcb, size_t *sizeb);
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| 73 |
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| 74 | #endif
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| 75 |
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| 76 | /**
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| 77 | * @}
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| 78 | */
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