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87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2016 Alex Teaca <iateaca@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _AUDIO_EMUL_H_
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#define _AUDIO_EMUL_H_
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#include <sys/types.h>
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#include <sys/soundcard.h>
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/*
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* Audio Player data structures
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*/
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struct audio;
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struct audio_params {
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int channels;
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int format;
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int rate;
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};
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/*
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* Audio Player API
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*/
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/*
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* audio_init - initialize an instance of audio player
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* @dev_name - the backend sound device used to play / capture
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* @dir - dir = 1 for write mode, dir = 0 for read mode
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* Returns NULL on error and the address of the audio player instance
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*/
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struct audio *audio_init(const char *dev_name, uint8_t dir);
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/*
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* audio_set_params - reset the sound device and set the audio params
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* @aud - the audio player to be configured
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* @params - the audio parameters to be set
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* Returns -1 on error and 0 on success
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*/
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int audio_set_params(struct audio *aud, struct audio_params *params);
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/*
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* audio_playback - plays samples to the sound device using blocking operations
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* @aud - the audio player used to play the samples
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* @buf - the buffer containing the samples
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* @count - the number of bytes in buffer
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* Returns -1 on error and 0 on success
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*/
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int audio_playback(struct audio *aud, const uint8_t *buf, size_t count);
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/*
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* audio_record - records samples from the sound device using blocking
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* operations.
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* @aud - the audio player used to capture the samples
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* @buf - the buffer to receive the samples
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* @count - the number of bytes to capture in buffer
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* Returns -1 on error and 0 on success
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*/
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int audio_record(struct audio *aud, uint8_t *buf, size_t count);
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#endif /* _AUDIO_EMUL_H_ */
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