1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2016 Alex Teaca <iateaca@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _AUDIO_EMUL_H_ 32 #define _AUDIO_EMUL_H_ 33 34 #include <sys/types.h> 35 #include <sys/soundcard.h> 36 37 /* 38 * Audio Player data structures 39 */ 40 41 struct audio; 42 43 struct audio_params { 44 int channels; 45 int format; 46 int rate; 47 }; 48 49 /* 50 * Audio Player API 51 */ 52 53 /* 54 * audio_init - initialize an instance of audio player 55 * @dev_name - the backend sound device used to play / capture 56 * @dir - dir = 1 for write mode, dir = 0 for read mode 57 * Returns NULL on error and the address of the audio player instance 58 */ 59 struct audio *audio_init(const char *dev_name, uint8_t dir); 60 61 /* 62 * audio_set_params - reset the sound device and set the audio params 63 * @aud - the audio player to be configured 64 * @params - the audio parameters to be set 65 * Returns -1 on error and 0 on success 66 */ 67 int audio_set_params(struct audio *aud, struct audio_params *params); 68 69 /* 70 * audio_playback - plays samples to the sound device using blocking operations 71 * @aud - the audio player used to play the samples 72 * @buf - the buffer containing the samples 73 * @count - the number of bytes in buffer 74 * Returns -1 on error and 0 on success 75 */ 76 int audio_playback(struct audio *aud, const void *buf, size_t count); 77 78 /* 79 * audio_record - records samples from the sound device using blocking 80 * operations. 81 * @aud - the audio player used to capture the samples 82 * @buf - the buffer to receive the samples 83 * @count - the number of bytes to capture in buffer 84 * Returns -1 on error and 0 on success 85 */ 86 int audio_record(struct audio *aud, void *buf, size_t count); 87 88 #endif /* _AUDIO_EMUL_H_ */ 89