1 /* 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2021 Goran Mekić 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include "ossinit.h" 29 30 int 31 main() 32 { 33 config_t config = { 34 .device = "/dev/dsp", 35 .channels = -1, 36 .format = format, 37 .frag = -1, 38 .sample_rate = 48000, 39 .sample_size = sizeof(sample_t), 40 .buffer_info.fragments = -1, 41 .mmap = 0, 42 }; 43 44 /* Initialize device */ 45 oss_init(&config); 46 47 /* 48 * Allocate input and output buffers so that their size match 49 * frag_size 50 */ 51 int ret; 52 int bytes = config.buffer_info.bytes; 53 int8_t *ibuf = malloc(bytes); 54 int8_t *obuf = malloc(bytes); 55 sample_t *channels = malloc(bytes); 56 57 printf( 58 "bytes: %d, fragments: %d, fragsize: %d, fragstotal: %d, samples: %d\n", 59 bytes, 60 config.buffer_info.fragments, 61 config.buffer_info.fragsize, 62 config.buffer_info.fragstotal, 63 config.sample_count 64 ); 65 66 /* Minimal engine: read input and copy it to the output */ 67 for (;;) { 68 ret = read(config.fd, ibuf, bytes); 69 if (ret < bytes) { 70 fprintf( 71 stderr, 72 "Requested %d bytes, but read %d!\n", 73 bytes, 74 ret 75 ); 76 break; 77 } 78 oss_split(&config, (sample_t *)ibuf, channels); 79 /* All processing will happen here */ 80 oss_merge(&config, channels, (sample_t *)obuf); 81 ret = write(config.fd, obuf, bytes); 82 if (ret < bytes) { 83 fprintf( 84 stderr, 85 "Requested %d bytes, but wrote %d!\n", 86 bytes, 87 ret 88 ); 89 break; 90 } 91 } 92 93 /* Cleanup */ 94 free(channels); 95 free(obuf); 96 free(ibuf); 97 close(config.fd); 98 return (0); 99 } 100