Annotation of src/usr.bin/aucat/legacy.c, Revision 1.1
1.1 ! ratchov 1: /* $OpenBSD$ */
! 2: /*
! 3: * Copyright (c) 1997 Kenneth Stailey. All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. All advertising materials mentioning features or use of this software
! 14: * must display the following acknowledgement:
! 15: * This product includes software developed by Kenneth Stailey.
! 16: * 4. The name of the author may not be used to endorse or promote products
! 17: * derived from this software without specific prior written permission.
! 18: *
! 19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 20: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 21: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 22: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 23: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 24: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 28: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 29: */
! 30:
! 31: #include <fcntl.h>
! 32: #include <unistd.h>
! 33: #include <err.h>
! 34:
! 35: #include "file.h"
! 36: #include "aparams.h"
! 37: #include "dev.h"
! 38:
! 39:
! 40: /* headerless data files. played at /dev/audio's defaults.
! 41: */
! 42: #define FMT_RAW 0
! 43:
! 44: /* Sun/NeXT .au files. header is skipped and /dev/audio is configured
! 45: * for monaural 8-bit ulaw @ 8kHz, the de facto format for .au files,
! 46: * as well as the historical default configuration for /dev/audio.
! 47: */
! 48: #define FMT_AU 1
! 49:
! 50: /* RIFF WAV files. header is parsed for format details which are
! 51: * applied to /dev/audio.
! 52: */
! 53: #define FMT_WAV 2
! 54:
! 55:
! 56: int
! 57: legacy_play(char *dev, char *aufile)
! 58: {
! 59: struct audio_prinfo ai;
! 60: struct audio_info info;
! 61: struct aparams par;
! 62: ssize_t rd;
! 63: off_t datasz;
! 64: char buf[5120];
! 65: int afd, fd, fmt = FMT_RAW;
! 66: u_int32_t pos = 0;
! 67: char magic[4];
! 68:
! 69: if ((fd = open(aufile, O_RDONLY)) < 0) {
! 70: warn("cannot open %s", aufile);
! 71: return(1);
! 72: }
! 73:
! 74: if (read(fd, magic, sizeof(magic)) != sizeof(magic)) {
! 75: /* read() error, or the file is smaller than sizeof(magic).
! 76: * treat as a raw file, like previous versions of aucat.
! 77: */
! 78: } else if (!strncmp(magic, ".snd", 4)) {
! 79: fmt = FMT_AU;
! 80: if (read(fd, &pos, sizeof(pos)) == sizeof(pos))
! 81: pos = ntohl(pos);
! 82: } else if (!strncmp(magic, "RIFF", 4) &&
! 83: wav_readhdr(fd, &par, &datasz)) {
! 84: fmt = FMT_WAV;
! 85: }
! 86:
! 87: /* seek to start of audio data. wav_readhdr already took care
! 88: * of this for FMT_WAV.
! 89: */
! 90: if (fmt == FMT_RAW || fmt == FMT_AU)
! 91: if (lseek(fd, (off_t)pos, SEEK_SET) == -1)
! 92: warn("lseek");
! 93:
! 94: if ((afd = open(dev, O_WRONLY)) < 0) {
! 95: warn("can't open %s", dev);
! 96: return(1);
! 97: }
! 98:
! 99: AUDIO_INITINFO(&info);
! 100: ai = info.play;
! 101:
! 102: switch(fmt) {
! 103: case FMT_WAV:
! 104: sun_partoinfo(&ai, &par);
! 105: break;
! 106: case FMT_AU:
! 107: ai.encoding = AUDIO_ENCODING_ULAW;
! 108: ai.precision = 8;
! 109: ai.sample_rate = 8000;
! 110: ai.channels = 1;
! 111: break;
! 112: case FMT_RAW:
! 113: default:
! 114: break;
! 115: }
! 116:
! 117: info.play = ai;
! 118: if (ioctl(afd, AUDIO_SETINFO, &info) < 0) {
! 119: warn("%s", dev);
! 120: /* only WAV could fail in previous aucat versions (unless
! 121: * the parameters returned by AUDIO_GETINFO would fail,
! 122: * which is unlikely)
! 123: */
! 124: if (fmt == FMT_WAV)
! 125: return(1);
! 126: }
! 127:
! 128: /* parameters may be silently modified. see audio(9)'s
! 129: * description of set_params. for compatability with previous
! 130: * aucat versions, continue running if something doesn't match.
! 131: */
! 132: (void) ioctl(afd, AUDIO_GETINFO, &info);
! 133: if (info.play.encoding != ai.encoding ||
! 134: info.play.precision != ai.precision ||
! 135: info.play.channels != ai.channels ||
! 136: /* devices may return a very close rate, such as 44099 when
! 137: * 44100 was requested. the difference is inaudible. allow
! 138: * 2% deviation as an example of how to cope.
! 139: */
! 140: (info.play.sample_rate > ai.sample_rate * 1.02 ||
! 141: info.play.sample_rate < ai.sample_rate * 0.98)) {
! 142: warnx("format not supported by %s", dev);
! 143: }
! 144:
! 145: while ((rd = read(fd, buf, sizeof(buf))) > 0)
! 146: if (write(afd, buf, rd) != rd)
! 147: warn("write");
! 148: if (rd == -1)
! 149: warn("read");
! 150:
! 151: (void) close(afd);
! 152: (void) close(fd);
! 153:
! 154: return(0);
! 155: }
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