| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Linux audio play and grab interface | ||
| 3 | * Copyright (c) 2000, 2001 Fabrice Bellard | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "config.h" | ||
| 23 | |||
| 24 | #include <string.h> | ||
| 25 | |||
| 26 | #if HAVE_UNISTD_H | ||
| 27 | #include <unistd.h> | ||
| 28 | #endif | ||
| 29 | #include <fcntl.h> | ||
| 30 | #include <sys/ioctl.h> | ||
| 31 | #include <sys/soundcard.h> | ||
| 32 | |||
| 33 | #include "libavutil/file_open.h" | ||
| 34 | #include "libavutil/log.h" | ||
| 35 | |||
| 36 | #include "avdevice.h" | ||
| 37 | |||
| 38 | #include "oss.h" | ||
| 39 | |||
| 40 | ✗ | int ff_oss_audio_open(AVFormatContext *s1, int is_output, | |
| 41 | const char *audio_device) | ||
| 42 | { | ||
| 43 | ✗ | OSSAudioData *s = s1->priv_data; | |
| 44 | int audio_fd; | ||
| 45 | int tmp, err; | ||
| 46 | ✗ | char *flip = getenv("AUDIO_FLIP_LEFT"); | |
| 47 | |||
| 48 | ✗ | if (is_output) | |
| 49 | ✗ | audio_fd = avpriv_open(audio_device, O_WRONLY); | |
| 50 | else | ||
| 51 | ✗ | audio_fd = avpriv_open(audio_device, O_RDONLY); | |
| 52 | ✗ | if (audio_fd < 0) { | |
| 53 | ✗ | av_log(s1, AV_LOG_ERROR, "%s: %s\n", audio_device, av_err2str(AVERROR(errno))); | |
| 54 | ✗ | return AVERROR(EIO); | |
| 55 | } | ||
| 56 | |||
| 57 | ✗ | if (flip && *flip == '1') { | |
| 58 | ✗ | s->flip_left = 1; | |
| 59 | } | ||
| 60 | |||
| 61 | /* non blocking mode */ | ||
| 62 | ✗ | if (!is_output) { | |
| 63 | ✗ | if (fcntl(audio_fd, F_SETFL, O_NONBLOCK) < 0) { | |
| 64 | ✗ | av_log(s1, AV_LOG_WARNING, "%s: Could not enable non block mode (%s)\n", audio_device, av_err2str(AVERROR(errno))); | |
| 65 | } | ||
| 66 | } | ||
| 67 | |||
| 68 | ✗ | s->frame_size = OSS_AUDIO_BLOCK_SIZE; | |
| 69 | |||
| 70 | #define CHECK_IOCTL_ERROR(event) \ | ||
| 71 | if (err < 0) { \ | ||
| 72 | av_log(s1, AV_LOG_ERROR, #event ": %s\n", av_err2str(AVERROR(errno)));\ | ||
| 73 | goto fail; \ | ||
| 74 | } | ||
| 75 | |||
| 76 | /* select format : favour native format | ||
| 77 | * We don't CHECK_IOCTL_ERROR here because even if failed OSS still may be | ||
| 78 | * usable. If OSS is not usable the SNDCTL_DSP_SETFMTS later is going to | ||
| 79 | * fail anyway. */ | ||
| 80 | ✗ | err = ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &tmp); | |
| 81 | ✗ | if (err < 0) { | |
| 82 | ✗ | av_log(s1, AV_LOG_WARNING, "SNDCTL_DSP_GETFMTS: %s\n", av_err2str(AVERROR(errno))); | |
| 83 | } | ||
| 84 | |||
| 85 | #if HAVE_BIGENDIAN | ||
| 86 | if (tmp & AFMT_S16_BE) { | ||
| 87 | tmp = AFMT_S16_BE; | ||
| 88 | } else if (tmp & AFMT_S16_LE) { | ||
| 89 | tmp = AFMT_S16_LE; | ||
| 90 | } else { | ||
| 91 | tmp = 0; | ||
| 92 | } | ||
| 93 | #else | ||
| 94 | ✗ | if (tmp & AFMT_S16_LE) { | |
| 95 | ✗ | tmp = AFMT_S16_LE; | |
| 96 | ✗ | } else if (tmp & AFMT_S16_BE) { | |
| 97 | ✗ | tmp = AFMT_S16_BE; | |
| 98 | } else { | ||
| 99 | ✗ | tmp = 0; | |
| 100 | } | ||
| 101 | #endif | ||
| 102 | |||
| 103 | ✗ | switch(tmp) { | |
| 104 | ✗ | case AFMT_S16_LE: | |
| 105 | ✗ | s->codec_id = AV_CODEC_ID_PCM_S16LE; | |
| 106 | ✗ | s->sample_size = 2; | |
| 107 | ✗ | break; | |
| 108 | ✗ | case AFMT_S16_BE: | |
| 109 | ✗ | s->codec_id = AV_CODEC_ID_PCM_S16BE; | |
| 110 | ✗ | s->sample_size = 2; | |
| 111 | ✗ | break; | |
| 112 | ✗ | default: | |
| 113 | ✗ | av_log(s1, AV_LOG_ERROR, "Soundcard does not support 16 bit sample format\n"); | |
| 114 | ✗ | close(audio_fd); | |
| 115 | ✗ | return AVERROR(EIO); | |
| 116 | } | ||
| 117 | ✗ | err=ioctl(audio_fd, SNDCTL_DSP_SETFMT, &tmp); | |
| 118 | ✗ | CHECK_IOCTL_ERROR(SNDCTL_DSP_SETFMT) | |
| 119 | |||
| 120 | ✗ | tmp = (s->channels == 2); | |
| 121 | ✗ | err = ioctl(audio_fd, SNDCTL_DSP_STEREO, &tmp); | |
| 122 | ✗ | CHECK_IOCTL_ERROR(SNDCTL_DSP_STEREO) | |
| 123 | |||
| 124 | ✗ | tmp = s->sample_rate; | |
| 125 | ✗ | err = ioctl(audio_fd, SNDCTL_DSP_SPEED, &tmp); | |
| 126 | ✗ | CHECK_IOCTL_ERROR(SNDCTL_DSP_SPEED) | |
| 127 | ✗ | s->sample_rate = tmp; /* store real sample rate */ | |
| 128 | ✗ | s->fd = audio_fd; | |
| 129 | |||
| 130 | ✗ | return 0; | |
| 131 | ✗ | fail: | |
| 132 | ✗ | close(audio_fd); | |
| 133 | ✗ | return AVERROR(EIO); | |
| 134 | #undef CHECK_IOCTL_ERROR | ||
| 135 | } | ||
| 136 | |||
| 137 | ✗ | int ff_oss_audio_close(OSSAudioData *s) | |
| 138 | { | ||
| 139 | ✗ | close(s->fd); | |
| 140 | ✗ | return 0; | |
| 141 | } | ||
| 142 |