| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Linux audio 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 | #if HAVE_UNISTD_H | ||
| 25 | #include <unistd.h> | ||
| 26 | #endif | ||
| 27 | #include <fcntl.h> | ||
| 28 | #include <sys/ioctl.h> | ||
| 29 | #include <sys/soundcard.h> | ||
| 30 | |||
| 31 | #include "libavutil/internal.h" | ||
| 32 | |||
| 33 | #include "avdevice.h" | ||
| 34 | #include "libavformat/internal.h" | ||
| 35 | #include "libavformat/mux.h" | ||
| 36 | |||
| 37 | #include "oss.h" | ||
| 38 | |||
| 39 | ✗ | static int audio_write_header(AVFormatContext *s1) | |
| 40 | { | ||
| 41 | ✗ | OSSAudioData *s = s1->priv_data; | |
| 42 | AVStream *st; | ||
| 43 | int ret; | ||
| 44 | |||
| 45 | ✗ | st = s1->streams[0]; | |
| 46 | ✗ | s->sample_rate = st->codecpar->sample_rate; | |
| 47 | ✗ | s->channels = st->codecpar->ch_layout.nb_channels; | |
| 48 | ✗ | ret = ff_oss_audio_open(s1, 1, s1->url); | |
| 49 | ✗ | if (ret < 0) { | |
| 50 | ✗ | return AVERROR(EIO); | |
| 51 | } else { | ||
| 52 | ✗ | return 0; | |
| 53 | } | ||
| 54 | } | ||
| 55 | |||
| 56 | ✗ | static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt) | |
| 57 | { | ||
| 58 | ✗ | OSSAudioData *s = s1->priv_data; | |
| 59 | ✗ | const uint8_t *buf = pkt->data; | |
| 60 | int len, ret; | ||
| 61 | ✗ | int size= pkt->size; | |
| 62 | |||
| 63 | ✗ | while (size > 0) { | |
| 64 | ✗ | len = FFMIN(OSS_AUDIO_BLOCK_SIZE - s->buffer_ptr, size); | |
| 65 | ✗ | memcpy(s->buffer + s->buffer_ptr, buf, len); | |
| 66 | ✗ | s->buffer_ptr += len; | |
| 67 | ✗ | if (s->buffer_ptr >= OSS_AUDIO_BLOCK_SIZE) { | |
| 68 | for(;;) { | ||
| 69 | ✗ | ret = write(s->fd, s->buffer, OSS_AUDIO_BLOCK_SIZE); | |
| 70 | ✗ | if (ret > 0) | |
| 71 | ✗ | break; | |
| 72 | ✗ | if (ret < 0 && (errno != EAGAIN && errno != EINTR)) | |
| 73 | ✗ | return AVERROR(EIO); | |
| 74 | } | ||
| 75 | ✗ | s->buffer_ptr = 0; | |
| 76 | } | ||
| 77 | ✗ | buf += len; | |
| 78 | ✗ | size -= len; | |
| 79 | } | ||
| 80 | ✗ | return 0; | |
| 81 | } | ||
| 82 | |||
| 83 | ✗ | static int audio_write_trailer(AVFormatContext *s1) | |
| 84 | { | ||
| 85 | ✗ | OSSAudioData *s = s1->priv_data; | |
| 86 | |||
| 87 | ✗ | ff_oss_audio_close(s); | |
| 88 | ✗ | return 0; | |
| 89 | } | ||
| 90 | |||
| 91 | static const AVClass oss_muxer_class = { | ||
| 92 | .class_name = "OSS outdev", | ||
| 93 | .item_name = av_default_item_name, | ||
| 94 | .version = LIBAVUTIL_VERSION_INT, | ||
| 95 | .category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT, | ||
| 96 | }; | ||
| 97 | |||
| 98 | const FFOutputFormat ff_oss_muxer = { | ||
| 99 | .p.name = "oss", | ||
| 100 | .p.long_name = NULL_IF_CONFIG_SMALL("OSS (Open Sound System) playback"), | ||
| 101 | .priv_data_size = sizeof(OSSAudioData), | ||
| 102 | /* XXX: we make the assumption that the soundcard accepts this format */ | ||
| 103 | /* XXX: find better solution with "preinit" method, needed also in | ||
| 104 | other formats */ | ||
| 105 | .p.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE), | ||
| 106 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 107 | .write_header = audio_write_header, | ||
| 108 | .write_packet = audio_write_packet, | ||
| 109 | .write_trailer = audio_write_trailer, | ||
| 110 | .p.flags = AVFMT_NOFILE, | ||
| 111 | .p.priv_class = &oss_muxer_class, | ||
| 112 | }; | ||
| 113 |