Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavdevice / oss_audio_enc.c
CommitLineData
2ba45a60
DM
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_SOUNDCARD_H
25#include <soundcard.h>
26#else
27#include <sys/soundcard.h>
28#endif
29
30#if HAVE_UNISTD_H
31#include <unistd.h>
32#endif
33#include <fcntl.h>
34#include <sys/ioctl.h>
35
36#include "libavutil/internal.h"
37
38#include "libavcodec/avcodec.h"
39
40#include "avdevice.h"
41#include "libavformat/internal.h"
42
43#include "oss_audio.h"
44
45static int audio_write_header(AVFormatContext *s1)
46{
47 OSSAudioData *s = s1->priv_data;
48 AVStream *st;
49 int ret;
50
51 st = s1->streams[0];
52 s->sample_rate = st->codec->sample_rate;
53 s->channels = st->codec->channels;
54 ret = ff_oss_audio_open(s1, 1, s1->filename);
55 if (ret < 0) {
56 return AVERROR(EIO);
57 } else {
58 return 0;
59 }
60}
61
62static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
63{
64 OSSAudioData *s = s1->priv_data;
65 int len, ret;
66 int size= pkt->size;
67 uint8_t *buf= pkt->data;
68
69 while (size > 0) {
70 len = FFMIN(OSS_AUDIO_BLOCK_SIZE - s->buffer_ptr, size);
71 memcpy(s->buffer + s->buffer_ptr, buf, len);
72 s->buffer_ptr += len;
73 if (s->buffer_ptr >= OSS_AUDIO_BLOCK_SIZE) {
74 for(;;) {
75 ret = write(s->fd, s->buffer, OSS_AUDIO_BLOCK_SIZE);
76 if (ret > 0)
77 break;
78 if (ret < 0 && (errno != EAGAIN && errno != EINTR))
79 return AVERROR(EIO);
80 }
81 s->buffer_ptr = 0;
82 }
83 buf += len;
84 size -= len;
85 }
86 return 0;
87}
88
89static int audio_write_trailer(AVFormatContext *s1)
90{
91 OSSAudioData *s = s1->priv_data;
92
93 ff_oss_audio_close(s);
94 return 0;
95}
96
97static const AVClass oss_muxer_class = {
98 .class_name = "OSS muxer",
99 .item_name = av_default_item_name,
100 .version = LIBAVUTIL_VERSION_INT,
101 .category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
102};
103
104AVOutputFormat ff_oss_muxer = {
105 .name = "oss",
106 .long_name = NULL_IF_CONFIG_SMALL("OSS (Open Sound System) playback"),
107 .priv_data_size = sizeof(OSSAudioData),
108 /* XXX: we make the assumption that the soundcard accepts this format */
109 /* XXX: find better solution with "preinit" method, needed also in
110 other formats */
111 .audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
112 .video_codec = AV_CODEC_ID_NONE,
113 .write_header = audio_write_header,
114 .write_packet = audio_write_packet,
115 .write_trailer = audio_write_trailer,
116 .flags = AVFMT_NOFILE,
117 .priv_class = &oss_muxer_class,
118};