1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* sndio play and grab interface
* Copyright (c) 2010 Jacob Meuser
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <sndio.h>
#include "libavutil/internal.h"
#include "libavformat/mux.h"
#include "libavdevice/avdevice.h"
#include "libavdevice/sndio.h"
static av_cold int audio_write_header(AVFormatContext *s1)
{
SndioData *s = s1->priv_data;
AVStream *st;
int ret;
st = s1->streams[0];
s->sample_rate = st->codecpar->sample_rate;
s->channels = st->codecpar->ch_layout.nb_channels;
ret = ff_sndio_open(s1, 1, s1->url);
return ret;
}
static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
{
SndioData *s = s1->priv_data;
const uint8_t *buf = pkt->data;
int size = pkt->size;
int len, ret;
while (size > 0) {
len = FFMIN(s->buffer_size - s->buffer_offset, size);
memcpy(s->buffer + s->buffer_offset, buf, len);
buf += len;
size -= len;
s->buffer_offset += len;
if (s->buffer_offset >= s->buffer_size) {
ret = sio_write(s->hdl, s->buffer, s->buffer_size);
if (ret == 0 || sio_eof(s->hdl))
return AVERROR(EIO);
s->softpos += ret;
s->buffer_offset = 0;
}
}
return 0;
}
static int audio_write_trailer(AVFormatContext *s1)
{
SndioData *s = s1->priv_data;
sio_write(s->hdl, s->buffer, s->buffer_offset);
ff_sndio_close(s);
return 0;
}
static const AVClass sndio_muxer_class = {
.class_name = "sndio outdev",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
};
const FFOutputFormat ff_sndio_muxer = {
.p.name = "sndio",
.p.long_name = NULL_IF_CONFIG_SMALL("sndio audio playback"),
.priv_data_size = sizeof(SndioData),
/* XXX: we make the assumption that the soundcard accepts this format */
/* XXX: find better solution with "preinit" method, needed also in
other formats */
.p.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
.p.video_codec = AV_CODEC_ID_NONE,
.write_header = audio_write_header,
.write_packet = audio_write_packet,
.write_trailer = audio_write_trailer,
.p.flags = AVFMT_NOFILE,
.p.priv_class = &sndio_muxer_class,
};
|
