2 * sndio play and grab interface
3 * Copyright (c) 2010 Jacob Meuser
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "libavutil/internal.h"
27 #include "libavformat/avformat.h"
29 #include "libavdevice/sndio.h"
31 static av_cold int audio_write_header(AVFormatContext *s1)
33 SndioData *s = s1->priv_data;
38 s->sample_rate = st->codec->sample_rate;
39 s->channels = st->codec->channels;
41 ret = ff_sndio_open(s1, 1, s1->filename);
46 static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
48 SndioData *s = s1->priv_data;
49 uint8_t *buf= pkt->data;
54 len = FFMIN(s->buffer_size - s->buffer_offset, size);
55 memcpy(s->buffer + s->buffer_offset, buf, len);
58 s->buffer_offset += len;
59 if (s->buffer_offset >= s->buffer_size) {
60 ret = sio_write(s->hdl, s->buffer, s->buffer_size);
61 if (ret == 0 || sio_eof(s->hdl))
71 static int audio_write_trailer(AVFormatContext *s1)
73 SndioData *s = s1->priv_data;
75 sio_write(s->hdl, s->buffer, s->buffer_offset);
82 AVOutputFormat ff_sndio_muxer = {
84 .long_name = NULL_IF_CONFIG_SMALL("sndio audio playback"),
85 .priv_data_size = sizeof(SndioData),
86 /* XXX: we make the assumption that the soundcard accepts this format */
87 /* XXX: find better solution with "preinit" method, needed also in
89 .audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
90 .video_codec = AV_CODEC_ID_NONE,
91 .write_header = audio_write_header,
92 .write_packet = audio_write_packet,
93 .write_trailer = audio_write_trailer,
94 .flags = AVFMT_NOFILE,