2 * sndio play and grab interface
3 * Copyright (c) 2010 Jacob Meuser
5 * This file is part of FFmpeg.
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.
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.
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
26 #include "sndio_common.h"
28 static av_cold int audio_write_header(AVFormatContext *s1)
30 SndioData *s = s1->priv_data;
35 s->sample_rate = st->codec->sample_rate;
36 s->channels = st->codec->channels;
38 ret = ff_sndio_open(s1, 1, s1->filename);
43 static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
45 SndioData *s = s1->priv_data;
46 uint8_t *buf= pkt->data;
51 len = FFMIN(s->buffer_size - s->buffer_offset, size);
52 memcpy(s->buffer + s->buffer_offset, buf, len);
55 s->buffer_offset += len;
56 if (s->buffer_offset >= s->buffer_size) {
57 ret = sio_write(s->hdl, s->buffer, s->buffer_size);
58 if (ret == 0 || sio_eof(s->hdl))
68 static int audio_write_trailer(AVFormatContext *s1)
70 SndioData *s = s1->priv_data;
72 sio_write(s->hdl, s->buffer, s->buffer_offset);
79 AVOutputFormat ff_sndio_muxer = {
81 .long_name = NULL_IF_CONFIG_SMALL("sndio audio playback"),
82 .priv_data_size = sizeof(SndioData),
83 /* XXX: we make the assumption that the soundcard accepts this format */
84 /* XXX: find better solution with "preinit" method, needed also in
86 .audio_codec = AV_NE(CODEC_ID_PCM_S16BE, CODEC_ID_PCM_S16LE),
87 .video_codec = CODEC_ID_NONE,
88 .write_header = audio_write_header,
89 .write_packet = audio_write_packet,
90 .write_trailer = audio_write_trailer,
91 .flags = AVFMT_NOFILE,