0,0 → 1,92 |
/* |
* 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 "avdevice.h" |
#include "sndio_common.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->codec->sample_rate; |
s->channels = st->codec->channels; |
|
ret = ff_sndio_open(s1, 1, s1->filename); |
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return ret; |
} |
|
static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt) |
{ |
SndioData *s = s1->priv_data; |
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; |
} |
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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; |
} |
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AVOutputFormat ff_sndio_muxer = { |
.name = "sndio", |
.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 */ |
.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE), |
.video_codec = AV_CODEC_ID_NONE, |
.write_header = audio_write_header, |
.write_packet = audio_write_packet, |
.write_trailer = audio_write_trailer, |
.flags = AVFMT_NOFILE, |
}; |