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104 lines
3.1 KiB
104 lines
3.1 KiB
/* |
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* sndio play and grab interface |
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* Copyright (c) 2010 Jacob Meuser |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <stdint.h> |
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#include <sndio.h> |
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#include "libavutil/internal.h" |
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#include "libavformat/mux.h" |
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#include "libavdevice/avdevice.h" |
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#include "libavdevice/sndio.h" |
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static av_cold int audio_write_header(AVFormatContext *s1) |
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{ |
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SndioData *s = s1->priv_data; |
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AVStream *st; |
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int ret; |
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st = s1->streams[0]; |
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s->sample_rate = st->codecpar->sample_rate; |
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s->channels = st->codecpar->ch_layout.nb_channels; |
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ret = ff_sndio_open(s1, 1, s1->url); |
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return ret; |
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} |
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static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt) |
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{ |
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SndioData *s = s1->priv_data; |
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const uint8_t *buf = pkt->data; |
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int size = pkt->size; |
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int len, ret; |
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while (size > 0) { |
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len = FFMIN(s->buffer_size - s->buffer_offset, size); |
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memcpy(s->buffer + s->buffer_offset, buf, len); |
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buf += len; |
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size -= len; |
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s->buffer_offset += len; |
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if (s->buffer_offset >= s->buffer_size) { |
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ret = sio_write(s->hdl, s->buffer, s->buffer_size); |
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if (ret == 0 || sio_eof(s->hdl)) |
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return AVERROR(EIO); |
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s->softpos += ret; |
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s->buffer_offset = 0; |
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} |
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} |
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return 0; |
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} |
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static int audio_write_trailer(AVFormatContext *s1) |
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{ |
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SndioData *s = s1->priv_data; |
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sio_write(s->hdl, s->buffer, s->buffer_offset); |
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ff_sndio_close(s); |
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return 0; |
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} |
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static const AVClass sndio_muxer_class = { |
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.class_name = "sndio outdev", |
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.item_name = av_default_item_name, |
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.version = LIBAVUTIL_VERSION_INT, |
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.category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT, |
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}; |
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const FFOutputFormat ff_sndio_muxer = { |
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.p.name = "sndio", |
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.p.long_name = NULL_IF_CONFIG_SMALL("sndio audio playback"), |
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.priv_data_size = sizeof(SndioData), |
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/* XXX: we make the assumption that the soundcard accepts this format */ |
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/* XXX: find better solution with "preinit" method, needed also in |
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other formats */ |
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.p.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE), |
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.p.video_codec = AV_CODEC_ID_NONE, |
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.write_header = audio_write_header, |
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.write_packet = audio_write_packet, |
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.write_trailer = audio_write_trailer, |
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.p.flags = AVFMT_NOFILE, |
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.p.priv_class = &sndio_muxer_class, |
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};
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