/* * 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 "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->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; 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, }; 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, .priv_class = &sndio_muxer_class, };