yading@11: /*
yading@11:  * Copyright (c) 2010 Reimar Döffinger
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: #include "avformat.h"
yading@11: #include "libavutil/intreadwrite.h"
yading@11: 
yading@11: static int ivf_write_header(AVFormatContext *s)
yading@11: {
yading@11:     AVCodecContext *ctx;
yading@11:     AVIOContext *pb = s->pb;
yading@11: 
yading@11:     if (s->nb_streams != 1) {
yading@11:         av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11:     ctx = s->streams[0]->codec;
yading@11:     if (ctx->codec_type != AVMEDIA_TYPE_VIDEO || ctx->codec_id != AV_CODEC_ID_VP8) {
yading@11:         av_log(s, AV_LOG_ERROR, "Currently only VP8 is supported!\n");
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11:     avio_write(pb, "DKIF", 4);
yading@11:     avio_wl16(pb, 0); // version
yading@11:     avio_wl16(pb, 32); // header length
yading@11:     avio_wl32(pb, ctx->codec_tag ? ctx->codec_tag : AV_RL32("VP80"));
yading@11:     avio_wl16(pb, ctx->width);
yading@11:     avio_wl16(pb, ctx->height);
yading@11:     avio_wl32(pb, s->streams[0]->time_base.den);
yading@11:     avio_wl32(pb, s->streams[0]->time_base.num);
yading@11:     avio_wl64(pb, s->streams[0]->duration); // TODO: duration or number of frames?!?
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     avio_wl32(pb, pkt->size);
yading@11:     avio_wl64(pb, pkt->pts);
yading@11:     avio_write(pb, pkt->data, pkt->size);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: AVOutputFormat ff_ivf_muxer = {
yading@11:     .name         = "ivf",
yading@11:     .long_name    = NULL_IF_CONFIG_SMALL("On2 IVF"),
yading@11:     .extensions   = "ivf",
yading@11:     .audio_codec  = AV_CODEC_ID_NONE,
yading@11:     .video_codec  = AV_CODEC_ID_VP8,
yading@11:     .write_header = ivf_write_header,
yading@11:     .write_packet = ivf_write_packet,
yading@11: };