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69 lines
2.2 KiB
69 lines
2.2 KiB
/* |
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* Copyright (c) 2010 Reimar Döffinger |
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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 "avformat.h" |
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#include "libavutil/intreadwrite.h" |
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static int ivf_write_header(AVFormatContext *s) |
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{ |
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AVCodecContext *ctx; |
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AVIOContext *pb = s->pb; |
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if (s->nb_streams != 1) { |
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av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n"); |
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return AVERROR(EINVAL); |
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} |
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ctx = s->streams[0]->codec; |
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if (ctx->codec_type != AVMEDIA_TYPE_VIDEO || ctx->codec_id != CODEC_ID_VP8) { |
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av_log(s, AV_LOG_ERROR, "Currently only VP8 is supported!\n"); |
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return AVERROR(EINVAL); |
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} |
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avio_write(pb, "DKIF", 4); |
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avio_wl16(pb, 0); // version |
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avio_wl16(pb, 32); // header length |
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avio_wl32(pb, ctx->codec_tag ? ctx->codec_tag : AV_RL32("VP80")); |
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avio_wl16(pb, ctx->width); |
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avio_wl16(pb, ctx->height); |
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avio_wl32(pb, s->streams[0]->time_base.den); |
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avio_wl32(pb, s->streams[0]->time_base.num); |
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avio_wl64(pb, s->streams[0]->duration); // TODO: duration or number of frames?!? |
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return 0; |
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} |
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static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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AVIOContext *pb = s->pb; |
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avio_wl32(pb, pkt->size); |
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avio_wl64(pb, pkt->pts); |
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avio_write(pb, pkt->data, pkt->size); |
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put_flush_packet(pb); |
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return 0; |
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} |
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AVOutputFormat ff_ivf_muxer = { |
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.name = "ivf", |
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.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"), |
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.extensions = "ivf", |
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.audio_codec = CODEC_ID_NONE, |
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.video_codec = CODEC_ID_VP8, |
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.write_header = ivf_write_header, |
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.write_packet = ivf_write_packet, |
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};
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