ffmpeg / libavformat / ivfenc.c @ b2ed95ec
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/*
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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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ByteIOContext *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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put_buffer(pb, "DKIF", 4); |
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put_le16(pb, 0); // version |
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put_le16(pb, 32); // header length |
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put_le32(pb, ctx->codec_tag ? ctx->codec_tag : AV_RL32("VP80"));
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put_le16(pb, ctx->width); |
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put_le16(pb, ctx->height); |
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put_le32(pb, s->streams[0]->time_base.den);
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put_le32(pb, s->streams[0]->time_base.num);
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put_le64(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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ByteIOContext *pb = s->pb; |
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put_le32(pb, pkt->size); |
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put_le64(pb, pkt->pts); |
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put_buffer(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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}; |