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118 lines
3.7 KiB
118 lines
3.7 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 "internal.h" |
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#include "libavutil/intreadwrite.h" |
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typedef struct IVFEncContext { |
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unsigned frame_cnt; |
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uint64_t last_pts, sum_delta_pts; |
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} IVFEncContext; |
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static int ivf_write_header(AVFormatContext *s) |
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{ |
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AVCodecParameters *par; |
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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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par = s->streams[0]->codecpar; |
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if (par->codec_type != AVMEDIA_TYPE_VIDEO || |
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!(par->codec_id == AV_CODEC_ID_VP8 || par->codec_id == AV_CODEC_ID_VP9)) { |
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av_log(s, AV_LOG_ERROR, "Currently only VP8 and VP9 are 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, par->codec_tag ? par->codec_tag : par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") : AV_RL32("VP80")); |
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avio_wl16(pb, par->width); |
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avio_wl16(pb, par->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, 0xFFFFFFFFFFFFFFFFULL); |
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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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IVFEncContext *ctx = s->priv_data; |
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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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if (ctx->frame_cnt) |
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ctx->sum_delta_pts += pkt->pts - ctx->last_pts; |
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ctx->frame_cnt++; |
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ctx->last_pts = pkt->pts; |
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return 0; |
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} |
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static int ivf_write_trailer(AVFormatContext *s) |
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{ |
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AVIOContext *pb = s->pb; |
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IVFEncContext *ctx = s->priv_data; |
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if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && ctx->frame_cnt > 1) { |
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size_t end = avio_tell(pb); |
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avio_seek(pb, 24, SEEK_SET); |
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avio_wl64(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1)); |
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avio_seek(pb, end, SEEK_SET); |
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} |
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return 0; |
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} |
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static int ivf_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt) |
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{ |
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int ret = 1; |
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AVStream *st = s->streams[pkt->stream_index]; |
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if (st->codecpar->codec_id == AV_CODEC_ID_VP9) |
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ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL); |
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return ret; |
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} |
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static const AVCodecTag codec_ivf_tags[] = { |
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{ AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') }, |
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{ AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') }, |
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{ AV_CODEC_ID_NONE, 0 } |
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}; |
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AVOutputFormat ff_ivf_muxer = { |
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.priv_data_size = sizeof(IVFEncContext), |
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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 = AV_CODEC_ID_NONE, |
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.video_codec = AV_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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.write_trailer = ivf_write_trailer, |
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.check_bitstream = ivf_check_bitstream, |
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.codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 }, |
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};
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