2 * Copyright (c) 2010 Reimar Döffinger
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/intreadwrite.h"
24 typedef struct IVFEncContext {
26 uint64_t last_pts, sum_delta_pts;
29 static int ivf_write_header(AVFormatContext *s)
31 AVCodecParameters *par;
32 AVIOContext *pb = s->pb;
34 if (s->nb_streams != 1) {
35 av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
36 return AVERROR(EINVAL);
38 par = s->streams[0]->codecpar;
39 if (par->codec_type != AVMEDIA_TYPE_VIDEO ||
40 !(par->codec_id == AV_CODEC_ID_VP8 || par->codec_id == AV_CODEC_ID_VP9)) {
41 av_log(s, AV_LOG_ERROR, "Currently only VP8 and VP9 are supported!\n");
42 return AVERROR(EINVAL);
44 avio_write(pb, "DKIF", 4);
45 avio_wl16(pb, 0); // version
46 avio_wl16(pb, 32); // header length
47 avio_wl32(pb, par->codec_tag ? par->codec_tag : par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") : AV_RL32("VP80"));
48 avio_wl16(pb, par->width);
49 avio_wl16(pb, par->height);
50 avio_wl32(pb, s->streams[0]->time_base.den);
51 avio_wl32(pb, s->streams[0]->time_base.num);
52 avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL);
57 static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
59 AVIOContext *pb = s->pb;
60 IVFEncContext *ctx = s->priv_data;
62 avio_wl32(pb, pkt->size);
63 avio_wl64(pb, pkt->pts);
64 avio_write(pb, pkt->data, pkt->size);
66 ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
68 ctx->last_pts = pkt->pts;
73 static int ivf_write_trailer(AVFormatContext *s)
75 AVIOContext *pb = s->pb;
76 IVFEncContext *ctx = s->priv_data;
78 if (pb->seekable && ctx->frame_cnt > 1) {
79 size_t end = avio_tell(pb);
81 avio_seek(pb, 24, SEEK_SET);
82 avio_wl64(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
83 avio_seek(pb, end, SEEK_SET);
89 static int ivf_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
92 AVStream *st = s->streams[pkt->stream_index];
94 if (st->codecpar->codec_id == AV_CODEC_ID_VP9)
95 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
100 AVOutputFormat ff_ivf_muxer = {
101 .priv_data_size = sizeof(IVFEncContext),
103 .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
105 .audio_codec = AV_CODEC_ID_NONE,
106 .video_codec = AV_CODEC_ID_VP8,
107 .write_header = ivf_write_header,
108 .write_packet = ivf_write_packet,
109 .write_trailer = ivf_write_trailer,
110 .check_bitstream = ivf_check_bitstream,