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_AV1 ||
41 par->codec_id == AV_CODEC_ID_VP8 ||
42 par->codec_id == AV_CODEC_ID_VP9)) {
43 av_log(s, AV_LOG_ERROR, "Currently only VP8, VP9 and AV1 are supported!\n");
44 return AVERROR(EINVAL);
46 avio_write(pb, "DKIF", 4);
47 avio_wl16(pb, 0); // version
48 avio_wl16(pb, 32); // header length
50 par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") :
51 par->codec_id == AV_CODEC_ID_VP8 ? AV_RL32("VP80") : AV_RL32("AV01"));
52 avio_wl16(pb, par->width);
53 avio_wl16(pb, par->height);
54 avio_wl32(pb, s->streams[0]->time_base.den);
55 avio_wl32(pb, s->streams[0]->time_base.num);
56 avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL); // length is overwritten at the end of muxing
61 static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
63 AVIOContext *pb = s->pb;
64 IVFEncContext *ctx = s->priv_data;
66 avio_wl32(pb, pkt->size);
67 avio_wl64(pb, pkt->pts);
68 avio_write(pb, pkt->data, pkt->size);
70 ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
72 ctx->last_pts = pkt->pts;
77 static int ivf_write_trailer(AVFormatContext *s)
79 AVIOContext *pb = s->pb;
80 IVFEncContext *ctx = s->priv_data;
82 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && ctx->frame_cnt > 1) {
83 size_t end = avio_tell(pb);
85 avio_seek(pb, 24, SEEK_SET);
86 // overwrite the "length" field (duration)
87 avio_wl32(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
88 avio_wl32(pb, 0); // zero out unused bytes
89 avio_seek(pb, end, SEEK_SET);
95 static int ivf_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
98 AVStream *st = s->streams[pkt->stream_index];
100 if (st->codecpar->codec_id == AV_CODEC_ID_VP9)
101 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
102 else if (st->codecpar->codec_id == AV_CODEC_ID_AV1)
103 ret = ff_stream_add_bitstream_filter(st, "av1_metadata", "td=insert");
108 static const AVCodecTag codec_ivf_tags[] = {
109 { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
110 { AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
111 { AV_CODEC_ID_AV1, MKTAG('A', 'V', '0', '1') },
112 { AV_CODEC_ID_NONE, 0 }
115 AVOutputFormat ff_ivf_muxer = {
116 .priv_data_size = sizeof(IVFEncContext),
118 .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
120 .audio_codec = AV_CODEC_ID_NONE,
121 .video_codec = AV_CODEC_ID_VP8,
122 .write_header = ivf_write_header,
123 .write_packet = ivf_write_packet,
124 .write_trailer = ivf_write_trailer,
125 .check_bitstream = ivf_check_bitstream,
126 .codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },