1 /*
2 * Copyright (c) 2010 Reimar Döffinger
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20 #include "avformat.h"
21 #include "internal.h"
22 #include "libavutil/intreadwrite.h"
23
24 typedef struct IVFEncContext {
25 unsigned frame_cnt;
26 uint64_t last_pts, sum_delta_pts, last_pkt_duration;
27 } IVFEncContext;
28
ivf_init(AVFormatContext * s)29 static int ivf_init(AVFormatContext *s)
30 {
31 AVCodecParameters *par;
32
33 if (s->nb_streams != 1) {
34 av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
35 return AVERROR(EINVAL);
36 }
37 par = s->streams[0]->codecpar;
38 if (par->codec_type != AVMEDIA_TYPE_VIDEO ||
39 !(par->codec_id == AV_CODEC_ID_AV1 ||
40 par->codec_id == AV_CODEC_ID_VP8 ||
41 par->codec_id == AV_CODEC_ID_VP9)) {
42 av_log(s, AV_LOG_ERROR, "Currently only VP8, VP9 and AV1 are supported!\n");
43 return AVERROR(EINVAL);
44 }
45
46 if (par->codec_id == AV_CODEC_ID_VP9) {
47 int ret = ff_stream_add_bitstream_filter(s->streams[0], "vp9_superframe", NULL);
48 if (ret < 0)
49 return ret;
50 } else if (par->codec_id == AV_CODEC_ID_AV1) {
51 int ret = ff_stream_add_bitstream_filter(s->streams[0], "av1_metadata", "td=insert");
52 if (ret < 0)
53 return ret;
54 }
55
56 return 0;
57 }
58
ivf_write_header(AVFormatContext * s)59 static int ivf_write_header(AVFormatContext *s)
60 {
61 AVCodecParameters *par = s->streams[0]->codecpar;
62 AVIOContext *pb = s->pb;
63
64 avio_write(pb, "DKIF", 4);
65 avio_wl16(pb, 0); // version
66 avio_wl16(pb, 32); // header length
67 avio_wl32(pb,
68 par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") :
69 par->codec_id == AV_CODEC_ID_VP8 ? AV_RL32("VP80") : AV_RL32("AV01"));
70 avio_wl16(pb, par->width);
71 avio_wl16(pb, par->height);
72 avio_wl32(pb, s->streams[0]->time_base.den);
73 avio_wl32(pb, s->streams[0]->time_base.num);
74 avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL); // length is overwritten at the end of muxing
75
76 return 0;
77 }
78
ivf_write_packet(AVFormatContext * s,AVPacket * pkt)79 static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
80 {
81 AVIOContext *pb = s->pb;
82 IVFEncContext *ctx = s->priv_data;
83
84 avio_wl32(pb, pkt->size);
85 avio_wl64(pb, pkt->pts);
86 avio_write(pb, pkt->data, pkt->size);
87 if (ctx->frame_cnt)
88 ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
89 ctx->last_pkt_duration = pkt->duration;
90 ctx->frame_cnt++;
91 ctx->last_pts = pkt->pts;
92
93 return 0;
94 }
95
ivf_write_trailer(AVFormatContext * s)96 static int ivf_write_trailer(AVFormatContext *s)
97 {
98 AVIOContext *pb = s->pb;
99 IVFEncContext *ctx = s->priv_data;
100
101 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
102 (ctx->frame_cnt > 1 || (ctx->frame_cnt == 1 && ctx->last_pkt_duration))) {
103 int64_t end = avio_tell(pb);
104
105 avio_seek(pb, 24, SEEK_SET);
106 // overwrite the "length" field (duration)
107 avio_wl32(pb, ctx->last_pkt_duration ?
108 ctx->sum_delta_pts + ctx->last_pkt_duration :
109 ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
110 avio_wl32(pb, 0); // zero out unused bytes
111 avio_seek(pb, end, SEEK_SET);
112 }
113
114 return 0;
115 }
116
117 static const AVCodecTag codec_ivf_tags[] = {
118 { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
119 { AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
120 { AV_CODEC_ID_AV1, MKTAG('A', 'V', '0', '1') },
121 { AV_CODEC_ID_NONE, 0 }
122 };
123
124 AVOutputFormat ff_ivf_muxer = {
125 .priv_data_size = sizeof(IVFEncContext),
126 .name = "ivf",
127 .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
128 .extensions = "ivf",
129 .audio_codec = AV_CODEC_ID_NONE,
130 .video_codec = AV_CODEC_ID_VP8,
131 .init = ivf_init,
132 .write_header = ivf_write_header,
133 .write_packet = ivf_write_packet,
134 .write_trailer = ivf_write_trailer,
135 .codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
136 };
137