1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* Copyright (c) 2010 Reimar Döffinger
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "internal.h"
#include "libavutil/intreadwrite.h"
typedef struct IVFEncContext {
unsigned frame_cnt;
uint64_t last_pts, sum_delta_pts, last_pkt_duration;
} IVFEncContext;
static int ivf_init(AVFormatContext *s)
{
AVCodecParameters *par;
if (s->nb_streams != 1) {
av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
return AVERROR(EINVAL);
}
par = s->streams[0]->codecpar;
if (par->codec_type != AVMEDIA_TYPE_VIDEO ||
!(par->codec_id == AV_CODEC_ID_AV1 ||
par->codec_id == AV_CODEC_ID_VP8 ||
par->codec_id == AV_CODEC_ID_VP9)) {
av_log(s, AV_LOG_ERROR, "Currently only VP8, VP9 and AV1 are supported!\n");
return AVERROR(EINVAL);
}
if (par->codec_id == AV_CODEC_ID_VP9) {
int ret = ff_stream_add_bitstream_filter(s->streams[0], "vp9_superframe", NULL);
if (ret < 0)
return ret;
} else if (par->codec_id == AV_CODEC_ID_AV1) {
int ret = ff_stream_add_bitstream_filter(s->streams[0], "av1_metadata", "td=insert");
if (ret < 0)
return ret;
}
return 0;
}
static int ivf_write_header(AVFormatContext *s)
{
AVCodecParameters *par = s->streams[0]->codecpar;
AVIOContext *pb = s->pb;
avio_write(pb, "DKIF", 4);
avio_wl16(pb, 0); // version
avio_wl16(pb, 32); // header length
avio_wl32(pb,
par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") :
par->codec_id == AV_CODEC_ID_VP8 ? AV_RL32("VP80") : AV_RL32("AV01"));
avio_wl16(pb, par->width);
avio_wl16(pb, par->height);
avio_wl32(pb, s->streams[0]->time_base.den);
avio_wl32(pb, s->streams[0]->time_base.num);
avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL); // length is overwritten at the end of muxing
return 0;
}
static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIOContext *pb = s->pb;
IVFEncContext *ctx = s->priv_data;
avio_wl32(pb, pkt->size);
avio_wl64(pb, pkt->pts);
avio_write(pb, pkt->data, pkt->size);
if (ctx->frame_cnt)
ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
ctx->last_pkt_duration = pkt->duration;
ctx->frame_cnt++;
ctx->last_pts = pkt->pts;
return 0;
}
static int ivf_write_trailer(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
IVFEncContext *ctx = s->priv_data;
if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
(ctx->frame_cnt > 1 || (ctx->frame_cnt == 1 && ctx->last_pkt_duration))) {
int64_t end = avio_tell(pb);
avio_seek(pb, 24, SEEK_SET);
// overwrite the "length" field (duration)
avio_wl32(pb, ctx->last_pkt_duration ?
ctx->sum_delta_pts + ctx->last_pkt_duration :
ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
avio_wl32(pb, 0); // zero out unused bytes
avio_seek(pb, end, SEEK_SET);
}
return 0;
}
static const AVCodecTag codec_ivf_tags[] = {
{ AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
{ AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
{ AV_CODEC_ID_AV1, MKTAG('A', 'V', '0', '1') },
{ AV_CODEC_ID_NONE, 0 }
};
const AVOutputFormat ff_ivf_muxer = {
.priv_data_size = sizeof(IVFEncContext),
.name = "ivf",
.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
.extensions = "ivf",
.audio_codec = AV_CODEC_ID_NONE,
.video_codec = AV_CODEC_ID_VP8,
.init = ivf_init,
.write_header = ivf_write_header,
.write_packet = ivf_write_packet,
.write_trailer = ivf_write_trailer,
.codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
};
|
