FFmpeg  4.3.8
ivfenc.c
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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;
28 
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 
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 
80 {
81  AVIOContext *pb = s->pb;
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->frame_cnt++;
90  ctx->last_pts = pkt->pts;
91 
92  return 0;
93 }
94 
96 {
97  AVIOContext *pb = s->pb;
99 
100  if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && ctx->frame_cnt > 1) {
101  int64_t end = avio_tell(pb);
102 
103  avio_seek(pb, 24, SEEK_SET);
104  // overwrite the "length" field (duration)
105  avio_wl32(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
106  avio_wl32(pb, 0); // zero out unused bytes
107  avio_seek(pb, end, SEEK_SET);
108  }
109 
110  return 0;
111 }
112 
113 static const AVCodecTag codec_ivf_tags[] = {
114  { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
115  { AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
116  { AV_CODEC_ID_AV1, MKTAG('A', 'V', '0', '1') },
117  { AV_CODEC_ID_NONE, 0 }
118 };
119 
121  .priv_data_size = sizeof(IVFEncContext),
122  .name = "ivf",
123  .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
124  .extensions = "ivf",
125  .audio_codec = AV_CODEC_ID_NONE,
126  .video_codec = AV_CODEC_ID_VP8,
127  .init = ivf_init,
128  .write_header = ivf_write_header,
129  .write_packet = ivf_write_packet,
130  .write_trailer = ivf_write_trailer,
131  .codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
132 };
#define NULL
Definition: coverity.c:32
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:447
Bytestream IO Context.
Definition: avio.h:161
static int ivf_write_header(AVFormatContext *s)
Definition: ivfenc.c:59
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int num
Numerator.
Definition: rational.h:59
int size
Definition: packet.h:356
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
AVOutputFormat ff_ivf_muxer
Definition: ivfenc.c:120
static AVPacket pkt
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
static int ivf_init(AVFormatContext *s)
Definition: ivfenc.c:29
static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ivfenc.c:79
Format I/O context.
Definition: avformat.h:1351
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:367
int width
Video only.
Definition: codec_par.h:126
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:550
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
uint8_t * data
Definition: packet.h:355
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:213
static const AVCodecTag codec_ivf_tags[]
Definition: ivfenc.c:113
#define av_log(a,...)
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:435
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
const char * name
Definition: qsvenc.c:46
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_RL32
Definition: intreadwrite.h:146
static int ivf_write_trailer(AVFormatContext *s)
Definition: ivfenc.c:95
uint64_t sum_delta_pts
Definition: ivfenc.c:26
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
long long int64_t
Definition: coverity.c:34
unsigned frame_cnt
Definition: ivfenc.c:25
Main libavformat public API header.
int den
Denominator.
Definition: rational.h:60
uint64_t last_pts
Definition: ivfenc.c:26
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: utils.c:5579
void * priv_data
Format private data.
Definition: avformat.h:1379
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
#define MKTAG(a, b, c, d)
Definition: common.h:406
This structure stores compressed data.
Definition: packet.h:332
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348