FFmpeg  4.0
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  AVIOContext *pb = s->pb;
33 
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);
37  }
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);
45  }
46  avio_write(pb, "DKIF", 4);
47  avio_wl16(pb, 0); // version
48  avio_wl16(pb, 32); // header length
49  avio_wl32(pb, par->codec_tag ? par->codec_tag :
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);
57 
58  return 0;
59 }
60 
62 {
63  AVIOContext *pb = s->pb;
65 
66  avio_wl32(pb, pkt->size);
67  avio_wl64(pb, pkt->pts);
68  avio_write(pb, pkt->data, pkt->size);
69  if (ctx->frame_cnt)
70  ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
71  ctx->frame_cnt++;
72  ctx->last_pts = pkt->pts;
73 
74  return 0;
75 }
76 
78 {
79  AVIOContext *pb = s->pb;
81 
82  if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && ctx->frame_cnt > 1) {
83  size_t end = avio_tell(pb);
84 
85  avio_seek(pb, 24, SEEK_SET);
86  avio_wl64(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
87  avio_seek(pb, end, SEEK_SET);
88  }
89 
90  return 0;
91 }
92 
93 static int ivf_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
94 {
95  int ret = 1;
96  AVStream *st = s->streams[pkt->stream_index];
97 
98  if (st->codecpar->codec_id == AV_CODEC_ID_VP9)
99  ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
100 
101  return ret;
102 }
103 
104 static const AVCodecTag codec_ivf_tags[] = {
105  { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
106  { AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
107  { AV_CODEC_ID_AV1, MKTAG('A', 'V', '0', '1') },
108  { AV_CODEC_ID_NONE, 0 }
109 };
110 
112  .priv_data_size = sizeof(IVFEncContext),
113  .name = "ivf",
114  .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
115  .extensions = "ivf",
116  .audio_codec = AV_CODEC_ID_NONE,
117  .video_codec = AV_CODEC_ID_VP8,
118  .write_header = ivf_write_header,
119  .write_packet = ivf_write_packet,
120  .write_trailer = ivf_write_trailer,
121  .check_bitstream = ivf_check_bitstream,
122  .codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
123 };
const char * name
Definition: avisynth_c.h:775
#define NULL
Definition: coverity.c:32
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:469
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:161
static int ivf_write_header(AVFormatContext *s)
Definition: ivfenc.c:29
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
int num
Numerator.
Definition: rational.h:59
int size
Definition: avcodec.h:1431
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
AVOutputFormat ff_ivf_muxer
Definition: ivfenc.c:111
static AVPacket pkt
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3876
static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ivfenc.c:61
Format I/O context.
Definition: avformat.h:1342
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:369
int width
Video only.
Definition: avcodec.h:3950
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:548
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1410
uint8_t * data
Definition: avcodec.h:1430
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:218
static const AVCodecTag codec_ivf_tags[]
Definition: ivfenc.c:104
#define av_log(a,...)
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:457
#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:186
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1398
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 AV_RL32
Definition: intreadwrite.h:146
static int ivf_write_trailer(AVFormatContext *s)
Definition: ivfenc.c:77
Stream structure.
Definition: avformat.h:873
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:1384
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:5474
void * priv_data
Format private data.
Definition: avformat.h:1370
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1020
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3888
int stream_index
Definition: avcodec.h:1432
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:902
#define MKTAG(a, b, c, d)
Definition: common.h:366
This structure stores compressed data.
Definition: avcodec.h:1407
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1423
static int ivf_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
Definition: ivfenc.c:93