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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_VP8 || par->codec_id == AV_CODEC_ID_VP9)) {
41  av_log(s, AV_LOG_ERROR, "Currently only VP8 and VP9 are supported!\n");
42  return AVERROR(EINVAL);
43  }
44  avio_write(pb, "DKIF", 4);
45  avio_wl16(pb, 0); // version
46  avio_wl16(pb, 32); // header length
47  avio_wl32(pb, par->codec_tag ? par->codec_tag : par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") : AV_RL32("VP80"));
48  avio_wl16(pb, par->width);
49  avio_wl16(pb, par->height);
50  avio_wl32(pb, s->streams[0]->time_base.den);
51  avio_wl32(pb, s->streams[0]->time_base.num);
52  avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL);
53 
54  return 0;
55 }
56 
58 {
59  AVIOContext *pb = s->pb;
61 
62  avio_wl32(pb, pkt->size);
63  avio_wl64(pb, pkt->pts);
64  avio_write(pb, pkt->data, pkt->size);
65  if (ctx->frame_cnt)
66  ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
67  ctx->frame_cnt++;
68  ctx->last_pts = pkt->pts;
69 
70  return 0;
71 }
72 
74 {
75  AVIOContext *pb = s->pb;
77 
78  if (pb->seekable && ctx->frame_cnt > 1) {
79  size_t end = avio_tell(pb);
80 
81  avio_seek(pb, 24, SEEK_SET);
82  avio_wl64(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
83  avio_seek(pb, end, SEEK_SET);
84  }
85 
86  return 0;
87 }
88 
89 static int ivf_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
90 {
91  int ret = 1;
92  AVStream *st = s->streams[pkt->stream_index];
93 
94  if (st->codecpar->codec_id == AV_CODEC_ID_VP9)
95  ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
96 
97  return ret;
98 }
99 
100 static const AVCodecTag codec_ivf_tags[] = {
101  { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
102  { AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
103  { AV_CODEC_ID_NONE, 0 }
104 };
105 
107  .priv_data_size = sizeof(IVFEncContext),
108  .name = "ivf",
109  .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
110  .extensions = "ivf",
111  .audio_codec = AV_CODEC_ID_NONE,
112  .video_codec = AV_CODEC_ID_VP8,
113  .write_header = ivf_write_header,
114  .write_packet = ivf_write_packet,
115  .write_trailer = ivf_write_trailer,
116  .check_bitstream = ivf_check_bitstream,
117  .codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
118 };
#define NULL
Definition: coverity.c:32
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:446
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
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:3987
int num
Numerator.
Definition: rational.h:59
int size
Definition: avcodec.h:1608
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
AVOutputFormat ff_ivf_muxer
Definition: ivfenc.c:106
static AVPacket pkt
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3979
static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ivfenc.c:57
Format I/O context.
Definition: avformat.h:1338
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:346
int width
Video only.
Definition: avcodec.h:4053
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:565
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1406
uint8_t * data
Definition: avcodec.h:1607
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
static const AVCodecTag codec_ivf_tags[]
Definition: ivfenc.c:100
#define av_log(a,...)
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:434
#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:176
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3983
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1394
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
AVFormatContext * ctx
Definition: movenc.c:48
static int ivf_write_trailer(AVFormatContext *s)
Definition: ivfenc.c:73
Stream structure.
Definition: avformat.h:889
uint64_t sum_delta_pts
Definition: ivfenc.c:26
AVIOContext * pb
I/O context.
Definition: avformat.h:1380
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:5168
void * priv_data
Format private data.
Definition: avformat.h:1366
AVCodecParameters * codecpar
Definition: avformat.h:1241
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3991
int stream_index
Definition: avcodec.h:1609
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
#define MKTAG(a, b, c, d)
Definition: common.h:342
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1584
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1600
static int ivf_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
Definition: ivfenc.c:89
const char * name
Definition: opengl_enc.c:103