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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 "libavutil/intreadwrite.h"
22 
24 {
25  AVCodecContext *ctx;
26  AVIOContext *pb = s->pb;
27 
28  if (s->nb_streams != 1) {
29  av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
30  return AVERROR(EINVAL);
31  }
32  ctx = s->streams[0]->codec;
33  if (ctx->codec_type != AVMEDIA_TYPE_VIDEO || ctx->codec_id != AV_CODEC_ID_VP8) {
34  av_log(s, AV_LOG_ERROR, "Currently only VP8 is supported!\n");
35  return AVERROR(EINVAL);
36  }
37  avio_write(pb, "DKIF", 4);
38  avio_wl16(pb, 0); // version
39  avio_wl16(pb, 32); // header length
40  avio_wl32(pb, ctx->codec_tag ? ctx->codec_tag : AV_RL32("VP80"));
41  avio_wl16(pb, ctx->width);
42  avio_wl16(pb, ctx->height);
43  avio_wl32(pb, s->streams[0]->time_base.den);
44  avio_wl32(pb, s->streams[0]->time_base.num);
45  avio_wl64(pb, s->streams[0]->duration); // TODO: duration or number of frames?!?
46 
47  return 0;
48 }
49 
51 {
52  AVIOContext *pb = s->pb;
53  avio_wl32(pb, pkt->size);
54  avio_wl64(pb, pkt->pts);
55  avio_write(pb, pkt->data, pkt->size);
56  avio_flush(pb);
57 
58  return 0;
59 }
60 
62  .name = "ivf",
63  .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
64  .extensions = "ivf",
65  .audio_codec = AV_CODEC_ID_NONE,
66  .video_codec = AV_CODEC_ID_VP8,
67  .write_header = ivf_write_header,
68  .write_packet = ivf_write_packet,
69 };