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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 | ||
23 | static int ivf_write_header(AVFormatContext *s) | |
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 || | |
34 | !(ctx->codec_id == AV_CODEC_ID_VP8 || ctx->codec_id == AV_CODEC_ID_VP9)) { | |
35 | av_log(s, AV_LOG_ERROR, "Currently only VP8 and VP9 are supported!\n"); | |
36 | return AVERROR(EINVAL); | |
37 | } | |
38 | avio_write(pb, "DKIF", 4); | |
39 | avio_wl16(pb, 0); // version | |
40 | avio_wl16(pb, 32); // header length | |
41 | avio_wl32(pb, ctx->codec_tag ? ctx->codec_tag : AV_RL32("VP80")); | |
42 | avio_wl16(pb, ctx->width); | |
43 | avio_wl16(pb, ctx->height); | |
44 | avio_wl32(pb, s->streams[0]->time_base.den); | |
45 | avio_wl32(pb, s->streams[0]->time_base.num); | |
46 | avio_wl64(pb, s->streams[0]->duration); // TODO: duration or number of frames?!? | |
47 | ||
48 | return 0; | |
49 | } | |
50 | ||
51 | static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt) | |
52 | { | |
53 | AVIOContext *pb = s->pb; | |
54 | avio_wl32(pb, pkt->size); | |
55 | avio_wl64(pb, pkt->pts); | |
56 | avio_write(pb, pkt->data, pkt->size); | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | AVOutputFormat ff_ivf_muxer = { | |
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 | }; |