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1 | /* |
2 | * VC-1 test bitstreams format muxer. | |
3 | * Copyright (c) 2008 Konstantin Shishkov | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | #include "avformat.h" | |
22 | #include "internal.h" | |
23 | ||
24 | typedef struct RCVContext { | |
25 | int frames; | |
26 | } RCVContext; | |
27 | ||
28 | static int vc1test_write_header(AVFormatContext *s) | |
29 | { | |
30 | AVCodecContext *avc = s->streams[0]->codec; | |
31 | AVIOContext *pb = s->pb; | |
32 | ||
33 | if (avc->codec_id != AV_CODEC_ID_WMV3) { | |
34 | av_log(s, AV_LOG_ERROR, "Only WMV3 is accepted!\n"); | |
35 | return -1; | |
36 | } | |
37 | avio_wl24(pb, 0); //frames count will be here | |
38 | avio_w8(pb, 0xC5); | |
39 | avio_wl32(pb, 4); | |
40 | avio_write(pb, avc->extradata, 4); | |
41 | avio_wl32(pb, avc->height); | |
42 | avio_wl32(pb, avc->width); | |
43 | avio_wl32(pb, 0xC); | |
44 | avio_wl24(pb, 0); // hrd_buffer | |
45 | avio_w8(pb, 0x80); // level|cbr|res1 | |
46 | avio_wl32(pb, 0); // hrd_rate | |
47 | if (s->streams[0]->avg_frame_rate.den && s->streams[0]->avg_frame_rate.num == 1) | |
48 | avio_wl32(pb, s->streams[0]->avg_frame_rate.den); | |
49 | else | |
50 | avio_wl32(pb, 0xFFFFFFFF); //variable framerate | |
51 | avpriv_set_pts_info(s->streams[0], 32, 1, 1000); | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
56 | static int vc1test_write_packet(AVFormatContext *s, AVPacket *pkt) | |
57 | { | |
58 | RCVContext *ctx = s->priv_data; | |
59 | AVIOContext *pb = s->pb; | |
60 | ||
61 | if (!pkt->size) | |
62 | return 0; | |
63 | avio_wl32(pb, pkt->size | ((pkt->flags & AV_PKT_FLAG_KEY) ? 0x80000000 : 0)); | |
64 | avio_wl32(pb, pkt->pts); | |
65 | avio_write(pb, pkt->data, pkt->size); | |
66 | ctx->frames++; | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | static int vc1test_write_trailer(AVFormatContext *s) | |
72 | { | |
73 | RCVContext *ctx = s->priv_data; | |
74 | AVIOContext *pb = s->pb; | |
75 | ||
76 | if (s->pb->seekable) { | |
77 | avio_seek(pb, 0, SEEK_SET); | |
78 | avio_wl24(pb, ctx->frames); | |
79 | avio_flush(pb); | |
80 | } | |
81 | return 0; | |
82 | } | |
83 | ||
84 | AVOutputFormat ff_vc1t_muxer = { | |
85 | .name = "vc1test", | |
86 | .long_name = NULL_IF_CONFIG_SMALL("VC-1 test bitstream"), | |
87 | .extensions = "rcv", | |
88 | .priv_data_size = sizeof(RCVContext), | |
89 | .audio_codec = AV_CODEC_ID_NONE, | |
90 | .video_codec = AV_CODEC_ID_WMV3, | |
91 | .write_header = vc1test_write_header, | |
92 | .write_packet = vc1test_write_packet, | |
93 | .write_trailer = vc1test_write_trailer, | |
94 | }; |