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vc1testenc.c
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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 
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 
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 
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 
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,
94 };