2 * VC-1 test bitstreams format muxer.
3 * Copyright (c) 2008 Konstantin Shishkov
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 typedef struct RCVContext {
28 static int vc1test_write_header(AVFormatContext *s)
30 AVCodecContext *avc = s->streams[0]->codec;
31 AVIOContext *pb = s->pb;
33 if (avc->codec_id != CODEC_ID_WMV3) {
34 av_log(s, AV_LOG_ERROR, "Only WMV3 is accepted!\n");
37 avio_wl24(pb, 0); //frames count will be here
40 avio_write(pb, avc->extradata, 4);
41 avio_wl32(pb, avc->height);
42 avio_wl32(pb, avc->width);
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]->r_frame_rate.den && s->streams[0]->r_frame_rate.num == 1)
48 avio_wl32(pb, s->streams[0]->r_frame_rate.den);
50 avio_wl32(pb, 0xFFFFFFFF); //variable framerate
51 avpriv_set_pts_info(s->streams[0], 32, 1, 1000);
56 static int vc1test_write_packet(AVFormatContext *s, AVPacket *pkt)
58 RCVContext *ctx = s->priv_data;
59 AVIOContext *pb = s->pb;
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);
72 static int vc1test_write_trailer(AVFormatContext *s)
74 RCVContext *ctx = s->priv_data;
75 AVIOContext *pb = s->pb;
77 if (s->pb->seekable) {
78 avio_seek(pb, 0, SEEK_SET);
79 avio_wl24(pb, ctx->frames);
85 AVOutputFormat ff_vc1t_muxer = {
87 .long_name = NULL_IF_CONFIG_SMALL("VC-1 test bitstream"),
90 .priv_data_size = sizeof(RCVContext),
91 .audio_codec = CODEC_ID_NONE,
92 .video_codec = CODEC_ID_WMV3,
93 .write_header = vc1test_write_header,
94 .write_packet = vc1test_write_packet,
95 .write_trailer = vc1test_write_trailer,