| /* |
| * VC-1 test bitstreams format muxer. |
| * Copyright (c) 2008 Konstantin Shishkov |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "avformat.h" |
| #include "internal.h" |
| |
| typedef struct RCVContext { |
| int frames; |
| } RCVContext; |
| |
| static int vc1test_write_header(AVFormatContext *s) |
| { |
| AVCodecParameters *par = s->streams[0]->codecpar; |
| AVIOContext *pb = s->pb; |
| |
| if (par->codec_id != AV_CODEC_ID_WMV3) { |
| av_log(s, AV_LOG_ERROR, "Only WMV3 is accepted!\n"); |
| return -1; |
| } |
| avio_wl24(pb, 0); //frames count will be here |
| avio_w8(pb, 0xC5); |
| avio_wl32(pb, 4); |
| avio_write(pb, par->extradata, 4); |
| avio_wl32(pb, par->height); |
| avio_wl32(pb, par->width); |
| avio_wl32(pb, 0xC); |
| avio_wl24(pb, 0); // hrd_buffer |
| avio_w8(pb, 0x80); // level|cbr|res1 |
| avio_wl32(pb, 0); // hrd_rate |
| if (s->streams[0]->avg_frame_rate.den && s->streams[0]->avg_frame_rate.num == 1) |
| avio_wl32(pb, s->streams[0]->avg_frame_rate.den); |
| else |
| avio_wl32(pb, 0xFFFFFFFF); //variable framerate |
| avpriv_set_pts_info(s->streams[0], 32, 1, 1000); |
| |
| return 0; |
| } |
| |
| static int vc1test_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| RCVContext *ctx = s->priv_data; |
| AVIOContext *pb = s->pb; |
| |
| if (!pkt->size) |
| return 0; |
| avio_wl32(pb, pkt->size | ((pkt->flags & AV_PKT_FLAG_KEY) ? 0x80000000 : 0)); |
| avio_wl32(pb, pkt->pts); |
| avio_write(pb, pkt->data, pkt->size); |
| ctx->frames++; |
| |
| return 0; |
| } |
| |
| static int vc1test_write_trailer(AVFormatContext *s) |
| { |
| RCVContext *ctx = s->priv_data; |
| AVIOContext *pb = s->pb; |
| |
| if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) { |
| avio_seek(pb, 0, SEEK_SET); |
| avio_wl24(pb, ctx->frames); |
| } |
| return 0; |
| } |
| |
| AVOutputFormat ff_vc1t_muxer = { |
| .name = "vc1test", |
| .long_name = NULL_IF_CONFIG_SMALL("VC-1 test bitstream"), |
| .extensions = "rcv", |
| .priv_data_size = sizeof(RCVContext), |
| .audio_codec = AV_CODEC_ID_NONE, |
| .video_codec = AV_CODEC_ID_WMV3, |
| .write_header = vc1test_write_header, |
| .write_packet = vc1test_write_packet, |
| .write_trailer = vc1test_write_trailer, |
| }; |