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 23typedef struct RCVContext { 24 int frames; 25} RCVContext; 26 27static int vc1test_write_header(AVFormatContext *s) 28{ 29 AVCodecContext *avc = s->streams[0]->codec; 30 ByteIOContext *pb = s->pb; 31 32 if (avc->codec_id != CODEC_ID_WMV3) { 33 av_log(s, AV_LOG_ERROR, "Only WMV3 is accepted!\n"); 34 return -1; 35 } 36 put_le24(pb, 0); //frames count will be here 37 put_byte(pb, 0xC5); 38 put_le32(pb, 4); 39 put_buffer(pb, avc->extradata, 4); 40 put_le32(pb, avc->height); 41 put_le32(pb, avc->width); 42 put_le32(pb, 0xC); 43 put_le24(pb, 0); // hrd_buffer 44 put_byte(pb, 0x80); // level|cbr|res1 45 put_le32(pb, 0); // hrd_rate 46 if (s->streams[0]->r_frame_rate.den && s->streams[0]->r_frame_rate.num == 1) 47 put_le32(pb, s->streams[0]->r_frame_rate.den); 48 else 49 put_le32(pb, 0xFFFFFFFF); //variable framerate 50 51 return 0; 52} 53 54static int vc1test_write_packet(AVFormatContext *s, AVPacket *pkt) 55{ 56 RCVContext *ctx = s->priv_data; 57 ByteIOContext *pb = s->pb; 58 59 if (!pkt->size) 60 return 0; 61 put_le32(pb, pkt->size | ((pkt->flags & AV_PKT_FLAG_KEY) ? 0x80000000 : 0)); 62 put_le32(pb, pkt->pts); 63 put_buffer(pb, pkt->data, pkt->size); 64 put_flush_packet(pb); 65 ctx->frames++; 66 67 return 0; 68} 69 70static int vc1test_write_trailer(AVFormatContext *s) 71{ 72 RCVContext *ctx = s->priv_data; 73 ByteIOContext *pb = s->pb; 74 75 if (!url_is_streamed(s->pb)) { 76 url_fseek(pb, 0, SEEK_SET); 77 put_le24(pb, ctx->frames); 78 put_flush_packet(pb); 79 } 80 return 0; 81} 82 83AVOutputFormat vc1t_muxer = { 84 "rcv", 85 NULL_IF_CONFIG_SMALL("VC-1 test bitstream"), 86 "", 87 "rcv", 88 sizeof(RCVContext), 89 CODEC_ID_NONE, 90 CODEC_ID_WMV3, 91 vc1test_write_header, 92 vc1test_write_packet, 93 vc1test_write_trailer, 94}; 95