/*
  * 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)
 {
     AVCodecContext *avc = s->streams[0]->codec;

     AVIOContext *pb = s->pb;

     if (avc->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, avc->extradata, 4);
     avio_wl32(pb, avc->height);
     avio_wl32(pb, avc->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_seek(pb, 0, SEEK_SET);

         avio_wl24(pb, ctx->frames);

         avio_flush(pb);

     }
     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,

 };