/*
  * Copyright (c) 2003 Fabrice Bellard
  * Copyright (c) 2007 Michael Niedermayer
  *
  * 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 <stdint.h>

 #include <stdlib.h>
 #include <stdio.h>
 

 #include "libavformat/avformat.h"

 #undef exit
 

 int main(int argc, char **argv)
 {
     const char *filename;
     AVFormatContext *ic;
     int i, ret, stream_id;
     int64_t timestamp;

     AVFormatParameters params, *ap= &params;
     memset(ap, 0, sizeof(params));
     ap->channels=1;
     ap->sample_rate= 22050;

 
     /* initialize libavcodec, and register all codecs and formats */
     av_register_all();
 
     if (argc != 2) {
         printf("usage: %s input_file\n"
                "\n", argv[0]);
         exit(1);
     }
 
     filename = argv[1];
 
     /* allocate the media context */

     ic = avformat_alloc_context();

     if (!ic) {
         fprintf(stderr, "Memory error\n");
         exit(1);
     }
 

     ret = av_open_input_file(&ic, filename, NULL, 0, ap);

     if (ret < 0) {

         fprintf(stderr, "cannot open %s\n", filename);

         exit(1);
     }
 
     ret = av_find_stream_info(ic);
     if (ret < 0) {
         fprintf(stderr, "%s: could not find codec parameters\n", filename);
         exit(1);
     }
 
     for(i=0; ; i++){
         AVPacket pkt;
         AVStream *st;

 
         memset(&pkt, 0, sizeof(pkt));

         if(ret>=0){

             ret= av_read_frame(ic, &pkt);
             printf("ret:%2d", ret);
             if(ret>=0){
                 st= ic->streams[pkt.stream_index];

                 printf(" st:%2d dts:%f pts:%f pos:%" PRId64 " size:%d flags:%d", pkt.stream_index, pkt.dts*av_q2d(st->time_base), pkt.pts*av_q2d(st->time_base), pkt.pos, pkt.size, pkt.flags);

             }
             printf("\n");

         }

 
         if(i>25) break;
 
         stream_id= (i>>1)%(ic->nb_streams+1) - 1;
         timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
         if(stream_id>=0){
             st= ic->streams[stream_id];
             timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
         }
         ret = av_seek_frame(ic, stream_id, timestamp, (i&1)*AVSEEK_FLAG_BACKWARD);
         printf("ret:%2d st:%2d ts:%f flags:%d\n", ret, stream_id, timestamp*(stream_id<0 ? 1.0/AV_TIME_BASE : av_q2d(st->time_base)), i&1);
     }
 
     return 0;
 }