/*
  * 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 <string.h>
 
 #include "libavutil/common.h"
 #include "libavutil/mathematics.h"
 #include "libavformat/avformat.h"
 
 #undef printf
 #undef fprintf
 
 static char buffer[20];
 
 static const char *ret_str(int v)
 {
     switch (v) {
     case AVERROR_EOF:     return "-EOF";
     case AVERROR(EIO):    return "-EIO";
     case AVERROR(ENOMEM): return "-ENOMEM";
     case AVERROR(EINVAL): return "-EINVAL";
     default:
         snprintf(buffer, sizeof(buffer), "%2d", v);
         return buffer;
     }
 }
 
 static void ts_str(char buffer[60], int64_t ts, AVRational base)
 {
     if (ts == AV_NOPTS_VALUE) {
         strcpy(buffer, " NOPTS   ");
         return;
     }

     ts= av_rescale_q(ts, base, (AVRational){1, 1000000});

     snprintf(buffer, 60, "%c%"PRId64".%06"PRId64"", ts<0 ? '-' : ' ', FFABS(ts)/1000000, FFABS(ts)%1000000);

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

     AVDictionary *format_opts = NULL;
 
     av_dict_set(&format_opts, "channels", "1", 0);
     av_dict_set(&format_opts, "sample_rate", "22050", 0);

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

         return 1;

     }
 
     filename = argv[1];
 

     ret = avformat_open_input(&ic, filename, NULL, &format_opts);

     av_dict_free(&format_opts);

     if (ret < 0) {
         fprintf(stderr, "cannot open %s\n", filename);

         return 1;

     }
 

     ret = avformat_find_stream_info(ic, NULL);

     if (ret < 0) {
         fprintf(stderr, "%s: could not find codec parameters\n", filename);

         return 1;

     }
 
     for(i=0; ; i++){
         AVPacket pkt;
         AVStream *av_uninit(st);
         char ts_buf[60];
 
         memset(&pkt, 0, sizeof(pkt));
         if(ret>=0){
             ret= av_read_frame(ic, &pkt);
             if(ret>=0){
                 char dts_buf[60];
                 st= ic->streams[pkt.stream_index];
                 ts_str(dts_buf, pkt.dts, st->time_base);
                 ts_str(ts_buf,  pkt.pts, st->time_base);
                 printf("ret:%-10s st:%2d flags:%d dts:%s pts:%s pos:%7" PRId64 " size:%6d", ret_str(ret), pkt.stream_index, pkt.flags, dts_buf, ts_buf, pkt.pos, pkt.size);
                 av_free_packet(&pkt);
             } else
                 printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
             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);
         }
         //FIXME fully test the new seek API
         if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
         else    ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
         ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
         printf("ret:%-10s st:%2d flags:%d  ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
     }
 

     avformat_close_input(&ic);

 
     return 0;
 }