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  1. /*
  2.  * Copyright (c) 2003 Fabrice Bellard
  3.  * Copyright (c) 2007 Michael Niedermayer
  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.  
  22. #include <stdint.h>
  23. #include <stdlib.h>
  24. #include <stdio.h>
  25. #include <string.h>
  26.  
  27. #include "libavutil/common.h"
  28. #include "libavutil/mathematics.h"
  29. #include "libavformat/avformat.h"
  30.  
  31. static char buffer[20];
  32.  
  33. static const char *ret_str(int v)
  34. {
  35.     switch (v) {
  36.     case AVERROR_EOF:     return "-EOF";
  37.     case AVERROR(EIO):    return "-EIO";
  38.     case AVERROR(ENOMEM): return "-ENOMEM";
  39.     case AVERROR(EINVAL): return "-EINVAL";
  40.     default:
  41.         snprintf(buffer, sizeof(buffer), "%2d", v);
  42.         return buffer;
  43.     }
  44. }
  45.  
  46. static void ts_str(char buffer[60], int64_t ts, AVRational base)
  47. {
  48.     if (ts == AV_NOPTS_VALUE) {
  49.         strcpy(buffer, " NOPTS   ");
  50.         return;
  51.     }
  52.     ts= av_rescale_q(ts, base, (AVRational){1, 1000000});
  53.     snprintf(buffer, 60, "%c%"PRId64".%06"PRId64"", ts<0 ? '-' : ' ', FFABS(ts)/1000000, FFABS(ts)%1000000);
  54. }
  55.  
  56. int main(int argc, char **argv)
  57. {
  58.     const char *filename;
  59.     AVFormatContext *ic = NULL;
  60.     int i, ret, stream_id;
  61.     int j;
  62.     int64_t timestamp;
  63.     AVDictionary *format_opts = NULL;
  64.     int64_t seekfirst = AV_NOPTS_VALUE;
  65.     int firstback=0;
  66.     int frame_count = 1;
  67.     int duration = 4;
  68.  
  69.     for(i=2; i<argc; i+=2){
  70.         if       (!strcmp(argv[i], "-seekforw")){
  71.             seekfirst = atoi(argv[i+1]);
  72.         } else if(!strcmp(argv[i], "-seekback")){
  73.             seekfirst = atoi(argv[i+1]);
  74.             firstback = 1;
  75.         } else if(!strcmp(argv[i], "-frames")){
  76.             frame_count = atoi(argv[i+1]);
  77.         } else if(!strcmp(argv[i], "-duration")){
  78.             duration = atoi(argv[i+1]);
  79.         } else {
  80.             argc = 1;
  81.         }
  82.     }
  83.  
  84.     av_dict_set(&format_opts, "channels", "1", 0);
  85.     av_dict_set(&format_opts, "sample_rate", "22050", 0);
  86.  
  87.     /* initialize libavcodec, and register all codecs and formats */
  88.     av_register_all();
  89.  
  90.     if (argc < 2) {
  91.         printf("usage: %s input_file\n"
  92.                "\n", argv[0]);
  93.         return 1;
  94.     }
  95.  
  96.     filename = argv[1];
  97.  
  98.     ret = avformat_open_input(&ic, filename, NULL, &format_opts);
  99.     av_dict_free(&format_opts);
  100.     if (ret < 0) {
  101.         fprintf(stderr, "cannot open %s\n", filename);
  102.         return 1;
  103.     }
  104.  
  105.     ret = avformat_find_stream_info(ic, NULL);
  106.     if (ret < 0) {
  107.         fprintf(stderr, "%s: could not find codec parameters\n", filename);
  108.         return 1;
  109.     }
  110.  
  111.     if(seekfirst != AV_NOPTS_VALUE){
  112.         if(firstback)   avformat_seek_file(ic, -1, INT64_MIN, seekfirst, seekfirst, 0);
  113.         else            avformat_seek_file(ic, -1, seekfirst, seekfirst, INT64_MAX, 0);
  114.     }
  115.     for(i=0; ; i++){
  116.         AVPacket pkt = { 0 };
  117.         AVStream *av_uninit(st);
  118.         char ts_buf[60];
  119.  
  120.         if(ret>=0){
  121.             for(j=0; j<frame_count; j++) {
  122.             ret= av_read_frame(ic, &pkt);
  123.             if(ret>=0){
  124.                 char dts_buf[60];
  125.                 st= ic->streams[pkt.stream_index];
  126.                 ts_str(dts_buf, pkt.dts, st->time_base);
  127.                 ts_str(ts_buf,  pkt.pts, st->time_base);
  128.                 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);
  129.                 av_free_packet(&pkt);
  130.             } else
  131.                 printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
  132.             printf("\n");
  133.             }
  134.         }
  135.  
  136.         if(i>25) break;
  137.  
  138.         stream_id= (i>>1)%(ic->nb_streams+1) - 1;
  139.         timestamp= (i*19362894167LL) % (duration*AV_TIME_BASE) - AV_TIME_BASE;
  140.         if(stream_id>=0){
  141.             st= ic->streams[stream_id];
  142.             timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
  143.         }
  144.         //FIXME fully test the new seek API
  145.         if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
  146.         else    ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
  147.         ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
  148.         printf("ret:%-10s st:%2d flags:%d  ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
  149.     }
  150.  
  151.     avformat_close_input(&ic);
  152.  
  153.     return 0;
  154. }
  155.