tests/seek_test.c

   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
  26 #include "libavutil/common.h"
  27 #include "libavformat/avformat.h"
  28
  29 #undef exit
  30 #undef printf
  31 #undef fprintf
  32
  33 static char buffer[20];
  34
  35 static const char *ret_str(int v)
  36 {
  37     switch (v) {
  38     case AVERROR_EOF:     return "-EOF";
  39     case AVERROR(EIO):    return "-EIO";
  40     case AVERROR(ENOMEM): return "-ENOMEM";
  41     case AVERROR(EINVAL): return "-EINVAL";
  42     default:
  43         snprintf(buffer, sizeof(buffer), "%2d", v);
  44         return buffer;
  45     }
  46 }
  47
  48 int main(int argc, char **argv)
  49 {
  50     const char *filename;
  51     AVFormatContext *ic;
  52     int i, ret, stream_id;
  53     int64_t timestamp;
  54     AVFormatParameters params, *ap= &params;
  55     memset(ap, 0, sizeof(params));
  56     ap->channels=1;
  57     ap->sample_rate= 22050;
  58
  59     /* initialize libavcodec, and register all codecs and formats */
  60     av_register_all();
  61
  62     if (argc != 2) {
  63         printf("usage: %s input_file\n"
  64                "\n", argv[0]);
  65         exit(1);
  66     }
  67
  68     filename = argv[1];
  69
  70     /* allocate the media context */
  71     ic = avformat_alloc_context();
  72     if (!ic) {
  73         fprintf(stderr, "Memory error\n");
  74         exit(1);
  75     }
  76
  77     ret = av_open_input_file(&ic, filename, NULL, 0, ap);
  78     if (ret < 0) {
  79         fprintf(stderr, "cannot open %s\n", filename);
  80         exit(1);
  81     }
  82
  83     ret = av_find_stream_info(ic);
  84     if (ret < 0) {
  85         fprintf(stderr, "%s: could not find codec parameters\n", filename);
  86         exit(1);
  87     }
  88
  89     for(i=0; ; i++){
  90         AVPacket pkt;
  91         AVStream *av_uninit(st);
  92
  93         memset(&pkt, 0, sizeof(pkt));
  94         if(ret>=0){
  95             ret= av_read_frame(ic, &pkt);
  96             if(ret>=0){
  97                 st= ic->streams[pkt.stream_index];
  98                 printf("ret:%-10s st:%2d flags:%d dts:%9f pts:%9f pos:%7" PRId64 " size:%6d", ret_str(ret), pkt.stream_index, pkt.flags, pkt.dts*av_q2d(st->time_base), pkt.pts*av_q2d(st->time_base), pkt.pos, pkt.size);
  99             } else
 100                 printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
 101             printf("\n");
 102         }
 103
 104         if(i>25) break;
 105
 106         stream_id= (i>>1)%(ic->nb_streams+1) - 1;
 107         timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
 108         if(stream_id>=0){
 109             st= ic->streams[stream_id];
 110             timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
 111         }
 112         //FIXME fully test the new seek API
 113         if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
 114         else    ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
 115         printf("ret:%-10s st:%2d flags:%d  ts:%9f\n", ret_str(ret), stream_id, i&1, timestamp*(stream_id<0 ? 1.0/AV_TIME_BASE : av_q2d(st->time_base)));
 116     }
 117
 118     return 0;
 119 }