libavformat/tests/seek.c

   1 /*
   2  * Copyright (c) 2003 Fabrice Bellard
   3  * Copyright (c) 2007 Michael Niedermayer
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; 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
  30 #include "libavformat/avformat.h"
  31
  32 static char buffer[20];
  33
  34 static const char *ret_str(int v)
  35 {
  36     switch (v) {
  37     case AVERROR_EOF:     return "-EOF";
  38     case AVERROR(EIO):    return "-EIO";
  39     case AVERROR(ENOMEM): return "-ENOMEM";
  40     case AVERROR(EINVAL): return "-EINVAL";
  41     default:
  42         snprintf(buffer, sizeof(buffer), "%2d", v);
  43         return buffer;
  44     }
  45 }
  46
  47 static void ts_str(char buffer[60], int64_t ts, AVRational base)
  48 {
  49     double tsval;
  50     if (ts == AV_NOPTS_VALUE) {
  51         strcpy(buffer, " NOPTS   ");
  52         return;
  53     }
  54     tsval = ts * av_q2d(base);
  55     snprintf(buffer, 60, "%9f", tsval);
  56 }
  57
  58 int main(int argc, char **argv)
  59 {
  60     const char *filename;
  61     AVFormatContext *ic = NULL;
  62     int i, ret, stream_id;
  63     int64_t timestamp;
  64     AVDictionary *format_opts = NULL;
  65
  66     av_dict_set(&format_opts, "channels", "1", 0);
  67     av_dict_set(&format_opts, "sample_rate", "22050", 0);
  68
  69     /* initialize libavcodec, and register all codecs and formats */
  70     av_register_all();
  71
  72     if (argc != 2) {
  73         printf("usage: %s input_file\n"
  74                "\n", argv[0]);
  75         return 1;
  76     }
  77
  78     filename = argv[1];
  79
  80     ret = avformat_open_input(&ic, filename, NULL, &format_opts);
  81     av_dict_free(&format_opts);
  82     if (ret < 0) {
  83         fprintf(stderr, "cannot open %s\n", filename);
  84         return 1;
  85     }
  86
  87     ret = avformat_find_stream_info(ic, NULL);
  88     if (ret < 0) {
  89         fprintf(stderr, "%s: could not find codec parameters\n", filename);
  90         return 1;
  91     }
  92
  93     for(i=0; ; i++){
  94         AVPacket pkt = { 0 };
  95         AVStream *av_uninit(st);
  96         char ts_buf[60];
  97
  98         if(ret>=0){
  99             ret= av_read_frame(ic, &pkt);
 100             if(ret>=0){
 101                 char dts_buf[60];
 102                 st= ic->streams[pkt.stream_index];
 103                 ts_str(dts_buf, pkt.dts, st->time_base);
 104                 ts_str(ts_buf,  pkt.pts, st->time_base);
 105                 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);
 106                 av_packet_unref(&pkt);
 107             } else
 108                 printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
 109             printf("\n");
 110         }
 111
 112         if(i>25) break;
 113
 114         stream_id= (i>>1)%(ic->nb_streams+1) - 1;
 115         timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
 116         if(stream_id>=0){
 117             st= ic->streams[stream_id];
 118             timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
 119         }
 120         //FIXME fully test the new seek API
 121         if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
 122         else    ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
 123         ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
 124         printf("ret:%-10s st:%2d flags:%d  ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
 125     }
 126
 127     avformat_close_input(&ic);
 128
 129     return 0;
 130 }