seek-test.c
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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 #include "libavformat/avformat.h"
30 
31 #undef printf
32 #undef fprintf
33 
34 static char buffer[20];
35 
36 static const char *ret_str(int v)
37 {
38  switch (v) {
39  case AVERROR_EOF: return "-EOF";
40  case AVERROR(EIO): return "-EIO";
41  case AVERROR(ENOMEM): return "-ENOMEM";
42  case AVERROR(EINVAL): return "-EINVAL";
43  default:
44  snprintf(buffer, sizeof(buffer), "%2d", v);
45  return buffer;
46  }
47 }
48 
49 static void ts_str(char buffer[60], int64_t ts, AVRational base)
50 {
51  double tsval;
52  if (ts == AV_NOPTS_VALUE) {
53  strcpy(buffer, " NOPTS ");
54  return;
55  }
56  tsval = ts * av_q2d(base);
57  snprintf(buffer, 60, "%9f", tsval);
58 }
59 
60 int main(int argc, char **argv)
61 {
62  const char *filename;
63  AVFormatContext *ic = NULL;
64  int i, ret, stream_id;
65  int64_t timestamp;
67 
68  av_dict_set(&format_opts, "channels", "1", 0);
69  av_dict_set(&format_opts, "sample_rate", "22050", 0);
70 
71  /* initialize libavcodec, and register all codecs and formats */
73 
74  if (argc != 2) {
75  printf("usage: %s input_file\n"
76  "\n", argv[0]);
77  return 1;
78  }
79 
80  filename = argv[1];
81 
82  ret = avformat_open_input(&ic, filename, NULL, &format_opts);
83  av_dict_free(&format_opts);
84  if (ret < 0) {
85  fprintf(stderr, "cannot open %s\n", filename);
86  return 1;
87  }
88 
90  if (ret < 0) {
91  fprintf(stderr, "%s: could not find codec parameters\n", filename);
92  return 1;
93  }
94 
95  for(i=0; ; i++){
96  AVPacket pkt;
97  AVStream *av_uninit(st);
98  char ts_buf[60];
99 
100  memset(&pkt, 0, sizeof(pkt));
101  if(ret>=0){
102  ret= av_read_frame(ic, &pkt);
103  if(ret>=0){
104  char dts_buf[60];
105  st= ic->streams[pkt.stream_index];
106  ts_str(dts_buf, pkt.dts, st->time_base);
107  ts_str(ts_buf, pkt.pts, st->time_base);
108  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);
109  av_free_packet(&pkt);
110  } else
111  printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
112  printf("\n");
113  }
114 
115  if(i>25) break;
116 
117  stream_id= (i>>1)%(ic->nb_streams+1) - 1;
118  timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
119  if(stream_id>=0){
120  st= ic->streams[stream_id];
121  timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
122  }
123  //FIXME fully test the new seek API
124  if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
125  else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
126  ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
127  printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
128  }
129 
131 
132  return 0;
133 }