add avformat_seek_file()
[libav.git] / tests / 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 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 */
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21
22#include <stdint.h>
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23#include <stdlib.h>
24#include <stdio.h>
25
245976da 26#include "libavformat/avformat.h"
f97b7e66 27
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28#undef exit
29
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30int main(int argc, char **argv)
31{
32 const char *filename;
33 AVFormatContext *ic;
34 int i, ret, stream_id;
35 int64_t timestamp;
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36 AVFormatParameters params, *ap= &params;
37 memset(ap, 0, sizeof(params));
38 ap->channels=1;
39 ap->sample_rate= 22050;
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40
41 /* initialize libavcodec, and register all codecs and formats */
42 av_register_all();
43
44 if (argc != 2) {
45 printf("usage: %s input_file\n"
46 "\n", argv[0]);
47 exit(1);
48 }
49
50 filename = argv[1];
51
52 /* allocate the media context */
8e2fd8e1 53 ic = avformat_alloc_context();
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54 if (!ic) {
55 fprintf(stderr, "Memory error\n");
56 exit(1);
57 }
58
aba29e6f 59 ret = av_open_input_file(&ic, filename, NULL, 0, ap);
f97b7e66 60 if (ret < 0) {
755bfeab 61 fprintf(stderr, "cannot open %s\n", filename);
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62 exit(1);
63 }
64
65 ret = av_find_stream_info(ic);
66 if (ret < 0) {
67 fprintf(stderr, "%s: could not find codec parameters\n", filename);
68 exit(1);
69 }
70
71 for(i=0; ; i++){
72 AVPacket pkt;
73 AVStream *st;
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74
75 memset(&pkt, 0, sizeof(pkt));
b929eb50 76 if(ret>=0){
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77 ret= av_read_frame(ic, &pkt);
78 printf("ret:%2d", ret);
79 if(ret>=0){
80 st= ic->streams[pkt.stream_index];
99e8b22d 81 printf(" st:%2d dts:%f pts:%f pos:%" PRId64 " size:%d flags:%d", pkt.stream_index, pkt.dts*av_q2d(st->time_base), pkt.pts*av_q2d(st->time_base), pkt.pos, pkt.size, pkt.flags);
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82 }
83 printf("\n");
b929eb50 84 }
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85
86 if(i>25) break;
87
88 stream_id= (i>>1)%(ic->nb_streams+1) - 1;
89 timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
90 if(stream_id>=0){
91 st= ic->streams[stream_id];
92 timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
93 }
94 ret = av_seek_frame(ic, stream_id, timestamp, (i&1)*AVSEEK_FLAG_BACKWARD);
95 printf("ret:%2d st:%2d ts:%f flags:%d\n", ret, stream_id, timestamp*(stream_id<0 ? 1.0/AV_TIME_BASE : av_q2d(st->time_base)), i&1);
96 }
97
98 return 0;
99}