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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  */
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;
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 if(!strcmp(argv[i], "-usetoc")) {
80  av_dict_set(&format_opts, "usetoc", argv[i+1], 0);
81  } else {
82  argc = 1;
83  }
84  }
85 
86  av_dict_set(&format_opts, "channels", "1", 0);
87  av_dict_set(&format_opts, "sample_rate", "22050", 0);
88 
89  /* initialize libavcodec, and register all codecs and formats */
91 
92  if (argc < 2) {
93  printf("usage: %s input_file\n"
94  "\n", argv[0]);
95  return 1;
96  }
97 
98  filename = argv[1];
99 
100  ret = avformat_open_input(&ic, filename, NULL, &format_opts);
101  av_dict_free(&format_opts);
102  if (ret < 0) {
103  fprintf(stderr, "cannot open %s\n", filename);
104  return 1;
105  }
106 
107  ret = avformat_find_stream_info(ic, NULL);
108  if (ret < 0) {
109  fprintf(stderr, "%s: could not find codec parameters\n", filename);
110  return 1;
111  }
112 
113  if(seekfirst != AV_NOPTS_VALUE){
114  if(firstback) avformat_seek_file(ic, -1, INT64_MIN, seekfirst, seekfirst, 0);
115  else avformat_seek_file(ic, -1, seekfirst, seekfirst, INT64_MAX, 0);
116  }
117  for(i=0; ; i++){
118  AVPacket pkt = { 0 };
119  AVStream *av_uninit(st);
120  char ts_buf[60];
121 
122  if(ret>=0){
123  for(j=0; j<frame_count; j++) {
124  ret= av_read_frame(ic, &pkt);
125  if(ret>=0){
126  char dts_buf[60];
127  st= ic->streams[pkt.stream_index];
128  ts_str(dts_buf, pkt.dts, st->time_base);
129  ts_str(ts_buf, pkt.pts, st->time_base);
130  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);
131  av_free_packet(&pkt);
132  } else
133  printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
134  printf("\n");
135  }
136  }
137 
138  if(i>25) break;
139 
140  stream_id= (i>>1)%(ic->nb_streams+1) - 1;
141  timestamp= (i*19362894167LL) % (duration*AV_TIME_BASE) - AV_TIME_BASE;
142  if(stream_id>=0){
143  st= ic->streams[stream_id];
144  timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
145  }
146  //FIXME fully test the new seek API
147  if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
148  else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
149  ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
150  printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
151  }
152 
154 
155  return 0;
156 }
#define NULL
Definition: coverity.c:32
float v
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:280
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1447
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:402
int size
Definition: avcodec.h:1423
static AVPacket pkt
Format I/O context.
Definition: avformat.h:1272
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1340
#define AVERROR_EOF
End of file.
Definition: error.h:55
static int64_t duration
Definition: ffplay.c:325
AVDictionary * format_opts
Definition: cmdutils.c:68
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:140
#define AVERROR(e)
Definition: error.h:43
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
static void ts_str(char buffer[60], int64_t ts, AVRational base)
Definition: seek-test.c:46
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1428
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1328
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
ret
Definition: avfilter.c:974
#define FFABS(a)
Definition: common.h:61
static char buffer[20]
Definition: seek-test.c:31
static const char * ret_str(int v)
Definition: seek-test.c:33
Stream structure.
Definition: avformat.h:842
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
int main(int argc, char **argv)
Definition: seek-test.c:56
rational number numerator/denominator
Definition: rational.h:43
#define snprintf
Definition: snprintf.h:34
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1475
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Seek to timestamp ts.
Definition: utils.c:2219
Main libavformat public API header.
common internal and external API header
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3081
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:3709
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1421
#define av_uninit(x)
Definition: attributes.h:141
int stream_index
Definition: avcodec.h:1424
This structure stores compressed data.
Definition: avcodec.h:1399
void av_register_all(void)
Initialize libavformat and register all the muxers, demuxers and protocols.
Definition: allformats.c:51
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1415
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
GLuint buffer
Definition: opengl_enc.c:102