2 * Copyright (c) 2003 Fabrice Bellard
3 * Copyright (c) 2007 Michael Niedermayer
5 * This file is part of FFmpeg.
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.
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.
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
27 #include "libavutil/common.h"
28 #include "libavutil/mathematics.h"
29 #include "libavformat/avformat.h"
31 static char buffer
[20];
33 static const char *ret_str(int 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";
41 snprintf(buffer
, sizeof(buffer
), "%2d", v
);
46 static void ts_str(char buffer
[60], int64_t ts
, AVRational base
)
48 if (ts
== AV_NOPTS_VALUE
) {
49 strcpy(buffer
, " NOPTS ");
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);
56 int main(int argc
, char **argv
)
59 AVFormatContext
*ic
= NULL
;
60 int i
, ret
, stream_id
;
63 AVDictionary
*format_opts
= NULL
;
64 int64_t seekfirst
= AV_NOPTS_VALUE
;
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]);
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]);
84 av_dict_set(&format_opts
, "channels", "1", 0);
85 av_dict_set(&format_opts
, "sample_rate", "22050", 0);
87 /* initialize libavcodec, and register all codecs and formats */
91 printf("usage: %s input_file\n"
98 ret
= avformat_open_input(&ic
, filename
, NULL
, &format_opts
);
99 av_dict_free(&format_opts
);
101 fprintf(stderr
, "cannot open %s\n", filename
);
105 ret
= avformat_find_stream_info(ic
, NULL
);
107 fprintf(stderr
, "%s: could not find codec parameters\n", filename
);
111 if(seekfirst
!= AV_NOPTS_VALUE
){
112 if(firstback
) avformat_seek_file(ic
, -1, INT64_MIN
, seekfirst
, seekfirst
, 0);
113 else avformat_seek_file(ic
, -1, seekfirst
, seekfirst
, INT64_MAX
, 0);
116 AVPacket pkt
= { 0 };
117 AVStream
*av_uninit(st
);
121 for(j
=0; j
<frame_count
; j
++) {
122 ret
= av_read_frame(ic
, &pkt
);
125 st
= ic
->streams
[pkt
.stream_index
];
126 ts_str(dts_buf
, pkt
.dts
, st
->time_base
);
127 ts_str(ts_buf
, pkt
.pts
, st
->time_base
);
128 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
);
129 av_free_packet(&pkt
);
131 printf("ret:%s", ret_str(ret
)); // necessary to avoid trailing whitespace
138 stream_id
= (i
>>1)%(ic
->nb_streams
+1) - 1;
139 timestamp
= (i
*19362894167LL) % (duration
*AV_TIME_BASE
) - AV_TIME_BASE
;
141 st
= ic
->streams
[stream_id
];
142 timestamp
= av_rescale_q(timestamp
, AV_TIME_BASE_Q
, st
->time_base
);
144 //FIXME fully test the new seek API
145 if(i
&1) ret
= avformat_seek_file(ic
, stream_id
, INT64_MIN
, timestamp
, timestamp
, 0);
146 else ret
= avformat_seek_file(ic
, stream_id
, timestamp
, timestamp
, INT64_MAX
, 0);
147 ts_str(ts_buf
, timestamp
, stream_id
< 0 ? AV_TIME_BASE_Q
: st
->time_base
);
148 printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret
), stream_id
, i
&1, ts_buf
);
151 avformat_close_input(&ic
);