1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/*
* Copyright (c) 2003 Fabrice Bellard
* Copyright (c) 2007 Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "libavutil/common.h"
#include "libavutil/mathematics.h"
#include "libavformat/avformat.h"
static char buffer[20];
static const char *ret_str(int v)
{
switch (v) {
case AVERROR_EOF: return "-EOF";
case AVERROR(EIO): return "-EIO";
case AVERROR(ENOMEM): return "-ENOMEM";
case AVERROR(EINVAL): return "-EINVAL";
default:
snprintf(buffer, sizeof(buffer), "%2d", v);
return buffer;
}
}
static void ts_str(char buffer[60], int64_t ts, AVRational base)
{
if (ts == AV_NOPTS_VALUE) {
strcpy(buffer, " NOPTS ");
return;
}
ts= av_rescale_q(ts, base, (AVRational){1, 1000000});
snprintf(buffer, 60, "%c%"PRId64".%06"PRId64"", ts<0 ? '-' : ' ', FFABS(ts)/1000000, FFABS(ts)%1000000);
}
int main(int argc, char **argv)
{
const char *filename;
AVFormatContext *ic = avformat_alloc_context();
int i, ret, stream_id;
int j;
int64_t timestamp;
AVDictionary *format_opts = NULL;
int64_t seekfirst = AV_NOPTS_VALUE;
int firstback=0;
int frame_count = 1;
int duration = 4;
for(i=2; i<argc; i+=2){
if (!strcmp(argv[i], "-seekforw")){
seekfirst = atoi(argv[i+1]);
} else if(!strcmp(argv[i], "-seekback")){
seekfirst = atoi(argv[i+1]);
firstback = 1;
} else if(!strcmp(argv[i], "-frames")){
frame_count = atoi(argv[i+1]);
} else if(!strcmp(argv[i], "-duration")){
duration = atoi(argv[i+1]);
} else if(!strcmp(argv[i], "-fastseek")) {
if (atoi(argv[i+1])) {
ic->flags |= AVFMT_FLAG_FAST_SEEK;
}
} else {
argc = 1;
}
}
av_dict_set(&format_opts, "channels", "1", 0);
av_dict_set(&format_opts, "sample_rate", "22050", 0);
/* initialize libavcodec, and register all codecs and formats */
av_register_all();
if (argc < 2) {
printf("usage: %s input_file\n"
"\n", argv[0]);
return 1;
}
filename = argv[1];
ret = avformat_open_input(&ic, filename, NULL, &format_opts);
av_dict_free(&format_opts);
if (ret < 0) {
fprintf(stderr, "cannot open %s\n", filename);
return 1;
}
ret = avformat_find_stream_info(ic, NULL);
if (ret < 0) {
fprintf(stderr, "%s: could not find codec parameters\n", filename);
return 1;
}
if(seekfirst != AV_NOPTS_VALUE){
if(firstback) avformat_seek_file(ic, -1, INT64_MIN, seekfirst, seekfirst, 0);
else avformat_seek_file(ic, -1, seekfirst, seekfirst, INT64_MAX, 0);
}
for(i=0; ; i++){
AVPacket pkt = { 0 };
AVStream *av_uninit(st);
char ts_buf[60];
if(ret>=0){
for(j=0; j<frame_count; j++) {
ret= av_read_frame(ic, &pkt);
if(ret>=0){
char dts_buf[60];
st= ic->streams[pkt.stream_index];
ts_str(dts_buf, pkt.dts, st->time_base);
ts_str(ts_buf, pkt.pts, st->time_base);
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);
av_packet_unref(&pkt);
} else
printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
printf("\n");
}
}
if(i>25) break;
stream_id= (i>>1)%(ic->nb_streams+1) - 1;
timestamp= (i*19362894167LL) % (duration*AV_TIME_BASE) - AV_TIME_BASE;
if(stream_id>=0){
st= ic->streams[stream_id];
timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
}
//FIXME fully test the new seek API
if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
}
avformat_close_input(&ic);
return 0;
}
|
