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
30 #include "libavformat/avformat.h"
31
32 static char buffer[20];
33
ret_str(int v)34 static const char *ret_str(int v)
35 {
36 switch (v) {
37 case AVERROR_EOF: return "-EOF";
38 case AVERROR(EIO): return "-EIO";
39 case AVERROR(ENOMEM): return "-ENOMEM";
40 case AVERROR(EINVAL): return "-EINVAL";
41 default:
42 snprintf(buffer, sizeof(buffer), "%2d", v);
43 return buffer;
44 }
45 }
46
ts_str(char buffer[60],int64_t ts,AVRational base)47 static void ts_str(char buffer[60], int64_t ts, AVRational base)
48 {
49 if (ts == AV_NOPTS_VALUE) {
50 strcpy(buffer, " NOPTS ");
51 return;
52 }
53 ts= av_rescale_q(ts, base, (AVRational){1, 1000000});
54 snprintf(buffer, 60, "%c%"PRId64".%06"PRId64"", ts<0 ? '-' : ' ', FFABS(ts)/1000000, FFABS(ts)%1000000);
55 }
56
main(int argc,char ** argv)57 int main(int argc, char **argv)
58 {
59 const char *filename;
60 AVFormatContext *ic = avformat_alloc_context();
61 int i, ret, stream_id;
62 int j;
63 int64_t timestamp;
64 AVDictionary *format_opts = NULL;
65 int64_t seekfirst = AV_NOPTS_VALUE;
66 int firstback=0;
67 int frame_count = 1;
68 int duration = 4;
69
70 for(i=2; i<argc; i+=2){
71 if (!strcmp(argv[i], "-seekforw")){
72 seekfirst = atoi(argv[i+1]);
73 } else if(!strcmp(argv[i], "-seekback")){
74 seekfirst = atoi(argv[i+1]);
75 firstback = 1;
76 } else if(!strcmp(argv[i], "-frames")){
77 frame_count = atoi(argv[i+1]);
78 } else if(!strcmp(argv[i], "-duration")){
79 duration = atoi(argv[i+1]);
80 } else if(!strcmp(argv[i], "-fastseek")) {
81 if (atoi(argv[i+1])) {
82 ic->flags |= AVFMT_FLAG_FAST_SEEK;
83 }
84 } else if(argv[i][0] == '-' && argv[i+1]) {
85 av_dict_set(&format_opts, argv[i] + 1, argv[i+1], 0);
86 } else {
87 argc = 1;
88 }
89 }
90
91 av_dict_set(&format_opts, "channels", "1", 0);
92 av_dict_set(&format_opts, "sample_rate", "22050", 0);
93
94 if (argc < 2) {
95 printf("usage: %s input_file\n"
96 "\n", argv[0]);
97 return 1;
98 }
99
100 filename = argv[1];
101
102 ret = avformat_open_input(&ic, filename, NULL, &format_opts);
103 av_dict_free(&format_opts);
104 if (ret < 0) {
105 fprintf(stderr, "cannot open %s\n", filename);
106 return 1;
107 }
108
109 ret = avformat_find_stream_info(ic, NULL);
110 if (ret < 0) {
111 fprintf(stderr, "%s: could not find codec parameters\n", filename);
112 return 1;
113 }
114
115 if(seekfirst != AV_NOPTS_VALUE){
116 if(firstback) avformat_seek_file(ic, -1, INT64_MIN, seekfirst, seekfirst, 0);
117 else avformat_seek_file(ic, -1, seekfirst, seekfirst, INT64_MAX, 0);
118 }
119 for(i=0; ; i++){
120 AVPacket pkt = { 0 };
121 AVStream *av_uninit(st);
122 char ts_buf[60];
123
124 if(ret>=0){
125 for(j=0; j<frame_count; j++) {
126 ret= av_read_frame(ic, &pkt);
127 if(ret>=0){
128 char dts_buf[60];
129 st= ic->streams[pkt.stream_index];
130 ts_str(dts_buf, pkt.dts, st->time_base);
131 ts_str(ts_buf, pkt.pts, st->time_base);
132 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);
133 av_packet_unref(&pkt);
134 } else
135 printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
136 printf("\n");
137 }
138 }
139
140 if(i>25) break;
141
142 stream_id= (i>>1)%(ic->nb_streams+1) - 1;
143 timestamp= (i*19362894167LL) % (duration*AV_TIME_BASE) - AV_TIME_BASE;
144 if(stream_id>=0){
145 st= ic->streams[stream_id];
146 timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
147 }
148 //FIXME fully test the new seek API
149 if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
150 else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
151 ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
152 printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
153 }
154
155 avformat_close_input(&ic);
156
157 return 0;
158 }
159