Libav 0.7.1
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00001 /* 00002 * Copyright (c) 2003 Fabrice Bellard 00003 * Copyright (c) 2007 Michael Niedermayer 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #include <stdint.h> 00023 #include <stdlib.h> 00024 #include <stdio.h> 00025 #include <string.h> 00026 00027 #include "libavutil/common.h" 00028 #include "libavformat/avformat.h" 00029 00030 #undef exit 00031 #undef printf 00032 #undef fprintf 00033 00034 static char buffer[20]; 00035 00036 static const char *ret_str(int v) 00037 { 00038 switch (v) { 00039 case AVERROR_EOF: return "-EOF"; 00040 case AVERROR(EIO): return "-EIO"; 00041 case AVERROR(ENOMEM): return "-ENOMEM"; 00042 case AVERROR(EINVAL): return "-EINVAL"; 00043 default: 00044 snprintf(buffer, sizeof(buffer), "%2d", v); 00045 return buffer; 00046 } 00047 } 00048 00049 static void ts_str(char buffer[60], int64_t ts, AVRational base) 00050 { 00051 double tsval; 00052 if (ts == AV_NOPTS_VALUE) { 00053 strcpy(buffer, " NOPTS "); 00054 return; 00055 } 00056 tsval = ts * av_q2d(base); 00057 snprintf(buffer, 60, "%9f", tsval); 00058 } 00059 00060 int main(int argc, char **argv) 00061 { 00062 const char *filename; 00063 AVFormatContext *ic = NULL; 00064 int i, ret, stream_id; 00065 int64_t timestamp; 00066 AVFormatParameters params, *ap= ¶ms; 00067 memset(ap, 0, sizeof(params)); 00068 ap->channels=1; 00069 ap->sample_rate= 22050; 00070 00071 /* initialize libavcodec, and register all codecs and formats */ 00072 av_register_all(); 00073 00074 if (argc != 2) { 00075 printf("usage: %s input_file\n" 00076 "\n", argv[0]); 00077 exit(1); 00078 } 00079 00080 filename = argv[1]; 00081 00082 ret = av_open_input_file(&ic, filename, NULL, 0, ap); 00083 if (ret < 0) { 00084 fprintf(stderr, "cannot open %s\n", filename); 00085 exit(1); 00086 } 00087 00088 ret = av_find_stream_info(ic); 00089 if (ret < 0) { 00090 fprintf(stderr, "%s: could not find codec parameters\n", filename); 00091 exit(1); 00092 } 00093 00094 for(i=0; ; i++){ 00095 AVPacket pkt; 00096 AVStream *av_uninit(st); 00097 char ts_buf[60]; 00098 00099 memset(&pkt, 0, sizeof(pkt)); 00100 if(ret>=0){ 00101 ret= av_read_frame(ic, &pkt); 00102 if(ret>=0){ 00103 char dts_buf[60]; 00104 st= ic->streams[pkt.stream_index]; 00105 ts_str(dts_buf, pkt.dts, st->time_base); 00106 ts_str(ts_buf, pkt.pts, st->time_base); 00107 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); 00108 av_free_packet(&pkt); 00109 } else 00110 printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace 00111 printf("\n"); 00112 } 00113 00114 if(i>25) break; 00115 00116 stream_id= (i>>1)%(ic->nb_streams+1) - 1; 00117 timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE; 00118 if(stream_id>=0){ 00119 st= ic->streams[stream_id]; 00120 timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base); 00121 } 00122 //FIXME fully test the new seek API 00123 if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0); 00124 else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0); 00125 ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base); 00126 printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf); 00127 } 00128 00129 av_close_input_file(ic); 00130 00131 return 0; 00132 }