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/*
* 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 = NULL;
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;
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 {
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_free_packet(&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) % (4*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;
}
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