ref: bb8cb7a3de5aedafea43bfc8160e4099f4c48680
dir: /examples/opusfile_example.c/
/********************************************************************
* *
* THIS FILE IS PART OF THE libopusfile SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2012 *
* by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
* *
********************************************************************/
/*For fileno()*/
#if !defined(_POSIX_SOURCE)
# define _POSIX_SOURCE 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#if defined(_WIN32)
/*We need the following two to set stdin/stdout to binary.*/
# include <io.h>
# include <fcntl.h>
#endif
#include <opusfile.h>
#if defined(OP_FIXED_POINT)
typedef opus_int16 op_sample;
# define op_read_native_stereo op_read_stereo
#else
typedef float op_sample;
# define op_read_native_stereo op_read_float_stereo
#endif
static void print_duration(FILE *_fp,ogg_int64_t _nsamples,int _frac){
ogg_int64_t seconds;
ogg_int64_t minutes;
ogg_int64_t hours;
ogg_int64_t days;
ogg_int64_t weeks;
_nsamples+=_frac?24:24000;
seconds=_nsamples/48000;
_nsamples-=seconds*48000;
minutes=seconds/60;
seconds-=minutes*60;
hours=minutes/60;
minutes-=hours*60;
days=hours/24;
hours-=days*24;
weeks=days/7;
days-=weeks*7;
if(weeks)fprintf(_fp,"%liw",(long)weeks);
if(weeks||days)fprintf(_fp,"%id",(int)days);
if(weeks||days||hours){
if(weeks||days)fprintf(_fp,"%02ih",(int)hours);
else fprintf(_fp,"%ih",(int)hours);
}
if(weeks||days||hours||minutes){
if(weeks||days||hours)fprintf(_fp,"%02im",(int)minutes);
else fprintf(_fp,"%im",(int)minutes);
fprintf(_fp,"%02i",(int)seconds);
}
else fprintf(_fp,"%i",(int)seconds);
if(_frac)fprintf(_fp,".%03i",(int)(_nsamples/48));
fprintf(_fp,"s");
}
static void print_size(FILE *_fp,opus_int64 _nbytes,int _metric,
const char *_spacer){
static const char SUFFIXES[7]={' ','k','M','G','T','P','E'};
opus_int64 val;
opus_int64 den;
opus_int64 round;
int base;
int shift;
base=_metric?1000:1024;
round=0;
den=1;
for(shift=0;shift<6;shift++){
if(_nbytes<den*base-round)break;
den*=base;
round=den>>1;
}
val=(_nbytes+round)/den;
if(den>1&&val<10){
if(den>=1000000000)val=(_nbytes+(round/100))/(den/100);
else val=(_nbytes*100+round)/den;
fprintf(_fp,"%li.%02i%s%c",(long)(val/100),(int)(val%100),
_spacer,SUFFIXES[shift]);
}
else if(den>1&&val<100){
if(den>=1000000000)val=(_nbytes+(round/10))/(den/10);
else val=(_nbytes*10+round)/den;
fprintf(_fp,"%li.%i%s%c",(long)(val/10),(int)(val%10),
_spacer,SUFFIXES[shift]);
}
else fprintf(_fp,"%li%s%c",(long)val,_spacer,SUFFIXES[shift]);
}
int main(int _argc,const char **_argv){
OggOpusFile *of;
ogg_int64_t pcm_offset;
ogg_int64_t pcm_print_offset;
ogg_int64_t nsamples;
opus_int32 bitrate;
int ret;
int prev_li;
#if defined(_WIN32)
# undef fileno
# define fileno _fileno
/*We need to set stdin/stdout to binary mode. Damn windows.*/
/*Beware the evil ifdef. We avoid these where we can, but this one we
cannot.
Don't add any more.
You'll probably go to hell if you do.*/
_setmode(fileno(stdin),_O_BINARY);
_setmode(fileno(stdout),_O_BINARY);
#endif
if(_argc!=2){
fprintf(stderr,"Usage: %s <file.opus>\n",_argv[0]);
return EXIT_FAILURE;
}
if(strcmp(_argv[1],"-")==0){
OpusFileCallbacks cb={NULL,NULL,NULL,NULL};
of=op_open_callbacks(op_fdopen(&cb,fileno(stdin),"rb"),&cb,NULL,0,&ret);
}
else{
/*Try to treat the argument as a URL.*/
of=op_open_url(_argv[1],OP_SSL_SKIP_CERTIFICATE_CHECK,&ret);
#if 0
if(of==NULL){
OpusFileCallbacks cb={NULL,NULL,NULL,NULL};
void *fp;
/*For debugging: force a file to not be seekable.*/
fp=op_fopen(&cb,_argv[1],"rb");
cb.seek=NULL;
cb.tell=NULL;
of=op_open_callbacks(fp,&cb,NULL,0,NULL);
}
#else
if(of==NULL)of=op_open_file(_argv[1],&ret);
#endif
}
if(of==NULL){
fprintf(stderr,"Failed to open file '%s': %i\n",_argv[1],ret);
return EXIT_FAILURE;
}
if(op_seekable(of)){
ogg_int64_t duration;
opus_int64 size;
fprintf(stderr,"Total number of links: %i\n",op_link_count(of));
duration=op_pcm_total(of,-1);
fprintf(stderr,"Total duration: ");
print_duration(stderr,duration,3);
fprintf(stderr," (%li samples @ 48 kHz)\n",(long)duration);
size=op_raw_total(of,-1);
fprintf(stderr,"Total size: ");
print_size(stderr,size,0,"");
fprintf(stderr,"\n");
}
prev_li=-1;
nsamples=0;
pcm_offset=op_pcm_tell(of);
if(pcm_offset!=0){
fprintf(stderr,"Non-zero starting PCM offset: %li\n",(long)pcm_offset);
}
pcm_print_offset=pcm_offset-48000;
bitrate=0;
for(;;){
ogg_int64_t next_pcm_offset;
op_sample pcm[120*48*2];
int li;
ret=op_read_native_stereo(of,pcm,sizeof(pcm)/sizeof(*pcm));
if(ret<0){
fprintf(stderr,"\nError decoding '%s': %i\n",_argv[1],ret);
ret=EXIT_FAILURE;
break;
}
li=op_current_link(of);
if(li!=prev_li){
const OpusHead *head;
const OpusTags *tags;
int ci;
/*We found a new link.
Print out some information.*/
fprintf(stderr,"Decoding link %i: \n",li);
head=op_head(of,li);
fprintf(stderr," Channels: %i\n",head->channel_count);
if(op_seekable(of)){
ogg_int64_t duration;
opus_int64 size;
duration=op_pcm_total(of,li);
fprintf(stderr," Duration: ");
print_duration(stderr,duration,3);
fprintf(stderr," (%li samples @ 48 kHz)\n",(long)duration);
size=op_raw_total(of,li);
fprintf(stderr," Size: ");
print_size(stderr,size,0,"");
fprintf(stderr,"\n");
}
if(head->input_sample_rate){
fprintf(stderr," Original sampling rate: %lu Hz\n",
(unsigned long)head->input_sample_rate);
}
tags=op_tags(of,li);
fprintf(stderr," Encoded by: %s\n",tags->vendor);
for(ci=0;ci<tags->comments;ci++){
fprintf(stderr," %s\n",tags->user_comments[ci]);
}
fprintf(stderr,"\n");
if(!op_seekable(of)){
pcm_offset=op_pcm_tell(of)-ret;
if(pcm_offset!=0){
fprintf(stderr,"Non-zero starting PCM offset in link %i: %li\n",
li,(long)pcm_offset);
}
}
}
if(li!=prev_li||pcm_offset>=pcm_print_offset+48000){
opus_int32 next_bitrate;
opus_int64 raw_offset;
next_bitrate=op_bitrate_instant(of);
if(next_bitrate>=0)bitrate=next_bitrate;
raw_offset=op_raw_tell(of);
fprintf(stderr,"\r ");
print_size(stderr,raw_offset,0,"");
fprintf(stderr," ");
print_duration(stderr,pcm_offset,0);
fprintf(stderr," (");
print_size(stderr,bitrate,1," ");
fprintf(stderr,"bps) \r");
pcm_print_offset=pcm_offset;
}
next_pcm_offset=op_pcm_tell(of);
if(pcm_offset+ret!=next_pcm_offset){
fprintf(stderr,"\nPCM offset gap! %li+%i!=%li\n",
(long)pcm_offset,ret,(long)next_pcm_offset);
}
pcm_offset=next_pcm_offset;
if(ret<=0){
ret=EXIT_SUCCESS;
break;
}
if(!fwrite(pcm,sizeof(*pcm)*2,ret,stdout)){
fprintf(stderr,"\nError writing decoded audio data: %s\n",
strerror(errno));
ret=EXIT_FAILURE;
break;
}
nsamples+=ret;
prev_li=li;
}
op_free(of);
if(ret==EXIT_SUCCESS){
fprintf(stderr,"\nDone: played ");
print_duration(stderr,nsamples,3);
fprintf(stderr," (%li samples @ 48 kHz).\n",(long)nsamples);
}
return ret;
}