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Diffstat (limited to 'lib/opusfile/examples/opusfile_example.c')
-rw-r--r--lib/opusfile/examples/opusfile_example.c390
1 files changed, 390 insertions, 0 deletions
diff --git a/lib/opusfile/examples/opusfile_example.c b/lib/opusfile/examples/opusfile_example.c
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+++ b/lib/opusfile/examples/opusfile_example.c
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+/********************************************************************
+ * *
+ * 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 1994-2020 *
+ * by the Xiph.Org Foundation and contributors https://xiph.org/ *
+ * *
+ ********************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/*For fileno()*/
+#if !defined(_POSIX_SOURCE)
+# define _POSIX_SOURCE 1
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <opusfile.h>
+#if defined(_WIN32)
+# include "win32utf8.h"
+# undef fileno
+# define fileno _fileno
+#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]);
+}
+
+static void put_le32(unsigned char *_dst,opus_uint32 _x){
+ _dst[0]=(unsigned char)(_x&0xFF);
+ _dst[1]=(unsigned char)(_x>>8&0xFF);
+ _dst[2]=(unsigned char)(_x>>16&0xFF);
+ _dst[3]=(unsigned char)(_x>>24&0xFF);
+}
+
+/*Make a header for a 48 kHz, stereo, signed, 16-bit little-endian PCM WAV.*/
+static void make_wav_header(unsigned char _dst[44],ogg_int64_t _duration){
+ /*The chunk sizes are set to 0x7FFFFFFF by default.
+ Many, though not all, programs will interpret this to mean the duration is
+ "undefined", and continue to read from the file so long as there is actual
+ data.*/
+ static const unsigned char WAV_HEADER_TEMPLATE[44]={
+ 'R','I','F','F',0xFF,0xFF,0xFF,0x7F,
+ 'W','A','V','E','f','m','t',' ',
+ 0x10,0x00,0x00,0x00,0x01,0x00,0x02,0x00,
+ 0x80,0xBB,0x00,0x00,0x00,0xEE,0x02,0x00,
+ 0x04,0x00,0x10,0x00,'d','a','t','a',
+ 0xFF,0xFF,0xFF,0x7F
+ };
+ memcpy(_dst,WAV_HEADER_TEMPLATE,sizeof(WAV_HEADER_TEMPLATE));
+ if(_duration>0){
+ if(_duration>0x1FFFFFF6){
+ fprintf(stderr,"WARNING: WAV output would be larger than 2 GB.\n");
+ fprintf(stderr,
+ "Writing non-standard WAV header with invalid chunk sizes.\n");
+ }
+ else{
+ opus_uint32 audio_size;
+ audio_size=(opus_uint32)(_duration*4);
+ put_le32(_dst+4,audio_size+36);
+ put_le32(_dst+40,audio_size);
+ }
+ }
+}
+
+int main(int _argc,const char **_argv){
+ OggOpusFile *of;
+ ogg_int64_t duration;
+ unsigned char wav_header[44];
+ int ret;
+ int is_ssl;
+ int output_seekable;
+#if defined(_WIN32)
+ win32_utf8_setup(&_argc,&_argv);
+#endif
+ if(_argc!=2){
+ fprintf(stderr,"Usage: %s <file.opus>\n",_argv[0]);
+ return EXIT_FAILURE;
+ }
+ is_ssl=0;
+ 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{
+ OpusServerInfo info;
+ /*Try to treat the argument as a URL.*/
+ of=op_open_url(_argv[1],&ret,OP_GET_SERVER_INFO(&info),NULL);
+#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
+ else{
+ if(info.name!=NULL){
+ fprintf(stderr,"Station name: %s\n",info.name);
+ }
+ if(info.description!=NULL){
+ fprintf(stderr,"Station description: %s\n",info.description);
+ }
+ if(info.genre!=NULL){
+ fprintf(stderr,"Station genre: %s\n",info.genre);
+ }
+ if(info.url!=NULL){
+ fprintf(stderr,"Station homepage: %s\n",info.url);
+ }
+ if(info.bitrate_kbps>=0){
+ fprintf(stderr,"Station bitrate: %u kbps\n",
+ (unsigned)info.bitrate_kbps);
+ }
+ if(info.is_public>=0){
+ fprintf(stderr,"%s\n",
+ info.is_public?"Station is public.":"Station is private.");
+ }
+ if(info.server!=NULL){
+ fprintf(stderr,"Server software: %s\n",info.server);
+ }
+ if(info.content_type!=NULL){
+ fprintf(stderr,"Content-Type: %s\n",info.content_type);
+ }
+ is_ssl=info.is_ssl;
+ opus_server_info_clear(&info);
+ }
+ }
+ if(of==NULL){
+ fprintf(stderr,"Failed to open file '%s': %i\n",_argv[1],ret);
+ return EXIT_FAILURE;
+ }
+ duration=0;
+ output_seekable=fseek(stdout,0,SEEK_CUR)!=-1;
+ if(op_seekable(of)){
+ 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");
+ }
+ else if(!output_seekable){
+ fprintf(stderr,"WARNING: Neither input nor output are seekable.\n");
+ fprintf(stderr,
+ "Writing non-standard WAV header with invalid chunk sizes.\n");
+ }
+ make_wav_header(wav_header,duration);
+ if(!fwrite(wav_header,sizeof(wav_header),1,stdout)){
+ fprintf(stderr,"Error writing WAV header: %s\n",strerror(errno));
+ ret=EXIT_FAILURE;
+ }
+ else{
+ ogg_int64_t pcm_offset;
+ ogg_int64_t pcm_print_offset;
+ ogg_int64_t nsamples;
+ opus_int32 bitrate;
+ int prev_li;
+ 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;
+ opus_int16 pcm[120*48*2];
+ unsigned char out[120*48*2*2];
+ int li;
+ int si;
+ /*Although we would generally prefer to use the float interface, WAV
+ files with signed, 16-bit little-endian samples are far more
+ universally supported, so that's what we output.*/
+ ret=op_read_stereo(of,pcm,sizeof(pcm)/sizeof(*pcm));
+ if(ret==OP_HOLE){
+ fprintf(stderr,"\nHole detected! Corrupt file segment?\n");
+ continue;
+ }
+ else if(ret<0){
+ fprintf(stderr,"\nError decoding '%s': %i\n",_argv[1],ret);
+ if(is_ssl)fprintf(stderr,"Possible truncation attack?\n");
+ ret=EXIT_FAILURE;
+ break;
+ }
+ li=op_current_link(of);
+ if(li!=prev_li){
+ const OpusHead *head;
+ const OpusTags *tags;
+ int binary_suffix_len;
+ 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++){
+ const char *comment;
+ comment=tags->user_comments[ci];
+ if(opus_tagncompare("METADATA_BLOCK_PICTURE",22,comment)==0){
+ OpusPictureTag pic;
+ int err;
+ err=opus_picture_tag_parse(&pic,comment);
+ fprintf(stderr," %.23s",comment);
+ if(err>=0){
+ fprintf(stderr,"%u|%s|%s|%ux%ux%u",pic.type,pic.mime_type,
+ pic.description,pic.width,pic.height,pic.depth);
+ if(pic.colors!=0)fprintf(stderr,"/%u",pic.colors);
+ if(pic.format==OP_PIC_FORMAT_URL){
+ fprintf(stderr,"|%s\n",pic.data);
+ }
+ else{
+ fprintf(stderr,"|<%u bytes of image data>\n",pic.data_length);
+ }
+ opus_picture_tag_clear(&pic);
+ }
+ else fprintf(stderr,"<error parsing picture tag>\n");
+ }
+ else fprintf(stderr," %s\n",tags->user_comments[ci]);
+ }
+ if(opus_tags_get_binary_suffix(tags,&binary_suffix_len)!=NULL){
+ fprintf(stderr,"<%u bytes of unknown binary metadata>\n",
+ binary_suffix_len);
+ }
+ 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;
+ fflush(stderr);
+ }
+ 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;
+ }
+ /*Ensure the data is little-endian before writing it out.*/
+ for(si=0;si<2*ret;si++){
+ out[2*si+0]=(unsigned char)(pcm[si]&0xFF);
+ out[2*si+1]=(unsigned char)(pcm[si]>>8&0xFF);
+ }
+ if(!fwrite(out,sizeof(*out)*4*ret,1,stdout)){
+ fprintf(stderr,"\nError writing decoded audio data: %s\n",
+ strerror(errno));
+ ret=EXIT_FAILURE;
+ break;
+ }
+ nsamples+=ret;
+ prev_li=li;
+ }
+ if(ret==EXIT_SUCCESS){
+ fprintf(stderr,"\nDone: played ");
+ print_duration(stderr,nsamples,3);
+ fprintf(stderr," (%li samples @ 48 kHz).\n",(long)nsamples);
+ }
+ if(op_seekable(of)&&nsamples!=duration){
+ fprintf(stderr,"\nWARNING: "
+ "Number of output samples does not match declared file duration.\n");
+ if(!output_seekable)fprintf(stderr,"Output WAV file will be corrupt.\n");
+ }
+ if(output_seekable&&nsamples!=duration){
+ make_wav_header(wav_header,nsamples);
+ if(fseek(stdout,0,SEEK_SET)||
+ !fwrite(wav_header,sizeof(wav_header),1,stdout)){
+ fprintf(stderr,"Error rewriting WAV header: %s\n",strerror(errno));
+ ret=EXIT_FAILURE;
+ }
+ }
+ }
+ op_free(of);
+ return ret;
+}
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