diff src/opusfile-0.9/examples/seeking_example.c @ 154:4664ac0c1032

Add Opus sources and macOS builds

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/opusfile-0.9/examples/seeking_example.c	Wed Jan 23 13:48:08 2019 +0000
@@ -0,0 +1,464 @@
+/********************************************************************
+ *                                                                  *
+ * 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/ *
+ *                                                                  *
+ ********************************************************************/
+#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 <math.h>
+#include <string.h>
+#include <opusfile.h>
+#if defined(_WIN32)
+# include "win32utf8.h"
+# undef fileno
+# define fileno _fileno
+#endif
+
+/*Use shorts, they're smaller.*/
+#if !defined(OP_FIXED_POINT)
+# define OP_FIXED_POINT (1)
+#endif
+
+#if defined(OP_FIXED_POINT)
+
+typedef opus_int16 op_sample;
+
+# define op_read_native op_read
+
+/*TODO: The convergence after 80 ms of preroll is far from exact.
+  Our comparison is very rough.
+  Need to find some way to do this better.*/
+# define MATCH_TOL (16384)
+
+# define ABS(_x) ((_x)<0?-(_x):(_x))
+
+# define MATCH(_a,_b) (ABS((_a)-(_b))<MATCH_TOL)
+
+/*Don't have fixed-point downmixing code.*/
+# undef OP_WRITE_SEEK_SAMPLES
+
+#else
+
+typedef float op_sample;
+
+# define op_read_native op_read_float
+
+/*TODO: The convergence after 80 ms of preroll is far from exact.
+  Our comparison is very rough.
+  Need to find some way to do this better.*/
+# define MATCH_TOL (16384.0/32768)
+
+# define FABS(_x) ((_x)<0?-(_x):(_x))
+
+# define MATCH(_a,_b) (FABS((_a)-(_b))<MATCH_TOL)
+
+# if defined(OP_WRITE_SEEK_SAMPLES)
+/*Matrices for downmixing from the supported channel counts to stereo.*/
+static const float DOWNMIX_MATRIX[8][8][2]={
+  /*mono*/
+  {
+    {1.F,1.F}
+  },
+  /*stereo*/
+  {
+    {1.F,0.F},{0.F,1.F}
+  },
+  /*3.0*/
+  {
+    {0.5858F,0.F},{0.4142F,0.4142F},{0,0.5858F}
+  },
+  /*quadrophonic*/
+  {
+    {0.4226F,0.F},{0,0.4226F},{0.366F,0.2114F},{0.2114F,0.336F}
+  },
+  /*5.0*/
+  {
+    {0.651F,0.F},{0.46F,0.46F},{0,0.651F},{0.5636F,0.3254F},{0.3254F,0.5636F}
+  },
+  /*5.1*/
+  {
+    {0.529F,0.F},{0.3741F,0.3741F},{0.F,0.529F},{0.4582F,0.2645F},
+    {0.2645F,0.4582F},{0.3741F,0.3741F}
+  },
+  /*6.1*/
+  {
+    {0.4553F,0.F},{0.322F,0.322F},{0.F,0.4553F},{0.3943F,0.2277F},
+    {0.2277F,0.3943F},{0.2788F,0.2788F},{0.322F,0.322F}
+  },
+  /*7.1*/
+  {
+    {0.3886F,0.F},{0.2748F,0.2748F},{0.F,0.3886F},{0.3366F,0.1943F},
+    {0.1943F,0.3366F},{0.3366F,0.1943F},{0.1943F,0.3366F},{0.2748F,0.2748F}
+  }
+};
+
+static void write_samples(float *_samples,int _nsamples,int _nchannels){
+  float stereo_pcm[120*48*2];
+  int   i;
+  for(i=0;i<_nsamples;i++){
+    float l;
+    float r;
+    int   ci;
+    l=r=0.F;
+    for(ci=0;ci<_nchannels;ci++){
+      l+=DOWNMIX_MATRIX[_nchannels-1][ci][0]*_samples[i*_nchannels+ci];
+      r+=DOWNMIX_MATRIX[_nchannels-1][ci][1]*_samples[i*_nchannels+ci];
+    }
+    stereo_pcm[2*i+0]=l;
+    stereo_pcm[2*i+1]=r;
+  }
+  fwrite(stereo_pcm,sizeof(*stereo_pcm)*2,_nsamples,stdout);
+}
+# endif
+
+#endif
+
+static long nfailures;
+
+static void verify_seek(OggOpusFile *_of,opus_int64 _byte_offset,
+ ogg_int64_t _pcm_offset,ogg_int64_t _pcm_length,op_sample *_bigassbuffer){
+  opus_int64  byte_offset;
+  ogg_int64_t pcm_offset;
+  ogg_int64_t duration;
+  op_sample   buffer[120*48*8];
+  int         nchannels;
+  int         nsamples;
+  int         li;
+  int         lj;
+  int         i;
+  byte_offset=op_raw_tell(_of);
+  if(_byte_offset!=-1&&byte_offset<_byte_offset){
+    fprintf(stderr,"\nRaw position out of tolerance: requested %li, "
+     "got %li.\n",(long)_byte_offset,(long)byte_offset);
+    nfailures++;
+  }
+  pcm_offset=op_pcm_tell(_of);
+  if(_pcm_offset!=-1&&pcm_offset>_pcm_offset){
+    fprintf(stderr,"\nPCM position out of tolerance: requested %li, "
+     "got %li.\n",(long)_pcm_offset,(long)pcm_offset);
+    nfailures++;
+  }
+  if(pcm_offset<0||pcm_offset>_pcm_length){
+    fprintf(stderr,"\nPCM position out of bounds: got %li.\n",
+     (long)pcm_offset);
+    nfailures++;
+  }
+  nsamples=op_read_native(_of,buffer,sizeof(buffer)/sizeof(*buffer),&li);
+  if(nsamples<0){
+    fprintf(stderr,"\nFailed to read PCM data after seek: %i\n",nsamples);
+    nfailures++;
+    li=op_current_link(_of);
+  }
+  for(lj=0;lj<li;lj++){
+    duration=op_pcm_total(_of,lj);
+    if(0<=pcm_offset&&pcm_offset<duration){
+      fprintf(stderr,"\nPCM data after seek came from the wrong link: "
+       "expected %i, got %i.\n",lj,li);
+      nfailures++;
+    }
+    pcm_offset-=duration;
+    if(_bigassbuffer!=NULL)_bigassbuffer+=op_channel_count(_of,lj)*duration;
+  }
+  duration=op_pcm_total(_of,li);
+  if(pcm_offset+nsamples>duration){
+    fprintf(stderr,"\nPCM data after seek exceeded link duration: "
+     "limit %li, got %li.\n",(long)duration,(long)(pcm_offset+nsamples));
+    nfailures++;
+  }
+  nchannels=op_channel_count(_of,li);
+  if(_bigassbuffer!=NULL){
+    for(i=0;i<nsamples*nchannels;i++){
+      if(!MATCH(buffer[i],_bigassbuffer[pcm_offset*nchannels+i])){
+        ogg_int64_t j;
+        fprintf(stderr,"\nData after seek doesn't match declared PCM "
+         "position: mismatch %G\n",
+         (double)buffer[i]-_bigassbuffer[pcm_offset*nchannels+i]);
+        for(j=0;j<duration-nsamples;j++){
+          for(i=0;i<nsamples*nchannels;i++){
+            if(!MATCH(buffer[i],_bigassbuffer[j*nchannels+i]))break;
+          }
+          if(i==nsamples*nchannels){
+            fprintf(stderr,"\nData after seek appears to match position %li.\n",
+             (long)i);
+          }
+        }
+        nfailures++;
+        break;
+      }
+    }
+  }
+#if defined(OP_WRITE_SEEK_SAMPLES)
+  write_samples(buffer,nsamples,nchannels);
+#endif
+}
+
+#define OP_MIN(_a,_b) ((_a)<(_b)?(_a):(_b))
+
+/*A simple wrapper that lets us count the number of underlying seek calls.*/
+
+static op_seek_func real_seek;
+
+static long nreal_seeks;
+
+static int seek_stat_counter(void *_stream,opus_int64 _offset,int _whence){
+  if(_whence==SEEK_SET)nreal_seeks++;
+  /*SEEK_CUR with an offset of 0 is free, as is SEEK_END with an offset of 0
+     (assuming we know the file size), so don't count them.*/
+  else if(_offset!=0)nreal_seeks++;
+  return (*real_seek)(_stream,_offset,_whence);
+}
+
+#define NSEEK_TESTS (1000)
+
+static void print_duration(FILE *_fp,ogg_int64_t _nsamples){
+  ogg_int64_t seconds;
+  ogg_int64_t minutes;
+  ogg_int64_t hours;
+  ogg_int64_t days;
+  ogg_int64_t weeks;
+  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);
+  fprintf(_fp,".%03is",(int)(_nsamples+24)/48);
+}
+
+int main(int _argc,const char **_argv){
+  OpusFileCallbacks  cb;
+  OggOpusFile       *of;
+  void              *fp;
+#if defined(_WIN32)
+  win32_utf8_setup(&_argc,&_argv);
+#endif
+  if(_argc!=2){
+    fprintf(stderr,"Usage: %s <file.opus>\n",_argv[0]);
+    return EXIT_FAILURE;
+  }
+  memset(&cb,0,sizeof(cb));
+  if(strcmp(_argv[1],"-")==0)fp=op_fdopen(&cb,fileno(stdin),"rb");
+  else{
+    /*Try to treat the argument as a URL.*/
+    fp=op_url_stream_create(&cb,_argv[1],
+     OP_SSL_SKIP_CERTIFICATE_CHECK(1),NULL);
+    /*Fall back assuming it's a regular file name.*/
+    if(fp==NULL)fp=op_fopen(&cb,_argv[1],"rb");
+  }
+  if(cb.seek!=NULL){
+    real_seek=cb.seek;
+    cb.seek=seek_stat_counter;
+  }
+  of=op_open_callbacks(fp,&cb,NULL,0,NULL);
+  if(of==NULL){
+    fprintf(stderr,"Failed to open file '%s'.\n",_argv[1]);
+    return EXIT_FAILURE;
+  }
+  if(op_seekable(of)){
+    op_sample   *bigassbuffer;
+    ogg_int64_t  size;
+    ogg_int64_t  pcm_offset;
+    ogg_int64_t  pcm_length;
+    ogg_int64_t  nsamples;
+    long         max_seeks;
+    int          nlinks;
+    int          ret;
+    int          li;
+    int          i;
+    /*Because we want to do sample-level verification that the seek does what
+       it claimed, decode the entire file into memory.*/
+    nlinks=op_link_count(of);
+    fprintf(stderr,"Opened file containing %i links with %li seeks "
+     "(%0.3f per link).\n",nlinks,nreal_seeks,nreal_seeks/(double)nlinks);
+    /*Reset the seek counter.*/
+    nreal_seeks=0;
+    nsamples=0;
+    for(li=0;li<nlinks;li++){
+      nsamples+=op_pcm_total(of,li)*op_channel_count(of,li);
+    }
+/*Until we find another way to do the comparisons that solves the MATCH_TOL
+   problem, disable this.*/
+#if 0
+    bigassbuffer=_ogg_malloc(sizeof(*bigassbuffer)*nsamples);
+    if(bigassbuffer==NULL){
+      fprintf(stderr,
+       "Buffer allocation failed. Seek offset detection disabled.\n");
+    }
+#else
+    bigassbuffer=NULL;
+#endif
+    pcm_offset=op_pcm_tell(of);
+    if(pcm_offset!=0){
+      fprintf(stderr,"Initial PCM offset was not 0, got %li instead.!\n",
+       (long)pcm_offset);
+      nfailures++;
+    }
+/*Disabling the linear scan for now.
+  Only test on non-borken files!*/
+#if 0
+    {
+      op_sample    smallerbuffer[120*48*8];
+      ogg_int64_t  pcm_print_offset;
+      ogg_int64_t  si;
+      opus_int32   bitrate;
+      int          saw_hole;
+      pcm_print_offset=pcm_offset-48000;
+      bitrate=0;
+      saw_hole=0;
+      for(si=0;si<nsamples;){
+        ogg_int64_t next_pcm_offset;
+        opus_int32  next_bitrate;
+        op_sample  *buf;
+        int         buf_size;
+        buf=bigassbuffer==NULL?smallerbuffer:bigassbuffer+si;
+        buf_size=(int)OP_MIN(nsamples-si,
+         (int)(sizeof(smallerbuffer)/sizeof(*smallerbuffer))),
+        ret=op_read_native(of,buf,buf_size,&li);
+        if(ret==OP_HOLE){
+          /*Only warn once in a row.*/
+          if(saw_hole)continue;
+          saw_hole=1;
+          /*This is just a warning.
+            As long as the timestamps are still contiguous we're okay.*/
+          fprintf(stderr,"\nHole in PCM data at sample %li\n",
+           (long)pcm_offset);
+          continue;
+        }
+        else if(ret<=0){
+          fprintf(stderr,"\nFailed to read PCM data: %i\n",ret);
+          exit(EXIT_FAILURE);
+        }
+        saw_hole=0;
+        /*If we have gaps in the PCM positions, seeking is not likely to work
+           near them.*/
+        next_pcm_offset=op_pcm_tell(of);
+        if(pcm_offset+ret!=next_pcm_offset){
+          fprintf(stderr,"\nGap in PCM offset: expecting %li, got %li\n",
+           (long)(pcm_offset+ret),(long)next_pcm_offset);
+          nfailures++;
+        }
+        pcm_offset=next_pcm_offset;
+        si+=ret*op_channel_count(of,li);
+        if(pcm_offset>=pcm_print_offset+48000){
+          next_bitrate=op_bitrate_instant(of);
+          if(next_bitrate>=0)bitrate=next_bitrate;
+          fprintf(stderr,"\r%s... [%li left] (%0.3f kbps)               ",
+           bigassbuffer==NULL?"Scanning":"Loading",nsamples-si,bitrate/1000.0);
+          pcm_print_offset=pcm_offset;
+        }
+      }
+      ret=op_read_native(of,smallerbuffer,8,&li);
+      if(ret<0){
+        fprintf(stderr,"Failed to read PCM data: %i\n",ret);
+        nfailures++;
+      }
+      if(ret>0){
+        fprintf(stderr,"Read too much PCM data!\n");
+        nfailures++;
+      }
+    }
+#endif
+    pcm_length=op_pcm_total(of,-1);
+    size=op_raw_total(of,-1);
+    fprintf(stderr,"\rLoaded (%0.3f kbps average).                        \n",
+     op_bitrate(of,-1)/1000.0);
+    fprintf(stderr,"Testing raw seeking to random places in %li bytes...\n",
+     (long)size);
+    max_seeks=0;
+    for(i=0;i<NSEEK_TESTS;i++){
+      long nseeks_tmp;
+      opus_int64 byte_offset;
+      nseeks_tmp=nreal_seeks;
+      byte_offset=(opus_int64)(rand()/(double)RAND_MAX*size);
+      fprintf(stderr,"\r\t%3i [raw position %li]...                ",
+       i,(long)byte_offset);
+      ret=op_raw_seek(of,byte_offset);
+      if(ret<0){
+        fprintf(stderr,"\nSeek failed: %i.\n",ret);
+        nfailures++;
+      }
+      if(i==28){
+        i=28;
+      }
+      verify_seek(of,byte_offset,-1,pcm_length,bigassbuffer);
+      nseeks_tmp=nreal_seeks-nseeks_tmp;
+      max_seeks=nseeks_tmp>max_seeks?nseeks_tmp:max_seeks;
+    }
+    fprintf(stderr,"\rTotal seek operations: %li (%.3f per raw seek, %li maximum).\n",
+     nreal_seeks,nreal_seeks/(double)NSEEK_TESTS,max_seeks);
+    nreal_seeks=0;
+    fprintf(stderr,"Testing exact PCM seeking to random places in %li "
+     "samples (",(long)pcm_length);
+    print_duration(stderr,pcm_length);
+    fprintf(stderr,")...\n");
+    max_seeks=0;
+    for(i=0;i<NSEEK_TESTS;i++){
+      ogg_int64_t pcm_offset2;
+      long        nseeks_tmp;
+      nseeks_tmp=nreal_seeks;
+      pcm_offset=(ogg_int64_t)(rand()/(double)RAND_MAX*pcm_length);
+      fprintf(stderr,"\r\t%3i [PCM position %li]...                ",
+       i,(long)pcm_offset);
+      ret=op_pcm_seek(of,pcm_offset);
+      if(ret<0){
+        fprintf(stderr,"\nSeek failed: %i.\n",ret);
+        nfailures++;
+      }
+      pcm_offset2=op_pcm_tell(of);
+      if(pcm_offset!=pcm_offset2){
+        fprintf(stderr,"\nDeclared PCM position did not perfectly match "
+         "request: requested %li, got %li.\n",
+         (long)pcm_offset,(long)pcm_offset2);
+        nfailures++;
+      }
+      verify_seek(of,-1,pcm_offset,pcm_length,bigassbuffer);
+      nseeks_tmp=nreal_seeks-nseeks_tmp;
+      max_seeks=nseeks_tmp>max_seeks?nseeks_tmp:max_seeks;
+    }
+    fprintf(stderr,"\rTotal seek operations: %li (%.3f per exact seek, %li maximum).\n",
+     nreal_seeks,nreal_seeks/(double)NSEEK_TESTS,max_seeks);
+    nreal_seeks=0;
+    fprintf(stderr,"OK.\n");
+    _ogg_free(bigassbuffer);
+  }
+  else{
+    fprintf(stderr,"Input was not seekable.\n");
+    exit(EXIT_FAILURE);
+  }
+  op_free(of);
+  if(nfailures>0){
+    fprintf(stderr,"FAILED: %li failure conditions encountered.\n",nfailures);
+  }
+  return nfailures!=0?EXIT_FAILURE:EXIT_SUCCESS;
+}