X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=examples%2Fencoder_example.c;h=d46a051a2dcdee553088b993527d4cadc2f0feda;hb=1ffc217cb77636d1a06939638d14c583e1e89525;hp=95cfe552cc16407aef7bd600813f533cd1ecfa5b;hpb=700cd11616fe7d2c331020e04239dcc0460b5fc6;p=platform%2Fupstream%2Flibvorbis.git

diff --git a/examples/encoder_example.c b/examples/encoder_example.c
index 95cfe55..d46a051 100644
--- a/examples/encoder_example.c
+++ b/examples/encoder_example.c
@@ -11,7 +11,6 @@
  ********************************************************************
 
  function: simple example encoder
- last mod: $Id$
 
  ********************************************************************/
 
@@ -41,12 +40,12 @@ signed char readbuffer[READ*4+44]; /* out of the data segment, not the stack */
 
 int main(){
   ogg_stream_state os; /* take physical pages, weld into a logical
-			  stream of packets */
+                          stream of packets */
   ogg_page         og; /* one Ogg bitstream page.  Vorbis packets are inside */
   ogg_packet       op; /* one raw packet of data for decode */
-  
+
   vorbis_info      vi; /* struct that stores all the static vorbis bitstream
-			  settings */
+                          settings */
   vorbis_comment   vc; /* struct that stores all the user comments */
 
   vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
@@ -62,14 +61,14 @@ int main(){
                           /* this also lets the user set stdin and stdout */
 #endif
 
-  /* we cheat on the WAV header; we just bypass 44 bytes and never
-     verify that it matches 16bit/stereo/44.1kHz.  This is just an
-     example, after all. */
+  /* we cheat on the WAV header; we just bypass 44 bytes (simplest WAV
+     header is 44 bytes) and assume that the data is 44.1khz, stereo, 16 bit
+     little endian pcm samples. This is just an example, after all. */
 
 #ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
   /* if we were reading/writing a file, it would also need to in
      binary mode, eg, fopen("file.wav","wb"); */
-  /* Beware the evil ifdef. We avoid these where we can, but this one we 
+  /* 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 );
@@ -85,8 +84,7 @@ int main(){
   {
     fread(readbuffer,1,2,stdin);
 
-    if ( ! strncmp((char*)readbuffer, "da", 2) )
-    {
+    if ( ! strncmp((char*)readbuffer, "da", 2) ){
       founddata = 1;
       fread(readbuffer,1,6,stdin);
       break;
@@ -103,15 +101,15 @@ int main(){
   /*********************************************************************
    Encoding using a VBR quality mode.  The usable range is -.1
    (lowest quality, smallest file) to 1. (highest quality, largest file).
-   Example quality mode .4: 44kHz stereo coupled, roughly 128kbps VBR 
-  
+   Example quality mode .4: 44kHz stereo coupled, roughly 128kbps VBR
+
    ret = vorbis_encode_init_vbr(&vi,2,44100,.4);
 
    ---------------------------------------------------------------------
 
    Encoding using an average bitrate mode (ABR).
-   example: 44kHz stereo coupled, average 128kbps VBR 
-  
+   example: 44kHz stereo coupled, average 128kbps VBR
+
    ret = vorbis_encode_init(&vi,2,44100,-1,128000,-1);
 
    ---------------------------------------------------------------------
@@ -141,7 +139,7 @@ int main(){
   /* set up the analysis state and auxiliary encoding storage */
   vorbis_analysis_init(&vd,&vi);
   vorbis_block_init(&vd,&vb);
-  
+
   /* set up our packet->stream encoder */
   /* pick a random serial number; that way we can more likely build
      chained streams just by concatenation */
@@ -162,22 +160,22 @@ int main(){
 
     vorbis_analysis_headerout(&vd,&vc,&header,&header_comm,&header_code);
     ogg_stream_packetin(&os,&header); /* automatically placed in its own
-					 page */
+                                         page */
     ogg_stream_packetin(&os,&header_comm);
     ogg_stream_packetin(&os,&header_code);
 
-	/* This ensures the actual
-	 * audio data will start on a new page, as per spec
-	 */
-	while(!eos){
-		int result=ogg_stream_flush(&os,&og);
-		if(result==0)break;
-		fwrite(og.header,1,og.header_len,stdout);
-		fwrite(og.body,1,og.body_len,stdout);
-	}
+    /* This ensures the actual
+     * audio data will start on a new page, as per spec
+     */
+    while(!eos){
+      int result=ogg_stream_flush(&os,&og);
+      if(result==0)break;
+      fwrite(og.header,1,og.header_len,stdout);
+      fwrite(og.body,1,og.body_len,stdout);
+    }
 
   }
-  
+
   while(!eos){
     long i;
     long bytes=fread(readbuffer,1,READ*4,stdin); /* stereo hardwired here */
@@ -194,15 +192,15 @@ int main(){
 
       /* expose the buffer to submit data */
       float **buffer=vorbis_analysis_buffer(&vd,READ);
-      
+
       /* uninterleave samples */
       for(i=0;i<bytes/4;i++){
-	buffer[0][i]=((readbuffer[i*4+1]<<8)|
-		      (0x00ff&(int)readbuffer[i*4]))/32768.f;
-	buffer[1][i]=((readbuffer[i*4+3]<<8)|
-		      (0x00ff&(int)readbuffer[i*4+2]))/32768.f;
+        buffer[0][i]=((readbuffer[i*4+1]<<8)|
+                      (0x00ff&(int)readbuffer[i*4]))/32768.f;
+        buffer[1][i]=((readbuffer[i*4+3]<<8)|
+                      (0x00ff&(int)readbuffer[i*4+2]))/32768.f;
       }
-    
+
       /* tell the library how much we actually submitted */
       vorbis_analysis_wrote(&vd,i);
     }
@@ -217,37 +215,37 @@ int main(){
       vorbis_bitrate_addblock(&vb);
 
       while(vorbis_bitrate_flushpacket(&vd,&op)){
-	
-	/* weld the packet into the bitstream */
-	ogg_stream_packetin(&os,&op);
-	
-	/* write out pages (if any) */
-	while(!eos){
-	  int result=ogg_stream_pageout(&os,&og);
-	  if(result==0)break;
-	  fwrite(og.header,1,og.header_len,stdout);
-	  fwrite(og.body,1,og.body_len,stdout);
-	  
-	  /* this could be set above, but for illustrative purposes, I do
-	     it here (to show that vorbis does know where the stream ends) */
-	  
-	  if(ogg_page_eos(&og))eos=1;
-	}
+
+        /* weld the packet into the bitstream */
+        ogg_stream_packetin(&os,&op);
+
+        /* write out pages (if any) */
+        while(!eos){
+          int result=ogg_stream_pageout(&os,&og);
+          if(result==0)break;
+          fwrite(og.header,1,og.header_len,stdout);
+          fwrite(og.body,1,og.body_len,stdout);
+
+          /* this could be set above, but for illustrative purposes, I do
+             it here (to show that vorbis does know where the stream ends) */
+
+          if(ogg_page_eos(&og))eos=1;
+        }
       }
     }
   }
 
   /* clean up and exit.  vorbis_info_clear() must be called last */
-  
+
   ogg_stream_clear(&os);
   vorbis_block_clear(&vb);
   vorbis_dsp_clear(&vd);
   vorbis_comment_clear(&vc);
   vorbis_info_clear(&vi);
-  
+
   /* ogg_page and ogg_packet structs always point to storage in
      libvorbis.  They're never freed or manipulated directly */
-  
+
   fprintf(stderr,"Done.\n");
   return(0);
 }