comparison src/libvorbis-1.3.3/lib/analysis.c @ 1:05aa0afa9217

Bring in flac, ogg, vorbis

+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis 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 OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
+ * by the Xiph.Org Foundation http://www.xiph.org/                  *
+ *                                                                  *
+ ********************************************************************
+
+ function: single-block PCM analysis mode dispatch
+ last mod: $Id: analysis.c 16226 2009-07-08 06:43:49Z xiphmont $
+
+ ********************************************************************/
+
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <ogg/ogg.h>
+#include "vorbis/codec.h"
+#include "codec_internal.h"
+#include "registry.h"
+#include "scales.h"
+#include "os.h"
+#include "misc.h"
+
+/* decides between modes, dispatches to the appropriate mapping. */
+int vorbis_analysis(vorbis_block *vb, ogg_packet *op){
+  int ret,i;
+  vorbis_block_internal *vbi=vb->internal;
+
+  vb->glue_bits=0;
+  vb->time_bits=0;
+  vb->floor_bits=0;
+  vb->res_bits=0;
+
+  /* first things first.  Make sure encode is ready */
+  for(i=0;i<PACKETBLOBS;i++)
+    oggpack_reset(vbi->packetblob[i]);
+
+  /* we only have one mapping type (0), and we let the mapping code
+     itself figure out what soft mode to use.  This allows easier
+     bitrate management */
+
+  if((ret=_mapping_P[0]->forward(vb)))
+    return(ret);
+
+  if(op){
+    if(vorbis_bitrate_managed(vb))
+      /* The app is using a bitmanaged mode... but not using the
+         bitrate management interface. */
+      return(OV_EINVAL);
+
+    op->packet=oggpack_get_buffer(&vb->opb);
+    op->bytes=oggpack_bytes(&vb->opb);
+    op->b_o_s=0;
+    op->e_o_s=vb->eofflag;
+    op->granulepos=vb->granulepos;
+    op->packetno=vb->sequence; /* for sake of completeness */
+  }
+  return(0);
+}
+
+#ifdef ANALYSIS
+int analysis_noisy=1;
+
+/* there was no great place to put this.... */
+void _analysis_output_always(char *base,int i,float *v,int n,int bark,int dB,ogg_int64_t off){
+  int j;
+  FILE *of;
+  char buffer[80];
+
+  sprintf(buffer,"%s_%d.m",base,i);
+  of=fopen(buffer,"w");
+
+  if(!of)perror("failed to open data dump file");
+
+  for(j=0;j<n;j++){
+    if(bark){
+      float b=toBARK((4000.f*j/n)+.25);
+      fprintf(of,"%f ",b);
+    }else
+      if(off!=0)
+        fprintf(of,"%f ",(double)(j+off)/8000.);
+      else
+        fprintf(of,"%f ",(double)j);
+
+    if(dB){
+      float val;
+      if(v[j]==0.)
+        val=-140.;
+      else
+        val=todB(v+j);
+      fprintf(of,"%f\n",val);
+    }else{
+      fprintf(of,"%f\n",v[j]);
+    }
+  }
+  fclose(of);
+}
+
+void _analysis_output(char *base,int i,float *v,int n,int bark,int dB,
+                      ogg_int64_t off){
+  if(analysis_noisy)_analysis_output_always(base,i,v,n,bark,dB,off);
+}
+
+#endif
+
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