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-rw-r--r--vorbis/lib/analysis.c119
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diff --git a/vorbis/lib/analysis.c b/vorbis/lib/analysis.c
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+/********************************************************************
+ * *
+ * 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
+
+ ********************************************************************/
+
+#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
+
+
+
+
+
+
+
+
+
+
+