/********************************************************************
* *
- * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
- * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
- * PLEASE READ THESE TERMS DISTRIBUTING. *
+ * 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 OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-1999 *
- * by 1999 Monty <monty@xiph.org> and The XIPHOPHORUS Company *
- * http://www.xiph.org/ *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
- function: single-block PCM analysis
- author: Monty <xiphmont@mit.edu>
- modifications by: Monty
- last modification date: Aug 09 1999
+ function: single-block PCM analysis mode dispatch
********************************************************************/
#include <stdio.h>
+#include <string.h>
#include <math.h>
-#include "lpc.h"
-#include "codec.h"
-#include "envelope.h"
-#include "mdct.h"
-#include "psy.h"
-
-int vorbis_analysis(vorbis_block *vb){
- int i;
- double *window=vb->vd->window[vb->W][vb->lW][vb->nW];
- int n=vb->pcmend;
- static int frameno=0;
-
- _ve_envelope_sparsify(vb);
- _ve_envelope_apply(vb,0);
-
- for(i=0;i<vb->pcm_channels;i++)
- mdct_forward(&vb->vd->vm[vb->W],vb->pcm[i],vb->pcm[i],window);
-
- /* handle vectors to be encoded one at a time. The PCM storage now
- has twice the space we need in the MDCT domain, so mix down into
- the second half of storage */
-
- /* XXXX Mix down to C+D stereo now */
- {
- double *C=vb->pcm[0]+n/2;
- double *D=vb->pcm[1]+n/2;
- double *L=vb->pcm[0];
- double *R=vb->pcm[1];
- for(i=0;i<n/2;i++){
- C[i]=(L[i]+R[i])*.5;
- D[i]=(L[i]-R[i])*.5;
- }
+#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);
+}
- /* extract the spectral envelope and residue */
-
- {
- double floor1[n/2];
- double floor2[n/2];
- double curve[n/2];
- double work[n/2];
- double lpc1[40];
- double lpc2[40];
- double amp1,amp2;
-
- memset(floor1,0,sizeof(floor1));
- memset(floor2,0,sizeof(floor2));
- memset(work,0,sizeof(work));
-
- _vp_noise_floor(C,floor1,n/2);
- /* _vp_noise_floor(D,floor1,n/2);*/
- _vp_mask_floor(C,floor1,n/2);
- /* _vp_mask_floor(D,floor1,n/2);*/
-
- _vp_psy_sparsify(C,floor1,n/2);
- _vp_psy_sparsify(D,floor1,n/2);
-
-
- memmove(floor1+n/4,floor1,(n/4)*sizeof(double));
-
- amp2=sqrt(vorbis_curve_to_lpc(floor1,n/2,lpc2,20));
- vorbis_lpc_to_curve(work,n/2,lpc2,amp2,20);
-
-
- /* amp2=sqrt(vorbis_curve_to_lpc(floor1,n/2/8,lpc2,12));
- vorbis_lpc_to_curve(work,n/2/8,lpc2,amp2,12);
- amp2=sqrt(vorbis_curve_to_lpc(floor1+n/2/8,n/2/8,lpc2,10));
- vorbis_lpc_to_curve(work+n/2/8,n/2/8,lpc2,amp2,10);
- amp2=sqrt(vorbis_curve_to_lpc(floor1+n/2/4,n/2/4,lpc2,6));
- vorbis_lpc_to_curve(work+n/2/4,n/2/4,lpc2,amp2,6);
- amp2=sqrt(vorbis_curve_to_lpc(floor1+n/2/2,n/2/2,lpc2,6));
- vorbis_lpc_to_curve(work+n/2/2,n/2/2,lpc2,amp2,6);*/
-
- _vp_psy_quantize(C,work,n/2);
- _vp_psy_quantize(D,work,n/2);
-
-
- {
- FILE *out;
- char buffer[80];
-
-
- sprintf(buffer,"mdctC%d.m",frameno);
- out=fopen(buffer,"w+");
- for(i=0;i<n/2;i++)
- fprintf(out,"%g\n",fabs(C[i]));
- fclose(out);
-
- sprintf(buffer,"mdctD%d.m",frameno);
- out=fopen(buffer,"w+");
- for(i=0;i<n/2;i++)
- fprintf(out,"%g\n",fabs(D[i]));
- fclose(out);
-
- sprintf(buffer,"floor%d.m",frameno);
- out=fopen(buffer,"w+");
- for(i=0;i<n/2;i++)
- fprintf(out,"%g\n",floor1[i]);
- fclose(out);
-
-
- sprintf(buffer,"lpc%d.m",frameno);
- out=fopen(buffer,"w+");
- for(i=0;i<n/2;i++)
- fprintf(out,"%g\n",work[i]);
- fclose(out);
-
- frameno++;
- }
+#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]);
}
}
- return(0);
+ fclose(of);
}
-int vorbis_analysis_packetout(vorbis_block *vb, ogg_packet *op){
+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
+
+
+
- /* find block's envelope vector and apply it */
- /* the real analysis begins; forward MDCT with window */
-
- /* Noise floor, resolution floor */
- /* encode the floor into LSP; get the actual floor back for quant */
- /* use noise floor, res floor for culling, actual floor for quant */
- /* encode residue */
-}
projects / platform / upstream / libvorbis.git / blobdiff