/********************************************************************
* *
- * 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: PCM data vector blocking, windowing and dis/reassembly
- author: Monty <xiphmont@mit.edu>
- modifications by: Monty
- last modification date: Jun 26 1999
-
- Handle windowing, overlap-add, etc of the original (and synthesized)
- PCM vectors. This is made more amusing by Vorbis' current two allowed
- block sizes (512 and 2048 elements/channel).
-
- Vorbis manipulates the dynamic range of the incoming PCM data
- envelope to minimise time-domain energy leakage from percussive and
- plosive waveforms being quantized in the MDCT domain.
+ function: single-block PCM analysis mode dispatch
********************************************************************/
-#include <stdlib.h>
-
-/* pcm accumulator and multipliers
- examples (not exhaustive):
-
- <-------------- lW----------------->
- <--------------- W ---------------->
-: .....|..... _______________ |
-: .''' | '''_--- | |\ |
-:.....''' |_____--- '''......| | \_______|
-:.................|__________________|_______|__|______|
- |<------ Sl ------>| > Sr < |endW
- |beginSl |endSl | |endSr
- |beginW |endlW |beginSr
- mult[0] mult[n]
-
-
- |< lW >|
- <--------------- W ---------------->
- | | .. ______________ |
- | | ' `/ | ---_ |
- |___.'___/`. | ---_____|
- |_______|__|_______|_________________|
- | >|Sl|< |<------ Sr ----->|endW
- | | |endSl |beginSr |endSr
- |beginW | |endlW
- mult[0] |beginSl mult[n]
-
- <-------------- lW----------------->
- |<-W-->|
-: .............. __ | |
-: .''' |`/ \ | |
-:.....''' |/`...\|...|
-:.........................|__||__|___|
- |Sl||Sr|endW
- | || |endSr
- | ||beginSr
- | |endSl
- |beginSl
- |beginW
- mult[0]
- mult[n]
-*/
-
-typedef struct vorbis_state{
- int samples_per_envelope_step;
- int block_size[2];
- double *window[2][2][2]; /* windowsize, leadin, leadout */
-
- double **pcm;
- int pcm_storage;
- int pcm_channels;
- int pcm_current;
-
- double **deltas;
- int **multipliers;
- int envelope_storage;
- int envelope_channels;
- int envelope_current;
-
- int initflag;
-
- long lW;
- long W;
- long Sl;
- long Sr;
-
- long beginW;
- long endW;
- long beginSl;
- long endSl;
- long beginSr;
- long endSr;
-
- long frame;
- long samples;
-
-} vorbis_state;
-
-/* arbitrary settings and spec-mandated numbers get filled in here */
-void vorbis_init_state(vorbis_state *v,int channels,int mode){
- memset(v,0,sizeof(vorbis_state));
- v->samples_per_envelope_step=64;
- v->block_size[0]=512;
- v->block_size[1]=2048;
-
- v->window[0][0][0]=vorbis_window(v->block_size[0],
- v->block_size[0]/2,v->block_size[0]/2);
- v->window[1][0][0]=vorbis_window(v->block_size[1],
- v->block_size[0]/2,v->block_size[0]/2);
- v->window[1][0][1]=vorbis_window(v->block_size[1],
- v->block_size[0]/2,v->block_size[1]/2);
- v->window[1][1][0]=vorbis_window(v->block_size[1],
- v->block_size[1]/2,v->block_size[0]/2);
- v->window[1][1][1]=vorbis_window(v->block_size[1],
- v->block_size[1]/2,v->block_size[1]/2);
-
- /* initialize the storage vectors to a decent size greater than the
- minimum */
-
- v->pcm_storage=8192; /* 8k samples. we'll assume later that we have
- a minimum of twice the blocksize (2k) of
- accumulated samples in analysis */
- v->pcm_channels=channels;
- v->pcm=malloc(channels*sizeof(double *));
- {
- int i;
- for(i=0;i<channels;i++)
- v->pcm[i]=calloc(v->pcm_storage,sizeof(double));
- }
-
- /* Initialize the envelope multiplier storage */
-
- v->envelope_storage=v->pcmstorage/v->samples_per_envelope_step+1;
- v->envelope_channels=channels;
- v->deltas=calloc(v->envelope_channels,sizeof(double *));
- v->multipliers=calloc(v->envelope_channels,sizeof(int *));
- {
- int i;
- for(i=0;i<v->envelope_channels;i++){
- v->deltas[i]=calloc(v->envelope_storage,sizeof(double));
- v->multipliers[i]=calloc(v->envelope_storage,sizeof(int));
- }
- }
-
- /* all 1 (large block) or 0 (small block) */
- /*v->lW=0; previous window size */
- /*v->W=0; determined during analysis */
- /*v->Sl=0; previous Sr */
- /*v->Sr=0; determined during analysis */
-
- /* all vector indexes; multiples of samples_per_envelope_step */
- /*v->beginW=0; determined during analysis */
- /*v->endW=0; determined during analysis */
- v->beginSl=v->block_size[1]/4-v->block_size[0]/4;
- v->endSl=v->beginSl+v->block_size[0]/2;
- /*v->beginSr=0; determined during analysis */
- /*v->endSr=0; determined during analysis */
-
- /*v->frame=0;*/
- /*v->samples=0;*/
-
- v->pcm_current=v->endSl;
- v->last_multiplier=v->endSl/v->samples_per_envelope_step+1;
-
- v->initflag=1;
-}
-
-void vorbis_free_state(vorbis_state *v){
- int i,j,k;
- if(v){
- for(i=0;i<2;i++)
- for(j=0;j<2;j++)
- for(k=0;k<2;k++)
- if(v->window[i][j][k])free(v->window[i][j][k]);
- if(v->pcm){
- for(i=0;i<v->pcm_channels;i++)
- if(v->pcm[i])free(v->pcm[i]);
- free(v->pcm);
- }
- if(v->deltas){
- for(i=0;i<v->envelope_channels;i++)
- if(v->deltas[i])free(v->deltas[i]);
- free(v->deltas);
- }
- if(v->multipliers){
- for(i=0;i<v->envelope_channels;i++)
- if(v->multipliers[i])free(v->multipliers[i]);
- free(v->multipliers);
- }
- free(v);
+#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);
}
-int vorbis_analysis(vorbis_state *v, double **pcm, int vals){
- int i;
+#ifdef ANALYSIS
+int analysis_noisy=1;
- /* vorbis encode state initialization */
- if(!v->initflag)
- vorbis_init_settings(v);
+/* 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];
- /* first we need to handle incoming data (if any) */
-
- if(vals>0){
- /* Do we have enough storage space for the incoming data? If not,
- expand the PCM storage */
+ sprintf(buffer,"%s_%d.m",base,i);
+ of=fopen(buffer,"w");
- if(v->pcm_current+vals>=pcm_storage){
- for(i=0;i<v->pcm_channels;i++)
- v->pcm[i]=realloc(v->pcm[i],
- (v->pcm_current+vals*2)*sizeof(double));
- v->pcm_storage=v->pcm_current+vals*2;
- }
-
- /* If we're encoding the end of the stream and we're handing in
- padding, vals will be set, but the passed in buffer will be
- NULL; just add in zeroes */
+ if(!of)perror("failed to open data dump file");
- for(i=0;i<v->pcm_channels;i++)
- if(pcm==NULL)
- memset(v->pcm[i]+v->pcm_current,0,vals*sizeof(double));
+ 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
- memcpy(v->pcm[i]+v->pcm_current,pcm[i],vals*sizeof(double));
+ fprintf(of,"%f ",(double)j);
- v->pcm_current+=vals;
+ 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);
+}
- /* Do we definately have enough for a frame? We assume we have more
- than actually necessary to encode the current block to make some
- analysis easier. */
-
- if(v->pcm_current-v->endSl<v->blocksize[1]*2)
- return(0);
-
- /* we have enough. begin analysis */
- /* complete the envelope analysis vectors */
-
-
-
- /* decide the blocksize of this frame */
-
-
- /* algebra to set the rest of the window alignment vectors; many are
- just derived, but they make the process clearer for the time
- being */
-
-
-
- /* the real analysis begins; forward MDCT with window */
-
-
- /* Noise floor, resolution floor */
+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);
+}
- /* encode the floor into LSP; get the actual floor back for quant */
+#endif
- /* use noise floor, res floor for culling, actual floor for quant */
- /* encode residue */
- /* advance storage vectors and clean up */
- /* center the window leadout on blocksize[1]/4 */
- {
- int new_beginSr,new_endSr,movement,emove;
- /* first do the pcm storage */
- if(v->Sr){
- new_beginSl=0;
- new_endSl=v->blocksize[1]/2;
- }else{
- new_beginSl=v->blocksize[1]/4-v->blocksize[0]/4;
- new_endSl=new_beginSr+v->blocksize[0]/2;
- }
- movement=v->beginSr-new_beginSl;
- for(i=0;i<v->pcm_channels;i++)
- memmove(v->pcm[i],v->pcm[i]+movement,
- (v->pcm_current-movement)*sizeof(double));
- v->pcm_current-=movement;
- v->lW=W;
- v->Sl=v->Sr;
- v->beginSl=new_beginSl;
- v->endSl=new_endSl;
- v->frame++;
- v->samples+=movement;
- /* now advance the multipliers */
- emove=movement/samples_per_envelope_step;
- for(i=0;i<v->envelope_channels;i++){
- memmove(v->deltas[i],v->deltas[i]+emove,
- (v->envelope_current-emove)*sizeof(double));
- memmove(v->multipliers[i],v->multipliers[i]+emove,
- (v->envelope_current-emove)*sizeof(int));
- }
- v->envelope_current-=emove;
- }
- /* done */
- return(1);
-}
projects / platform / upstream / libvorbis.git / blobdiff