media/libtremor/lib/tremor_mapping0.c
author Gregory Szorc <gps@mozilla.com>
Thu, 19 Feb 2015 10:58:41 -0800
changeset 245738 c97c977c92b97c9585011651b13a088f0cd4ed4f
parent 56070 d3fac77dac2683da42207db50e16484512a137d4
permissions -rw-r--r--
Bug 1132771 - moz.build fixups to enable execution in no config mode Various moz.build files fail to execute when a build config is not present. Many of these are due to assuming certain CONFIG entries are present. This patch attempts to fix that and enable every moz.build to be read without a build config.

/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' 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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
 *                                                                  *
 ********************************************************************

 function: channel mapping 0 implementation

 ********************************************************************/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <ogg/ogg.h>
#include "ivorbiscodec.h"
#include "mdct.h"
#include "codec_internal.h"
#include "codebook.h"
#include "window.h"
#include "registry.h"
#include "misc.h"

/* simplistic, wasteful way of doing this (unique lookup for each
   mode/submapping); there should be a central repository for
   identical lookups.  That will require minor work, so I'm putting it
   off as low priority.

   Why a lookup for each backend in a given mode?  Because the
   blocksize is set by the mode, and low backend lookups may require
   parameters from other areas of the mode/mapping */

typedef struct {
  vorbis_info_mode *mode;
  vorbis_info_mapping0 *map;

  vorbis_look_floor **floor_look;

  vorbis_look_residue **residue_look;

  vorbis_func_floor **floor_func;
  vorbis_func_residue **residue_func;

  int ch;
  long lastframe; /* if a different mode is called, we need to 
		     invalidate decay */
} vorbis_look_mapping0;

static void mapping0_free_info(vorbis_info_mapping *i){
  vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)i;
  if(info){
    memset(info,0,sizeof(*info));
    _ogg_free(info);
  }
}

static void mapping0_free_look(vorbis_look_mapping *look){
  int i;
  vorbis_look_mapping0 *l=(vorbis_look_mapping0 *)look;
  if(l){

    for(i=0;i<l->map->submaps;i++){
      l->floor_func[i]->free_look(l->floor_look[i]);
      l->residue_func[i]->free_look(l->residue_look[i]);
    }

    _ogg_free(l->floor_func);
    _ogg_free(l->residue_func);
    _ogg_free(l->floor_look);
    _ogg_free(l->residue_look);
    memset(l,0,sizeof(*l));
    _ogg_free(l);
  }
}

static vorbis_look_mapping *mapping0_look(vorbis_dsp_state *vd,vorbis_info_mode *vm,
			  vorbis_info_mapping *m){
  int i;
  vorbis_info          *vi=vd->vi;
  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
  vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)_ogg_calloc(1,sizeof(*look));
  vorbis_info_mapping0 *info=look->map=(vorbis_info_mapping0 *)m;
  look->mode=vm;
  
  look->floor_look=(vorbis_look_floor **)_ogg_calloc(info->submaps,sizeof(*look->floor_look));

  look->residue_look=(vorbis_look_residue **)_ogg_calloc(info->submaps,sizeof(*look->residue_look));

  look->floor_func=(vorbis_func_floor **)_ogg_calloc(info->submaps,sizeof(*look->floor_func));
  look->residue_func=(vorbis_func_residue **)_ogg_calloc(info->submaps,sizeof(*look->residue_func));
  
  for(i=0;i<info->submaps;i++){
    int floornum=info->floorsubmap[i];
    int resnum=info->residuesubmap[i];

    look->floor_func[i]=_floor_P[ci->floor_type[floornum]];
    look->floor_look[i]=look->floor_func[i]->
      look(vd,vm,ci->floor_param[floornum]);
    look->residue_func[i]=_residue_P[ci->residue_type[resnum]];
    look->residue_look[i]=look->residue_func[i]->
      look(vd,vm,ci->residue_param[resnum]);
    
  }

  look->ch=vi->channels;

  return(look);
}

static int ilog(unsigned int v){
  int ret=0;
  if(v)--v;
  while(v){
    ret++;
    v>>=1;
  }
  return(ret);
}

/* also responsible for range checking */
static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb){
  int i,b;
  vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)_ogg_calloc(1,sizeof(*info));
  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
  memset(info,0,sizeof(*info));

  b=oggpack_read(opb,1);
  if(b<0)goto err_out;
  if(b){
    info->submaps=oggpack_read(opb,4)+1;
    if(info->submaps<=0)goto err_out;
  }else
    info->submaps=1;

  b=oggpack_read(opb,1);
  if(b<0)goto err_out;
  if(b){
    info->coupling_steps=oggpack_read(opb,8)+1;
    if(info->coupling_steps<=0)goto err_out;
    for(i=0;i<info->coupling_steps;i++){
      int testM=info->coupling_mag[i]=oggpack_read(opb,ilog(vi->channels));
      int testA=info->coupling_ang[i]=oggpack_read(opb,ilog(vi->channels));

      if(testM<0 || 
	 testA<0 || 
	 testM==testA || 
	 testM>=vi->channels ||
	 testA>=vi->channels) goto err_out;
    }

  }

  if(oggpack_read(opb,2)!=0)goto err_out; /* 2,3:reserved */
    
  if(info->submaps>1){
    for(i=0;i<vi->channels;i++){
      info->chmuxlist[i]=oggpack_read(opb,4);
      if(info->chmuxlist[i]>=info->submaps || info->chmuxlist[i]<0)goto err_out;
    }
  }
  for(i=0;i<info->submaps;i++){
    int temp=oggpack_read(opb,8);
    if(temp>=ci->times)goto err_out;
    info->floorsubmap[i]=oggpack_read(opb,8);
    if(info->floorsubmap[i]>=ci->floors || info->floorsubmap[i]<0)goto err_out;
    info->residuesubmap[i]=oggpack_read(opb,8);
    if(info->residuesubmap[i]>=ci->residues || info->residuesubmap[i]<0)
      goto err_out;
  }

  return info;

 err_out:
  mapping0_free_info(info);
  return(NULL);
}

static int seq=0;
static int mapping0_inverse(vorbis_block *vb,vorbis_look_mapping *l){
  vorbis_dsp_state     *vd=vb->vd;
  vorbis_info          *vi=vd->vi;
  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
  private_state        *b=(private_state *)vd->backend_state;
  vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)l;
  vorbis_info_mapping0 *info=look->map;

  int                   i,j;
  long                  n=vb->pcmend=ci->blocksizes[vb->W];

  ogg_int32_t **pcmbundle=(ogg_int32_t **)alloca(sizeof(*pcmbundle)*vi->channels);
  int    *zerobundle=(int *)alloca(sizeof(*zerobundle)*vi->channels);
  
  int   *nonzero  =(int *)alloca(sizeof(*nonzero)*vi->channels);
  void **floormemo=(void **)alloca(sizeof(*floormemo)*vi->channels);
  
  /* time domain information decode (note that applying the
     information would have to happen later; we'll probably add a
     function entry to the harness for that later */
  /* NOT IMPLEMENTED */

  /* recover the spectral envelope; store it in the PCM vector for now */
  for(i=0;i<vi->channels;i++){
    int submap=info->chmuxlist[i];
    floormemo[i]=look->floor_func[submap]->
      inverse1(vb,look->floor_look[submap]);
    if(floormemo[i])
      nonzero[i]=1;
    else
      nonzero[i]=0;      
    memset(vb->pcm[i],0,sizeof(*vb->pcm[i])*n/2);
  }

  /* channel coupling can 'dirty' the nonzero listing */
  for(i=0;i<info->coupling_steps;i++){
    if(nonzero[info->coupling_mag[i]] ||
       nonzero[info->coupling_ang[i]]){
      nonzero[info->coupling_mag[i]]=1; 
      nonzero[info->coupling_ang[i]]=1; 
    }
  }

  /* recover the residue into our working vectors */
  for(i=0;i<info->submaps;i++){
    int ch_in_bundle=0;
    for(j=0;j<vi->channels;j++){
      if(info->chmuxlist[j]==i){
	if(nonzero[j])
	  zerobundle[ch_in_bundle]=1;
	else
	  zerobundle[ch_in_bundle]=0;
	pcmbundle[ch_in_bundle++]=vb->pcm[j];
      }
    }
    
    look->residue_func[i]->inverse(vb,look->residue_look[i],
				   pcmbundle,zerobundle,ch_in_bundle);
  }

  //for(j=0;j<vi->channels;j++)
  //_analysis_output("coupled",seq+j,vb->pcm[j],-8,n/2,0,0);


  /* channel coupling */
  for(i=info->coupling_steps-1;i>=0;i--){
    ogg_int32_t *pcmM=vb->pcm[info->coupling_mag[i]];
    ogg_int32_t *pcmA=vb->pcm[info->coupling_ang[i]];
    
    for(j=0;j<n/2;j++){
      ogg_int32_t mag=pcmM[j];
      ogg_int32_t ang=pcmA[j];
      
      if(mag>0)
	if(ang>0){
	  pcmM[j]=mag;
	  pcmA[j]=mag-ang;
	}else{
	  pcmA[j]=mag;
	  pcmM[j]=mag+ang;
	}
      else
	if(ang>0){
	  pcmM[j]=mag;
	  pcmA[j]=mag+ang;
	}else{
	  pcmA[j]=mag;
	  pcmM[j]=mag-ang;
	}
    }
  }

  //for(j=0;j<vi->channels;j++)
  //_analysis_output("residue",seq+j,vb->pcm[j],-8,n/2,0,0);

  /* compute and apply spectral envelope */
  for(i=0;i<vi->channels;i++){
    ogg_int32_t *pcm=vb->pcm[i];
    int submap=info->chmuxlist[i];
    look->floor_func[submap]->
      inverse2(vb,look->floor_look[submap],floormemo[i],pcm);
  }

  //for(j=0;j<vi->channels;j++)
  //_analysis_output("mdct",seq+j,vb->pcm[j],-24,n/2,0,1);

  /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
  /* only MDCT right now.... */
  for(i=0;i<vi->channels;i++){
    ogg_int32_t *pcm=vb->pcm[i];
    mdct_backward(n,pcm,pcm);
  }

  //for(j=0;j<vi->channels;j++)
  //_analysis_output("imdct",seq+j,vb->pcm[j],-24,n,0,0);

  /* window the data */
  for(i=0;i<vi->channels;i++){
    ogg_int32_t *pcm=vb->pcm[i];
    if(nonzero[i])
      _vorbis_apply_window(pcm,b->window,ci->blocksizes,vb->lW,vb->W,vb->nW);
    else
      for(j=0;j<n;j++)
	pcm[j]=0;
    
  }

  //for(j=0;j<vi->channels;j++)
  //_analysis_output("window",seq+j,vb->pcm[j],-24,n,0,0);

  seq+=vi->channels;
  /* all done! */
  return(0);
}

/* export hooks */
vorbis_func_mapping mapping0_exportbundle={
  &mapping0_unpack,
  &mapping0_look,
  &mapping0_free_info,
  &mapping0_free_look,
  &mapping0_inverse
};