9fee0ec4ca
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657
328 lines
9 KiB
Java
328 lines
9 KiB
Java
/*
|
|
* $ProjectName$
|
|
* $ProjectRevision$
|
|
* -----------------------------------------------------------
|
|
* $Id$
|
|
* -----------------------------------------------------------
|
|
*
|
|
* $Author$
|
|
*
|
|
* Description:
|
|
*
|
|
* Copyright 2002-2003 Tor-Einar Jarnbjo
|
|
* -----------------------------------------------------------
|
|
*
|
|
* Change History
|
|
* -----------------------------------------------------------
|
|
* $Log$
|
|
* Revision 1.1 2005/07/11 15:42:36 hcl
|
|
* Songdb java version, source. only 1.5 compatible
|
|
*
|
|
* Revision 1.2 2004/09/21 06:39:06 shred
|
|
* Importe reorganisiert, damit Eclipse Ruhe gibt. ;-)
|
|
*
|
|
* Revision 1.1.1.1 2004/04/04 22:09:12 shred
|
|
* First Import
|
|
*
|
|
* Revision 1.2 2003/03/16 01:11:12 jarnbjo
|
|
* no message
|
|
*
|
|
*
|
|
*/
|
|
|
|
package de.jarnbjo.vorbis;
|
|
|
|
import java.io.IOException;
|
|
|
|
import de.jarnbjo.util.io.BitInputStream;
|
|
|
|
class AudioPacket {
|
|
|
|
private int modeNumber;
|
|
private Mode mode;
|
|
private Mapping mapping;
|
|
private int n; // block size
|
|
private boolean blockFlag, previousWindowFlag, nextWindowFlag;
|
|
|
|
private int windowCenter, leftWindowStart, leftWindowEnd, leftN, rightWindowStart, rightWindowEnd, rightN;
|
|
private float[] window;
|
|
private float[][] pcm;
|
|
private int[][] pcmInt;
|
|
|
|
private Floor[] channelFloors;
|
|
private boolean[] noResidues;
|
|
|
|
private final static float[][] windows=new float[8][];
|
|
|
|
protected AudioPacket(final VorbisStream vorbis, final BitInputStream source) throws VorbisFormatException, IOException {
|
|
|
|
final SetupHeader sHeader=vorbis.getSetupHeader();
|
|
final IdentificationHeader iHeader=vorbis.getIdentificationHeader();
|
|
final Mode[] modes=sHeader.getModes();
|
|
final Mapping[] mappings=sHeader.getMappings();
|
|
final Residue[] residues=sHeader.getResidues();
|
|
final int channels=iHeader.getChannels();
|
|
|
|
if(source.getInt(1)!=0) {
|
|
throw new VorbisFormatException("Packet type mismatch when trying to create an audio packet.");
|
|
}
|
|
|
|
modeNumber=source.getInt(Util.ilog(modes.length-1));
|
|
|
|
try {
|
|
mode=modes[modeNumber];
|
|
}
|
|
catch(ArrayIndexOutOfBoundsException e) {
|
|
throw new VorbisFormatException("Reference to invalid mode in audio packet.");
|
|
}
|
|
|
|
mapping=mappings[mode.getMapping()];
|
|
|
|
final int[] magnitudes=mapping.getMagnitudes();
|
|
final int[] angles=mapping.getAngles();
|
|
|
|
blockFlag=mode.getBlockFlag();
|
|
|
|
final int blockSize0=iHeader.getBlockSize0();
|
|
final int blockSize1=iHeader.getBlockSize1();
|
|
|
|
n=blockFlag?blockSize1:blockSize0;
|
|
|
|
if(blockFlag) {
|
|
previousWindowFlag=source.getBit();
|
|
nextWindowFlag=source.getBit();
|
|
}
|
|
|
|
windowCenter=n/2;
|
|
|
|
if(blockFlag && !previousWindowFlag) {
|
|
leftWindowStart=n/4-blockSize0/4;
|
|
leftWindowEnd=n/4+blockSize0/4;
|
|
leftN=blockSize0/2;
|
|
}
|
|
else {
|
|
leftWindowStart=0;
|
|
leftWindowEnd=n/2;
|
|
leftN=windowCenter;
|
|
}
|
|
|
|
if(blockFlag && !nextWindowFlag) {
|
|
rightWindowStart=n*3/4-blockSize0/4;
|
|
rightWindowEnd=n*3/4+blockSize0/4;
|
|
rightN=blockSize0/2;
|
|
}
|
|
else {
|
|
rightWindowStart=windowCenter;
|
|
rightWindowEnd=n;
|
|
rightN=n/2;
|
|
}
|
|
|
|
window=getComputedWindow();//new double[n];
|
|
|
|
channelFloors=new Floor[channels];
|
|
noResidues=new boolean[channels];
|
|
|
|
pcm=new float[channels][n];
|
|
pcmInt=new int[channels][n];
|
|
|
|
boolean allFloorsEmpty=true;
|
|
|
|
for(int i=0; i<channels; i++) {
|
|
int submapNumber=mapping.getMux()[i];
|
|
int floorNumber=mapping.getSubmapFloors()[submapNumber];
|
|
Floor decodedFloor=sHeader.getFloors()[floorNumber].decodeFloor(vorbis, source);
|
|
channelFloors[i]=decodedFloor;
|
|
noResidues[i]=decodedFloor==null;
|
|
if(decodedFloor!=null) {
|
|
allFloorsEmpty=false;
|
|
}
|
|
}
|
|
|
|
if(allFloorsEmpty) {
|
|
return;
|
|
}
|
|
|
|
for(int i=0; i<magnitudes.length; i++) {
|
|
if(!noResidues[magnitudes[i]] ||
|
|
!noResidues[angles[i]]) {
|
|
|
|
noResidues[magnitudes[i]]=false;
|
|
noResidues[angles[i]]=false;
|
|
}
|
|
}
|
|
|
|
Residue[] decodedResidues=new Residue[mapping.getSubmaps()];
|
|
|
|
for(int i=0; i<mapping.getSubmaps(); i++) {
|
|
int ch=0;
|
|
boolean[] doNotDecodeFlags=new boolean[channels];
|
|
for(int j=0; j<channels; j++) {
|
|
if(mapping.getMux()[j]==i) {
|
|
doNotDecodeFlags[ch++]=noResidues[j];
|
|
}
|
|
}
|
|
int residueNumber=mapping.getSubmapResidues()[i];
|
|
Residue residue=residues[residueNumber];
|
|
|
|
residue.decodeResidue(vorbis, source, mode, ch, doNotDecodeFlags, pcm);
|
|
}
|
|
|
|
|
|
for(int i=mapping.getCouplingSteps()-1; i>=0; i--) {
|
|
double newA=0, newM=0;
|
|
final float[] magnitudeVector=pcm[magnitudes[i]];
|
|
final float[] angleVector=pcm[angles[i]];
|
|
for(int j=0; j<magnitudeVector.length; j++) {
|
|
float a=angleVector[j];
|
|
float m=magnitudeVector[j];
|
|
if(a>0) {
|
|
//magnitudeVector[j]=m;
|
|
angleVector[j]=m>0?m-a:m+a;
|
|
}
|
|
else {
|
|
magnitudeVector[j]=m>0?m+a:m-a;
|
|
angleVector[j]=m;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(int i=0; i<channels; i++) {
|
|
if(channelFloors[i]!=null) {
|
|
channelFloors[i].computeFloor(pcm[i]);
|
|
}
|
|
}
|
|
|
|
// perform an inverse mdct to all channels
|
|
|
|
for(int i=0; i<channels; i++) {
|
|
MdctFloat mdct=blockFlag?iHeader.getMdct1():iHeader.getMdct0();
|
|
mdct.imdct(pcm[i], window, pcmInt[i]);
|
|
}
|
|
|
|
}
|
|
|
|
private float[] getComputedWindow() {
|
|
int ix=(blockFlag?4:0)+(previousWindowFlag?2:0)+(nextWindowFlag?1:0);
|
|
float[] w=windows[ix];
|
|
if(w==null) {
|
|
w=new float[n];
|
|
|
|
for(int i=0;i<leftN;i++){
|
|
float x=(float)((i+.5)/leftN*Math.PI/2.);
|
|
x=(float)Math.sin(x);
|
|
x*=x;
|
|
x*=(float)Math.PI/2.;
|
|
x=(float)Math.sin(x);
|
|
w[i+leftWindowStart]=x;
|
|
}
|
|
|
|
for(int i=leftWindowEnd; i<rightWindowStart; w[i++]=1.0f);
|
|
|
|
for(int i=0;i<rightN;i++){
|
|
float x=(float)((rightN-i-.5)/rightN*Math.PI/2.);
|
|
x=(float)Math.sin(x);
|
|
x*=x;
|
|
x*=(float)Math.PI/2.;
|
|
x=(float)Math.sin(x);
|
|
w[i+rightWindowStart]=x;
|
|
}
|
|
|
|
windows[ix]=w;
|
|
}
|
|
return w;
|
|
}
|
|
|
|
protected int getNumberOfSamples() {
|
|
return rightWindowStart-leftWindowStart;
|
|
}
|
|
|
|
protected int getPcm(final AudioPacket previousPacket, final int[][] buffer) {
|
|
int channels=pcm.length;
|
|
int val;
|
|
|
|
// copy left window flank and mix with right window flank from
|
|
// the previous audio packet
|
|
for(int i=0; i<channels; i++) {
|
|
int j1=0, j2=previousPacket.rightWindowStart;
|
|
final int[] ppcm=previousPacket.pcmInt[i];
|
|
final int[] tpcm=pcmInt[i];
|
|
final int[] target=buffer[i];
|
|
|
|
for(int j=leftWindowStart; j<leftWindowEnd; j++) {
|
|
val=ppcm[j2++]+tpcm[j];
|
|
if(val>32767) val=32767;
|
|
if(val<-32768) val=-32768;
|
|
target[j1++]=val;
|
|
}
|
|
}
|
|
|
|
// use System.arraycopy to copy the middle part (if any)
|
|
// of the window
|
|
if(leftWindowEnd+1<rightWindowStart) {
|
|
for(int i=0; i<channels; i++) {
|
|
System.arraycopy(pcmInt[i], leftWindowEnd, buffer[i], leftWindowEnd-leftWindowStart, rightWindowStart-leftWindowEnd);
|
|
}
|
|
}
|
|
|
|
return rightWindowStart-leftWindowStart;
|
|
}
|
|
|
|
protected void getPcm(final AudioPacket previousPacket, final byte[] buffer) {
|
|
int channels=pcm.length;
|
|
int val;
|
|
|
|
// copy left window flank and mix with right window flank from
|
|
// the previous audio packet
|
|
for(int i=0; i<channels; i++) {
|
|
int ix=0, j2=previousPacket.rightWindowStart;
|
|
final int[] ppcm=previousPacket.pcmInt[i];
|
|
final int[] tpcm=pcmInt[i];
|
|
for(int j=leftWindowStart; j<leftWindowEnd; j++) {
|
|
val=ppcm[j2++]+tpcm[j];
|
|
if(val>32767) val=32767;
|
|
if(val<-32768) val=-32768;
|
|
buffer[ix+(i*2)+1]=(byte)(val&0xff);
|
|
buffer[ix+(i*2)]=(byte)((val>>8)&0xff);
|
|
ix+=channels*2;
|
|
}
|
|
|
|
ix=(leftWindowEnd-leftWindowStart)*channels*2;
|
|
for(int j=leftWindowEnd; j<rightWindowStart; j++) {
|
|
val=tpcm[j];
|
|
if(val>32767) val=32767;
|
|
if(val<-32768) val=-32768;
|
|
buffer[ix+(i*2)+1]=(byte)(val&0xff);
|
|
buffer[ix+(i*2)]=(byte)((val>>8)&0xff);
|
|
ix+=channels*2;
|
|
}
|
|
}
|
|
}
|
|
|
|
protected float[] getWindow() {
|
|
return window;
|
|
}
|
|
|
|
protected int getLeftWindowStart() {
|
|
return leftWindowStart;
|
|
}
|
|
|
|
protected int getLeftWindowEnd() {
|
|
return leftWindowEnd;
|
|
}
|
|
|
|
protected int getRightWindowStart() {
|
|
return rightWindowStart;
|
|
}
|
|
|
|
protected int getRightWindowEnd() {
|
|
return rightWindowEnd;
|
|
}
|
|
|
|
public int[][] getPcm() {
|
|
return pcmInt;
|
|
}
|
|
|
|
public float[][] getFreqencyDomain() {
|
|
return pcm;
|
|
}
|
|
}
|