/*
* Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.media.sound;
import java.io.IOException;
import java.util.Arrays;
import javax.sound.midi.MidiChannel;
import javax.sound.midi.VoiceStatus;
/**
* Abstract resampler class.
*
* @author Karl Helgason
*/
public abstract class SoftAbstractResampler implements SoftResampler {
private class ModelAbstractResamplerStream implements SoftResamplerStreamer {
AudioFloatInputStream stream;
boolean stream_eof = false;
int loopmode;
boolean loopdirection = true; // true = forward
float loopstart;
float looplen;
float target_pitch;
float[] current_pitch = new float[1];
boolean started;
boolean eof;
int sector_pos = 0;
int sector_size = 400;
int sector_loopstart = -1;
boolean markset = false;
int marklimit = 0;
int streampos = 0;
int nrofchannels = 2;
boolean noteOff_flag = false;
float[][] ibuffer;
boolean ibuffer_order = true;
float[] sbuffer;
int pad;
int pad2;
float[] ix = new float[1];
int[] ox = new int[1];
float samplerateconv = 1;
float pitchcorrection = 0;
public ModelAbstractResamplerStream() {
pad = getPadding();
pad2 = getPadding() * 2;
ibuffer = new float[2][sector_size + pad2];
ibuffer_order = true;
}
public void noteOn(MidiChannel channel, VoiceStatus voice,
int noteNumber, int velocity) {
}
public void noteOff(int velocity) {
noteOff_flag = true;
}
public void open(ModelWavetable osc, float outputsamplerate)
throws IOException {
eof = false;
nrofchannels = osc.getChannels();
if (ibuffer.length < nrofchannels) {
ibuffer = new float[nrofchannels][sector_size + pad2];
}
stream = osc.openStream();
streampos = 0;
stream_eof = false;
pitchcorrection = osc.getPitchcorrection();
samplerateconv
= stream.getFormat().getSampleRate() / outputsamplerate;
looplen = osc.getLoopLength();
loopstart = osc.getLoopStart();
sector_loopstart = (int) (loopstart / sector_size);
sector_loopstart = sector_loopstart - 1;
sector_pos = 0;
if (sector_loopstart < 0)
sector_loopstart = 0;
started = false;
loopmode = osc.getLoopType();
if (loopmode != 0) {
markset = false;
marklimit = nrofchannels * (int) (looplen + pad2 + 1);
} else
markset = true;
// loopmode = 0;
target_pitch = samplerateconv;
current_pitch[0] = samplerateconv;
ibuffer_order = true;
loopdirection = true;
noteOff_flag = false;
for (int i = 0; i < nrofchannels; i++)
Arrays.fill(ibuffer[i], sector_size, sector_size + pad2, 0);
ix[0] = pad;
eof = false;
ix[0] = sector_size + pad;
sector_pos = -1;
streampos = -sector_size;
nextBuffer();
}
public void setPitch(float pitch) {
/*
this.pitch = (float) Math.pow(2f,
(pitchcorrection + pitch) / 1200.0f)
* samplerateconv;
*/
this.target_pitch = (float)Math.exp(
(pitchcorrection + pitch) * (Math.log(2.0) / 1200.0))
* samplerateconv;
if (!started)
current_pitch[0] = this.target_pitch;
}
public void nextBuffer() throws IOException {
if (ix[0] < pad) {
if (markset) {
// reset to target sector
stream.reset();
ix[0] += streampos - (sector_loopstart * sector_size);
sector_pos = sector_loopstart;
streampos = sector_pos * sector_size;
// and go one sector backward
ix[0] += sector_size;
sector_pos -= 1;
streampos -= sector_size;
stream_eof = false;
}
}
if (ix[0] >= sector_size + pad) {
if (stream_eof) {
eof = true;
return;
}
}
if (ix[0] >= sector_size * 4 + pad) {
int skips = (int)((ix[0] - sector_size * 4 + pad) / sector_size);
ix[0] -= sector_size * skips;
sector_pos += skips;
streampos += sector_size * skips;
stream.skip(sector_size * skips);
}
while (ix[0] >= sector_size + pad) {
if (!markset) {
if (sector_pos + 1 == sector_loopstart) {
stream.mark(marklimit);
markset = true;
}
}
ix[0] -= sector_size;
sector_pos++;
streampos += sector_size;
for (int c = 0; c < nrofchannels; c++) {
float[] cbuffer = ibuffer[c];
for (int i = 0; i < pad2; i++)
cbuffer[i] = cbuffer[i + sector_size];
}
int ret;
if (nrofchannels == 1)
ret = stream.read(ibuffer[0], pad2, sector_size);
else {
int slen = sector_size * nrofchannels;
if (sbuffer == null || sbuffer.length < slen)
sbuffer = new float[slen];
int sret = stream.read(sbuffer, 0, slen);
if (sret == -1)
ret = -1;
else {
ret = sret / nrofchannels;
for (int i = 0; i < nrofchannels; i++) {
float[] buff = ibuffer[i];
int ix = i;
int ix_step = nrofchannels;
int ox = pad2;
for (int j = 0; j < ret; j++, ix += ix_step, ox++)
buff[ox] = sbuffer[ix];
}
}
}
if (ret == -1) {
ret = 0;
stream_eof = true;
for (int i = 0; i < nrofchannels; i++)
Arrays.fill(ibuffer[i], pad2, pad2 + sector_size, 0f);
return;
}
if (ret != sector_size) {
for (int i = 0; i < nrofchannels; i++)
Arrays.fill(ibuffer[i], pad2 + ret, pad2 + sector_size, 0f);
}
ibuffer_order = true;
}
}
public void reverseBuffers() {
ibuffer_order = !ibuffer_order;
for (int c = 0; c < nrofchannels; c++) {
float[] cbuff = ibuffer[c];
int len = cbuff.length - 1;
int len2 = cbuff.length / 2;
for (int i = 0; i < len2; i++) {
float x = cbuff[i];
cbuff[i] = cbuff[len - i];
cbuff[len - i] = x;
}
}
}
public int read(float[][] buffer, int offset, int len)
throws IOException {
if (eof)
return -1;
if (noteOff_flag)
if ((loopmode & 2) != 0)
if (loopdirection)
loopmode = 0;
float pitchstep = (target_pitch - current_pitch[0]) / len;
float[] current_pitch = this.current_pitch;
started = true;
int[] ox = this.ox;
ox[0] = offset;
int ox_end = len + offset;
float ixend = sector_size + pad;
if (!loopdirection)
ixend = pad;
while (ox[0] != ox_end) {
nextBuffer();
if (!loopdirection) {
// If we are in backward playing part of pingpong
// or reverse loop
if (streampos < (loopstart + pad)) {
ixend = loopstart - streampos + pad2;
if (ix[0] <= ixend) {
if ((loopmode & 4) != 0) {
// Ping pong loop, change loopdirection
loopdirection = true;
ixend = sector_size + pad;
continue;
}
ix[0] += looplen;
ixend = pad;
continue;
}
}
if (ibuffer_order != loopdirection)
reverseBuffers();
ix[0] = (sector_size + pad2) - ix[0];
ixend = (sector_size + pad2) - ixend;
ixend++;
float bak_ix = ix[0];
int bak_ox = ox[0];
float bak_pitch = current_pitch[0];
for (int i = 0; i < nrofchannels; i++) {
if (buffer[i] != null) {
ix[0] = bak_ix;
ox[0] = bak_ox;
current_pitch[0] = bak_pitch;
interpolate(ibuffer[i], ix, ixend, current_pitch,
pitchstep, buffer[i], ox, ox_end);
}
}
ix[0] = (sector_size + pad2) - ix[0];
ixend--;
ixend = (sector_size + pad2) - ixend;
if (eof) {
current_pitch[0] = this.target_pitch;
return ox[0] - offset;
}
continue;
}
if (loopmode != 0) {
if (streampos + sector_size > (looplen + loopstart + pad)) {
ixend = loopstart + looplen - streampos + pad2;
if (ix[0] >= ixend) {
if ((loopmode & 4) != 0 || (loopmode & 8) != 0) {
// Ping pong or revese loop, change loopdirection
loopdirection = false;
ixend = pad;
continue;
}
ixend = sector_size + pad;
ix[0] -= looplen;
continue;
}
}
}
if (ibuffer_order != loopdirection)
reverseBuffers();
float bak_ix = ix[0];
int bak_ox = ox[0];
float bak_pitch = current_pitch[0];
for (int i = 0; i < nrofchannels; i++) {
if (buffer[i] != null) {
ix[0] = bak_ix;
ox[0] = bak_ox;
current_pitch[0] = bak_pitch;
interpolate(ibuffer[i], ix, ixend, current_pitch,
pitchstep, buffer[i], ox, ox_end);
}
}
if (eof) {
current_pitch[0] = this.target_pitch;
return ox[0] - offset;
}
}
current_pitch[0] = this.target_pitch;
return len;
}
public void close() throws IOException {
stream.close();
}
}
public abstract int getPadding();
public abstract void interpolate(float[] in, float[] in_offset,
float in_end, float[] pitch, float pitchstep, float[] out,
int[] out_offset, int out_end);
public SoftResamplerStreamer openStreamer() {
return new ModelAbstractResamplerStream();
}
}