MajenkoProjects/AudiobookRecorder
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Added adjustable FFT block size

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This commit is contained in:
Matt Jenkins
2019-09-07 21:24:46 +01:00
parent d619fb2f4d
commit 671f2b9270
3 changed files with 35 additions and 15 deletions
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1
src/uk/co/majenko/audiobookrecorder/MainToolBar.java
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@@ -165,6 +165,7 @@ public class MainToolBar extends JToolBar {
"1.50x",
"1.75x"
});
playbackSpeed.setFocusable(false);
playbackSpeed.setSelectedIndex(1);
add(playbackSpeed);

17
src/uk/co/majenko/audiobookrecorder/Options.java
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@@ -24,6 +24,7 @@ public class Options extends JDialog {
JComboBox<KVPair> rateList;
JComboBox<KVPair> bitDepth;
JComboBox<KVPair> trimMethod;
JComboBox<KVPair> fftBlockSize;
JTextField storageFolder;
JTextField archiveFolder;
JSpinner preChapterGap;
@@ -297,6 +298,7 @@ public class Options extends JDialog {
bitDepth = addDropdown(optionsPanel, "Sample resolution:", getResolutionList(), get("audio.recording.resolution"));
trimMethod = addDropdown(optionsPanel, "Auto-trim method:", getTrimMethods(), get("audio.recording.trim"));
fftThreshold = addSpinner(optionsPanel, "FFT threshold:", 0, 100, 1, getInteger("audio.recording.trim.fft"), "");
fftBlockSize = addDropdown(optionsPanel, "FFT Block size:", getFFTBlockSizes(), get("audio.recording.trim.blocksize"));
addSeparator(optionsPanel);
@@ -565,6 +567,7 @@ public class Options extends JDialog {
} else {
defaultPrefs.put("audio.playback.device", "");
}
defaultPrefs.put("audio.recording.trim.blocksize", "4096");
defaultPrefs.put("catenation.pre-chapter", "1000");
defaultPrefs.put("catenation.post-chapter", "1500");
@@ -708,6 +711,7 @@ public class Options extends JDialog {
set("editor.external", externalEditor.getText());
set("cache.size", cacheSize.getValue());
set("audio.recording.trim.fft", fftThreshold.getValue());
set("audio.recording.trim.blocksize", ((KVPair)fftBlockSize.getSelectedItem()).key);
set("effects.ethereal.offset", etherealOffset.getValue());
set("effects.ethereal.iterations", etherealIterations.getValue());
@@ -782,6 +786,19 @@ public class Options extends JDialog {
return pairs;
}
public static KVPair[] getFFTBlockSizes() {
KVPair[] pairs = new KVPair[8];
pairs[0] = new KVPair<String, String>("1024", "1024");
pairs[1] = new KVPair<String, String>("2048", "2048");
pairs[2] = new KVPair<String, String>("4096", "4096");
pairs[3] = new KVPair<String, String>("8192", "8192");
pairs[4] = new KVPair<String, String>("16384", "16384");
pairs[5] = new KVPair<String, String>("32768", "32768");
pairs[6] = new KVPair<String, String>("65536", "65537");
pairs[7] = new KVPair<String, String>("131072", "131072");
return pairs;
}
public static void createEffectChains() {
effectChains = new ArrayList<EffectGroup>();

32
src/uk/co/majenko/audiobookrecorder/Sentence.java
View File

@@ -31,7 +31,7 @@ import java.util.Timer;
public class Sentence extends DefaultMutableTreeNode implements Cacheable {
String text;
String id;
int postGap;
@@ -225,17 +225,18 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
return;
}
int fftSize = Options.getInteger("audio.recording.trim.blocksize");
int blocks = samples.length / 4096 + 1;
int blocks = samples.length / fftSize + 1;
int[] intens = new int[blocks];
int block = 0;
for (int i = 0; i < samples.length; i+= 4096) {
double[] real = new double[4096];
double[] imag = new double[4096];
for (int i = 0; i < samples.length; i+= fftSize) {
double[] real = new double[fftSize];
double[] imag = new double[fftSize];
for (int j = 0; j < 4096; j++) {
for (int j = 0; j < fftSize; j++) {
if (i + j < samples.length) {
real[j] = (samples[i+j][LEFT] + samples[i+j][RIGHT]) / 2d;
imag[j] = 0;
@@ -247,14 +248,14 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
double[] buckets = FFT.fft(real, imag, true);
double av = 0;
for (int j = 1; j < 2048; j++) {
for (int j = 1; j < fftSize/2; j++) {
av += Math.abs(buckets[j]);
}
av /= 2047d;
av /= (fftSize / 2);
intens[block] = 0;
for (int j = 2; j < 4096; j += 2) {
for (int j = 2; j < fftSize; j += 2) {
double d = Math.abs(av - buckets[j]);
if (d > 0.05) {
intens[block]++;
@@ -278,7 +279,7 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
start = 0;
}
startOffset = start * 4096;
startOffset = start * fftSize;
if (startOffset < 0) startOffset = 0;
if (startOffset >= samples.length) startOffset = samples.length;
@@ -295,9 +296,9 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
end = blocks - 1;
}
endOffset = end * 4096;
endOffset = (end+1) * fftSize;
if (endOffset <= startOffset) endOffset = startOffset + 4096;
if (endOffset <= startOffset) endOffset = startOffset + fftSize;
if (endOffset < 0) endOffset = 0;
if (endOffset >= samples.length) endOffset = samples.length;
updateCrossings(useRaw);
@@ -337,7 +338,8 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
startOffset = 0;
}
startOffset -= 4096;
int fftSize = Options.getInteger("audio.recording.trim.blocksize");
startOffset -= fftSize;
for (int i = samples.length-1; i >= 0; i--) {
endOffset = i;
@@ -348,9 +350,9 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
}
}
endOffset += 4096;
endOffset += fftSize;
if (endOffset <= startOffset) endOffset = startOffset + 4096;
if (endOffset <= startOffset) endOffset = startOffset + fftSize;
if (endOffset <= 0) {
endOffset = samples.length-1;
}