| Methods Summary |
|---|
| private void | createSampleArrayCollection()
try {
audioInputStream.mark(Integer.MAX_VALUE);
audioInputStream.reset();
byte[] bytes = new byte[(int) (audioInputStream.getFrameLength()) * ((int) audioInputStream.getFormat().getFrameSize())];
int result = 0;
try {
result = audioInputStream.read(bytes);
} catch (Exception e) {
e.printStackTrace();
}
//convert sample bytes to channel separated 16 bit samples
samplesContainer = getSampleArray(bytes);
//find biggest sample. used for interpolating the yScaleFactor
if (sampleMax > sampleMin) {
biggestSample = sampleMax;
} else {
biggestSample = Math.abs(((double) sampleMin));
}
} catch (Exception e) {
e.printStackTrace();
}
|
| public int[] | getAudio(int channel)
return samplesContainer[channel];
|
| protected int | getIncrement(double xScale)
try {
int increment = (int) (samplesContainer[0].length / (samplesContainer[0].length * xScale));
return increment;
} catch (Exception e) {
e.printStackTrace();
}
return -1;
|
| public int | getNumberOfChannels()
int numBytesPerSample = audioInputStream.getFormat().getSampleSizeInBits() / NUM_BITS_PER_BYTE;
return audioInputStream.getFormat().getFrameSize() / numBytesPerSample;
|
| protected int[][] | getSampleArray(byte[] eightBitByteArray)
int[][] toReturn = new int[getNumberOfChannels()][eightBitByteArray.length / (2 * getNumberOfChannels())];
int index = 0;
//loop through the byte[]
for (int t = 0; t < eightBitByteArray.length;) {
//for each iteration, loop through the channels
for (int a = 0; a < getNumberOfChannels(); a++) {
//do the byte to sample conversion
//see AmplitudeEditor for more info
int low = (int) eightBitByteArray[t];
t++;
int high = (int) eightBitByteArray[t];
t++;
int sample = (high << 8) + (low & 0x00ff);
if (sample < sampleMin) {
sampleMin = sample;
} else if (sample > sampleMax) {
sampleMax = sample;
}
//set the value.
toReturn[a][index] = sample;
}
index++;
}
return toReturn;
|
| public double | getXScaleFactor(int panelWidth)
return (panelWidth / ((double) samplesContainer[0].length));
|
| public double | getYScaleFactor(int panelHeight)
return (panelHeight / (biggestSample * 2 * 1.2));
|
