public void redraw() {
// update the title of the GUI
if (getCustomTitle() == null) {
int id = manager.getWindowIndex(this);
if (id != 0) setTitle(getTitle() + " (view " + (id + 1) + ")");
else setTitle(getTitle());
}
stepPanZoomAnimation();
synchronized (imgLock) {
// redraw the scene
manager.preRedraw(this);
manager.redraw(this);
// copy the image buffer into the JLabel on the JFrame
Graphics cg = lblCanvas.getGraphics();
if (cg != null) cg.drawImage(img, 0, 0, null);
// save a screenshot if one was requested
if (saveScreenshotName != null) {
try {
ImageIO.write(img, "png", new java.io.File(saveScreenshotName));
} catch (java.io.IOException e) {
DialogHelper.displayError("Screenshot could not be saved: " + e);
}
saveScreenshotName = null;
}
}
}
/**
* Attempts to autoconfigure current Context's sample rate, buffer size, or buffer size adjuster .
* Will show a pop-up warning if configuration failed to initialize an AudioRecord instance.
*
* @param context Context which we are attempting to configure
*/
public static void configureRecorder(Context context) {
AudioRecord rec = null;
int sampleRate = PreferenceHelper.getSampleRate(context);
int bufferSize = PreferenceHelper.getBufferSize(context);
int bufferSizeAdjuster = PreferenceHelper.getBufferSizeAdjuster(context);
if (sampleRate < 0 || bufferSize < 0 || bufferSizeAdjuster < 0) {
if (AudioHelper.isSamsungGalaxyS()) {
// bypass checking, go with defaults
bufferSize = 6144;
bufferSizeAdjuster = 1;
sampleRate = Constants.SAMPLE_RATE_22KHZ;
Log.i(
TAG_AUDIOHELPER,
String.format(
"AudioRecord initially configured! sample rate: %d, buffer size: %d, buffer size adjuster: %d",
sampleRate, bufferSize, bufferSizeAdjuster));
PreferenceHelper.setSampleRate(context, sampleRate);
PreferenceHelper.setBufferSize(context, bufferSize);
PreferenceHelper.setBufferSizeAdjuster(context, bufferSizeAdjuster);
return;
}
if (bufferSizeAdjuster < 1) {
// clamp buffer size adjuster to minimum of 1
bufferSizeAdjuster = 1;
}
// try a new sample rates until we find one that works
do {
switch (sampleRate) {
case -1:
// set the default to 22050Hz, so slower devices perform
// better
sampleRate = Constants.SAMPLE_RATE_22KHZ;
break;
case Constants.SAMPLE_RATE_44KHZ:
sampleRate = Constants.SAMPLE_RATE_22KHZ;
break;
case Constants.SAMPLE_RATE_22KHZ:
sampleRate = Constants.SAMPLE_RATE_11KHZ;
break;
case Constants.SAMPLE_RATE_11KHZ:
sampleRate = Constants.SAMPLE_RATE_8KHZ;
break;
default:
// start the loop over again with a larger buffer size
bufferSizeAdjuster *= 2;
sampleRate = Constants.SAMPLE_RATE_22KHZ;
}
bufferSize =
AudioRecord.getMinBufferSize(
sampleRate, Constants.DEFAULT_CHANNEL_CONFIG, Constants.DEFAULT_PCM_FORMAT);
if (bufferSize != AudioRecord.ERROR && bufferSize != AudioRecord.ERROR_BAD_VALUE) {
if (bufferSize <= 4096) {
bufferSize = 4096 * 3 / 2;
}
rec =
new AudioRecord(
AudioSource.MIC,
sampleRate,
Constants.DEFAULT_CHANNEL_CONFIG,
Constants.DEFAULT_PCM_FORMAT,
bufferSize * bufferSizeAdjuster);
if (rec != null && rec.getState() == AudioRecord.STATE_INITIALIZED) {
rec.release();
rec = null;
Log.i(
TAG_AUDIOHELPER,
String.format(
"AudioRecord initially configured! sample rate: %d, buffer size: %d, buffer size adjuster: %d",
sampleRate, bufferSize, bufferSizeAdjuster));
PreferenceHelper.setSampleRate(context, sampleRate);
PreferenceHelper.setBufferSize(context, bufferSize);
PreferenceHelper.setBufferSizeAdjuster(context, bufferSizeAdjuster);
return;
}
if (rec != null) {
rec.release();
rec = null;
}
}
} while (bufferSizeAdjuster < Constants.DEFAULT_BUFFER_LIMIT);
// failure to configure!
DialogHelper.showWarning(
context,
R.string.unable_to_configure_audio_title,
R.string.unable_to_configure_audio_warning);
}
}
