@Override
public void run() {
int cameraFramesCount = cameraStatistics.getAndResetFrameCount();
int cameraFps =
(cameraFramesCount * 1000 + CAMERA_OBSERVER_PERIOD_MS / 2)
/ CAMERA_OBSERVER_PERIOD_MS;
Logging.d(
TAG,
"Camera fps: "
+ cameraFps
+ ". Pending buffers: "
+ cameraStatistics.pendingFramesTimeStamps());
if (cameraFramesCount == 0) {
++freezePeriodCount;
if (CAMERA_OBSERVER_PERIOD_MS * freezePeriodCount > CAMERA_FREEZE_REPORT_TIMOUT_MS
&& eventsHandler != null) {
Logging.e(TAG, "Camera freezed.");
if (cameraStatistics.pendingFramesCount() == cameraStatistics.maxPendingFrames) {
eventsHandler.onCameraError("Camera failure. Client must return video buffers.");
} else {
eventsHandler.onCameraError("Camera failure.");
}
return;
}
} else {
freezePeriodCount = 0;
}
cameraThreadHandler.postDelayed(this, CAMERA_OBSERVER_PERIOD_MS);
}
// Called on cameraThread so must not "synchronized".
@Override
public void onPreviewFrame(byte[] data, Camera callbackCamera) {
checkIsOnCameraThread();
if (camera == null) {
return;
}
if (camera != callbackCamera) {
throw new RuntimeException("Unexpected camera in callback!");
}
final long captureTimeNs = TimeUnit.MILLISECONDS.toNanos(SystemClock.elapsedRealtime());
if (eventsHandler != null && !firstFrameReported) {
eventsHandler.onFirstFrameAvailable();
firstFrameReported = true;
}
// Mark the frame owning |data| as used.
// Note that since data is directBuffer,
// data.length >= videoBuffers.frameSize.
if (videoBuffers.reserveByteBuffer(data, captureTimeNs)) {
cameraStatistics.addPendingFrame(captureTimeNs);
frameObserver.onByteBufferFrameCaptured(
data,
videoBuffers.frameSize,
captureFormat.width,
captureFormat.height,
getFrameOrientation(),
captureTimeNs);
} else {
Logging.w(TAG, "reserveByteBuffer failed - dropping frame.");
}
}
private void stopCaptureOnCameraThread() {
checkIsOnCameraThread();
Logging.d(TAG, "stopCaptureOnCameraThread");
if (openCameraOnCodecThreadRunner != null) {
cameraThreadHandler.removeCallbacks(openCameraOnCodecThreadRunner);
}
openCameraAttempts = 0;
if (camera == null) {
Logging.e(TAG, "Calling stopCapture() for already stopped camera.");
return;
}
cameraThreadHandler.removeCallbacks(cameraObserver);
cameraStatistics.getAndResetFrameCount();
Logging.d(TAG, "Stop preview.");
camera.stopPreview();
camera.setPreviewCallbackWithBuffer(null);
if (!isCapturingToTexture()) {
videoBuffers.stopReturnBuffersToCamera();
Logging.d(
TAG,
"stopReturnBuffersToCamera called."
+ (cameraStatistics.pendingFramesCount() == 0
? " All buffers have been returned."
: " Pending buffers: " + cameraStatistics.pendingFramesTimeStamps() + "."));
}
captureFormat = null;
Logging.d(TAG, "Release camera.");
camera.release();
camera = null;
if (eventsHandler != null) {
eventsHandler.onCameraClosed();
}
}
@Override
public void onError(int error, Camera camera) {
String errorMessage;
if (error == android.hardware.Camera.CAMERA_ERROR_SERVER_DIED) {
errorMessage = "Camera server died!";
} else {
errorMessage = "Camera error: " + error;
}
Logging.e(TAG, errorMessage);
if (eventsHandler != null) {
eventsHandler.onCameraError(errorMessage);
}
}
private void startCaptureOnCameraThread(
final int width,
final int height,
final int framerate,
final CapturerObserver frameObserver,
final Context applicationContext) {
Throwable error = null;
checkIsOnCameraThread();
if (camera != null) {
throw new RuntimeException("Camera has already been started.");
}
this.applicationContext = applicationContext;
this.frameObserver = frameObserver;
this.firstFrameReported = false;
try {
try {
synchronized (cameraIdLock) {
Logging.d(TAG, "Opening camera " + id);
if (eventsHandler != null) {
eventsHandler.onCameraOpening(id);
}
camera = Camera.open(id);
info = new Camera.CameraInfo();
Camera.getCameraInfo(id, info);
}
} catch (RuntimeException e) {
openCameraAttempts++;
if (openCameraAttempts < MAX_OPEN_CAMERA_ATTEMPTS) {
Logging.e(TAG, "Camera.open failed, retrying", e);
openCameraOnCodecThreadRunner =
new Runnable() {
@Override
public void run() {
startCaptureOnCameraThread(
width, height, framerate, frameObserver, applicationContext);
}
};
cameraThreadHandler.postDelayed(openCameraOnCodecThreadRunner, OPEN_CAMERA_DELAY_MS);
return;
}
openCameraAttempts = 0;
throw e;
}
try {
camera.setPreviewTexture(surfaceHelper.getSurfaceTexture());
} catch (IOException e) {
Logging.e(TAG, "setPreviewTexture failed", error);
throw new RuntimeException(e);
}
Logging.d(
TAG,
"Camera orientation: "
+ info.orientation
+ " .Device orientation: "
+ getDeviceOrientation());
camera.setErrorCallback(cameraErrorCallback);
startPreviewOnCameraThread(width, height, framerate);
frameObserver.onCapturerStarted(true);
// Start camera observer.
cameraThreadHandler.postDelayed(cameraObserver, CAMERA_OBSERVER_PERIOD_MS);
return;
} catch (RuntimeException e) {
error = e;
}
Logging.e(TAG, "startCapture failed", error);
stopCaptureOnCameraThread();
frameObserver.onCapturerStarted(false);
if (eventsHandler != null) {
eventsHandler.onCameraError("Camera can not be started.");
}
return;
}