Пример #1
0
void CallbackPipeline::do_capture(JNIEnv *env) {
	ENTER();

	uvc_frame_t *frame;
	uvc_frame_t *temp = get_frame(default_frame_size);
	uvc_frame_t *callback_frame;
	uint32_t width = 0, height = 0;
	size_t sz = default_frame_size;

	if (LIKELY(temp)) {
		for (; isRunning() && isCapturing();) {
			frame = waitCaptureFrame();
			if ((LIKELY(frame))) {
				if (UNLIKELY((width != frame->width) || (height != frame->height))) {
					width = frame->width;
					height = frame->height;
					callbackPixelFormatChanged(width, height);
					uvc_ensure_frame_size(temp, callbackPixelBytes);
					sz = callbackPixelBytes;
				}
				if (mFrameCallbackObj) {
					callback_frame = frame;
					sz = frame->actual_bytes;
					if (mFrameCallbackFunc) {
						callback_frame = temp;
						sz = callbackPixelBytes;
						int b = mFrameCallbackFunc(frame, temp);
						if (UNLIKELY(b)) {
							LOGW("failed to convert to callback frame");
							goto SKIP;
						}
					}
					jobject buf = env->NewDirectByteBuffer(callback_frame->data, callbackPixelBytes);
					env->CallVoidMethod(mFrameCallbackObj, iframecallback_fields.onFrame, buf);
					env->ExceptionClear();
					env->DeleteLocalRef(buf);
				}
SKIP:
				recycle_frame(frame);
			}
		}
		recycle_frame(temp);
	}

	EXIT();
}
Пример #2
0
int UVCPreview::setFrameCallback(JNIEnv *env, jobject frame_callback_obj, int pixel_format) {
	
	ENTER();
	pthread_mutex_lock(&capture_mutex);
	{
		if (isRunning() && isCapturing()) {
			mIsCapturing = false;
			if (mFrameCallbackObj) {
				pthread_cond_signal(&capture_sync);
				pthread_cond_wait(&capture_sync, &capture_mutex);	// wait finishing capturing
			}
		}
		if (!env->IsSameObject(mFrameCallbackObj, frame_callback_obj))	{
			iframecallback_fields.onFrame = NULL;
			if (mFrameCallbackObj) {
				env->DeleteGlobalRef(mFrameCallbackObj);
			}
			mFrameCallbackObj = frame_callback_obj;
			if (frame_callback_obj) {
				// get method IDs of Java object for callback
				jclass clazz = env->GetObjectClass(frame_callback_obj);
				if (LIKELY(clazz)) {
					iframecallback_fields.onFrame = env->GetMethodID(clazz,
						"onFrame",	"(Ljava/nio/ByteBuffer;)V");
				} else {
					LOGW("failed to get object class");
				}
				env->ExceptionClear();
				if (!iframecallback_fields.onFrame) {
					LOGE("Can't find IFrameCallback#onFrame");
					env->DeleteGlobalRef(frame_callback_obj);
					mFrameCallbackObj = frame_callback_obj = NULL;
				}
			}
		}
		if (frame_callback_obj) {
			mPixelFormat = pixel_format;
			callbackPixelFormatChanged();
		}
	}
	pthread_mutex_unlock(&capture_mutex);
	RETURN(0, int);
}