* finish processing the data in them.
*
* <p>The size of the buffer is determined by multiplying the preview
- * image width, height, and bytes per pixel. The width and height can be
- * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel
+ * image width, height, and bytes per pixel. The width and height can be
+ * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel
* can be computed from
* {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8,
* using the image format from {@link Camera.Parameters#getPreviewFormat()}.
*
* <p>This method is only necessary when
- * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When
+ * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When
* {@link #setPreviewCallback(PreviewCallback)} or
* {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers
- * are automatically allocated.
+ * are automatically allocated. When a supplied buffer is too small to
+ * hold the preview frame data, preview callback will return null and
+ * the buffer will be removed from the buffer queue.
*
* @param callbackBuffer the buffer to add to the queue.
* The size should be width * height * bits_per_pixel / 8.
* @see #setPreviewCallbackWithBuffer(PreviewCallback)
*/
- public native final void addCallbackBuffer(byte[] callbackBuffer);
+ public final void addCallbackBuffer(byte[] callbackBuffer)
+ {
+ _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME);
+ }
+
+ /**
+ * Adds a pre-allocated buffer to the raw image callback buffer queue.
+ * Applications can add one or more buffers to the queue. When a raw image
+ * frame arrives and there is still at least one available buffer, the
+ * buffer will be used to hold the raw image data and removed from the
+ * queue. Then raw image callback is invoked with the buffer. If a raw
+ * image frame arrives but there is no buffer left, the frame is
+ * discarded. Applications should add buffers back when they finish
+ * processing the data in them by calling this method again in order
+ * to avoid running out of raw image callback buffers.
+ *
+ * <p>The size of the buffer is determined by multiplying the raw image
+ * width, height, and bytes per pixel. The width and height can be
+ * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel
+ * can be computed from
+ * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8,
+ * using the image format from {@link Camera.Parameters#getPreviewFormat()}.
+ *
+ * <p>This method is only necessary when the PictureCallbck for raw image
+ * is used while calling {@link #takePicture(Camera.ShutterCallback,
+ * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}.
+ *
+ * Please note that by calling this method, the mode for application-managed
+ * callback buffers is triggered. If this method has never been called,
+ * null will be returned by the raw image callback since there is
+ * no image callback buffer available. Furthermore, When a supplied buffer
+ * is too small to hold the raw image data, raw image callback will return
+ * null and the buffer will be removed from the buffer queue.
+ *
+ * @param callbackBuffer the buffer to add to the raw image callback buffer
+ * queue. The size should be width * height * (bits per pixel) / 8. An
+ * null callbackBuffer will be ignored and won't be added to the queue.
+ *
+ * @see #takePicture(Camera.ShutterCallback,
+ * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}.
+ *
+ * {@hide}
+ */
+ public final void addRawImageCallbackBuffer(byte[] callbackBuffer)
+ {
+ addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE);
+ }
+
+ private final void addCallbackBuffer(byte[] callbackBuffer, int msgType)
+ {
+ // CAMERA_MSG_VIDEO_FRAME may be allowed in the future.
+ if (msgType != CAMERA_MSG_PREVIEW_FRAME &&
+ msgType != CAMERA_MSG_RAW_IMAGE) {
+ throw new IllegalArgumentException(
+ "Unsupported message type: " + msgType);
+ }
+
+ _addCallbackBuffer(callbackBuffer, msgType);
+ }
+
+ private native final void _addCallbackBuffer(
+ byte[] callbackBuffer, int msgType);
private class EventHandler extends Handler
{
PictureCallback jpeg) {
takePicture(shutter, raw, null, jpeg);
}
- private native final void native_takePicture();
+ private native final void native_takePicture(int msgType);
/**
* Triggers an asynchronous image capture. The camera service will initiate
* The shutter callback occurs after the image is captured. This can be used
* to trigger a sound to let the user know that image has been captured. The
* raw callback occurs when the raw image data is available (NOTE: the data
- * may be null if the hardware does not have enough memory to make a copy).
+ * will be null if there is no raw image callback buffer available or the
+ * raw image callback buffer is not large enough to hold the raw image).
* The postview callback occurs when a scaled, fully processed postview
* image is available (NOTE: not all hardware supports this). The jpeg
* callback occurs when the compressed image is available. If the
* @param raw the callback for raw (uncompressed) image data, or null
* @param postview callback with postview image data, may be null
* @param jpeg the callback for JPEG image data, or null
+ *
+ * @see #addRawImageCallbackBuffer(byte[])
*/
public final void takePicture(ShutterCallback shutter, PictureCallback raw,
PictureCallback postview, PictureCallback jpeg) {
mRawImageCallback = raw;
mPostviewCallback = postview;
mJpegCallback = jpeg;
- native_takePicture();
+
+ // If callback is not set, do not send me callbacks.
+ int msgType = 0;
+ if (mShutterCallback != null) {
+ msgType |= CAMERA_MSG_SHUTTER;
+ }
+ if (mRawImageCallback != null) {
+ msgType |= CAMERA_MSG_RAW_IMAGE;
+ }
+ if (mPostviewCallback != null) {
+ msgType |= CAMERA_MSG_POSTVIEW_FRAME;
+ }
+ if (mJpegCallback != null) {
+ msgType |= CAMERA_MSG_COMPRESSED_IMAGE;
+ }
+
+ native_takePicture(msgType);
}
/**
virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2);
virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr);
virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
- void addCallbackBuffer(JNIEnv *env, jbyteArray cbb);
+ void addCallbackBuffer(JNIEnv *env, jbyteArray cbb, int msgType);
void setCallbackMode(JNIEnv *env, bool installed, bool manualMode);
sp<Camera> getCamera() { Mutex::Autolock _l(mLock); return mCamera; }
+ bool isRawImageCallbackBufferAvailable() const;
void release();
private:
void copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType);
+ void clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers);
void clearCallbackBuffers_l(JNIEnv *env);
+ jbyteArray getCallbackBuffer(JNIEnv *env, Vector<jbyteArray> *buffers, size_t bufferSize);
jobject mCameraJObjectWeak; // weak reference to java object
jclass mCameraJClass; // strong reference to java class
sp<Camera> mCamera; // strong reference to native object
Mutex mLock;
+ /*
+ * Global reference application-managed raw image buffer queue.
+ *
+ * Manual-only mode is supported for raw image callbacks, which is
+ * set whenever method addCallbackBuffer() with msgType =
+ * CAMERA_MSG_RAW_IMAGE is called; otherwise, null is returned
+ * with raw image callbacks.
+ */
+ Vector<jbyteArray> mRawImageCallbackBuffers;
+
+ /*
+ * Application-managed preview buffer queue and the flags
+ * associated with the usage of the preview buffer callback.
+ */
Vector<jbyteArray> mCallbackBuffers; // Global reference application managed byte[]
bool mManualBufferMode; // Whether to use application managed buffers.
- bool mManualCameraCallbackSet; // Whether the callback has been set, used to reduce unnecessary calls to set the callback.
+ bool mManualCameraCallbackSet; // Whether the callback has been set, used to
+ // reduce unnecessary calls to set the callback.
};
+bool JNICameraContext::isRawImageCallbackBufferAvailable() const
+{
+ return !mRawImageCallbackBuffers.isEmpty();
+}
+
sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, JNICameraContext** pContext)
{
sp<Camera> camera;
return;
}
JNIEnv *env = AndroidRuntime::getJNIEnv();
+
+ /*
+ * If the notification or msgType is CAMERA_MSG_RAW_IMAGE_NOTIFY, change it
+ * to CAMERA_MSG_RAW_IMAGE since CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed
+ * to the Java app.
+ */
+ if (msgType == CAMERA_MSG_RAW_IMAGE_NOTIFY) {
+ msgType = CAMERA_MSG_RAW_IMAGE;
+ }
+
env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
mCameraJObjectWeak, msgType, ext1, ext2, NULL);
}
+jbyteArray JNICameraContext::getCallbackBuffer(
+ JNIEnv* env, Vector<jbyteArray>* buffers, size_t bufferSize)
+{
+ jbyteArray obj = NULL;
+
+ // Vector access should be protected by lock in postData()
+ if (!buffers->isEmpty()) {
+ LOGV("Using callback buffer from queue of length %d", buffers->size());
+ jbyteArray globalBuffer = buffers->itemAt(0);
+ buffers->removeAt(0);
+
+ obj = (jbyteArray)env->NewLocalRef(globalBuffer);
+ env->DeleteGlobalRef(globalBuffer);
+
+ if (obj != NULL) {
+ jsize bufferLength = env->GetArrayLength(obj);
+ if ((int)bufferLength < (int)bufferSize) {
+ LOGE("Callback buffer was too small! Expected %d bytes, but got %d bytes!",
+ bufferSize, bufferLength);
+ env->DeleteLocalRef(obj);
+ return NULL;
+ }
+ }
+ }
+
+ return obj;
+}
+
void JNICameraContext::copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType)
{
jbyteArray obj = NULL;
ssize_t offset;
size_t size;
sp<IMemoryHeap> heap = dataPtr->getMemory(&offset, &size);
- LOGV("postData: off=%d, size=%d", offset, size);
+ LOGV("copyAndPost: off=%ld, size=%d", offset, size);
uint8_t *heapBase = (uint8_t*)heap->base();
if (heapBase != NULL) {
LOGV("Allocating callback buffer");
obj = env->NewByteArray(size);
} else {
- // Vector access should be protected by lock in postData()
- if(!mCallbackBuffers.isEmpty()) {
- LOGV("Using callback buffer from queue of length %d", mCallbackBuffers.size());
- jbyteArray globalBuffer = mCallbackBuffers.itemAt(0);
- mCallbackBuffers.removeAt(0);
-
- obj = (jbyteArray)env->NewLocalRef(globalBuffer);
- env->DeleteGlobalRef(globalBuffer);
-
- if (obj != NULL) {
- jsize bufferLength = env->GetArrayLength(obj);
- if ((int)bufferLength < (int)size) {
- LOGE("Manually set buffer was too small! Expected %d bytes, but got %d!",
- size, bufferLength);
- env->DeleteLocalRef(obj);
- return;
+ switch (msgType) {
+ case CAMERA_MSG_PREVIEW_FRAME: {
+ obj = getCallbackBuffer(env, &mCallbackBuffers, size);
+
+ if (mCallbackBuffers.isEmpty()) {
+ LOGV("Out of buffers, clearing callback!");
+ mCamera->setPreviewCallbackFlags(FRAME_CALLBACK_FLAG_NOOP);
+ mManualCameraCallbackSet = false;
+
+ if (obj == NULL) {
+ return;
+ }
}
+ break;
}
- }
-
- if(mCallbackBuffers.isEmpty()) {
- LOGV("Out of buffers, clearing callback!");
- mCamera->setPreviewCallbackFlags(FRAME_CALLBACK_FLAG_NOOP);
- mManualCameraCallbackSet = false;
-
- if (obj == NULL) {
+ case CAMERA_MSG_RAW_IMAGE: {
+ obj = getCallbackBuffer(env, &mRawImageCallbackBuffers, size);
+ break;
+ }
+ default: {
+ jniThrowException(env,
+ "java/lang/RuntimeException", "Unsupported message type");
return;
}
}
}
// return data based on callback type
- switch(msgType) {
- case CAMERA_MSG_VIDEO_FRAME:
- // should never happen
- break;
- // don't return raw data to Java
- case CAMERA_MSG_RAW_IMAGE:
- LOGV("rawCallback");
- env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
- mCameraJObjectWeak, msgType, 0, 0, NULL);
- break;
- default:
- // TODO: Change to LOGV
- LOGV("dataCallback(%d, %p)", msgType, dataPtr.get());
- copyAndPost(env, dataPtr, msgType);
- break;
+ switch (msgType) {
+ case CAMERA_MSG_VIDEO_FRAME:
+ // should never happen
+ break;
+
+ // For backward-compatibility purpose, if there is no callback
+ // buffer for raw image, the callback returns null.
+ case CAMERA_MSG_RAW_IMAGE:
+ LOGV("rawCallback");
+ if (mRawImageCallbackBuffers.isEmpty()) {
+ env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
+ mCameraJObjectWeak, msgType, 0, 0, NULL);
+ } else {
+ copyAndPost(env, dataPtr, msgType);
+ }
+ break;
+
+ default:
+ LOGV("dataCallback(%d, %p)", msgType, dataPtr.get());
+ copyAndPost(env, dataPtr, msgType);
+ break;
}
}
if (!installed) {
mCamera->setPreviewCallbackFlags(FRAME_CALLBACK_FLAG_NOOP);
- clearCallbackBuffers_l(env);
+ clearCallbackBuffers_l(env, &mCallbackBuffers);
} else if (mManualBufferMode) {
if (!mCallbackBuffers.isEmpty()) {
mCamera->setPreviewCallbackFlags(FRAME_CALLBACK_FLAG_CAMERA);
}
} else {
mCamera->setPreviewCallbackFlags(FRAME_CALLBACK_FLAG_BARCODE_SCANNER);
- clearCallbackBuffers_l(env);
+ clearCallbackBuffers_l(env, &mCallbackBuffers);
}
}
-void JNICameraContext::addCallbackBuffer(JNIEnv *env, jbyteArray cbb)
+void JNICameraContext::addCallbackBuffer(
+ JNIEnv *env, jbyteArray cbb, int msgType)
{
+ LOGV("addCallbackBuffer: 0x%x", msgType);
if (cbb != NULL) {
Mutex::Autolock _l(mLock);
- jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
- mCallbackBuffers.push(cbb);
-
- LOGV("Adding callback buffer to queue, %d total", mCallbackBuffers.size());
-
- // We want to make sure the camera knows we're ready for the next frame.
- // This may have come unset had we not had a callbackbuffer ready for it last time.
- if (mManualBufferMode && !mManualCameraCallbackSet) {
- mCamera->setPreviewCallbackFlags(FRAME_CALLBACK_FLAG_CAMERA);
- mManualCameraCallbackSet = true;
+ switch (msgType) {
+ case CAMERA_MSG_PREVIEW_FRAME: {
+ jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
+ mCallbackBuffers.push(callbackBuffer);
+
+ LOGV("Adding callback buffer to queue, %d total",
+ mCallbackBuffers.size());
+
+ // We want to make sure the camera knows we're ready for the
+ // next frame. This may have come unset had we not had a
+ // callbackbuffer ready for it last time.
+ if (mManualBufferMode && !mManualCameraCallbackSet) {
+ mCamera->setPreviewCallbackFlags(FRAME_CALLBACK_FLAG_CAMERA);
+ mManualCameraCallbackSet = true;
+ }
+ break;
+ }
+ case CAMERA_MSG_RAW_IMAGE: {
+ jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
+ mRawImageCallbackBuffers.push(callbackBuffer);
+ break;
+ }
+ default: {
+ jniThrowException(env,
+ "java/lang/IllegalArgumentException",
+ "Unsupported message type");
+ return;
+ }
}
} else {
LOGE("Null byte array!");
void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env)
{
- LOGV("Clearing callback buffers, %d remained", mCallbackBuffers.size());
- while(!mCallbackBuffers.isEmpty()) {
- env->DeleteGlobalRef(mCallbackBuffers.top());
- mCallbackBuffers.pop();
+ clearCallbackBuffers_l(env, &mCallbackBuffers);
+ clearCallbackBuffers_l(env, &mRawImageCallbackBuffers);
+}
+
+void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers) {
+ LOGV("Clearing callback buffers, %d remained", buffers->size());
+ while (!buffers->isEmpty()) {
+ env->DeleteGlobalRef(buffers->top());
+ buffers->pop();
}
}
context->setCallbackMode(env, installed, manualBuffer);
}
-static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes) {
- LOGV("addCallbackBuffer");
+static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes, int msgType) {
+ LOGV("addCallbackBuffer: 0x%x", msgType);
JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context));
if (context != NULL) {
- context->addCallbackBuffer(env, bytes);
+ context->addCallbackBuffer(env, bytes, msgType);
}
}
}
}
-static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz)
+static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz, int msgType)
{
LOGV("takePicture");
JNICameraContext* context;
sp<Camera> camera = get_native_camera(env, thiz, &context);
if (camera == 0) return;
- if (camera->takePicture() != NO_ERROR) {
+ /*
+ * When CAMERA_MSG_RAW_IMAGE is requested, if the raw image callback
+ * buffer is available, CAMERA_MSG_RAW_IMAGE is enabled to get the
+ * notification _and_ the data; otherwise, CAMERA_MSG_RAW_IMAGE_NOTIFY
+ * is enabled to receive the callback notification but no data.
+ *
+ * Note that CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed to the
+ * Java application.
+ */
+ if (msgType & CAMERA_MSG_RAW_IMAGE) {
+ LOGV("Enable raw image callback buffer");
+ if (!context->isRawImageCallbackBufferAvailable()) {
+ LOGV("Enable raw image notification, since no callback buffer exists");
+ msgType &= ~CAMERA_MSG_RAW_IMAGE;
+ msgType |= CAMERA_MSG_RAW_IMAGE_NOTIFY;
+ }
+ }
+
+ if (camera->takePicture(msgType) != NO_ERROR) {
jniThrowException(env, "java/lang/RuntimeException", "takePicture failed");
return;
}
{ "setHasPreviewCallback",
"(ZZ)V",
(void *)android_hardware_Camera_setHasPreviewCallback },
- { "addCallbackBuffer",
- "([B)V",
+ { "_addCallbackBuffer",
+ "([BI)V",
(void *)android_hardware_Camera_addCallbackBuffer },
{ "native_autoFocus",
"()V",
"()V",
(void *)android_hardware_Camera_cancelAutoFocus },
{ "native_takePicture",
- "()V",
+ "(I)V",
(void *)android_hardware_Camera_takePicture },
{ "native_setParameters",
"(Ljava/lang/String;)V",
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