tests/camera2/camera2_utils.cpp - platform/hardware/libhardware - Git at Google

 /*
  * Copyright (C) 2012 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 // Utility classes for camera2 HAL testing

 #define LOG_TAG "Camera2_test_utils"
 #define LOG_NDEBUG 0

 #include "utils/Log.h"
 #include "camera2_utils.h"
 #include <dlfcn.h>

 namespace android {
 namespace camera2 {
 namespace tests {

 /**
  * MetadataQueue
  */

 MetadataQueue::MetadataQueue():
             mDevice(NULL),
             mFrameCount(0),
             mCount(0),
             mStreamSlotCount(0),
             mSignalConsumer(true)
 {
     camera2_request_queue_src_ops::dequeue_request = consumer_dequeue;
     camera2_request_queue_src_ops::request_count = consumer_buffer_count;
     camera2_request_queue_src_ops::free_request = consumer_free;

     camera2_frame_queue_dst_ops::dequeue_frame = producer_dequeue;
     camera2_frame_queue_dst_ops::cancel_frame = producer_cancel;
     camera2_frame_queue_dst_ops::enqueue_frame = producer_enqueue;
 }

 MetadataQueue::~MetadataQueue() {
     freeBuffers(mEntries.begin(), mEntries.end());
     freeBuffers(mStreamSlot.begin(), mStreamSlot.end());
 }

 // Interface to camera2 HAL as consumer (input requests/reprocessing)
 const camera2_request_queue_src_ops_t* MetadataQueue::getToConsumerInterface() {
     return static_cast<camera2_request_queue_src_ops_t*>(this);
 }

 void MetadataQueue::setFromConsumerInterface(camera2_device_t *d) {
     mDevice = d;
 }

 const camera2_frame_queue_dst_ops_t* MetadataQueue::getToProducerInterface() {
     return static_cast<camera2_frame_queue_dst_ops_t*>(this);
 }

 // Real interfaces
 status_t MetadataQueue::enqueue(camera_metadata_t *buf) {
     Mutex::Autolock l(mMutex);

     mCount++;
     mEntries.push_back(buf);
     notEmpty.signal();

     if (mSignalConsumer && mDevice != NULL) {
         mSignalConsumer = false;

         mMutex.unlock();
         ALOGV("%s: Signaling consumer", __FUNCTION__);
         mDevice->ops->notify_request_queue_not_empty(mDevice);
         mMutex.lock();
     }
     return OK;
 }

 int MetadataQueue::getBufferCount() {
     Mutex::Autolock l(mMutex);
     if (mStreamSlotCount > 0) {
         return CAMERA2_REQUEST_QUEUE_IS_BOTTOMLESS;
     }
     return mCount;
 }

 status_t MetadataQueue::dequeue(camera_metadata_t **buf, bool incrementCount) {
     Mutex::Autolock l(mMutex);

     if (mCount == 0) {
         if (mStreamSlotCount == 0) {
             ALOGV("%s: Empty", __FUNCTION__);
             *buf = NULL;
             mSignalConsumer = true;
             return OK;
         }
         ALOGV("%s: Streaming %d frames to queue", __FUNCTION__,
               mStreamSlotCount);

         for (List<camera_metadata_t*>::iterator slotEntry = mStreamSlot.begin();
                 slotEntry != mStreamSlot.end();
                 slotEntry++ ) {
             size_t entries = get_camera_metadata_entry_count(*slotEntry);
             size_t dataBytes = get_camera_metadata_data_count(*slotEntry);

             camera_metadata_t *copy = allocate_camera_metadata(entries, dataBytes);
             append_camera_metadata(copy, *slotEntry);
             mEntries.push_back(copy);
         }
         mCount = mStreamSlotCount;
     }
     ALOGV("MetadataQueue: deque (%d buffers)", mCount);
     camera_metadata_t *b = *(mEntries.begin());
     mEntries.erase(mEntries.begin());

     if (incrementCount) {
         add_camera_metadata_entry(b,
                 ANDROID_REQUEST_FRAME_COUNT,
                 (void**)&mFrameCount, 1);
         mFrameCount++;
     }

     *buf = b;
     mCount--;

     return OK;
 }

 status_t MetadataQueue::waitForBuffer(nsecs_t timeout) {
     Mutex::Autolock l(mMutex);
     status_t res;
     while (mCount == 0) {
         res = notEmpty.waitRelative(mMutex,timeout);
         if (res != OK) return res;
     }
     return OK;
 }

 status_t MetadataQueue::setStreamSlot(camera_metadata_t *buf) {
     if (buf == NULL) {
         freeBuffers(mStreamSlot.begin(), mStreamSlot.end());
         mStreamSlotCount = 0;
         return OK;
     }
     if (mStreamSlotCount > 1) {
         List<camera_metadata_t*>::iterator deleter = ++mStreamSlot.begin();
         freeBuffers(++mStreamSlot.begin(), mStreamSlot.end());
         mStreamSlotCount = 1;
     }
     if (mStreamSlotCount == 1) {
         free_camera_metadata( *(mStreamSlot.begin()) );
         *(mStreamSlot.begin()) = buf;
     } else {
         mStreamSlot.push_front(buf);
         mStreamSlotCount = 1;
     }
     return OK;
 }

 status_t MetadataQueue::setStreamSlot(const List<camera_metadata_t*> &bufs) {
     if (mStreamSlotCount > 0) {
         freeBuffers(mStreamSlot.begin(), mStreamSlot.end());
     }
     mStreamSlot = bufs;
     mStreamSlotCount = mStreamSlot.size();

     return OK;
 }

 status_t MetadataQueue::freeBuffers(List<camera_metadata_t*>::iterator start,
                                     List<camera_metadata_t*>::iterator end) {
     while (start != end) {
         free_camera_metadata(*start);
         start = mStreamSlot.erase(start);
     }
     return OK;
 }

 MetadataQueue* MetadataQueue::getInstance(
         const camera2_request_queue_src_ops_t *q) {
     const MetadataQueue* cmq = static_cast<const MetadataQueue*>(q);
     return const_cast<MetadataQueue*>(cmq);
 }

 MetadataQueue* MetadataQueue::getInstance(
         const camera2_frame_queue_dst_ops_t *q) {
     const MetadataQueue* cmq = static_cast<const MetadataQueue*>(q);
     return const_cast<MetadataQueue*>(cmq);
 }

 int MetadataQueue::consumer_buffer_count(
         const camera2_request_queue_src_ops_t *q) {
     MetadataQueue *queue = getInstance(q);
     return queue->getBufferCount();
 }

 int MetadataQueue::consumer_dequeue(const camera2_request_queue_src_ops_t *q,
         camera_metadata_t **buffer) {
     MetadataQueue *queue = getInstance(q);
     return queue->dequeue(buffer, true);
 }

 int MetadataQueue::consumer_free(const camera2_request_queue_src_ops_t *q,
         camera_metadata_t *old_buffer) {
     MetadataQueue *queue = getInstance(q);
     free_camera_metadata(old_buffer);
     return OK;
 }

 int MetadataQueue::producer_dequeue(const camera2_frame_queue_dst_ops_t *q,
         size_t entries, size_t bytes,
         camera_metadata_t **buffer) {
     camera_metadata_t *new_buffer =
             allocate_camera_metadata(entries, bytes);
     if (new_buffer == NULL) return NO_MEMORY;
     *buffer = new_buffer;
         return OK;
 }

 int MetadataQueue::producer_cancel(const camera2_frame_queue_dst_ops_t *q,
         camera_metadata_t *old_buffer) {
     free_camera_metadata(old_buffer);
     return OK;
 }

 int MetadataQueue::producer_enqueue(const camera2_frame_queue_dst_ops_t *q,
         camera_metadata_t *filled_buffer) {
     MetadataQueue *queue = getInstance(q);
     return queue->enqueue(filled_buffer);
 }

 /**
  * NotifierListener
  */

 NotifierListener::NotifierListener() {
 }

 status_t NotifierListener::getNotificationsFrom(camera2_device *dev) {
     if (!dev) return BAD_VALUE;
     status_t err;
     err = dev->ops->set_notify_callback(dev,
             notify_callback_dispatch,
             (void*)this);
     return err;
 }

 status_t NotifierListener::getNextNotification(int32_t *msg_type,
         int32_t *ext1,
         int32_t *ext2,
         int32_t *ext3) {
     Mutex::Autolock l(mMutex);
     if (mNotifications.size() == 0) return BAD_VALUE;
     return getNextNotificationLocked(msg_type, ext1, ext2, ext3);
 }

 status_t NotifierListener::waitForNotification(int32_t *msg_type,
         int32_t *ext1,
         int32_t *ext2,
         int32_t *ext3) {
     Mutex::Autolock l(mMutex);
     while (mNotifications.size() == 0) {
         mNewNotification.wait(mMutex);
     }
     return getNextNotificationLocked(msg_type, ext1, ext2, ext3);
 }

 int NotifierListener::numNotifications() {
     Mutex::Autolock l(mMutex);
     return mNotifications.size();
 }

 status_t NotifierListener::getNextNotificationLocked(int32_t *msg_type,
         int32_t *ext1,
         int32_t *ext2,
         int32_t *ext3) {
     *msg_type = mNotifications.begin()->msg_type;
     *ext1 = mNotifications.begin()->ext1;
     *ext2 = mNotifications.begin()->ext2;
     *ext3 = mNotifications.begin()->ext3;
     mNotifications.erase(mNotifications.begin());
     return OK;
 }

 void NotifierListener::onNotify(int32_t msg_type,
         int32_t ext1,
         int32_t ext2,
         int32_t ext3) {
     Mutex::Autolock l(mMutex);
     mNotifications.push_back(Notification(msg_type, ext1, ext2, ext3));
     mNewNotification.signal();
 }

 void NotifierListener::notify_callback_dispatch(int32_t msg_type,
         int32_t ext1,
         int32_t ext2,
         int32_t ext3,
         void *user) {
     NotifierListener *me = reinterpret_cast<NotifierListener*>(user);
     me->onNotify(msg_type, ext1, ext2, ext3);
 }

 /**
  * StreamAdapter
  */

 #ifndef container_of
 #define container_of(ptr, type, member) \
     (type *)((char*)(ptr) - offsetof(type, member))
 #endif

 StreamAdapter::StreamAdapter(sp<IGraphicBufferProducer> consumer):
         mState(UNINITIALIZED), mDevice(NULL),
         mId(-1),
         mWidth(0), mHeight(0), mFormat(0)
 {
     mConsumerInterface = new SurfaceTextureClient(consumer);
     camera2_stream_ops::dequeue_buffer = dequeue_buffer;
     camera2_stream_ops::enqueue_buffer = enqueue_buffer;
     camera2_stream_ops::cancel_buffer = cancel_buffer;
     camera2_stream_ops::set_crop = set_crop;
 }

 StreamAdapter::~StreamAdapter() {
     disconnect();
 }

 status_t StreamAdapter::connectToDevice(camera2_device_t *d,
         uint32_t width, uint32_t height, int format) {
     if (mState != UNINITIALIZED) return INVALID_OPERATION;
     if (d == NULL) {
         ALOGE("%s: Null device passed to stream adapter", __FUNCTION__);
         return BAD_VALUE;
     }

     status_t res;

     mWidth = width;
     mHeight = height;
     mFormat = format;

     // Allocate device-side stream interface

     uint32_t id;
     uint32_t formatActual; // ignored
     uint32_t usage;
     uint32_t maxBuffers = 2;
     res = d->ops->allocate_stream(d,
             mWidth, mHeight, mFormat, getStreamOps(),
             &id, &formatActual, &usage, &maxBuffers);
     if (res != OK) {
         ALOGE("%s: Device stream allocation failed: %s (%d)",
                 __FUNCTION__, strerror(-res), res);
         mState = UNINITIALIZED;
         return res;
     }
     mDevice = d;

     mId = id;
     mUsage = usage;
     mMaxProducerBuffers = maxBuffers;

     // Configure consumer-side ANativeWindow interface

     res = native_window_api_connect(mConsumerInterface.get(),
             NATIVE_WINDOW_API_CAMERA);
     if (res != OK) {
         ALOGE("%s: Unable to connect to native window for stream %d",
                 __FUNCTION__, mId);
         mState = ALLOCATED;
         return res;
     }

     res = native_window_set_usage(mConsumerInterface.get(), mUsage);
     if (res != OK) {
         ALOGE("%s: Unable to configure usage %08x for stream %d",
                 __FUNCTION__, mUsage, mId);
         mState = CONNECTED;
         return res;
     }

     res = native_window_set_buffers_geometry(mConsumerInterface.get(),
             mWidth, mHeight, mFormat);
     if (res != OK) {
         ALOGE("%s: Unable to configure buffer geometry"
                 " %d x %d, format 0x%x for stream %d",
                 __FUNCTION__, mWidth, mHeight, mFormat, mId);
         mState = CONNECTED;
         return res;
     }

     int maxConsumerBuffers;
     res = mConsumerInterface->query(mConsumerInterface.get(),
             NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, &maxConsumerBuffers);
     if (res != OK) {
         ALOGE("%s: Unable to query consumer undequeued"
                 " buffer count for stream %d", __FUNCTION__, mId);
         mState = CONNECTED;
         return res;
     }
     mMaxConsumerBuffers = maxConsumerBuffers;

     ALOGV("%s: Producer wants %d buffers, consumer wants %d", __FUNCTION__,
             mMaxProducerBuffers, mMaxConsumerBuffers);

     int totalBuffers = mMaxConsumerBuffers + mMaxProducerBuffers;

     res = native_window_set_buffer_count(mConsumerInterface.get(),
             totalBuffers);
     if (res != OK) {
         ALOGE("%s: Unable to set buffer count for stream %d",
                 __FUNCTION__, mId);
         mState = CONNECTED;
         return res;
     }

     // Register allocated buffers with HAL device
     buffer_handle_t *buffers = new buffer_handle_t[totalBuffers];
     ANativeWindowBuffer **anwBuffers = new ANativeWindowBuffer*[totalBuffers];
     int bufferIdx = 0;
     for (; bufferIdx < totalBuffers; bufferIdx++) {
         res = native_window_dequeue_buffer_and_wait(mConsumerInterface.get(),
                 &anwBuffers[bufferIdx]);
         if (res != OK) {
             ALOGE("%s: Unable to dequeue buffer %d for initial registration for"
                     "stream %d", __FUNCTION__, bufferIdx, mId);
             mState = CONNECTED;
             goto cleanUpBuffers;
         }
         buffers[bufferIdx] = anwBuffers[bufferIdx]->handle;
     }

     res = mDevice->ops->register_stream_buffers(mDevice,
             mId,
             totalBuffers,
             buffers);
     if (res != OK) {
         ALOGE("%s: Unable to register buffers with HAL device for stream %d",
                 __FUNCTION__, mId);
         mState = CONNECTED;
     } else {
         mState = ACTIVE;
     }

 cleanUpBuffers:
     for (int i = 0; i < bufferIdx; i++) {
         res = mConsumerInterface->cancelBuffer(mConsumerInterface.get(),
                 anwBuffers[i], -1);
     }
     delete anwBuffers;
     delete buffers;

     return res;
 }

 status_t StreamAdapter::disconnect() {
     status_t res;
     if (mState >= ALLOCATED) {
         res = mDevice->ops->release_stream(mDevice, mId);
         if (res != OK) {
             ALOGE("%s: Unable to release stream %d",
                     __FUNCTION__, mId);
             return res;
         }
     }
     if (mState >= CONNECTED) {
         res = native_window_api_disconnect(mConsumerInterface.get(),
                 NATIVE_WINDOW_API_CAMERA);
         if (res != OK) {
             ALOGE("%s: Unable to disconnect stream %d from native window",
                     __FUNCTION__, mId);
             return res;
         }
     }
     mId = -1;
     mState = DISCONNECTED;
     return OK;
 }

 int StreamAdapter::getId() {
     return mId;
 }

 const camera2_stream_ops *StreamAdapter::getStreamOps() {
     return static_cast<camera2_stream_ops *>(this);
 }

 ANativeWindow* StreamAdapter::toANW(const camera2_stream_ops_t *w) {
     return static_cast<const StreamAdapter*>(w)->mConsumerInterface.get();
 }

 int StreamAdapter::dequeue_buffer(const camera2_stream_ops_t *w,
         buffer_handle_t** buffer) {
     int res;
     int state = static_cast<const StreamAdapter*>(w)->mState;
     if (state != ACTIVE) {
         ALOGE("%s: Called when in bad state: %d", __FUNCTION__, state);
         return INVALID_OPERATION;
     }

     ANativeWindow *a = toANW(w);
     ANativeWindowBuffer* anb;
     res = native_window_dequeue_buffer_and_wait(a, &anb);
     if (res != OK) return res;

     *buffer = &(anb->handle);

     return res;
 }

 int StreamAdapter::enqueue_buffer(const camera2_stream_ops_t* w,
         int64_t timestamp,
         buffer_handle_t* buffer) {
     int state = static_cast<const StreamAdapter*>(w)->mState;
     if (state != ACTIVE) {
         ALOGE("%s: Called when in bad state: %d", __FUNCTION__, state);
         return INVALID_OPERATION;
     }
     ANativeWindow *a = toANW(w);
     status_t err;
     err = native_window_set_buffers_timestamp(a, timestamp);
     if (err != OK) return err;
     return a->queueBuffer(a,
             container_of(buffer, ANativeWindowBuffer, handle), -1);
 }

 int StreamAdapter::cancel_buffer(const camera2_stream_ops_t* w,
         buffer_handle_t* buffer) {
     int state = static_cast<const StreamAdapter*>(w)->mState;
     if (state != ACTIVE) {
         ALOGE("%s: Called when in bad state: %d", __FUNCTION__, state);
         return INVALID_OPERATION;
     }
     ANativeWindow *a = toANW(w);
     return a->cancelBuffer(a,
             container_of(buffer, ANativeWindowBuffer, handle), -1);
 }

 int StreamAdapter::set_crop(const camera2_stream_ops_t* w,
         int left, int top, int right, int bottom) {
     int state = static_cast<const StreamAdapter*>(w)->mState;
     if (state != ACTIVE) {
         ALOGE("%s: Called when in bad state: %d", __FUNCTION__, state);
         return INVALID_OPERATION;
     }
     ANativeWindow *a = toANW(w);
     android_native_rect_t crop = { left, top, right, bottom };
     return native_window_set_crop(a, &crop);
 }

 /**
  * FrameWaiter
  */

 FrameWaiter::FrameWaiter():
         mPendingFrames(0) {
 }

 status_t FrameWaiter::waitForFrame(nsecs_t timeout) {
     status_t res;
     Mutex::Autolock lock(mMutex);
     while (mPendingFrames == 0) {
         res = mCondition.waitRelative(mMutex, timeout);
         if (res != OK) return res;
     }
     mPendingFrames--;
     return OK;
 }

 void FrameWaiter::onFrameAvailable() {
     Mutex::Autolock lock(mMutex);
     mPendingFrames++;
     mCondition.signal();
 }

 int HWModuleHelpers::closeModule(hw_module_t* module) {
     int status;

     if (!module) {
         return -EINVAL;
     }

     status = dlclose(module->dso);
     if (status != 0) {
         char const *err_str = dlerror();
         ALOGE("%s dlclose failed, error: %s", __func__, err_str ?: "unknown");
     }

     return status;
 }

 } // namespace tests
 } // namespace camera2
 } // namespace android
	/*
	* Copyright (C) 2012 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	// Utility classes for camera2 HAL testing

	#define LOG_TAG "Camera2_test_utils"
	#define LOG_NDEBUG 0

	#include "utils/Log.h"
	#include "camera2_utils.h"
	#include <dlfcn.h>

	namespace android {
	namespace camera2 {
	namespace tests {

	/**
	* MetadataQueue
	*/

	MetadataQueue::MetadataQueue():
	mDevice(NULL),
	mFrameCount(0),
	mCount(0),
	mStreamSlotCount(0),
	mSignalConsumer(true)
	{
	camera2_request_queue_src_ops::dequeue_request = consumer_dequeue;
	camera2_request_queue_src_ops::request_count = consumer_buffer_count;
	camera2_request_queue_src_ops::free_request = consumer_free;

	camera2_frame_queue_dst_ops::dequeue_frame = producer_dequeue;
	camera2_frame_queue_dst_ops::cancel_frame = producer_cancel;
	camera2_frame_queue_dst_ops::enqueue_frame = producer_enqueue;
	}

	MetadataQueue::~MetadataQueue() {
	freeBuffers(mEntries.begin(), mEntries.end());
	freeBuffers(mStreamSlot.begin(), mStreamSlot.end());
	}

	// Interface to camera2 HAL as consumer (input requests/reprocessing)
	const camera2_request_queue_src_ops_t* MetadataQueue::getToConsumerInterface() {
	return static_cast<camera2_request_queue_src_ops_t*>(this);
	}

	void MetadataQueue::setFromConsumerInterface(camera2_device_t *d) {
	mDevice = d;
	}

	const camera2_frame_queue_dst_ops_t* MetadataQueue::getToProducerInterface() {
	return static_cast<camera2_frame_queue_dst_ops_t*>(this);
	}

	// Real interfaces
	status_t MetadataQueue::enqueue(camera_metadata_t *buf) {
	Mutex::Autolock l(mMutex);

	mCount++;
	mEntries.push_back(buf);
	notEmpty.signal();

	if (mSignalConsumer && mDevice != NULL) {
	mSignalConsumer = false;

	mMutex.unlock();
	ALOGV("%s: Signaling consumer", __FUNCTION__);
	mDevice->ops->notify_request_queue_not_empty(mDevice);
	mMutex.lock();
	}
	return OK;
	}

	int MetadataQueue::getBufferCount() {
	Mutex::Autolock l(mMutex);
	if (mStreamSlotCount > 0) {
	return CAMERA2_REQUEST_QUEUE_IS_BOTTOMLESS;
	}
	return mCount;
	}

	status_t MetadataQueue::dequeue(camera_metadata_t **buf, bool incrementCount) {
	Mutex::Autolock l(mMutex);

	if (mCount == 0) {
	if (mStreamSlotCount == 0) {
	ALOGV("%s: Empty", __FUNCTION__);
	*buf = NULL;
	mSignalConsumer = true;
	return OK;
	}
	ALOGV("%s: Streaming %d frames to queue", __FUNCTION__,
	mStreamSlotCount);

	for (List<camera_metadata_t*>::iterator slotEntry = mStreamSlot.begin();
	slotEntry != mStreamSlot.end();
	slotEntry++ ) {
	size_t entries = get_camera_metadata_entry_count(*slotEntry);
	size_t dataBytes = get_camera_metadata_data_count(*slotEntry);

	camera_metadata_t *copy = allocate_camera_metadata(entries, dataBytes);
	append_camera_metadata(copy, *slotEntry);
	mEntries.push_back(copy);
	}
	mCount = mStreamSlotCount;
	}
	ALOGV("MetadataQueue: deque (%d buffers)", mCount);
	camera_metadata_t b = (mEntries.begin());
	mEntries.erase(mEntries.begin());

	if (incrementCount) {
	add_camera_metadata_entry(b,
	ANDROID_REQUEST_FRAME_COUNT,
	(void**)&mFrameCount, 1);
	mFrameCount++;
	}

	*buf = b;
	mCount--;

	return OK;
	}

	status_t MetadataQueue::waitForBuffer(nsecs_t timeout) {
	Mutex::Autolock l(mMutex);
	status_t res;
	while (mCount == 0) {
	res = notEmpty.waitRelative(mMutex,timeout);
	if (res != OK) return res;
	}
	return OK;
	}

	status_t MetadataQueue::setStreamSlot(camera_metadata_t *buf) {
	if (buf == NULL) {
	freeBuffers(mStreamSlot.begin(), mStreamSlot.end());
	mStreamSlotCount = 0;
	return OK;
	}
	if (mStreamSlotCount > 1) {
	List<camera_metadata_t*>::iterator deleter = ++mStreamSlot.begin();
	freeBuffers(++mStreamSlot.begin(), mStreamSlot.end());
	mStreamSlotCount = 1;
	}
	if (mStreamSlotCount == 1) {
	free_camera_metadata( *(mStreamSlot.begin()) );
	*(mStreamSlot.begin()) = buf;
	} else {
	mStreamSlot.push_front(buf);
	mStreamSlotCount = 1;
	}
	return OK;
	}

	status_t MetadataQueue::setStreamSlot(const List<camera_metadata_t*> &bufs) {
	if (mStreamSlotCount > 0) {
	freeBuffers(mStreamSlot.begin(), mStreamSlot.end());
	}
	mStreamSlot = bufs;
	mStreamSlotCount = mStreamSlot.size();

	return OK;
	}

	status_t MetadataQueue::freeBuffers(List<camera_metadata_t*>::iterator start,
	List<camera_metadata_t*>::iterator end) {
	while (start != end) {
	free_camera_metadata(*start);
	start = mStreamSlot.erase(start);
	}
	return OK;
	}

	MetadataQueue* MetadataQueue::getInstance(
	const camera2_request_queue_src_ops_t *q) {
	const MetadataQueue* cmq = static_cast<const MetadataQueue*>(q);
	return const_cast<MetadataQueue*>(cmq);
	}

	MetadataQueue* MetadataQueue::getInstance(
	const camera2_frame_queue_dst_ops_t *q) {
	const MetadataQueue* cmq = static_cast<const MetadataQueue*>(q);
	return const_cast<MetadataQueue*>(cmq);
	}

	int MetadataQueue::consumer_buffer_count(
	const camera2_request_queue_src_ops_t *q) {
	MetadataQueue *queue = getInstance(q);
	return queue->getBufferCount();
	}

	int MetadataQueue::consumer_dequeue(const camera2_request_queue_src_ops_t *q,
	camera_metadata_t **buffer) {
	MetadataQueue *queue = getInstance(q);
	return queue->dequeue(buffer, true);
	}

	int MetadataQueue::consumer_free(const camera2_request_queue_src_ops_t *q,
	camera_metadata_t *old_buffer) {
	MetadataQueue *queue = getInstance(q);
	free_camera_metadata(old_buffer);
	return OK;
	}

	int MetadataQueue::producer_dequeue(const camera2_frame_queue_dst_ops_t *q,
	size_t entries, size_t bytes,
	camera_metadata_t **buffer) {
	camera_metadata_t *new_buffer =
	allocate_camera_metadata(entries, bytes);
	if (new_buffer == NULL) return NO_MEMORY;
	*buffer = new_buffer;
	return OK;
	}

	int MetadataQueue::producer_cancel(const camera2_frame_queue_dst_ops_t *q,
	camera_metadata_t *old_buffer) {
	free_camera_metadata(old_buffer);
	return OK;
	}

	int MetadataQueue::producer_enqueue(const camera2_frame_queue_dst_ops_t *q,
	camera_metadata_t *filled_buffer) {
	MetadataQueue *queue = getInstance(q);
	return queue->enqueue(filled_buffer);
	}

	/**
	* NotifierListener
	*/

	NotifierListener::NotifierListener() {
	}

	status_t NotifierListener::getNotificationsFrom(camera2_device *dev) {
	if (!dev) return BAD_VALUE;
	status_t err;
	err = dev->ops->set_notify_callback(dev,
	notify_callback_dispatch,
	(void*)this);
	return err;
	}

	status_t NotifierListener::getNextNotification(int32_t *msg_type,
	int32_t *ext1,
	int32_t *ext2,
	int32_t *ext3) {
	Mutex::Autolock l(mMutex);
	if (mNotifications.size() == 0) return BAD_VALUE;
	return getNextNotificationLocked(msg_type, ext1, ext2, ext3);
	}

	status_t NotifierListener::waitForNotification(int32_t *msg_type,
	int32_t *ext1,
	int32_t *ext2,
	int32_t *ext3) {
	Mutex::Autolock l(mMutex);
	while (mNotifications.size() == 0) {
	mNewNotification.wait(mMutex);
	}
	return getNextNotificationLocked(msg_type, ext1, ext2, ext3);
	}

	int NotifierListener::numNotifications() {
	Mutex::Autolock l(mMutex);
	return mNotifications.size();
	}

	status_t NotifierListener::getNextNotificationLocked(int32_t *msg_type,
	int32_t *ext1,
	int32_t *ext2,
	int32_t *ext3) {
	*msg_type = mNotifications.begin()->msg_type;
	*ext1 = mNotifications.begin()->ext1;
	*ext2 = mNotifications.begin()->ext2;
	*ext3 = mNotifications.begin()->ext3;
	mNotifications.erase(mNotifications.begin());
	return OK;
	}

	void NotifierListener::onNotify(int32_t msg_type,
	int32_t ext1,
	int32_t ext2,
	int32_t ext3) {
	Mutex::Autolock l(mMutex);
	mNotifications.push_back(Notification(msg_type, ext1, ext2, ext3));
	mNewNotification.signal();
	}

	void NotifierListener::notify_callback_dispatch(int32_t msg_type,
	int32_t ext1,
	int32_t ext2,
	int32_t ext3,
	void *user) {
	NotifierListener me = reinterpret_cast<NotifierListener>(user);
	me->onNotify(msg_type, ext1, ext2, ext3);
	}

	/**
	* StreamAdapter
	*/

	#ifndef container_of
	#define container_of(ptr, type, member) \
	(type )((char)(ptr) - offsetof(type, member))
	#endif

	StreamAdapter::StreamAdapter(sp<IGraphicBufferProducer> consumer):
	mState(UNINITIALIZED), mDevice(NULL),
	mId(-1),
	mWidth(0), mHeight(0), mFormat(0)
	{
	mConsumerInterface = new SurfaceTextureClient(consumer);
	camera2_stream_ops::dequeue_buffer = dequeue_buffer;
	camera2_stream_ops::enqueue_buffer = enqueue_buffer;
	camera2_stream_ops::cancel_buffer = cancel_buffer;
	camera2_stream_ops::set_crop = set_crop;
	}

	StreamAdapter::~StreamAdapter() {
	disconnect();
	}

	status_t StreamAdapter::connectToDevice(camera2_device_t *d,
	uint32_t width, uint32_t height, int format) {
	if (mState != UNINITIALIZED) return INVALID_OPERATION;
	if (d == NULL) {
	ALOGE("%s: Null device passed to stream adapter", __FUNCTION__);
	return BAD_VALUE;
	}

	status_t res;

	mWidth = width;
	mHeight = height;
	mFormat = format;

	// Allocate device-side stream interface

	uint32_t id;
	uint32_t formatActual; // ignored
	uint32_t usage;
	uint32_t maxBuffers = 2;
	res = d->ops->allocate_stream(d,
	mWidth, mHeight, mFormat, getStreamOps(),
	&id, &formatActual, &usage, &maxBuffers);
	if (res != OK) {
	ALOGE("%s: Device stream allocation failed: %s (%d)",
	__FUNCTION__, strerror(-res), res);
	mState = UNINITIALIZED;
	return res;
	}
	mDevice = d;

	mId = id;
	mUsage = usage;
	mMaxProducerBuffers = maxBuffers;

	// Configure consumer-side ANativeWindow interface

	res = native_window_api_connect(mConsumerInterface.get(),
	NATIVE_WINDOW_API_CAMERA);
	if (res != OK) {
	ALOGE("%s: Unable to connect to native window for stream %d",
	__FUNCTION__, mId);
	mState = ALLOCATED;
	return res;
	}

	res = native_window_set_usage(mConsumerInterface.get(), mUsage);
	if (res != OK) {
	ALOGE("%s: Unable to configure usage %08x for stream %d",
	__FUNCTION__, mUsage, mId);
	mState = CONNECTED;
	return res;
	}

	res = native_window_set_buffers_geometry(mConsumerInterface.get(),
	mWidth, mHeight, mFormat);
	if (res != OK) {
	ALOGE("%s: Unable to configure buffer geometry"
	" %d x %d, format 0x%x for stream %d",
	__FUNCTION__, mWidth, mHeight, mFormat, mId);
	mState = CONNECTED;
	return res;
	}

	int maxConsumerBuffers;
	res = mConsumerInterface->query(mConsumerInterface.get(),
	NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, &maxConsumerBuffers);
	if (res != OK) {
	ALOGE("%s: Unable to query consumer undequeued"
	" buffer count for stream %d", __FUNCTION__, mId);
	mState = CONNECTED;
	return res;
	}
	mMaxConsumerBuffers = maxConsumerBuffers;

	ALOGV("%s: Producer wants %d buffers, consumer wants %d", __FUNCTION__,
	mMaxProducerBuffers, mMaxConsumerBuffers);

	int totalBuffers = mMaxConsumerBuffers + mMaxProducerBuffers;

	res = native_window_set_buffer_count(mConsumerInterface.get(),
	totalBuffers);
	if (res != OK) {
	ALOGE("%s: Unable to set buffer count for stream %d",
	__FUNCTION__, mId);
	mState = CONNECTED;
	return res;
	}

	// Register allocated buffers with HAL device
	buffer_handle_t *buffers = new buffer_handle_t[totalBuffers];
	ANativeWindowBuffer *anwBuffers = new ANativeWindowBuffer[totalBuffers];
	int bufferIdx = 0;
	for (; bufferIdx < totalBuffers; bufferIdx++) {
	res = native_window_dequeue_buffer_and_wait(mConsumerInterface.get(),
	&anwBuffers[bufferIdx]);
	if (res != OK) {
	ALOGE("%s: Unable to dequeue buffer %d for initial registration for"
	"stream %d", __FUNCTION__, bufferIdx, mId);
	mState = CONNECTED;
	goto cleanUpBuffers;
	}
	buffers[bufferIdx] = anwBuffers[bufferIdx]->handle;
	}

	res = mDevice->ops->register_stream_buffers(mDevice,
	mId,
	totalBuffers,
	buffers);
	if (res != OK) {
	ALOGE("%s: Unable to register buffers with HAL device for stream %d",
	__FUNCTION__, mId);
	mState = CONNECTED;
	} else {
	mState = ACTIVE;
	}

	cleanUpBuffers:
	for (int i = 0; i < bufferIdx; i++) {
	res = mConsumerInterface->cancelBuffer(mConsumerInterface.get(),
	anwBuffers[i], -1);
	}
	delete anwBuffers;
	delete buffers;

	return res;
	}

	status_t StreamAdapter::disconnect() {
	status_t res;
	if (mState >= ALLOCATED) {
	res = mDevice->ops->release_stream(mDevice, mId);
	if (res != OK) {
	ALOGE("%s: Unable to release stream %d",
	__FUNCTION__, mId);
	return res;
	}
	}
	if (mState >= CONNECTED) {
	res = native_window_api_disconnect(mConsumerInterface.get(),
	NATIVE_WINDOW_API_CAMERA);
	if (res != OK) {
	ALOGE("%s: Unable to disconnect stream %d from native window",
	__FUNCTION__, mId);
	return res;
	}
	}
	mId = -1;
	mState = DISCONNECTED;
	return OK;
	}

	int StreamAdapter::getId() {
	return mId;
	}

	const camera2_stream_ops *StreamAdapter::getStreamOps() {
	return static_cast<camera2_stream_ops *>(this);
	}

	ANativeWindow* StreamAdapter::toANW(const camera2_stream_ops_t *w) {
	return static_cast<const StreamAdapter*>(w)->mConsumerInterface.get();
	}

	int StreamAdapter::dequeue_buffer(const camera2_stream_ops_t *w,
	buffer_handle_t** buffer) {
	int res;
	int state = static_cast<const StreamAdapter*>(w)->mState;
	if (state != ACTIVE) {
	ALOGE("%s: Called when in bad state: %d", __FUNCTION__, state);
	return INVALID_OPERATION;
	}

	ANativeWindow *a = toANW(w);
	ANativeWindowBuffer* anb;
	res = native_window_dequeue_buffer_and_wait(a, &anb);
	if (res != OK) return res;

	*buffer = &(anb->handle);

	return res;
	}

	int StreamAdapter::enqueue_buffer(const camera2_stream_ops_t* w,
	int64_t timestamp,
	buffer_handle_t* buffer) {
	int state = static_cast<const StreamAdapter*>(w)->mState;
	if (state != ACTIVE) {
	ALOGE("%s: Called when in bad state: %d", __FUNCTION__, state);
	return INVALID_OPERATION;
	}
	ANativeWindow *a = toANW(w);
	status_t err;
	err = native_window_set_buffers_timestamp(a, timestamp);
	if (err != OK) return err;
	return a->queueBuffer(a,
	container_of(buffer, ANativeWindowBuffer, handle), -1);
	}

	int StreamAdapter::cancel_buffer(const camera2_stream_ops_t* w,
	buffer_handle_t* buffer) {
	int state = static_cast<const StreamAdapter*>(w)->mState;
	if (state != ACTIVE) {
	ALOGE("%s: Called when in bad state: %d", __FUNCTION__, state);
	return INVALID_OPERATION;
	}
	ANativeWindow *a = toANW(w);
	return a->cancelBuffer(a,
	container_of(buffer, ANativeWindowBuffer, handle), -1);
	}

	int StreamAdapter::set_crop(const camera2_stream_ops_t* w,
	int left, int top, int right, int bottom) {
	int state = static_cast<const StreamAdapter*>(w)->mState;
	if (state != ACTIVE) {
	ALOGE("%s: Called when in bad state: %d", __FUNCTION__, state);
	return INVALID_OPERATION;
	}
	ANativeWindow *a = toANW(w);
	android_native_rect_t crop = { left, top, right, bottom };
	return native_window_set_crop(a, &crop);
	}

	/**
	* FrameWaiter
	*/

	FrameWaiter::FrameWaiter():
	mPendingFrames(0) {
	}

	status_t FrameWaiter::waitForFrame(nsecs_t timeout) {
	status_t res;
	Mutex::Autolock lock(mMutex);
	while (mPendingFrames == 0) {
	res = mCondition.waitRelative(mMutex, timeout);
	if (res != OK) return res;
	}
	mPendingFrames--;
	return OK;
	}

	void FrameWaiter::onFrameAvailable() {
	Mutex::Autolock lock(mMutex);
	mPendingFrames++;
	mCondition.signal();
	}

	int HWModuleHelpers::closeModule(hw_module_t* module) {
	int status;

	if (!module) {
	return -EINVAL;
	}

	status = dlclose(module->dso);
	if (status != 0) {
	char const *err_str = dlerror();
	ALOGE("%s dlclose failed, error: %s", __func__, err_str ?: "unknown");
	}

	return status;
	}

	} // namespace tests
	} // namespace camera2
	} // namespace android