michael@0: /*
michael@0:  * Copyright (C) 2012 The Android Open Source Project
michael@0:  * Copyright (C) 2013 Mozilla Foundation
michael@0:  *
michael@0:  * Licensed under the Apache License, Version 2.0 (the "License");
michael@0:  * you may not use this file except in compliance with the License.
michael@0:  * You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing, software
michael@0:  * distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  * See the License for the specific language governing permissions and
michael@0:  * limitations under the License.
michael@0:  */
michael@0: 
michael@0: #define LOG_TAG "GonkBufferQueue"
michael@0: #define ATRACE_TAG ATRACE_TAG_GRAPHICS
michael@0: #define LOG_NDEBUG 0
michael@0: 
michael@0: #define GL_GLEXT_PROTOTYPES
michael@0: #define EGL_EGLEXT_PROTOTYPES
michael@0: 
michael@0: #include <utils/Log.h>
michael@0: 
michael@0: #include "mozilla/layers/GrallocTextureClient.h"
michael@0: #include "mozilla/layers/ImageBridgeChild.h"
michael@0: 
michael@0: #include "GonkBufferQueueJB.h"
michael@0: 
michael@0: // Macros for including the GonkBufferQueue name in log messages
michael@0: #define ST_LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)
michael@0: #define ST_LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)
michael@0: #define ST_LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
michael@0: #define ST_LOGW(...) __android_log_print(ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)
michael@0: #define ST_LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
michael@0: 
michael@0: #define ATRACE_BUFFER_INDEX(index)
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::gfx;
michael@0: using namespace mozilla::layers;
michael@0: 
michael@0: namespace android {
michael@0: 
michael@0: // Get an ID that's unique within this process.
michael@0: static int32_t createProcessUniqueId() {
michael@0:     static volatile int32_t globalCounter = 0;
michael@0:     return android_atomic_inc(&globalCounter);
michael@0: }
michael@0: 
michael@0: static const char* scalingModeName(int scalingMode) {
michael@0:     switch (scalingMode) {
michael@0:         case NATIVE_WINDOW_SCALING_MODE_FREEZE: return "FREEZE";
michael@0:         case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW: return "SCALE_TO_WINDOW";
michael@0:         case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP: return "SCALE_CROP";
michael@0:         default: return "Unknown";
michael@0:     }
michael@0: }
michael@0: 
michael@0: class nsProxyReleaseTask : public Task
michael@0: {
michael@0: public:
michael@0:     nsProxyReleaseTask(TextureClient* aClient)
michael@0:         : mTextureClient(aClient) {
michael@0:     }
michael@0: 
michael@0:     virtual void Run() MOZ_OVERRIDE
michael@0:     {
michael@0:         mTextureClient = nullptr;
michael@0:     }
michael@0: 
michael@0: private:
michael@0:     mozilla::RefPtr<TextureClient> mTextureClient;
michael@0: };
michael@0: 
michael@0: GonkBufferQueue::GonkBufferQueue(bool allowSynchronousMode,
michael@0:         const sp<IGraphicBufferAlloc>& allocator) :
michael@0:     mDefaultWidth(1),
michael@0:     mDefaultHeight(1),
michael@0:     mMaxAcquiredBufferCount(1),
michael@0:     mDefaultMaxBufferCount(2),
michael@0:     mOverrideMaxBufferCount(0),
michael@0:     mSynchronousMode(true), // GonkBufferQueue always works in sync mode.
michael@0:     mAllowSynchronousMode(allowSynchronousMode),
michael@0:     mConnectedApi(NO_CONNECTED_API),
michael@0:     mAbandoned(false),
michael@0:     mFrameCounter(0),
michael@0:     mBufferHasBeenQueued(false),
michael@0:     mDefaultBufferFormat(PIXEL_FORMAT_RGBA_8888),
michael@0:     mConsumerUsageBits(0),
michael@0:     mTransformHint(0)
michael@0: {
michael@0:     // Choose a name using the PID and a process-unique ID.
michael@0:     mConsumerName = String8::format("unnamed-%d-%d", getpid(), createProcessUniqueId());
michael@0: 
michael@0:     ST_LOGV("GonkBufferQueue");
michael@0: }
michael@0: 
michael@0: GonkBufferQueue::~GonkBufferQueue() {
michael@0:     ST_LOGV("~GonkBufferQueue");
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::setDefaultMaxBufferCountLocked(int count) {
michael@0:     if (count < 2 || count > NUM_BUFFER_SLOTS)
michael@0:         return BAD_VALUE;
michael@0: 
michael@0:     mDefaultMaxBufferCount = count;
michael@0:     mDequeueCondition.broadcast();
michael@0: 
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: bool GonkBufferQueue::isSynchronousMode() const {
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     return mSynchronousMode;
michael@0: }
michael@0: 
michael@0: void GonkBufferQueue::setConsumerName(const String8& name) {
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     mConsumerName = name;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::setDefaultBufferFormat(uint32_t defaultFormat) {
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     mDefaultBufferFormat = defaultFormat;
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::setConsumerUsageBits(uint32_t usage) {
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     mConsumerUsageBits = usage;
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::setTransformHint(uint32_t hint) {
michael@0:     ST_LOGV("setTransformHint: %02x", hint);
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     mTransformHint = hint;
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: TemporaryRef<TextureClient>
michael@0: GonkBufferQueue::getTextureClientFromBuffer(ANativeWindowBuffer* buffer)
michael@0: {
michael@0:     Mutex::Autolock _l(mMutex);
michael@0:     if (buffer == NULL) {
michael@0:         ST_LOGE("getSlotFromBufferLocked: encountered NULL buffer");
michael@0:         return nullptr;
michael@0:     }
michael@0: 
michael@0:     for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
michael@0:         if (mSlots[i].mGraphicBuffer != NULL && mSlots[i].mGraphicBuffer->handle == buffer->handle) {
michael@0:             return mSlots[i].mTextureClient;
michael@0:         }
michael@0:     }
michael@0:     ST_LOGE("getSlotFromBufferLocked: unknown buffer: %p", buffer->handle);
michael@0:     return nullptr;
michael@0: }
michael@0: 
michael@0: int GonkBufferQueue::getSlotFromTextureClientLocked(
michael@0:         TextureClient* client) const
michael@0: {
michael@0:     if (client == NULL) {
michael@0:         ST_LOGE("getSlotFromBufferLocked: encountered NULL buffer");
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0: 
michael@0:     for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
michael@0:         if (mSlots[i].mTextureClient == client) {
michael@0:             return i;
michael@0:         }
michael@0:     }
michael@0:     ST_LOGE("getSlotFromBufferLocked: unknown TextureClient: %p", client);
michael@0:     return BAD_VALUE;
michael@0: }
michael@0: 
michael@0: 
michael@0: status_t GonkBufferQueue::setBufferCount(int bufferCount) {
michael@0:     ST_LOGV("setBufferCount: count=%d", bufferCount);
michael@0: 
michael@0:     sp<ConsumerListener> listener;
michael@0:     {
michael@0:         Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:         if (mAbandoned) {
michael@0:             ST_LOGE("setBufferCount: GonkBufferQueue has been abandoned!");
michael@0:             return NO_INIT;
michael@0:         }
michael@0:         if (bufferCount > NUM_BUFFER_SLOTS) {
michael@0:             ST_LOGE("setBufferCount: bufferCount too large (max %d)",
michael@0:                     NUM_BUFFER_SLOTS);
michael@0:             return BAD_VALUE;
michael@0:         }
michael@0: 
michael@0:         // Error out if the user has dequeued buffers
michael@0:         int maxBufferCount = getMaxBufferCountLocked();
michael@0:         for (int i=0 ; i<maxBufferCount; i++) {
michael@0:             if (mSlots[i].mBufferState == BufferSlot::DEQUEUED) {
michael@0:                 ST_LOGE("setBufferCount: client owns some buffers");
michael@0:                 return -EINVAL;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         const int minBufferSlots = getMinMaxBufferCountLocked();
michael@0:         if (bufferCount == 0) {
michael@0:             mOverrideMaxBufferCount = 0;
michael@0:             mDequeueCondition.broadcast();
michael@0:             return NO_ERROR;
michael@0:         }
michael@0: 
michael@0:         if (bufferCount < minBufferSlots) {
michael@0:             ST_LOGE("setBufferCount: requested buffer count (%d) is less than "
michael@0:                     "minimum (%d)", bufferCount, minBufferSlots);
michael@0:             return BAD_VALUE;
michael@0:         }
michael@0: 
michael@0:         // here we're guaranteed that the client doesn't have dequeued buffers
michael@0:         // and will release all of its buffer references.
michael@0:         //
michael@0:         // XXX: Should this use drainQueueAndFreeBuffersLocked instead?
michael@0:         freeAllBuffersLocked();
michael@0:         mOverrideMaxBufferCount = bufferCount;
michael@0:         mBufferHasBeenQueued = false;
michael@0:         mDequeueCondition.broadcast();
michael@0:         listener = mConsumerListener;
michael@0:     } // scope for lock
michael@0: 
michael@0:     if (listener != NULL) {
michael@0:         listener->onBuffersReleased();
michael@0:     }
michael@0: 
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: int GonkBufferQueue::query(int what, int* outValue)
michael@0: {
michael@0:     Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:     if (mAbandoned) {
michael@0:         ST_LOGE("query: GonkBufferQueue has been abandoned!");
michael@0:         return NO_INIT;
michael@0:     }
michael@0: 
michael@0:     int value;
michael@0:     switch (what) {
michael@0:     case NATIVE_WINDOW_WIDTH:
michael@0:         value = mDefaultWidth;
michael@0:         break;
michael@0:     case NATIVE_WINDOW_HEIGHT:
michael@0:         value = mDefaultHeight;
michael@0:         break;
michael@0:     case NATIVE_WINDOW_FORMAT:
michael@0:         value = mDefaultBufferFormat;
michael@0:         break;
michael@0:     case NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS:
michael@0:         value = getMinUndequeuedBufferCountLocked();
michael@0:         break;
michael@0:     case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND:
michael@0:         value = (mQueue.size() >= 2);
michael@0:         break;
michael@0:     default:
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0:     outValue[0] = value;
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::requestBuffer(int slot, sp<GraphicBuffer>* buf) {
michael@0:     ST_LOGV("requestBuffer: slot=%d", slot);
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     if (mAbandoned) {
michael@0:         ST_LOGE("requestBuffer: GonkBufferQueue has been abandoned!");
michael@0:         return NO_INIT;
michael@0:     }
michael@0:     int maxBufferCount = getMaxBufferCountLocked();
michael@0:     if (slot < 0 || maxBufferCount <= slot) {
michael@0:         ST_LOGE("requestBuffer: slot index out of range [0, %d]: %d",
michael@0:                 maxBufferCount, slot);
michael@0:         return BAD_VALUE;
michael@0:     } else if (mSlots[slot].mBufferState != BufferSlot::DEQUEUED) {
michael@0:         // XXX: I vaguely recall there was some reason this can be valid, but
michael@0:         // for the life of me I can't recall under what circumstances that's
michael@0:         // the case.
michael@0:         ST_LOGE("requestBuffer: slot %d is not owned by the client (state=%d)",
michael@0:                 slot, mSlots[slot].mBufferState);
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0:     mSlots[slot].mRequestBufferCalled = true;
michael@0:     *buf = mSlots[slot].mGraphicBuffer;
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::dequeueBuffer(int *outBuf, sp<Fence>* outFence,
michael@0:         uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
michael@0:     ST_LOGV("dequeueBuffer: w=%d h=%d fmt=%#x usage=%#x", w, h, format, usage);
michael@0: 
michael@0:     if ((w && !h) || (!w && h)) {
michael@0:         ST_LOGE("dequeueBuffer: invalid size: w=%u, h=%u", w, h);
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0: 
michael@0:     status_t returnFlags(OK);
michael@0:     int buf = INVALID_BUFFER_SLOT;
michael@0: 
michael@0:     { // Scope for the lock
michael@0:         Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:         if (format == 0) {
michael@0:             format = mDefaultBufferFormat;
michael@0:         }
michael@0:         // turn on usage bits the consumer requested
michael@0:         usage |= mConsumerUsageBits;
michael@0: 
michael@0:         int found = -1;
michael@0:         int dequeuedCount = 0;
michael@0:         bool tryAgain = true;
michael@0:         while (tryAgain) {
michael@0:             if (mAbandoned) {
michael@0:                 ST_LOGE("dequeueBuffer: GonkBufferQueue has been abandoned!");
michael@0:                 return NO_INIT;
michael@0:             }
michael@0: 
michael@0:             const int maxBufferCount = getMaxBufferCountLocked();
michael@0: 
michael@0:             // Free up any buffers that are in slots beyond the max buffer
michael@0:             // count.
michael@0:             //for (int i = maxBufferCount; i < NUM_BUFFER_SLOTS; i++) {
michael@0:             //    assert(mSlots[i].mBufferState == BufferSlot::FREE);
michael@0:             //    if (mSlots[i].mGraphicBuffer != NULL) {
michael@0:             //        freeBufferLocked(i);
michael@0:             //        returnFlags |= IGraphicBufferProducer::RELEASE_ALL_BUFFERS;
michael@0:             //    }
michael@0:             //}
michael@0: 
michael@0:             // look for a free buffer to give to the client
michael@0:             found = INVALID_BUFFER_SLOT;
michael@0:             dequeuedCount = 0;
michael@0:             for (int i = 0; i < maxBufferCount; i++) {
michael@0:                 const int state = mSlots[i].mBufferState;
michael@0:                 if (state == BufferSlot::DEQUEUED) {
michael@0:                     dequeuedCount++;
michael@0:                 }
michael@0: 
michael@0:                 if (state == BufferSlot::FREE) {
michael@0:                     /* We return the oldest of the free buffers to avoid
michael@0:                      * stalling the producer if possible.  This is because
michael@0:                      * the consumer may still have pending reads of the
michael@0:                      * buffers in flight.
michael@0:                      */
michael@0:                     if ((found < 0) ||
michael@0:                             mSlots[i].mFrameNumber < mSlots[found].mFrameNumber) {
michael@0:                         found = i;
michael@0:                     }
michael@0:                 }
michael@0:             }
michael@0: 
michael@0:             // clients are not allowed to dequeue more than one buffer
michael@0:             // if they didn't set a buffer count.
michael@0:             if (!mOverrideMaxBufferCount && dequeuedCount) {
michael@0:                 ST_LOGE("dequeueBuffer: can't dequeue multiple buffers without "
michael@0:                         "setting the buffer count");
michael@0:                 return -EINVAL;
michael@0:             }
michael@0: 
michael@0:             // See whether a buffer has been queued since the last
michael@0:             // setBufferCount so we know whether to perform the min undequeued
michael@0:             // buffers check below.
michael@0:             if (mBufferHasBeenQueued) {
michael@0:                 // make sure the client is not trying to dequeue more buffers
michael@0:                 // than allowed.
michael@0:                 const int newUndequeuedCount = maxBufferCount - (dequeuedCount+1);
michael@0:                 const int minUndequeuedCount = getMinUndequeuedBufferCountLocked();
michael@0:                 if (newUndequeuedCount < minUndequeuedCount) {
michael@0:                     ST_LOGE("dequeueBuffer: min undequeued buffer count (%d) "
michael@0:                             "exceeded (dequeued=%d undequeudCount=%d)",
michael@0:                             minUndequeuedCount, dequeuedCount,
michael@0:                             newUndequeuedCount);
michael@0:                     return -EBUSY;
michael@0:                 }
michael@0:             }
michael@0: 
michael@0:             // If no buffer is found, wait for a buffer to be released or for
michael@0:             // the max buffer count to change.
michael@0:             tryAgain = found == INVALID_BUFFER_SLOT;
michael@0:             if (tryAgain) {
michael@0:                 mDequeueCondition.wait(mMutex);
michael@0:             }
michael@0:         }
michael@0: 
michael@0: 
michael@0:         if (found == INVALID_BUFFER_SLOT) {
michael@0:             // This should not happen.
michael@0:             ST_LOGE("dequeueBuffer: no available buffer slots");
michael@0:             return -EBUSY;
michael@0:         }
michael@0: 
michael@0:         buf = found;
michael@0:         *outBuf = found;
michael@0: 
michael@0:         const bool useDefaultSize = !w && !h;
michael@0:         if (useDefaultSize) {
michael@0:             // use the default size
michael@0:             w = mDefaultWidth;
michael@0:             h = mDefaultHeight;
michael@0:         }
michael@0: 
michael@0:         mSlots[buf].mBufferState = BufferSlot::DEQUEUED;
michael@0: 
michael@0:         const sp<GraphicBuffer>& buffer(mSlots[buf].mGraphicBuffer);
michael@0:         if ((buffer == NULL) ||
michael@0:             (uint32_t(buffer->width)  != w) ||
michael@0:             (uint32_t(buffer->height) != h) ||
michael@0:             (uint32_t(buffer->format) != format) ||
michael@0:             ((uint32_t(buffer->usage) & usage) != usage))
michael@0:         {
michael@0:             mSlots[buf].mAcquireCalled = false;
michael@0:             mSlots[buf].mGraphicBuffer = NULL;
michael@0:             mSlots[buf].mRequestBufferCalled = false;
michael@0:             mSlots[buf].mFence = Fence::NO_FENCE;
michael@0:             if (mSlots[buf].mTextureClient) {
michael@0:               mSlots[buf].mTextureClient->ClearRecycleCallback();
michael@0:               // release TextureClient in ImageBridge thread
michael@0:               nsProxyReleaseTask* task = new nsProxyReleaseTask(mSlots[buf].mTextureClient);
michael@0:               mSlots[buf].mTextureClient = NULL;
michael@0:               ImageBridgeChild::GetSingleton()->GetMessageLoop()->PostTask(FROM_HERE, task);
michael@0:             }
michael@0:             returnFlags |= IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION;
michael@0:         }
michael@0: 
michael@0:         *outFence = mSlots[buf].mFence;
michael@0:         mSlots[buf].mFence = Fence::NO_FENCE;
michael@0:     }  // end lock scope
michael@0: 
michael@0:     sp<GraphicBuffer> graphicBuffer;
michael@0:     if (returnFlags & IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION) {
michael@0:         RefPtr<GrallocTextureClientOGL> textureClient =
michael@0:             new GrallocTextureClientOGL(ImageBridgeChild::GetSingleton(),
michael@0:                                         gfx::SurfaceFormat::UNKNOWN,
michael@0:                                         gfx::BackendType::NONE,
michael@0:                                         TEXTURE_DEALLOCATE_CLIENT);
michael@0:         usage |= GraphicBuffer::USAGE_HW_TEXTURE;
michael@0:         bool result = textureClient->AllocateGralloc(IntSize(w, h), format, usage);
michael@0:         sp<GraphicBuffer> graphicBuffer = textureClient->GetGraphicBuffer();
michael@0:         if (!result || !graphicBuffer.get()) {
michael@0:             ST_LOGE("dequeueBuffer: failed to alloc gralloc buffer");
michael@0:             return -ENOMEM;
michael@0:         }
michael@0: 
michael@0:         { // Scope for the lock
michael@0:             Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:             if (mAbandoned) {
michael@0:                 ST_LOGE("dequeueBuffer: SurfaceTexture has been abandoned!");
michael@0:                 return NO_INIT;
michael@0:             }
michael@0: 
michael@0:             mSlots[buf].mGraphicBuffer = graphicBuffer;
michael@0:             mSlots[buf].mTextureClient = textureClient;
michael@0:             ST_LOGD("dequeueBuffer: returning slot=%d buf=%p ", buf,
michael@0:                     mSlots[buf].mGraphicBuffer->handle);
michael@0:             //mSlots[*outBuf].mGraphicBuffer = graphicBuffer;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     ST_LOGV("dequeueBuffer: returning slot=%d buf=%p flags=%#x", *outBuf,
michael@0:             mSlots[*outBuf].mGraphicBuffer->handle, returnFlags);
michael@0: 
michael@0:     return returnFlags;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::setSynchronousMode(bool enabled) {
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::queueBuffer(int buf,
michael@0:         const QueueBufferInput& input, QueueBufferOutput* output) {
michael@0: 
michael@0:     Rect crop;
michael@0:     uint32_t transform;
michael@0:     int scalingMode;
michael@0:     int64_t timestamp;
michael@0:     sp<Fence> fence;
michael@0: 
michael@0:     input.deflate(&timestamp, &crop, &scalingMode, &transform, &fence);
michael@0: 
michael@0: #if ANDROID_VERSION >= 18
michael@0:     if (fence == NULL) {
michael@0:         ST_LOGE("queueBuffer: fence is NULL");
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     ST_LOGV("queueBuffer: slot=%d time=%#llx crop=[%d,%d,%d,%d] tr=%#x "
michael@0:             "scale=%s",
michael@0:             buf, timestamp, crop.left, crop.top, crop.right, crop.bottom,
michael@0:             transform, scalingModeName(scalingMode));
michael@0: 
michael@0:     sp<ConsumerListener> listener;
michael@0: 
michael@0:     { // scope for the lock
michael@0:         Mutex::Autolock lock(mMutex);
michael@0:         if (mAbandoned) {
michael@0:             ST_LOGE("queueBuffer: GonkBufferQueue has been abandoned!");
michael@0:             return NO_INIT;
michael@0:         }
michael@0:         int maxBufferCount = getMaxBufferCountLocked();
michael@0:         if (buf < 0 || buf >= maxBufferCount) {
michael@0:             ST_LOGE("queueBuffer: slot index out of range [0, %d]: %d",
michael@0:                     maxBufferCount, buf);
michael@0:             return -EINVAL;
michael@0:         } else if (mSlots[buf].mBufferState != BufferSlot::DEQUEUED) {
michael@0:             ST_LOGE("queueBuffer: slot %d is not owned by the client "
michael@0:                     "(state=%d)", buf, mSlots[buf].mBufferState);
michael@0:             return -EINVAL;
michael@0:         } else if (!mSlots[buf].mRequestBufferCalled) {
michael@0:             ST_LOGE("queueBuffer: slot %d was enqueued without requesting a "
michael@0:                     "buffer", buf);
michael@0:             return -EINVAL;
michael@0:         }
michael@0: 
michael@0:         const sp<GraphicBuffer>& graphicBuffer(mSlots[buf].mGraphicBuffer);
michael@0:         Rect bufferRect(graphicBuffer->getWidth(), graphicBuffer->getHeight());
michael@0:         Rect croppedCrop;
michael@0:         crop.intersect(bufferRect, &croppedCrop);
michael@0:         if (croppedCrop != crop) {
michael@0:             ST_LOGE("queueBuffer: crop rect is not contained within the "
michael@0:                     "buffer in slot %d", buf);
michael@0:             return -EINVAL;
michael@0:         }
michael@0: 
michael@0:         if (mSynchronousMode) {
michael@0:             // In synchronous mode we queue all buffers in a FIFO.
michael@0:             mQueue.push_back(buf);
michael@0: 
michael@0:             // Synchronous mode always signals that an additional frame should
michael@0:             // be consumed.
michael@0:             listener = mConsumerListener;
michael@0:         } else {
michael@0:             // In asynchronous mode we only keep the most recent buffer.
michael@0:             if (mQueue.empty()) {
michael@0:                 mQueue.push_back(buf);
michael@0: 
michael@0:                 // Asynchronous mode only signals that a frame should be
michael@0:                 // consumed if no previous frame was pending. If a frame were
michael@0:                 // pending then the consumer would have already been notified.
michael@0:                 listener = mConsumerListener;
michael@0:             } else {
michael@0:                 Fifo::iterator front(mQueue.begin());
michael@0:                 // buffer currently queued is freed
michael@0:                 mSlots[*front].mBufferState = BufferSlot::FREE;
michael@0:                 // and we record the new buffer index in the queued list
michael@0:                 *front = buf;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         mSlots[buf].mTimestamp = timestamp;
michael@0:         mSlots[buf].mCrop = crop;
michael@0:         mSlots[buf].mTransform = transform;
michael@0:         mSlots[buf].mFence = fence;
michael@0: 
michael@0:         switch (scalingMode) {
michael@0:             case NATIVE_WINDOW_SCALING_MODE_FREEZE:
michael@0:             case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
michael@0:             case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
michael@0:                 break;
michael@0:             default:
michael@0:                 ST_LOGE("unknown scaling mode: %d (ignoring)", scalingMode);
michael@0:                 scalingMode = mSlots[buf].mScalingMode;
michael@0:                 break;
michael@0:         }
michael@0: 
michael@0:         mSlots[buf].mBufferState = BufferSlot::QUEUED;
michael@0:         mSlots[buf].mScalingMode = scalingMode;
michael@0:         mFrameCounter++;
michael@0:         mSlots[buf].mFrameNumber = mFrameCounter;
michael@0: 
michael@0:         mBufferHasBeenQueued = true;
michael@0:         mDequeueCondition.broadcast();
michael@0: 
michael@0:         output->inflate(mDefaultWidth, mDefaultHeight, mTransformHint,
michael@0:                 mQueue.size());
michael@0:     } // scope for the lock
michael@0: 
michael@0:     // call back without lock held
michael@0:     if (listener != 0) {
michael@0:         listener->onFrameAvailable();
michael@0:     }
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: #if ANDROID_VERSION == 17
michael@0: void GonkBufferQueue::cancelBuffer(int buf, sp<Fence> fence) {
michael@0: #else
michael@0: void GonkBufferQueue::cancelBuffer(int buf, const sp<Fence>& fence) {
michael@0: #endif
michael@0: 
michael@0:     ST_LOGV("cancelBuffer: slot=%d", buf);
michael@0:     Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:     if (mAbandoned) {
michael@0:         ST_LOGW("cancelBuffer: GonkBufferQueue has been abandoned!");
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     int maxBufferCount = getMaxBufferCountLocked();
michael@0:     if (buf < 0 || buf >= maxBufferCount) {
michael@0:         ST_LOGE("cancelBuffer: slot index out of range [0, %d]: %d",
michael@0:                 maxBufferCount, buf);
michael@0:         return;
michael@0:     } else if (mSlots[buf].mBufferState != BufferSlot::DEQUEUED) {
michael@0:         ST_LOGE("cancelBuffer: slot %d is not owned by the client (state=%d)",
michael@0:                 buf, mSlots[buf].mBufferState);
michael@0:         return;
michael@0: #if ANDROID_VERSION >= 18
michael@0:     } else if (fence == NULL) {
michael@0:         ST_LOGE("cancelBuffer: fence is NULL");
michael@0:         return;
michael@0: #endif
michael@0:     }
michael@0:     mSlots[buf].mBufferState = BufferSlot::FREE;
michael@0:     mSlots[buf].mFrameNumber = 0;
michael@0:     mSlots[buf].mFence = fence;
michael@0:     mDequeueCondition.broadcast();
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::connect(int api, QueueBufferOutput* output) {
michael@0:     ST_LOGV("connect: api=%d", api);
michael@0:     Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:     if (mAbandoned) {
michael@0:         ST_LOGE("connect: GonkBufferQueue has been abandoned!");
michael@0:         return NO_INIT;
michael@0:     }
michael@0: 
michael@0:     if (mConsumerListener == NULL) {
michael@0:         ST_LOGE("connect: GonkBufferQueue has no consumer!");
michael@0:         return NO_INIT;
michael@0:     }
michael@0: 
michael@0:     int err = NO_ERROR;
michael@0:     switch (api) {
michael@0:         case NATIVE_WINDOW_API_EGL:
michael@0:         case NATIVE_WINDOW_API_CPU:
michael@0:         case NATIVE_WINDOW_API_MEDIA:
michael@0:         case NATIVE_WINDOW_API_CAMERA:
michael@0:             if (mConnectedApi != NO_CONNECTED_API) {
michael@0:                 ST_LOGE("connect: already connected (cur=%d, req=%d)",
michael@0:                         mConnectedApi, api);
michael@0:                 err = -EINVAL;
michael@0:             } else {
michael@0:                 mConnectedApi = api;
michael@0:                 output->inflate(mDefaultWidth, mDefaultHeight, mTransformHint,
michael@0:                         mQueue.size());
michael@0:             }
michael@0:             break;
michael@0:         default:
michael@0:             err = -EINVAL;
michael@0:             break;
michael@0:     }
michael@0: 
michael@0:     mBufferHasBeenQueued = false;
michael@0: 
michael@0:     return err;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::disconnect(int api) {
michael@0:     ST_LOGV("disconnect: api=%d", api);
michael@0: 
michael@0:     int err = NO_ERROR;
michael@0:     sp<ConsumerListener> listener;
michael@0: 
michael@0:     { // Scope for the lock
michael@0:         Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:         if (mAbandoned) {
michael@0:             // it is not really an error to disconnect after the surface
michael@0:             // has been abandoned, it should just be a no-op.
michael@0:             return NO_ERROR;
michael@0:         }
michael@0: 
michael@0:         switch (api) {
michael@0:             case NATIVE_WINDOW_API_EGL:
michael@0:             case NATIVE_WINDOW_API_CPU:
michael@0:             case NATIVE_WINDOW_API_MEDIA:
michael@0:             case NATIVE_WINDOW_API_CAMERA:
michael@0:                 if (mConnectedApi == api) {
michael@0:                     freeAllBuffersLocked();
michael@0:                     mConnectedApi = NO_CONNECTED_API;
michael@0:                     mDequeueCondition.broadcast();
michael@0:                     listener = mConsumerListener;
michael@0:                 } else {
michael@0:                     ST_LOGE("disconnect: connected to another api (cur=%d, req=%d)",
michael@0:                             mConnectedApi, api);
michael@0:                     err = -EINVAL;
michael@0:                 }
michael@0:                 break;
michael@0:             default:
michael@0:                 ST_LOGE("disconnect: unknown API %d", api);
michael@0:                 err = -EINVAL;
michael@0:                 break;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (listener != NULL) {
michael@0:         listener->onBuffersReleased();
michael@0:     }
michael@0: 
michael@0:     return err;
michael@0: }
michael@0: 
michael@0: void GonkBufferQueue::dump(String8& result) const
michael@0: {
michael@0:     char buffer[1024];
michael@0:     GonkBufferQueue::dump(result, "", buffer, 1024);
michael@0: }
michael@0: 
michael@0: void GonkBufferQueue::dump(String8& result, const char* prefix,
michael@0:         char* buffer, size_t SIZE) const
michael@0: {
michael@0:     Mutex::Autolock _l(mMutex);
michael@0: 
michael@0:     String8 fifo;
michael@0:     int fifoSize = 0;
michael@0:     Fifo::const_iterator i(mQueue.begin());
michael@0:     while (i != mQueue.end()) {
michael@0:        snprintf(buffer, SIZE, "%02d ", *i++);
michael@0:        fifoSize++;
michael@0:        fifo.append(buffer);
michael@0:     }
michael@0: 
michael@0:     int maxBufferCount = getMaxBufferCountLocked();
michael@0: 
michael@0:     snprintf(buffer, SIZE,
michael@0:             "%s-BufferQueue maxBufferCount=%d, mSynchronousMode=%d, default-size=[%dx%d], "
michael@0:             "default-format=%d, transform-hint=%02x, FIFO(%d)={%s}\n",
michael@0:             prefix, maxBufferCount, mSynchronousMode, mDefaultWidth,
michael@0:             mDefaultHeight, mDefaultBufferFormat, mTransformHint,
michael@0:             fifoSize, fifo.string());
michael@0:     result.append(buffer);
michael@0: 
michael@0: 
michael@0:     struct {
michael@0:         const char * operator()(int state) const {
michael@0:             switch (state) {
michael@0:                 case BufferSlot::DEQUEUED: return "DEQUEUED";
michael@0:                 case BufferSlot::QUEUED: return "QUEUED";
michael@0:                 case BufferSlot::FREE: return "FREE";
michael@0:                 case BufferSlot::ACQUIRED: return "ACQUIRED";
michael@0:                 default: return "Unknown";
michael@0:             }
michael@0:         }
michael@0:     } stateName;
michael@0: 
michael@0:     for (int i=0 ; i<maxBufferCount ; i++) {
michael@0:         const BufferSlot& slot(mSlots[i]);
michael@0:         snprintf(buffer, SIZE,
michael@0:                 "%s%s[%02d] "
michael@0:                 "state=%-8s, crop=[%d,%d,%d,%d], "
michael@0:                 "xform=0x%02x, time=%#llx, scale=%s",
michael@0:                 prefix, (slot.mBufferState == BufferSlot::ACQUIRED)?">":" ", i,
michael@0:                 stateName(slot.mBufferState),
michael@0:                 slot.mCrop.left, slot.mCrop.top, slot.mCrop.right,
michael@0:                 slot.mCrop.bottom, slot.mTransform, slot.mTimestamp,
michael@0:                 scalingModeName(slot.mScalingMode)
michael@0:         );
michael@0:         result.append(buffer);
michael@0: 
michael@0:         const sp<GraphicBuffer>& buf(slot.mGraphicBuffer);
michael@0:         if (buf != NULL) {
michael@0:             snprintf(buffer, SIZE,
michael@0:                     ", %p [%4ux%4u:%4u,%3X]",
michael@0:                     buf->handle, buf->width, buf->height, buf->stride,
michael@0:                     buf->format);
michael@0:             result.append(buffer);
michael@0:         }
michael@0:         result.append("\n");
michael@0:     }
michael@0: }
michael@0: 
michael@0: void GonkBufferQueue::freeAllBuffersLocked()
michael@0: {
michael@0:     ALOGW_IF(!mQueue.isEmpty(),
michael@0:             "freeAllBuffersLocked called but mQueue is not empty");
michael@0:     mQueue.clear();
michael@0:     mBufferHasBeenQueued = false;
michael@0:     for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
michael@0:         mSlots[i].mGraphicBuffer = 0;
michael@0:         if (mSlots[i].mTextureClient) {
michael@0:           mSlots[i].mTextureClient->ClearRecycleCallback();
michael@0:           // release TextureClient in ImageBridge thread
michael@0:           nsProxyReleaseTask* task = new nsProxyReleaseTask(mSlots[i].mTextureClient);
michael@0:           mSlots[i].mTextureClient = NULL;
michael@0:           ImageBridgeChild::GetSingleton()->GetMessageLoop()->PostTask(FROM_HERE, task);
michael@0:         }
michael@0:         if (mSlots[i].mBufferState == BufferSlot::ACQUIRED) {
michael@0:             mSlots[i].mNeedsCleanupOnRelease = true;
michael@0:         }
michael@0:         mSlots[i].mBufferState = BufferSlot::FREE;
michael@0:         mSlots[i].mFrameNumber = 0;
michael@0:         mSlots[i].mAcquireCalled = false;
michael@0:         // destroy fence as GonkBufferQueue now takes ownership
michael@0:         mSlots[i].mFence = Fence::NO_FENCE;
michael@0:     }
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::acquireBuffer(BufferItem *buffer) {
michael@0:     Mutex::Autolock _l(mMutex);
michael@0: 
michael@0:     // Check that the consumer doesn't currently have the maximum number of
michael@0:     // buffers acquired.  We allow the max buffer count to be exceeded by one
michael@0:     // buffer, so that the consumer can successfully set up the newly acquired
michael@0:     // buffer before releasing the old one.
michael@0:     int numAcquiredBuffers = 0;
michael@0:     for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
michael@0:         if (mSlots[i].mBufferState == BufferSlot::ACQUIRED) {
michael@0:             numAcquiredBuffers++;
michael@0:         }
michael@0:     }
michael@0:     if (numAcquiredBuffers >= mMaxAcquiredBufferCount+1) {
michael@0:         ST_LOGE("acquireBuffer: max acquired buffer count reached: %d (max=%d)",
michael@0:                 numAcquiredBuffers, mMaxAcquiredBufferCount);
michael@0:         return INVALID_OPERATION;
michael@0:     }
michael@0: 
michael@0:     // check if queue is empty
michael@0:     // In asynchronous mode the list is guaranteed to be one buffer
michael@0:     // deep, while in synchronous mode we use the oldest buffer.
michael@0:     if (!mQueue.empty()) {
michael@0:         Fifo::iterator front(mQueue.begin());
michael@0:         int buf = *front;
michael@0: 
michael@0:         // In android, when the buffer is aquired by BufferConsumer,
michael@0:         // BufferQueue releases a reference to the buffer and
michael@0:         // it's ownership moves to the BufferConsumer.
michael@0:         // In b2g, GonkBufferQueue continues to have a buffer ownership.
michael@0:         // It is necessary to free buffer via ImageBridgeChild.
michael@0: 
michael@0:         //if (mSlots[buf].mAcquireCalled) {
michael@0:         //    buffer->mGraphicBuffer = NULL;
michael@0:         //} else {
michael@0:         //    buffer->mGraphicBuffer = mSlots[buf].mGraphicBuffer;
michael@0:         //}
michael@0:         buffer->mGraphicBuffer = mSlots[buf].mGraphicBuffer;
michael@0:         buffer->mCrop = mSlots[buf].mCrop;
michael@0:         buffer->mTransform = mSlots[buf].mTransform;
michael@0:         buffer->mScalingMode = mSlots[buf].mScalingMode;
michael@0:         buffer->mFrameNumber = mSlots[buf].mFrameNumber;
michael@0:         buffer->mTimestamp = mSlots[buf].mTimestamp;
michael@0:         buffer->mBuf = buf;
michael@0:         buffer->mFence = mSlots[buf].mFence;
michael@0: 
michael@0:         mSlots[buf].mAcquireCalled = true;
michael@0:         mSlots[buf].mNeedsCleanupOnRelease = false;
michael@0:         mSlots[buf].mBufferState = BufferSlot::ACQUIRED;
michael@0:         mSlots[buf].mFence = Fence::NO_FENCE;
michael@0: 
michael@0:         mQueue.erase(front);
michael@0:         mDequeueCondition.broadcast();
michael@0:     } else {
michael@0:         return NO_BUFFER_AVAILABLE;
michael@0:     }
michael@0: 
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::releaseBuffer(int buf, const sp<Fence>& fence) {
michael@0:     Mutex::Autolock _l(mMutex);
michael@0: 
michael@0: #if ANDROID_VERSION == 17
michael@0:     if (buf == INVALID_BUFFER_SLOT) {
michael@0: #else
michael@0:     if (buf == INVALID_BUFFER_SLOT || fence == NULL) {
michael@0: #endif
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0: 
michael@0:     mSlots[buf].mFence = fence;
michael@0: 
michael@0:     // The buffer can now only be released if its in the acquired state
michael@0:     if (mSlots[buf].mBufferState == BufferSlot::ACQUIRED) {
michael@0:         mSlots[buf].mBufferState = BufferSlot::FREE;
michael@0:     } else if (mSlots[buf].mNeedsCleanupOnRelease) {
michael@0:         ST_LOGV("releasing a stale buf %d its state was %d", buf, mSlots[buf].mBufferState);
michael@0:         mSlots[buf].mNeedsCleanupOnRelease = false;
michael@0:         return STALE_BUFFER_SLOT;
michael@0:     } else {
michael@0:         ST_LOGE("attempted to release buf %d but its state was %d", buf, mSlots[buf].mBufferState);
michael@0:         return -EINVAL;
michael@0:     }
michael@0: 
michael@0:     mDequeueCondition.broadcast();
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::consumerConnect(const sp<ConsumerListener>& consumerListener) {
michael@0:     ST_LOGV("consumerConnect");
michael@0:     Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:     if (mAbandoned) {
michael@0:         ST_LOGE("consumerConnect: GonkBufferQueue has been abandoned!");
michael@0:         return NO_INIT;
michael@0:     }
michael@0:     if (consumerListener == NULL) {
michael@0:         ST_LOGE("consumerConnect: consumerListener may not be NULL");
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0: 
michael@0:     mConsumerListener = consumerListener;
michael@0: 
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::consumerDisconnect() {
michael@0:     ST_LOGV("consumerDisconnect");
michael@0:     Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:     if (mConsumerListener == NULL) {
michael@0:         ST_LOGE("consumerDisconnect: No consumer is connected!");
michael@0:         return -EINVAL;
michael@0:     }
michael@0: 
michael@0:     mAbandoned = true;
michael@0:     mConsumerListener = NULL;
michael@0:     mQueue.clear();
michael@0:     freeAllBuffersLocked();
michael@0:     mDequeueCondition.broadcast();
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::getReleasedBuffers(uint32_t* slotMask) {
michael@0:     ST_LOGV("getReleasedBuffers");
michael@0:     Mutex::Autolock lock(mMutex);
michael@0: 
michael@0:     if (mAbandoned) {
michael@0:         ST_LOGE("getReleasedBuffers: GonkBufferQueue has been abandoned!");
michael@0:         return NO_INIT;
michael@0:     }
michael@0: 
michael@0:     uint32_t mask = 0;
michael@0:     for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
michael@0:         if (!mSlots[i].mAcquireCalled) {
michael@0:             mask |= 1 << i;
michael@0:         }
michael@0:     }
michael@0:     *slotMask = mask;
michael@0: 
michael@0:     ST_LOGV("getReleasedBuffers: returning mask %#x", mask);
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::setDefaultBufferSize(uint32_t w, uint32_t h)
michael@0: {
michael@0:     ST_LOGV("setDefaultBufferSize: w=%d, h=%d", w, h);
michael@0:     if (!w || !h) {
michael@0:         ST_LOGE("setDefaultBufferSize: dimensions cannot be 0 (w=%d, h=%d)",
michael@0:                 w, h);
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0: 
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     mDefaultWidth = w;
michael@0:     mDefaultHeight = h;
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::setDefaultMaxBufferCount(int bufferCount) {
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     return setDefaultMaxBufferCountLocked(bufferCount);
michael@0: }
michael@0: 
michael@0: status_t GonkBufferQueue::setMaxAcquiredBufferCount(int maxAcquiredBuffers) {
michael@0:     Mutex::Autolock lock(mMutex);
michael@0:     if (maxAcquiredBuffers < 1 || maxAcquiredBuffers > MAX_MAX_ACQUIRED_BUFFERS) {
michael@0:         ST_LOGE("setMaxAcquiredBufferCount: invalid count specified: %d",
michael@0:                 maxAcquiredBuffers);
michael@0:         return BAD_VALUE;
michael@0:     }
michael@0:     if (mConnectedApi != NO_CONNECTED_API) {
michael@0:         return INVALID_OPERATION;
michael@0:     }
michael@0:     mMaxAcquiredBufferCount = maxAcquiredBuffers;
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: int GonkBufferQueue::getMinMaxBufferCountLocked() const {
michael@0:     return getMinUndequeuedBufferCountLocked() + 1;
michael@0: }
michael@0: 
michael@0: int GonkBufferQueue::getMinUndequeuedBufferCountLocked() const {
michael@0:     return mSynchronousMode ? mMaxAcquiredBufferCount :
michael@0:             mMaxAcquiredBufferCount + 1;
michael@0: }
michael@0: 
michael@0: int GonkBufferQueue::getMaxBufferCountLocked() const {
michael@0:     int minMaxBufferCount = getMinMaxBufferCountLocked();
michael@0: 
michael@0:     int maxBufferCount = mDefaultMaxBufferCount;
michael@0:     if (maxBufferCount < minMaxBufferCount) {
michael@0:         maxBufferCount = minMaxBufferCount;
michael@0:     }
michael@0:     if (mOverrideMaxBufferCount != 0) {
michael@0:         assert(mOverrideMaxBufferCount >= minMaxBufferCount);
michael@0:         maxBufferCount = mOverrideMaxBufferCount;
michael@0:     }
michael@0: 
michael@0:     // Any buffers that are dequeued by the producer or sitting in the queue
michael@0:     // waiting to be consumed need to have their slots preserved.  Such
michael@0:     // buffers will temporarily keep the max buffer count up until the slots
michael@0:     // no longer need to be preserved.
michael@0:     for (int i = maxBufferCount; i < NUM_BUFFER_SLOTS; i++) {
michael@0:         BufferSlot::BufferState state = mSlots[i].mBufferState;
michael@0:         if (state == BufferSlot::QUEUED || state == BufferSlot::DEQUEUED) {
michael@0:             maxBufferCount = i + 1;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     return maxBufferCount;
michael@0: }
michael@0: 
michael@0: GonkBufferQueue::ProxyConsumerListener::ProxyConsumerListener(
michael@0:         const wp<GonkBufferQueue::ConsumerListener>& consumerListener):
michael@0:         mConsumerListener(consumerListener) {}
michael@0: 
michael@0: GonkBufferQueue::ProxyConsumerListener::~ProxyConsumerListener() {}
michael@0: 
michael@0: void GonkBufferQueue::ProxyConsumerListener::onFrameAvailable() {
michael@0:     sp<GonkBufferQueue::ConsumerListener> listener(mConsumerListener.promote());
michael@0:     if (listener != NULL) {
michael@0:         listener->onFrameAvailable();
michael@0:     }
michael@0: }
michael@0: 
michael@0: void GonkBufferQueue::ProxyConsumerListener::onBuffersReleased() {
michael@0:     sp<GonkBufferQueue::ConsumerListener> listener(mConsumerListener.promote());
michael@0:     if (listener != NULL) {
michael@0:         listener->onBuffersReleased();
michael@0:     }
michael@0: }
michael@0: 
michael@0: }; // namespace android