/* * Copyright (C) 2010 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. */ #include #define LOG_TAG "ConsumerBase" #define ATRACE_TAG ATRACE_TAG_GRAPHICS //#define LOG_NDEBUG 0 #define EGL_EGLEXT_PROTOTYPES #include #include #include #include #include #include #include #include #include #include #include // Macros for including the ConsumerBase name in log messages #define CB_LOGV(x, ...) ALOGV("[%s] "x, mName.string(), ##__VA_ARGS__) #define CB_LOGD(x, ...) ALOGD("[%s] "x, mName.string(), ##__VA_ARGS__) #define CB_LOGI(x, ...) ALOGI("[%s] "x, mName.string(), ##__VA_ARGS__) #define CB_LOGW(x, ...) ALOGW("[%s] "x, mName.string(), ##__VA_ARGS__) #define CB_LOGE(x, ...) ALOGE("[%s] "x, mName.string(), ##__VA_ARGS__) namespace android { // Get an ID that's unique within this process. static int32_t createProcessUniqueId() { static volatile int32_t globalCounter = 0; return android_atomic_inc(&globalCounter); } ConsumerBase::ConsumerBase(const sp& bufferQueue, bool controlledByApp) : mAbandoned(false), mConsumer(bufferQueue) { // Choose a name using the PID and a process-unique ID. mName = String8::format("unnamed-%d-%d", getpid(), createProcessUniqueId()); // Note that we can't create an sp<...>(this) in a ctor that will not keep a // reference once the ctor ends, as that would cause the refcount of 'this' // dropping to 0 at the end of the ctor. Since all we need is a wp<...> // that's what we create. wp listener = static_cast(this); sp proxy = new BufferQueue::ProxyConsumerListener(listener); status_t err = mConsumer->consumerConnect(proxy, controlledByApp); if (err != NO_ERROR) { CB_LOGE("ConsumerBase: error connecting to BufferQueue: %s (%d)", strerror(-err), err); } else { mConsumer->setConsumerName(mName); } } ConsumerBase::~ConsumerBase() { CB_LOGV("~ConsumerBase"); Mutex::Autolock lock(mMutex); // Verify that abandon() has been called before we get here. This should // be done by ConsumerBase::onLastStrongRef(), but it's possible for a // derived class to override that method and not call // ConsumerBase::onLastStrongRef(). LOG_ALWAYS_FATAL_IF(!mAbandoned, "[%s] ~ConsumerBase was called, but the " "consumer is not abandoned!", mName.string()); } void ConsumerBase::onLastStrongRef(const void* id __attribute__((unused))) { abandon(); } void ConsumerBase::freeBufferLocked(int slotIndex) { CB_LOGV("freeBufferLocked: slotIndex=%d", slotIndex); mSlots[slotIndex].mGraphicBuffer = 0; mSlots[slotIndex].mFence = Fence::NO_FENCE; mSlots[slotIndex].mFrameNumber = 0; } void ConsumerBase::onFrameAvailable(const BufferItem& item) { CB_LOGV("onFrameAvailable"); sp listener; { // scope for the lock Mutex::Autolock lock(mMutex); listener = mFrameAvailableListener.promote(); } if (listener != NULL) { CB_LOGV("actually calling onFrameAvailable"); listener->onFrameAvailable(item); } } void ConsumerBase::onBuffersReleased() { Mutex::Autolock lock(mMutex); CB_LOGV("onBuffersReleased"); if (mAbandoned) { // Nothing to do if we're already abandoned. return; } uint64_t mask = 0; mConsumer->getReleasedBuffers(&mask); for (int i = 0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) { if (mask & (1ULL << i)) { freeBufferLocked(i); } } } void ConsumerBase::onSidebandStreamChanged() { } void ConsumerBase::abandon() { CB_LOGV("abandon"); Mutex::Autolock lock(mMutex); if (!mAbandoned) { abandonLocked(); mAbandoned = true; } } void ConsumerBase::abandonLocked() { CB_LOGV("abandonLocked"); for (int i =0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) { freeBufferLocked(i); } // disconnect from the BufferQueue mConsumer->consumerDisconnect(); mConsumer.clear(); } void ConsumerBase::setFrameAvailableListener( const wp& listener) { CB_LOGV("setFrameAvailableListener"); Mutex::Autolock lock(mMutex); mFrameAvailableListener = listener; } void ConsumerBase::dump(String8& result) const { dump(result, ""); } void ConsumerBase::dump(String8& result, const char* prefix) const { Mutex::Autolock _l(mMutex); dumpLocked(result, prefix); } void ConsumerBase::dumpLocked(String8& result, const char* prefix) const { result.appendFormat("%smAbandoned=%d\n", prefix, int(mAbandoned)); if (!mAbandoned) { mConsumer->dump(result, prefix); } } status_t ConsumerBase::acquireBufferLocked(BufferQueue::BufferItem *item, nsecs_t presentWhen) { status_t err = mConsumer->acquireBuffer(item, presentWhen); if (err != NO_ERROR) { return err; } if (item->mGraphicBuffer != NULL) { mSlots[item->mBuf].mGraphicBuffer = item->mGraphicBuffer; } mSlots[item->mBuf].mFrameNumber = item->mFrameNumber; mSlots[item->mBuf].mFence = item->mFence; CB_LOGV("acquireBufferLocked: -> slot=%d/%" PRIu64, item->mBuf, item->mFrameNumber); return OK; } status_t ConsumerBase::addReleaseFence(int slot, const sp graphicBuffer, const sp& fence) { Mutex::Autolock lock(mMutex); return addReleaseFenceLocked(slot, graphicBuffer, fence); } status_t ConsumerBase::addReleaseFenceLocked(int slot, const sp graphicBuffer, const sp& fence) { CB_LOGV("addReleaseFenceLocked: slot=%d", slot); // If consumer no longer tracks this graphicBuffer, we can safely // drop this fence, as it will never be received by the producer. if (!stillTracking(slot, graphicBuffer)) { return OK; } if (!mSlots[slot].mFence.get()) { mSlots[slot].mFence = fence; } else { sp mergedFence = Fence::merge( String8::format("%.28s:%d", mName.string(), slot), mSlots[slot].mFence, fence); if (!mergedFence.get()) { CB_LOGE("failed to merge release fences"); // synchronization is broken, the best we can do is hope fences // signal in order so the new fence will act like a union mSlots[slot].mFence = fence; return BAD_VALUE; } mSlots[slot].mFence = mergedFence; } return OK; } status_t ConsumerBase::releaseBufferLocked( int slot, const sp graphicBuffer, EGLDisplay display, EGLSyncKHR eglFence) { // If consumer no longer tracks this graphicBuffer (we received a new // buffer on the same slot), the buffer producer is definitely no longer // tracking it. if (!stillTracking(slot, graphicBuffer)) { return OK; } CB_LOGV("releaseBufferLocked: slot=%d/%" PRIu64, slot, mSlots[slot].mFrameNumber); status_t err = mConsumer->releaseBuffer(slot, mSlots[slot].mFrameNumber, display, eglFence, mSlots[slot].mFence); if (err == IGraphicBufferConsumer::STALE_BUFFER_SLOT) { freeBufferLocked(slot); } mSlots[slot].mFence = Fence::NO_FENCE; return err; } bool ConsumerBase::stillTracking(int slot, const sp graphicBuffer) { if (slot < 0 || slot >= BufferQueue::NUM_BUFFER_SLOTS) { return false; } return (mSlots[slot].mGraphicBuffer != NULL && mSlots[slot].mGraphicBuffer->handle == graphicBuffer->handle); } } // namespace android