9de7293b0a
Adds a new method IGBP::allowAllocation, which controls whether dequeueBuffer is permitted to allocate a new buffer. If allocation is disallowed, dequeueBuffer will block or return an error as it normally would (as controlled by *ControlledByApp). If there are free buffers, but they are not of the correct dimensions, format, or usage, they may be freed if a more suitable buffer is not found first. Bug: 19801715 Change-Id: I0d604958b78b2fd775c2547690301423f9a52165
299 lines
10 KiB
C++
299 lines
10 KiB
C++
/*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "BufferQueueCore"
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#define ATRACE_TAG ATRACE_TAG_GRAPHICS
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//#define LOG_NDEBUG 0
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#define EGL_EGLEXT_PROTOTYPES
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#include <inttypes.h>
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#include <gui/BufferItem.h>
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#include <gui/BufferQueueCore.h>
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#include <gui/IConsumerListener.h>
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#include <gui/IGraphicBufferAlloc.h>
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#include <gui/IProducerListener.h>
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#include <gui/ISurfaceComposer.h>
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#include <private/gui/ComposerService.h>
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template <typename T>
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static inline T max(T a, T b) { return a > b ? a : b; }
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namespace android {
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static String8 getUniqueName() {
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static volatile int32_t counter = 0;
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return String8::format("unnamed-%d-%d", getpid(),
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android_atomic_inc(&counter));
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}
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BufferQueueCore::BufferQueueCore(const sp<IGraphicBufferAlloc>& allocator) :
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mAllocator(allocator),
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mMutex(),
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mIsAbandoned(false),
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mConsumerControlledByApp(false),
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mConsumerName(getUniqueName()),
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mConsumerListener(),
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mConsumerUsageBits(0),
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mConnectedApi(NO_CONNECTED_API),
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mConnectedProducerListener(),
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mSlots(),
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mQueue(),
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mFreeSlots(),
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mFreeBuffers(),
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mOverrideMaxBufferCount(0),
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mDequeueCondition(),
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mUseAsyncBuffer(true),
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mDequeueBufferCannotBlock(false),
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mDefaultBufferFormat(PIXEL_FORMAT_RGBA_8888),
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mDefaultWidth(1),
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mDefaultHeight(1),
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mDefaultBufferDataSpace(HAL_DATASPACE_UNKNOWN),
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mDefaultMaxBufferCount(2),
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mMaxAcquiredBufferCount(1),
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mBufferHasBeenQueued(false),
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mFrameCounter(0),
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mTransformHint(0),
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mIsAllocating(false),
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mIsAllocatingCondition(),
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mAllowAllocation(true)
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{
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if (allocator == NULL) {
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sp<ISurfaceComposer> composer(ComposerService::getComposerService());
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mAllocator = composer->createGraphicBufferAlloc();
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if (mAllocator == NULL) {
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BQ_LOGE("createGraphicBufferAlloc failed");
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}
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}
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for (int slot = 0; slot < BufferQueueDefs::NUM_BUFFER_SLOTS; ++slot) {
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mFreeSlots.insert(slot);
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}
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}
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BufferQueueCore::~BufferQueueCore() {}
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void BufferQueueCore::dump(String8& result, const char* prefix) const {
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Mutex::Autolock lock(mMutex);
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String8 fifo;
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Fifo::const_iterator current(mQueue.begin());
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while (current != mQueue.end()) {
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fifo.appendFormat("%02d:%p crop=[%d,%d,%d,%d], "
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"xform=0x%02x, time=%#" PRIx64 ", scale=%s\n",
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current->mSlot, current->mGraphicBuffer.get(),
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current->mCrop.left, current->mCrop.top, current->mCrop.right,
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current->mCrop.bottom, current->mTransform, current->mTimestamp,
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BufferItem::scalingModeName(current->mScalingMode));
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++current;
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}
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result.appendFormat("%s-BufferQueue mMaxAcquiredBufferCount=%d, "
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"mDequeueBufferCannotBlock=%d, default-size=[%dx%d], "
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"default-format=%d, transform-hint=%02x, FIFO(%zu)={%s}\n",
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prefix, mMaxAcquiredBufferCount, mDequeueBufferCannotBlock,
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mDefaultWidth, mDefaultHeight, mDefaultBufferFormat, mTransformHint,
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mQueue.size(), fifo.string());
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// Trim the free buffers so as to not spam the dump
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int maxBufferCount = 0;
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for (int s = BufferQueueDefs::NUM_BUFFER_SLOTS - 1; s >= 0; --s) {
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const BufferSlot& slot(mSlots[s]);
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if (slot.mBufferState != BufferSlot::FREE ||
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slot.mGraphicBuffer != NULL) {
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maxBufferCount = s + 1;
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break;
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}
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}
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for (int s = 0; s < maxBufferCount; ++s) {
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const BufferSlot& slot(mSlots[s]);
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const sp<GraphicBuffer>& buffer(slot.mGraphicBuffer);
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result.appendFormat("%s%s[%02d:%p] state=%-8s", prefix,
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(slot.mBufferState == BufferSlot::ACQUIRED) ? ">" : " ",
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s, buffer.get(),
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BufferSlot::bufferStateName(slot.mBufferState));
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if (buffer != NULL) {
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result.appendFormat(", %p [%4ux%4u:%4u,%3X]", buffer->handle,
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buffer->width, buffer->height, buffer->stride,
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buffer->format);
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}
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result.append("\n");
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}
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}
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int BufferQueueCore::getMinUndequeuedBufferCountLocked(bool async) const {
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// If dequeueBuffer is allowed to error out, we don't have to add an
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// extra buffer.
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if (!mUseAsyncBuffer) {
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return mMaxAcquiredBufferCount;
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}
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if (mDequeueBufferCannotBlock || async) {
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return mMaxAcquiredBufferCount + 1;
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}
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return mMaxAcquiredBufferCount;
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}
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int BufferQueueCore::getMinMaxBufferCountLocked(bool async) const {
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return getMinUndequeuedBufferCountLocked(async) + 1;
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}
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int BufferQueueCore::getMaxBufferCountLocked(bool async) const {
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int minMaxBufferCount = getMinMaxBufferCountLocked(async);
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int maxBufferCount = max(mDefaultMaxBufferCount, minMaxBufferCount);
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if (mOverrideMaxBufferCount != 0) {
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assert(mOverrideMaxBufferCount >= minMaxBufferCount);
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maxBufferCount = mOverrideMaxBufferCount;
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}
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// Any buffers that are dequeued by the producer or sitting in the queue
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// waiting to be consumed need to have their slots preserved. Such buffers
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// will temporarily keep the max buffer count up until the slots no longer
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// need to be preserved.
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for (int s = maxBufferCount; s < BufferQueueDefs::NUM_BUFFER_SLOTS; ++s) {
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BufferSlot::BufferState state = mSlots[s].mBufferState;
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if (state == BufferSlot::QUEUED || state == BufferSlot::DEQUEUED) {
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maxBufferCount = s + 1;
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}
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}
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return maxBufferCount;
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}
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status_t BufferQueueCore::setDefaultMaxBufferCountLocked(int count) {
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const int minBufferCount = mUseAsyncBuffer ? 2 : 1;
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if (count < minBufferCount || count > BufferQueueDefs::NUM_BUFFER_SLOTS) {
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BQ_LOGV("setDefaultMaxBufferCount: invalid count %d, should be in "
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"[%d, %d]",
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count, minBufferCount, BufferQueueDefs::NUM_BUFFER_SLOTS);
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return BAD_VALUE;
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}
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BQ_LOGV("setDefaultMaxBufferCount: setting count to %d", count);
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mDefaultMaxBufferCount = count;
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mDequeueCondition.broadcast();
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return NO_ERROR;
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}
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void BufferQueueCore::freeBufferLocked(int slot) {
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BQ_LOGV("freeBufferLocked: slot %d", slot);
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bool hadBuffer = mSlots[slot].mGraphicBuffer != NULL;
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mSlots[slot].mGraphicBuffer.clear();
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if (mSlots[slot].mBufferState == BufferSlot::ACQUIRED) {
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mSlots[slot].mNeedsCleanupOnRelease = true;
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}
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if (mSlots[slot].mBufferState != BufferSlot::FREE) {
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mFreeSlots.insert(slot);
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} else if (hadBuffer) {
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// If the slot was FREE, but we had a buffer, we need to move this slot
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// from the free buffers list to the the free slots list
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mFreeBuffers.remove(slot);
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mFreeSlots.insert(slot);
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}
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mSlots[slot].mBufferState = BufferSlot::FREE;
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mSlots[slot].mAcquireCalled = false;
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// Destroy fence as BufferQueue now takes ownership
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if (mSlots[slot].mEglFence != EGL_NO_SYNC_KHR) {
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eglDestroySyncKHR(mSlots[slot].mEglDisplay, mSlots[slot].mEglFence);
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mSlots[slot].mEglFence = EGL_NO_SYNC_KHR;
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}
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mSlots[slot].mFence = Fence::NO_FENCE;
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validateConsistencyLocked();
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}
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void BufferQueueCore::freeAllBuffersLocked() {
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mBufferHasBeenQueued = false;
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for (int s = 0; s < BufferQueueDefs::NUM_BUFFER_SLOTS; ++s) {
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freeBufferLocked(s);
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}
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}
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bool BufferQueueCore::stillTracking(const BufferItem* item) const {
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const BufferSlot& slot = mSlots[item->mSlot];
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BQ_LOGV("stillTracking: item { slot=%d/%" PRIu64 " buffer=%p } "
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"slot { slot=%d/%" PRIu64 " buffer=%p }",
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item->mSlot, item->mFrameNumber,
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(item->mGraphicBuffer.get() ? item->mGraphicBuffer->handle : 0),
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item->mSlot, slot.mFrameNumber,
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(slot.mGraphicBuffer.get() ? slot.mGraphicBuffer->handle : 0));
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// Compare item with its original buffer slot. We can check the slot as
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// the buffer would not be moved to a different slot by the producer.
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return (slot.mGraphicBuffer != NULL) &&
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(item->mGraphicBuffer->handle == slot.mGraphicBuffer->handle);
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}
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void BufferQueueCore::waitWhileAllocatingLocked() const {
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ATRACE_CALL();
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while (mIsAllocating) {
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mIsAllocatingCondition.wait(mMutex);
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}
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}
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void BufferQueueCore::validateConsistencyLocked() const {
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static const useconds_t PAUSE_TIME = 0;
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for (int slot = 0; slot < BufferQueueDefs::NUM_BUFFER_SLOTS; ++slot) {
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bool isInFreeSlots = mFreeSlots.count(slot) != 0;
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bool isInFreeBuffers =
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std::find(mFreeBuffers.cbegin(), mFreeBuffers.cend(), slot) !=
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mFreeBuffers.cend();
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if (mSlots[slot].mBufferState == BufferSlot::FREE) {
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if (mSlots[slot].mGraphicBuffer == NULL) {
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if (!isInFreeSlots) {
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BQ_LOGE("Slot %d is FREE but is not in mFreeSlots", slot);
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usleep(PAUSE_TIME);
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}
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if (isInFreeBuffers) {
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BQ_LOGE("Slot %d is in mFreeSlots "
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"but is also in mFreeBuffers", slot);
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usleep(PAUSE_TIME);
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}
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} else {
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if (!isInFreeBuffers) {
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BQ_LOGE("Slot %d is FREE but is not in mFreeBuffers", slot);
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usleep(PAUSE_TIME);
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}
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if (isInFreeSlots) {
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BQ_LOGE("Slot %d is in mFreeBuffers "
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"but is also in mFreeSlots", slot);
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usleep(PAUSE_TIME);
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}
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}
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} else {
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if (isInFreeSlots) {
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BQ_LOGE("Slot %d is in mFreeSlots but is not FREE (%d)",
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slot, mSlots[slot].mBufferState);
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usleep(PAUSE_TIME);
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}
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if (isInFreeBuffers) {
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BQ_LOGE("Slot %d is in mFreeBuffers but is not FREE (%d)",
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slot, mSlots[slot].mBufferState);
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usleep(PAUSE_TIME);
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}
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}
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}
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}
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} // namespace android
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