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/*
* Copyright 2014 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.
*/
#define LOG_TAG "BufferQueueCore"
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
//#define LOG_NDEBUG 0
#define EGL_EGLEXT_PROTOTYPES
#include <inttypes.h>
#include <gui/BufferItem.h>
#include <gui/BufferQueueCore.h>
#include <gui/IConsumerListener.h>
#include <gui/IGraphicBufferAlloc.h>
#include <gui/IProducerListener.h>
#include <gui/ISurfaceComposer.h>
#include <private/gui/ComposerService.h>
template <typename T>
static inline T max(T a, T b) { return a > b ? a : b; }
namespace android {
static String8 getUniqueName() {
static volatile int32_t counter = 0;
return String8::format("unnamed-%d-%d", getpid(),
android_atomic_inc(&counter));
}
BufferQueueCore::BufferQueueCore(const sp<IGraphicBufferAlloc>& allocator) :
mAllocator(allocator),
mMutex(),
mIsAbandoned(false),
mConsumerControlledByApp(false),
mConsumerName(getUniqueName()),
mConsumerListener(),
mConsumerUsageBits(0),
mConnectedApi(NO_CONNECTED_API),
mConnectedProducerListener(),
mSlots(),
mQueue(),
mOverrideMaxBufferCount(0),
mDequeueCondition(),
mUseAsyncBuffer(true),
mDequeueBufferCannotBlock(false),
mDefaultBufferFormat(PIXEL_FORMAT_RGBA_8888),
mDefaultWidth(1),
mDefaultHeight(1),
mDefaultMaxBufferCount(2),
mMaxAcquiredBufferCount(1),
mBufferHasBeenQueued(false),
mFrameCounter(0),
mTransformHint(0),
mIsAllocating(false),
mIsAllocatingCondition()
{
if (allocator == NULL) {
sp<ISurfaceComposer> composer(ComposerService::getComposerService());
mAllocator = composer->createGraphicBufferAlloc();
if (mAllocator == NULL) {
BQ_LOGE("createGraphicBufferAlloc failed");
}
}
}
BufferQueueCore::~BufferQueueCore() {}
void BufferQueueCore::dump(String8& result, const char* prefix) const {
Mutex::Autolock lock(mMutex);
String8 fifo;
Fifo::const_iterator current(mQueue.begin());
while (current != mQueue.end()) {
fifo.appendFormat("%02d:%p crop=[%d,%d,%d,%d], "
"xform=0x%02x, time=%#" PRIx64 ", scale=%s\n",
current->mSlot, current->mGraphicBuffer.get(),
current->mCrop.left, current->mCrop.top, current->mCrop.right,
current->mCrop.bottom, current->mTransform, current->mTimestamp,
BufferItem::scalingModeName(current->mScalingMode));
++current;
}
result.appendFormat("%s-BufferQueue mMaxAcquiredBufferCount=%d, "
"mDequeueBufferCannotBlock=%d, default-size=[%dx%d], "
"default-format=%d, transform-hint=%02x, FIFO(%zu)={%s}\n",
prefix, mMaxAcquiredBufferCount, mDequeueBufferCannotBlock,
mDefaultWidth, mDefaultHeight, mDefaultBufferFormat, mTransformHint,
mQueue.size(), fifo.string());
// Trim the free buffers so as to not spam the dump
int maxBufferCount = 0;
for (int s = BufferQueueDefs::NUM_BUFFER_SLOTS - 1; s >= 0; --s) {
const BufferSlot& slot(mSlots[s]);
if (slot.mBufferState != BufferSlot::FREE ||
slot.mGraphicBuffer != NULL) {
maxBufferCount = s + 1;
break;
}
}
for (int s = 0; s < maxBufferCount; ++s) {
const BufferSlot& slot(mSlots[s]);
const sp<GraphicBuffer>& buffer(slot.mGraphicBuffer);
result.appendFormat("%s%s[%02d:%p] state=%-8s", prefix,
(slot.mBufferState == BufferSlot::ACQUIRED) ? ">" : " ",
s, buffer.get(),
BufferSlot::bufferStateName(slot.mBufferState));
if (buffer != NULL) {
result.appendFormat(", %p [%4ux%4u:%4u,%3X]", buffer->handle,
buffer->width, buffer->height, buffer->stride,
buffer->format);
}
result.append("\n");
}
}
int BufferQueueCore::getMinUndequeuedBufferCountLocked(bool async) const {
// If dequeueBuffer is allowed to error out, we don't have to add an
// extra buffer.
if (!mUseAsyncBuffer) {
return mMaxAcquiredBufferCount;
}
if (mDequeueBufferCannotBlock || async) {
return mMaxAcquiredBufferCount + 1;
}
return mMaxAcquiredBufferCount;
}
int BufferQueueCore::getMinMaxBufferCountLocked(bool async) const {
return getMinUndequeuedBufferCountLocked(async) + 1;
}
int BufferQueueCore::getMaxBufferCountLocked(bool async) const {
int minMaxBufferCount = getMinMaxBufferCountLocked(async);
int maxBufferCount = max(mDefaultMaxBufferCount, minMaxBufferCount);
if (mOverrideMaxBufferCount != 0) {
assert(mOverrideMaxBufferCount >= minMaxBufferCount);
maxBufferCount = mOverrideMaxBufferCount;
}
// Any buffers that are dequeued by the producer or sitting in the queue
// waiting to be consumed need to have their slots preserved. Such buffers
// will temporarily keep the max buffer count up until the slots no longer
// need to be preserved.
for (int s = maxBufferCount; s < BufferQueueDefs::NUM_BUFFER_SLOTS; ++s) {
BufferSlot::BufferState state = mSlots[s].mBufferState;
if (state == BufferSlot::QUEUED || state == BufferSlot::DEQUEUED) {
maxBufferCount = s + 1;
}
}
return maxBufferCount;
}
status_t BufferQueueCore::setDefaultMaxBufferCountLocked(int count) {
const int minBufferCount = mUseAsyncBuffer ? 2 : 1;
if (count < minBufferCount || count > BufferQueueDefs::NUM_BUFFER_SLOTS) {
BQ_LOGV("setDefaultMaxBufferCount: invalid count %d, should be in "
"[%d, %d]",
count, minBufferCount, BufferQueueDefs::NUM_BUFFER_SLOTS);
return BAD_VALUE;
}
BQ_LOGV("setDefaultMaxBufferCount: setting count to %d", count);
mDefaultMaxBufferCount = count;
mDequeueCondition.broadcast();
return NO_ERROR;
}
void BufferQueueCore::freeBufferLocked(int slot) {
BQ_LOGV("freeBufferLocked: slot %d", slot);
mSlots[slot].mGraphicBuffer.clear();
if (mSlots[slot].mBufferState == BufferSlot::ACQUIRED) {
mSlots[slot].mNeedsCleanupOnRelease = true;
}
mSlots[slot].mBufferState = BufferSlot::FREE;
mSlots[slot].mFrameNumber = UINT32_MAX;
mSlots[slot].mAcquireCalled = false;
// Destroy fence as BufferQueue now takes ownership
if (mSlots[slot].mEglFence != EGL_NO_SYNC_KHR) {
eglDestroySyncKHR(mSlots[slot].mEglDisplay, mSlots[slot].mEglFence);
mSlots[slot].mEglFence = EGL_NO_SYNC_KHR;
}
mSlots[slot].mFence = Fence::NO_FENCE;
}
void BufferQueueCore::freeAllBuffersLocked() {
mBufferHasBeenQueued = false;
for (int s = 0; s < BufferQueueDefs::NUM_BUFFER_SLOTS; ++s) {
freeBufferLocked(s);
}
}
bool BufferQueueCore::stillTracking(const BufferItem* item) const {
const BufferSlot& slot = mSlots[item->mSlot];
BQ_LOGV("stillTracking: item { slot=%d/%" PRIu64 " buffer=%p } "
"slot { slot=%d/%" PRIu64 " buffer=%p }",
item->mSlot, item->mFrameNumber,
(item->mGraphicBuffer.get() ? item->mGraphicBuffer->handle : 0),
item->mSlot, slot.mFrameNumber,
(slot.mGraphicBuffer.get() ? slot.mGraphicBuffer->handle : 0));
// Compare item with its original buffer slot. We can check the slot as
// the buffer would not be moved to a different slot by the producer.
return (slot.mGraphicBuffer != NULL) &&
(item->mGraphicBuffer->handle == slot.mGraphicBuffer->handle);
}
void BufferQueueCore::waitWhileAllocatingLocked() const {
ATRACE_CALL();
while (mIsAllocating) {
mIsAllocatingCondition.wait(mMutex);
}
}
} // namespace android
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