097ca275f4
so we can do NULL checks again, and update calls to IInterface::asBinder() to use the new static version. Change-Id: Ia7b10eb38ca55b72278bfd33d3bf647f338b4e6a
285 lines
10 KiB
C++
285 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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#include <inttypes.h>
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#define LOG_TAG "StreamSplitter"
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#define ATRACE_TAG ATRACE_TAG_GRAPHICS
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//#define LOG_NDEBUG 0
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#include <gui/IGraphicBufferConsumer.h>
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#include <gui/IGraphicBufferProducer.h>
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#include <gui/StreamSplitter.h>
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#include <ui/GraphicBuffer.h>
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#include <binder/ProcessState.h>
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#include <utils/Trace.h>
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namespace android {
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status_t StreamSplitter::createSplitter(
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const sp<IGraphicBufferConsumer>& inputQueue,
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sp<StreamSplitter>* outSplitter) {
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if (inputQueue == NULL) {
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ALOGE("createSplitter: inputQueue must not be NULL");
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return BAD_VALUE;
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}
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if (outSplitter == NULL) {
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ALOGE("createSplitter: outSplitter must not be NULL");
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return BAD_VALUE;
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}
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sp<StreamSplitter> splitter(new StreamSplitter(inputQueue));
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status_t status = splitter->mInput->consumerConnect(splitter, false);
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if (status == NO_ERROR) {
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splitter->mInput->setConsumerName(String8("StreamSplitter"));
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*outSplitter = splitter;
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}
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return status;
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}
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StreamSplitter::StreamSplitter(const sp<IGraphicBufferConsumer>& inputQueue)
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: mIsAbandoned(false), mMutex(), mReleaseCondition(),
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mOutstandingBuffers(0), mInput(inputQueue), mOutputs(), mBuffers() {}
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StreamSplitter::~StreamSplitter() {
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mInput->consumerDisconnect();
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Vector<sp<IGraphicBufferProducer> >::iterator output = mOutputs.begin();
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for (; output != mOutputs.end(); ++output) {
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(*output)->disconnect(NATIVE_WINDOW_API_CPU);
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}
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if (mBuffers.size() > 0) {
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ALOGE("%zu buffers still being tracked", mBuffers.size());
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}
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}
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status_t StreamSplitter::addOutput(
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const sp<IGraphicBufferProducer>& outputQueue) {
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if (outputQueue == NULL) {
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ALOGE("addOutput: outputQueue must not be NULL");
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return BAD_VALUE;
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}
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Mutex::Autolock lock(mMutex);
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IGraphicBufferProducer::QueueBufferOutput queueBufferOutput;
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sp<OutputListener> listener(new OutputListener(this, outputQueue));
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IInterface::asBinder(outputQueue)->linkToDeath(listener);
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status_t status = outputQueue->connect(listener, NATIVE_WINDOW_API_CPU,
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/* producerControlledByApp */ false, &queueBufferOutput);
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if (status != NO_ERROR) {
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ALOGE("addOutput: failed to connect (%d)", status);
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return status;
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}
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mOutputs.push_back(outputQueue);
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return NO_ERROR;
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}
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void StreamSplitter::setName(const String8 &name) {
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Mutex::Autolock lock(mMutex);
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mInput->setConsumerName(name);
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}
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void StreamSplitter::onFrameAvailable() {
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ATRACE_CALL();
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Mutex::Autolock lock(mMutex);
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// The current policy is that if any one consumer is consuming buffers too
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// slowly, the splitter will stall the rest of the outputs by not acquiring
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// any more buffers from the input. This will cause back pressure on the
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// input queue, slowing down its producer.
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// If there are too many outstanding buffers, we block until a buffer is
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// released back to the input in onBufferReleased
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while (mOutstandingBuffers >= MAX_OUTSTANDING_BUFFERS) {
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mReleaseCondition.wait(mMutex);
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// If the splitter is abandoned while we are waiting, the release
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// condition variable will be broadcast, and we should just return
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// without attempting to do anything more (since the input queue will
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// also be abandoned).
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if (mIsAbandoned) {
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return;
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}
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}
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++mOutstandingBuffers;
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// Acquire and detach the buffer from the input
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IGraphicBufferConsumer::BufferItem bufferItem;
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status_t status = mInput->acquireBuffer(&bufferItem, /* presentWhen */ 0);
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LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
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"acquiring buffer from input failed (%d)", status);
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ALOGV("acquired buffer %#" PRIx64 " from input",
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bufferItem.mGraphicBuffer->getId());
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status = mInput->detachBuffer(bufferItem.mBuf);
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LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
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"detaching buffer from input failed (%d)", status);
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// Initialize our reference count for this buffer
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mBuffers.add(bufferItem.mGraphicBuffer->getId(),
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new BufferTracker(bufferItem.mGraphicBuffer));
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IGraphicBufferProducer::QueueBufferInput queueInput(
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bufferItem.mTimestamp, bufferItem.mIsAutoTimestamp,
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bufferItem.mCrop, bufferItem.mScalingMode,
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bufferItem.mTransform, bufferItem.mIsDroppable,
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bufferItem.mFence);
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// Attach and queue the buffer to each of the outputs
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Vector<sp<IGraphicBufferProducer> >::iterator output = mOutputs.begin();
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for (; output != mOutputs.end(); ++output) {
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int slot;
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status = (*output)->attachBuffer(&slot, bufferItem.mGraphicBuffer);
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if (status == NO_INIT) {
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// If we just discovered that this output has been abandoned, note
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// that, increment the release count so that we still release this
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// buffer eventually, and move on to the next output
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onAbandonedLocked();
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mBuffers.editValueFor(bufferItem.mGraphicBuffer->getId())->
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incrementReleaseCountLocked();
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continue;
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} else {
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LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
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"attaching buffer to output failed (%d)", status);
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}
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IGraphicBufferProducer::QueueBufferOutput queueOutput;
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status = (*output)->queueBuffer(slot, queueInput, &queueOutput);
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if (status == NO_INIT) {
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// If we just discovered that this output has been abandoned, note
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// that, increment the release count so that we still release this
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// buffer eventually, and move on to the next output
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onAbandonedLocked();
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mBuffers.editValueFor(bufferItem.mGraphicBuffer->getId())->
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incrementReleaseCountLocked();
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continue;
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} else {
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LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
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"queueing buffer to output failed (%d)", status);
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}
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ALOGV("queued buffer %#" PRIx64 " to output %p",
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bufferItem.mGraphicBuffer->getId(), output->get());
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}
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}
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void StreamSplitter::onBufferReleasedByOutput(
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const sp<IGraphicBufferProducer>& from) {
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ATRACE_CALL();
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Mutex::Autolock lock(mMutex);
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sp<GraphicBuffer> buffer;
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sp<Fence> fence;
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status_t status = from->detachNextBuffer(&buffer, &fence);
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if (status == NO_INIT) {
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// If we just discovered that this output has been abandoned, note that,
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// but we can't do anything else, since buffer is invalid
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onAbandonedLocked();
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return;
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} else {
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LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
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"detaching buffer from output failed (%d)", status);
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}
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ALOGV("detached buffer %#" PRIx64 " from output %p",
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buffer->getId(), from.get());
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const sp<BufferTracker>& tracker = mBuffers.editValueFor(buffer->getId());
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// Merge the release fence of the incoming buffer so that the fence we send
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// back to the input includes all of the outputs' fences
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tracker->mergeFence(fence);
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// Check to see if this is the last outstanding reference to this buffer
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size_t releaseCount = tracker->incrementReleaseCountLocked();
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ALOGV("buffer %#" PRIx64 " reference count %zu (of %zu)", buffer->getId(),
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releaseCount, mOutputs.size());
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if (releaseCount < mOutputs.size()) {
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return;
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}
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// If we've been abandoned, we can't return the buffer to the input, so just
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// stop tracking it and move on
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if (mIsAbandoned) {
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mBuffers.removeItem(buffer->getId());
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return;
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}
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// Attach and release the buffer back to the input
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int consumerSlot;
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status = mInput->attachBuffer(&consumerSlot, tracker->getBuffer());
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LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
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"attaching buffer to input failed (%d)", status);
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status = mInput->releaseBuffer(consumerSlot, /* frameNumber */ 0,
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EGL_NO_DISPLAY, EGL_NO_SYNC_KHR, tracker->getMergedFence());
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LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
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"releasing buffer to input failed (%d)", status);
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ALOGV("released buffer %#" PRIx64 " to input", buffer->getId());
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// We no longer need to track the buffer once it has been returned to the
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// input
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mBuffers.removeItem(buffer->getId());
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// Notify any waiting onFrameAvailable calls
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--mOutstandingBuffers;
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mReleaseCondition.signal();
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}
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void StreamSplitter::onAbandonedLocked() {
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ALOGE("one of my outputs has abandoned me");
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if (!mIsAbandoned) {
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mInput->consumerDisconnect();
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}
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mIsAbandoned = true;
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mReleaseCondition.broadcast();
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}
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StreamSplitter::OutputListener::OutputListener(
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const sp<StreamSplitter>& splitter,
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const sp<IGraphicBufferProducer>& output)
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: mSplitter(splitter), mOutput(output) {}
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StreamSplitter::OutputListener::~OutputListener() {}
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void StreamSplitter::OutputListener::onBufferReleased() {
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mSplitter->onBufferReleasedByOutput(mOutput);
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}
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void StreamSplitter::OutputListener::binderDied(const wp<IBinder>& /* who */) {
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Mutex::Autolock lock(mSplitter->mMutex);
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mSplitter->onAbandonedLocked();
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}
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StreamSplitter::BufferTracker::BufferTracker(const sp<GraphicBuffer>& buffer)
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: mBuffer(buffer), mMergedFence(Fence::NO_FENCE), mReleaseCount(0) {}
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StreamSplitter::BufferTracker::~BufferTracker() {}
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void StreamSplitter::BufferTracker::mergeFence(const sp<Fence>& with) {
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mMergedFence = Fence::merge(String8("StreamSplitter"), mMergedFence, with);
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}
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} // namespace android
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