723 lines
25 KiB
C++
723 lines
25 KiB
C++
/*
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* Copyright (C) 2012 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 "BufferQueue"
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#define GL_GLEXT_PROTOTYPES
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#define EGL_EGLEXT_PROTOTYPES
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <gui/BufferQueue.h>
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#include <private/gui/ComposerService.h>
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#include <surfaceflinger/ISurfaceComposer.h>
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#include <utils/Log.h>
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// This compile option causes SurfaceTexture to return the buffer that is currently
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// attached to the GL texture from dequeueBuffer when no other buffers are
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// available. It requires the drivers (Gralloc, GL, OMX IL, and Camera) to do
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// implicit cross-process synchronization to prevent the buffer from being
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// written to before the buffer has (a) been detached from the GL texture and
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// (b) all GL reads from the buffer have completed.
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#ifdef ALLOW_DEQUEUE_CURRENT_BUFFER
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#define FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER true
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#warning "ALLOW_DEQUEUE_CURRENT_BUFFER enabled"
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#else
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#define FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER false
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#endif
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// Macros for including the BufferQueue name in log messages
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#define ST_LOGV(x, ...) ALOGV("[%s] "x, mName.string(), ##__VA_ARGS__)
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#define ST_LOGD(x, ...) ALOGD("[%s] "x, mName.string(), ##__VA_ARGS__)
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#define ST_LOGI(x, ...) ALOGI("[%s] "x, mName.string(), ##__VA_ARGS__)
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#define ST_LOGW(x, ...) ALOGW("[%s] "x, mName.string(), ##__VA_ARGS__)
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#define ST_LOGE(x, ...) ALOGE("[%s] "x, mName.string(), ##__VA_ARGS__)
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namespace android {
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// Get an ID that's unique within this process.
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static int32_t createProcessUniqueId() {
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static volatile int32_t globalCounter = 0;
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return android_atomic_inc(&globalCounter);
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}
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BufferQueue::BufferQueue( bool allowSynchronousMode ) :
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mDefaultWidth(1),
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mDefaultHeight(1),
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mPixelFormat(PIXEL_FORMAT_RGBA_8888),
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mBufferCount(MIN_ASYNC_BUFFER_SLOTS),
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mClientBufferCount(0),
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mServerBufferCount(MIN_ASYNC_BUFFER_SLOTS),
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mCurrentTexture(INVALID_BUFFER_SLOT),
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mNextTransform(0),
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mNextScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
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mSynchronousMode(false),
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mAllowSynchronousMode(allowSynchronousMode),
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mConnectedApi(NO_CONNECTED_API),
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mAbandoned(false),
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mFrameCounter(0)
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{
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// Choose a name using the PID and a process-unique ID.
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mName = String8::format("unnamed-%d-%d", getpid(), createProcessUniqueId());
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ST_LOGV("BufferQueue");
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sp<ISurfaceComposer> composer(ComposerService::getComposerService());
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mGraphicBufferAlloc = composer->createGraphicBufferAlloc();
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mNextCrop.makeInvalid();
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}
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BufferQueue::~BufferQueue() {
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ST_LOGV("~BufferQueue");
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}
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status_t BufferQueue::setBufferCountServerLocked(int bufferCount) {
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if (bufferCount > NUM_BUFFER_SLOTS)
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return BAD_VALUE;
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// special-case, nothing to do
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if (bufferCount == mBufferCount)
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return OK;
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if (!mClientBufferCount &&
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bufferCount >= mBufferCount) {
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// easy, we just have more buffers
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mBufferCount = bufferCount;
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mServerBufferCount = bufferCount;
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mDequeueCondition.signal();
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} else {
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// we're here because we're either
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// - reducing the number of available buffers
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// - or there is a client-buffer-count in effect
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// less than 2 buffers is never allowed
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if (bufferCount < 2)
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return BAD_VALUE;
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// when there is non client-buffer-count in effect, the client is not
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// allowed to dequeue more than one buffer at a time,
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// so the next time they dequeue a buffer, we know that they don't
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// own one. the actual resizing will happen during the next
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// dequeueBuffer.
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mServerBufferCount = bufferCount;
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}
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return OK;
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}
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status_t BufferQueue::setBufferCount(int bufferCount) {
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ST_LOGV("setBufferCount: count=%d", bufferCount);
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Mutex::Autolock lock(mMutex);
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if (mAbandoned) {
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ST_LOGE("setBufferCount: SurfaceTexture has been abandoned!");
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return NO_INIT;
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}
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if (bufferCount > NUM_BUFFER_SLOTS) {
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ST_LOGE("setBufferCount: bufferCount larger than slots available");
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return BAD_VALUE;
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}
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// Error out if the user has dequeued buffers
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for (int i=0 ; i<mBufferCount ; i++) {
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if (mSlots[i].mBufferState == BufferSlot::DEQUEUED) {
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ST_LOGE("setBufferCount: client owns some buffers");
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return -EINVAL;
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}
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}
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const int minBufferSlots = mSynchronousMode ?
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MIN_SYNC_BUFFER_SLOTS : MIN_ASYNC_BUFFER_SLOTS;
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if (bufferCount == 0) {
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mClientBufferCount = 0;
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bufferCount = (mServerBufferCount >= minBufferSlots) ?
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mServerBufferCount : minBufferSlots;
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return setBufferCountServerLocked(bufferCount);
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}
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if (bufferCount < minBufferSlots) {
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ST_LOGE("setBufferCount: requested buffer count (%d) is less than "
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"minimum (%d)", bufferCount, minBufferSlots);
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return BAD_VALUE;
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}
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// here we're guaranteed that the client doesn't have dequeued buffers
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// and will release all of its buffer references.
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freeAllBuffersLocked();
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mBufferCount = bufferCount;
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mClientBufferCount = bufferCount;
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mCurrentTexture = INVALID_BUFFER_SLOT;
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mQueue.clear();
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mDequeueCondition.signal();
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return OK;
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}
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status_t BufferQueue::requestBuffer(int slot, sp<GraphicBuffer>* buf) {
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ST_LOGV("requestBuffer: slot=%d", slot);
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Mutex::Autolock lock(mMutex);
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if (mAbandoned) {
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ST_LOGE("requestBuffer: SurfaceTexture has been abandoned!");
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return NO_INIT;
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}
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if (slot < 0 || mBufferCount <= slot) {
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ST_LOGE("requestBuffer: slot index out of range [0, %d]: %d",
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mBufferCount, slot);
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return BAD_VALUE;
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}
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mSlots[slot].mRequestBufferCalled = true;
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*buf = mSlots[slot].mGraphicBuffer;
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return NO_ERROR;
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}
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status_t BufferQueue::dequeueBuffer(int *outBuf, uint32_t w, uint32_t h,
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uint32_t format, uint32_t usage) {
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ST_LOGV("dequeueBuffer: w=%d h=%d fmt=%#x usage=%#x", w, h, format, usage);
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if ((w && !h) || (!w && h)) {
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ST_LOGE("dequeueBuffer: invalid size: w=%u, h=%u", w, h);
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return BAD_VALUE;
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}
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status_t returnFlags(OK);
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EGLDisplay dpy = EGL_NO_DISPLAY;
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EGLSyncKHR fence = EGL_NO_SYNC_KHR;
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{ // Scope for the lock
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Mutex::Autolock lock(mMutex);
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int found = -1;
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int foundSync = -1;
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int dequeuedCount = 0;
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bool tryAgain = true;
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while (tryAgain) {
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if (mAbandoned) {
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ST_LOGE("dequeueBuffer: SurfaceTexture has been abandoned!");
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return NO_INIT;
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}
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// We need to wait for the FIFO to drain if the number of buffer
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// needs to change.
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//
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// The condition "number of buffers needs to change" is true if
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// - the client doesn't care about how many buffers there are
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// - AND the actual number of buffer is different from what was
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// set in the last setBufferCountServer()
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// - OR -
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// setBufferCountServer() was set to a value incompatible with
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// the synchronization mode (for instance because the sync mode
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// changed since)
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//
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// As long as this condition is true AND the FIFO is not empty, we
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// wait on mDequeueCondition.
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const int minBufferCountNeeded = mSynchronousMode ?
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MIN_SYNC_BUFFER_SLOTS : MIN_ASYNC_BUFFER_SLOTS;
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const bool numberOfBuffersNeedsToChange = !mClientBufferCount &&
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((mServerBufferCount != mBufferCount) ||
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(mServerBufferCount < minBufferCountNeeded));
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if (!mQueue.isEmpty() && numberOfBuffersNeedsToChange) {
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// wait for the FIFO to drain
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mDequeueCondition.wait(mMutex);
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// NOTE: we continue here because we need to reevaluate our
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// whole state (eg: we could be abandoned or disconnected)
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continue;
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}
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if (numberOfBuffersNeedsToChange) {
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// here we're guaranteed that mQueue is empty
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freeAllBuffersLocked();
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mBufferCount = mServerBufferCount;
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if (mBufferCount < minBufferCountNeeded)
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mBufferCount = minBufferCountNeeded;
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mCurrentTexture = INVALID_BUFFER_SLOT;
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returnFlags |= ISurfaceTexture::RELEASE_ALL_BUFFERS;
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}
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// look for a free buffer to give to the client
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found = INVALID_BUFFER_SLOT;
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foundSync = INVALID_BUFFER_SLOT;
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dequeuedCount = 0;
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for (int i = 0; i < mBufferCount; i++) {
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const int state = mSlots[i].mBufferState;
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if (state == BufferSlot::DEQUEUED) {
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dequeuedCount++;
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}
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// if buffer is FREE it CANNOT be current
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ALOGW_IF((state == BufferSlot::FREE) && (mCurrentTexture==i),
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"dequeueBuffer: buffer %d is both FREE and current!",
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i);
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if (FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER) {
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if (state == BufferSlot::FREE || i == mCurrentTexture) {
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foundSync = i;
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if (i != mCurrentTexture) {
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found = i;
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break;
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}
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}
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} else {
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if (state == BufferSlot::FREE) {
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/* We return the oldest of the free buffers to avoid
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* stalling the producer if possible. This is because
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* the consumer may still have pending reads of the
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* buffers in flight.
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*/
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bool isOlder = mSlots[i].mFrameNumber <
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mSlots[found].mFrameNumber;
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if (found < 0 || isOlder) {
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foundSync = i;
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found = i;
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}
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}
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}
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}
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// clients are not allowed to dequeue more than one buffer
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// if they didn't set a buffer count.
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if (!mClientBufferCount && dequeuedCount) {
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ST_LOGE("dequeueBuffer: can't dequeue multiple buffers without "
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"setting the buffer count");
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return -EINVAL;
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}
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// See whether a buffer has been queued since the last
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// setBufferCount so we know whether to perform the
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// MIN_UNDEQUEUED_BUFFERS check below.
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bool bufferHasBeenQueued = mCurrentTexture != INVALID_BUFFER_SLOT;
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if (bufferHasBeenQueued) {
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// make sure the client is not trying to dequeue more buffers
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// than allowed.
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const int avail = mBufferCount - (dequeuedCount+1);
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if (avail < (MIN_UNDEQUEUED_BUFFERS-int(mSynchronousMode))) {
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ST_LOGE("dequeueBuffer: MIN_UNDEQUEUED_BUFFERS=%d exceeded "
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"(dequeued=%d)",
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MIN_UNDEQUEUED_BUFFERS-int(mSynchronousMode),
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dequeuedCount);
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return -EBUSY;
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}
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}
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// we're in synchronous mode and didn't find a buffer, we need to
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// wait for some buffers to be consumed
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tryAgain = mSynchronousMode && (foundSync == INVALID_BUFFER_SLOT);
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if (tryAgain) {
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mDequeueCondition.wait(mMutex);
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}
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}
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if (mSynchronousMode && found == INVALID_BUFFER_SLOT) {
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// foundSync guaranteed to be != INVALID_BUFFER_SLOT
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found = foundSync;
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}
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if (found == INVALID_BUFFER_SLOT) {
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// This should not happen.
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ST_LOGE("dequeueBuffer: no available buffer slots");
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return -EBUSY;
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}
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const int buf = found;
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*outBuf = found;
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const bool useDefaultSize = !w && !h;
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if (useDefaultSize) {
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// use the default size
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w = mDefaultWidth;
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h = mDefaultHeight;
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}
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const bool updateFormat = (format != 0);
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if (!updateFormat) {
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// keep the current (or default) format
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format = mPixelFormat;
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}
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// buffer is now in DEQUEUED (but can also be current at the same time,
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// if we're in synchronous mode)
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mSlots[buf].mBufferState = BufferSlot::DEQUEUED;
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const sp<GraphicBuffer>& buffer(mSlots[buf].mGraphicBuffer);
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if ((buffer == NULL) ||
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(uint32_t(buffer->width) != w) ||
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(uint32_t(buffer->height) != h) ||
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(uint32_t(buffer->format) != format) ||
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((uint32_t(buffer->usage) & usage) != usage))
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{
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usage |= GraphicBuffer::USAGE_HW_TEXTURE;
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status_t error;
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sp<GraphicBuffer> graphicBuffer(
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mGraphicBufferAlloc->createGraphicBuffer(
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w, h, format, usage, &error));
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if (graphicBuffer == 0) {
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ST_LOGE("dequeueBuffer: SurfaceComposer::createGraphicBuffer "
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"failed");
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return error;
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}
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if (updateFormat) {
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mPixelFormat = format;
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}
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mSlots[buf].mGraphicBuffer = graphicBuffer;
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mSlots[buf].mRequestBufferCalled = false;
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mSlots[buf].mFence = EGL_NO_SYNC_KHR;
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if (mSlots[buf].mEglImage != EGL_NO_IMAGE_KHR) {
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eglDestroyImageKHR(mSlots[buf].mEglDisplay,
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mSlots[buf].mEglImage);
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mSlots[buf].mEglImage = EGL_NO_IMAGE_KHR;
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mSlots[buf].mEglDisplay = EGL_NO_DISPLAY;
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}
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if (mCurrentTexture == buf) {
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// The current texture no longer references the buffer in this slot
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// since we just allocated a new buffer.
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mCurrentTexture = INVALID_BUFFER_SLOT;
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}
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returnFlags |= ISurfaceTexture::BUFFER_NEEDS_REALLOCATION;
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}
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dpy = mSlots[buf].mEglDisplay;
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fence = mSlots[buf].mFence;
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mSlots[buf].mFence = EGL_NO_SYNC_KHR;
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}
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if (fence != EGL_NO_SYNC_KHR) {
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EGLint result = eglClientWaitSyncKHR(dpy, fence, 0, 1000000000);
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// If something goes wrong, log the error, but return the buffer without
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// synchronizing access to it. It's too late at this point to abort the
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// dequeue operation.
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if (result == EGL_FALSE) {
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ALOGE("dequeueBuffer: error waiting for fence: %#x", eglGetError());
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} else if (result == EGL_TIMEOUT_EXPIRED_KHR) {
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ALOGE("dequeueBuffer: timeout waiting for fence");
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}
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eglDestroySyncKHR(dpy, fence);
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}
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ST_LOGV("dequeueBuffer: returning slot=%d buf=%p flags=%#x", *outBuf,
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mSlots[*outBuf].mGraphicBuffer->handle, returnFlags);
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return returnFlags;
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}
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status_t BufferQueue::setSynchronousMode(bool enabled) {
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ST_LOGV("setSynchronousMode: enabled=%d", enabled);
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Mutex::Autolock lock(mMutex);
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if (mAbandoned) {
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ST_LOGE("setSynchronousMode: SurfaceTexture has been abandoned!");
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return NO_INIT;
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}
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status_t err = OK;
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if (!mAllowSynchronousMode && enabled)
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return err;
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if (!enabled) {
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// going to asynchronous mode, drain the queue
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err = drainQueueLocked();
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if (err != NO_ERROR)
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return err;
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}
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if (mSynchronousMode != enabled) {
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// - if we're going to asynchronous mode, the queue is guaranteed to be
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// empty here
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// - if the client set the number of buffers, we're guaranteed that
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// we have at least 3 (because we don't allow less)
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mSynchronousMode = enabled;
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mDequeueCondition.signal();
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}
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return err;
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}
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status_t BufferQueue::queueBuffer(int buf, int64_t timestamp,
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uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) {
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ST_LOGV("queueBuffer: slot=%d time=%lld", buf, timestamp);
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sp<FrameAvailableListener> listener;
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{ // scope for the lock
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Mutex::Autolock lock(mMutex);
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if (mAbandoned) {
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ST_LOGE("queueBuffer: SurfaceTexture has been abandoned!");
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return NO_INIT;
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}
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if (buf < 0 || buf >= mBufferCount) {
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ST_LOGE("queueBuffer: slot index out of range [0, %d]: %d",
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mBufferCount, buf);
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return -EINVAL;
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} else if (mSlots[buf].mBufferState != BufferSlot::DEQUEUED) {
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ST_LOGE("queueBuffer: slot %d is not owned by the client "
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"(state=%d)", buf, mSlots[buf].mBufferState);
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return -EINVAL;
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} else if (buf == mCurrentTexture) {
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ST_LOGE("queueBuffer: slot %d is current!", buf);
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return -EINVAL;
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} else if (!mSlots[buf].mRequestBufferCalled) {
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ST_LOGE("queueBuffer: slot %d was enqueued without requesting a "
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"buffer", buf);
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return -EINVAL;
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}
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if (mSynchronousMode) {
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// In synchronous mode we queue all buffers in a FIFO.
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mQueue.push_back(buf);
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// Synchronous mode always signals that an additional frame should
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// be consumed.
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listener = mFrameAvailableListener;
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} else {
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// In asynchronous mode we only keep the most recent buffer.
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if (mQueue.empty()) {
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mQueue.push_back(buf);
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|
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// Asynchronous mode only signals that a frame should be
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// consumed if no previous frame was pending. If a frame were
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// pending then the consumer would have already been notified.
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listener = mFrameAvailableListener;
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|
} else {
|
|
Fifo::iterator front(mQueue.begin());
|
|
// buffer currently queued is freed
|
|
mSlots[*front].mBufferState = BufferSlot::FREE;
|
|
// and we record the new buffer index in the queued list
|
|
*front = buf;
|
|
}
|
|
}
|
|
|
|
mSlots[buf].mBufferState = BufferSlot::QUEUED;
|
|
mSlots[buf].mCrop = mNextCrop;
|
|
mSlots[buf].mTransform = mNextTransform;
|
|
mSlots[buf].mScalingMode = mNextScalingMode;
|
|
mSlots[buf].mTimestamp = timestamp;
|
|
mFrameCounter++;
|
|
mSlots[buf].mFrameNumber = mFrameCounter;
|
|
|
|
mDequeueCondition.signal();
|
|
|
|
*outWidth = mDefaultWidth;
|
|
*outHeight = mDefaultHeight;
|
|
*outTransform = 0;
|
|
} // scope for the lock
|
|
|
|
// call back without lock held
|
|
if (listener != 0) {
|
|
listener->onFrameAvailable();
|
|
}
|
|
return OK;
|
|
}
|
|
|
|
void BufferQueue::cancelBuffer(int buf) {
|
|
ST_LOGV("cancelBuffer: slot=%d", buf);
|
|
Mutex::Autolock lock(mMutex);
|
|
|
|
if (mAbandoned) {
|
|
ST_LOGW("cancelBuffer: BufferQueue has been abandoned!");
|
|
return;
|
|
}
|
|
|
|
if (buf < 0 || buf >= mBufferCount) {
|
|
ST_LOGE("cancelBuffer: slot index out of range [0, %d]: %d",
|
|
mBufferCount, buf);
|
|
return;
|
|
} else if (mSlots[buf].mBufferState != BufferSlot::DEQUEUED) {
|
|
ST_LOGE("cancelBuffer: slot %d is not owned by the client (state=%d)",
|
|
buf, mSlots[buf].mBufferState);
|
|
return;
|
|
}
|
|
mSlots[buf].mBufferState = BufferSlot::FREE;
|
|
mSlots[buf].mFrameNumber = 0;
|
|
mDequeueCondition.signal();
|
|
}
|
|
|
|
status_t BufferQueue::setCrop(const Rect& crop) {
|
|
ST_LOGV("setCrop: crop=[%d,%d,%d,%d]", crop.left, crop.top, crop.right,
|
|
crop.bottom);
|
|
|
|
Mutex::Autolock lock(mMutex);
|
|
if (mAbandoned) {
|
|
ST_LOGE("setCrop: BufferQueue has been abandoned!");
|
|
return NO_INIT;
|
|
}
|
|
mNextCrop = crop;
|
|
return OK;
|
|
}
|
|
|
|
status_t BufferQueue::setTransform(uint32_t transform) {
|
|
ST_LOGV("setTransform: xform=%#x", transform);
|
|
Mutex::Autolock lock(mMutex);
|
|
if (mAbandoned) {
|
|
ST_LOGE("setTransform: BufferQueue has been abandoned!");
|
|
return NO_INIT;
|
|
}
|
|
mNextTransform = transform;
|
|
return OK;
|
|
}
|
|
|
|
status_t BufferQueue::setScalingMode(int mode) {
|
|
ST_LOGV("setScalingMode: mode=%d", mode);
|
|
|
|
switch (mode) {
|
|
case NATIVE_WINDOW_SCALING_MODE_FREEZE:
|
|
case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
|
|
break;
|
|
default:
|
|
ST_LOGE("unknown scaling mode: %d", mode);
|
|
return BAD_VALUE;
|
|
}
|
|
|
|
Mutex::Autolock lock(mMutex);
|
|
mNextScalingMode = mode;
|
|
return OK;
|
|
}
|
|
|
|
status_t BufferQueue::connect(int api,
|
|
uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) {
|
|
ST_LOGV("connect: api=%d", api);
|
|
Mutex::Autolock lock(mMutex);
|
|
|
|
if (mAbandoned) {
|
|
ST_LOGE("connect: BufferQueue has been abandoned!");
|
|
return NO_INIT;
|
|
}
|
|
|
|
int err = NO_ERROR;
|
|
switch (api) {
|
|
case NATIVE_WINDOW_API_EGL:
|
|
case NATIVE_WINDOW_API_CPU:
|
|
case NATIVE_WINDOW_API_MEDIA:
|
|
case NATIVE_WINDOW_API_CAMERA:
|
|
if (mConnectedApi != NO_CONNECTED_API) {
|
|
ST_LOGE("connect: already connected (cur=%d, req=%d)",
|
|
mConnectedApi, api);
|
|
err = -EINVAL;
|
|
} else {
|
|
mConnectedApi = api;
|
|
*outWidth = mDefaultWidth;
|
|
*outHeight = mDefaultHeight;
|
|
*outTransform = 0;
|
|
}
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
status_t BufferQueue::disconnect(int api) {
|
|
ST_LOGV("disconnect: api=%d", api);
|
|
Mutex::Autolock lock(mMutex);
|
|
|
|
if (mAbandoned) {
|
|
// it is not really an error to disconnect after the surface
|
|
// has been abandoned, it should just be a no-op.
|
|
return NO_ERROR;
|
|
}
|
|
|
|
int err = NO_ERROR;
|
|
switch (api) {
|
|
case NATIVE_WINDOW_API_EGL:
|
|
case NATIVE_WINDOW_API_CPU:
|
|
case NATIVE_WINDOW_API_MEDIA:
|
|
case NATIVE_WINDOW_API_CAMERA:
|
|
if (mConnectedApi == api) {
|
|
drainQueueAndFreeBuffersLocked();
|
|
mConnectedApi = NO_CONNECTED_API;
|
|
mNextCrop.makeInvalid();
|
|
mNextScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
|
|
mNextTransform = 0;
|
|
mDequeueCondition.signal();
|
|
} else {
|
|
ST_LOGE("disconnect: connected to another api (cur=%d, req=%d)",
|
|
mConnectedApi, api);
|
|
err = -EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
ST_LOGE("disconnect: unknown API %d", api);
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
void BufferQueue::freeBufferLocked(int i) {
|
|
mSlots[i].mGraphicBuffer = 0;
|
|
mSlots[i].mBufferState = BufferSlot::FREE;
|
|
mSlots[i].mFrameNumber = 0;
|
|
if (mSlots[i].mEglImage != EGL_NO_IMAGE_KHR) {
|
|
eglDestroyImageKHR(mSlots[i].mEglDisplay, mSlots[i].mEglImage);
|
|
mSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
|
|
mSlots[i].mEglDisplay = EGL_NO_DISPLAY;
|
|
}
|
|
}
|
|
|
|
void BufferQueue::freeAllBuffersLocked() {
|
|
ALOGW_IF(!mQueue.isEmpty(),
|
|
"freeAllBuffersLocked called but mQueue is not empty");
|
|
mCurrentTexture = INVALID_BUFFER_SLOT;
|
|
for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
|
|
freeBufferLocked(i);
|
|
}
|
|
}
|
|
|
|
void BufferQueue::freeAllBuffersExceptHeadLocked() {
|
|
ALOGW_IF(!mQueue.isEmpty(),
|
|
"freeAllBuffersExceptCurrentLocked called but mQueue is not empty");
|
|
int head = -1;
|
|
if (!mQueue.empty()) {
|
|
Fifo::iterator front(mQueue.begin());
|
|
head = *front;
|
|
}
|
|
mCurrentTexture = INVALID_BUFFER_SLOT;
|
|
for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
|
|
if (i != head) {
|
|
freeBufferLocked(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
status_t BufferQueue::drainQueueLocked() {
|
|
while (mSynchronousMode && !mQueue.isEmpty()) {
|
|
mDequeueCondition.wait(mMutex);
|
|
if (mAbandoned) {
|
|
ST_LOGE("drainQueueLocked: BufferQueue has been abandoned!");
|
|
return NO_INIT;
|
|
}
|
|
if (mConnectedApi == NO_CONNECTED_API) {
|
|
ST_LOGE("drainQueueLocked: BufferQueue is not connected!");
|
|
return NO_INIT;
|
|
}
|
|
}
|
|
return NO_ERROR;
|
|
}
|
|
|
|
status_t BufferQueue::drainQueueAndFreeBuffersLocked() {
|
|
status_t err = drainQueueLocked();
|
|
if (err == NO_ERROR) {
|
|
if (mSynchronousMode) {
|
|
freeAllBuffersLocked();
|
|
} else {
|
|
freeAllBuffersExceptHeadLocked();
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
}; // namespace android
|