| /* | 
 |  * Copyright 2013 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_NDEBUG 0 | 
 | #include "VirtualDisplaySurface.h" | 
 |  | 
 | #include <inttypes.h> | 
 |  | 
 | #include "HWComposer.h" | 
 | #include "SurfaceFlinger.h" | 
 |  | 
 | #include <gui/BufferItem.h> | 
 | #include <gui/BufferQueue.h> | 
 | #include <gui/IProducerListener.h> | 
 | #include <system/window.h> | 
 |  | 
 | // --------------------------------------------------------------------------- | 
 | namespace android { | 
 | // --------------------------------------------------------------------------- | 
 |  | 
 | #define VDS_LOGE(msg, ...) ALOGE("[%s] " msg, \ | 
 |         mDisplayName.string(), ##__VA_ARGS__) | 
 | #define VDS_LOGW_IF(cond, msg, ...) ALOGW_IF(cond, "[%s] " msg, \ | 
 |         mDisplayName.string(), ##__VA_ARGS__) | 
 | #define VDS_LOGV(msg, ...) ALOGV("[%s] " msg, \ | 
 |         mDisplayName.string(), ##__VA_ARGS__) | 
 |  | 
 | static const char* dbgCompositionTypeStr(DisplaySurface::CompositionType type) { | 
 |     switch (type) { | 
 |         case DisplaySurface::COMPOSITION_UNKNOWN: return "UNKNOWN"; | 
 |         case DisplaySurface::COMPOSITION_GLES:    return "GLES"; | 
 |         case DisplaySurface::COMPOSITION_HWC:     return "HWC"; | 
 |         case DisplaySurface::COMPOSITION_MIXED:   return "MIXED"; | 
 |         default:                                  return "<INVALID>"; | 
 |     } | 
 | } | 
 |  | 
 | VirtualDisplaySurface::VirtualDisplaySurface(HWComposer& hwc, int32_t dispId, | 
 |         const sp<IGraphicBufferProducer>& sink, | 
 |         const sp<IGraphicBufferProducer>& bqProducer, | 
 |         const sp<IGraphicBufferConsumer>& bqConsumer, | 
 |         const String8& name) | 
 | :   ConsumerBase(bqConsumer), | 
 |     mHwc(hwc), | 
 |     mDisplayId(dispId), | 
 |     mDisplayName(name), | 
 |     mSource{}, | 
 |     mDefaultOutputFormat(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED), | 
 |     mOutputFormat(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED), | 
 |     mOutputUsage(GRALLOC_USAGE_HW_COMPOSER), | 
 |     mProducerSlotSource(0), | 
 |     mProducerBuffers(), | 
 |     mQueueBufferOutput(), | 
 |     mSinkBufferWidth(0), | 
 |     mSinkBufferHeight(0), | 
 |     mCompositionType(COMPOSITION_UNKNOWN), | 
 |     mFbFence(Fence::NO_FENCE), | 
 |     mOutputFence(Fence::NO_FENCE), | 
 |     mFbProducerSlot(BufferQueue::INVALID_BUFFER_SLOT), | 
 |     mOutputProducerSlot(BufferQueue::INVALID_BUFFER_SLOT), | 
 |     mDbgState(DBG_STATE_IDLE), | 
 |     mDbgLastCompositionType(COMPOSITION_UNKNOWN), | 
 |     mMustRecompose(false), | 
 |     mForceHwcCopy(SurfaceFlinger::useHwcForRgbToYuv) | 
 | { | 
 |     mSource[SOURCE_SINK] = sink; | 
 |     mSource[SOURCE_SCRATCH] = bqProducer; | 
 |  | 
 |     resetPerFrameState(); | 
 |  | 
 |     int sinkWidth, sinkHeight; | 
 |     sink->query(NATIVE_WINDOW_WIDTH, &sinkWidth); | 
 |     sink->query(NATIVE_WINDOW_HEIGHT, &sinkHeight); | 
 |     mSinkBufferWidth = sinkWidth; | 
 |     mSinkBufferHeight = sinkHeight; | 
 |  | 
 |     // Pick the buffer format to request from the sink when not rendering to it | 
 |     // with GLES. If the consumer needs CPU access, use the default format | 
 |     // set by the consumer. Otherwise allow gralloc to decide the format based | 
 |     // on usage bits. | 
 |     int sinkUsage; | 
 |     sink->query(NATIVE_WINDOW_CONSUMER_USAGE_BITS, &sinkUsage); | 
 |     if (sinkUsage & (GRALLOC_USAGE_SW_READ_MASK | GRALLOC_USAGE_SW_WRITE_MASK)) { | 
 |         int sinkFormat; | 
 |         sink->query(NATIVE_WINDOW_FORMAT, &sinkFormat); | 
 |         mDefaultOutputFormat = sinkFormat; | 
 |     } else { | 
 |         mDefaultOutputFormat = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED; | 
 |     } | 
 |     mOutputFormat = mDefaultOutputFormat; | 
 |  | 
 |     ConsumerBase::mName = String8::format("VDS: %s", mDisplayName.string()); | 
 |     mConsumer->setConsumerName(ConsumerBase::mName); | 
 |     mConsumer->setConsumerUsageBits(GRALLOC_USAGE_HW_COMPOSER); | 
 |     mConsumer->setDefaultBufferSize(sinkWidth, sinkHeight); | 
 |     sink->setAsyncMode(true); | 
 |     IGraphicBufferProducer::QueueBufferOutput output; | 
 |     mSource[SOURCE_SCRATCH]->connect(NULL, NATIVE_WINDOW_API_EGL, false, &output); | 
 | } | 
 |  | 
 | VirtualDisplaySurface::~VirtualDisplaySurface() { | 
 |     mSource[SOURCE_SCRATCH]->disconnect(NATIVE_WINDOW_API_EGL); | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::beginFrame(bool mustRecompose) { | 
 |     if (mDisplayId < 0) | 
 |         return NO_ERROR; | 
 |  | 
 |     mMustRecompose = mustRecompose; | 
 |  | 
 |     VDS_LOGW_IF(mDbgState != DBG_STATE_IDLE, | 
 |             "Unexpected beginFrame() in %s state", dbgStateStr()); | 
 |     mDbgState = DBG_STATE_BEGUN; | 
 |  | 
 |     return refreshOutputBuffer(); | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::prepareFrame(CompositionType compositionType) { | 
 |     if (mDisplayId < 0) | 
 |         return NO_ERROR; | 
 |  | 
 |     VDS_LOGW_IF(mDbgState != DBG_STATE_BEGUN, | 
 |             "Unexpected prepareFrame() in %s state", dbgStateStr()); | 
 |     mDbgState = DBG_STATE_PREPARED; | 
 |  | 
 |     mCompositionType = compositionType; | 
 |     if (mForceHwcCopy && mCompositionType == COMPOSITION_GLES) { | 
 |         // Some hardware can do RGB->YUV conversion more efficiently in hardware | 
 |         // controlled by HWC than in hardware controlled by the video encoder. | 
 |         // Forcing GLES-composed frames to go through an extra copy by the HWC | 
 |         // allows the format conversion to happen there, rather than passing RGB | 
 |         // directly to the consumer. | 
 |         // | 
 |         // On the other hand, when the consumer prefers RGB or can consume RGB | 
 |         // inexpensively, this forces an unnecessary copy. | 
 |         mCompositionType = COMPOSITION_MIXED; | 
 |     } | 
 |  | 
 |     if (mCompositionType != mDbgLastCompositionType) { | 
 |         VDS_LOGV("prepareFrame: composition type changed to %s", | 
 |                 dbgCompositionTypeStr(mCompositionType)); | 
 |         mDbgLastCompositionType = mCompositionType; | 
 |     } | 
 |  | 
 |     if (mCompositionType != COMPOSITION_GLES && | 
 |             (mOutputFormat != mDefaultOutputFormat || | 
 |              mOutputUsage != GRALLOC_USAGE_HW_COMPOSER)) { | 
 |         // We must have just switched from GLES-only to MIXED or HWC | 
 |         // composition. Stop using the format and usage requested by the GLES | 
 |         // driver; they may be suboptimal when HWC is writing to the output | 
 |         // buffer. For example, if the output is going to a video encoder, and | 
 |         // HWC can write directly to YUV, some hardware can skip a | 
 |         // memory-to-memory RGB-to-YUV conversion step. | 
 |         // | 
 |         // If we just switched *to* GLES-only mode, we'll change the | 
 |         // format/usage and get a new buffer when the GLES driver calls | 
 |         // dequeueBuffer(). | 
 |         mOutputFormat = mDefaultOutputFormat; | 
 |         mOutputUsage = GRALLOC_USAGE_HW_COMPOSER; | 
 |         refreshOutputBuffer(); | 
 |     } | 
 |  | 
 |     return NO_ERROR; | 
 | } | 
 |  | 
 | #ifndef USE_HWC2 | 
 | status_t VirtualDisplaySurface::compositionComplete() { | 
 |     return NO_ERROR; | 
 | } | 
 | #endif | 
 |  | 
 | status_t VirtualDisplaySurface::advanceFrame() { | 
 |     if (mDisplayId < 0) | 
 |         return NO_ERROR; | 
 |  | 
 |     if (mCompositionType == COMPOSITION_HWC) { | 
 |         VDS_LOGW_IF(mDbgState != DBG_STATE_PREPARED, | 
 |                 "Unexpected advanceFrame() in %s state on HWC frame", | 
 |                 dbgStateStr()); | 
 |     } else { | 
 |         VDS_LOGW_IF(mDbgState != DBG_STATE_GLES_DONE, | 
 |                 "Unexpected advanceFrame() in %s state on GLES/MIXED frame", | 
 |                 dbgStateStr()); | 
 |     } | 
 |     mDbgState = DBG_STATE_HWC; | 
 |  | 
 |     if (mOutputProducerSlot < 0 || | 
 |             (mCompositionType != COMPOSITION_HWC && mFbProducerSlot < 0)) { | 
 |         // Last chance bailout if something bad happened earlier. For example, | 
 |         // in a GLES configuration, if the sink disappears then dequeueBuffer | 
 |         // will fail, the GLES driver won't queue a buffer, but SurfaceFlinger | 
 |         // will soldier on. So we end up here without a buffer. There should | 
 |         // be lots of scary messages in the log just before this. | 
 |         VDS_LOGE("advanceFrame: no buffer, bailing out"); | 
 |         return NO_MEMORY; | 
 |     } | 
 |  | 
 |     sp<GraphicBuffer> fbBuffer = mFbProducerSlot >= 0 ? | 
 |             mProducerBuffers[mFbProducerSlot] : sp<GraphicBuffer>(NULL); | 
 |     sp<GraphicBuffer> outBuffer = mProducerBuffers[mOutputProducerSlot]; | 
 |     VDS_LOGV("advanceFrame: fb=%d(%p) out=%d(%p)", | 
 |             mFbProducerSlot, fbBuffer.get(), | 
 |             mOutputProducerSlot, outBuffer.get()); | 
 |  | 
 |     // At this point we know the output buffer acquire fence, | 
 |     // so update HWC state with it. | 
 |     mHwc.setOutputBuffer(mDisplayId, mOutputFence, outBuffer); | 
 |  | 
 |     status_t result = NO_ERROR; | 
 |     if (fbBuffer != NULL) { | 
 | #ifdef USE_HWC2 | 
 |         uint32_t hwcSlot = 0; | 
 |         sp<GraphicBuffer> hwcBuffer; | 
 |         mHwcBufferCache.getHwcBuffer(mFbProducerSlot, fbBuffer, | 
 |                 &hwcSlot, &hwcBuffer); | 
 |  | 
 |         // TODO: Correctly propagate the dataspace from GL composition | 
 |         result = mHwc.setClientTarget(mDisplayId, hwcSlot, mFbFence, | 
 |                 hwcBuffer, HAL_DATASPACE_UNKNOWN); | 
 | #else | 
 |         result = mHwc.fbPost(mDisplayId, mFbFence, fbBuffer); | 
 | #endif | 
 |     } | 
 |  | 
 |     return result; | 
 | } | 
 |  | 
 | void VirtualDisplaySurface::onFrameCommitted() { | 
 |     if (mDisplayId < 0) | 
 |         return; | 
 |  | 
 |     VDS_LOGW_IF(mDbgState != DBG_STATE_HWC, | 
 |             "Unexpected onFrameCommitted() in %s state", dbgStateStr()); | 
 |     mDbgState = DBG_STATE_IDLE; | 
 |  | 
 | #ifdef USE_HWC2 | 
 |     sp<Fence> retireFence = mHwc.getPresentFence(mDisplayId); | 
 | #else | 
 |     sp<Fence> fbFence = mHwc.getAndResetReleaseFence(mDisplayId); | 
 | #endif | 
 |     if (mCompositionType == COMPOSITION_MIXED && mFbProducerSlot >= 0) { | 
 |         // release the scratch buffer back to the pool | 
 |         Mutex::Autolock lock(mMutex); | 
 |         int sslot = mapProducer2SourceSlot(SOURCE_SCRATCH, mFbProducerSlot); | 
 |         VDS_LOGV("onFrameCommitted: release scratch sslot=%d", sslot); | 
 | #ifdef USE_HWC2 | 
 |         addReleaseFenceLocked(sslot, mProducerBuffers[mFbProducerSlot], | 
 |                 retireFence); | 
 | #else | 
 |         addReleaseFenceLocked(sslot, mProducerBuffers[mFbProducerSlot], fbFence); | 
 | #endif | 
 |         releaseBufferLocked(sslot, mProducerBuffers[mFbProducerSlot], | 
 |                 EGL_NO_DISPLAY, EGL_NO_SYNC_KHR); | 
 |     } | 
 |  | 
 |     if (mOutputProducerSlot >= 0) { | 
 |         int sslot = mapProducer2SourceSlot(SOURCE_SINK, mOutputProducerSlot); | 
 |         QueueBufferOutput qbo; | 
 | #ifndef USE_HWC2 | 
 |         sp<Fence> outFence = mHwc.getLastRetireFence(mDisplayId); | 
 | #endif | 
 |         VDS_LOGV("onFrameCommitted: queue sink sslot=%d", sslot); | 
 |         if (mMustRecompose) { | 
 |             status_t result = mSource[SOURCE_SINK]->queueBuffer(sslot, | 
 |                     QueueBufferInput( | 
 |                         systemTime(), false /* isAutoTimestamp */, | 
 |                         HAL_DATASPACE_UNKNOWN, | 
 |                         Rect(mSinkBufferWidth, mSinkBufferHeight), | 
 |                         NATIVE_WINDOW_SCALING_MODE_FREEZE, 0 /* transform */, | 
 | #ifdef USE_HWC2 | 
 |                         retireFence), | 
 | #else | 
 |                         outFence), | 
 | #endif | 
 |                     &qbo); | 
 |             if (result == NO_ERROR) { | 
 |                 updateQueueBufferOutput(std::move(qbo)); | 
 |             } | 
 |         } else { | 
 |             // If the surface hadn't actually been updated, then we only went | 
 |             // through the motions of updating the display to keep our state | 
 |             // machine happy. We cancel the buffer to avoid triggering another | 
 |             // re-composition and causing an infinite loop. | 
 | #ifdef USE_HWC2 | 
 |             mSource[SOURCE_SINK]->cancelBuffer(sslot, retireFence); | 
 | #else | 
 |             mSource[SOURCE_SINK]->cancelBuffer(sslot, outFence); | 
 | #endif | 
 |         } | 
 |     } | 
 |  | 
 |     resetPerFrameState(); | 
 | } | 
 |  | 
 | void VirtualDisplaySurface::dumpAsString(String8& /* result */) const { | 
 | } | 
 |  | 
 | void VirtualDisplaySurface::resizeBuffers(const uint32_t w, const uint32_t h) { | 
 |     mQueueBufferOutput.width = w; | 
 |     mQueueBufferOutput.height = h; | 
 |     mSinkBufferWidth = w; | 
 |     mSinkBufferHeight = h; | 
 | } | 
 |  | 
 | const sp<Fence>& VirtualDisplaySurface::getClientTargetAcquireFence() const { | 
 |     return mFbFence; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::requestBuffer(int pslot, | 
 |         sp<GraphicBuffer>* outBuf) { | 
 |     if (mDisplayId < 0) | 
 |         return mSource[SOURCE_SINK]->requestBuffer(pslot, outBuf); | 
 |  | 
 |     VDS_LOGW_IF(mDbgState != DBG_STATE_GLES, | 
 |             "Unexpected requestBuffer pslot=%d in %s state", | 
 |             pslot, dbgStateStr()); | 
 |  | 
 |     *outBuf = mProducerBuffers[pslot]; | 
 |     return NO_ERROR; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::setMaxDequeuedBufferCount( | 
 |         int maxDequeuedBuffers) { | 
 |     return mSource[SOURCE_SINK]->setMaxDequeuedBufferCount(maxDequeuedBuffers); | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::setAsyncMode(bool async) { | 
 |     return mSource[SOURCE_SINK]->setAsyncMode(async); | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::dequeueBuffer(Source source, | 
 |         PixelFormat format, uint64_t usage, int* sslot, sp<Fence>* fence) { | 
 |     LOG_FATAL_IF(mDisplayId < 0, "mDisplayId=%d but should not be < 0.", mDisplayId); | 
 |  | 
 |     status_t result = mSource[source]->dequeueBuffer(sslot, fence, | 
 |             mSinkBufferWidth, mSinkBufferHeight, format, usage, nullptr); | 
 |     if (result < 0) | 
 |         return result; | 
 |     int pslot = mapSource2ProducerSlot(source, *sslot); | 
 |     VDS_LOGV("dequeueBuffer(%s): sslot=%d pslot=%d result=%d", | 
 |             dbgSourceStr(source), *sslot, pslot, result); | 
 |     uint64_t sourceBit = static_cast<uint64_t>(source) << pslot; | 
 |  | 
 |     if ((mProducerSlotSource & (1ULL << pslot)) != sourceBit) { | 
 |         // This slot was previously dequeued from the other source; must | 
 |         // re-request the buffer. | 
 |         result |= BUFFER_NEEDS_REALLOCATION; | 
 |         mProducerSlotSource &= ~(1ULL << pslot); | 
 |         mProducerSlotSource |= sourceBit; | 
 |     } | 
 |  | 
 |     if (result & RELEASE_ALL_BUFFERS) { | 
 |         for (uint32_t i = 0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) { | 
 |             if ((mProducerSlotSource & (1ULL << i)) == sourceBit) | 
 |                 mProducerBuffers[i].clear(); | 
 |         } | 
 |     } | 
 |     if (result & BUFFER_NEEDS_REALLOCATION) { | 
 |         result = mSource[source]->requestBuffer(*sslot, &mProducerBuffers[pslot]); | 
 |         if (result < 0) { | 
 |             mProducerBuffers[pslot].clear(); | 
 |             mSource[source]->cancelBuffer(*sslot, *fence); | 
 |             return result; | 
 |         } | 
 |         VDS_LOGV("dequeueBuffer(%s): buffers[%d]=%p fmt=%d usage=%#" PRIx64, | 
 |                 dbgSourceStr(source), pslot, mProducerBuffers[pslot].get(), | 
 |                 mProducerBuffers[pslot]->getPixelFormat(), | 
 |                 mProducerBuffers[pslot]->getUsage()); | 
 |     } | 
 |  | 
 |     return result; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::dequeueBuffer(int* pslot, sp<Fence>* fence, | 
 |         uint32_t w, uint32_t h, PixelFormat format, uint64_t usage, | 
 |         FrameEventHistoryDelta* outTimestamps) { | 
 |     if (mDisplayId < 0) { | 
 |         return mSource[SOURCE_SINK]->dequeueBuffer( | 
 |                 pslot, fence, w, h, format, usage, outTimestamps); | 
 |     } | 
 |  | 
 |     VDS_LOGW_IF(mDbgState != DBG_STATE_PREPARED, | 
 |             "Unexpected dequeueBuffer() in %s state", dbgStateStr()); | 
 |     mDbgState = DBG_STATE_GLES; | 
 |  | 
 |     VDS_LOGV("dequeueBuffer %dx%d fmt=%d usage=%#" PRIx64, w, h, format, usage); | 
 |  | 
 |     status_t result = NO_ERROR; | 
 |     Source source = fbSourceForCompositionType(mCompositionType); | 
 |  | 
 |     if (source == SOURCE_SINK) { | 
 |  | 
 |         if (mOutputProducerSlot < 0) { | 
 |             // Last chance bailout if something bad happened earlier. For example, | 
 |             // in a GLES configuration, if the sink disappears then dequeueBuffer | 
 |             // will fail, the GLES driver won't queue a buffer, but SurfaceFlinger | 
 |             // will soldier on. So we end up here without a buffer. There should | 
 |             // be lots of scary messages in the log just before this. | 
 |             VDS_LOGE("dequeueBuffer: no buffer, bailing out"); | 
 |             return NO_MEMORY; | 
 |         } | 
 |  | 
 |         // We already dequeued the output buffer. If the GLES driver wants | 
 |         // something incompatible, we have to cancel and get a new one. This | 
 |         // will mean that HWC will see a different output buffer between | 
 |         // prepare and set, but since we're in GLES-only mode already it | 
 |         // shouldn't matter. | 
 |  | 
 |         usage |= GRALLOC_USAGE_HW_COMPOSER; | 
 |         const sp<GraphicBuffer>& buf = mProducerBuffers[mOutputProducerSlot]; | 
 |         if ((usage & ~buf->getUsage()) != 0 || | 
 |                 (format != 0 && format != buf->getPixelFormat()) || | 
 |                 (w != 0 && w != mSinkBufferWidth) || | 
 |                 (h != 0 && h != mSinkBufferHeight)) { | 
 |             VDS_LOGV("dequeueBuffer: dequeueing new output buffer: " | 
 |                     "want %dx%d fmt=%d use=%#" PRIx64 ", " | 
 |                     "have %dx%d fmt=%d use=%#" PRIx64, | 
 |                     w, h, format, usage, | 
 |                     mSinkBufferWidth, mSinkBufferHeight, | 
 |                     buf->getPixelFormat(), buf->getUsage()); | 
 |             mOutputFormat = format; | 
 |             mOutputUsage = usage; | 
 |             result = refreshOutputBuffer(); | 
 |             if (result < 0) | 
 |                 return result; | 
 |         } | 
 |     } | 
 |  | 
 |     if (source == SOURCE_SINK) { | 
 |         *pslot = mOutputProducerSlot; | 
 |         *fence = mOutputFence; | 
 |     } else { | 
 |         int sslot; | 
 |         result = dequeueBuffer(source, format, usage, &sslot, fence); | 
 |         if (result >= 0) { | 
 |             *pslot = mapSource2ProducerSlot(source, sslot); | 
 |         } | 
 |     } | 
 |     return result; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::detachBuffer(int /* slot */) { | 
 |     VDS_LOGE("detachBuffer is not available for VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::detachNextBuffer( | 
 |         sp<GraphicBuffer>* /* outBuffer */, sp<Fence>* /* outFence */) { | 
 |     VDS_LOGE("detachNextBuffer is not available for VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::attachBuffer(int* /* outSlot */, | 
 |         const sp<GraphicBuffer>& /* buffer */) { | 
 |     VDS_LOGE("attachBuffer is not available for VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::queueBuffer(int pslot, | 
 |         const QueueBufferInput& input, QueueBufferOutput* output) { | 
 |     if (mDisplayId < 0) | 
 |         return mSource[SOURCE_SINK]->queueBuffer(pslot, input, output); | 
 |  | 
 |     VDS_LOGW_IF(mDbgState != DBG_STATE_GLES, | 
 |             "Unexpected queueBuffer(pslot=%d) in %s state", pslot, | 
 |             dbgStateStr()); | 
 |     mDbgState = DBG_STATE_GLES_DONE; | 
 |  | 
 |     VDS_LOGV("queueBuffer pslot=%d", pslot); | 
 |  | 
 |     status_t result; | 
 |     if (mCompositionType == COMPOSITION_MIXED) { | 
 |         // Queue the buffer back into the scratch pool | 
 |         QueueBufferOutput scratchQBO; | 
 |         int sslot = mapProducer2SourceSlot(SOURCE_SCRATCH, pslot); | 
 |         result = mSource[SOURCE_SCRATCH]->queueBuffer(sslot, input, &scratchQBO); | 
 |         if (result != NO_ERROR) | 
 |             return result; | 
 |  | 
 |         // Now acquire the buffer from the scratch pool -- should be the same | 
 |         // slot and fence as we just queued. | 
 |         Mutex::Autolock lock(mMutex); | 
 |         BufferItem item; | 
 |         result = acquireBufferLocked(&item, 0); | 
 |         if (result != NO_ERROR) | 
 |             return result; | 
 |         VDS_LOGW_IF(item.mSlot != sslot, | 
 |                 "queueBuffer: acquired sslot %d from SCRATCH after queueing sslot %d", | 
 |                 item.mSlot, sslot); | 
 |         mFbProducerSlot = mapSource2ProducerSlot(SOURCE_SCRATCH, item.mSlot); | 
 |         mFbFence = mSlots[item.mSlot].mFence; | 
 |  | 
 |     } else { | 
 |         LOG_FATAL_IF(mCompositionType != COMPOSITION_GLES, | 
 |                 "Unexpected queueBuffer in state %s for compositionType %s", | 
 |                 dbgStateStr(), dbgCompositionTypeStr(mCompositionType)); | 
 |  | 
 |         // Extract the GLES release fence for HWC to acquire | 
 |         int64_t timestamp; | 
 |         bool isAutoTimestamp; | 
 |         android_dataspace dataSpace; | 
 |         Rect crop; | 
 |         int scalingMode; | 
 |         uint32_t transform; | 
 |         input.deflate(×tamp, &isAutoTimestamp, &dataSpace, &crop, | 
 |                 &scalingMode, &transform, &mFbFence); | 
 |  | 
 |         mFbProducerSlot = pslot; | 
 |         mOutputFence = mFbFence; | 
 |     } | 
 |  | 
 |     // This moves the frame timestamps and keeps a copy of all other fields. | 
 |     *output = std::move(mQueueBufferOutput); | 
 |     return NO_ERROR; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::cancelBuffer(int pslot, | 
 |         const sp<Fence>& fence) { | 
 |     if (mDisplayId < 0) | 
 |         return mSource[SOURCE_SINK]->cancelBuffer(mapProducer2SourceSlot(SOURCE_SINK, pslot), fence); | 
 |  | 
 |     VDS_LOGW_IF(mDbgState != DBG_STATE_GLES, | 
 |             "Unexpected cancelBuffer(pslot=%d) in %s state", pslot, | 
 |             dbgStateStr()); | 
 |     VDS_LOGV("cancelBuffer pslot=%d", pslot); | 
 |     Source source = fbSourceForCompositionType(mCompositionType); | 
 |     return mSource[source]->cancelBuffer( | 
 |             mapProducer2SourceSlot(source, pslot), fence); | 
 | } | 
 |  | 
 | int VirtualDisplaySurface::query(int what, int* value) { | 
 |     switch (what) { | 
 |         case NATIVE_WINDOW_WIDTH: | 
 |             *value = mSinkBufferWidth; | 
 |             break; | 
 |         case NATIVE_WINDOW_HEIGHT: | 
 |             *value = mSinkBufferHeight; | 
 |             break; | 
 |         default: | 
 |             return mSource[SOURCE_SINK]->query(what, value); | 
 |     } | 
 |     return NO_ERROR; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::connect(const sp<IProducerListener>& listener, | 
 |         int api, bool producerControlledByApp, | 
 |         QueueBufferOutput* output) { | 
 |     QueueBufferOutput qbo; | 
 |     status_t result = mSource[SOURCE_SINK]->connect(listener, api, | 
 |             producerControlledByApp, &qbo); | 
 |     if (result == NO_ERROR) { | 
 |         updateQueueBufferOutput(std::move(qbo)); | 
 |         // This moves the frame timestamps and keeps a copy of all other fields. | 
 |         *output = std::move(mQueueBufferOutput); | 
 |     } | 
 |     return result; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::disconnect(int api, DisconnectMode mode) { | 
 |     return mSource[SOURCE_SINK]->disconnect(api, mode); | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::setSidebandStream(const sp<NativeHandle>& /*stream*/) { | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | void VirtualDisplaySurface::allocateBuffers(uint32_t /* width */, | 
 |         uint32_t /* height */, PixelFormat /* format */, uint64_t /* usage */) { | 
 |     // TODO: Should we actually allocate buffers for a virtual display? | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::allowAllocation(bool /* allow */) { | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::setGenerationNumber(uint32_t /* generation */) { | 
 |     ALOGE("setGenerationNumber not supported on VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | String8 VirtualDisplaySurface::getConsumerName() const { | 
 |     return String8("VirtualDisplaySurface"); | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::setSharedBufferMode(bool /*sharedBufferMode*/) { | 
 |     ALOGE("setSharedBufferMode not supported on VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::setAutoRefresh(bool /*autoRefresh*/) { | 
 |     ALOGE("setAutoRefresh not supported on VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::setDequeueTimeout(nsecs_t /* timeout */) { | 
 |     ALOGE("setDequeueTimeout not supported on VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::getLastQueuedBuffer( | 
 |         sp<GraphicBuffer>* /*outBuffer*/, sp<Fence>* /*outFence*/, | 
 |         float[16] /* outTransformMatrix*/) { | 
 |     ALOGE("getLastQueuedBuffer not supported on VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::getUniqueId(uint64_t* /*outId*/) const { | 
 |     ALOGE("getUniqueId not supported on VirtualDisplaySurface"); | 
 |     return INVALID_OPERATION; | 
 | } | 
 |  | 
 | void VirtualDisplaySurface::updateQueueBufferOutput( | 
 |         QueueBufferOutput&& qbo) { | 
 |     mQueueBufferOutput = std::move(qbo); | 
 |     mQueueBufferOutput.transformHint = 0; | 
 | } | 
 |  | 
 | void VirtualDisplaySurface::resetPerFrameState() { | 
 |     mCompositionType = COMPOSITION_UNKNOWN; | 
 |     mFbFence = Fence::NO_FENCE; | 
 |     mOutputFence = Fence::NO_FENCE; | 
 |     mOutputProducerSlot = -1; | 
 |     mFbProducerSlot = -1; | 
 | } | 
 |  | 
 | status_t VirtualDisplaySurface::refreshOutputBuffer() { | 
 |     if (mOutputProducerSlot >= 0) { | 
 |         mSource[SOURCE_SINK]->cancelBuffer( | 
 |                 mapProducer2SourceSlot(SOURCE_SINK, mOutputProducerSlot), | 
 |                 mOutputFence); | 
 |     } | 
 |  | 
 |     int sslot; | 
 |     status_t result = dequeueBuffer(SOURCE_SINK, mOutputFormat, mOutputUsage, | 
 |             &sslot, &mOutputFence); | 
 |     if (result < 0) | 
 |         return result; | 
 |     mOutputProducerSlot = mapSource2ProducerSlot(SOURCE_SINK, sslot); | 
 |  | 
 |     // On GLES-only frames, we don't have the right output buffer acquire fence | 
 |     // until after GLES calls queueBuffer(). So here we just set the buffer | 
 |     // (for use in HWC prepare) but not the fence; we'll call this again with | 
 |     // the proper fence once we have it. | 
 |     result = mHwc.setOutputBuffer(mDisplayId, Fence::NO_FENCE, | 
 |             mProducerBuffers[mOutputProducerSlot]); | 
 |  | 
 |     return result; | 
 | } | 
 |  | 
 | // This slot mapping function is its own inverse, so two copies are unnecessary. | 
 | // Both are kept to make the intent clear where the function is called, and for | 
 | // the (unlikely) chance that we switch to a different mapping function. | 
 | int VirtualDisplaySurface::mapSource2ProducerSlot(Source source, int sslot) { | 
 |     if (source == SOURCE_SCRATCH) { | 
 |         return BufferQueue::NUM_BUFFER_SLOTS - sslot - 1; | 
 |     } else { | 
 |         return sslot; | 
 |     } | 
 | } | 
 | int VirtualDisplaySurface::mapProducer2SourceSlot(Source source, int pslot) { | 
 |     return mapSource2ProducerSlot(source, pslot); | 
 | } | 
 |  | 
 | VirtualDisplaySurface::Source | 
 | VirtualDisplaySurface::fbSourceForCompositionType(CompositionType type) { | 
 |     return type == COMPOSITION_MIXED ? SOURCE_SCRATCH : SOURCE_SINK; | 
 | } | 
 |  | 
 | const char* VirtualDisplaySurface::dbgStateStr() const { | 
 |     switch (mDbgState) { | 
 |         case DBG_STATE_IDLE:      return "IDLE"; | 
 |         case DBG_STATE_PREPARED:  return "PREPARED"; | 
 |         case DBG_STATE_GLES:      return "GLES"; | 
 |         case DBG_STATE_GLES_DONE: return "GLES_DONE"; | 
 |         case DBG_STATE_HWC:       return "HWC"; | 
 |         default:                  return "INVALID"; | 
 |     } | 
 | } | 
 |  | 
 | const char* VirtualDisplaySurface::dbgSourceStr(Source s) { | 
 |     switch (s) { | 
 |         case SOURCE_SINK:    return "SINK"; | 
 |         case SOURCE_SCRATCH: return "SCRATCH"; | 
 |         default:             return "INVALID"; | 
 |     } | 
 | } | 
 |  | 
 | // --------------------------------------------------------------------------- | 
 | } // namespace android | 
 | // --------------------------------------------------------------------------- |