VirtualDisplaySurface.cpp revision 2ba647e9f5249d9ed97739d29d879064e31ba34a
1/* 2 * Copyright 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "VirtualDisplaySurface.h" 18#include "HWComposer.h" 19 20// --------------------------------------------------------------------------- 21namespace android { 22// --------------------------------------------------------------------------- 23 24VirtualDisplaySurface::VirtualDisplaySurface(HWComposer& hwc, int32_t dispId, 25 const sp<IGraphicBufferProducer>& sink, const String8& name) 26: mHwc(hwc), 27 mDisplayId(dispId), 28 mName(name) 29{ 30 if (mDisplayId >= 0) { 31 mInterposer = new BufferQueueInterposer(sink, name); 32 mSourceProducer = mInterposer; 33 } else { 34 mSourceProducer = sink; 35 } 36} 37 38VirtualDisplaySurface::~VirtualDisplaySurface() { 39 if (mAcquiredBuffer != NULL) { 40 status_t result = mInterposer->releaseBuffer(Fence::NO_FENCE); 41 ALOGE_IF(result != NO_ERROR, "VirtualDisplaySurface \"%s\": " 42 "failed to release buffer: %d", mName.string(), result); 43 } 44} 45 46sp<IGraphicBufferProducer> VirtualDisplaySurface::getIGraphicBufferProducer() const { 47 return mSourceProducer; 48} 49 50status_t VirtualDisplaySurface::compositionComplete() { 51 return NO_ERROR; 52} 53 54status_t VirtualDisplaySurface::advanceFrame() { 55 if (mInterposer == NULL) 56 return NO_ERROR; 57 58 Mutex::Autolock lock(mMutex); 59 status_t result = NO_ERROR; 60 61 if (mAcquiredBuffer != NULL) { 62 ALOGE("VirtualDisplaySurface \"%s\": " 63 "advanceFrame called twice without onFrameCommitted", 64 mName.string()); 65 return INVALID_OPERATION; 66 } 67 68 sp<Fence> fence; 69 result = mInterposer->acquireBuffer(&mAcquiredBuffer, &fence); 70 if (result == BufferQueueInterposer::NO_BUFFER_AVAILABLE) { 71 result = mInterposer->pullEmptyBuffer(); 72 if (result != NO_ERROR) 73 return result; 74 result = mInterposer->acquireBuffer(&mAcquiredBuffer, &fence); 75 } 76 if (result != NO_ERROR) 77 return result; 78 79 result = mHwc.fbPost(mDisplayId, fence, mAcquiredBuffer); 80 if (result == NO_ERROR) { 81 result = mHwc.setOutputBuffer(mDisplayId, fence, mAcquiredBuffer); 82 } 83 return result; 84} 85 86void VirtualDisplaySurface::onFrameCommitted() { 87 if (mInterposer == NULL) 88 return; 89 90 Mutex::Autolock lock(mMutex); 91 if (mAcquiredBuffer != NULL) { 92 // fbFence signals when reads from the framebuffer are finished 93 // outFence signals when writes to the output buffer are finished 94 // It's unlikely that there will be an implementation where fbFence 95 // signals after outFence (in fact they'll typically be the same 96 // sync_pt), but just to be pedantic we merge them so the sink will 97 // be sure to wait until both are complete. 98 sp<Fence> fbFence = mHwc.getAndResetReleaseFence(mDisplayId); 99 sp<Fence> outFence = mHwc.getLastRetireFence(mDisplayId); 100 sp<Fence> fence = Fence::merge( 101 String8::format("HWC done: %.21s", mName.string()), 102 fbFence, outFence); 103 104 status_t result = mInterposer->releaseBuffer(fence); 105 ALOGE_IF(result != NO_ERROR, "VirtualDisplaySurface \"%s\": " 106 "failed to release buffer: %d", mName.string(), result); 107 mAcquiredBuffer.clear(); 108 } 109} 110 111void VirtualDisplaySurface::dump(String8& result) const { 112} 113 114// --------------------------------------------------------------------------- 115} // namespace android 116// --------------------------------------------------------------------------- 117