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Diffstat (limited to 'widget/gonk/libdisplay/VirtualDisplaySurface.h')
| -rw-r--r-- | widget/gonk/libdisplay/VirtualDisplaySurface.h | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/widget/gonk/libdisplay/VirtualDisplaySurface.h b/widget/gonk/libdisplay/VirtualDisplaySurface.h deleted file mode 100644 index 9125d8751..000000000 --- a/widget/gonk/libdisplay/VirtualDisplaySurface.h +++ /dev/null @@ -1,250 +0,0 @@ -/* - * 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. - */ - -#ifndef ANDROID_SF_VIRTUAL_DISPLAY_SURFACE_H -#define ANDROID_SF_VIRTUAL_DISPLAY_SURFACE_H - -#include <gui/IGraphicBufferProducer.h> - -#include "DisplaySurface.h" - -// --------------------------------------------------------------------------- -namespace android { -// --------------------------------------------------------------------------- - -class HWComposer; -class IProducerListener; - -/* This DisplaySurface implementation supports virtual displays, where GLES - * and/or HWC compose into a buffer that is then passed to an arbitrary - * consumer (the sink) running in another process. - * - * The simplest case is when the virtual display will never use the h/w - * composer -- either the h/w composer doesn't support writing to buffers, or - * there are more virtual displays than it supports simultaneously. In this - * case, the GLES driver works directly with the output buffer queue, and - * calls to the VirtualDisplay from SurfaceFlinger and DisplayHardware do - * nothing. - * - * If h/w composer might be used, then each frame will fall into one of three - * configurations: GLES-only, HWC-only, and MIXED composition. In all of these, - * we must provide a FB target buffer and output buffer for the HWC set() call. - * - * In GLES-only composition, the GLES driver is given a buffer from the sink to - * render into. When the GLES driver queues the buffer to the - * VirtualDisplaySurface, the VirtualDisplaySurface holds onto it instead of - * immediately queueing it to the sink. The buffer is used as both the FB - * target and output buffer for HWC, though on these frames the HWC doesn't - * do any work for this display and doesn't write to the output buffer. After - * composition is complete, the buffer is queued to the sink. - * - * In HWC-only composition, the VirtualDisplaySurface dequeues a buffer from - * the sink and passes it to HWC as both the FB target buffer and output - * buffer. The HWC doesn't need to read from the FB target buffer, but does - * write to the output buffer. After composition is complete, the buffer is - * queued to the sink. - * - * On MIXED frames, things become more complicated, since some h/w composer - * implementations can't read from and write to the same buffer. This class has - * an internal BufferQueue that it uses as a scratch buffer pool. The GLES - * driver is given a scratch buffer to render into. When it finishes rendering, - * the buffer is queued and then immediately acquired by the - * VirtualDisplaySurface. The scratch buffer is then used as the FB target - * buffer for HWC, and a separate buffer is dequeued from the sink and used as - * the HWC output buffer. When HWC composition is complete, the scratch buffer - * is released and the output buffer is queued to the sink. - */ -class VirtualDisplaySurface : public DisplaySurface, - public BnGraphicBufferProducer { -public: - VirtualDisplaySurface(int32_t dispId, - const sp<IGraphicBufferProducer>& sink, - const sp<IGraphicBufferProducer>& bqProducer, - const sp<StreamConsumer>& bqConsumer, - const String8& name); - - // - // DisplaySurface interface - // - virtual status_t beginFrame(bool mustRecompose); - virtual status_t prepareFrame(CompositionType compositionType); - virtual status_t compositionComplete(); - virtual status_t advanceFrame(); - virtual void onFrameCommitted(); - virtual void resizeBuffers(const uint32_t w, const uint32_t h); - - virtual status_t setReleaseFenceFd(int fenceFd) { return INVALID_OPERATION; } - virtual int GetPrevDispAcquireFd() { return -1; }; - -private: - enum Source {SOURCE_SINK = 0, SOURCE_SCRATCH = 1}; - - virtual ~VirtualDisplaySurface(); - - // - // IGraphicBufferProducer interface, used by the GLES driver. - // - virtual status_t requestBuffer(int pslot, sp<GraphicBuffer>* outBuf); - virtual status_t setBufferCount(int bufferCount); - virtual status_t dequeueBuffer(int* pslot, sp<Fence>* fence, bool async, - uint32_t w, uint32_t h, uint32_t format, uint32_t usage); - virtual status_t detachBuffer(int slot); - virtual status_t detachNextBuffer(sp<GraphicBuffer>* outBuffer, - sp<Fence>* outFence); - virtual status_t attachBuffer(int* slot, const sp<GraphicBuffer>& buffer); - virtual status_t queueBuffer(int pslot, - const QueueBufferInput& input, QueueBufferOutput* output); - virtual void cancelBuffer(int pslot, const sp<Fence>& fence); - virtual int query(int what, int* value); -#if ANDROID_VERSION >= 21 - virtual status_t connect(const sp<IProducerListener>& listener, - int api, bool producerControlledByApp, QueueBufferOutput* output); -#else - virtual status_t connect(const sp<IBinder>& token, - int api, bool producerControlledByApp, QueueBufferOutput* output); -#endif - virtual status_t disconnect(int api); -#if ANDROID_VERSION >= 21 - virtual status_t setSidebandStream(const sp<NativeHandle>& stream); -#endif - virtual void allocateBuffers(bool async, uint32_t width, uint32_t height, - uint32_t format, uint32_t usage); - - // - // Utility methods - // - static Source fbSourceForCompositionType(CompositionType type); - status_t dequeueBuffer(Source source, uint32_t format, uint32_t usage, - int* sslot, sp<Fence>* fence); - void updateQueueBufferOutput(const QueueBufferOutput& qbo); - void resetPerFrameState(); - status_t refreshOutputBuffer(); - - // Both the sink and scratch buffer pools have their own set of slots - // ("source slots", or "sslot"). We have to merge these into the single - // set of slots used by the GLES producer ("producer slots" or "pslot") and - // internally in the VirtualDisplaySurface. To minimize the number of times - // a producer slot switches which source it comes from, we map source slot - // numbers to producer slot numbers differently for each source. - static int mapSource2ProducerSlot(Source source, int sslot); - static int mapProducer2SourceSlot(Source source, int pslot); - - // - // Immutable after construction - // - const int32_t mDisplayId; - const String8 mDisplayName; - sp<IGraphicBufferProducer> mSource[2]; // indexed by SOURCE_* - uint32_t mDefaultOutputFormat; - - // - // Inter-frame state - // - - // To avoid buffer reallocations, we track the buffer usage and format - // we used on the previous frame and use it again on the new frame. If - // the composition type changes or the GLES driver starts requesting - // different usage/format, we'll get a new buffer. - uint32_t mOutputFormat; - uint32_t mOutputUsage; - - // Since we present a single producer interface to the GLES driver, but - // are internally muxing between the sink and scratch producers, we have - // to keep track of which source last returned each producer slot from - // dequeueBuffer. Each bit in mProducerSlotSource corresponds to a producer - // slot. Both mProducerSlotSource and mProducerBuffers are indexed by a - // "producer slot"; see the mapSlot*() functions. - uint64_t mProducerSlotSource; - sp<GraphicBuffer> mProducerBuffers[BufferQueue::NUM_BUFFER_SLOTS]; - - // The QueueBufferOutput with the latest info from the sink, and with the - // transform hint cleared. Since we defer queueBuffer from the GLES driver - // to the sink, we have to return the previous version. - QueueBufferOutput mQueueBufferOutput; - - // Details of the current sink buffer. These become valid when a buffer is - // dequeued from the sink, and are used when queueing the buffer. - uint32_t mSinkBufferWidth, mSinkBufferHeight; - - // - // Intra-frame state - // - - // Composition type and GLES buffer source for the current frame. - // Valid after prepareFrame(), cleared in onFrameCommitted. - CompositionType mCompositionType; - - // mFbFence is the fence HWC should wait for before reading the framebuffer - // target buffer. - sp<Fence> mFbFence; - - // mOutputFence is the fence HWC should wait for before writing to the - // output buffer. - sp<Fence> mOutputFence; - - // Producer slot numbers for the buffers to use for HWC framebuffer target - // and output. - int mFbProducerSlot; - int mOutputProducerSlot; - - // Debug only -- track the sequence of events in each frame so we can make - // sure they happen in the order we expect. This class implicitly models - // a state machine; this enum/variable makes it explicit. - // - // +-----------+-------------------+-------------+ - // | State | Event || Next State | - // +-----------+-------------------+-------------+ - // | IDLE | beginFrame || BEGUN | - // | BEGUN | prepareFrame || PREPARED | - // | PREPARED | dequeueBuffer [1] || GLES | - // | PREPARED | advanceFrame [2] || HWC | - // | GLES | queueBuffer || GLES_DONE | - // | GLES_DONE | advanceFrame || HWC | - // | HWC | onFrameCommitted || IDLE | - // +-----------+-------------------++------------+ - // [1] COMPOSITION_GLES and COMPOSITION_MIXED frames. - // [2] COMPOSITION_HWC frames. - // - enum DbgState { - // no buffer dequeued, don't know anything about the next frame - DBG_STATE_IDLE, - // output buffer dequeued, framebuffer source not yet known - DBG_STATE_BEGUN, - // output buffer dequeued, framebuffer source known but not provided - // to GLES yet. - DBG_STATE_PREPARED, - // GLES driver has a buffer dequeued - DBG_STATE_GLES, - // GLES driver has queued the buffer, we haven't sent it to HWC yet - DBG_STATE_GLES_DONE, - // HWC has the buffer for this frame - DBG_STATE_HWC, - }; - DbgState mDbgState; - CompositionType mDbgLastCompositionType; - - const char* dbgStateStr() const; - static const char* dbgSourceStr(Source s); - - bool mMustRecompose; -}; - -// --------------------------------------------------------------------------- -} // namespace android -// --------------------------------------------------------------------------- - -#endif // ANDROID_SF_VIRTUAL_DISPLAY_SURFACE_H - |