1 /* 2 * Copyright (C) 2010 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 #ifndef ANDROID_GUI_SURFACETEXTURECLIENT_H 18 #define ANDROID_GUI_SURFACETEXTURECLIENT_H 19 20 #include <gui/ISurfaceTexture.h> 21 #include <gui/SurfaceTexture.h> 22 23 #include <ui/egl/android_natives.h> 24 #include <ui/Region.h> 25 26 #include <utils/RefBase.h> 27 #include <utils/threads.h> 28 29 namespace android { 30 31 class Surface; 32 33 class SurfaceTextureClient 34 : public EGLNativeBase<ANativeWindow, SurfaceTextureClient, RefBase> 35 { 36 public: 37 SurfaceTextureClient(const sp<ISurfaceTexture>& surfaceTexture); 38 39 sp<ISurfaceTexture> getISurfaceTexture() const; 40 41 protected: 42 SurfaceTextureClient(); 43 void setISurfaceTexture(const sp<ISurfaceTexture>& surfaceTexture); 44 45 private: 46 // can't be copied 47 SurfaceTextureClient& operator = (const SurfaceTextureClient& rhs); 48 SurfaceTextureClient(const SurfaceTextureClient& rhs); 49 void init(); 50 51 // ANativeWindow hooks 52 static int hook_cancelBuffer(ANativeWindow* window, ANativeWindowBuffer* buffer); 53 static int hook_dequeueBuffer(ANativeWindow* window, ANativeWindowBuffer** buffer); 54 static int hook_lockBuffer(ANativeWindow* window, ANativeWindowBuffer* buffer); 55 static int hook_perform(ANativeWindow* window, int operation, ...); 56 static int hook_query(const ANativeWindow* window, int what, int* value); 57 static int hook_queueBuffer(ANativeWindow* window, ANativeWindowBuffer* buffer); 58 static int hook_setSwapInterval(ANativeWindow* window, int interval); 59 60 int dispatchConnect(va_list args); 61 int dispatchDisconnect(va_list args); 62 int dispatchSetBufferCount(va_list args); 63 int dispatchSetBuffersGeometry(va_list args); 64 int dispatchSetBuffersDimensions(va_list args); 65 int dispatchSetBuffersFormat(va_list args); 66 int dispatchSetScalingMode(va_list args); 67 int dispatchSetBuffersTransform(va_list args); 68 int dispatchSetBuffersTimestamp(va_list args); 69 int dispatchSetCrop(va_list args); 70 int dispatchSetUsage(va_list args); 71 int dispatchLock(va_list args); 72 int dispatchUnlockAndPost(va_list args); 73 74 protected: 75 virtual int cancelBuffer(ANativeWindowBuffer* buffer); 76 virtual int dequeueBuffer(ANativeWindowBuffer** buffer); 77 virtual int lockBuffer(ANativeWindowBuffer* buffer); 78 virtual int perform(int operation, va_list args); 79 virtual int query(int what, int* value) const; 80 virtual int queueBuffer(ANativeWindowBuffer* buffer); 81 virtual int setSwapInterval(int interval); 82 83 virtual int connect(int api); 84 virtual int disconnect(int api); 85 virtual int setBufferCount(int bufferCount); 86 virtual int setBuffersDimensions(int w, int h); 87 virtual int setBuffersFormat(int format); 88 virtual int setScalingMode(int mode); 89 virtual int setBuffersTransform(int transform); 90 virtual int setBuffersTimestamp(int64_t timestamp); 91 virtual int setCrop(Rect const* rect); 92 virtual int setUsage(uint32_t reqUsage); 93 virtual int lock(ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds); 94 virtual int unlockAndPost(); 95 96 enum { MIN_UNDEQUEUED_BUFFERS = SurfaceTexture::MIN_UNDEQUEUED_BUFFERS }; 97 enum { NUM_BUFFER_SLOTS = SurfaceTexture::NUM_BUFFER_SLOTS }; 98 enum { DEFAULT_FORMAT = PIXEL_FORMAT_RGBA_8888 }; 99 100 private: 101 void freeAllBuffers(); 102 int getSlotFromBufferLocked(android_native_buffer_t* buffer) const; 103 104 // mSurfaceTexture is the interface to the surface texture server. All 105 // operations on the surface texture client ultimately translate into 106 // interactions with the server using this interface. 107 sp<ISurfaceTexture> mSurfaceTexture; 108 109 // mSlots stores the buffers that have been allocated for each buffer slot. 110 // It is initialized to null pointers, and gets filled in with the result of 111 // ISurfaceTexture::requestBuffer when the client dequeues a buffer from a 112 // slot that has not yet been used. The buffer allocated to a slot will also 113 // be replaced if the requested buffer usage or geometry differs from that 114 // of the buffer allocated to a slot. 115 sp<GraphicBuffer> mSlots[NUM_BUFFER_SLOTS]; 116 117 // mReqWidth is the buffer width that will be requested at the next dequeue 118 // operation. It is initialized to 1. 119 uint32_t mReqWidth; 120 121 // mReqHeight is the buffer height that will be requested at the next deuque 122 // operation. It is initialized to 1. 123 uint32_t mReqHeight; 124 125 // mReqFormat is the buffer pixel format that will be requested at the next 126 // deuque operation. It is initialized to PIXEL_FORMAT_RGBA_8888. 127 uint32_t mReqFormat; 128 129 // mReqUsage is the set of buffer usage flags that will be requested 130 // at the next deuque operation. It is initialized to 0. 131 uint32_t mReqUsage; 132 133 // mTimestamp is the timestamp that will be used for the next buffer queue 134 // operation. It defaults to NATIVE_WINDOW_TIMESTAMP_AUTO, which means that 135 // a timestamp is auto-generated when queueBuffer is called. 136 int64_t mTimestamp; 137 138 // mDefaultWidth is default width of the window, regardless of the 139 // native_window_set_buffers_dimensions call 140 uint32_t mDefaultWidth; 141 142 // mDefaultHeight is default width of the window, regardless of the 143 // native_window_set_buffers_dimensions call 144 uint32_t mDefaultHeight; 145 146 // mTransformHint is the transform probably applied to buffers of this 147 // window. this is only a hint, actual transform may differ. 148 uint32_t mTransformHint; 149 150 // mMutex is the mutex used to prevent concurrent access to the member 151 // variables of SurfaceTexture objects. It must be locked whenever the 152 // member variables are accessed. 153 mutable Mutex mMutex; 154 155 // must be used from the lock/unlock thread 156 sp<GraphicBuffer> mLockedBuffer; 157 sp<GraphicBuffer> mPostedBuffer; 158 mutable Region mOldDirtyRegion; 159 bool mConnectedToCpu; 160 }; 161 162 }; // namespace android 163 164 #endif // ANDROID_GUI_SURFACETEXTURECLIENT_H 165