1 /*
2  * Copyright (C) 2019 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 <gui/BufferQueue.h>
18 
19 namespace android {
20 
21 class HostBufferQueue : public IGraphicBufferProducer, public IGraphicBufferConsumer {
22 public:
23     HostBufferQueue() : mWidth(0), mHeight(0) { }
24 
25     virtual status_t setConsumerIsProtected(bool isProtected) { return OK; }
26 
27     virtual status_t detachBuffer(int slot) { return OK; }
28 
29     virtual status_t getReleasedBuffers(uint64_t* slotMask) { return OK; }
30 
31     virtual status_t setDefaultBufferSize(uint32_t w, uint32_t h) {
32         mWidth = w;
33         mHeight = h;
34         mBuffer = sp<GraphicBuffer>(new GraphicBuffer(mWidth, mHeight));
35         return OK;
36     }
37 
38     virtual status_t setDefaultBufferFormat(PixelFormat defaultFormat) { return OK; }
39 
40     virtual status_t setDefaultBufferDataSpace(android_dataspace defaultDataSpace) { return OK; }
41 
42     virtual status_t discardFreeBuffers() { return OK; }
43 
44     virtual status_t acquireBuffer(BufferItem* buffer, nsecs_t presentWhen,
45                                        uint64_t maxFrameNumber = 0) {
46         buffer->mGraphicBuffer = mBuffer;
47         buffer->mSlot = 0;
48         return OK;
49     }
50 
51     virtual status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers) { return OK; }
52 
53     virtual status_t setConsumerUsageBits(uint64_t usage) { return OK; }
54 private:
55     sp<GraphicBuffer> mBuffer;
56     uint32_t mWidth;
57     uint32_t mHeight;
58 };
59 
60 void BufferQueue::createBufferQueue(sp<IGraphicBufferProducer>* outProducer,
61         sp<IGraphicBufferConsumer>* outConsumer) {
62 
63     sp<HostBufferQueue> obj(new HostBufferQueue());
64 
65     *outProducer = obj;
66     *outConsumer = obj;
67 }
68 
69 } // namespace android
70