1 /*
2  * Copyright 2018 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 CODEC2_HIDL_V1_0_UTILS_OUTPUT_BUFFER_QUEUE
18 #define CODEC2_HIDL_V1_0_UTILS_OUTPUT_BUFFER_QUEUE
19 
20 #include <gui/IGraphicBufferProducer.h>
21 #include <codec2/hidl/1.0/types.h>
22 #include <C2Work.h>
23 
24 struct C2_HIDE _C2BlockPoolData;
25 
26 namespace android {
27 namespace hardware {
28 namespace media {
29 namespace c2 {
30 namespace V1_0 {
31 namespace utils {
32 
33 // BufferQueue-Based Block Operations
34 // ==================================
35 
36 // Manage BufferQueue and graphic blocks for both component and codec.
37 // Manage graphic blocks ownership consistently during surface change.
38 struct OutputBufferQueue {
39 
40     OutputBufferQueue();
41 
42     ~OutputBufferQueue();
43 
44     // Configure a new surface to render graphic blocks.
45     // Graphic blocks from older surface will be migrated to new surface.
46     bool configure(const sp<IGraphicBufferProducer>& igbp,
47                    uint32_t generation,
48                    uint64_t bqId);
49 
50     // Render a graphic block to current surface.
51     status_t outputBuffer(
52             const C2ConstGraphicBlock& block,
53             const BnGraphicBufferProducer::QueueBufferInput& input,
54             BnGraphicBufferProducer::QueueBufferOutput* output);
55 
56     // Call holdBufferQueueBlock() on output blocks in the given workList.
57     // The OutputBufferQueue will take the ownership of output blocks.
58     //
59     // Note: This function should be called after WorkBundle has been received
60     // from another process.
61     void holdBufferQueueBlocks(
62             const std::list<std::unique_ptr<C2Work>>& workList);
63 
64 private:
65 
66     std::mutex mMutex;
67     sp<IGraphicBufferProducer> mIgbp;
68     uint32_t mGeneration;
69     uint64_t mBqId;
70     std::shared_ptr<int> mOwner;
71     // To migrate existing buffers
72     sp<GraphicBuffer> mBuffers[BufferQueueDefs::NUM_BUFFER_SLOTS]; // find a better way
73     std::weak_ptr<_C2BlockPoolData> mPoolDatas[BufferQueueDefs::NUM_BUFFER_SLOTS];
74 
75     bool registerBuffer(const C2ConstGraphicBlock& block);
76 };
77 
78 }  // namespace utils
79 }  // namespace V1_0
80 }  // namespace c2
81 }  // namespace media
82 }  // namespace hardware
83 }  // namespace android
84 
85 #endif  // CODEC2_HIDL_V1_0_UTILS_OUTPUT_BUFFER_QUEUE
86