1 /* 2 * Copyright (C) 2015 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 STREAM_H_ 18 #define STREAM_H_ 19 20 #include <hardware/camera3.h> 21 #include <hardware/gralloc.h> 22 #include <system/graphics.h> 23 #include <utils/Mutex.h> 24 #include <utils/Vector.h> 25 26 namespace usb_camera_hal { 27 // Stream represents a single input or output stream for a camera device. 28 class Stream { 29 public: 30 Stream(int id, camera3_stream_t *s); 31 ~Stream(); 32 33 // validate that a stream's parameters match this stream's parameters 34 bool isValidReuseStream(int id, camera3_stream_t *s); 35 36 void setUsage(uint32_t usage); 37 void setMaxBuffers(uint32_t max_buffers); 38 39 int getType(); 40 bool isInputType(); 41 bool isOutputType(); 42 const char* typeToString(int type); 43 const char* formatToString(int format); 44 void dump(int fd); 45 46 // This stream is being reused. Used in stream configuration passes 47 bool mReuse; 48 49 private: 50 // The camera device id this stream belongs to 51 const int mId; 52 // Handle to framework's stream, used as a cookie for buffers 53 camera3_stream_t *mStream; 54 // Array of handles to buffers currently in use by the stream 55 android::Vector<buffer_handle_t *> mBuffers; 56 // Lock protecting the Stream object for modifications 57 android::Mutex mLock; 58 }; 59 } // namespace usb_camera_hal 60 61 #endif // STREAM_H_ 62
