1 /* 2 * Copyright (C) 2013 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 24 namespace default_camera_hal { 25 // Stream represents a single input or output stream for a camera device. 26 class Stream { 27 public: 28 Stream(int id, camera3_stream_t *s); 29 ~Stream(); 30 31 // validate that astream's parameters match this stream's parameters 32 bool isValidReuseStream(int id, camera3_stream_t *s); 33 34 // Register buffers with hardware 35 int registerBuffers(const camera3_stream_buffer_set_t *buf_set); 36 37 void setUsage(uint32_t usage); 38 void setMaxBuffers(uint32_t max_buffers); 39 40 int getType(); 41 bool isInputType(); 42 bool isOutputType(); 43 bool isRegistered(); 44 45 // This stream is being reused. Used in stream configuration passes 46 bool mReuse; 47 48 private: 49 // Clean up buffer state. must be called with mMutex held. 50 void unregisterBuffers_L(); 51 52 // The camera device id this stream belongs to 53 const int mId; 54 // Handle to framework's stream, used as a cookie for buffers 55 camera3_stream_t *mStream; 56 // Stream type: CAMERA3_STREAM_* (see <hardware/camera3.h>) 57 const int mType; 58 // Width in pixels of the buffers in this stream 59 const uint32_t mWidth; 60 // Height in pixels of the buffers in this stream 61 const uint32_t mHeight; 62 // Gralloc format: HAL_PIXEL_FORMAT_* (see <system/graphics.h>) 63 const int mFormat; 64 // Gralloc usage mask : GRALLOC_USAGE_* (see <hardware/gralloc.h>) 65 uint32_t mUsage; 66 // Max simultaneous in-flight buffers for this stream 67 uint32_t mMaxBuffers; 68 // Buffers have been registered for this stream and are ready 69 bool mRegistered; 70 // Array of handles to buffers currently in use by the stream 71 buffer_handle_t **mBuffers; 72 // Number of buffers in mBuffers 73 unsigned int mNumBuffers; 74 // Lock protecting the Stream object for modifications 75 pthread_mutex_t mMutex; 76 }; 77 } // namespace default_camera_hal 78 79 #endif // STREAM_H_ 80
