1 /* 2 * Copyright (C) 2014 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_SERVERS_CAMERA3_DUMMY_STREAM_H 18 #define ANDROID_SERVERS_CAMERA3_DUMMY_STREAM_H 19 20 #include <utils/RefBase.h> 21 #include <gui/Surface.h> 22 23 #include "Camera3Stream.h" 24 #include "Camera3IOStreamBase.h" 25 #include "Camera3OutputStreamInterface.h" 26 27 namespace android { 28 namespace camera3 { 29 30 /** 31 * A dummy output stream class, to be used as a placeholder when no valid 32 * streams are configured by the client. 33 * This is necessary because camera HAL v3.2 or older disallow configuring 34 * 0 output streams, while the public camera2 API allows for it. 35 */ 36 class Camera3DummyStream : 37 public Camera3IOStreamBase, 38 public Camera3OutputStreamInterface { 39 40 public: 41 /** 42 * Set up a dummy stream; doesn't actually connect to anything, and uses 43 * a default dummy format and size. 44 */ 45 Camera3DummyStream(int id); 46 47 virtual ~Camera3DummyStream(); 48 49 /** 50 * Camera3Stream interface 51 */ 52 53 virtual void dump(int fd, const Vector<String16> &args) const; 54 55 status_t setTransform(int transform); 56 57 protected: 58 59 /** 60 * Note that we release the lock briefly in this function 61 */ 62 virtual status_t returnBufferCheckedLocked( 63 const camera3_stream_buffer &buffer, 64 nsecs_t timestamp, 65 bool output, 66 /*out*/ 67 sp<Fence> *releaseFenceOut); 68 69 virtual status_t disconnectLocked(); 70 71 private: 72 73 // Default dummy parameters; 320x240 is a required size for all devices, 74 // otherwise act like a SurfaceView would. 75 static const int DUMMY_WIDTH = 320; 76 static const int DUMMY_HEIGHT = 240; 77 static const int DUMMY_FORMAT = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED; 78 static const uint32_t DUMMY_USAGE = GRALLOC_USAGE_HW_COMPOSER; 79 80 /** 81 * Internal Camera3Stream interface 82 */ 83 virtual status_t getBufferLocked(camera3_stream_buffer *buffer); 84 virtual status_t returnBufferLocked( 85 const camera3_stream_buffer &buffer, 86 nsecs_t timestamp); 87 88 virtual status_t configureQueueLocked(); 89 90 virtual status_t getEndpointUsage(uint32_t *usage); 91 92 }; // class Camera3DummyStream 93 94 } // namespace camera3 95 96 } // namespace android 97 98 #endif 99
