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 virtual status_t detachBuffer(sp<GraphicBuffer>* buffer, int* fenceFd); 58 59 /** 60 * Return if this output stream is for video encoding. 61 */ 62 bool isVideoStream() const; 63 64 protected: 65 66 /** 67 * Note that we release the lock briefly in this function 68 */ 69 virtual status_t returnBufferCheckedLocked( 70 const camera3_stream_buffer &buffer, 71 nsecs_t timestamp, 72 bool output, 73 /*out*/ 74 sp<Fence> *releaseFenceOut); 75 76 virtual status_t disconnectLocked(); 77 78 private: 79 80 // Default dummy parameters; 320x240 is a required size for all devices, 81 // otherwise act like a SurfaceView would. 82 static const int DUMMY_WIDTH = 320; 83 static const int DUMMY_HEIGHT = 240; 84 static const int DUMMY_FORMAT = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED; 85 static const android_dataspace DUMMY_DATASPACE = HAL_DATASPACE_UNKNOWN; 86 static const camera3_stream_rotation_t DUMMY_ROTATION = CAMERA3_STREAM_ROTATION_0; 87 static const uint32_t DUMMY_USAGE = GRALLOC_USAGE_HW_COMPOSER; 88 89 /** 90 * Internal Camera3Stream interface 91 */ 92 virtual status_t getBufferLocked(camera3_stream_buffer *buffer); 93 virtual status_t returnBufferLocked( 94 const camera3_stream_buffer &buffer, 95 nsecs_t timestamp); 96 97 virtual status_t configureQueueLocked(); 98 99 virtual status_t getEndpointUsage(uint32_t *usage) const; 100 101 }; // class Camera3DummyStream 102 103 } // namespace camera3 104 105 } // namespace android 106 107 #endif 108