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 ANDROID_SERVERS_CAMERA3_IO_STREAM_BASE_H 18 #define ANDROID_SERVERS_CAMERA3_IO_STREAM_BASE_H 19 20 #include <utils/RefBase.h> 21 #include <gui/Surface.h> 22 23 #include "Camera3Stream.h" 24 25 namespace android { 26 27 namespace camera3 { 28 29 /** 30 * A base class for managing a single stream of I/O data from the camera device. 31 */ 32 class Camera3IOStreamBase : 33 public Camera3Stream { 34 protected: 35 Camera3IOStreamBase(int id, camera3_stream_type_t type, 36 uint32_t width, uint32_t height, size_t maxSize, int format, 37 android_dataspace dataSpace, camera3_stream_rotation_t rotation, 38 int setId = CAMERA3_STREAM_SET_ID_INVALID); 39 40 public: 41 42 virtual ~Camera3IOStreamBase(); 43 44 /** 45 * Camera3Stream interface 46 */ 47 48 virtual void dump(int fd, const Vector<String16> &args) const; 49 50 protected: 51 size_t mTotalBufferCount; 52 // sum of input and output buffers that are currently acquired by HAL 53 size_t mHandoutTotalBufferCount; 54 // number of output buffers that are currently acquired by HAL. This will be 55 // Redundant when camera3 streams are no longer bidirectional streams. 56 size_t mHandoutOutputBufferCount; 57 Condition mBufferReturnedSignal; 58 uint32_t mFrameCount; 59 // Last received output buffer's timestamp 60 nsecs_t mLastTimestamp; 61 62 // The merged release fence for all returned buffers 63 sp<Fence> mCombinedFence; 64 65 status_t returnAnyBufferLocked( 66 const camera3_stream_buffer &buffer, 67 nsecs_t timestamp, 68 bool output); 69 70 virtual status_t returnBufferCheckedLocked( 71 const camera3_stream_buffer &buffer, 72 nsecs_t timestamp, 73 bool output, 74 /*out*/ 75 sp<Fence> *releaseFenceOut) = 0; 76 77 /** 78 * Internal Camera3Stream interface 79 */ 80 virtual bool hasOutstandingBuffersLocked() const; 81 82 virtual size_t getBufferCountLocked(); 83 84 virtual size_t getHandoutOutputBufferCountLocked(); 85 86 virtual size_t getHandoutInputBufferCountLocked(); 87 88 virtual status_t getEndpointUsage(uint32_t *usage) const = 0; 89 90 status_t getBufferPreconditionCheckLocked() const; 91 status_t returnBufferPreconditionCheckLocked() const; 92 93 // State check only 94 virtual status_t configureQueueLocked(); 95 // State checks only 96 virtual status_t disconnectLocked(); 97 98 // Hand out the buffer to a native location, 99 // incrementing the internal refcount and dequeued buffer count 100 void handoutBufferLocked(camera3_stream_buffer &buffer, 101 buffer_handle_t *handle, 102 int acquire_fence, 103 int release_fence, 104 camera3_buffer_status_t status, 105 bool output); 106 107 }; // class Camera3IOStreamBase 108 109 } // namespace camera3 110 111 } // namespace android 112 113 #endif 114
