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 38 public: 39 40 virtual ~Camera3IOStreamBase(); 41 42 /** 43 * Camera3Stream interface 44 */ 45 46 virtual void dump(int fd, const Vector<String16> &args) const; 47 48 protected: 49 size_t mTotalBufferCount; 50 // sum of input and output buffers that are currently acquired by HAL 51 size_t mHandoutTotalBufferCount; 52 // number of output buffers that are currently acquired by HAL. This will be 53 // Redundant when camera3 streams are no longer bidirectional streams. 54 size_t mHandoutOutputBufferCount; 55 Condition mBufferReturnedSignal; 56 uint32_t mFrameCount; 57 // Last received output buffer's timestamp 58 nsecs_t mLastTimestamp; 59 60 // The merged release fence for all returned buffers 61 sp<Fence> mCombinedFence; 62 63 status_t returnAnyBufferLocked( 64 const camera3_stream_buffer &buffer, 65 nsecs_t timestamp, 66 bool output); 67 68 virtual status_t returnBufferCheckedLocked( 69 const camera3_stream_buffer &buffer, 70 nsecs_t timestamp, 71 bool output, 72 /*out*/ 73 sp<Fence> *releaseFenceOut) = 0; 74 75 /** 76 * Internal Camera3Stream interface 77 */ 78 virtual bool hasOutstandingBuffersLocked() const; 79 80 virtual size_t getBufferCountLocked(); 81 82 virtual size_t getHandoutOutputBufferCountLocked(); 83 84 virtual size_t getHandoutInputBufferCountLocked(); 85 86 virtual status_t getEndpointUsage(uint32_t *usage) = 0; 87 88 status_t getBufferPreconditionCheckLocked() const; 89 status_t returnBufferPreconditionCheckLocked() const; 90 91 // State check only 92 virtual status_t configureQueueLocked(); 93 // State checks only 94 virtual status_t disconnectLocked(); 95 96 // Hand out the buffer to a native location, 97 // incrementing the internal refcount and dequeued buffer count 98 void handoutBufferLocked(camera3_stream_buffer &buffer, 99 buffer_handle_t *handle, 100 int acquire_fence, 101 int release_fence, 102 camera3_buffer_status_t status, 103 bool output); 104 105 }; // class Camera3IOStreamBase 106 107 } // namespace camera3 108 109 } // namespace android 110 111 #endif 112