1 /* 2 * Copyright (C) 2012 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 18 /** 19 * This class simulates a hardware JPEG compressor. It receives image buffers 20 * in RGBA_8888 format, processes them in a worker thread, and then pushes them 21 * out to their destination stream. 22 */ 23 24 #ifndef HW_EMULATOR_CAMERA2_JPEG_H 25 #define HW_EMULATOR_CAMERA2_JPEG_H 26 27 #include "utils/Thread.h" 28 #include "utils/Mutex.h" 29 #include "utils/Timers.h" 30 31 #include "Base.h" 32 #include "../JpegCompressor.h" 33 #include <CameraMetadata.h> 34 35 #include <stdio.h> 36 37 extern "C" { 38 #include <jpeglib.h> 39 } 40 41 using ::android::hardware::camera::common::V1_0::helper::CameraMetadata; 42 43 namespace android { 44 45 class JpegCompressor: private Thread, public virtual RefBase { 46 public: 47 48 JpegCompressor(); 49 ~JpegCompressor(); 50 51 struct JpegListener { 52 // Called when JPEG compression has finished, or encountered an error 53 virtual void onJpegDone(const StreamBuffer &jpegBuffer, 54 bool success) = 0; 55 // Called when the input buffer for JPEG is not needed any more, 56 // if the buffer came from the framework. 57 virtual void onJpegInputDone(const StreamBuffer &inputBuffer) = 0; 58 virtual ~JpegListener(); 59 }; 60 61 // Start compressing COMPRESSED format buffers; JpegCompressor takes 62 // ownership of the Buffers vector. 63 // Reserve() must be called first. 64 status_t start(Buffers *buffers, JpegListener *listener, CameraMetadata* settings); 65 66 // Compress and block until buffer is complete. 67 status_t compressSynchronous(Buffers *buffers); 68 69 status_t cancel(); 70 71 bool isBusy(); 72 bool isStreamInUse(uint32_t id); 73 74 bool waitForDone(nsecs_t timeout); 75 76 // Reserve the compressor for a later start() call. 77 status_t reserve(); 78 79 // TODO: Measure this 80 static const size_t kMaxJpegSize = 300000; 81 82 private: 83 Mutex mBusyMutex; 84 bool mIsBusy; 85 Condition mDone; 86 bool mSynchronous; 87 88 Mutex mMutex; 89 90 Buffers *mBuffers; 91 JpegListener *mListener; 92 93 StreamBuffer mJpegBuffer, mAuxBuffer; 94 bool mFoundJpeg, mFoundAux; 95 CameraMetadata mSettings; 96 97 status_t compress(); 98 99 void cleanUp(); 100 101 /** 102 * Inherited Thread virtual overrides 103 */ 104 private: 105 virtual status_t readyToRun(); 106 virtual bool threadLoop(); 107 }; 108 109 } // namespace android 110 111 #endif 112