1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #ifndef __JFXMedia__AVFKernelProcessor__ 27 #define __JFXMedia__AVFKernelProcessor__ 28 29 #include "AUEffectBase.h" 30 31 32 /* 33 * Instead of writing N components that all basically function the same (at the 34 * component level), we'll skip the complexity and just write one component that 35 * handles everything by use of a abstract base class. 36 */ 37 38 /* 39 * Abstract base class used by the common AudioUnit to manage kernels. All 40 * processing states must be managed in this class, rather than using properties 41 * or parameters of the AudioUnit (since this is all private and in-process) 42 */ 43 class AVFKernelProcessor { 44 public: 45 AVFKernelProcessor() : 46 mAudioUnit(NULL) 47 {} 48 49 virtual ~AVFKernelProcessor() {} 50 51 // This is used internally, do not call directly 52 virtual void SetAudioUnit(AUEffectBase *audioUnit) { 53 mAudioUnit = audioUnit; 54 } 55 56 virtual void Reset() {} 57 58 /* 59 * Create a new processing kernel. This is called by the AudioUnit to create 60 * a kernel that will be called to process audio data. The audioUnit parameter 61 * is supplied by the component, generally you do not have to do anything with 62 * it, but it's needed for the AUKernelBase class. 63 */ 64 virtual AUKernelBase *NewKernel() { 65 return NULL; 66 } 67 68 virtual OSStatus ProcessBufferLists(AudioUnitRenderActionFlags& ioActionFlags, 69 const AudioBufferList& inBuffer, 70 AudioBufferList& outBuffer, 71 UInt32 inFramesToProcess) { 72 return noErr; 73 } 74 75 76 virtual void StreamFormatChanged(const CAStreamBasicDescription &newFormat) {} 77 78 protected: 79 AUEffectBase *mAudioUnit; 80 }; 81 82 /* 83 * Returns an instance of our common AudioUnit set up to use the given kernel 84 */ 85 extern AudioUnit NewKernelProcessorUnit(AVFKernelProcessor *kernel); 86 87 #endif /* defined(__JFXMedia__AVFKernelProcessor__) */