00001 /* 00002 Copyright (c) 2009, The Barbarian Group 00003 All rights reserved. 00004 00005 Redistribution and use in source and binary forms, with or without modification, are permitted provided that 00006 the following conditions are met: 00007 00008 * Redistributions of source code must retain the above copyright notice, this list of conditions and 00009 the following disclaimer. 00010 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and 00011 the following disclaimer in the documentation and/or other materials provided with the distribution. 00012 00013 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED 00014 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00015 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 00016 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00017 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00018 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00019 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00020 POSSIBILITY OF SUCH DAMAGE. 00021 */ 00022 00023 #pragma once 00024 00025 #include "cinder/Cinder.h" 00026 #include "cinder/audio/PcmBuffer.h" 00027 00028 namespace cinder { namespace audio { 00029 00030 std::shared_ptr<float> calculateFft( Buffer32fRef aBuffer, uint16_t aBandCount ); 00031 00032 class FftProcessorImpl { 00033 public: 00034 FftProcessorImpl( uint16_t aBandCount ); 00035 virtual ~FftProcessorImpl() {} 00036 virtual std::shared_ptr<float> process( const float * inBuffer ) = 0; 00037 uint16_t getBandCount() const { return mBandCount; } 00038 protected: 00039 uint16_t mBandCount; 00040 }; 00041 00042 typedef std::shared_ptr<class FftProcessor> FftProcessorRef; 00043 00044 class FftProcessor { 00045 public: 00046 static const uint16_t DEFAULT_BAND_COUNT = 512; 00047 00048 static FftProcessorRef createRef( uint16_t aBandCount = DEFAULT_BAND_COUNT ); 00049 00050 std::shared_ptr<float> process( const float * inBuffer ) { return mImpl->process( inBuffer ); } 00051 uint16_t getBandCount() const { return mImpl->getBandCount(); } 00052 private: 00053 FftProcessor( uint16_t aBandCount ); 00054 std::shared_ptr<FftProcessorImpl> mImpl; 00055 }; 00056 00057 }} //namespace