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Steve Checkoway
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/* Copyright: © Copyright 2003 Apple Computer, Inc. All rights reserved.
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
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("Apple") in consideration of your agreement to the following terms, and your
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use, installation, modification or redistribution of this Apple software
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constitutes acceptance of these terms. If you do not agree with these terms,
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please do not use, install, modify or redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and subject
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to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs
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copyrights in this original Apple software (the "Apple Software"), to use,
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reproduce, modify and redistribute the Apple Software, with or without
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modifications, in source and/or binary forms; provided that if you redistribute
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the Apple Software in its entirety and without modifications, you must retain
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this notice and the following text and disclaimers in all such redistributions of
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the Apple Software. Neither the name, trademarks, service marks or logos of
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Apple Computer, Inc. may be used to endorse or promote products derived from the
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Apple Software without specific prior written permission from Apple. Except as
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expressly stated in this notice, no other rights or licenses, express or implied,
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are granted by Apple herein, including but not limited to any patent rights that
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may be infringed by your derivative works or by other works in which the Apple
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Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
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WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
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WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
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COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
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OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
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(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*=============================================================================
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FormatConverterClient.h
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=============================================================================*/
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#ifndef __FormatConverterClient_h__
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#define __FormatConverterClient_h__
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#include <AudioToolbox/AudioConverter.h>
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#include <vector>
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// ____________________________________________________________________________
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//
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// FormatConverterClient
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// C++ wrapper for an AudioConverter
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class FormatConverterClient {
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public:
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FormatConverterClient() :
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mConverter(NULL)
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{
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}
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virtual ~FormatConverterClient()
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{
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Destroy();
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}
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virtual OSStatus Initialize(const AudioStreamBasicDescription &src, const AudioStreamBasicDescription &dest)
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{
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OSStatus err;
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Destroy();
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err = AudioConverterNew(&src, &dest, &mConverter);
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if (err) return err;
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mInputFormat = src;
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mOutputFormat = dest;
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return noErr;
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}
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void Destroy()
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{
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if (mConverter) {
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AudioConverterDispose(mConverter);
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mConverter = NULL;
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}
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}
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OSStatus Reset () const { return (mConverter ? AudioConverterReset (mConverter) : noErr); }
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OSStatus SetProperty(AudioConverterPropertyID inPropertyID,
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UInt32 inPropertyDataSize,
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const void * inPropertyData)
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{
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return AudioConverterSetProperty(mConverter, inPropertyID, inPropertyDataSize, inPropertyData);
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}
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OSStatus GetProperty(AudioConverterPropertyID inPropertyID,
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UInt32 & ioPropertyDataSize,
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void * outPropertyData)
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{
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return AudioConverterGetProperty(mConverter, inPropertyID, &ioPropertyDataSize, outPropertyData);
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}
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OSStatus GetPropertyInfo(AudioConverterPropertyID inPropertyID,
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UInt32 & outPropertyDataSize,
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Boolean & outWritable)
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{
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return AudioConverterGetPropertyInfo(mConverter, inPropertyID, &outPropertyDataSize, &outWritable);
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}
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void SetQuality(UInt32 inQuality)
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{
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SetProperty(kAudioConverterSampleRateConverterQuality, sizeof(UInt32), &inQuality );
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}
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OSStatus FillComplexBuffer( UInt32 & ioOutputDataPacketSize,
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AudioBufferList & outOutputData,
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AudioStreamPacketDescription* outPacketDescription)
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{
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OSStatus err;
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err = AudioConverterFillComplexBuffer(mConverter, InputProc, this,
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&ioOutputDataPacketSize, &outOutputData, outPacketDescription);
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return err;
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}
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const AudioStreamBasicDescription & GetInputFormat() { return mInputFormat; }
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const AudioStreamBasicDescription & GetOutputFormat() { return mOutputFormat; }
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protected:
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virtual OSStatus FormatConverterInputProc(
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UInt32 & ioNumberDataPackets,
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AudioBufferList & ioData,
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AudioStreamPacketDescription** outDataPacketDescription) = 0;
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private:
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static OSStatus InputProc( AudioConverterRef inAudioConverter,
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UInt32* ioNumberDataPackets,
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AudioBufferList* ioData,
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AudioStreamPacketDescription** outDataPacketDescription,
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void* inUserData)
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{
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OSStatus err;
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try {
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FormatConverterClient *This = (FormatConverterClient *)inUserData;
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AudioBuffer *buf = ioData->mBuffers;
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UInt32 nBytes = *ioNumberDataPackets * This->mInputFormat.mBytesPerPacket;
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for (UInt32 i = ioData->mNumberBuffers; i--; ++buf) {
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buf->mDataByteSize = nBytes;
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}
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err = This->FormatConverterInputProc(*ioNumberDataPackets, *ioData, outDataPacketDescription);
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} catch (OSStatus err) {
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return err;
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}
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catch (...) {
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return -1;
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}
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return err;
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}
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protected:
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AudioConverterRef mConverter;
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AudioStreamBasicDescription mInputFormat, mOutputFormat;
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};
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#endif // __FormatConverterClient_h__
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