148 lines
6.6 KiB
C
148 lines
6.6 KiB
C
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/*
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File: ACBaseCodec.h
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Abstract: Part of CoreAudio Utility Classes
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Version: 1.1
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
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terms, and your use, installation, modification or redistribution of
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this Apple software constitutes acceptance of these terms. If you do
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not agree with these terms, please do not use, install, modify or
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redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and
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subject to these terms, Apple grants you a personal, non-exclusive
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license, under Apple's copyrights in this original Apple software (the
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"Apple Software"), to use, reproduce, modify and redistribute the Apple
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Software, with or without modifications, in source and/or binary forms;
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provided that if you redistribute the Apple Software in its entirety and
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without modifications, you must retain this notice and the following
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text and disclaimers in all such redistributions of the Apple Software.
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Neither the name, trademarks, service marks or logos of Apple Inc. may
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be used to endorse or promote products derived from the Apple Software
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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
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implied, are granted by Apple herein, including but not limited to any
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patent rights that may be infringed by your derivative works or by other
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works in which the Apple Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2014 Apple Inc. All Rights Reserved.
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*/
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#if !defined(__ACBaseCodec_h__)
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#define __ACBaseCodec_h__
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//=============================================================================
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// Includes
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//=============================================================================
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#include "ACCodec.h"
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#include "CAStreamBasicDescription.h"
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#include <vector>
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#include "GetCodecBundle.h"
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//=============================================================================
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// ACBaseCodec
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//
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// An abstract subclass of ACCodec that implements all the nuts and bolts
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// of the ACCodec interface, except for buffer handling. This class does
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// the proper dispatching of property requests and manages the list of
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// input and output formats.
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//=============================================================================
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class ACBaseCodec
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:
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public ACCodec
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{
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// Construction/Destruction
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public:
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ACBaseCodec( AudioComponentInstance inInstance );
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virtual ~ACBaseCodec();
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// Property Management
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public:
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virtual void GetPropertyInfo(AudioCodecPropertyID inPropertyID, UInt32& outPropertyDataSize, Boolean& outWritable);
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virtual void GetProperty(AudioCodecPropertyID inPropertyID, UInt32& ioPropertyDataSize, void* outPropertyData);
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virtual void SetProperty(AudioCodecPropertyID inPropertyID, UInt32 inPropertyDataSize, const void* inPropertyData);
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// Data Handling
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public:
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bool IsInitialized() const { return mIsInitialized; }
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virtual void Initialize(const AudioStreamBasicDescription* inInputFormat, const AudioStreamBasicDescription* inOutputFormat, const void* inMagicCookie, UInt32 inMagicCookieByteSize);
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virtual void Uninitialize();
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virtual void Reset();
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virtual UInt32 GetInputBufferByteSize() const = 0;
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virtual UInt32 GetUsedInputBufferByteSize() const = 0;
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protected:
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virtual void ReallocateInputBuffer(UInt32 inInputBufferByteSize) = 0;
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bool mIsInitialized;
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// Format Management
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public:
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UInt32 GetNumberSupportedInputFormats() const;
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void GetSupportedInputFormats(AudioStreamBasicDescription* outInputFormats, UInt32& ioNumberInputFormats) const;
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void GetCurrentInputFormat(AudioStreamBasicDescription& outInputFormat);
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virtual void SetCurrentInputFormat(const AudioStreamBasicDescription& inInputFormat);
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UInt32 GetNumberSupportedOutputFormats() const;
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void GetSupportedOutputFormats(AudioStreamBasicDescription* outOutputFormats, UInt32& ioNumberOutputFormats) const;
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void GetCurrentOutputFormat(AudioStreamBasicDescription& outOutputFormat);
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virtual void SetCurrentOutputFormat(const AudioStreamBasicDescription& inOutputFormat);
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virtual UInt32 GetMagicCookieByteSize() const;
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virtual void GetMagicCookie(void* outMagicCookieData, UInt32& ioMagicCookieDataByteSize) const;
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virtual void SetMagicCookie(const void* outMagicCookieData, UInt32 inMagicCookieDataByteSize);
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virtual bool ImplementsFeature(UInt32 /* feature */) const { return false; }
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virtual void AppendInputBufferList(const AudioBufferList * /* ioBufferList */, UInt32& /* ioNumberPackets */, const AudioStreamPacketDescription * /* inPacketDescription */, UInt32 * /* outBytesConsumed */) { CODEC_THROW(-4); /*unimpErr*/ }
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virtual UInt32 ProduceOutputBufferList(AudioBufferList * /* ioBufferList */, UInt32& /* ioNumberPackets */, AudioStreamPacketDescription * /* outPacketDescription */) { CODEC_THROW(-4); /*unimpErr*/ }
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protected:
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void AddInputFormat(const AudioStreamBasicDescription& inInputFormat);
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void AddOutputFormat(const AudioStreamBasicDescription& inOutputFormat);
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OSType GetSubType();
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typedef std::vector<CAStreamBasicDescription> FormatList;
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FormatList mInputFormatList;
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#if TARGET_OS_WIN32
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// VC 2005 screws up if this is not aligned to 8-byte boundaries
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__declspec(align(8)) CAStreamBasicDescription mInputFormat;
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#else
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CAStreamBasicDescription mInputFormat;
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#endif
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FormatList mOutputFormatList;
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#if TARGET_OS_WIN32
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// VC 2005 screws up if this is not aligned to 8-byte boundaries
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__declspec(align(8)) CAStreamBasicDescription mOutputFormat;
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#else
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CAStreamBasicDescription mOutputFormat;
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#endif
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OSType mCodecSubType;
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UInt32 mPadding[3]; // Align this with 16-byte boundaries
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};
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#endif
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