106 lines
4.7 KiB
C++
106 lines
4.7 KiB
C++
/*
|
|
File: ACSimpleCodec.h
|
|
Abstract: Part of CoreAudio Utility Classes
|
|
Version: 1.1
|
|
|
|
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
|
|
Inc. ("Apple") in consideration of your agreement to the following
|
|
terms, and your use, installation, modification or redistribution of
|
|
this Apple software constitutes acceptance of these terms. If you do
|
|
not agree with these terms, please do not use, install, modify or
|
|
redistribute this Apple software.
|
|
|
|
In consideration of your agreement to abide by the following terms, and
|
|
subject to these terms, Apple grants you a personal, non-exclusive
|
|
license, under Apple's copyrights in this original Apple software (the
|
|
"Apple Software"), to use, reproduce, modify and redistribute the Apple
|
|
Software, with or without modifications, in source and/or binary forms;
|
|
provided that if you redistribute the Apple Software in its entirety and
|
|
without modifications, you must retain this notice and the following
|
|
text and disclaimers in all such redistributions of the Apple Software.
|
|
Neither the name, trademarks, service marks or logos of Apple Inc. may
|
|
be used to endorse or promote products derived from the Apple Software
|
|
without specific prior written permission from Apple. Except as
|
|
expressly stated in this notice, no other rights or licenses, express or
|
|
implied, are granted by Apple herein, including but not limited to any
|
|
patent rights that may be infringed by your derivative works or by other
|
|
works in which the Apple Software may be incorporated.
|
|
|
|
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
|
|
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
|
|
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
|
|
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
|
|
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
|
|
|
|
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
|
|
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
|
|
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
|
|
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
|
|
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
Copyright (C) 2014 Apple Inc. All Rights Reserved.
|
|
|
|
*/
|
|
#if !defined(__ACSimpleCodec_h__)
|
|
#define __ACSimpleCodec_h__
|
|
|
|
//=============================================================================
|
|
// Includes
|
|
//=============================================================================
|
|
|
|
#include "ACBaseCodec.h"
|
|
|
|
//=============================================================================
|
|
// ACSimpleCodec
|
|
//
|
|
// This extension of ACBaseCodec provides for a simple ring buffer to handle
|
|
// input data.
|
|
//=============================================================================
|
|
|
|
class ACSimpleCodec
|
|
:
|
|
public ACBaseCodec
|
|
{
|
|
|
|
// Construction/Destruction
|
|
public:
|
|
ACSimpleCodec(UInt32 inInputBufferByteSize, AudioComponentInstance inInstance);
|
|
virtual ~ACSimpleCodec();
|
|
|
|
// Data Handling
|
|
public:
|
|
virtual void Initialize(const AudioStreamBasicDescription* inInputFormat, const AudioStreamBasicDescription* inOutputFormat, const void* inMagicCookie, UInt32 inMagicCookieByteSize) = 0;
|
|
virtual void Uninitialize();
|
|
virtual void Reset();
|
|
|
|
virtual void AppendInputData(const void* inInputData, UInt32& ioInputDataByteSize, UInt32& ioNumberPackets, const AudioStreamPacketDescription* inPacketDescription);
|
|
virtual void ZeroPadInputData(UInt32& ioNumberPackets, const AudioStreamPacketDescription* inPacketDescription);
|
|
virtual UInt32 GetInputBufferByteSize() const;
|
|
virtual UInt32 GetUsedInputBufferByteSize() const;
|
|
virtual void GetPropertyInfo(AudioCodecPropertyID inPropertyID, UInt32& outPropertyDataSize, Boolean& outWritable);
|
|
virtual void SetProperty(AudioCodecPropertyID inPropertyID, UInt32 inPropertyDataSize, const void* inPropertyData);
|
|
|
|
protected:
|
|
void ConsumeInputData(UInt32 inConsumedByteSize);
|
|
Byte* GetInputBufferStart() const { return mInputBuffer + mInputBufferStart; }
|
|
UInt32 GetInputBufferContiguousByteSize() const { return (mInputBufferStart <= mInputBufferEnd) ? (mInputBufferEnd - mInputBufferStart) : (mInputBufferByteSize - mInputBufferStart); }
|
|
virtual void ReallocateInputBuffer(UInt32 inInputBufferByteSize);
|
|
|
|
// returns a pointer to contiguous bytes.
|
|
// will do some copying if the request wraps around the internal buffer.
|
|
// request must be less than available bytes
|
|
Byte* GetBytes(UInt32& ioNumberBytes) const;
|
|
|
|
private:
|
|
Byte* mInputBuffer;
|
|
UInt32 mInputBufferByteSize;
|
|
UInt32 mInputBufferStart;
|
|
UInt32 mInputBufferEnd;
|
|
|
|
};
|
|
|
|
#endif
|