diff options
Diffstat (limited to 'libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.h')
| -rw-r--r-- | libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.h b/libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.h new file mode 100644 index 0000000000..f41fe54b93 --- /dev/null +++ b/libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.h @@ -0,0 +1,105 @@ +/* + 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 |