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Diffstat (limited to 'distrho/src/CoreAudio106/PublicUtility/AUOutputBL.h')
| -rwxr-xr-x | distrho/src/CoreAudio106/PublicUtility/AUOutputBL.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/distrho/src/CoreAudio106/PublicUtility/AUOutputBL.h b/distrho/src/CoreAudio106/PublicUtility/AUOutputBL.h new file mode 100755 index 00000000..3e7fe0b9 --- /dev/null +++ b/distrho/src/CoreAudio106/PublicUtility/AUOutputBL.h @@ -0,0 +1,112 @@ +/* Copyright © 2007 Apple Inc. All Rights Reserved. + + 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. +*/ +#ifndef __AUOutputBL_h__ +#define __AUOutputBL_h__ + +#include "CAStreamBasicDescription.h" +#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) +#else +#endif + +// ____________________________________________________________________________ +// +// AUOutputBL - Simple Buffer List wrapper targetted to use with retrieving AU output +// Works in one of two ways (both adjustable)... Can use it with NULL pointers, or allocate +// memory to receive the data in. + +// Before using this with any call to AudioUnitRender, it needs to be Prepared +// as some calls to AudioUnitRender can reset the ABL + +class AUOutputBL { +public: + + // you CANNOT use one of these - it will crash! +// AUOutputBL (); + + // this is the constructor that you use + // it can't be reset once you've constructed it + AUOutputBL (const CAStreamBasicDescription &inDesc, UInt32 inDefaultNumFrames = 512); + ~AUOutputBL(); + + void Prepare () + { + Prepare (mFrames); + } + + // this version can throw if this is an allocted ABL and inNumFrames is > AllocatedFrames() + // you can set the bool to true if you want a NULL buffer list even if allocated + // inNumFrames must be a valid number (will throw if inNumFrames is 0) + void Prepare (UInt32 inNumFrames, bool inWantNullBufferIfAllocated = false); + + AudioBufferList* ABL() { return mBufferList; } + + // You only need to call this if you want to allocate a buffer list + // if you want an empty buffer list, just call Prepare() + // if you want to dispose previously allocted memory, pass in 0 + // then you either have an empty buffer list, or you can re-allocate + // Memory is kept around if an Allocation request is less than what is currently allocated + void Allocate (UInt32 inNumberFrames); + + UInt32 AllocatedFrames() const { return mFrames; } + + const CAStreamBasicDescription& GetFormat() const { return mFormat; } + +#if DEBUG + void Print(); +#endif + +private: + UInt32 AllocatedBytes () const { return (mBufferSize * mNumberBuffers); } + + CAStreamBasicDescription mFormat; + Byte* mBufferMemory; + AudioBufferList* mBufferList; + UInt32 mNumberBuffers; + UInt32 mBufferSize; + UInt32 mFrames; + +// don't want to copy these.. can if you want, but more code to write! + AUOutputBL () {} + AUOutputBL (const AUOutputBL &c) {} + AUOutputBL& operator= (const AUOutputBL& c) { return *this; } +}; + +#endif // __AUOutputBL_h__ |