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Diffstat (limited to 'libs/appleutility/CoreAudio105/AUOutputBL.cpp')
| -rw-r--r-- | libs/appleutility/CoreAudio105/AUOutputBL.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio105/AUOutputBL.cpp b/libs/appleutility/CoreAudio105/AUOutputBL.cpp new file mode 100644 index 0000000000..3e6444855a --- /dev/null +++ b/libs/appleutility/CoreAudio105/AUOutputBL.cpp @@ -0,0 +1,160 @@ +/* Copyright: © Copyright 2005 Apple Computer, Inc. All rights reserved. + + Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, 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 AppleÕs + 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 Computer, 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. +*/ +/*============================================================================= + AUOutputBL.h + +=============================================================================*/ +#include "AUOutputBL.h" + +/* +struct AudioBufferList +{ + UInt32 mNumberBuffers; + AudioBuffer mBuffers[1]; +}; +struct AudioBuffer +{ + UInt32 mNumberChannels; // number of interleaved channels in the buffer + UInt32 mDataByteSize; // the size of the buffer pointed to by mData + void* mData; // the pointer to the buffer +}; +*/ + +AUOutputBL::AUOutputBL (const CAStreamBasicDescription &inDesc, UInt32 inDefaultNumFrames) + : mFormat (inDesc), + mBufferMemory(NULL), + mBufferList (NULL), + mNumberBuffers (0), // keep this here, so can ensure integrity of ABL + mBufferSize (0), + mFrames(inDefaultNumFrames) +{ + mNumberBuffers = mFormat.IsInterleaved() ? 1 : mFormat.NumberChannels(); + mBufferList = reinterpret_cast<AudioBufferList*>(new Byte[sizeof(UInt32) + (mNumberBuffers * sizeof(AudioBuffer))]); +} + +AUOutputBL::~AUOutputBL() +{ + if (mBufferMemory) + delete[] mBufferMemory; + + if (mBufferList) + delete [] mBufferList; +} + +void AUOutputBL::Prepare (UInt32 inNumFrames, bool inWantNullBufferIfAllocated) +{ + UInt32 channelsPerBuffer = mFormat.IsInterleaved() ? mFormat.NumberChannels() : 1; + + if (mBufferMemory == NULL || inWantNullBufferIfAllocated) + { + mBufferList->mNumberBuffers = mNumberBuffers; + AudioBuffer *buf = &mBufferList->mBuffers[0]; + for (UInt32 i = 0; i < mNumberBuffers; ++i, ++buf) { + buf->mNumberChannels = channelsPerBuffer; + buf->mDataByteSize = mFormat.FramesToBytes (inNumFrames); + buf->mData = NULL; + } + } + else + { + UInt32 nBytes = mFormat.FramesToBytes (inNumFrames); + if ((nBytes * mNumberBuffers) > AllocatedBytes()) + throw OSStatus(-10874);//(kAudioUnitErr_TooManyFramesToProcess); + + mBufferList->mNumberBuffers = mNumberBuffers; + AudioBuffer *buf = &mBufferList->mBuffers[0]; + Byte* p = mBufferMemory; + for (UInt32 i = 0; i < mNumberBuffers; ++i, ++buf) { + buf->mNumberChannels = channelsPerBuffer; + buf->mDataByteSize = nBytes; + buf->mData = p; + p += mBufferSize; + } + } +} + + +void AUOutputBL::Allocate (UInt32 inNumFrames) +{ + if (inNumFrames) + { + UInt32 nBytes = mFormat.FramesToBytes (inNumFrames); + + if (nBytes <= AllocatedBytes()) + return; + + // align successive buffers for Altivec and to take alternating + // cache line hits by spacing them by odd multiples of 16 + if (mNumberBuffers > 1) + nBytes = (nBytes + (0x10 - (nBytes & 0xF))) | 0x10; + + mBufferSize = nBytes; + + UInt32 memorySize = mBufferSize * mNumberBuffers; + Byte *newMemory = new Byte[memorySize]; + memset(newMemory, 0, memorySize); // make buffer "hot" + + Byte *oldMemory = mBufferMemory; + mBufferMemory = newMemory; + delete[] oldMemory; + + mFrames = inNumFrames; + } + else + { + if (mBufferMemory) { + delete [] mBufferMemory; + mBufferMemory = NULL; + } + mBufferSize = 0; + mFrames = 0; + } +} + +#if DEBUG +void AUOutputBL::Print() +{ + printf ("AUOutputBL::Print\n"); + mFormat.Print(); + printf ("Num Buffers:%ld, mFrames:%ld, allocatedMemory:%c\n", mBufferList->mNumberBuffers, mFrames, (mBufferMemory != NULL ? 'T' : 'F')); + AudioBuffer *buf = &mBufferList->mBuffers[0]; + for (UInt32 i = 0; i < mBufferList->mNumberBuffers; ++i, ++buf) + printf ("\tBuffer:%ld, Size:%ld, Chans:%ld, Buffer:%X\n", i, buf->mDataByteSize, buf->mNumberChannels, int(buf->mData)); +} +#endif + |