1 files changed, 169 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio/PublicUtility/AUOutputBL.cpp b/libs/appleutility/CoreAudio/PublicUtility/AUOutputBL.cpp
new file mode 100644
index 0000000000..c2c8468bd9
--- /dev/null
+++ b/libs/appleutility/CoreAudio/PublicUtility/AUOutputBL.cpp
@@ -0,0 +1,169 @@
+/*
+     File: AUOutputBL.cpp
+ Abstract: AUOutputBL.h
+  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.
+ 
+*/
+#include "AUOutputBL.h"
+#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
+	#include <AudioUnit/AUComponent.h>
+#else
+	#include <AUComponent.h>
+#endif
+/*
+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[offsetof(AudioBufferList, mBuffers) + (mNumberBuffers * sizeof(AudioBuffer))]);
+}
+
+AUOutputBL::~AUOutputBL()
+{
+	if (mBufferMemory)
+		delete[] mBufferMemory;
+
+	if (mBufferList)
+		delete [] (Byte *)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(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:%d, mFrames:%d, allocatedMemory:%c\n", (int)mBufferList->mNumberBuffers, (int)mFrames, (mBufferMemory != NULL ? 'T' : 'F'));
+	AudioBuffer *buf = &mBufferList->mBuffers[0];
+	for (UInt32 i = 0; i < mBufferList->mNumberBuffers; ++i, ++buf)
+		printf ("\tBuffer:%d, Size:%d, Chans:%d, Buffer:%p\n", (int)i, (int)buf->mDataByteSize, (int)buf->mNumberChannels, buf->mData);
+}
+#endif
+