260 lines
8.9 KiB
C++
260 lines
8.9 KiB
C++
/*
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File: CABufferList.cpp
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Abstract: CABufferList.h
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Version: 1.1
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
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terms, and your use, installation, modification or redistribution of
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this Apple software constitutes acceptance of these terms. If you do
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not agree with these terms, please do not use, install, modify or
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redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and
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subject to these terms, Apple grants you a personal, non-exclusive
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license, under Apple's copyrights in this original Apple software (the
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"Apple Software"), to use, reproduce, modify and redistribute the Apple
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Software, with or without modifications, in source and/or binary forms;
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provided that if you redistribute the Apple Software in its entirety and
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without modifications, you must retain this notice and the following
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text and disclaimers in all such redistributions of the Apple Software.
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Neither the name, trademarks, service marks or logos of Apple Inc. may
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be used to endorse or promote products derived from the Apple Software
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without specific prior written permission from Apple. Except as
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expressly stated in this notice, no other rights or licenses, express or
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implied, are granted by Apple herein, including but not limited to any
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patent rights that may be infringed by your derivative works or by other
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works in which the Apple Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2014 Apple Inc. All Rights Reserved.
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*/
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#include "CABufferList.h"
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#include "CAByteOrder.h"
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void CABufferList::AllocateBuffers(UInt32 nBytes)
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{
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if (nBytes <= GetNumBytes()) return;
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if (mABL.mNumberBuffers > 1)
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// align successive buffers for Altivec and to take alternating
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// cache line hits by spacing them by odd multiples of 16
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nBytes = ((nBytes + 15) & ~15) | 16;
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UInt32 memorySize = nBytes * mABL.mNumberBuffers;
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Byte *newMemory = new Byte[memorySize], *p = newMemory;
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memset(newMemory, 0, memorySize); // get page faults now, not later
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AudioBuffer *buf = mABL.mBuffers;
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for (UInt32 i = mABL.mNumberBuffers; i--; ++buf) {
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if (buf->mData != NULL && buf->mDataByteSize > 0)
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// preserve existing buffer contents
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memcpy(p, buf->mData, buf->mDataByteSize);
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buf->mDataByteSize = nBytes;
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buf->mData = p;
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p += nBytes;
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}
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Byte *oldMemory = mBufferMemory;
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mBufferMemory = newMemory;
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mBufferCapacity = nBytes;
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delete[] oldMemory;
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}
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void CABufferList::AllocateBuffersAndCopyFrom(UInt32 nBytes, CABufferList *inSrcList, CABufferList *inSetPtrList)
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{
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if (mABL.mNumberBuffers != inSrcList->mABL.mNumberBuffers) return;
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if (mABL.mNumberBuffers != inSetPtrList->mABL.mNumberBuffers) return;
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if (nBytes <= GetNumBytes()) {
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CopyAllFrom(inSrcList, inSetPtrList);
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return;
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}
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inSetPtrList->VerifyNotTrashingOwnedBuffer();
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UInt32 fromByteSize = inSrcList->GetNumBytes();
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if (mABL.mNumberBuffers > 1)
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// align successive buffers for Altivec and to take alternating
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// cache line hits by spacing them by odd multiples of 16
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nBytes = ((nBytes + 15) & ~15) | 16;
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UInt32 memorySize = nBytes * mABL.mNumberBuffers;
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Byte *newMemory = new Byte[memorySize], *p = newMemory;
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memset(newMemory, 0, memorySize); // make buffer "hot"
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AudioBuffer *buf = mABL.mBuffers;
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AudioBuffer *ptrBuf = inSetPtrList->mABL.mBuffers;
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AudioBuffer *srcBuf = inSrcList->mABL.mBuffers;
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for (UInt32 i = mABL.mNumberBuffers; i--; ++buf, ++ptrBuf, ++srcBuf) {
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if (srcBuf->mData != NULL && srcBuf->mDataByteSize > 0)
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// preserve existing buffer contents
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memmove(p, srcBuf->mData, srcBuf->mDataByteSize);
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buf->mDataByteSize = nBytes;
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buf->mData = p;
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ptrBuf->mDataByteSize = srcBuf->mDataByteSize;
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ptrBuf->mData = p;
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p += nBytes;
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}
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Byte *oldMemory = mBufferMemory;
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mBufferMemory = newMemory;
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mBufferCapacity = nBytes;
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if (inSrcList != inSetPtrList)
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inSrcList->BytesConsumed(fromByteSize);
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delete[] oldMemory;
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}
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void CABufferList::DeallocateBuffers()
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{
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AudioBuffer *buf = mABL.mBuffers;
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for (UInt32 i = mABL.mNumberBuffers; i--; ++buf) {
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buf->mData = NULL;
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buf->mDataByteSize = 0;
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}
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if (mBufferMemory != NULL) {
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delete[] mBufferMemory;
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mBufferMemory = NULL;
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mBufferCapacity = 0;
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}
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}
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static void show(const AudioBufferList &abl, int framesToPrint, int wordSize, const char *label, const char *fmtstr=NULL)
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{
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printf("%s %p (%d fr%s):\n", label ? label : "AudioBufferList", &abl, framesToPrint, fmtstr ? fmtstr : "");
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const AudioBuffer *buf = abl.mBuffers;
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for (UInt32 i = 0; i < abl.mNumberBuffers; ++i, ++buf) {
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printf(" [%2d] %5dbytes %dch @ %p", (int)i, (int)buf->mDataByteSize, (int)buf->mNumberChannels, buf->mData);
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if (framesToPrint && buf->mData != NULL) {
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printf(":");
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Byte *p = (Byte *)buf->mData;
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for (int j = framesToPrint * buf->mNumberChannels; --j >= 0; )
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switch (wordSize) {
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case 0: // native float
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printf(" %6.3f", *(Float32 *)p);
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p += sizeof(Float32);
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break;
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// positive: big endian
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case 1:
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case -1:
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printf(" %02X", *p);
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p += 1;
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break;
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case 2:
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printf(" %04X", CFSwapInt16BigToHost(*(UInt16 *)p));
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p += 2;
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break;
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case 3:
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printf(" %06X", (p[0] << 16) | (p[1] << 8) | p[2]);
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p += 3;
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break;
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case 4:
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printf(" %08X", (unsigned int)CFSwapInt32BigToHost(*(UInt32 *)p));
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p += 4;
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break;
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case 10:
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printf(" %6.3f", CASwapFloat32BigToHost(*(Float32 *)p));
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p += sizeof(Float32);
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break;
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case -2:
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printf(" %04X", CFSwapInt16LittleToHost(*(UInt16 *)p));
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p += 2;
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break;
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case -3:
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printf(" %06X", (p[2] << 16) | (p[1] << 8) | p[0]);
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p += 3;
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break;
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case -4:
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printf(" %08X", (unsigned int)CFSwapInt32LittleToHost(*(UInt32 *)p));
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p += 4;
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break;
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case -10:
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printf(" %6.3f", CASwapFloat32LittleToHost(*(Float32 *)p));
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p += sizeof(Float32);
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break;
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}
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}
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printf("\n");
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}
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}
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void CAShowAudioBufferList(const AudioBufferList &abl, int framesToPrint, const AudioStreamBasicDescription &asbd, const char *label)
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{
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CAStreamBasicDescription fmt(asbd);
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int wordSize = 1;
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char fmtstr[80] = { 0 };
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if (fmt.mFormatID == kAudioFormatLinearPCM) {
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if (fmt.mFormatFlags & kLinearPCMFormatFlagIsFloat) {
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if (fmt.mBitsPerChannel == 32) {
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if (fmt.mFormatFlags & kLinearPCMFormatFlagIsBigEndian) {
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wordSize = 10;
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strlcpy(fmtstr, ", BEF", sizeof(fmtstr));
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} else {
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wordSize = -10;
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strlcpy(fmtstr, ", LEF", sizeof(fmtstr));
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}
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}
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} else {
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wordSize = fmt.SampleWordSize();
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if (wordSize > 0) {
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int fracbits = (asbd.mFormatFlags & kLinearPCMFormatFlagsSampleFractionMask) >> kLinearPCMFormatFlagsSampleFractionShift;
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if (fracbits > 0)
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snprintf(fmtstr, sizeof(fmtstr), ", %d.%d-bit", (int)asbd.mBitsPerChannel - fracbits, fracbits);
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else
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snprintf(fmtstr, sizeof(fmtstr), ", %d-bit", (int)asbd.mBitsPerChannel);
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if (!(fmt.mFormatFlags & kLinearPCMFormatFlagIsBigEndian)) {
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wordSize = -wordSize;
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strlcat(fmtstr, " LEI", sizeof(fmtstr));
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} else {
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strlcat(fmtstr, " BEI", sizeof(fmtstr));
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}
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}
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}
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}
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show(abl, framesToPrint, wordSize, label, fmtstr);
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}
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void CAShowAudioBufferList(const AudioBufferList &abl, int framesToPrint, int wordSize, const char *label)
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{
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show(abl, framesToPrint, wordSize, label);
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}
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extern "C" void CAShowAudioBufferList(const AudioBufferList *abl, int framesToPrint, int wordSize)
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{
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show(*abl, framesToPrint, wordSize, NULL);
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}
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// if the return result is odd, there was a null buffer.
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extern "C" int CrashIfClientProvidedBogusAudioBufferList(const AudioBufferList *abl, bool nullok)
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{
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const AudioBuffer *buf = abl->mBuffers, *bufend = buf + abl->mNumberBuffers;
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int sum = 0; // defeat attempts by the compiler to optimize away the code that touches the buffers
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int anyNull = 0;
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for ( ; buf < bufend; ++buf) {
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const int *p = (const int *)buf->mData;
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if (p == NULL) {
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anyNull = 1;
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if (nullok) continue;
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}
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unsigned datasize = buf->mDataByteSize;
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if (datasize >= sizeof(int) && p != NULL) {
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sum += p[0];
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sum += p[datasize / sizeof(int) - 1];
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}
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}
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return anyNull | (sum & ~1);
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}
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