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Diffstat (limited to 'libs/appleutility/CoreAudio/PublicUtility/CABufferList.cpp')
| -rw-r--r-- | libs/appleutility/CoreAudio/PublicUtility/CABufferList.cpp | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio/PublicUtility/CABufferList.cpp b/libs/appleutility/CoreAudio/PublicUtility/CABufferList.cpp new file mode 100644 index 0000000000..3249013b59 --- /dev/null +++ b/libs/appleutility/CoreAudio/PublicUtility/CABufferList.cpp @@ -0,0 +1,259 @@ +/* + File: CABufferList.cpp + Abstract: CABufferList.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 "CABufferList.h" +#include "CAByteOrder.h" + +void CABufferList::AllocateBuffers(UInt32 nBytes) +{ + if (nBytes <= GetNumBytes()) return; + + if (mABL.mNumberBuffers > 1) + // align successive buffers for Altivec and to take alternating + // cache line hits by spacing them by odd multiples of 16 + nBytes = ((nBytes + 15) & ~15) | 16; + UInt32 memorySize = nBytes * mABL.mNumberBuffers; + Byte *newMemory = new Byte[memorySize], *p = newMemory; + memset(newMemory, 0, memorySize); // get page faults now, not later + + AudioBuffer *buf = mABL.mBuffers; + for (UInt32 i = mABL.mNumberBuffers; i--; ++buf) { + if (buf->mData != NULL && buf->mDataByteSize > 0) + // preserve existing buffer contents + memcpy(p, buf->mData, buf->mDataByteSize); + buf->mDataByteSize = nBytes; + buf->mData = p; + p += nBytes; + } + Byte *oldMemory = mBufferMemory; + mBufferMemory = newMemory; + mBufferCapacity = nBytes; + delete[] oldMemory; +} + +void CABufferList::AllocateBuffersAndCopyFrom(UInt32 nBytes, CABufferList *inSrcList, CABufferList *inSetPtrList) +{ + if (mABL.mNumberBuffers != inSrcList->mABL.mNumberBuffers) return; + if (mABL.mNumberBuffers != inSetPtrList->mABL.mNumberBuffers) return; + if (nBytes <= GetNumBytes()) { + CopyAllFrom(inSrcList, inSetPtrList); + return; + } + inSetPtrList->VerifyNotTrashingOwnedBuffer(); + UInt32 fromByteSize = inSrcList->GetNumBytes(); + + if (mABL.mNumberBuffers > 1) + // align successive buffers for Altivec and to take alternating + // cache line hits by spacing them by odd multiples of 16 + nBytes = ((nBytes + 15) & ~15) | 16; + UInt32 memorySize = nBytes * mABL.mNumberBuffers; + Byte *newMemory = new Byte[memorySize], *p = newMemory; + memset(newMemory, 0, memorySize); // make buffer "hot" + + AudioBuffer *buf = mABL.mBuffers; + AudioBuffer *ptrBuf = inSetPtrList->mABL.mBuffers; + AudioBuffer *srcBuf = inSrcList->mABL.mBuffers; + for (UInt32 i = mABL.mNumberBuffers; i--; ++buf, ++ptrBuf, ++srcBuf) { + if (srcBuf->mData != NULL && srcBuf->mDataByteSize > 0) + // preserve existing buffer contents + memmove(p, srcBuf->mData, srcBuf->mDataByteSize); + buf->mDataByteSize = nBytes; + buf->mData = p; + ptrBuf->mDataByteSize = srcBuf->mDataByteSize; + ptrBuf->mData = p; + p += nBytes; + } + Byte *oldMemory = mBufferMemory; + mBufferMemory = newMemory; + mBufferCapacity = nBytes; + if (inSrcList != inSetPtrList) + inSrcList->BytesConsumed(fromByteSize); + delete[] oldMemory; +} + +void CABufferList::DeallocateBuffers() +{ + AudioBuffer *buf = mABL.mBuffers; + for (UInt32 i = mABL.mNumberBuffers; i--; ++buf) { + buf->mData = NULL; + buf->mDataByteSize = 0; + } + if (mBufferMemory != NULL) { + delete[] mBufferMemory; + mBufferMemory = NULL; + mBufferCapacity = 0; + } + +} + +static void show(const AudioBufferList &abl, int framesToPrint, int wordSize, const char *label, const char *fmtstr=NULL) +{ + printf("%s %p (%d fr%s):\n", label ? label : "AudioBufferList", &abl, framesToPrint, fmtstr ? fmtstr : ""); + const AudioBuffer *buf = abl.mBuffers; + for (UInt32 i = 0; i < abl.mNumberBuffers; ++i, ++buf) { + printf(" [%2d] %5dbytes %dch @ %p", (int)i, (int)buf->mDataByteSize, (int)buf->mNumberChannels, buf->mData); + if (framesToPrint && buf->mData != NULL) { + printf(":"); + Byte *p = (Byte *)buf->mData; + for (int j = framesToPrint * buf->mNumberChannels; --j >= 0; ) + switch (wordSize) { + case 0: // native float + printf(" %6.3f", *(Float32 *)p); + p += sizeof(Float32); + break; + // positive: big endian + case 1: + case -1: + printf(" %02X", *p); + p += 1; + break; + case 2: + printf(" %04X", CFSwapInt16BigToHost(*(UInt16 *)p)); + p += 2; + break; + case 3: + printf(" %06X", (p[0] << 16) | (p[1] << 8) | p[2]); + p += 3; + break; + case 4: + printf(" %08X", (unsigned int)CFSwapInt32BigToHost(*(UInt32 *)p)); + p += 4; + break; + case 10: + printf(" %6.3f", CASwapFloat32BigToHost(*(Float32 *)p)); + p += sizeof(Float32); + break; + case -2: + printf(" %04X", CFSwapInt16LittleToHost(*(UInt16 *)p)); + p += 2; + break; + case -3: + printf(" %06X", (p[2] << 16) | (p[1] << 8) | p[0]); + p += 3; + break; + case -4: + printf(" %08X", (unsigned int)CFSwapInt32LittleToHost(*(UInt32 *)p)); + p += 4; + break; + case -10: + printf(" %6.3f", CASwapFloat32LittleToHost(*(Float32 *)p)); + p += sizeof(Float32); + break; + } + } + printf("\n"); + } +} + +void CAShowAudioBufferList(const AudioBufferList &abl, int framesToPrint, const AudioStreamBasicDescription &asbd, const char *label) +{ + CAStreamBasicDescription fmt(asbd); + int wordSize = 1; + char fmtstr[80] = { 0 }; + + if (fmt.mFormatID == kAudioFormatLinearPCM) { + if (fmt.mFormatFlags & kLinearPCMFormatFlagIsFloat) { + if (fmt.mBitsPerChannel == 32) { + if (fmt.mFormatFlags & kLinearPCMFormatFlagIsBigEndian) { + wordSize = 10; + strlcpy(fmtstr, ", BEF", sizeof(fmtstr)); + } else { + wordSize = -10; + strlcpy(fmtstr, ", LEF", sizeof(fmtstr)); + } + } + } else { + wordSize = fmt.SampleWordSize(); + if (wordSize > 0) { + int fracbits = (asbd.mFormatFlags & kLinearPCMFormatFlagsSampleFractionMask) >> kLinearPCMFormatFlagsSampleFractionShift; + if (fracbits > 0) + snprintf(fmtstr, sizeof(fmtstr), ", %d.%d-bit", (int)asbd.mBitsPerChannel - fracbits, fracbits); + else + snprintf(fmtstr, sizeof(fmtstr), ", %d-bit", (int)asbd.mBitsPerChannel); + + if (!(fmt.mFormatFlags & kLinearPCMFormatFlagIsBigEndian)) { + wordSize = -wordSize; + strlcat(fmtstr, " LEI", sizeof(fmtstr)); + } else { + strlcat(fmtstr, " BEI", sizeof(fmtstr)); + } + } + } + } + show(abl, framesToPrint, wordSize, label, fmtstr); +} + +void CAShowAudioBufferList(const AudioBufferList &abl, int framesToPrint, int wordSize, const char *label) +{ + show(abl, framesToPrint, wordSize, label); +} + +extern "C" void CAShowAudioBufferList(const AudioBufferList *abl, int framesToPrint, int wordSize) +{ + show(*abl, framesToPrint, wordSize, NULL); +} + +// if the return result is odd, there was a null buffer. +extern "C" int CrashIfClientProvidedBogusAudioBufferList(const AudioBufferList *abl, bool nullok) +{ + const AudioBuffer *buf = abl->mBuffers, *bufend = buf + abl->mNumberBuffers; + int sum = 0; // defeat attempts by the compiler to optimize away the code that touches the buffers + int anyNull = 0; + for ( ; buf < bufend; ++buf) { + const int *p = (const int *)buf->mData; + if (p == NULL) { + anyNull = 1; + if (nullok) continue; + } + unsigned datasize = buf->mDataByteSize; + if (datasize >= sizeof(int) && p != NULL) { + sum += p[0]; + sum += p[datasize / sizeof(int) - 1]; + } + } + return anyNull | (sum & ~1); +} + |