基于stm32、zigbee和MQTT的莱特智能家居控制系统，上位机使用Qt编写，内含完整源代码

/* File: CAStreamBasicDescription.cpp Abstract: Helper class for audio stream descriptions Version: 2.0 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. 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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) 2009 Apple Inc. All Rights Reserved. */ #include "CAStreamBasicDescription.h" #include "CAMath.h" #if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) #include <CoreFoundation/CFByteOrder.h> #else #include <CFByteOrder.h> #endif #if TARGET_OS_WIN32 #include <stddef.h> #endif #pragma mark This file needs to compile on earlier versions of the OS, so please keep that in mind when editing it const AudioStreamBasicDescription CAStreamBasicDescription::sEmpty = { 0.0, 0, 0, 0, 0, 0, 0, 0, 0 }; CAStreamBasicDescription::CAStreamBasicDescription(double inSampleRate, UInt32 inFormatID, UInt32 inBytesPerPacket, UInt32 inFramesPerPacket, UInt32 inBytesPerFrame, UInt32 inChannelsPerFrame, UInt32 inBitsPerChannel, UInt32 inFormatFlags) { mSampleRate = inSampleRate; mFormatID = inFormatID; mBytesPerPacket = inBytesPerPacket; mFramesPerPacket = inFramesPerPacket; mBytesPerFrame = inBytesPerFrame; mChannelsPerFrame = inChannelsPerFrame; mBitsPerChannel = inBitsPerChannel; mFormatFlags = inFormatFlags; mReserved = 0; } char *CAStreamBasicDescription::AsString(char *buf, size_t bufsize) const { char *theBuffer = buf; int nc; char formatID[5]; *(UInt32 *)formatID = CFSwapInt32HostToBig(mFormatID); formatID[4] = '\0'; nc = snprintf(buf, bufsize, "%2d ch, %6.0f Hz, '%-4.4s' (0x%08X) ", (int)NumberChannels(), mSampleRate, formatID, (int)mFormatFlags); buf += nc; bufsize -= nc; if (mFormatID == kAudioFormatLinearPCM) { bool isInt = !(mFormatFlags & kLinearPCMFormatFlagIsFloat); int wordSize = SampleWordSize(); const char *endian = (wordSize > 1) ? ((mFormatFlags & kLinearPCMFormatFlagIsBigEndian) ? " big-endian" : " little-endian" ) : ""; const char *sign = isInt ? ((mFormatFlags & kLinearPCMFormatFlagIsSignedInteger) ? " signed" : " unsigned") : ""; const char *floatInt = isInt ? "integer" : "float"; char packed[32]; if (wordSize > 0 && PackednessIsSignificant()) { if (mFormatFlags & kLinearPCMFormatFlagIsPacked) sprintf(packed, "packed in %d bytes", wordSize); else sprintf(packed, "unpacked in %d bytes", wordSize); } else packed[0] = '\0'; const char *align = (wordSize > 0 && AlignmentIsSignificant()) ? ((mFormatFlags & kLinearPCMFormatFlagIsAlignedHigh) ? " high-aligned" : " low-aligned") : ""; const char *deinter = (mFormatFlags & kAudioFormatFlagIsNonInterleaved) ? ", deinterleaved" : ""; const char *commaSpace = (packed[0]!='\0') || (align[0]!='\0') ? ", " : ""; char bitdepth[20]; #if CA_PREFER_FIXED_POINT int fracbits = (mFormatFlags & kLinearPCMFormatFlagsSampleFractionMask) >> kLinearPCMFormatFlagsSampleFractionShift; if (fracbits > 0) sprintf(bitdepth, "%d.%d", (int)mBitsPerChannel - fracbits, fracbits); else #endif sprintf(bitdepth, "%d", (int)mBitsPerChannel); nc = snprintf(buf, bufsize, "%s-bit%s%s %s%s%s%s%s", bitdepth, endian, sign, floatInt, commaSpace, packed, align, deinter); //buf += nc; bufsize -= nc; } else if (mFormatID == 'alac') { // kAudioFormatAppleLossless int sourceBits = 0; switch (mFormatFlags) { case 1: // kAppleLosslessFormatFlag_16BitSourceData sourceBits = 16; break; case 2: // kAppleLosslessFormatFlag_20BitSourceData sourceBits = 20; break; case 3: // kAppleLosslessFormatFlag_24BitSourceData sourceBits = 24; break; case 4: // kAppleLosslessFormatFlag_32BitSourceData sourceBits = 32; break; } if (sourceBits) nc = snprintf(buf, bufsize, "from %d-bit source, ", sourceBits); else nc = snprintf(buf, bufsize, "from UNKNOWN source bit depth, "); buf += nc; bufsize -= nc; nc = snprintf(buf, bufsize, "%d frames/packet", (int)mFramesPerPacket); //buf += nc; bufsize -= nc; } else nc = snprintf(buf, bufsize, "%d bits/channel, %d bytes/packet, %d frames/packet, %d bytes/frame", (int)mBitsPerChannel, (int)mBytesPerPacket, (int)mFramesPerPacket, (int)mBytesPerFrame); return theBuffer; } void CAStreamBasicDescription::NormalizeLinearPCMFormat(AudioStreamBasicDescription& ioDescription) { // the only thing that changes is to make mixable linear PCM into the canonical linear PCM format if((ioDescription.mFormatID == kAudioFormatLinearPCM) && ((ioDescription.mFormatFlags & kIsNonMixableFlag) == 0)) { // the canonical linear PCM format ioDescription.mFormatFlags = kAudioFormatFlagsCanonical; ioDescription.mBytesPerPacket = sizeof(AudioSampleType) * ioDescription.mChannelsPerFrame; ioDescription.mFramesPerPacket = 1; ioDescription.mBytesPerFrame = sizeof(AudioSampleType) * ioDescription.mChannelsPerFrame; ioDescription.mBitsPerChannel = 8 * sizeof(AudioSampleType); } } void CAStreamBasicDescription::ResetFormat(AudioStreamBasicDescription& ioDescription) { ioDescription.mSampleRate = 0; ioDescription.mFormatID = 0; ioDescription.mBytesPerPacket = 0; ioDescription.mFramesPerPacket = 0; ioDescription.mBytesPerFrame = 0; ioDescription.mChannelsPerFrame = 0; ioDescription.mBitsPerChannel = 0; ioDescription.mFormatFlags = 0; } void CAStreamBasicDescription::FillOutFormat(AudioStreamBasicDescription& ioDescription, const AudioStreamBasicDescription& inTemplateDescription) { if(fiszero(ioDescription.mSampleRate)) { ioDescription.mSampleRate = inTemplateDescription.mSampleRate; } if(ioDescription.mFormatID == 0) { ioDescription.mFormatID = inTemplateDescription.mFormatID; } if(ioDescription.mFormatFlags == 0) { ioDescription.mFormatFlags = inTemplateDescription.mFormatFlags; } if(ioDescription.mBytesPerPacket == 0) { io