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All Rights Reserved. */ #ifdef USE_TI_MEDIA #ifndef __CAStreamBasicDescription_h__ #define __CAStreamBasicDescription_h__ #if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) #include #include #else #include "CoreAudioTypes.h" #include "CoreFoundation.h" #endif #include "CADebugMacros.h" #include // for memset, memcpy #include // for FILE * #pragma mark This file needs to compile on more earlier versions of the OS, so please keep that in mind when editing it // define Leopard specific symbols for backward compatibility if applicable #if COREAUDIOTYPES_VERSION < 1050 typedef Float32 AudioSampleType; enum { kAudioFormatFlagsCanonical = kAudioFormatFlagIsFloat | kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked }; #endif #if COREAUDIOTYPES_VERSION < 1051 typedef Float32 AudioUnitSampleType; #endif // define the IsMixable format flag for all versions of the system #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_3) enum { kIsNonMixableFlag = kAudioFormatFlagIsNonMixable }; #else enum { kIsNonMixableFlag = (1L << 6) }; #endif //============================================================================= // CAStreamBasicDescription // // This is a wrapper class for the AudioStreamBasicDescription struct. // It adds a number of convenience routines, but otherwise adds nothing // to the footprint of the original struct. //============================================================================= class CAStreamBasicDescription : public AudioStreamBasicDescription { // Constants public: static const AudioStreamBasicDescription sEmpty; // Construction/Destruction public: CAStreamBasicDescription() { memset (this, 0, sizeof(AudioStreamBasicDescription)); } CAStreamBasicDescription(const AudioStreamBasicDescription &desc) { SetFrom(desc); } CAStreamBasicDescription( double inSampleRate, UInt32 inFormatID, UInt32 inBytesPerPacket, UInt32 inFramesPerPacket, UInt32 inBytesPerFrame, UInt32 inChannelsPerFrame, UInt32 inBitsPerChannel, UInt32 inFormatFlags); // Assignment CAStreamBasicDescription& operator=(const AudioStreamBasicDescription& v) { SetFrom(v); return *this; } void SetFrom(const AudioStreamBasicDescription &desc) { memcpy(this, &desc, sizeof(AudioStreamBasicDescription)); } // _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ // // interrogation bool IsPCM() const { return mFormatID == kAudioFormatLinearPCM; } bool PackednessIsSignificant() const { Assert(IsPCM(), "PackednessIsSignificant only applies for PCM"); return (SampleWordSize() << 3) != mBitsPerChannel; } bool AlignmentIsSignificant() const { return PackednessIsSignificant() || (mBitsPerChannel & 7) != 0; } bool IsInterleaved() const { return !IsPCM() || !(mFormatFlags & kAudioFormatFlagIsNonInterleaved); } // for sanity with interleaved/deinterleaved possibilities, never access mChannelsPerFrame, use these: UInt32 NumberInterleavedChannels() const { return IsInterleaved() ? mChannelsPerFrame : 1; } UInt32 NumberChannelStreams() const { return IsInterleaved() ? 1 : mChannelsPerFrame; } UInt32 NumberChannels() const { return mChannelsPerFrame; } UInt32 SampleWordSize() const { return (mBytesPerFrame > 0 && NumberInterleavedChannels()) ? mBytesPerFrame / NumberInterleavedChannels() : 0; } UInt32 FramesToBytes(UInt32 nframes) const { return nframes * mBytesPerFrame; } UInt32 BytesToFrames(UInt32 nbytes) const { Assert(mBytesPerFrame > 0, "bytesPerFrame must be > 0 in BytesToFrames"); return nbytes / mBytesPerFrame; } bool SameChannelsAndInterleaving(const CAStreamBasicDescription &a) const { return this->NumberChannels() == a.NumberChannels() && this->IsInterleaved() == a.IsInterleaved(); } // _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ // // manipulation void SetCanonical(UInt32 nChannels, bool interleaved) // note: leaves sample rate untouched { mFormatID = kAudioFormatLinearPCM; #if CA_ENV_MACOSX int sampleSize = sizeof(Float32); mFormatFlags = kAudioFormatFlagsNativeFloatPacked; #else int sampleSize = sizeof(AudioSampleType); mFormatFlags = kAudioFormatFlagsCanonical; #endif mBitsPerChannel = 8 * sampleSize; mChannelsPerFrame = nChannels; mFramesPerPacket = 1; if (interleaved) mBytesPerPacket = mBytesPerFrame = nChannels * sampleSize; else { mBytesPerPacket = mBytesPerFrame = sampleSize; mFormatFlags |= kAudioFormatFlagIsNonInterleaved; } } bool IsCanonical() const { if (mFormatID != kAudioFormatLinearPCM) return false; UInt32 reqFormatFlags; #if (COREAUDIOTYPES_VERSION <= 1050) UInt32 flagsMask = (kLinearPCMFormatFlagIsFloat | kLinearPCMFormatFlagIsBigEndian | kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsAlignedHigh); #else UInt32 flagsMask = (kLinearPCMFormatFlagIsFloat | kLinearPCMFormatFlagIsBigEndian | kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsAlignedHigh | kLinearPCMFormatFlagsSampleFractionMask); #endif bool interleaved = (mFormatFlags & kAudioFormatFlagIsNonInterleaved) == 0; #if CA_ENV_MACOSX unsigned sampleSize = sizeof(Float32); reqFormatFlags = kAudioFormatFlagsNativeFloatPacked; #else unsigned sampleSize = sizeof(AudioSampleType); reqFormatFlags = kAudioFormatFlagsCanonical; #endif UInt32 reqFrameSize = interleaved ? (mChannelsPerFrame * sampleSize) : sampleSize; return ((mFormatFlags & flagsMask) == reqFormatFlags && mBitsPerChannel == 8 * sampleSize && mFramesPerPacket == 1 && mBytesPerFrame == reqFrameSize && mBytesPerPacket == reqFrameSize); } void SetAUCanonical(UInt32 nChannels, bool interleaved) { mFormatID = kAudioFormatLinearPCM; #if CA_PREFER_FIXED_POINT mFormatFlags = kAudioFormatFlagsCanonical | (kAudioUnitSampleFractionBits << kLinearPCMFormatFlagsSampleFractionShift); #else mFormatFlags = kAudioFormatFlagsCanonical; #endif mChannelsPerFrame = nChannels; mFramesPerPacket = 1; mBitsPerChannel = 8 * sizeof(AudioUnitSampleType); if (interleaved) mBytesPerPacket = mBytesPerFrame = nChannels * sizeof(AudioUnitSampleType); else { mBytesPerPacket = mBytesPerFrame = sizeof(AudioUnitSampleType); mFormatFlags |= kAudioFormatFlagIsNonInterleaved; } } void ChangeNumberChannels(UInt32 nChannels, bool interleaved) // alter an existing format { Assert(IsPCM(), "ChangeNumberChannels only works for PCM formats"); UInt32 wordSize = SampleWordSize(); // get this before changing ANYTHING if (wordSize == 0) wordSize = (mBitsPerChannel + 7) / 8; mChannelsPerFrame = nChannels; mFramesPerPacket = 1; if (interleaved) { mBytesPerPacket = mBytesPerFrame = nChannels * wordSize; mFormatFlags &= ~kAudioFormatFlagIsNonInterleaved; } else { mBytesPerPacket = mBytesPerFrame = wordSize; mFormatFlags |= kAudioFormatFlagIsNonInterleaved; } } // _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ // // other bool IsEqual(const AudioStreamBasicDescription &other, bool interpretingWildcards=true) const; void Print() const { Print (stdout); } void Print(FILE* file) const { PrintFormat (file, "", "AudioStreamBasicDescription:"); } void PrintFormat(FILE *f, const char *indent, const char *name) const { char buf[256]; fprintf(f, "%s%s %s\n", indent, name, AsString(buf, sizeof(buf))); } void PrintFormat2(FILE *f, const char *indent, const char *name) const { // no trailing newline char buf[256]; fprintf(f, "%s%s %s", indent, name, AsString(buf, sizeof(buf))); } char * AsString(char *buf, size_t bufsize) const; static void Print (const AudioStreamBasicDescription &inDesc) { CAStreamBasicDescription desc(inDesc); desc.Print (); } OSStatus Save(CFPropertyListRef *outData) const; OSStatus Restore(CFPropertyListRef &inData); // Operations static bool IsMixable(const AudioStreamBasicDescription& inDescription) { return (inDescription.mFormatID == kAudioFormatLinearPCM) && ((inDescription.mFormatFlags & kIsNonMixableFlag) == 0); } static void NormalizeLinearPCMFormat(AudioStreamBasicDescription& ioDescription); static void ResetFormat(AudioStreamBasicDescription& ioDescription); static void FillOutFormat(AudioStreamBasicDescription& ioDescription, const AudioStreamBasicDescription& inTemplateDescription); static void GetSimpleName(const AudioStreamBasicDescription& inDescription, char* outName, bool inAbbreviate); #if CoreAudio_Debug static void PrintToLog(const AudioStreamBasicDescription& inDesc); #endif }; bool operator<(const AudioStreamBasicDescription& x, const AudioStreamBasicDescription& y); bool operator==(const AudioStreamBasicDescription& x, const AudioStreamBasicDescription& y); #if TARGET_OS_MAC || (TARGET_OS_WIN32 && (_MSC_VER > 600)) inline bool operator!=(const AudioStreamBasicDescription& x, const AudioStreamBasicDescription& y) { return !(x == y); } inline bool operator<=(const AudioStreamBasicDescription& x, const AudioStreamBasicDescription& y) { return (x < y) || (x == y); } inline bool operator>=(const AudioStreamBasicDescription& x, const AudioStreamBasicDescription& y) { return !(x < y); } inline bool operator>(const AudioStreamBasicDescription& x, const AudioStreamBasicDescription& y) { return !((x < y) || (x == y)); } #endif bool SanityCheck(const AudioStreamBasicDescription& x); #endif // __CAStreamBasicDescription_h__ #endif