QtMultimediaInternal::QAudioBufferList Class Reference

Public Functions
AudioBufferList *	audioBufferList () const
qint64	bufferSize (int buffer=0) const
char *	data (int buffer=0) const
int	frameCount (int buffer=0) const
int	packetCount (int buffer=0) const
int	packetSize () const
	QAudioBufferList (AudioStreamBasicDescription const &streamFormat)
	QAudioBufferList (AudioStreamBasicDescription const &streamFormat, char *buffer, int bufferSize)
	QAudioBufferList (AudioStreamBasicDescription const &streamFormat, int framesToBuffer)
void	reset ()
	~QAudioBufferList ()

Properties
AudioBufferList *	bfs
int	dataSize
bool	owner
AudioStreamBasicDescription	sf

Detailed Description

Definition at line 71 of file qaudioinput_mac_p.cpp.

Constructors and Destructors

QAudioBufferList() [1/3]

QtMultimediaInternal::QAudioBufferList::QAudioBufferList ( AudioStreamBasicDescription const &  streamFormat )

inline

Definition at line 74 of file qaudioinput_mac_p.cpp.

Referenced by QtMultimediaInternal::QAudioInputBuffer::QAudioInputBuffer().

                                                                     :
        owner(false),
        sf(streamFormat)
    {
        const bool isInterleaved = (sf.mFormatFlags & kAudioFormatFlagIsNonInterleaved) == 0;
        const int numberOfBuffers = isInterleaved ? 1 : sf.mChannelsPerFrame;

        dataSize = 0;

        bfs = reinterpret_cast<AudioBufferList*>(qMalloc(sizeof(AudioBufferList) +
                                                                (sizeof(AudioBuffer) * numberOfBuffers)));

        bfs->mNumberBuffers = numberOfBuffers;
        for (int i = 0; i < numberOfBuffers; ++i) {
            bfs->mBuffers[i].mNumberChannels = isInterleaved ? numberOfBuffers : 1;
            bfs->mBuffers[i].mDataByteSize = 0;
            bfs->mBuffers[i].mData = 0;
        }
    }

QAudioBufferList() [2/3]

QtMultimediaInternal::QAudioBufferList::QAudioBufferList ( AudioStreamBasicDescription const &  streamFormat, char *  buffer, int  bufferSize  )

inline

Definition at line 94 of file qaudioinput_mac_p.cpp.

                                                                                                   :
        owner(false),
        sf(streamFormat),
        bfs(0)
    {
        dataSize = bufferSize;

        bfs = reinterpret_cast<AudioBufferList*>(qMalloc(sizeof(AudioBufferList) + sizeof(AudioBuffer)));

        bfs->mNumberBuffers = 1;
        bfs->mBuffers[0].mNumberChannels = 1;
        bfs->mBuffers[0].mDataByteSize = dataSize;
        bfs->mBuffers[0].mData = buffer;
    }

QAudioBufferList() [3/3]

QtMultimediaInternal::QAudioBufferList::QAudioBufferList ( AudioStreamBasicDescription const &  streamFormat, int  framesToBuffer  )

inline

Definition at line 109 of file qaudioinput_mac_p.cpp.

                                                                                         :
        owner(true),
        sf(streamFormat),
        bfs(0)
    {
        const bool isInterleaved = (sf.mFormatFlags & kAudioFormatFlagIsNonInterleaved) == 0;
        const int numberOfBuffers = isInterleaved ? 1 : sf.mChannelsPerFrame;

        dataSize = framesToBuffer * sf.mBytesPerFrame;

        bfs = reinterpret_cast<AudioBufferList*>(qMalloc(sizeof(AudioBufferList) +
                                                                (sizeof(AudioBuffer) * numberOfBuffers)));
        bfs->mNumberBuffers = numberOfBuffers;
        for (int i = 0; i < numberOfBuffers; ++i) {
            bfs->mBuffers[i].mNumberChannels = isInterleaved ? numberOfBuffers : 1;
            bfs->mBuffers[i].mDataByteSize = dataSize;
            bfs->mBuffers[i].mData = qMalloc(dataSize);
        }
    }

~QAudioBufferList()

QtMultimediaInternal::QAudioBufferList::~QAudioBufferList ( )

inline

Definition at line 129 of file qaudioinput_mac_p.cpp.

    {
        if (owner) {
            for (UInt32 i = 0; i < bfs->mNumberBuffers; ++i)
                qFree(bfs->mBuffers[i].mData);
        }

        qFree(bfs);
    }

Functions

audioBufferList()

AudioBufferList* QtMultimediaInternal::QAudioBufferList::audioBufferList ( ) const

inline

Definition at line 139 of file qaudioinput_mac_p.cpp.

Referenced by QtMultimediaInternal::QAudioPacketFeeder::feed(), and QtMultimediaInternal::QAudioPacketFeeder::QAudioPacketFeeder().

    {
        return bfs;
    }

bufferSize()

qint64 QtMultimediaInternal::QAudioBufferList::bufferSize ( int  buffer = 0 ) const

inline

Definition at line 149 of file qaudioinput_mac_p.cpp.

Referenced by QAudioBufferList().

    {
        return bfs->mBuffers[buffer].mDataByteSize;
    }

data()

char* QtMultimediaInternal::QAudioBufferList::data ( int  buffer = 0 ) const

inline

Definition at line 144 of file qaudioinput_mac_p.cpp.

    {
        return static_cast<char*>(bfs->mBuffers[buffer].mData);
    }

frameCount()

int QtMultimediaInternal::QAudioBufferList::frameCount ( int  buffer = 0 ) const

inline

Definition at line 154 of file qaudioinput_mac_p.cpp.

    {
        return bfs->mBuffers[buffer].mDataByteSize / sf.mBytesPerFrame;
    }

packetCount()

int QtMultimediaInternal::QAudioBufferList::packetCount ( int  buffer = 0 ) const

inline

Definition at line 159 of file qaudioinput_mac_p.cpp.

Referenced by QtMultimediaInternal::QAudioPacketFeeder::feed().

    {
        return bfs->mBuffers[buffer].mDataByteSize / sf.mBytesPerPacket;
    }

packetSize()

int QtMultimediaInternal::QAudioBufferList::packetSize ( ) const

inline

Definition at line 164 of file qaudioinput_mac_p.cpp.

Referenced by QtMultimediaInternal::QAudioInputBuffer::renderFromDevice().

    {
        return sf.mBytesPerPacket;
    }

reset()

void QtMultimediaInternal::QAudioBufferList::reset ( )

inline

Definition at line 169 of file qaudioinput_mac_p.cpp.

    {
        for (UInt32 i = 0; i < bfs->mNumberBuffers; ++i) {
            bfs->mBuffers[i].mDataByteSize = dataSize;
            bfs->mBuffers[i].mData = 0;
        }
    }

Properties

bfs

AudioBufferList* QtMultimediaInternal::QAudioBufferList::bfs

private

Definition at line 181 of file qaudioinput_mac_p.cpp.

Referenced by audioBufferList(), bufferSize(), data(), frameCount(), packetCount(), QAudioBufferList(), reset(), and ~QAudioBufferList().

dataSize

int QtMultimediaInternal::QAudioBufferList::dataSize

private

Definition at line 179 of file qaudioinput_mac_p.cpp.

Referenced by QAudioBufferList(), and reset().

owner

bool QtMultimediaInternal::QAudioBufferList::owner

private

Definition at line 178 of file qaudioinput_mac_p.cpp.

Referenced by ~QAudioBufferList().

sf

AudioStreamBasicDescription QtMultimediaInternal::QAudioBufferList::sf

private

Definition at line 180 of file qaudioinput_mac_p.cpp.

Referenced by frameCount(), packetCount(), packetSize(), and QAudioBufferList().

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The documentation for this class was generated from the following file:

• /src/multimedia/audio/qaudioinput_mac_p.cpp