C++ PaUtil_FreeMemory函数代码示例

void PaUtil_DiscardHighSpeedLog( LogHandle hLog )
{
    PaHighPerformanceLog* pLog = (PaHighPerformanceLog*)hLog;
    assert(pLog->magik == kMagik);
    PaUtil_FreeMemory(pLog->data);
    PaUtil_FreeMemory(pLog);
}

void PaUtil_DestroyAllocationGroup( PaUtilAllocationGroup* group )
{
    struct PaUtilAllocationGroupLink *current = group->linkBlocks;
    struct PaUtilAllocationGroupLink *next;

    while( current )
    {
        next = current->next;
        PaUtil_FreeMemory( current->buffer );
        current = next;
    }

    PaUtil_FreeMemory( group );
}

PaUtilAllocationGroup* PaUtil_CreateAllocationGroup( void )
{
    PaUtilAllocationGroup* result = 0;
    struct PaUtilAllocationGroupLink *links;


    links = AllocateLinks( PA_INITIAL_LINK_COUNT_, 0, 0 );
    if( links != 0 )
    {
        result = (PaUtilAllocationGroup*)PaUtil_AllocateMemory( sizeof(PaUtilAllocationGroup) );
        if( result )
        {
            result->linkCount = PA_INITIAL_LINK_COUNT_;
            result->linkBlocks = &links[0];
            result->spareLinks = &links[1];
            result->allocations = 0;
        }
        else
        {
            PaUtil_FreeMemory( links );
        }
    }

    return result;
}

// This is not for input-only streams, this is for streams where the input device is different from the output device
static OSStatus AudioInputProc( AudioDeviceID inDevice,
                         const AudioTimeStamp* inNow,
                         const AudioBufferList* inInputData,
                         const AudioTimeStamp* inInputTime,
                         AudioBufferList* outOutputData, 
                         const AudioTimeStamp* inOutputTime,
                         void* inClientData)
{
    PaMacClientData *clientData = (PaMacClientData *)inClientData;
    PaStreamCallbackTimeInfo *timeInfo = InitializeTimeInfo(inNow, inInputTime, inOutputTime);

    PaUtil_BeginCpuLoadMeasurement( &clientData->stream->cpuLoadMeasurer );

    AudioBuffer const *inputBuffer = &inInputData->mBuffers[0];
    unsigned long frameCount = inputBuffer->mDataByteSize / (inputBuffer->mNumberChannels * sizeof(Float32));

    CopyInputData(clientData, inInputData, frameCount);
    PaStreamCallbackResult result = clientData->callback(clientData->inputBuffer, clientData->outputBuffer, frameCount, timeInfo, paNoFlag, clientData->userData);
    
    PaUtil_EndCpuLoadMeasurement( &clientData->stream->cpuLoadMeasurer, frameCount );
    if( result == paComplete || result == paAbort )
       Pa_StopStream(clientData->stream);
    PaUtil_FreeMemory( timeInfo );
    return noErr;
}

void PaUtil_GroupFreeMemory( PaUtilAllocationGroup* group, void *buffer )
{
    struct PaUtilAllocationGroupLink *current = group->allocations;
    struct PaUtilAllocationGroupLink *previous = 0;

    if( buffer == 0 )
        return;

    /* find the right link and remove it */
    while( current )
    {
        if( current->buffer == buffer )
        {
            if( previous )
            {
                previous->next = current->next;
            }
            else
            {
                group->allocations = current->next;
            }

            current->buffer = 0;
            current->next = group->spareLinks;
            group->spareLinks = current;

            break;
        }
        
        previous = current;
        current = current->next;
    }

    PaUtil_FreeMemory( buffer ); /* free the memory whether we found it in the list or not */
}

static int KSFilterPinPropertyIdentifiersInclude( 
        HANDLE deviceHandle, int pinId, unsigned long property, const GUID *identifierSet, unsigned long identifierId  )
{
    KSMULTIPLE_ITEM* item = NULL;
    KSIDENTIFIER* identifier;
    int i;
    int result = 0;

    if( WdmGetPinPropertyMulti( deviceHandle, pinId, property, &item) != paNoError )
        return 0;
    
    identifier = (KSIDENTIFIER*)(item+1);

    for( i = 0; i < (int)item->Count; i++ )
    {
        if( !memcmp( (void*)&identifier[i].Set, (void*)identifierSet, sizeof( GUID ) ) &&
           ( identifier[i].Id == identifierId ) )
        {
            result = 1;
            break;
        }
    }

    PaUtil_FreeMemory( item );

    return result;
}

static void
Terminate(struct PaUtilHostApiRepresentation *hostApi)
{
	PaSndioHostApiRepresentation *sndioHostApi;
	sndioHostApi = (PaSndioHostApiRepresentation *)hostApi;
	free(sndioHostApi->audiodevices);
	PaUtil_FreeMemory(hostApi);
}

/*
    When CloseStream() is called, the multi-api layer ensures that
    the stream has already been stopped or aborted.
*/
static PaError CloseStream( PaStream* s )
{
    PaError result = paNoError;
    PaJackStream *stream = (PaJackStream*)s;

    PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
    PaUtil_FreeMemory( stream );

    return result;
}

static void CleanUp(PaMacCoreHostApiRepresentation *macCoreHostApi)
{
    if( macCoreHostApi->allocations )
    {
        PaUtil_FreeAllAllocations( macCoreHostApi->allocations );
        PaUtil_DestroyAllocationGroup( macCoreHostApi->allocations );
    }
    
    PaUtil_FreeMemory( macCoreHostApi );    
}

static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
{
    PaJackHostApiRepresentation *jackHostApi = (PaJackHostApiRepresentation*)hostApi;

    jack_client_close( jackHostApi->jack_client );

    if( jackHostApi->deviceInfoMemory )
    {
        PaUtil_FreeAllAllocations( jackHostApi->deviceInfoMemory );
        PaUtil_DestroyAllocationGroup( jackHostApi->deviceInfoMemory );
    }

    PaUtil_FreeMemory( jackHostApi );
}

/*
    When CloseStream() is called, the multi-api layer ensures that
    the stream has already been stopped or aborted.
*/
static PaError CloseStream( PaStream* s )
{
    PaError result = paNoError;
    PaSkeletonStream *stream = (PaSkeletonStream*)s;

    /*
        IMPLEMENT ME:
            - additional stream closing + cleanup
    */

    PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
    PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
    PaUtil_FreeMemory( stream );

    return result;
}

static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
{
    PaSkeletonHostApiRepresentation *skeletonHostApi = (PaSkeletonHostApiRepresentation*)hostApi;

    /*
        IMPLEMENT ME:
            - clean up any resourced not handled by the allocation group
    */

    if( skeletonHostApi->allocations )
    {
        PaUtil_FreeAllAllocations( skeletonHostApi->allocations );
        PaUtil_DestroyAllocationGroup( skeletonHostApi->allocations );
    }

    PaUtil_FreeMemory( skeletonHostApi );
}

static OSStatus CheckFormat(AudioDeviceID macCoreDeviceId, const PaStreamParameters *parameters, double sampleRate, int isInput)
{
    UInt32 propSize = sizeof(AudioStreamBasicDescription);
    AudioStreamBasicDescription *streamDescription = PaUtil_AllocateMemory(propSize);

    streamDescription->mSampleRate = sampleRate;
    streamDescription->mFormatID = 0;
    streamDescription->mFormatFlags = 0;
    streamDescription->mBytesPerPacket = 0;
    streamDescription->mFramesPerPacket = 0;
    streamDescription->mBytesPerFrame = 0;
    streamDescription->mChannelsPerFrame = 0;
    streamDescription->mBitsPerChannel = 0;
    streamDescription->mReserved = 0;

    OSStatus result = AudioDeviceGetProperty(macCoreDeviceId, 0, isInput, kAudioDevicePropertyStreamFormatSupported, &propSize, streamDescription);
    PaUtil_FreeMemory(streamDescription);
    return result;
}

static PaTime GetStreamTime( PaStream *s )
{
    OSStatus err;
    PaTime result;
    PaMacCoreStream *stream = (PaMacCoreStream*)s;

    AudioTimeStamp *timeStamp = PaUtil_AllocateMemory(sizeof(AudioTimeStamp));
    if (stream->inputDevice != kAudioDeviceUnknown) {
        err = AudioDeviceGetCurrentTime(stream->inputDevice, timeStamp);
    }
    else {
        err = AudioDeviceGetCurrentTime(stream->outputDevice, timeStamp);
    }
    
    result = err ? 0 : timeStamp->mSampleTime;
    PaUtil_FreeMemory(timeStamp);

    return result;
}

static PaError
CloseStream(PaStream *stream)
{
	PaSndioStream *s = (PaSndioStream *)stream;

	DPR("CloseStream:\n");

	if (!s->stopped)
		StopStream(stream);

	if (s->mode & SIO_REC)
		free(s->rbuf);
	if (s->mode & SIO_PLAY)
		free(s->wbuf);
	sio_close(s->hdl);
        PaUtil_TerminateStreamRepresentation(&s->base);
	PaUtil_TerminateBufferProcessor(&s->bufproc);
	PaUtil_FreeMemory(s);
	return paNoError;
}