本文整理汇总了C++中AudioBuffer::applyGainRamp方法的典型用法代码示例。如果您正苦于以下问题：C++ AudioBuffer::applyGainRamp方法的具体用法？C++ AudioBuffer::applyGainRamp怎么用？C++ AudioBuffer::applyGainRamp使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类AudioBuffer的用法示例。
在下文中一共展示了AudioBuffer::applyGainRamp方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: audioDeviceIOCallback
void AudioSourcePlayer::audioDeviceIOCallback (const float** inputChannelData,
int totalNumInputChannels,
float** outputChannelData,
int totalNumOutputChannels,
int numSamples)
{
// these should have been prepared by audioDeviceAboutToStart()...
jassert (sampleRate > 0 && bufferSize > 0);
const ScopedLock sl (readLock);
if (source != nullptr)
{
int numActiveChans = 0, numInputs = 0, numOutputs = 0;
// messy stuff needed to compact the channels down into an array
// of non-zero pointers..
for (int i = 0; i < totalNumInputChannels; ++i)
{
if (inputChannelData[i] != nullptr)
{
inputChans [numInputs++] = inputChannelData[i];
if (numInputs >= numElementsInArray (inputChans))
break;
}
}
for (int i = 0; i < totalNumOutputChannels; ++i)
{
if (outputChannelData[i] != nullptr)
{
outputChans [numOutputs++] = outputChannelData[i];
if (numOutputs >= numElementsInArray (outputChans))
break;
}
}
if (numInputs > numOutputs)
{
// if there aren't enough output channels for the number of
// inputs, we need to create some temporary extra ones (can't
// use the input data in case it gets written to)
tempBuffer.setSize (numInputs - numOutputs, numSamples,
false, false, true);
for (int i = 0; i < numOutputs; ++i)
{
channels[numActiveChans] = outputChans[i];
memcpy (channels[numActiveChans], inputChans[i], sizeof (float) * (size_t) numSamples);
++numActiveChans;
}
for (int i = numOutputs; i < numInputs; ++i)
{
channels[numActiveChans] = tempBuffer.getWritePointer (i - numOutputs);
memcpy (channels[numActiveChans], inputChans[i], sizeof (float) * (size_t) numSamples);
++numActiveChans;
}
}
else
{
for (int i = 0; i < numInputs; ++i)
{
channels[numActiveChans] = outputChans[i];
memcpy (channels[numActiveChans], inputChans[i], sizeof (float) * (size_t) numSamples);
++numActiveChans;
}
for (int i = numInputs; i < numOutputs; ++i)
{
channels[numActiveChans] = outputChans[i];
zeromem (channels[numActiveChans], sizeof (float) * (size_t) numSamples);
++numActiveChans;
}
}
AudioBuffer<float> buffer (channels, numActiveChans, numSamples);
AudioSourceChannelInfo info (&buffer, 0, numSamples);
source->getNextAudioBlock (info);
for (int i = info.buffer->getNumChannels(); --i >= 0;)
buffer.applyGainRamp (i, info.startSample, info.numSamples, lastGain, gain);
lastGain = gain;
}
else
{
for (int i = 0; i < totalNumOutputChannels; ++i)
if (outputChannelData[i] != nullptr)
zeromem (outputChannelData[i], sizeof (float) * (size_t) numSamples);
}
}