Is it possible to use AudioThumbnail to display data from an AudioSampleBuffer?
-cpr
Is it possible to use AudioThumbnail to display data from an AudioSampleBuffer?
-cpr
Not in its current form. It could be altered to take data from other sources, but at the moment it’s really geared towards files.
ok. I think I’ll cobble together a new version for now. My needs actually require that I be able to draw pieces of the waveform in a different order (ie. sliced), or even backwards.
Has the answer to this question changed for JUCE v4.3.0?
You can use AudioThumbnail::reset() and AudioThumbnail::addBlock()
Rail
I have however found that the AudioThumbnail drawn differs between the setSource and addBlock methods…
void CWaveformWindow::setFile (const File& file, AudioSampleBuffer* pBuffer)
{
:
m_Thumbnail.reset (pBuffer->getNumChannels(), m_pParent->getSampleRate(), pBuffer->getNumSamples());
m_Thumbnail.addBlock (0, *pBuffer, 0, pBuffer->getNumSamples());
:
}
versus:
void CWaveformWindow::setFile (const File& file, AudioSampleBuffer* pBuffer)
{
:
m_Thumbnail.setSource (new FileInputSource (file));
:
}
I’ll try and make time tomorrow to track down the difference.
Cheers,
Rail
Look like the number of samples taken as a block is smaller in the second image
samplesPerThumbSample is 256 for both methods.
The data length is the same for both methods as well…
setSource:
addBlock:
I’ll get back to checking this out later tonight.
Cheers,
Rail
I suspect it has something to do with the timeToThumbSampleFactor in AudioThumbnail::refillCache() but haven’t quite figured it out yet…
Rail
sorry to revive this, but has it been addressed or is there a solution to get the same thumbnails in both cases?