3/7/2024 0 Comments Xojo install plugin![]() ![]() So the pixels are hold in a CGBitmapContext for the actual picture. ![]() On MacOS the picture class implementation for an editable picture uses both a CGBitmapContext for the pixels and a CGImage for drawing it. Let's check how the implementations have an effect on memory consumption. The Xojo picture class internally has several platform dependent implementations with slightly different behaviors. setInt16ChannelData(ChannelIndex as Integer, Data as Memoryblock) as booleanĪs you see in the code we build two settings dictionary as we pass data in in 32-bit floating point numbers, but want to write it as 16bit integer to the file to save a bit of space: (more).setInt32ChannelData(ChannelIndex as Integer, Data as Memoryblock) as boolean.setFloatChannelData(ChannelIndex as Integer, Data as Memoryblock) as boolean.While you could do it yourself with Ptr already, it's convenient to let the plugin handle the stride and double pointer dereferencing for you to copy values and return true on success: ![]() To make it work, we have to add a few new methods to AVAudioPCMBufferMBS class to pass in sample data. So here is a little function, which takes a memory block of samples and writes them to a file on the desktop. If you work with AVAudioPCMBufferMBS objects from either an audio file or with samples from microphone, it may be useful to write them to a file. Today we have a tip for everyone using AVFoundation classes in MBS Xojo Plugins. Write audio file with samples using AVFoundation ![]()
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