August 3rd 2010
When twenty or so langage creators are put together to make a book, it can only be interesting. It’s a good revealer of character, as they tend to open their heart. In fact I think that’s exactly what happened in this book.
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Loading ...July 6th 2010
After my last post on QtAgain, I’ve decided to test a few simple digital filters. I’ve tried to make them as generic as possible, and with a VST interface.
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(No Ratings Yet) Loading ...March 16th 2010
This book may be a little bit old (2001), but it’s still very relevant today. A lot of the material in the book is still not applied in C++ development, it may be time to apply it, doesn’t it?
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(No Ratings Yet) Loading ...March 2nd 2010
Some months ago, I’ve modified the AGain plugin sample from the VST SDK to add a Qt window. At that time, I encountered an issue with Vsthost, which is a common VST host. The issue was that in windowed mode, the plugin’s UI wasn’t displayed. With Traktion, I didn’t have this problem, but the minihost (a sample from the SDK) also didn’t use the UI size.
When developing pyvst, I has to implement the retrieval of the size of the plugin, and I’ve decided to add this to QtAGain. I was surprised to see that it actually work with just giving back the UI size (so fixing this was less than 5 lines).
So now, I know that to impelment an UI for a VST plugin, I have to implement:
Don’t make the same mistake as I did, do implement all three of them, even if your favorite VST host can live without getRect().
P.S.: Mixing Qt for VST UIs and wxPython for pyvst works really fine!
(No Ratings Yet) Loading ...February 9th 2010
In a previous post, I’ve tried to use Qt for the editor window of a VST plugin. The thing is, I want to do more than just play with a GUI, I also want to see what is done to an audio stream by a plugin.
To do so, I’ve decided to expose the VST interface to Python. There are some implementation I’ve heard of, but they are based on Cython or other wrapping tools. Ctypes has the advantage of not needing a compilation step. There are also every functionality needed, as callback creation (plugins use a callback to ask the host some stuffs), and Python provides the additional mathematical tools to display what the plugin does. It may not be perfect, but it will be enough for a starter.
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(2 votes, average: 5.00 out of 5) Loading ...January 5th 2010
Due to the end of the free lunch, manufacturers started to provide differents processing units and developers started to go parallel. It’s kind of back to the future, as accelerators existed before today (the x87 FPU started as a coprocessor, for instance). If those accelerators were integrated into the CPU, their instruction set were also.
Today’s accelerators are not there yet. The tools are not ready yet (code translators) and usual programming practices may not be adequate. All the ecosystem will evolve, accelerators will change (GPUs are the main trend, but they will be different in a few years), so what you will do today needs to be shaped with these changes in mind. How is it possible to do so? Is it even possible?
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(No Ratings Yet) Loading ...December 8th 2009
Free lunch is over, it’s time to go concurrent. The Art of Concurrency addresses the need for a workflow to develop concurrent/parallel applications.
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(No Ratings Yet) Loading ...December 1st 2009
Years ago, I’ve tried to use the GPL version of Qt, but it couldn’t be done without a Qt Solution that was at the time non-free. Now, Nokia has freed and Qt and the appropriate Qt Solution.
I’ve searched if someone has already used this new version to create a VST plugin. The only blog post I’ve found does not use the Qt Solution and is not perfect. According to the documentation what is missing in this solution is precisely what the Solution should do. So let’s try it.
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(1 votes, average: 5.00 out of 5) Loading ...September 29th 2009
Now, I will show the implementation of reflection (from the Whitted approach). It is basically using the reflection law and recurse the ray cast.
Each object can reflect a ray more or less from a different object. A mirror would reflect the light totally, and a matte object would reflect nothing. Each new reflection is a new ray tracing call, so it can be costly. The number of recursion levels will be fixed, even if an object reflects nothing: this will be implemented through shaders in the future.
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(No Ratings Yet) Loading ...September 22nd 2009
After reviewing Parallel Studio, I’ve decided to look after Advisor Lite. Intel offers it for free, before the actual Advisor is released with a future Parallel Studio version. It aims at steering multithreaded development with Parallel Studio.
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