internal bool queryBufferCaps(eBufferType bufferType, eMemory type)
{
// If you want to query the capabilities with a minimum of side-effects, then this can be called with count set to 0, memory set to V4L2_MEMORY_MMAP and type set to the buffer type.
// This will free any previously allocated buffers, so this is typically something that will be done at the start of the application.
sRequestBuffers requestBuffers = new sRequestBuffers();
requestBuffers.memory = type;
requestBuffers.type = eBufferType.VideoOutputMPlane;
return(file.tryCall(eControlCode.REQBUFS, ref requestBuffers));
}
public int allocateDecodedFrames(int frames)
{
sRequestBuffers rbDecoded = new sRequestBuffers()
{
count = frames,
type = eBufferType.VideoCaptureMPlane,
memory = eMemory.MemoryMap
};
file.call(eControlCode.REQBUFS, ref rbDecoded);
return(rbDecoded.count);
}
public int allocateEncodedBuffers(int encodedBuffers)
{
sRequestBuffers rbEncoded = new sRequestBuffers()
{
count = encodedBuffers,
type = eBufferType.VideoOutputMPlane,
memory = eMemory.MemoryMap
};
file.call(eControlCode.REQBUFS, ref rbEncoded);
// Logger.logVerbose( "Requesting {0} encoded buffers, the driver said {1}", encodedBuffers, rbEncoded.count );
return(rbEncoded.count);
}
/// <summary>Set buffer count = 0, for both queues</summary>
public void freeAllBuffers()
{
sRequestBuffers rbEncoded = new sRequestBuffers()
{
type = eBufferType.VideoOutputMPlane,
memory = eMemory.MemoryMap
};
file.tryCall(eControlCode.REQBUFS, ref rbEncoded);
sRequestBuffers rbDecoded = new sRequestBuffers()
{
type = eBufferType.VideoCaptureMPlane,
memory = eMemory.MemoryMap
};
file.tryCall(eControlCode.REQBUFS, ref rbDecoded);
}
