protected override void dequeue(FileHandle videoDevice)
{
int idx = buffer.index;
videoDevice.call(eControlCode.DQBUF, ref buffer);
if (buffer.index != idx)
{
throw new ApplicationException($"DecodedBuffer.dequeue: expecting buffer #{ idx }, got #{ buffer.index }");
}
// Logger.logVerbose( "DecodedBuffer.dequeue: {0}", buffer );
// Logger.logVerbose( "DecodedBuffer.dequeue: {0}", buffer.index );
}
public EncodedBuffer(FileHandle videoDevice, int bufferIndex) : base(bufferIndex)
{
// https://www.kernel.org/doc/html/v4.19/media/uapi/v4l/mmap.html#example-mapping-buffers-in-the-single-planar-api
buffer = default;
buffer.type = eBufferType.VideoOutputMPlane;
buffer.memory = eMemory.MemoryMap;
buffer.index = bufferIndex;
buffer.length = 1;
planes = new PlanesArray(1);
buffer.m.planes = planes;
videoDevice.call(eControlCode.QUERYBUF, ref buffer);
// Logger.logVerbose( "eControlCode.QUERYBUF completed.\n\tbuffer: {0}\n\tplane: {1}", buffer, plane );
ref sPlane plane = ref planes.span[0];
public abstract string queryStatus(FileHandle videoDevice);
protected abstract void dequeue(FileHandle videoDevice);
public override string queryStatus(FileHandle videoDevice)
{
videoDevice.call(eControlCode.QUERYBUF, ref buffer);
return(buffer.ToString());
}
protected override void enqueue(FileHandle videoDevice)
{
videoDevice.call(eControlCode.QBUF, ref buffer);
}
