/// <summary>
/// Get a MMAL_BUFFER_HEADER_T from a queue.
/// </summary>
/// <param name="ptr">The queue to get a buffer from.</param>
/// <returns>A new managed buffer header object.</returns>
internal static MMALBufferImpl GetBuffer(MMAL_QUEUE_T *ptr)
{
var bufPtr = MMALQueue.mmal_queue_get(ptr);
if (bufPtr == null || (IntPtr)bufPtr == IntPtr.Zero)
{
return(null);
}
return(new MMALBufferImpl(bufPtr));
}
/// <summary>
/// Get a MMAL_BUFFER_HEADER_T from a queue.
/// </summary>
/// <returns>A new managed buffer header object.</returns>
internal MMALBufferImpl GetBuffer()
{
var ptr = MMALQueue.mmal_queue_get(this.Ptr);
if (ptr == null || (IntPtr)ptr == IntPtr.Zero)
{
return(null);
}
return(new MMALBufferImpl(ptr));
}
/// <summary>
/// Get a MMAL_BUFFER_HEADER_T from a queue.
/// </summary>
/// <returns>A new managed buffer header object.</returns>
internal MMALBufferImpl GetBuffer()
{
var ptr = MMALQueue.mmal_queue_get(this.Ptr);
if (!this.CheckState())
{
MMALLog.Logger.Warn("Buffer retrieved null.");
return(null);
}
return(new MMALBufferImpl(ptr));
}
internal MMALBufferImpl Wait()
{
return(new MMALBufferImpl(MMALQueue.mmal_queue_wait(this.Ptr)));
}
/// <summary>
/// Get the number of MMAL_BUFFER_HEADER_T currently in a queue.
/// </summary>
/// <returns>The number of buffers currently in this queue.</returns>
internal uint QueueLength()
{
var length = MMALQueue.mmal_queue_length(this.Ptr);
return(length);
}
internal static MMALQueueImpl Create()
{
var ptr = MMALQueue.mmal_queue_create();
return(new MMALQueueImpl(ptr));
}
/// <summary>
/// Destroy a queue of MMAL_BUFFER_HEADER_T.
/// </summary>
internal void Destroy()
{
MMALQueue.mmal_queue_destroy(this.Ptr);
}
internal void Put(MMALBufferImpl buffer)
{
MMALQueue.mmal_queue_put(this.Ptr, buffer.Ptr);
}
/// <summary>
/// Waits (blocking) for a buffer header to be available in the queue and allocates it. This is the same as a wait, except that it will abort in case of timeout.
/// </summary>
/// <param name="waitms">Number of milliseconds to wait before aborting.</param>
/// <returns>The buffer header.</returns>
public IBuffer TimedWait(int waitms)
{
return(new MMALBufferImpl(MMALQueue.mmal_queue_timedwait(this.Ptr, waitms)));
}
/// <summary>
/// Waits (blocking) for a buffer header to be available in the queue and allocates it.
/// </summary>
/// <returns>The buffer header.</returns>
public IBuffer Wait()
{
return(new MMALBufferImpl(MMALQueue.mmal_queue_wait(this.Ptr)));
}
/// <summary>
/// Destroy a queue of MMAL_BUFFER_HEADER_T.
/// </summary>
private void Destroy()
{
MMALQueue.mmal_queue_destroy(this.Ptr);
}
/// <summary>
/// Puts the buffer header back into this queue.
/// </summary>
/// <param name="buffer">The buffer header.</param>
public void Put(IBuffer buffer)
{
MMALQueue.mmal_queue_put(this.Ptr, buffer.Ptr);
}
/// <summary>
/// Get a MMAL_BUFFER_HEADER_T from a queue
/// </summary>
/// <returns></returns>
internal MMALBufferImpl GetBuffer()
{
var ptr = MMALQueue.mmal_queue_get(this.Ptr);
return(new MMALBufferImpl(ptr));
}
