/// <summary>
/// Gathers all data in this payload and returns as a byte array.
/// </summary>
/// <returns>A byte array containing the image frame.</returns>
internal byte[] GetBufferData()
{
if (MMALCameraConfig.Debug)
{
MMALLog.Logger.Debug("Getting data from buffer");
}
MMALCheck(MMALBuffer.mmal_buffer_header_mem_lock(this.Ptr), "Unable to lock buffer header.");
try
{
var ps = this.Ptr->data + this.Offset;
var buffer = new byte[(int)this.Ptr->Length];
Marshal.Copy((IntPtr)ps, buffer, 0, buffer.Length);
MMALBuffer.mmal_buffer_header_mem_unlock(this.Ptr);
return(buffer);
}
catch
{
// If something goes wrong, unlock the header.
MMALBuffer.mmal_buffer_header_mem_unlock(this.Ptr);
MMALLog.Logger.Warn("Unable to handle data. Returning null.");
return(null);
}
}
/// <summary>
/// Gathers all data in this payload and returns as a byte array
/// </summary>
/// <returns></returns>
internal byte[] GetBufferData()
{
MMALCheck(MMALBuffer.mmal_buffer_header_mem_lock(this.Ptr), "Unable to lock buffer header.");
try
{
var ps = this.Ptr->data + this.Offset;
var buffer = Array.CreateInstance(typeof(byte), (int)this.Ptr->Length) as byte[];
Marshal.Copy((IntPtr)ps, buffer, 0, buffer.Length);
MMALBuffer.mmal_buffer_header_mem_unlock(this.Ptr);
return(buffer);
}
catch
{
//If something goes wrong, unlock the header.
MMALBuffer.mmal_buffer_header_mem_unlock(this.Ptr);
MMALLog.Logger.Warn("Unable to handle data. Returning null.");
return(null);
}
}
internal void ReadIntoBuffer(byte[] source, bool eof)
{
MMALCheck(MMALBuffer.mmal_buffer_header_mem_lock(this.Ptr), "Unable to lock buffer header.");
var ptrAlloc = Marshal.AllocHGlobal(source.Length);
this.Ptr->data = (byte *)ptrAlloc;
this.Ptr->allocSize = (uint)source.Length;
this.Ptr->length = (uint)source.Length;
if (eof)
{
this.Ptr->flags = (uint)MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_EOS;
}
try
{
fixed(byte *pSource = source)
{
var ps = pSource;
byte *pt = (byte *)ptrAlloc;
for (int i = 0; i < source.Length; i++)
{
*pt = *ps;
pt++;
ps++;
}
}
MMALBuffer.mmal_buffer_header_mem_unlock(this.Ptr);
}
catch
{
//If something goes wrong, unlock the header.
MMALBuffer.mmal_buffer_header_mem_unlock(this.Ptr);
Marshal.FreeHGlobal(ptrAlloc);
MMALLog.Logger.Warn("Unable to write data to buffer.");
}
}
