internal void ConfigureVideoProfile(int outputPort)
{
var macroblocks = (MMALCameraConfig.VideoResolution.Width >> 4) * (MMALCameraConfig.VideoResolution.Height >> 4);
var macroblocksPSec = macroblocks * this.Framerate;
List <VideoLevel> videoLevels = H264VideoLevel.GetNormalLevelLimits();
var level = videoLevels.Where(c => c.Level == MMALCameraConfig.VideoLevel).First();
if (macroblocks > level.MacroblocksLimit)
{
throw new PiCameraError("Resolution exceeds macroblock limit for selected profile and level.");
}
if (macroblocksPSec > level.MacroblocksPerSecLimit)
{
throw new PiCameraError("Resolution exceeds macroblocks/s limit for selected profile and level.");
}
MMAL_PARAMETER_VIDEO_PROFILE_S p = new MMAL_PARAMETER_VIDEO_PROFILE_S(MMALCameraConfig.VideoProfile, MMALCameraConfig.VideoLevel);
MMAL_PARAMETER_VIDEO_PROFILE_S[] arr = new MMAL_PARAMETER_VIDEO_PROFILE_S[1] {
p
};
MMAL_PARAMETER_VIDEO_PROFILE_T param = new MMAL_PARAMETER_VIDEO_PROFILE_T(new MMAL_PARAMETER_HEADER_T(MMALParametersVideo.MMAL_PARAMETER_PROFILE, Marshal.SizeOf <MMAL_PARAMETER_VIDEO_PROFILE_T>()), arr);
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(param));
Marshal.StructureToPtr(param, ptr, false);
MMALCheck(MMALPort.mmal_port_parameter_set(this.Outputs[outputPort].Ptr, (MMAL_PARAMETER_HEADER_T *)ptr), "Unable to set video profile.");
Marshal.FreeHGlobal(ptr);
}
internal void ConfigureBitrate(int outputPort)
{
if (this.Outputs[outputPort].EncodingType == MMALEncoding.H264)
{
List <VideoLevel> levelList = null;
if (MMALCameraConfig.VideoProfile == MMALParametersVideo.MMAL_VIDEO_PROFILE_T.MMAL_VIDEO_PROFILE_H264_HIGH)
{
levelList = H264VideoLevel.GetHighLevelLimits();
}
else if (MMALCameraConfig.VideoProfile == MMALParametersVideo.MMAL_VIDEO_PROFILE_T.MMAL_VIDEO_PROFILE_H264_HIGH10)
{
levelList = H264VideoLevel.GetHigh10LevelLimits();
}
else
{
levelList = H264VideoLevel.GetNormalLevelLimits();
}
var level = levelList.Where(c => c.Level == MMALCameraConfig.VideoLevel).First();
if (this.Bitrate > level.Maxbitrate)
{
throw new PiCameraError("Bitrate requested exceeds maximum for selected Video Level and Profile");
}
}
else if (this.Outputs[outputPort].EncodingType == MMALEncoding.MJPEG)
{
if (this.Bitrate > MaxBitrateMJPEG)
{
MMALLog.Logger.Warn("Bitrate too high: Reducing to 25MBit/s");
this.Bitrate = MaxBitrateMJPEG;
}
}
}
