private int GetBitrate(MMal.MMAL_VIDEO_LEVEL_T level, int bitrate, string[] options)
{
var paramBitrate = GetConfig.GetInt32("bitrate", 17000000, options);
var allowedBitRate = _h264bitRates.FirstOrDefault(c => c.Item1 == level);
if (allowedBitRate != null)
{
return(allowedBitRate.Item2 < paramBitrate ? allowedBitRate.Item2 : paramBitrate);
}
return(paramBitrate);
}
/// <summary>
/// Default settings used:
/// bitrate=17000000, intra_period=None, profile='high',
/// level='4', quantization=0, quality=0, inline_headers=True,
/// sei=False, sps_timing=False, motion_output=None,
/// intra_refresh=None
// Max bitrate we allow for recording
/// </summary>
public unsafe override void CreateEncoder(ImageFormat format, int resize, params string[] options)
{
if (_logger.IsDebugEnabled)
{
_logger.Debug("CreateEncoder {0}", format);
}
int bitrate = 17000000;
bool inlineHeaders = true;
bool sei = false;
bool sps_timing = false;
int quality = 23;
uint mmalFormat;
if (format == ImageFormat.h264)
{
mmalFormat = MMal.MMAL_ENCODING_H264;
}
else if (format == ImageFormat.mpeg)
{
mmalFormat = MMal.MMAL_ENCODING_MJPEG;
}
else
{
throw new Exception(String.Format("Invalid video format {0}", format));
}
_outputPort.Format = (uint)mmalFormat;
if (format == ImageFormat.h264)
{
//MMal.MMAL_VIDEO_PROFILE_T _profile = MMal.MMAL_VIDEO_PROFILE_T.MMAL_VIDEO_PROFILE_H264_HIGH;
//MMal.MMAL_VIDEO_LEVEL_T _level = MMal.MMAL_VIDEO_LEVEL_T.MMAL_VIDEO_LEVEL_H264_4;
MMal.MMAL_VIDEO_PROFILE_T profile = GetProfile(options);
MMal.MMAL_VIDEO_LEVEL_T level = GetLevel(options);
MMal.MMAL_PARAMETER_VIDEO_PROFILE_T param = new MMal.MMAL_PARAMETER_VIDEO_PROFILE_T();
param.hdr.id = (uint)MMal.MMAL_PARAMETER_IDS.MMAL_PARAMETER_PROFILE;
param.hdr.size = (uint)Marshal.SizeOf(param);
param.profile = new MMal.VIDEO_PROFILE();
param.profile.profile = profile;
param.profile.level = level;
MMal.MMAL_STATUS_T status = MMal.mmal_port_parameter_set(_outputPort.Pointer, ¶m.hdr);
if (status != MMal.MMAL_STATUS_T.MMAL_SUCCESS)
{
throw new Exception(String.Format("Cannot set parameter on port {0} {1}", _outputPort.Name, status));
}
bitrate = GetBitrate(level, bitrate, options);
// We need to set the frame rate on output to 0, to ensure it gets
// updated correctly from the input framerate when port connected
_outputPort.Framerate = (0, 1);
_outputPort.BitRate = (uint)bitrate;
_outputPort.Commit();
if (_logger.IsDebugEnabled)
{
_logger.Debug("Port Commited");
}
if (inlineHeaders)
{
_outputPort.SetParam(MMal.MMAL_PARAMETER_IDS.MMAL_PARAMETER_VIDEO_ENCODE_INLINE_HEADER, true);
}
if (sei)
{
_outputPort.SetParam(MMal.MMAL_PARAMETER_IDS.MMAL_PARAMETER_VIDEO_ENCODE_SEI_ENABLE, true);
}
if (sps_timing)
{
_outputPort.SetParam(MMal.MMAL_PARAMETER_IDS.MMAL_PARAMETER_VIDEO_ENCODE_SPS_TIMING, true);
}
// other H264 parameters must be set here
}
else
{
_outputPort.BitRate = 1;
_outputPort.Commit();
}
if (quality != 0)
{
_outputPort.SetParam(MMal.MMAL_PARAMETER_IDS.MMAL_PARAMETER_VIDEO_ENCODE_INITIAL_QUANT, quality);
_outputPort.SetParam(MMal.MMAL_PARAMETER_IDS.MMAL_PARAMETER_VIDEO_ENCODE_MIN_QUANT, quality);
_outputPort.SetParam(MMal.MMAL_PARAMETER_IDS.MMAL_PARAMETER_VIDEO_ENCODE_MAX_QUANT, quality);
}
Encoder.Inputs[0].SetParam(MMal.MMAL_PARAMETER_IDS.MMAL_PARAMETER_VIDEO_IMMUTABLE_INPUT, true);
Encoder.Enable();
if (_logger.IsDebugEnabled)
{
_logger.Debug("PiVideoEncoder.CreateEncoder done Output port {0}", _outputPort.ToString());
}
base.CreateEncoder(format, resize, options);
}