/// <summary>
/// Get default number of ref-frames for given parameters
/// </summary>
/// <param name="oPreset">encoding preset</param>
/// <param name="oTuningMode">tuning mode</param>
/// <param name="oDevice">target device</param>
/// <param name="iLevel">AVC-Level</param>
/// <param name="hRes">horizontal resolution</param>
/// <param name="vRes">vertical resolution</param>
/// <returns>number of ref frames</returns>
public static int GetDefaultNumberOfRefFrames(int oPreset, int oTuningMode, X264Device oDevice, int iLevel, int hRes, int vRes)
{
var iDefaultSetting = 1;
switch (oPreset)
{
case 0:
case 1:
case 2: iDefaultSetting = 1; break;
case 3:
case 4: iDefaultSetting = 2; break;
case 5: iDefaultSetting = 3; break;
case 6: iDefaultSetting = 5; break;
case 7: iDefaultSetting = 8; break;
case 8:
case 9: iDefaultSetting = 16; break;
}
if (oTuningMode == 1 && iDefaultSetting > 1) // animation
{
iDefaultSetting *= 2;
}
if (iDefaultSetting > 16)
{
iDefaultSetting = 16;
}
if (oDevice != null && oDevice.ReferenceFrames > -1)
{
iDefaultSetting = Math.Min(oDevice.ReferenceFrames, iDefaultSetting);
}
if (iLevel <= -1 || hRes <= 0 || vRes <= 0)
{
return(iDefaultSetting);
}
var iMaxRefForLevel = GetMaxRefForLevel(iLevel, hRes, vRes);
if (iMaxRefForLevel > -1 && iMaxRefForLevel < iDefaultSetting)
{
iDefaultSetting = iMaxRefForLevel;
}
return(iDefaultSetting);
}
/// <summary>
/// Get default number of ref-frames for given parameters
/// </summary>
/// <param name="oPreset">encoding preset</param>
/// <param name="oTuningMode">tuning mode</param>
/// <param name="oDevice">target device</param>
/// <returns>number of ref frames</returns>
public static int GetDefaultNumberOfRefFrames(int oPreset, int oTuningMode, X264Device oDevice)
{
return(GetDefaultNumberOfRefFrames(oPreset, oTuningMode, oDevice, -1, -1, -1));
}
/// <summary>
/// Get default number of B-frames for given parameters
/// </summary>
/// <param name="oPresetLevel">encoding preset</param>
/// <param name="oTuningMode">tuning mode</param>
/// <param name="oAvcProfile">AVC-Profile</param>
/// <param name="oDevice">Target device</param>
/// <returns>number of b-frames</returns>
public static int GetDefaultNumberOfBFrames(int oPresetLevel, int oTuningMode, int oAvcProfile, X264Device oDevice)
{
var iDefaultSetting = 0;
if (oAvcProfile == 0) // baseline
{
return(iDefaultSetting);
}
switch (oPresetLevel)
{
case 0: iDefaultSetting = 0; break;
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7: iDefaultSetting = 3; break;
case 8: iDefaultSetting = 8; break;
case 9: iDefaultSetting = 16; break;
}
if (oTuningMode == 1) // animation
{
iDefaultSetting += 2;
}
if (iDefaultSetting > 16)
{
iDefaultSetting = 16;
}
if (oDevice != null && oDevice.BFrames > -1)
{
return(Math.Min(oDevice.BFrames, iDefaultSetting));
}
return(iDefaultSetting);
}