/// <summary>
/// AnnexB formatted h264 bitstream
/// </summary>
/// <param name="streamInfo"></param>
/// <returns></returns>
public static AMMediaType H264_AnnexB(InputstreamInfo streamInfo)
{
int width = (int)streamInfo.Width;
int height = (int)streamInfo.Height;
if (streamInfo.ExtraData.Length > 0)
{
var codecData = new H264CodecData(streamInfo.ExtraData);
SPSUnit spsUnit = new SPSUnit(codecData.SPS);
width = spsUnit.Width();
height = spsUnit.Height();
}
VideoInfoHeader2 vi = new VideoInfoHeader2();
vi.SrcRect.right = width;
vi.SrcRect.bottom = height;
vi.TargetRect.right = width;
vi.TargetRect.bottom = height;
int hcf = HCF(width, height);
vi.PictAspectRatioX = width / hcf;
vi.PictAspectRatioY = height / hcf;
vi.BmiHeader.Width = width;
vi.BmiHeader.Height = height;
vi.BmiHeader.Planes = 1;
vi.BmiHeader.Compression = FOURCC_H264;
AMMediaType amt = new AMMediaType();
amt.majorType = MediaType.Video;
amt.subType = MediaSubType.H264;
amt.temporalCompression = true;
amt.fixedSizeSamples = false;
amt.sampleSize = 1;
amt.SetFormat(vi);
return amt;
}
public void SetFormat(VideoInfoHeader2 vih)
{
if (vih != null)
{
int cb = Marshal.SizeOf(vih);
IntPtr _ptr = Marshal.AllocCoTaskMem(cb);
try
{
Marshal.StructureToPtr(vih, _ptr, true);
SetFormat(_ptr, cb);
formatType = FormatType.VideoInfo2;
}
finally
{
Marshal.FreeCoTaskMem(_ptr);
}
}
}
public Mpeg2VideoInfo()
{
hdr = new VideoInfoHeader2();
dwSequenceHeader = null;
dwStartTimeCode = 0;
cbSequenceHeader = 0;
dwProfile = 0;
dwLevel = 0;
dwFlags = 0;
}
