public static PictureDisplayExtension read(BitReader bits, SequenceExtension se, PictureCodingExtension pce) { PictureDisplayExtension pde = new PictureDisplayExtension(); pde.frame_centre_offsets = new Point[numberOfFrameCentreOffsets(se, pce)]; for (int i = 0; i < pde.frame_centre_offsets.Length; i++) { int frame_centre_horizontal_offset = bits.readNBit(16); bits.read1Bit(); int frame_centre_vertical_offset = bits.readNBit(16); bits.read1Bit(); pde.frame_centre_offsets[i] = new Point(frame_centre_horizontal_offset, frame_centre_vertical_offset); } return(pde); }
public static void readExtension(MemoryStream bb, PictureHeader ph, SequenceHeader sh) { ph.m_hasExtensions = true; BitReader inb = new BitReader(bb); int extType = inb.readNBit(4); switch (extType) { case Quant_Matrix_Extension: ph.quantMatrixExtension = QuantMatrixExtension.read(inb); break; case Copyright_Extension: ph.copyrightExtension = CopyrightExtension.read(inb); break; case Picture_Display_Extension: ph.pictureDisplayExtension = PictureDisplayExtension.read(inb, sh.sequenceExtension, ph.pictureCodingExtension); break; case Picture_Coding_Extension: ph.pictureCodingExtension = PictureCodingExtension.read(inb); break; case Picture_Spatial_Scalable_Extension: ph.pictureSpatialScalableExtension = PictureSpatialScalableExtension.read(inb); break; case Picture_Temporal_Scalable_Extension: ph.pictureTemporalScalableExtension = PictureTemporalScalableExtension.read(inb); break; default: throw new Exception("Unsupported extension: " + extType); } }