/// <summary>
/// Parse an PCS packet which contains width/height info
/// </summary>
/// <param name="segment">object containing info about the current segment</param>
/// <param name="pic">SubPicture object containing info about the current caption</param>
/// <param name="msg">reference to message string</param>
/// <param name="buffer">Raw data buffer, starting right after segment</param>
private static void ParsePcs(SupSegment segment, BluRaySupPicture pic, string[] msg, byte[] buffer)
{
if (segment.Size >= 4)
{
pic.Width = BigEndianInt16(buffer, 0); // video_width
pic.Height = BigEndianInt16(buffer, 2); // video_height
int type = buffer[4]; // hi nibble: frame_rate, lo nibble: reserved
int num = BigEndianInt16(buffer, 5); // composition_number
// skipped:
// 8bit composition_state: 0x00: normal, 0x40: acquisition point
// 0x80: epoch start, 0xC0: epoch continue, 6bit reserved
// 8bit palette_update_flag (0x80), 7bit reserved
int palId = buffer[9]; // 8bit palette_id_ref
int coNum = buffer[10]; // 8bit number_of_composition_objects (0..2)
if (coNum > 0)
{
// composition_object:
int objId = BigEndianInt16(buffer, 11); // 16bit object_id_ref
msg[0] = "palID: " + palId + ", objID: " + objId;
if (pic.ImageObjects == null)
{
pic.ImageObjects = new List <ImageObject>();
}
ImageObject imgObj;
if (objId >= pic.ImageObjects.Count)
{
imgObj = new ImageObject();
pic.ImageObjects.Add(imgObj);
}
else
{
imgObj = pic.GetImageObject(objId);
}
imgObj.PaletteId = palId;
pic.ObjectId = objId;
// skipped: 8bit window_id_ref
if (segment.Size >= 0x13)
{
pic.FramesPerSecondType = type;
// object_cropped_flag: 0x80, forced_on_flag = 0x040, 6bit reserved
int forcedCropped = buffer[14];
pic.CompositionNumber = num;
pic.IsForced = ((forcedCropped & 0x40) == 0x40);
imgObj.XOffset = BigEndianInt16(buffer, 15); // composition_object_horizontal_position
imgObj.YOffset = BigEndianInt16(buffer, 17); // composition_object_vertical_position
// if (object_cropped_flag==1)
// 16bit object_cropping_horizontal_position
// 16bit object_cropping_vertical_position
// 16bit object_cropping_width
// object_cropping_height
}
}
}
}
/// <summary>
/// parse an ODS packet which contain the image data
/// </summary>
/// <param name="buffer">raw byte date, starting right after segment</param>
/// <param name="segment">object containing info about the current segment</param>
/// <param name="pic">SubPicture object containing info about the current caption</param>
/// <param name="msg">reference to message string</param>
/// <returns>true if this is a valid new object (neither invalid nor a fragment)</returns>
private static bool ParseOds(byte[] buffer, SupSegment segment, BluRaySupPicture pic, string[] msg)
{
ImageObjectFragment info;
int objId = BigEndianInt16(buffer, 0); // 16bit object_id
int objVer = buffer[2]; // 16bit object_id nikse - index 2 or 1???
int objSeq = buffer[3]; // 8bit first_in_sequence (0x80),
// last_in_sequence (0x40), 6bits reserved
bool first = (objSeq & 0x80) == 0x80;
bool last = (objSeq & 0x40) == 0x40;
if (pic.ImageObjects == null)
{
pic.ImageObjects = new List <ImageObject>();
}
ImageObject imgObj;
if (objId >= pic.ImageObjects.Count)
{
imgObj = new ImageObject();
pic.ImageObjects.Add(imgObj);
}
else
{
imgObj = pic.GetImageObject(objId);
}
if (imgObj.Fragments == null || first)
{ // 8bit object_version_number
// skipped:
// 24bit object_data_length - full RLE buffer length (including 4 bytes size info)
int width = BigEndianInt16(buffer, 7); // object_width
int height = BigEndianInt16(buffer, 9); // object_height
if (width <= pic.Width && height <= pic.Height)
{
imgObj.Fragments = new List <ImageObjectFragment>();
info = new ImageObjectFragment();
info.ImagePacketSize = segment.Size - 11; // Image packet size (image bytes)
info.ImageBuffer = new byte[info.ImagePacketSize];
Buffer.BlockCopy(buffer, 11, info.ImageBuffer, 0, info.ImagePacketSize);
imgObj.Fragments.Add(info);
imgObj.BufferSize = info.ImagePacketSize;
imgObj.Height = height;
imgObj.Width = width;
msg[0] = "ID: " + objId + ", update: " + objVer + ", seq: " + (first ? "first" : "") +
((first && last) ? "/" : "") + (last ? "" + "last" : "");
return(true);
}
System.Diagnostics.Debug.Print("Invalid image size - ignored");
return(false);
}
// object_data_fragment
// skipped:
// 16bit object_id
// 8bit object_version_number
// 8bit first_in_sequence (0x80), last_in_sequence (0x40), 6bits reserved
info = new ImageObjectFragment();
info.ImagePacketSize = segment.Size - 4;
info.ImageBuffer = new byte[info.ImagePacketSize];
Buffer.BlockCopy(buffer, 4, info.ImageBuffer, 0, info.ImagePacketSize);
imgObj.Fragments.Add(info);
imgObj.BufferSize += info.ImagePacketSize; // total size (may contain several packets)
msg[0] = "ID: " + objId + ", update: " + objVer + ", seq: " + (first ? "first" : "") + ((first && last) ? "/" : "") + (last ? "" + "last" : "");
return(false);
}