/// <summary>
/// Create the binary stream representation of one caption
/// </summary>
/// <param name="pic">SubPicture object containing caption info</param>
/// <param name="bm">bitmap</param>
/// <param name="pal">palette</param>
/// <returns>byte buffer containing the binary stream representation of one caption</returns>
public static byte[] CreateSupFrame(BluRaySupPicture pic, Bitmap bm)
{
int size = 0;
var colorPalette = GetBitmapPalette(bm);
BluRaySupPalette pal = new BluRaySupPalette(colorPalette.Count);
int k = 0;
foreach (var kvp in colorPalette)
{
pal.SetColor(k, kvp.Key);
k++;
}
byte[] rleBuf = EncodeImage(bm, colorPalette);
// for some obscure reason, a packet can be a maximum 0xfffc bytes
// since 13 bytes are needed for the header("PG", PTS, DTS, ID, SIZE)
// there are only 0xffef bytes available for the packet
// since the first ODS packet needs an additional 11 bytes for info
// and the following ODS packets need 4 additional bytes, the
// first package can store only 0xffe4 RLE buffer bytes and the
// following packets can store 0xffeb RLE buffer bytes
int numAddPackets;
if (rleBuf.Length <= 0xffe4)
{
numAddPackets = 0; // no additional packets needed;
}
else
{
numAddPackets = 1 + (rleBuf.Length - 0xffe4) / 0xffeb;
}
// a typical frame consists of 8 packets. It can be enlonged by additional
// object frames
int palSize = colorPalette.Count;
size = packetHeader.Length * (8 + numAddPackets);
size += headerPCSStart.Length + headerPCSEnd.Length;
size += 2 * headerWDS.Length + headerODSFirst.Length;
size += numAddPackets * headerODSNext.Length;
size += (2 + palSize * 5) /* PDS */;
size += rleBuf.Length;
pic.WindowXOffset = (pic.Width - bm.Width) / 2;
pic.WindowYOffset = pic.Height - (bm.Height + (pic.Height / 12));
int yOfs = pic.WindowYOffset - Core.CropOfsY;
if (yOfs < 0)
{
yOfs = 0;
}
else
{
int yMax = pic.Height - pic.WindowHeight - 2 * Core.CropOfsY;
if (yOfs > yMax)
{
yOfs = yMax;
}
}
int h = pic.Height - 2 * Core.CropOfsY;
byte[] buf = new byte[size];
int index = 0;
int fpsId = getFpsId(Core.fpsTrg);
/* time (in 90kHz resolution) needed to initialize (clear) the screen buffer
* based on the composition pixel rate of 256e6 bit/s - always rounded up */
int frameInitTime = (pic.Width * pic.Height * 9 + 3199) / 3200; // better use default height here
/* time (in 90kHz resolution) needed to initialize (clear) the window area
* based on the composition pixel rate of 256e6 bit/s - always rounded up
* Note: no cropping etc. -> window size == image size */
int windowInitTime = (bm.Width * bm.Height * 9 + 3199) / 3200;
/* time (in 90kHz resolution) needed to decode the image
* based on the decoding pixel rate of 128e6 bit/s - always rounded up */
int imageDecodeTime = (bm.Width * bm.Height * 9 + 1599) / 1600;
// write PCS start
packetHeader[10] = 0x16; // ID
int dts = (int)pic.StartTime - (frameInitTime + windowInitTime);
ToolBox.SetDWord(packetHeader, 2, (int)pic.StartTime); // PTS
ToolBox.SetDWord(packetHeader, 6, dts); // DTS
ToolBox.SetWord(packetHeader, 11, headerPCSStart.Length); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
ToolBox.SetWord(headerPCSStart, 0, pic.Width);
ToolBox.SetWord(headerPCSStart, 2, h); // cropped height
ToolBox.SetByte(headerPCSStart, 4, fpsId);
ToolBox.SetWord(headerPCSStart, 5, pic.CompositionNumber);
headerPCSStart[14] = (byte)(pic.IsForced ? 0x40 : 0);
ToolBox.SetWord(headerPCSStart, 15, pic.WindowXOffset);
ToolBox.SetWord(headerPCSStart, 17, yOfs);
for (int i = 0; i < headerPCSStart.Length; i++)
{
buf[index++] = headerPCSStart[i];
}
// write WDS
packetHeader[10] = 0x17; // ID
int timeStamp = (int)pic.StartTime - windowInitTime;
ToolBox.SetDWord(packetHeader, 2, timeStamp); // PTS (keep DTS)
ToolBox.SetWord(packetHeader, 11, headerWDS.Length); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
ToolBox.SetWord(headerWDS, 2, pic.WindowXOffset);
ToolBox.SetWord(headerWDS, 4, yOfs);
ToolBox.SetWord(headerWDS, 6, bm.Width);
ToolBox.SetWord(headerWDS, 8, bm.Height);
for (int i = 0; i < headerWDS.Length; i++)
{
buf[index++] = headerWDS[i];
}
// write PDS
packetHeader[10] = 0x14; // ID
ToolBox.SetDWord(packetHeader, 2, dts); // PTS (=DTS of PCS/WDS)
ToolBox.SetDWord(packetHeader, 6, 0); // DTS (0)
ToolBox.SetWord(packetHeader, 11, (2 + palSize * 5)); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
buf[index++] = 0;
buf[index++] = 0;
for (int i = 0; i < palSize; i++)
{
buf[index++] = (byte)i; // index
buf[index++] = pal.GetY()[i]; // Y
buf[index++] = pal.GetCr()[i]; // Cr
buf[index++] = pal.GetCb()[i]; // Cb
buf[index++] = pal.GetAlpha()[i]; // Alpha
}
// write first OBJ
int bufSize = rleBuf.Length;
int rleIndex = 0;
if (bufSize > 0xffe4)
{
bufSize = 0xffe4;
}
packetHeader[10] = 0x15; // ID
timeStamp = dts + imageDecodeTime;
ToolBox.SetDWord(packetHeader, 2, timeStamp); // PTS
ToolBox.SetDWord(packetHeader, 6, dts); // DTS
ToolBox.SetWord(packetHeader, 11, headerODSFirst.Length + bufSize); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
int marker = (int)((numAddPackets == 0) ? 0xC0000000 : 0x80000000);
ToolBox.SetDWord(headerODSFirst, 3, marker | (rleBuf.Length + 4));
ToolBox.SetWord(headerODSFirst, 7, bm.Width);
ToolBox.SetWord(headerODSFirst, 9, bm.Height);
for (int i = 0; i < headerODSFirst.Length; i++)
{
buf[index++] = headerODSFirst[i];
}
for (int i = 0; i < bufSize; i++)
{
buf[index++] = rleBuf[rleIndex++];
}
// write additional OBJ packets
bufSize = rleBuf.Length - bufSize; // remaining bytes to write
for (int p = 0; p < numAddPackets; p++)
{
int psize = bufSize;
if (psize > 0xffeb)
{
psize = 0xffeb;
}
packetHeader[10] = 0x15; // ID (keep DTS & PTS)
ToolBox.SetWord(packetHeader, 11, headerODSNext.Length + psize); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
for (int i = 0; i < headerODSNext.Length; i++)
{
buf[index++] = headerODSNext[i];
}
for (int i = 0; i < psize; i++)
{
buf[index++] = rleBuf[rleIndex++];
}
bufSize -= psize;
}
// write END
packetHeader[10] = (byte)0x80; // ID
ToolBox.SetDWord(packetHeader, 6, 0); // DTS (0) (keep PTS of ODS)
ToolBox.SetWord(packetHeader, 11, 0); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
// write PCS end
packetHeader[10] = 0x16; // ID
ToolBox.SetDWord(packetHeader, 2, (int)pic.EndTime); // PTS
dts = (int)pic.StartTime - 1;
ToolBox.SetDWord(packetHeader, 6, dts); // DTS
ToolBox.SetWord(packetHeader, 11, headerPCSEnd.Length); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
ToolBox.SetWord(headerPCSEnd, 0, pic.Width);
ToolBox.SetWord(headerPCSEnd, 2, h); // cropped height
ToolBox.SetByte(headerPCSEnd, 4, fpsId);
ToolBox.SetWord(headerPCSEnd, 5, pic.CompositionNumber + 1);
for (int i = 0; i < headerPCSEnd.Length; i++)
{
buf[index++] = headerPCSEnd[i];
}
// write WDS
packetHeader[10] = 0x17; // ID
timeStamp = (int)pic.EndTime - windowInitTime;
ToolBox.SetDWord(packetHeader, 2, timeStamp); // PTS (keep DTS of PCS)
ToolBox.SetWord(packetHeader, 11, headerWDS.Length); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
ToolBox.SetWord(headerWDS, 2, pic.WindowXOffset);
ToolBox.SetWord(headerWDS, 4, yOfs);
ToolBox.SetWord(headerWDS, 6, bm.Width);
ToolBox.SetWord(headerWDS, 8, bm.Height);
for (int i = 0; i < headerWDS.Length; i++)
{
buf[index++] = headerWDS[i];
}
// write END
packetHeader[10] = (byte)0x80; // ID
ToolBox.SetDWord(packetHeader, 2, dts); // PTS (DTS of end PCS)
ToolBox.SetDWord(packetHeader, 6, 0); // DTS (0)
ToolBox.SetWord(packetHeader, 11, 0); // size
for (int i = 0; i < packetHeader.Length; i++)
{
buf[index++] = packetHeader[i];
}
return(buf);
}
/// <summary>
/// decode palette from the input stream
/// </summary>
/// <param name="pic">SubPicture object containing info about the current caption</param>
/// <returns>Palette object</returns>
public BluRaySupPalette DecodePalette(BluRaySupPalette defaultPalette)
{
BluRaySupPicture pic = this;
bool fadeOut = false;
if (pic.Palettes.Count == 0 || pic.ObjectIdImage.PaletteId >= pic.Palettes.Count)
{
System.Diagnostics.Debug.Print("Palette not found in objectID=" + pic.ObjectId + " PaletteId=" + pic.ObjectIdImage.PaletteId + "!");
if (defaultPalette == null)
{
return(new BluRaySupPalette(256, Core.UsesBt601()));
}
else
{
return(new BluRaySupPalette(defaultPalette));
}
}
List <PaletteInfo> pl = pic.Palettes[pic.ObjectIdImage.PaletteId];
BluRaySupPalette palette = new BluRaySupPalette(256, Core.UsesBt601());
// by definition, index 0xff is always completely transparent
// also all entries must be fully transparent after initialization
for (int j = 0; j < pl.Count; j++)
{
PaletteInfo p = pl[j];
int index = 0;
for (int i = 0; i < p.PaletteSize; i++)
{
// each palette entry consists of 5 bytes
int palIndex = p.PaletteBuffer[index];
int y = p.PaletteBuffer[++index];
int cr, cb;
if (Core.GetSwapCrCb())
{
cb = p.PaletteBuffer[++index];
cr = p.PaletteBuffer[++index];
}
else
{
cr = p.PaletteBuffer[++index];
cb = p.PaletteBuffer[++index];
}
int alpha = p.PaletteBuffer[++index];
int alphaOld = palette.GetAlpha(palIndex);
// avoid fading out
if (alpha >= alphaOld || alpha == 0)
{
if (alpha < Core.GetAlphaCrop())
{// to not mess with scaling algorithms, make transparent color black
y = 16;
cr = 128;
cb = 128;
}
palette.SetAlpha(palIndex, alpha);
}
else
{
fadeOut = true;
}
palette.SetYCbCr(palIndex, y, cb, cr);
index++;
}
}
if (fadeOut)
{
System.Diagnostics.Debug.Print("fade out detected -> patched palette\n");
}
return(palette);
}