+/*
+ * Decoder for DVD bitmap subtitles, also known as "VOB subtitles" within the HandBrake source code.
+ *
+ * Input format of the subtitle packets is described here:
+ * http://sam.zoy.org/writings/dvd/subtitles/
+ *
+ * An auxiliary input is the color palette lookup table, in 'subtitle->palette'.
+ * The demuxer implementation must fill out this table appropriately.
+ * - In the case of a true DVD input, the palette is read from the IFO file.
+ * - In the case of an MKV file input, the palette is read from the codec private data of the subtitle track.
+ *
+ * Output format of this decoder is PICTURESUB, which is:
+ * struct PictureSubPacket {
+ * uint8_t lum[pixelCount];
+ * uint8_t alpha[pixelCount];
+ * uint8_t chromaU[pixelCount];
+ * uint8_t chromaV[pixelCount];
+ * }
+ */
+