diff options
Diffstat (limited to 'libhb/decvobsub.c')
| -rw-r--r-- | libhb/decvobsub.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/libhb/decvobsub.c b/libhb/decvobsub.c index e180b232f..3b5177ca3 100644 --- a/libhb/decvobsub.c +++ b/libhb/decvobsub.c @@ -4,6 +4,26 @@ Homepage: <http://handbrake.fr/>. It may be used under the terms of the GNU General Public License. */ +/* + * 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]; + * } + */ + #include "hb.h" struct hb_work_private_s @@ -42,6 +62,21 @@ int decsubInit( hb_work_object_t * w, hb_job_t * job ) pv->job = job; pv->pts = -1; + + // Warn if the input color palette is empty + int paletteEmpty = 1; + int i; + for (i=0; i<16; i++) + { + if (w->subtitle->palette[i]) + { + paletteEmpty = 0; + break; + } + } + if (paletteEmpty) { + hb_log( "decvobsub: input color palette is empty; not demuxed properly?" ); + } return 0; } @@ -262,7 +297,7 @@ static void ParseControls( hb_work_object_t * w ) * work, but I get the right colours by doing * no conversion. */ - uint32_t color = title->palette[colors[j]]; + uint32_t color = w->subtitle->palette[colors[j]]; uint8_t Cr, Cb, y; y = (color>>16) & 0xff; Cr = (color>>8) & 0xff; |