Function ffmpeg_parse_vobsub_extradata_mp4

libhb/stream.c:5733–5759

* Format: 8-bit {0,Y,Cb,Cr} x 16 */

 * Format: 8-bit {0,Y,Cb,Cr} x 16
 */
static int ffmpeg_parse_vobsub_extradata_mp4( AVCodecParameters *codecpar,
                                              hb_subtitle_t *subtitle )
{
    if ( codecpar->extradata_size != 4*16 )
        return 1;

    int i, j;
    for ( i=0, j=0; i<16; i++, j+=4 )
    {
        subtitle->palette[i] =
            codecpar->extradata[j+1] << 16 |   // Y
            codecpar->extradata[j+2] << 8  |   // Cb
            codecpar->extradata[j+3] << 0;     // Cr
        subtitle->palette_set = 1;
    }
    if (codecpar->width <= 0 || codecpar->height <= 0)
    {
        subtitle->width = 720;
        subtitle->height = 480;
    }
    else
    {
        subtitle->width = codecpar->width;
        subtitle->height = codecpar->height;
    }
    return 0;
}

/*
 * Parses the 'subtitle->palette' information from the specific VOB subtitle track's private data.