+static int parse_ifo_palette(DVDSubContext *ctx, char *p)
+{
+ FILE *ifo;
+ char ifostr[12];
+ uint32_t sp_pgci, pgci, off_pgc, pgc;
+ uint8_t r, g, b, yuv[65], *buf;
+ int i, y, cb, cr, r_add, g_add, b_add;
+ int ret = 0;
+ const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
+
+ ctx->has_palette = 0;
+ if ((ifo = fopen(p, "r")) == NULL) {
+ av_log(ctx, AV_LOG_WARNING, "Unable to open IFO file \"%s\": %s\n", p, strerror(errno));
+ return AVERROR_EOF;
+ }
+ if (fread(ifostr, 12, 1, ifo) != 1 || memcmp(ifostr, "DVDVIDEO-VTS", 12)) {
+ av_log(ctx, AV_LOG_WARNING, "\"%s\" is not a proper IFO file\n", p);
+ ret = AVERROR_INVALIDDATA;
+ goto end;
+ }
+ if (fseek(ifo, 0xCC, SEEK_SET) == -1) {
+ ret = AVERROR(errno);
+ goto end;
+ }
+ if (fread(&sp_pgci, 4, 1, ifo) == 1) {
+ pgci = av_be2ne32(sp_pgci) * 2048;
+ if (fseek(ifo, pgci + 0x0C, SEEK_SET) == -1) {
+ ret = AVERROR(errno);
+ goto end;
+ }
+ if (fread(&off_pgc, 4, 1, ifo) == 1) {
+ pgc = pgci + av_be2ne32(off_pgc);
+ if (fseek(ifo, pgc + 0xA4, SEEK_SET) == -1) {
+ ret = AVERROR(errno);
+ goto end;
+ }
+ if (fread(yuv, 64, 1, ifo) == 1) {
+ buf = yuv;
+ for(i=0; i<16; i++) {
+ y = *++buf;
+ cr = *++buf;
+ cb = *++buf;
+ YUV_TO_RGB1_CCIR(cb, cr);
+ YUV_TO_RGB2_CCIR(r, g, b, y);
+ ctx->palette[i] = (r << 16) + (g << 8) + b;
+ buf++;
+ }
+ ctx->has_palette = 1;
+ }
+ }
+ }
+ if (ctx->has_palette == 0) {
+ av_log(ctx, AV_LOG_WARNING, "Failed to read palette from IFO file \"%s\"\n", p);
+ ret = AVERROR_INVALIDDATA;
+ }
+end:
+ fclose(ifo);
+ return ret;
+}
+