Lines Matching refs:idct
144 * scale up the chroma components via IDCT scaling rather than upsampling.
166 /* Size in samples, after IDCT scaling */
243 * limiting step (just after the IDCT), a wildly out-of-range value is
246 * post-IDCT limiting thus:
252 * For the post-IDCT step, we want to convert the data from signed to unsigned
254 * So the post-IDCT limiting table ends up looking like this:
262 * We can save some space by overlapping the start of the post-IDCT table
263 * with the simpler range limiting table. The post-IDCT table begins at
287 table += CENTERJSAMPLE; /* Point to where post-IDCT table starts */
288 /* End of simple table, rest of first half of post-IDCT table */
291 /* Second half of post-IDCT table */
487 (*cinfo->idct->start_pass) (cinfo);
