Lines Matching refs:idct
127 * scale up the chroma components via IDCT scaling rather than upsampling.
149 /* Size in samples, after IDCT scaling */
220 * limiting step (just after the IDCT), a wildly out-of-range value is
223 * post-IDCT limiting thus:
229 * For the post-IDCT step, we want to convert the data from signed to unsigned
231 * So the post-IDCT limiting table ends up looking like this:
239 * We can save some space by overlapping the start of the post-IDCT table
240 * with the simpler range limiting table. The post-IDCT table begins at
264 table += CENTERJSAMPLE; /* Point to where post-IDCT table starts */
265 /* End of simple table, rest of first half of post-IDCT table */
268 /* Second half of post-IDCT table */
464 (*cinfo->idct->start_pass) (cinfo);
