Revision 05493021

View differences:

libavcodec/dsputil.h
240 240
    
241 241
    /**
242 242
     * idct input permutation.
243
     * several optimized IDCTs need a permutated input (relative to the normal order of the reference
244
     * IDCT)
245
     * this permutation must be performed before the idct_put/add, note, normally this can be merged
246
     * with the zigzag/alternate scan<br>
243 247
     * an example to avoid confusion:
244 248
     * - (->decode coeffs -> zigzag reorder -> dequant -> reference idct ->...)
245 249
     * - (x -> referece dct -> reference idct -> x)

Also available in: Unified diff