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Code Issues Releases Activity

lavu/tx: remove special -1 inverted lookup mode

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It was somewhat hacky and unnecessary.
This commit is contained in:
Lynne 2022-09-23 10:32:39 +02:00
parent 74e8541bab
commit e7a987d7c9
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GPG Key ID: A2FEA5F03F034464
2 changed files with 2 additions and 6 deletions
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5
libavutil/tx.c
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@ -213,7 +213,7 @@ int ff_tx_gen_split_radix_parity_revtab(AVTXContext *s, int len, int inv,
if (len < basis)
return AVERROR(EINVAL);
if (!(s->map = av_mallocz((inv_lookup == -1 ? 2 : 1)*len*sizeof(*s->map))))
if (!(s->map = av_mallocz(len*sizeof(*s->map))))
return AVERROR(ENOMEM);
av_assert0(!dual_stride || !(dual_stride & (dual_stride - 1)));
@ -221,9 +221,6 @@ int ff_tx_gen_split_radix_parity_revtab(AVTXContext *s, int len, int inv,
parity_revtab_generator(s->map, len, inv, 0, 0, 0, len,
basis, dual_stride, inv_lookup != 0);
if (inv_lookup == -1)
parity_revtab_generator(s->map + len, len, inv, 0, 0, 0, len,
basis, dual_stride, 0);
return 0;
}

3
libavutil/tx_priv.h
View File

@ -290,8 +290,7 @@ int ff_tx_gen_ptwo_inplace_revtab_idx(AVTXContext *s);
* If length is smaller than basis/2 this function will not do anything.
*
* If inv_lookup is set to 1, it will flip the lookup from out[map[i]] = src[i]
* to out[i] = src[map[i]]. If set to -1, will generate 2 maps, the first one
* flipped, the second one regular.
* to out[i] = src[map[i]].
*/
int ff_tx_gen_split_radix_parity_revtab(AVTXContext *s, int len, int inv,
int inv_lookup, int basis, int dual_stride);