From: Mans Rullgard Date: Mon, 16 May 2011 14:57:04 +0000 (+0100) Subject: dct: bypass table allocation for DCT_II of size 32 X-Git-Tag: v0.7rc1~462 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=721d6f2dc5437df21ae17923b29fa2be847764c7;p=platform%2Fupstream%2Flibav.git dct: bypass table allocation for DCT_II of size 32 The size-32 DCT_II has a special implementation which doesn't use the normal tables. Skipping allocation of these in this case saves some memory. Signed-off-by: Mans Rullgard --- diff --git a/libavcodec/dct.c b/libavcodec/dct.c index 83ea00f9c..e7a8f227b 100644 --- a/libavcodec/dct.c +++ b/libavcodec/dct.c @@ -180,9 +180,14 @@ av_cold int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType inverse) int n = 1 << nbits; int i; + memset(s, 0, sizeof(*s)); + s->nbits = nbits; s->inverse = inverse; + if (inverse == DCT_II && nbits == 5) { + s->dct_calc = dct32_func; + } else { ff_init_ff_cos_tabs(nbits+2); s->costab = ff_cos_tabs[nbits+2]; @@ -203,9 +208,7 @@ av_cold int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType inverse) case DCT_III: s->dct_calc = ff_dct_calc_III_c; break; case DST_I : s->dct_calc = ff_dst_calc_I_c; break; } - - if (inverse == DCT_II && nbits == 5) - s->dct_calc = dct32_func; + } s->dct32 = dct32; if (HAVE_MMX) ff_dct_init_mmx(s);