[FFmpeg-devel] [PATCH] avfilter/dctdnoiz: rewrite [f/i]dct
Timothy Gu
timothygu99 at gmail.com
Sun Aug 3 22:59:25 CEST 2014
On Aug 3, 2014 1:27 PM, "Clément Bœsch" <u at pkh.me> wrote:
>
> This removes the avcodec dependency and make the code almost twice as
> fast. More to come.
>
> The DCT factorization is based on "Fast and numerically stable
> algorithms for discrete cosine transforms" from Gerlind Plonkaa &
> Manfred Tasche (DOI: 10.1016/j.laa.2004.07.015).
> ---
> configure | 2 -
> libavfilter/vf_dctdnoiz.c | 328
+++++++++++++++++++++++++++++++++-------------
> 2 files changed, 240 insertions(+), 90 deletions(-)
This change warrants a Changelog entry.
>
> diff --git a/configure b/configure
> index 9c3af50..6196b2a 100755
> --- a/configure
> +++ b/configure
> @@ -2526,8 +2526,6 @@ boxblur_filter_deps="gpl"
> bs2b_filter_deps="libbs2b"
> colormatrix_filter_deps="gpl"
> cropdetect_filter_deps="gpl"
> -dctdnoiz_filter_deps="avcodec"
> -dctdnoiz_filter_select="dct"
> delogo_filter_deps="gpl"
> deshake_filter_deps="avcodec"
> deshake_filter_select="me_cmp"
> diff --git a/libavfilter/vf_dctdnoiz.c b/libavfilter/vf_dctdnoiz.c
> index 71b8536..6d24934 100644
> --- a/libavfilter/vf_dctdnoiz.c
> +++ b/libavfilter/vf_dctdnoiz.c
> @@ -1,5 +1,5 @@
> /*
> - * Copyright (c) 2013 Clément Bœsch
> + * Copyright (c) 2013-2014 Clément Bœsch
> *
> * This file is part of FFmpeg.
> *
> @@ -23,7 +23,6 @@
> * @see http://www.ipol.im/pub/art/2011/ys-dct/
> */
>
> -#include "libavcodec/avfft.h"
> #include "libavutil/eval.h"
> #include "libavutil/opt.h"
> #include "drawutils.h"
> @@ -35,7 +34,7 @@
> static const char *const var_names[] = { "c", NULL };
> enum { VAR_C, VAR_VARS_NB };
>
> -typedef struct {
> +typedef struct DCTdnoizContext {
> const AVClass *class;
>
> /* coefficient factor expression */
> @@ -52,8 +51,9 @@ typedef struct {
> int p_linesize; // line sizes for color and weights
> int overlap; // number of block overlapping pixels
> int step; // block step increment (BSIZE - overlap)
> - DCTContext *dct, *idct; // DCT and inverse DCT contexts
> - float *block, *tmp_block; // two BSIZE x BSIZE block buffers
> + void (*filter_freq_func)(struct DCTdnoizContext *s,
> + const float *src, int src_linesize,
> + float *dst, int dst_linesize);
> } DCTdnoizContext;
>
> #define OFFSET(x) offsetof(DCTdnoizContext, x)
> @@ -69,66 +69,245 @@ static const AVOption dctdnoiz_options[] = {
>
> AVFILTER_DEFINE_CLASS(dctdnoiz);
>
> -static float *dct_block(DCTdnoizContext *ctx, const float *src, int
src_linesize)
> +static void av_always_inline fdct16_1d(float *dst, const float *src,
> + int dst_stridea, int dst_strideb,
> + int src_stridea, int src_strideb)
> {
> - int x, y;
> - float *column;
> -
> - for (y = 0; y < BSIZE; y++) {
> - float *line = ctx->block;
> + int i;
>
> - memcpy(line, src, BSIZE * sizeof(*line));
> - src += src_linesize;
> - av_dct_calc(ctx->dct, line);
> -
> - column = ctx->tmp_block + y;
> - column[0] = line[0] * (1. / sqrt(BSIZE));
> - column += BSIZE;
> - for (x = 1; x < BSIZE; x++) {
> - *column = line[x] * sqrt(2. / BSIZE);
> - column += BSIZE;
> - }
> + for (i = 0; i < BSIZE; i++) {
> + const float x0_0 = src[ 0*src_stridea] + src[15*src_stridea];
> + const float x0_1 = src[ 1*src_stridea] + src[14*src_stridea];
> + const float x0_2 = src[ 2*src_stridea] + src[13*src_stridea];
> + const float x0_3 = src[ 3*src_stridea] + src[12*src_stridea];
> + const float x0_4 = src[ 4*src_stridea] + src[11*src_stridea];
> + const float x0_5 = src[ 5*src_stridea] + src[10*src_stridea];
> + const float x0_6 = src[ 6*src_stridea] + src[ 9*src_stridea];
> + const float x0_7 = src[ 7*src_stridea] + src[ 8*src_stridea];
> + const float x0_8 = src[ 0*src_stridea] - src[15*src_stridea];
> + const float x0_9 = src[ 1*src_stridea] - src[14*src_stridea];
> + const float x0_a = src[ 2*src_stridea] - src[13*src_stridea];
> + const float x0_b = src[ 3*src_stridea] - src[12*src_stridea];
> + const float x0_c = src[ 4*src_stridea] - src[11*src_stridea];
> + const float x0_d = src[ 5*src_stridea] - src[10*src_stridea];
> + const float x0_e = src[ 6*src_stridea] - src[ 9*src_stridea];
> + const float x0_f = src[ 7*src_stridea] - src[ 8*src_stridea];
> + const float x2_0 = x0_0 + x0_7;
> + const float x2_1 = x0_1 + x0_6;
> + const float x2_2 = x0_2 + x0_5;
> + const float x2_3 = x0_3 + x0_4;
> + const float x2_4 = x0_0 - x0_7;
> + const float x2_5 = x0_1 - x0_6;
> + const float x2_6 = x0_2 - x0_5;
> + const float x2_7 = x0_3 - x0_4;
> + const float x4_0 = x2_0 + x2_3;
> + const float x4_1 = x2_1 + x2_2;
> + const float x4_2 = x2_0 - x2_3;
> + const float x4_3 = x2_1 - x2_2;
> + const float x5_0 = x4_0 + x4_1;
> + const float x5_1 = x4_0 - x4_1;
> + const float x5_2 = 1.306562964876380*x4_2 +
0.541196100146197*x4_3;
> + const float x5_3 = 0.541196100146197*x4_2 -
1.306562964876380*x4_3;
> + const float x6_0 = 1.387039845322150*x2_4 +
0.275899379282943*x2_7;
> + const float x6_1 = 1.175875602419360*x2_5 +
0.785694958387102*x2_6;
> + const float x6_2 = -0.785694958387102*x2_5 +
1.175875602419360*x2_6;
> + const float x6_3 = 0.275899379282943*x2_4 -
1.387039845322150*x2_7;
> + const float x7_0 = x6_0 + x6_1;
> + const float x7_1 = x6_0 - x6_1;
> + const float x7_2 = x6_2 + x6_3;
> + const float x7_3 = x6_2 - x6_3;
> + const float x3_5 = 0.707106781186547*x7_1 -
0.707106781186547*x7_3;
> + const float x3_6 = 0.707106781186547*x7_1 +
0.707106781186547*x7_3;
> + const float x8_0 = 1.407403737526380*x0_8 +
0.138617169199091*x0_f;
> + const float x8_1 = 1.353318001174350*x0_9 +
0.410524527522357*x0_e;
> + const float x8_2 = 1.247225012986670*x0_a +
0.666655658477747*x0_d;
> + const float x8_3 = 1.093201867001760*x0_b +
0.897167586342636*x0_c;
> + const float x8_4 = -0.897167586342636*x0_b +
1.093201867001760*x0_c;
> + const float x8_5 = 0.666655658477747*x0_a -
1.247225012986670*x0_d;
> + const float x8_6 = -0.410524527522357*x0_9 +
1.353318001174350*x0_e;
> + const float x8_7 = 0.138617169199091*x0_8 -
1.407403737526380*x0_f;
> + const float xa_0 = x8_0 + x8_3;
> + const float xa_1 = x8_1 + x8_2;
> + const float xa_2 = x8_0 - x8_3;
> + const float xa_3 = x8_1 - x8_2;
> + const float xb_0 = xa_0 + xa_1;
> + const float xb_1 = xa_0 - xa_1;
> + const float xb_2 = 1.306562964876380*xa_2 +
0.541196100146197*xa_3;
> + const float xb_3 = 0.541196100146197*xa_2 -
1.306562964876380*xa_3;
> + const float xc_0 = x8_4 + x8_7;
> + const float xc_1 = x8_5 + x8_6;
> + const float xc_2 = x8_4 - x8_7;
> + const float xc_3 = x8_5 - x8_6;
> + const float xd_0 = xc_0 + xc_1;
> + const float xd_1 = xc_0 - xc_1;
> + const float xd_2 = 1.306562964876380*xc_2 +
0.541196100146197*xc_3;
> + const float xd_3 = 0.541196100146197*xc_2 -
1.306562964876380*xc_3;
> + const float x1_9 = 0.707106781186547*xb_2 -
0.707106781186547*xd_3;
> + const float x1_a = 0.707106781186547*xb_2 +
0.707106781186547*xd_3;
> + const float x1_b = 0.707106781186547*xb_1 +
0.707106781186547*xd_1;
> + const float x1_c = 0.707106781186547*xb_1 -
0.707106781186547*xd_1;
> + const float x1_d = 0.707106781186547*xb_3 -
0.707106781186547*xd_2;
> + const float x1_e = 0.707106781186547*xb_3 +
0.707106781186547*xd_2;
> + dst[ 0*dst_stridea] = 0.25*x5_0;
> + dst[ 1*dst_stridea] = 0.25*xb_0;
> + dst[ 2*dst_stridea] = 0.25*x7_0;
> + dst[ 3*dst_stridea] = 0.25*x1_9;
> + dst[ 4*dst_stridea] = 0.25*x5_2;
> + dst[ 5*dst_stridea] = 0.25*x1_a;
> + dst[ 6*dst_stridea] = 0.25*x3_5;
> + dst[ 7*dst_stridea] = 0.25*x1_b;
> + dst[ 8*dst_stridea] = 0.25*x5_1;
> + dst[ 9*dst_stridea] = 0.25*x1_c;
> + dst[10*dst_stridea] = 0.25*x3_6;
> + dst[11*dst_stridea] = 0.25*x1_d;
> + dst[12*dst_stridea] = 0.25*x5_3;
> + dst[13*dst_stridea] = 0.25*x1_e;
> + dst[14*dst_stridea] = 0.25*x7_2;
> + dst[15*dst_stridea] = 0.25*xd_0;
> + dst += dst_strideb;
> + src += src_strideb;
> }
> +}
>
> - column = ctx->tmp_block;
> - for (x = 0; x < BSIZE; x++) {
> - av_dct_calc(ctx->dct, column);
> - column[0] *= 1. / sqrt(BSIZE);
> - for (y = 1; y < BSIZE; y++)
> - column[y] *= sqrt(2. / BSIZE);
> - column += BSIZE;
> +static void av_always_inline idct16_1d(float *dst, const float *src,
> + int dst_stridea, int dst_strideb,
> + int src_stridea, int src_strideb,
> + int add)
> +{
> + int i;
> +
> + for (i = 0; i < BSIZE; i++) {
> + const float x0_0 = 1.414213562373100*src[ 0*src_stridea];
> + const float x0_1 = 1.407403737526380*src[ 1*src_stridea] +
0.138617169199091*src[15*src_stridea];
> + const float x0_2 = 1.387039845322150*src[ 2*src_stridea] +
0.275899379282943*src[14*src_stridea];
> + const float x0_3 = 1.353318001174350*src[ 3*src_stridea] +
0.410524527522357*src[13*src_stridea];
> + const float x0_4 = 1.306562964876380*src[ 4*src_stridea] +
0.541196100146197*src[12*src_stridea];
> + const float x0_5 = 1.247225012986670*src[ 5*src_stridea] +
0.666655658477747*src[11*src_stridea];
> + const float x0_6 = 1.175875602419360*src[ 6*src_stridea] +
0.785694958387102*src[10*src_stridea];
> + const float x0_7 = 1.093201867001760*src[ 7*src_stridea] +
0.897167586342636*src[ 9*src_stridea];
> + const float x0_8 = 1.414213562373100*src[ 8*src_stridea];
> + const float x0_9 = -0.897167586342636*src[ 7*src_stridea] +
1.093201867001760*src[ 9*src_stridea];
> + const float x0_a = 0.785694958387102*src[ 6*src_stridea] -
1.175875602419360*src[10*src_stridea];
> + const float x0_b = -0.666655658477747*src[ 5*src_stridea] +
1.247225012986670*src[11*src_stridea];
> + const float x0_c = 0.541196100146197*src[ 4*src_stridea] -
1.306562964876380*src[12*src_stridea];
> + const float x0_d = -0.410524527522357*src[ 3*src_stridea] +
1.353318001174350*src[13*src_stridea];
> + const float x0_e = 0.275899379282943*src[ 2*src_stridea] -
1.387039845322150*src[14*src_stridea];
> + const float x0_f = -0.138617169199091*src[ 1*src_stridea] +
1.407403737526380*src[15*src_stridea];
> + const float x2_0 = x0_0 + x0_8;
> + const float x2_1 = x0_1 + x0_7;
> + const float x2_2 = x0_2 + x0_6;
> + const float x2_3 = x0_3 + x0_5;
> + const float x2_4 = 1.4142135623731*x0_4;
> + const float x2_5 = x0_0 - x0_8;
> + const float x2_6 = x0_1 - x0_7;
> + const float x2_7 = x0_2 - x0_6;
> + const float x2_8 = x0_3 - x0_5;
> + const float x4_0 = x2_0 + x2_4;
> + const float x4_1 = x2_1 + x2_3;
> + const float x4_2 = 1.4142135623731*x2_2;
> + const float x4_3 = x2_0 - x2_4;
> + const float x4_4 = x2_1 - x2_3;
> + const float x5_0 = 0.5*x4_0 + 0.707106781186548*x4_1 + 0.5*x4_2;
> + const float x5_1 = 0.707106781186548*x4_0 -
0.707106781186548*x4_2;
> + const float x5_2 = 0.5*x4_0 - 0.707106781186548*x4_1 + 0.5*x4_2;
> + const float x5_3 = 0.707106781186547*x4_3 +
0.707106781186547*x4_4;
> + const float x5_4 = 0.707106781186547*x4_3 -
0.707106781186547*x4_4;
> + const float x6_0 = 1.4142135623731*x2_5;
> + const float x6_1 = 1.30656296487638*x2_6 +
0.541196100146197*x2_8;
> + const float x6_2 = 1.4142135623731*x2_7;
> + const float x6_3 = -0.541196100146197*x2_6 +
1.30656296487638*x2_8;
> + const float x7_0 = 0.5*x6_0 + 0.707106781186548*x6_1 + 0.5*x6_2;
> + const float x7_1 = 0.707106781186548*x6_0 -
0.707106781186548*x6_2;
> + const float x7_2 = 0.5*x6_0 - 0.707106781186548*x6_1 + 0.5*x6_2;
> + const float x3_6 = 0.707106781186547*x7_1 -
0.707106781186547*x6_3;
> + const float x3_7 = 0.707106781186547*x7_1 +
0.707106781186547*x6_3;
> + const float x8_0 = 1.4142135623731*x0_c;
> + const float x8_1 = x0_b + x0_d;
> + const float x8_2 = x0_a + x0_e;
> + const float x8_3 = x0_9 + x0_f;
> + const float x8_4 = x0_9 - x0_f;
> + const float x8_5 = x0_a - x0_e;
> + const float x8_6 = x0_b - x0_d;
> + const float xa_0 = 1.4142135623731*x8_0;
> + const float xa_1 = 1.30656296487638*x8_1 +
0.541196100146197*x8_3;
> + const float xa_2 = 1.4142135623731*x8_2;
> + const float xa_3 = -0.541196100146197*x8_1 +
1.30656296487638*x8_3;
> + const float xb_0 = 0.5*xa_0 + 0.707106781186548*xa_1 + 0.5*xa_2;
> + const float xb_1 = 0.707106781186548*xa_0 -
0.707106781186548*xa_2;
> + const float xb_2 = 0.5*xa_0 - 0.707106781186548*xa_1 + 0.5*xa_2;
> + const float x9_1 = 0.707106781186547*xb_1 -
0.707106781186547*xa_3;
> + const float x9_2 = 0.707106781186547*xb_1 +
0.707106781186547*xa_3;
> + const float xc_0 = 1.4142135623731*x8_5;
> + const float xc_1 = x8_4 + x8_6;
> + const float xc_2 = x8_4 - x8_6;
> + const float xd_0 = 0.707106781186547*xc_0 +
0.707106781186547*xc_1;
> + const float xd_1 = 0.707106781186547*xc_0 -
0.707106781186547*xc_1;
> + const float x9_6 = -xd_1;
> + const float x1_b = -x9_1;
> + const float x1_f = -xb_2;
> + dst[ 0*dst_stridea] = (add ? dst[ 0*dst_stridea] : 0) +
0.353553390593274*x5_0;
> + dst[ 1*dst_stridea] = (add ? dst[ 1*dst_stridea] : 0) +
0.25*x7_0 - 0.25*x1_f;
> + dst[ 2*dst_stridea] = (add ? dst[ 2*dst_stridea] : 0) +
0.25*x7_0 + 0.25*x1_f;
> + dst[ 3*dst_stridea] = (add ? dst[ 3*dst_stridea] : 0) +
0.25*x5_3 + 0.25*x9_6;
> + dst[ 4*dst_stridea] = (add ? dst[ 4*dst_stridea] : 0) +
0.25*x5_3 - 0.25*x9_6;
> + dst[ 5*dst_stridea] = (add ? dst[ 5*dst_stridea] : 0) +
0.25*x3_6 - 0.25*x9_2;
> + dst[ 6*dst_stridea] = (add ? dst[ 6*dst_stridea] : 0) +
0.25*x3_6 + 0.25*x9_2;
> + dst[ 7*dst_stridea] = (add ? dst[ 7*dst_stridea] : 0) +
0.25*x5_1 + 0.25*xc_2;
> + dst[ 8*dst_stridea] = (add ? dst[ 8*dst_stridea] : 0) +
0.25*x5_1 - 0.25*xc_2;
> + dst[ 9*dst_stridea] = (add ? dst[ 9*dst_stridea] : 0) +
0.25*x3_7 - 0.25*x1_b;
> + dst[10*dst_stridea] = (add ? dst[10*dst_stridea] : 0) +
0.25*x3_7 + 0.25*x1_b;
> + dst[11*dst_stridea] = (add ? dst[11*dst_stridea] : 0) +
0.25*x5_4 + 0.25*xd_0;
> + dst[12*dst_stridea] = (add ? dst[12*dst_stridea] : 0) +
0.25*x5_4 - 0.25*xd_0;
> + dst[13*dst_stridea] = (add ? dst[13*dst_stridea] : 0) +
0.25*x7_2 - 0.25*xb_0;
> + dst[14*dst_stridea] = (add ? dst[14*dst_stridea] : 0) +
0.25*x7_2 + 0.25*xb_0;
> + dst[15*dst_stridea] = (add ? dst[15*dst_stridea] : 0) +
0.353553390593274*x5_2;
> + dst += dst_strideb;
> + src += src_strideb;
> }
> +}
>
> - for (y = 0; y < BSIZE; y++)
> - for (x = 0; x < BSIZE; x++)
> - ctx->block[y*BSIZE + x] = ctx->tmp_block[x*BSIZE + y];
> +static av_always_inline void filter_freq(const float *src, int
src_linesize,
> + float *dst, int dst_linesize,
> + AVExpr *expr, double
*var_values,
> + int sigma_th)
> +{
> + unsigned i;
> + DECLARE_ALIGNED(32, float, tmp_block1)[BSIZE * BSIZE];
> + DECLARE_ALIGNED(32, float, tmp_block2)[BSIZE * BSIZE];
> +
> + /* forward DCT */
> + fdct16_1d(tmp_block1, src, 1, BSIZE, 1, src_linesize);
> + fdct16_1d(tmp_block2, tmp_block1, BSIZE, 1, BSIZE, 1);
> +
> + for (i = 0; i < BSIZE*BSIZE; i++) {
> + float *b = &tmp_block2[i];
> + /* frequency filtering */
> + if (expr) {
> + var_values[VAR_C] = FFABS(*b);
> + *b *= av_expr_eval(expr, var_values, NULL);
> + } else {
> + if (FFABS(*b) < sigma_th)
> + *b = 0;
> + }
> + }
>
> - return ctx->block;
> + /* inverse DCT */
> + idct16_1d(tmp_block1, tmp_block2, 1, BSIZE, 1, BSIZE, 0);
> + idct16_1d(dst, tmp_block1, dst_linesize, 1, BSIZE, 1, 1);
> }
>
> -static void idct_block(DCTdnoizContext *ctx, float *dst, int
dst_linesize)
> +static void filter_freq_sigma(DCTdnoizContext *s,
> + const float *src, int src_linesize,
> + float *dst, int dst_linesize)
> {
> - int x, y;
> - float *block = ctx->block;
> - float *tmp = ctx->tmp_block;
> -
> - for (y = 0; y < BSIZE; y++) {
> - block[0] *= sqrt(BSIZE);
> - for (x = 1; x < BSIZE; x++)
> - block[x] *= 1./sqrt(2. / BSIZE);
> - av_dct_calc(ctx->idct, block);
> - block += BSIZE;
> - }
> + filter_freq(src, src_linesize, dst, dst_linesize, NULL, NULL, s->th);
> +}
>
> - block = ctx->block;
> - for (y = 0; y < BSIZE; y++) {
> - tmp[0] = block[y] * sqrt(BSIZE);
> - for (x = 1; x < BSIZE; x++)
> - tmp[x] = block[x*BSIZE + y] * (1./sqrt(2. / BSIZE));
> - av_dct_calc(ctx->idct, tmp);
> - for (x = 0; x < BSIZE; x++)
> - dst[x*dst_linesize + y] += tmp[x];
> - }
> +static void filter_freq_expr(DCTdnoizContext *s,
> + const float *src, int src_linesize,
> + float *dst, int dst_linesize)
> +{
> + filter_freq(src, src_linesize, dst, dst_linesize, s->expr,
s->var_values, 0);
> }
>
> static int config_input(AVFilterLink *inlink)
> @@ -194,18 +373,13 @@ static av_cold int init(AVFilterContext *ctx)
> NULL, NULL, NULL, NULL, 0, ctx);
> if (ret < 0)
> return ret;
> + s->filter_freq_func = filter_freq_expr;
> + } else {
> + s->filter_freq_func = filter_freq_sigma;
> }
Missing "if (s->expr)"?
>
> s->th = s->sigma * 3.;
> s->step = BSIZE - s->overlap;
> - s->dct = av_dct_init(NBITS, DCT_II);
> - s->idct = av_dct_init(NBITS, DCT_III);
> - s->block = av_malloc(BSIZE * BSIZE * sizeof(*s->block));
> - s->tmp_block = av_malloc(BSIZE * BSIZE * sizeof(*s->tmp_block));
> -
> - if (!s->dct || !s->idct || !s->tmp_block || !s->block)
> - return AVERROR(ENOMEM);
> -
> return 0;
> }
>
> @@ -272,7 +446,7 @@ static void filter_plane(AVFilterContext *ctx,
> const float *src, int src_linesize,
> int w, int h)
> {
> - int x, y, bx, by;
> + int x, y;
> DCTdnoizContext *s = ctx->priv;
> float *dst0 = dst;
> const float *weights = s->weights;
> @@ -282,27 +456,9 @@ static void filter_plane(AVFilterContext *ctx,
>
> // block dct sums
> for (y = 0; y < h - BSIZE + 1; y += s->step) {
> - for (x = 0; x < w - BSIZE + 1; x += s->step) {
> - float *ftb = dct_block(s, src + x, src_linesize);
> -
> - if (s->expr) {
> - for (by = 0; by < BSIZE; by++) {
> - for (bx = 0; bx < BSIZE; bx++) {
> - s->var_values[VAR_C] = FFABS(*ftb);
> - *ftb++ *= av_expr_eval(s->expr, s->var_values,
s);
> - }
> - }
> - } else {
> - for (by = 0; by < BSIZE; by++) {
> - for (bx = 0; bx < BSIZE; bx++) {
> - if (FFABS(*ftb) < s->th)
> - *ftb = 0;
> - ftb++;
> - }
> - }
> - }
> - idct_block(s, dst + x, dst_linesize);
> - }
> + for (x = 0; x < w - BSIZE + 1; x += s->step)
> + s->filter_freq_func(s, src + x, src_linesize,
> + dst + x, dst_linesize);
> src += s->step * src_linesize;
> dst += s->step * dst_linesize;
> }
> @@ -388,10 +544,6 @@ static av_cold void uninit(AVFilterContext *ctx)
> int i;
> DCTdnoizContext *s = ctx->priv;
>
> - av_dct_end(s->dct);
> - av_dct_end(s->idct);
> - av_free(s->block);
> - av_free(s->tmp_block);
> av_free(s->weights);
> for (i = 0; i < 2; i++) {
> av_free(s->cbuf[i][0]);
> --
> 2.0.2
>
> _______________________________________________
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> ffmpeg-devel at ffmpeg.org
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