| /* |
| * Copyright (c) 2013-2014 Clément Bœsch |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * A simple, relatively efficient and slow DCT image denoiser. |
| * |
| * @see http://www.ipol.im/pub/art/2011/ys-dct/ |
| * |
| * The DCT factorization used 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). |
| */ |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/eval.h" |
| #include "libavutil/opt.h" |
| #include "internal.h" |
| |
| static const char *const var_names[] = { "c", NULL }; |
| enum { VAR_C, VAR_VARS_NB }; |
| |
| #define MAX_THREADS 8 |
| |
| typedef struct DCTdnoizContext { |
| const AVClass *class; |
| |
| /* coefficient factor expression */ |
| char *expr_str; |
| AVExpr *expr[MAX_THREADS]; |
| double var_values[MAX_THREADS][VAR_VARS_NB]; |
| |
| int nb_threads; |
| int pr_width, pr_height; // width and height to process |
| float sigma; // used when no expression are st |
| float th; // threshold (3*sigma) |
| float *cbuf[2][3]; // two planar rgb color buffers |
| float *slices[MAX_THREADS]; // slices buffers (1 slice buffer per thread) |
| float *weights; // dct coeff are cumulated with overlapping; these values are used for averaging |
| int p_linesize; // line sizes for color and weights |
| int overlap; // number of block overlapping pixels |
| int step; // block step increment (blocksize - overlap) |
| int n; // 1<<n is the block size |
| int bsize; // block size, 1<<n |
| void (*filter_freq_func)(struct DCTdnoizContext *s, |
| const float *src, int src_linesize, |
| float *dst, int dst_linesize, |
| int thread_id); |
| void (*color_decorrelation)(float **dst, int dst_linesize, |
| const uint8_t **src, int src_linesize, |
| int w, int h); |
| void (*color_correlation)(uint8_t **dst, int dst_linesize, |
| float **src, int src_linesize, |
| int w, int h); |
| } DCTdnoizContext; |
| |
| #define MIN_NBITS 3 /* blocksize = 1<<3 = 8 */ |
| #define MAX_NBITS 4 /* blocksize = 1<<4 = 16 */ |
| #define DEFAULT_NBITS 3 |
| |
| #define OFFSET(x) offsetof(DCTdnoizContext, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| static const AVOption dctdnoiz_options[] = { |
| { "sigma", "set noise sigma constant", OFFSET(sigma), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 999, .flags = FLAGS }, |
| { "s", "set noise sigma constant", OFFSET(sigma), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 999, .flags = FLAGS }, |
| { "overlap", "set number of block overlapping pixels", OFFSET(overlap), AV_OPT_TYPE_INT, {.i64=-1}, -1, (1<<MAX_NBITS)-1, .flags = FLAGS }, |
| { "expr", "set coefficient factor expression", OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS }, |
| { "e", "set coefficient factor expression", OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS }, |
| { "n", "set the block size, expressed in bits", OFFSET(n), AV_OPT_TYPE_INT, {.i64=DEFAULT_NBITS}, MIN_NBITS, MAX_NBITS, .flags = FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(dctdnoiz); |
| |
| static void av_always_inline fdct8_1d(float *dst, const float *src, |
| int dst_stridea, int dst_strideb, |
| int src_stridea, int src_strideb) |
| { |
| int i; |
| |
| for (i = 0; i < 8; i++) { |
| const float x00 = src[0*src_stridea] + src[7*src_stridea]; |
| const float x01 = src[1*src_stridea] + src[6*src_stridea]; |
| const float x02 = src[2*src_stridea] + src[5*src_stridea]; |
| const float x03 = src[3*src_stridea] + src[4*src_stridea]; |
| const float x04 = src[0*src_stridea] - src[7*src_stridea]; |
| const float x05 = src[1*src_stridea] - src[6*src_stridea]; |
| const float x06 = src[2*src_stridea] - src[5*src_stridea]; |
| const float x07 = src[3*src_stridea] - src[4*src_stridea]; |
| const float x08 = x00 + x03; |
| const float x09 = x01 + x02; |
| const float x0a = x00 - x03; |
| const float x0b = x01 - x02; |
| const float x0c = 1.38703984532215f*x04 + 0.275899379282943f*x07; |
| const float x0d = 1.17587560241936f*x05 + 0.785694958387102f*x06; |
| const float x0e = -0.785694958387102f*x05 + 1.17587560241936f*x06; |
| const float x0f = 0.275899379282943f*x04 - 1.38703984532215f*x07; |
| const float x10 = 0.353553390593274f * (x0c - x0d); |
| const float x11 = 0.353553390593274f * (x0e - x0f); |
| dst[0*dst_stridea] = 0.353553390593274f * (x08 + x09); |
| dst[1*dst_stridea] = 0.353553390593274f * (x0c + x0d); |
| dst[2*dst_stridea] = 0.461939766255643f*x0a + 0.191341716182545f*x0b; |
| dst[3*dst_stridea] = 0.707106781186547f * (x10 - x11); |
| dst[4*dst_stridea] = 0.353553390593274f * (x08 - x09); |
| dst[5*dst_stridea] = 0.707106781186547f * (x10 + x11); |
| dst[6*dst_stridea] = 0.191341716182545f*x0a - 0.461939766255643f*x0b; |
| dst[7*dst_stridea] = 0.353553390593274f * (x0e + x0f); |
| dst += dst_strideb; |
| src += src_strideb; |
| } |
| } |
| |
| static void av_always_inline idct8_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 < 8; i++) { |
| const float x00 = 1.4142135623731f *src[0*src_stridea]; |
| const float x01 = 1.38703984532215f *src[1*src_stridea] + 0.275899379282943f*src[7*src_stridea]; |
| const float x02 = 1.30656296487638f *src[2*src_stridea] + 0.541196100146197f*src[6*src_stridea]; |
| const float x03 = 1.17587560241936f *src[3*src_stridea] + 0.785694958387102f*src[5*src_stridea]; |
| const float x04 = 1.4142135623731f *src[4*src_stridea]; |
| const float x05 = -0.785694958387102f*src[3*src_stridea] + 1.17587560241936f*src[5*src_stridea]; |
| const float x06 = 0.541196100146197f*src[2*src_stridea] - 1.30656296487638f*src[6*src_stridea]; |
| const float x07 = -0.275899379282943f*src[1*src_stridea] + 1.38703984532215f*src[7*src_stridea]; |
| const float x09 = x00 + x04; |
| const float x0a = x01 + x03; |
| const float x0b = 1.4142135623731f*x02; |
| const float x0c = x00 - x04; |
| const float x0d = x01 - x03; |
| const float x0e = 0.353553390593274f * (x09 - x0b); |
| const float x0f = 0.353553390593274f * (x0c + x0d); |
| const float x10 = 0.353553390593274f * (x0c - x0d); |
| const float x11 = 1.4142135623731f*x06; |
| const float x12 = x05 + x07; |
| const float x13 = x05 - x07; |
| const float x14 = 0.353553390593274f * (x11 + x12); |
| const float x15 = 0.353553390593274f * (x11 - x12); |
| const float x16 = 0.5f*x13; |
| dst[0*dst_stridea] = (add ? dst[ 0*dst_stridea] : 0) + 0.25f * (x09 + x0b) + 0.353553390593274f*x0a; |
| dst[1*dst_stridea] = (add ? dst[ 1*dst_stridea] : 0) + 0.707106781186547f * (x0f + x15); |
| dst[2*dst_stridea] = (add ? dst[ 2*dst_stridea] : 0) + 0.707106781186547f * (x0f - x15); |
| dst[3*dst_stridea] = (add ? dst[ 3*dst_stridea] : 0) + 0.707106781186547f * (x0e + x16); |
| dst[4*dst_stridea] = (add ? dst[ 4*dst_stridea] : 0) + 0.707106781186547f * (x0e - x16); |
| dst[5*dst_stridea] = (add ? dst[ 5*dst_stridea] : 0) + 0.707106781186547f * (x10 - x14); |
| dst[6*dst_stridea] = (add ? dst[ 6*dst_stridea] : 0) + 0.707106781186547f * (x10 + x14); |
| dst[7*dst_stridea] = (add ? dst[ 7*dst_stridea] : 0) + 0.25f * (x09 + x0b) - 0.353553390593274f*x0a; |
| dst += dst_strideb; |
| src += src_strideb; |
| } |
| } |
| |
| |
| 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 i; |
| |
| for (i = 0; i < 16; i++) { |
| const float x00 = src[ 0*src_stridea] + src[15*src_stridea]; |
| const float x01 = src[ 1*src_stridea] + src[14*src_stridea]; |
| const float x02 = src[ 2*src_stridea] + src[13*src_stridea]; |
| const float x03 = src[ 3*src_stridea] + src[12*src_stridea]; |
| const float x04 = src[ 4*src_stridea] + src[11*src_stridea]; |
| const float x05 = src[ 5*src_stridea] + src[10*src_stridea]; |
| const float x06 = src[ 6*src_stridea] + src[ 9*src_stridea]; |
| const float x07 = src[ 7*src_stridea] + src[ 8*src_stridea]; |
| const float x08 = src[ 0*src_stridea] - src[15*src_stridea]; |
| const float x09 = src[ 1*src_stridea] - src[14*src_stridea]; |
| const float x0a = src[ 2*src_stridea] - src[13*src_stridea]; |
| const float x0b = src[ 3*src_stridea] - src[12*src_stridea]; |
| const float x0c = src[ 4*src_stridea] - src[11*src_stridea]; |
| const float x0d = src[ 5*src_stridea] - src[10*src_stridea]; |
| const float x0e = src[ 6*src_stridea] - src[ 9*src_stridea]; |
| const float x0f = src[ 7*src_stridea] - src[ 8*src_stridea]; |
| const float x10 = x00 + x07; |
| const float x11 = x01 + x06; |
| const float x12 = x02 + x05; |
| const float x13 = x03 + x04; |
| const float x14 = x00 - x07; |
| const float x15 = x01 - x06; |
| const float x16 = x02 - x05; |
| const float x17 = x03 - x04; |
| const float x18 = x10 + x13; |
| const float x19 = x11 + x12; |
| const float x1a = x10 - x13; |
| const float x1b = x11 - x12; |
| const float x1c = 1.38703984532215f*x14 + 0.275899379282943f*x17; |
| const float x1d = 1.17587560241936f*x15 + 0.785694958387102f*x16; |
| const float x1e = -0.785694958387102f*x15 + 1.17587560241936f *x16; |
| const float x1f = 0.275899379282943f*x14 - 1.38703984532215f *x17; |
| const float x20 = 0.25f * (x1c - x1d); |
| const float x21 = 0.25f * (x1e - x1f); |
| const float x22 = 1.40740373752638f *x08 + 0.138617169199091f*x0f; |
| const float x23 = 1.35331800117435f *x09 + 0.410524527522357f*x0e; |
| const float x24 = 1.24722501298667f *x0a + 0.666655658477747f*x0d; |
| const float x25 = 1.09320186700176f *x0b + 0.897167586342636f*x0c; |
| const float x26 = -0.897167586342636f*x0b + 1.09320186700176f *x0c; |
| const float x27 = 0.666655658477747f*x0a - 1.24722501298667f *x0d; |
| const float x28 = -0.410524527522357f*x09 + 1.35331800117435f *x0e; |
| const float x29 = 0.138617169199091f*x08 - 1.40740373752638f *x0f; |
| const float x2a = x22 + x25; |
| const float x2b = x23 + x24; |
| const float x2c = x22 - x25; |
| const float x2d = x23 - x24; |
| const float x2e = 0.25f * (x2a - x2b); |
| const float x2f = 0.326640741219094f*x2c + 0.135299025036549f*x2d; |
| const float x30 = 0.135299025036549f*x2c - 0.326640741219094f*x2d; |
| const float x31 = x26 + x29; |
| const float x32 = x27 + x28; |
| const float x33 = x26 - x29; |
| const float x34 = x27 - x28; |
| const float x35 = 0.25f * (x31 - x32); |
| const float x36 = 0.326640741219094f*x33 + 0.135299025036549f*x34; |
| const float x37 = 0.135299025036549f*x33 - 0.326640741219094f*x34; |
| dst[ 0*dst_stridea] = 0.25f * (x18 + x19); |
| dst[ 1*dst_stridea] = 0.25f * (x2a + x2b); |
| dst[ 2*dst_stridea] = 0.25f * (x1c + x1d); |
| dst[ 3*dst_stridea] = 0.707106781186547f * (x2f - x37); |
| dst[ 4*dst_stridea] = 0.326640741219094f*x1a + 0.135299025036549f*x1b; |
| dst[ 5*dst_stridea] = 0.707106781186547f * (x2f + x37); |
| dst[ 6*dst_stridea] = 0.707106781186547f * (x20 - x21); |
| dst[ 7*dst_stridea] = 0.707106781186547f * (x2e + x35); |
| dst[ 8*dst_stridea] = 0.25f * (x18 - x19); |
| dst[ 9*dst_stridea] = 0.707106781186547f * (x2e - x35); |
| dst[10*dst_stridea] = 0.707106781186547f * (x20 + x21); |
| dst[11*dst_stridea] = 0.707106781186547f * (x30 - x36); |
| dst[12*dst_stridea] = 0.135299025036549f*x1a - 0.326640741219094f*x1b; |
| dst[13*dst_stridea] = 0.707106781186547f * (x30 + x36); |
| dst[14*dst_stridea] = 0.25f * (x1e + x1f); |
| dst[15*dst_stridea] = 0.25f * (x31 + x32); |
| dst += dst_strideb; |
| src += src_strideb; |
| } |
| } |
| |
| 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 < 16; i++) { |
| const float x00 = 1.4142135623731f *src[ 0*src_stridea]; |
| const float x01 = 1.40740373752638f *src[ 1*src_stridea] + 0.138617169199091f*src[15*src_stridea]; |
| const float x02 = 1.38703984532215f *src[ 2*src_stridea] + 0.275899379282943f*src[14*src_stridea]; |
| const float x03 = 1.35331800117435f *src[ 3*src_stridea] + 0.410524527522357f*src[13*src_stridea]; |
| const float x04 = 1.30656296487638f *src[ 4*src_stridea] + 0.541196100146197f*src[12*src_stridea]; |
| const float x05 = 1.24722501298667f *src[ 5*src_stridea] + 0.666655658477747f*src[11*src_stridea]; |
| const float x06 = 1.17587560241936f *src[ 6*src_stridea] + 0.785694958387102f*src[10*src_stridea]; |
| const float x07 = 1.09320186700176f *src[ 7*src_stridea] + 0.897167586342636f*src[ 9*src_stridea]; |
| const float x08 = 1.4142135623731f *src[ 8*src_stridea]; |
| const float x09 = -0.897167586342636f*src[ 7*src_stridea] + 1.09320186700176f*src[ 9*src_stridea]; |
| const float x0a = 0.785694958387102f*src[ 6*src_stridea] - 1.17587560241936f*src[10*src_stridea]; |
| const float x0b = -0.666655658477747f*src[ 5*src_stridea] + 1.24722501298667f*src[11*src_stridea]; |
| const float x0c = 0.541196100146197f*src[ 4*src_stridea] - 1.30656296487638f*src[12*src_stridea]; |
| const float x0d = -0.410524527522357f*src[ 3*src_stridea] + 1.35331800117435f*src[13*src_stridea]; |
| const float x0e = 0.275899379282943f*src[ 2*src_stridea] - 1.38703984532215f*src[14*src_stridea]; |
| const float x0f = -0.138617169199091f*src[ 1*src_stridea] + 1.40740373752638f*src[15*src_stridea]; |
| const float x12 = x00 + x08; |
| const float x13 = x01 + x07; |
| const float x14 = x02 + x06; |
| const float x15 = x03 + x05; |
| const float x16 = 1.4142135623731f*x04; |
| const float x17 = x00 - x08; |
| const float x18 = x01 - x07; |
| const float x19 = x02 - x06; |
| const float x1a = x03 - x05; |
| const float x1d = x12 + x16; |
| const float x1e = x13 + x15; |
| const float x1f = 1.4142135623731f*x14; |
| const float x20 = x12 - x16; |
| const float x21 = x13 - x15; |
| const float x22 = 0.25f * (x1d - x1f); |
| const float x23 = 0.25f * (x20 + x21); |
| const float x24 = 0.25f * (x20 - x21); |
| const float x25 = 1.4142135623731f*x17; |
| const float x26 = 1.30656296487638f*x18 + 0.541196100146197f*x1a; |
| const float x27 = 1.4142135623731f*x19; |
| const float x28 = -0.541196100146197f*x18 + 1.30656296487638f*x1a; |
| const float x29 = 0.176776695296637f * (x25 + x27) + 0.25f*x26; |
| const float x2a = 0.25f * (x25 - x27); |
| const float x2b = 0.176776695296637f * (x25 + x27) - 0.25f*x26; |
| const float x2c = 0.353553390593274f*x28; |
| const float x1b = 0.707106781186547f * (x2a - x2c); |
| const float x1c = 0.707106781186547f * (x2a + x2c); |
| const float x2d = 1.4142135623731f*x0c; |
| const float x2e = x0b + x0d; |
| const float x2f = x0a + x0e; |
| const float x30 = x09 + x0f; |
| const float x31 = x09 - x0f; |
| const float x32 = x0a - x0e; |
| const float x33 = x0b - x0d; |
| const float x37 = 1.4142135623731f*x2d; |
| const float x38 = 1.30656296487638f*x2e + 0.541196100146197f*x30; |
| const float x39 = 1.4142135623731f*x2f; |
| const float x3a = -0.541196100146197f*x2e + 1.30656296487638f*x30; |
| const float x3b = 0.176776695296637f * (x37 + x39) + 0.25f*x38; |
| const float x3c = 0.25f * (x37 - x39); |
| const float x3d = 0.176776695296637f * (x37 + x39) - 0.25f*x38; |
| const float x3e = 0.353553390593274f*x3a; |
| const float x34 = 0.707106781186547f * (x3c - x3e); |
| const float x35 = 0.707106781186547f * (x3c + x3e); |
| const float x3f = 1.4142135623731f*x32; |
| const float x40 = x31 + x33; |
| const float x41 = x31 - x33; |
| const float x42 = 0.25f * (x3f + x40); |
| const float x43 = 0.25f * (x3f - x40); |
| const float x44 = 0.353553390593274f*x41; |
| dst[ 0*dst_stridea] = (add ? dst[ 0*dst_stridea] : 0) + 0.176776695296637f * (x1d + x1f) + 0.25f*x1e; |
| dst[ 1*dst_stridea] = (add ? dst[ 1*dst_stridea] : 0) + 0.707106781186547f * (x29 + x3d); |
| dst[ 2*dst_stridea] = (add ? dst[ 2*dst_stridea] : 0) + 0.707106781186547f * (x29 - x3d); |
| dst[ 3*dst_stridea] = (add ? dst[ 3*dst_stridea] : 0) + 0.707106781186547f * (x23 - x43); |
| dst[ 4*dst_stridea] = (add ? dst[ 4*dst_stridea] : 0) + 0.707106781186547f * (x23 + x43); |
| dst[ 5*dst_stridea] = (add ? dst[ 5*dst_stridea] : 0) + 0.707106781186547f * (x1b - x35); |
| dst[ 6*dst_stridea] = (add ? dst[ 6*dst_stridea] : 0) + 0.707106781186547f * (x1b + x35); |
| dst[ 7*dst_stridea] = (add ? dst[ 7*dst_stridea] : 0) + 0.707106781186547f * (x22 + x44); |
| dst[ 8*dst_stridea] = (add ? dst[ 8*dst_stridea] : 0) + 0.707106781186547f * (x22 - x44); |
| dst[ 9*dst_stridea] = (add ? dst[ 9*dst_stridea] : 0) + 0.707106781186547f * (x1c + x34); |
| dst[10*dst_stridea] = (add ? dst[10*dst_stridea] : 0) + 0.707106781186547f * (x1c - x34); |
| dst[11*dst_stridea] = (add ? dst[11*dst_stridea] : 0) + 0.707106781186547f * (x24 + x42); |
| dst[12*dst_stridea] = (add ? dst[12*dst_stridea] : 0) + 0.707106781186547f * (x24 - x42); |
| dst[13*dst_stridea] = (add ? dst[13*dst_stridea] : 0) + 0.707106781186547f * (x2b - x3b); |
| dst[14*dst_stridea] = (add ? dst[14*dst_stridea] : 0) + 0.707106781186547f * (x2b + x3b); |
| dst[15*dst_stridea] = (add ? dst[15*dst_stridea] : 0) + 0.176776695296637f * (x1d + x1f) - 0.25f*x1e; |
| dst += dst_strideb; |
| src += src_strideb; |
| } |
| } |
| |
| #define DEF_FILTER_FREQ_FUNCS(bsize) \ |
| static av_always_inline void filter_freq_##bsize(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 */ \ |
| fdct##bsize##_1d(tmp_block1, src, 1, bsize, 1, src_linesize); \ |
| fdct##bsize##_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] = fabsf(*b); \ |
| *b *= av_expr_eval(expr, var_values, NULL); \ |
| } else { \ |
| if (fabsf(*b) < sigma_th) \ |
| *b = 0; \ |
| } \ |
| } \ |
| \ |
| /* inverse DCT */ \ |
| idct##bsize##_1d(tmp_block1, tmp_block2, 1, bsize, 1, bsize, 0); \ |
| idct##bsize##_1d(dst, tmp_block1, dst_linesize, 1, bsize, 1, 1); \ |
| } \ |
| \ |
| static void filter_freq_sigma_##bsize(DCTdnoizContext *s, \ |
| const float *src, int src_linesize, \ |
| float *dst, int dst_linesize, int thread_id) \ |
| { \ |
| filter_freq_##bsize(src, src_linesize, dst, dst_linesize, NULL, NULL, s->th); \ |
| } \ |
| \ |
| static void filter_freq_expr_##bsize(DCTdnoizContext *s, \ |
| const float *src, int src_linesize, \ |
| float *dst, int dst_linesize, int thread_id) \ |
| { \ |
| filter_freq_##bsize(src, src_linesize, dst, dst_linesize, \ |
| s->expr[thread_id], s->var_values[thread_id], 0); \ |
| } |
| |
| DEF_FILTER_FREQ_FUNCS(8) |
| DEF_FILTER_FREQ_FUNCS(16) |
| |
| #define DCT3X3_0_0 0.5773502691896258f /* 1/sqrt(3) */ |
| #define DCT3X3_0_1 0.5773502691896258f /* 1/sqrt(3) */ |
| #define DCT3X3_0_2 0.5773502691896258f /* 1/sqrt(3) */ |
| #define DCT3X3_1_0 0.7071067811865475f /* 1/sqrt(2) */ |
| #define DCT3X3_1_2 -0.7071067811865475f /* -1/sqrt(2) */ |
| #define DCT3X3_2_0 0.4082482904638631f /* 1/sqrt(6) */ |
| #define DCT3X3_2_1 -0.8164965809277261f /* -2/sqrt(6) */ |
| #define DCT3X3_2_2 0.4082482904638631f /* 1/sqrt(6) */ |
| |
| static av_always_inline void color_decorrelation(float **dst, int dst_linesize, |
| const uint8_t **src, int src_linesize, |
| int w, int h, |
| int r, int g, int b) |
| { |
| int x, y; |
| float *dstp_r = dst[0]; |
| float *dstp_g = dst[1]; |
| float *dstp_b = dst[2]; |
| const uint8_t *srcp = src[0]; |
| |
| for (y = 0; y < h; y++) { |
| for (x = 0; x < w; x++) { |
| dstp_r[x] = srcp[r] * DCT3X3_0_0 + srcp[g] * DCT3X3_0_1 + srcp[b] * DCT3X3_0_2; |
| dstp_g[x] = srcp[r] * DCT3X3_1_0 + srcp[b] * DCT3X3_1_2; |
| dstp_b[x] = srcp[r] * DCT3X3_2_0 + srcp[g] * DCT3X3_2_1 + srcp[b] * DCT3X3_2_2; |
| srcp += 3; |
| } |
| srcp += src_linesize - w * 3; |
| dstp_r += dst_linesize; |
| dstp_g += dst_linesize; |
| dstp_b += dst_linesize; |
| } |
| } |
| |
| static av_always_inline void color_correlation(uint8_t **dst, int dst_linesize, |
| float **src, int src_linesize, |
| int w, int h, |
| int r, int g, int b) |
| { |
| int x, y; |
| const float *src_r = src[0]; |
| const float *src_g = src[1]; |
| const float *src_b = src[2]; |
| uint8_t *dstp = dst[0]; |
| |
| for (y = 0; y < h; y++) { |
| for (x = 0; x < w; x++) { |
| dstp[r] = av_clip_uint8(src_r[x] * DCT3X3_0_0 + src_g[x] * DCT3X3_1_0 + src_b[x] * DCT3X3_2_0); |
| dstp[g] = av_clip_uint8(src_r[x] * DCT3X3_0_1 + src_b[x] * DCT3X3_2_1); |
| dstp[b] = av_clip_uint8(src_r[x] * DCT3X3_0_2 + src_g[x] * DCT3X3_1_2 + src_b[x] * DCT3X3_2_2); |
| dstp += 3; |
| } |
| dstp += dst_linesize - w * 3; |
| src_r += src_linesize; |
| src_g += src_linesize; |
| src_b += src_linesize; |
| } |
| } |
| |
| #define DECLARE_COLOR_FUNCS(name, r, g, b) \ |
| static void color_decorrelation_##name(float **dst, int dst_linesize, \ |
| const uint8_t **src, int src_linesize, \ |
| int w, int h) \ |
| { \ |
| color_decorrelation(dst, dst_linesize, src, src_linesize, w, h, r, g, b); \ |
| } \ |
| \ |
| static void color_correlation_##name(uint8_t **dst, int dst_linesize, \ |
| float **src, int src_linesize, \ |
| int w, int h) \ |
| { \ |
| color_correlation(dst, dst_linesize, src, src_linesize, w, h, r, g, b); \ |
| } |
| |
| DECLARE_COLOR_FUNCS(rgb, 0, 1, 2) |
| DECLARE_COLOR_FUNCS(bgr, 2, 1, 0) |
| |
| static av_always_inline void color_decorrelation_gbrp(float **dst, int dst_linesize, |
| const uint8_t **src, int src_linesize, |
| int w, int h) |
| { |
| int x, y; |
| float *dstp_r = dst[0]; |
| float *dstp_g = dst[1]; |
| float *dstp_b = dst[2]; |
| const uint8_t *srcp_r = src[2]; |
| const uint8_t *srcp_g = src[0]; |
| const uint8_t *srcp_b = src[1]; |
| |
| for (y = 0; y < h; y++) { |
| for (x = 0; x < w; x++) { |
| dstp_r[x] = srcp_r[x] * DCT3X3_0_0 + srcp_g[x] * DCT3X3_0_1 + srcp_b[x] * DCT3X3_0_2; |
| dstp_g[x] = srcp_r[x] * DCT3X3_1_0 + srcp_b[x] * DCT3X3_1_2; |
| dstp_b[x] = srcp_r[x] * DCT3X3_2_0 + srcp_g[x] * DCT3X3_2_1 + srcp_b[x] * DCT3X3_2_2; |
| } |
| srcp_r += src_linesize; |
| srcp_g += src_linesize; |
| srcp_b += src_linesize; |
| dstp_r += dst_linesize; |
| dstp_g += dst_linesize; |
| dstp_b += dst_linesize; |
| } |
| } |
| |
| static av_always_inline void color_correlation_gbrp(uint8_t **dst, int dst_linesize, |
| float **src, int src_linesize, |
| int w, int h) |
| { |
| int x, y; |
| const float *src_r = src[0]; |
| const float *src_g = src[1]; |
| const float *src_b = src[2]; |
| uint8_t *dstp_r = dst[2]; |
| uint8_t *dstp_g = dst[0]; |
| uint8_t *dstp_b = dst[1]; |
| |
| for (y = 0; y < h; y++) { |
| for (x = 0; x < w; x++) { |
| dstp_r[x] = av_clip_uint8(src_r[x] * DCT3X3_0_0 + src_g[x] * DCT3X3_1_0 + src_b[x] * DCT3X3_2_0); |
| dstp_g[x] = av_clip_uint8(src_r[x] * DCT3X3_0_1 + src_b[x] * DCT3X3_2_1); |
| dstp_b[x] = av_clip_uint8(src_r[x] * DCT3X3_0_2 + src_g[x] * DCT3X3_1_2 + src_b[x] * DCT3X3_2_2); |
| } |
| dstp_r += dst_linesize; |
| dstp_g += dst_linesize; |
| dstp_b += dst_linesize; |
| src_r += src_linesize; |
| src_g += src_linesize; |
| src_b += src_linesize; |
| } |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| DCTdnoizContext *s = ctx->priv; |
| int i, x, y, bx, by, linesize, *iweights, max_slice_h, slice_h; |
| const int bsize = 1 << s->n; |
| |
| switch (inlink->format) { |
| case AV_PIX_FMT_BGR24: |
| s->color_decorrelation = color_decorrelation_bgr; |
| s->color_correlation = color_correlation_bgr; |
| break; |
| case AV_PIX_FMT_RGB24: |
| s->color_decorrelation = color_decorrelation_rgb; |
| s->color_correlation = color_correlation_rgb; |
| break; |
| case AV_PIX_FMT_GBRP: |
| s->color_decorrelation = color_decorrelation_gbrp; |
| s->color_correlation = color_correlation_gbrp; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| s->pr_width = inlink->w - (inlink->w - bsize) % s->step; |
| s->pr_height = inlink->h - (inlink->h - bsize) % s->step; |
| if (s->pr_width != inlink->w) |
| av_log(ctx, AV_LOG_WARNING, "The last %d horizontal pixels won't be denoised\n", |
| inlink->w - s->pr_width); |
| if (s->pr_height != inlink->h) |
| av_log(ctx, AV_LOG_WARNING, "The last %d vertical pixels won't be denoised\n", |
| inlink->h - s->pr_height); |
| |
| max_slice_h = s->pr_height / ((s->bsize - 1) * 2); |
| s->nb_threads = FFMIN3(MAX_THREADS, ff_filter_get_nb_threads(ctx), max_slice_h); |
| av_log(ctx, AV_LOG_DEBUG, "threads: [max=%d hmax=%d user=%d] => %d\n", |
| MAX_THREADS, max_slice_h, ff_filter_get_nb_threads(ctx), s->nb_threads); |
| |
| s->p_linesize = linesize = FFALIGN(s->pr_width, 32); |
| for (i = 0; i < 2; i++) { |
| s->cbuf[i][0] = av_malloc_array(linesize * s->pr_height, sizeof(*s->cbuf[i][0])); |
| s->cbuf[i][1] = av_malloc_array(linesize * s->pr_height, sizeof(*s->cbuf[i][1])); |
| s->cbuf[i][2] = av_malloc_array(linesize * s->pr_height, sizeof(*s->cbuf[i][2])); |
| if (!s->cbuf[i][0] || !s->cbuf[i][1] || !s->cbuf[i][2]) |
| return AVERROR(ENOMEM); |
| } |
| |
| /* eval expressions are probably not thread safe when the eval internal |
| * state can be changed (typically through load & store operations) */ |
| if (s->expr_str) { |
| for (i = 0; i < s->nb_threads; i++) { |
| int ret = av_expr_parse(&s->expr[i], s->expr_str, var_names, |
| NULL, NULL, NULL, NULL, 0, ctx); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| |
| /* each slice will need to (pre & re)process the top and bottom block of |
| * the previous one in in addition to its processing area. This is because |
| * each pixel is averaged by all the surrounding blocks */ |
| slice_h = (int)ceilf(s->pr_height / (float)s->nb_threads) + (s->bsize - 1) * 2; |
| for (i = 0; i < s->nb_threads; i++) { |
| s->slices[i] = av_malloc_array(linesize, slice_h * sizeof(*s->slices[i])); |
| if (!s->slices[i]) |
| return AVERROR(ENOMEM); |
| } |
| |
| s->weights = av_malloc(s->pr_height * linesize * sizeof(*s->weights)); |
| if (!s->weights) |
| return AVERROR(ENOMEM); |
| iweights = av_calloc(s->pr_height, linesize * sizeof(*iweights)); |
| if (!iweights) |
| return AVERROR(ENOMEM); |
| for (y = 0; y < s->pr_height - bsize + 1; y += s->step) |
| for (x = 0; x < s->pr_width - bsize + 1; x += s->step) |
| for (by = 0; by < bsize; by++) |
| for (bx = 0; bx < bsize; bx++) |
| iweights[(y + by)*linesize + x + bx]++; |
| for (y = 0; y < s->pr_height; y++) |
| for (x = 0; x < s->pr_width; x++) |
| s->weights[y*linesize + x] = 1. / iweights[y*linesize + x]; |
| av_free(iweights); |
| |
| return 0; |
| } |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| DCTdnoizContext *s = ctx->priv; |
| |
| s->bsize = 1 << s->n; |
| if (s->overlap == -1) |
| s->overlap = s->bsize - 1; |
| |
| if (s->overlap > s->bsize - 1) { |
| av_log(s, AV_LOG_ERROR, "Overlap value can not except %d " |
| "with a block size of %dx%d\n", |
| s->bsize - 1, s->bsize, s->bsize); |
| return AVERROR(EINVAL); |
| } |
| |
| if (s->expr_str) { |
| switch (s->n) { |
| case 3: s->filter_freq_func = filter_freq_expr_8; break; |
| case 4: s->filter_freq_func = filter_freq_expr_16; break; |
| default: av_assert0(0); |
| } |
| } else { |
| switch (s->n) { |
| case 3: s->filter_freq_func = filter_freq_sigma_8; break; |
| case 4: s->filter_freq_func = filter_freq_sigma_16; break; |
| default: av_assert0(0); |
| } |
| } |
| |
| s->th = s->sigma * 3.; |
| s->step = s->bsize - s->overlap; |
| return 0; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24, |
| AV_PIX_FMT_GBRP, |
| AV_PIX_FMT_NONE |
| }; |
| AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
| if (!fmts_list) |
| return AVERROR(ENOMEM); |
| return ff_set_common_formats(ctx, fmts_list); |
| } |
| |
| typedef struct ThreadData { |
| float *src, *dst; |
| } ThreadData; |
| |
| static int filter_slice(AVFilterContext *ctx, |
| void *arg, int jobnr, int nb_jobs) |
| { |
| int x, y; |
| DCTdnoizContext *s = ctx->priv; |
| const ThreadData *td = arg; |
| const int w = s->pr_width; |
| const int h = s->pr_height; |
| const int slice_start = (h * jobnr ) / nb_jobs; |
| const int slice_end = (h * (jobnr+1)) / nb_jobs; |
| const int slice_start_ctx = FFMAX(slice_start - s->bsize + 1, 0); |
| const int slice_end_ctx = FFMIN(slice_end, h - s->bsize + 1); |
| const int slice_h = slice_end_ctx - slice_start_ctx; |
| const int src_linesize = s->p_linesize; |
| const int dst_linesize = s->p_linesize; |
| const int slice_linesize = s->p_linesize; |
| float *dst; |
| const float *src = td->src + slice_start_ctx * src_linesize; |
| const float *weights = s->weights + slice_start * dst_linesize; |
| float *slice = s->slices[jobnr]; |
| |
| // reset block sums |
| memset(slice, 0, (slice_h + s->bsize - 1) * dst_linesize * sizeof(*slice)); |
| |
| // block dct sums |
| for (y = 0; y < slice_h; y += s->step) { |
| for (x = 0; x < w - s->bsize + 1; x += s->step) |
| s->filter_freq_func(s, src + x, src_linesize, |
| slice + x, slice_linesize, |
| jobnr); |
| src += s->step * src_linesize; |
| slice += s->step * slice_linesize; |
| } |
| |
| // average blocks |
| slice = s->slices[jobnr] + (slice_start - slice_start_ctx) * slice_linesize; |
| dst = td->dst + slice_start * dst_linesize; |
| for (y = slice_start; y < slice_end; y++) { |
| for (x = 0; x < w; x++) |
| dst[x] = slice[x] * weights[x]; |
| slice += slice_linesize; |
| dst += dst_linesize; |
| weights += dst_linesize; |
| } |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| DCTdnoizContext *s = ctx->priv; |
| AVFilterLink *outlink = inlink->dst->outputs[0]; |
| int direct, plane; |
| AVFrame *out; |
| |
| if (av_frame_is_writable(in)) { |
| direct = 1; |
| out = in; |
| } else { |
| direct = 0; |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| av_frame_copy_props(out, in); |
| } |
| |
| s->color_decorrelation(s->cbuf[0], s->p_linesize, |
| (const uint8_t **)in->data, in->linesize[0], |
| s->pr_width, s->pr_height); |
| for (plane = 0; plane < 3; plane++) { |
| ThreadData td = { |
| .src = s->cbuf[0][plane], |
| .dst = s->cbuf[1][plane], |
| }; |
| ctx->internal->execute(ctx, filter_slice, &td, NULL, s->nb_threads); |
| } |
| s->color_correlation(out->data, out->linesize[0], |
| s->cbuf[1], s->p_linesize, |
| s->pr_width, s->pr_height); |
| |
| if (!direct) { |
| int y; |
| uint8_t *dst = out->data[0]; |
| const uint8_t *src = in->data[0]; |
| const int dst_linesize = out->linesize[0]; |
| const int src_linesize = in->linesize[0]; |
| const int hpad = (inlink->w - s->pr_width) * 3; |
| const int vpad = (inlink->h - s->pr_height); |
| |
| if (hpad) { |
| uint8_t *dstp = dst + s->pr_width * 3; |
| const uint8_t *srcp = src + s->pr_width * 3; |
| |
| for (y = 0; y < s->pr_height; y++) { |
| memcpy(dstp, srcp, hpad); |
| dstp += dst_linesize; |
| srcp += src_linesize; |
| } |
| } |
| if (vpad) { |
| uint8_t *dstp = dst + s->pr_height * dst_linesize; |
| const uint8_t *srcp = src + s->pr_height * src_linesize; |
| |
| for (y = 0; y < vpad; y++) { |
| memcpy(dstp, srcp, inlink->w * 3); |
| dstp += dst_linesize; |
| srcp += src_linesize; |
| } |
| } |
| |
| av_frame_free(&in); |
| } |
| |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| int i; |
| DCTdnoizContext *s = ctx->priv; |
| |
| av_freep(&s->weights); |
| for (i = 0; i < 2; i++) { |
| av_freep(&s->cbuf[i][0]); |
| av_freep(&s->cbuf[i][1]); |
| av_freep(&s->cbuf[i][2]); |
| } |
| for (i = 0; i < s->nb_threads; i++) { |
| av_freep(&s->slices[i]); |
| av_expr_free(s->expr[i]); |
| } |
| } |
| |
| static const AVFilterPad dctdnoiz_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| .config_props = config_input, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad dctdnoiz_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_dctdnoiz = { |
| .name = "dctdnoiz", |
| .description = NULL_IF_CONFIG_SMALL("Denoise frames using 2D DCT."), |
| .priv_size = sizeof(DCTdnoizContext), |
| .init = init, |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .inputs = dctdnoiz_inputs, |
| .outputs = dctdnoiz_outputs, |
| .priv_class = &dctdnoiz_class, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, |
| }; |