diff options
Diffstat (limited to 'libavfilter/vf_owdenoise.c')
| -rw-r--r-- | libavfilter/vf_owdenoise.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/libavfilter/vf_owdenoise.c b/libavfilter/vf_owdenoise.c new file mode 100644 index 0000000..5b47f76 --- /dev/null +++ b/libavfilter/vf_owdenoise.c @@ -0,0 +1,342 @@ +/* + * Copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at> + * Copyright (c) 2013 Clément Bœsch <u pkh me> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 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 General Public License for more details. + * + * You should have received a copy of the GNU 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. + */ + +/** + * @todo try to change to int + * @todo try lifting based implementation + * @todo optimize optimize optimize + * @todo hard thresholding + * @todo use QP to decide filter strength + * @todo wavelet normalization / least squares optimal signal vs. noise thresholds + */ + +#include "libavutil/imgutils.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "avfilter.h" +#include "internal.h" + +typedef struct { + const AVClass *class; + double luma_strength; + double chroma_strength; + int depth; + float *plane[16+1][4]; + int linesize; + int hsub, vsub; +} OWDenoiseContext; + +#define OFFSET(x) offsetof(OWDenoiseContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM +static const AVOption owdenoise_options[] = { + { "depth", "set depth", OFFSET(depth), AV_OPT_TYPE_INT, {.i64 = 8}, 8, 16, FLAGS }, + { "luma_strength", "set luma strength", OFFSET(luma_strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0, 1000, FLAGS }, + { "ls", "set luma strength", OFFSET(luma_strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0, 1000, FLAGS }, + { "chroma_strength", "set chroma strength", OFFSET(chroma_strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0, 1000, FLAGS }, + { "cs", "set chroma strength", OFFSET(chroma_strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0, 1000, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(owdenoise); + +DECLARE_ALIGNED(8, static const uint8_t, dither)[8][8] = { + { 0, 48, 12, 60, 3, 51, 15, 63 }, + { 32, 16, 44, 28, 35, 19, 47, 31 }, + { 8, 56, 4, 52, 11, 59, 7, 55 }, + { 40, 24, 36, 20, 43, 27, 39, 23 }, + { 2, 50, 14, 62, 1, 49, 13, 61 }, + { 34, 18, 46, 30, 33, 17, 45, 29 }, + { 10, 58, 6, 54, 9, 57, 5, 53 }, + { 42, 26, 38, 22, 41, 25, 37, 21 }, +}; + +static const double coeff[2][5] = { + { + 0.6029490182363579 * M_SQRT2, + 0.2668641184428723 * M_SQRT2, + -0.07822326652898785 * M_SQRT2, + -0.01686411844287495 * M_SQRT2, + 0.02674875741080976 * M_SQRT2, + },{ + 1.115087052456994 / M_SQRT2, + -0.5912717631142470 / M_SQRT2, + -0.05754352622849957 / M_SQRT2, + 0.09127176311424948 / M_SQRT2, + } +}; + +static const double icoeff[2][5] = { + { + 1.115087052456994 / M_SQRT2, + 0.5912717631142470 / M_SQRT2, + -0.05754352622849957 / M_SQRT2, + -0.09127176311424948 / M_SQRT2, + },{ + 0.6029490182363579 * M_SQRT2, + -0.2668641184428723 * M_SQRT2, + -0.07822326652898785 * M_SQRT2, + 0.01686411844287495 * M_SQRT2, + 0.02674875741080976 * M_SQRT2, + } +}; + +static inline int mirror(int x, int w) +{ + while ((unsigned)x > (unsigned)w) { + x = -x; + if (x < 0) + x += 2 * w; + } + return x; +} + +static inline void decompose(float *dst_l, float *dst_h, const float *src, + int linesize, int w) +{ + int x, i; + for (x = 0; x < w; x++) { + double sum_l = src[x * linesize] * coeff[0][0]; + double sum_h = src[x * linesize] * coeff[1][0]; + for (i = 1; i <= 4; i++) { + const double s = src[mirror(x - i, w - 1) * linesize] + + src[mirror(x + i, w - 1) * linesize]; + + sum_l += coeff[0][i] * s; + sum_h += coeff[1][i] * s; + } + dst_l[x * linesize] = sum_l; + dst_h[x * linesize] = sum_h; + } +} + +static inline void compose(float *dst, const float *src_l, const float *src_h, + int linesize, int w) +{ + int x, i; + for (x = 0; x < w; x++) { + double sum_l = src_l[x * linesize] * icoeff[0][0]; + double sum_h = src_h[x * linesize] * icoeff[1][0]; + for (i = 1; i <= 4; i++) { + const int x0 = mirror(x - i, w - 1) * linesize; + const int x1 = mirror(x + i, w - 1) * linesize; + + sum_l += icoeff[0][i] * (src_l[x0] + src_l[x1]); + sum_h += icoeff[1][i] * (src_h[x0] + src_h[x1]); + } + dst[x * linesize] = (sum_l + sum_h) * 0.5; + } +} + +static inline void decompose2D(float *dst_l, float *dst_h, const float *src, + int xlinesize, int ylinesize, + int step, int w, int h) +{ + int y, x; + for (y = 0; y < h; y++) + for (x = 0; x < step; x++) + decompose(dst_l + ylinesize*y + xlinesize*x, + dst_h + ylinesize*y + xlinesize*x, + src + ylinesize*y + xlinesize*x, + step * xlinesize, (w - x + step - 1) / step); +} + +static inline void compose2D(float *dst, const float *src_l, const float *src_h, + int xlinesize, int ylinesize, + int step, int w, int h) +{ + int y, x; + for (y = 0; y < h; y++) + for (x = 0; x < step; x++) + compose(dst + ylinesize*y + xlinesize*x, + src_l + ylinesize*y + xlinesize*x, + src_h + ylinesize*y + xlinesize*x, + step * xlinesize, (w - x + step - 1) / step); +} + +static void decompose2D2(float *dst[4], float *src, float *temp[2], + int linesize, int step, int w, int h) +{ + decompose2D(temp[0], temp[1], src, 1, linesize, step, w, h); + decompose2D( dst[0], dst[1], temp[0], linesize, 1, step, h, w); + decompose2D( dst[2], dst[3], temp[1], linesize, 1, step, h, w); +} + +static void compose2D2(float *dst, float *src[4], float *temp[2], + int linesize, int step, int w, int h) +{ + compose2D(temp[0], src[0], src[1], linesize, 1, step, h, w); + compose2D(temp[1], src[2], src[3], linesize, 1, step, h, w); + compose2D(dst, temp[0], temp[1], 1, linesize, step, w, h); +} + +static void filter(OWDenoiseContext *s, + uint8_t *dst, int dst_linesize, + const uint8_t *src, int src_linesize, + int width, int height, double strength) +{ + int x, y, i, j, depth = s->depth; + + while (1<<depth > width || 1<<depth > height) + depth--; + + for (y = 0; y < height; y++) + for(x = 0; x < width; x++) + s->plane[0][0][y*s->linesize + x] = src[y*src_linesize + x]; + + for (i = 0; i < depth; i++) + decompose2D2(s->plane[i + 1], s->plane[i][0], s->plane[0] + 1, s->linesize, 1<<i, width, height); + + for (i = 0; i < depth; i++) { + for (j = 1; j < 4; j++) { + for (y = 0; y < height; y++) { + for (x = 0; x < width; x++) { + double v = s->plane[i + 1][j][y*s->linesize + x]; + if (v > strength) v -= strength; + else if (v < -strength) v += strength; + else v = 0; + s->plane[i + 1][j][x + y*s->linesize] = v; + } + } + } + } + for (i = depth-1; i >= 0; i--) + compose2D2(s->plane[i][0], s->plane[i + 1], s->plane[0] + 1, s->linesize, 1<<i, width, height); + + for (y = 0; y < height; y++) { + for (x = 0; x < width; x++) { + i = s->plane[0][0][y*s->linesize + x] + dither[x&7][y&7]*(1.0/64) + 1.0/128; // yes the rounding is insane but optimal :) + if ((unsigned)i > 255U) i = ~(i >> 31); + dst[y*dst_linesize + x] = i; + } + } +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + int direct = 0; + AVFilterContext *ctx = inlink->dst; + OWDenoiseContext *s = ctx->priv; + AVFilterLink *outlink = ctx->outputs[0]; + AVFrame *out; + const int cw = FF_CEIL_RSHIFT(inlink->w, s->hsub); + const int ch = FF_CEIL_RSHIFT(inlink->h, s->vsub); + + if (av_frame_is_writable(in)) { + direct = 1; + out = in; + } else { + 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); + } + + filter(s, out->data[0], out->linesize[0], in->data[0], in->linesize[0], inlink->w, inlink->h, s->luma_strength); + filter(s, out->data[1], out->linesize[1], in->data[1], in->linesize[1], cw, ch, s->chroma_strength); + filter(s, out->data[2], out->linesize[2], in->data[2], in->linesize[2], cw, ch, s->chroma_strength); + + if (!direct) { + if (in->data[3]) + av_image_copy_plane(out->data[3], out->linesize[3], + in ->data[3], in ->linesize[3], + inlink->w, inlink->h); + av_frame_free(&in); + } + + return ff_filter_frame(outlink, out); +} + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat pix_fmts[] = { + AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, + AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, + AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, + AV_PIX_FMT_YUVA420P, + AV_PIX_FMT_NONE + }; + ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); + return 0; +} + +static int config_input(AVFilterLink *inlink) +{ + int i, j; + OWDenoiseContext *s = inlink->dst->priv; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + const int h = FFALIGN(inlink->h, 16); + + s->hsub = desc->log2_chroma_w; + s->vsub = desc->log2_chroma_h; + + s->linesize = FFALIGN(inlink->w, 16); + for (j = 0; j < 4; j++) { + for (i = 0; i <= s->depth; i++) { + s->plane[i][j] = av_malloc_array(s->linesize, h * sizeof(s->plane[0][0][0])); + if (!s->plane[i][j]) + return AVERROR(ENOMEM); + } + } + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + int i, j; + OWDenoiseContext *s = ctx->priv; + + for (j = 0; j < 4; j++) + for (i = 0; i <= s->depth; i++) + av_freep(&s->plane[i][j]); +} + +static const AVFilterPad owdenoise_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad owdenoise_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_owdenoise = { + .name = "owdenoise", + .description = NULL_IF_CONFIG_SMALL("Denoise using wavelets."), + .priv_size = sizeof(OWDenoiseContext), + .uninit = uninit, + .query_formats = query_formats, + .inputs = owdenoise_inputs, + .outputs = owdenoise_outputs, + .priv_class = &owdenoise_class, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, +}; |
