[FFmpeg-devel] [PATCH] lavfi: port ow from libmpcodecs.
Clément Bœsch
ubitux at gmail.com
Fri May 10 22:10:15 CEST 2013
TODO: Changelog & minor bump
---
Feel free to bikeshed for a new name.
mp=ow will be dropped in the same time.
---
doc/filters.texi | 26 ++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_ow.c | 344 +++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 372 insertions(+)
create mode 100644 libavfilter/vf_ow.c
diff --git a/doc/filters.texi b/doc/filters.texi
index fe38b7f..8b9fb4a 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -5103,6 +5103,32 @@ testsrc=s=100x100, split=4 [in0][in1][in2][in3];
@end itemize
+ at section ow
+
+Overcomplete Wavelet denoiser.
+
+The filter accepts the following options:
+
+ at table @option
+ at item depth
+Set depth.
+
+Larger depth values will denoise lower frequency components more, but
+slow down filtering
+
+Default is @code{8}.
+
+ at item luma_strength
+Set luma strength.
+
+Default is @code{1.0}
+
+ at item chroma_strength
+Set chroma strength.
+
+Default is @code{1.0}
+ at end table
+
@section pad
Add paddings to the input image, and place the original input at the
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 73a24dd..f6daed1 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -154,6 +154,7 @@ OBJS-$(CONFIG_NULL_FILTER) += vf_null.o
OBJS-$(CONFIG_OCV_FILTER) += vf_libopencv.o
OBJS-$(CONFIG_OPENCL) += deshake_opencl.o unsharp_opencl.o
OBJS-$(CONFIG_OVERLAY_FILTER) += vf_overlay.o
+OBJS-$(CONFIG_OW_FILTER) += vf_ow.o
OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o
OBJS-$(CONFIG_PERMS_FILTER) += f_perms.o
OBJS-$(CONFIG_PIXDESCTEST_FILTER) += vf_pixdesctest.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index b8f273d..8986547 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -151,6 +151,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(NULL, null, vf);
REGISTER_FILTER(OCV, ocv, vf);
REGISTER_FILTER(OVERLAY, overlay, vf);
+ REGISTER_FILTER(OW, ow, vf);
REGISTER_FILTER(PAD, pad, vf);
REGISTER_FILTER(PERMS, perms, vf);
REGISTER_FILTER(PIXDESCTEST, pixdesctest, vf);
diff --git a/libavfilter/vf_ow.c b/libavfilter/vf_ow.c
new file mode 100644
index 0000000..97c386a
--- /dev/null
+++ b/libavfilter/vf_ow.c
@@ -0,0 +1,344 @@
+/*
+ * Copyright (C) 2007 Michael Niedermayer <michaelni at gmx.at>
+ * Copyright (c) 2013 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
+ */
+
+/**
+ * @todo try to change to int
+ * @todo try lifting based implementation
+ * @todo optimize optimize optimize
+ * @todo hard tresholding
+ * @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;
+} OWContext;
+
+#define OFFSET(x) offsetof(OWContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption ow_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(ow);
+
+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 },
+};
+
+#define SQRT2 1.41421356237
+
+static const double coeff[2][5] = {
+ {
+ 0.6029490182363579 * SQRT2,
+ 0.2668641184428723 * SQRT2,
+ -0.07822326652898785 * SQRT2,
+ -0.01686411844287495 * SQRT2,
+ 0.02674875741080976 * SQRT2,
+ },{
+ 1.115087052456994 / SQRT2,
+ -0.5912717631142470 / SQRT2,
+ -0.05754352622849957 / SQRT2,
+ 0.09127176311424948 / SQRT2,
+ }
+};
+
+static const double icoeff[2][5]={
+ {
+ 1.115087052456994 / SQRT2,
+ 0.5912717631142470 / SQRT2,
+ -0.05754352622849957 / SQRT2,
+ -0.09127176311424948 / SQRT2,
+ },{
+ 0.6029490182363579 * SQRT2,
+ -0.2668641184428723 * SQRT2,
+ -0.07822326652898785 * SQRT2,
+ 0.01686411844287495 * SQRT2,
+ 0.02674875741080976 * 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(OWContext *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;
+ OWContext *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;
+ OWContext *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(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;
+ OWContext *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 ow_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad ow_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter avfilter_vf_ow = {
+ .name = "ow",
+ .description = NULL_IF_CONFIG_SMALL("Denoise using wavelets."),
+ .priv_size = sizeof(OWContext),
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = ow_inputs,
+ .outputs = ow_outputs,
+ .priv_class = &ow_class,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE,
+};
--
1.8.2.2
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