[FFmpeg-cvslog] r22813 - in trunk: doc/libavfilter.texi libavfilter/Makefile libavfilter/allfilters.c libavfilter/vf_unsharp.c
koorogi
subversion
Wed Apr 7 03:05:24 CEST 2010
Author: koorogi
Date: Wed Apr 7 03:05:24 2010
New Revision: 22813
Log:
Add unsharp video filter.
Contributed by Daniel G. Taylor (dan/at/programmer-art/dot/org)
Added:
trunk/libavfilter/vf_unsharp.c
Modified:
trunk/doc/libavfilter.texi
trunk/libavfilter/Makefile
trunk/libavfilter/allfilters.c
Modified: trunk/doc/libavfilter.texi
==============================================================================
--- trunk/doc/libavfilter.texi Wed Apr 7 00:31:59 2010 (r22812)
+++ trunk/doc/libavfilter.texi Wed Apr 7 03:05:24 2010 (r22813)
@@ -217,6 +217,59 @@ not specified it will use the default va
Adding this in the beginning of filter chains should make filtering
faster due to better use of the memory cache.
+ at section unsharp
+
+Sharpen or blur the input video. It accepts the following parameters:
+
+ at multitable @columnfractions .2 .5 .1 .1 .1
+ at headitem Name @tab Description @tab Min @tab Max @tab Default
+ at item @var{luma_msize_x}
+ at tab Luma matrix horizontal size
+ at tab 3
+ at tab 13
+ at tab 5
+ at item @var{luma_msize_y}
+ at tab Luma matrix vertical size
+ at tab 3
+ at tab 13
+ at tab 5
+ at item @var{luma_amount}
+ at tab Luma effect strength
+ at tab -2.0
+ at tab 5.0
+ at tab 1.0
+ at item @var{chroma_msize_x}
+ at tab Chroma matrix horizontal size
+ at tab 3
+ at tab 13
+ at tab 0
+ at item @var{chroma_msize_y}
+ at tab Chroma matrix vertical size
+ at tab 3
+ at tab 13
+ at tab 0
+ at item @var{chroma_amount}
+ at tab Chroma effect strength
+ at tab -2.0
+ at tab 5.0
+ at tab 0.0
+ at end multitable
+
+Negative values for the amount will blur the input video, while positive
+values will sharpen. All parameters are optional and default to the
+equivalent of the string '5:5:1.0:0:0:0.0'.
+
+ at example
+# Strong luma sharpen effect parameters
+unsharp=7:7:2.5
+
+# Strong blur of both luma and chroma parameters
+unsharp=7:7:-2:7:7:-2
+
+# Use the default values with @command{ffmpeg}
+./ffmpeg -i in.avi -vfilters "unsharp" out.mp4
+ at end example
+
@section vflip
Flip the input video vertically.
Modified: trunk/libavfilter/Makefile
==============================================================================
--- trunk/libavfilter/Makefile Wed Apr 7 00:31:59 2010 (r22812)
+++ trunk/libavfilter/Makefile Wed Apr 7 03:05:24 2010 (r22813)
@@ -22,6 +22,7 @@ OBJS-$(CONFIG_NULL_FILTER)
OBJS-$(CONFIG_PIXELASPECT_FILTER) += vf_aspect.o
OBJS-$(CONFIG_SCALE_FILTER) += vf_scale.o
OBJS-$(CONFIG_SLICIFY_FILTER) += vf_slicify.o
+OBJS-$(CONFIG_UNSHARP_FILTER) += vf_unsharp.o
OBJS-$(CONFIG_VFLIP_FILTER) += vf_vflip.o
OBJS-$(CONFIG_NULLSRC_FILTER) += vsrc_nullsrc.o
Modified: trunk/libavfilter/allfilters.c
==============================================================================
--- trunk/libavfilter/allfilters.c Wed Apr 7 00:31:59 2010 (r22812)
+++ trunk/libavfilter/allfilters.c Wed Apr 7 03:05:24 2010 (r22813)
@@ -42,6 +42,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (PIXELASPECT, pixelaspect, vf);
REGISTER_FILTER (SCALE, scale, vf);
REGISTER_FILTER (SLICIFY, slicify, vf);
+ REGISTER_FILTER (UNSHARP, unsharp, vf);
REGISTER_FILTER (VFLIP, vflip, vf);
REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
Added: trunk/libavfilter/vf_unsharp.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ trunk/libavfilter/vf_unsharp.c Wed Apr 7 03:05:24 2010 (r22813)
@@ -0,0 +1,236 @@
+/*
+ * Ported to FFmpeg from MPlayer libmpcodecs/unsharp.c
+ * Original copyright (C) 2002 Remi Guyomarch <rguyom at pobox.com>
+ * Port copyright (C) 2010 Daniel G. Taylor <dan at programmer-art.org>
+ * Relicensed to the LGPL with permission from Remi Guyomarch.
+ *
+ * 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
+ */
+
+/**
+ * @file libavfilter/vf_unsharp.c
+ * blur / sharpen filter
+ *
+ * This code is based on:
+ *
+ * An Efficient algorithm for Gaussian blur using finite-state machines
+ * Frederick M. Waltz and John W. V. Miller
+ *
+ * SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII
+ * Originally published Boston, Nov 98
+ *
+ * http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf
+ */
+
+#include "avfilter.h"
+#include "libavutil/common.h"
+#include "libavutil/mem.h"
+#include "libavutil/pixdesc.h"
+
+#define MIN_SIZE 3
+#define MAX_SIZE 13
+
+#define CHROMA_WIDTH(link) -((-link->w) >> av_pix_fmt_descriptors[link->format].log2_chroma_w)
+#define CHROMA_HEIGHT(link) -((-link->h) >> av_pix_fmt_descriptors[link->format].log2_chroma_h)
+
+typedef struct FilterParam {
+ int msize_x; ///< matrix width
+ int msize_y; ///< matrix height
+ int amount; ///< effect amount
+ int steps_x; ///< horizontal step count
+ int steps_y; ///< vertical step count
+ int scalebits; ///< bits to shift pixel
+ int32_t halfscale; ///< amount to add to pixel
+ uint32_t *sc[(MAX_SIZE * MAX_SIZE) - 1]; ///< finite state machine storage
+} FilterParam;
+
+typedef struct {
+ FilterParam luma; ///< luma parameters (width, height, amount)
+ FilterParam chroma; ///< chroma parameters (width, height, amount)
+} UnsharpContext;
+
+static void unsharpen(uint8_t *dst, uint8_t *src, int dst_stride, int src_stride, int width, int height, FilterParam *fp)
+{
+ uint32_t **sc = fp->sc;
+ uint32_t sr[(MAX_SIZE * MAX_SIZE) - 1], tmp1, tmp2;
+
+ int32_t res;
+ int x, y, z;
+
+ if (!fp->amount) {
+ if (dst_stride == src_stride)
+ memcpy(dst, src, src_stride * height);
+ else
+ for (y = 0; y < height; y++, dst += dst_stride, src += src_stride)
+ memcpy(dst, src, width);
+ return;
+ }
+
+ for (y = 0; y < 2 * fp->steps_y; y++)
+ memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * fp->steps_x));
+
+ for (y =- fp->steps_y; y < height + fp->steps_y; y++) {
+ memset(sr, 0, sizeof(sr[0]) * (2 * fp->steps_x - 1));
+ for (x =- fp->steps_x; x < width + fp->steps_x; x++) {
+ tmp1 = x <= 0 ? src[0] : x >= width ? src[width-1] : src[x];
+ for (z = 0; z < fp->steps_x * 2; z += 2) {
+ tmp2 = sr[z + 0] + tmp1; sr[z + 0] = tmp1;
+ tmp1 = sr[z + 1] + tmp2; sr[z + 1] = tmp2;
+ }
+ for (z = 0; z < fp->steps_y * 2; z += 2) {
+ tmp2 = sc[z + 0][x + fp->steps_x] + tmp1; sc[z + 0][x + fp->steps_x] = tmp1;
+ tmp1 = sc[z + 1][x + fp->steps_x] + tmp2; sc[z + 1][x + fp->steps_x] = tmp2;
+ }
+ if (x >= fp->steps_x && y >= fp->steps_y) {
+ uint8_t* srx = src - fp->steps_y * src_stride + x - fp->steps_x;
+ uint8_t* dsx = dst - fp->steps_y * dst_stride + x - fp->steps_x;
+
+ res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + fp->halfscale) >> fp->scalebits)) * fp->amount) >> 16);
+ *dsx = av_clip_uint8(res);
+ }
+ }
+ if (y >= 0) {
+ dst += dst_stride;
+ src += src_stride;
+ }
+ }
+}
+
+static void set_filter_param(FilterParam *fp, int msize_x, int msize_y, double amount)
+{
+ fp->msize_x = msize_x;
+ fp->msize_y = msize_y;
+ fp->amount = amount * 65536.0;
+
+ fp->steps_x = msize_x / 2;
+ fp->steps_y = msize_y / 2;
+ fp->scalebits = (fp->steps_x + fp->steps_y) * 2;
+ fp->halfscale = 1 << (fp->scalebits - 1);
+}
+
+static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+ UnsharpContext *unsharp = ctx->priv;
+ int lmsize_x = 5, cmsize_x = 0;
+ int lmsize_y = 5, cmsize_y = 0;
+ double lamount = 1.0f, camount = 0.0f;
+
+ if (args)
+ sscanf(args, "%d:%d:%lf:%d:%d:%lf", &lmsize_x, &lmsize_y, &lamount,
+ &cmsize_x, &cmsize_y, &camount);
+
+ set_filter_param(&unsharp->luma, lmsize_x, lmsize_y, lamount);
+ set_filter_param(&unsharp->chroma, cmsize_x, cmsize_y, camount);
+
+ return 0;
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ enum PixelFormat pix_fmts[] = {
+ PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_YUV410P,
+ PIX_FMT_YUV411P, PIX_FMT_YUV440P, PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P,
+ PIX_FMT_YUVJ444P, PIX_FMT_YUVJ440P, PIX_FMT_NONE
+ };
+
+ avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
+
+ return 0;
+}
+
+static void init_filter_param(AVFilterContext *ctx, FilterParam *fp, const char *effect_type, int width)
+{
+ int z;
+ const char *effect;
+
+ effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen";
+
+ av_log(ctx, AV_LOG_INFO, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n",
+ effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0);
+
+ for (z = 0; z < 2 * fp->steps_y; z++)
+ fp->sc[z] = av_malloc(sizeof(*(fp->sc[z])) * (width + 2 * fp->steps_x));
+}
+
+static int config_props(AVFilterLink *link)
+{
+ UnsharpContext *unsharp = link->dst->priv;
+
+ init_filter_param(link->dst, &unsharp->luma, "luma", link->w);
+ init_filter_param(link->dst, &unsharp->chroma, "chroma", CHROMA_WIDTH(link));
+
+ return 0;
+}
+
+static void free_filter_param(FilterParam *fp)
+{
+ int z;
+
+ for (z = 0; z < 2 * fp->steps_y; z++)
+ av_free(fp->sc[z]);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ UnsharpContext *unsharp = ctx->priv;
+
+ free_filter_param(&unsharp->luma);
+ free_filter_param(&unsharp->chroma);
+}
+
+static void end_frame(AVFilterLink *link)
+{
+ UnsharpContext *unsharp = link->dst->priv;
+ AVFilterPicRef *in = link->cur_pic;
+ AVFilterPicRef *out = link->dst->outputs[0]->outpic;
+
+ unsharpen(out->data[0], in->data[0], out->linesize[0], in->linesize[0], link->w, link->h, &unsharp->luma);
+ unsharpen(out->data[1], in->data[1], out->linesize[1], in->linesize[1], CHROMA_WIDTH(link), CHROMA_HEIGHT(link), &unsharp->chroma);
+ unsharpen(out->data[2], in->data[2], out->linesize[2], in->linesize[2], CHROMA_WIDTH(link), CHROMA_HEIGHT(link), &unsharp->chroma);
+
+ avfilter_unref_pic(in);
+ avfilter_draw_slice(link->dst->outputs[0], 0, link->h, 1);
+ avfilter_end_frame(link->dst->outputs[0]);
+ avfilter_unref_pic(out);
+}
+
+static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
+{
+}
+
+AVFilter avfilter_vf_unsharp = {
+ .name = "unsharp",
+ .description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."),
+
+ .priv_size = sizeof(UnsharpContext),
+
+ .init = init,
+ .uninit = uninit,
+ .query_formats = query_formats,
+
+ .inputs = (AVFilterPad[]) {{ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .draw_slice = draw_slice,
+ .end_frame = end_frame,
+ .config_props = config_props,
+ .min_perms = AV_PERM_READ, },
+ { .name = NULL}},
+
+ .outputs = (AVFilterPad[]) {{ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO, },
+ { .name = NULL}},
+};
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