/*
- * Ported to FFmpeg from MPlayer libmpcodecs/unsharp.c
- * Original copyright (C) 2002 Remi Guyomarch <rguyom@pobox.com>
- * Port copyright (C) 2010 Daniel G. Taylor <dan@programmer-art.org>
+ * Original copyright (c) 2002 Remi Guyomarch <rguyom@pobox.com>
+ * Port copyright (c) 2010 Daniel G. Taylor <dan@programmer-art.org>
* Relicensed to the LGPL with permission from Remi Guyomarch.
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
- * blur / sharpen filter
+ * blur / sharpen filter, ported to Libav from MPlayer
+ * libmpcodecs/unsharp.c.
*
* This code is based on:
*
#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)
+/* right-shift and round-up */
+#define SHIFTUP(x,shift) (-((-(x))>>(shift)))
typedef struct FilterParam {
int msize_x; ///< matrix width
typedef struct {
FilterParam luma; ///< luma parameters (width, height, amount)
FilterParam chroma; ///< chroma parameters (width, height, amount)
+ int hsub, vsub;
} UnsharpContext;
-static void unsharpen(uint8_t *dst, uint8_t *src, int dst_stride, int src_stride, int width, int height, FilterParam *fp)
+static void apply_unsharp( uint8_t *dst, int dst_stride,
+ const uint8_t *src, 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;
+ const uint8_t *src2;
if (!fp->amount) {
if (dst_stride == src_stride)
memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * fp->steps_x));
for (y = -fp->steps_y; y < height + fp->steps_y; y++) {
+ if (y < height)
+ src2 = src;
+
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];
+ tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[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;
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;
+ int lmsize_x = 5, cmsize_x = 5;
+ int lmsize_y = 5, cmsize_y = 5;
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);
- if (lmsize_x < 2 || lmsize_y < 2 || cmsize_x < 2 || cmsize_y < 2) {
+ if ((lamount && (lmsize_x < 2 || lmsize_y < 2)) ||
+ (camount && (cmsize_x < 2 || cmsize_y < 2))) {
av_log(ctx, AV_LOG_ERROR,
"Invalid value <2 for lmsize_x:%d or lmsize_y:%d or cmsize_x:%d or cmsize_y:%d\n",
lmsize_x, lmsize_y, cmsize_x, cmsize_y);
{
UnsharpContext *unsharp = link->dst->priv;
+ unsharp->hsub = av_pix_fmt_descriptors[link->format].log2_chroma_w;
+ unsharp->vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
+
init_filter_param(link->dst, &unsharp->luma, "luma", link->w);
- init_filter_param(link->dst, &unsharp->chroma, "chroma", CHROMA_WIDTH(link));
+ init_filter_param(link->dst, &unsharp->chroma, "chroma", SHIFTUP(link->w, unsharp->hsub));
return 0;
}
UnsharpContext *unsharp = link->dst->priv;
AVFilterBufferRef *in = link->cur_buf;
AVFilterBufferRef *out = link->dst->outputs[0]->out_buf;
+ int cw = SHIFTUP(link->w, unsharp->hsub);
+ int ch = SHIFTUP(link->h, unsharp->vsub);
- 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);
+ apply_unsharp(out->data[0], out->linesize[0], in->data[0], in->linesize[0], link->w, link->h, &unsharp->luma);
+ apply_unsharp(out->data[1], out->linesize[1], in->data[1], in->linesize[1], cw, ch, &unsharp->chroma);
+ apply_unsharp(out->data[2], out->linesize[2], in->data[2], in->linesize[2], cw, ch, &unsharp->chroma);
avfilter_unref_buffer(in);
avfilter_draw_slice(link->dst->outputs[0], 0, link->h, 1);
projects / ffmpeg / blobdiff