mirror of https://git.ffmpeg.org/ffmpeg.git
278 lines
9.5 KiB
C
278 lines
9.5 KiB
C
/*
|
|
* 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 Libav.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* blur / sharpen filter, ported to Libav from MPlayer
|
|
* libmpcodecs/unsharp.c.
|
|
*
|
|
* 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 "formats.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/mem.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/pixdesc.h"
|
|
|
|
#define MIN_SIZE 3
|
|
#define MAX_SIZE 13
|
|
|
|
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 UnsharpContext {
|
|
const AVClass *class;
|
|
int lmsize_x, lmsize_y, cmsize_x, cmsize_y;
|
|
float lamount, camount;
|
|
FilterParam luma; ///< luma parameters (width, height, amount)
|
|
FilterParam chroma; ///< chroma parameters (width, height, amount)
|
|
int hsub, vsub;
|
|
} UnsharpContext;
|
|
|
|
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)
|
|
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++) {
|
|
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 ? 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;
|
|
}
|
|
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) {
|
|
const 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, float 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)
|
|
{
|
|
UnsharpContext *unsharp = ctx->priv;
|
|
|
|
set_filter_param(&unsharp->luma, unsharp->lmsize_x, unsharp->lmsize_y, unsharp->lamount);
|
|
set_filter_param(&unsharp->chroma, unsharp->cmsize_x, unsharp->cmsize_y, unsharp->camount);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
enum AVPixelFormat pix_fmts[] = {
|
|
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV410P,
|
|
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
|
|
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE
|
|
};
|
|
|
|
ff_set_common_formats(ctx, ff_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_VERBOSE, "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;
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
|
|
|
|
unsharp->hsub = desc->log2_chroma_w;
|
|
unsharp->vsub = desc->log2_chroma_h;
|
|
|
|
init_filter_param(link->dst, &unsharp->luma, "luma", link->w);
|
|
init_filter_param(link->dst, &unsharp->chroma, "chroma", AV_CEIL_RSHIFT(link->w, unsharp->hsub));
|
|
|
|
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 int filter_frame(AVFilterLink *link, AVFrame *in)
|
|
{
|
|
UnsharpContext *unsharp = link->dst->priv;
|
|
AVFilterLink *outlink = link->dst->outputs[0];
|
|
AVFrame *out;
|
|
int cw = AV_CEIL_RSHIFT(link->w, unsharp->hsub);
|
|
int ch = AV_CEIL_RSHIFT(link->h, unsharp->vsub);
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
av_frame_free(&in);
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(UnsharpContext, x)
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
|
|
static const AVOption options[] = {
|
|
{ "luma_msize_x", "luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
|
|
{ "luma_msize_y", "luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
|
|
{ "luma_amount", "luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS },
|
|
{ "chroma_msize_x", "chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
|
|
{ "chroma_msize_y", "chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
|
|
{ "chroma_amount", "chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass unsharp_class = {
|
|
.class_name = "unsharp",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
static const AVFilterPad avfilter_vf_unsharp_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
.config_props = config_props,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad avfilter_vf_unsharp_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_vf_unsharp = {
|
|
.name = "unsharp",
|
|
.description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."),
|
|
|
|
.priv_size = sizeof(UnsharpContext),
|
|
.priv_class = &unsharp_class,
|
|
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
|
|
.inputs = avfilter_vf_unsharp_inputs,
|
|
|
|
.outputs = avfilter_vf_unsharp_outputs,
|
|
};
|