[FFmpeg-devel] [POF] libopencv smooth filter
Stefano Sabatini
stefano.sabatini-lala
Sun Sep 5 23:34:16 CEST 2010
On date Sunday 2010-09-05 18:42:35 +0200, Michael Niedermayer encoded:
> On Tue, Aug 03, 2010 at 03:05:11AM +0200, Stefano Sabatini wrote:
> [...]
> > + *
> > + * 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
> > + * libopencv wrapper functions
> > + */
> > +
> > +#include "opencv/cv.h"
> > +#include "opencv/cxtypes.h"
> > +#include "avfilter.h"
> > +
> > +static void fill_iplimage_from_picref(IplImage *img, const AVFilterPicRef *picref, enum PixelFormat pixfmt)
> > +{
> > + int i;
> > + IplImage *tmpimg;
> > +
> > + struct {
> > + enum PixelFormat pixfmt;
> > + int depth;
> > + int channels;
> > + } entry, pixfmt_iplimage_map[] = {
> > + { PIX_FMT_GRAY8, IPL_DEPTH_8U, 1 },
> > + { PIX_FMT_BGRA , IPL_DEPTH_8U, 4 },
> > + { PIX_FMT_BGR24, IPL_DEPTH_8U, 3 },
> > + { PIX_FMT_NONE }
> > + };
> > +
> > + for (i = 0; i < FF_ARRAY_ELEMS(pixfmt_iplimage_map); i++) {
> > + entry = pixfmt_iplimage_map[i];
> > + if (pixfmt == entry.pixfmt)
> > + break;
> > + }
>
> > + if (entry.pixfmt == PIX_FMT_NONE)
> > + assert(1);
>
> ?
Ehm I suppose I can skip this.
> [...]
> > +#if CONFIG_OCV_SMOOTH_FILTER
> > +
> > +typedef struct {
> > + int type;
> > + int param1, param2;
> > + double param3, param4;
> > +} SmoothContext;
> > +
> > +static av_cold int smooth_init(AVFilterContext *ctx, const char *args, void *opaque)
> > +{
> > + SmoothContext *smooth = ctx->priv;
> > + char type_str[128] = "gaussian";
> > +
> > + smooth->param1 = 3;
> > + smooth->param2 = 0;
> > + smooth->param3 = 0.0;
> > + smooth->param4 = 0.0;
> > +
> > + if (args)
> > + sscanf(args, "%127[^:]:%d:%d:%lf:%lf", type_str, &smooth->param1, &smooth->param2, &smooth->param3, &smooth->param4);
> > +
> > + if (!strcmp(type_str, "blur" )) smooth->type = CV_BLUR;
> > + else if (!strcmp(type_str, "blur_no_scale")) smooth->type = CV_BLUR_NO_SCALE;
> > + else if (!strcmp(type_str, "median" )) smooth->type = CV_MEDIAN;
> > + else if (!strcmp(type_str, "gaussian" )) smooth->type = CV_GAUSSIAN;
> > + else if (!strcmp(type_str, "bilateral" )) smooth->type = CV_BILATERAL;
> > + else {
> > + av_log(ctx, AV_LOG_ERROR, "Smoothing type '%s' unknown\n.", type_str);
> > + return AVERROR(EINVAL);
> > + }
>
> its a bit ugly, to implement such wraper for each filter
What do you exactly mean? For opencv there is no way to implement a
general wrapper (as opposed to frei0r) because for filtering we have
to use each time a different function with a different interface.
Regards.
--
FFmpeg = Faithful and Fucking Martial Programmable Enlightened Generator
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