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/*
* Copyright (c) 2010 Stefano Sabatini
*
* 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
* libopencv wrapper functions
*/
#include <opencv/cv.h>
#include <opencv/cxtypes.h>
#include "avfilter.h"
static void fill_iplimage_from_picref(IplImage *img, const AVFilterBufferRef *picref, enum PixelFormat pixfmt)
{
IplImage *tmpimg;
int depth, channels_nb;
if (pixfmt == PIX_FMT_GRAY8) { depth = IPL_DEPTH_8U; channels_nb = 1; }
else if (pixfmt == PIX_FMT_BGRA) { depth = IPL_DEPTH_8U; channels_nb = 4; }
else if (pixfmt == PIX_FMT_BGR24) { depth = IPL_DEPTH_8U; channels_nb = 3; }
else return;
tmpimg = cvCreateImageHeader((CvSize){picref->video->w, picref->video->h}, depth, channels_nb);
*img = *tmpimg;
img->imageData = img->imageDataOrigin = picref->data[0];
img->dataOrder = IPL_DATA_ORDER_PIXEL;
img->origin = IPL_ORIGIN_TL;
img->widthStep = picref->linesize[0];
}
static void fill_picref_from_iplimage(AVFilterBufferRef *picref, const IplImage *img, enum PixelFormat pixfmt)
{
picref->linesize[0] = img->widthStep;
picref->data[0] = img->imageData;
}
static int query_formats(AVFilterContext *ctx)
{
static const enum PixelFormat pix_fmts[] = {
PIX_FMT_BGR24, PIX_FMT_BGRA, PIX_FMT_GRAY8, PIX_FMT_NONE
};
avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
typedef struct {
const char *name;
int (*init)(AVFilterContext *ctx, const char *args, void *opaque);
void (*uninit)(AVFilterContext *ctx);
void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
void *priv;
} OCVContext;
typedef struct {
int type;
int param1, param2;
double param3, param4;
} SmoothContext;
static av_cold int smooth_init(AVFilterContext *ctx, const char *args, void *opaque)
{
OCVContext *ocv = ctx->priv;
SmoothContext *smooth = ocv->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);
}
if (smooth->param1 < 0 || !(smooth->param1%2)) {
av_log(ctx, AV_LOG_ERROR,
"Invalid value '%d' for param1, it has to be a positive odd number\n",
smooth->param1);
return AVERROR(EINVAL);
}
if ((smooth->type == CV_BLUR || smooth->type == CV_BLUR_NO_SCALE || smooth->type == CV_GAUSSIAN) &&
(smooth->param2 < 0 || (smooth->param2 && !(smooth->param2%2)))) {
av_log(ctx, AV_LOG_ERROR,
"Invalid value '%d' for param2, it has to be zero or a positive odd number\n",
smooth->param2);
return AVERROR(EINVAL);
}
av_log(ctx, AV_LOG_INFO, "type:%s param1:%d param2:%d param3:%f param4:%f\n",
type_str, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
return 0;
}
static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
{
OCVContext *ocv = ctx->priv;
SmoothContext *smooth = ocv->priv;
cvSmooth(inimg, outimg, smooth->type, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
}
typedef struct {
const char *name;
size_t priv_size;
int (*init)(AVFilterContext *ctx, const char *args, void *opaque);
void (*uninit)(AVFilterContext *ctx);
void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
} OCVFilterEntry;
static OCVFilterEntry ocv_filter_entries[] = {
{ "smooth", sizeof(SmoothContext), smooth_init, NULL, smooth_end_frame_filter },
};
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
OCVContext *ocv = ctx->priv;
char name[128], priv_args[1024];
int i;
char c;
sscanf(args, "%127[^=:]%c%1023s", name, &c, priv_args);
for (i = 0; i < FF_ARRAY_ELEMS(ocv_filter_entries); i++) {
OCVFilterEntry *entry = &ocv_filter_entries[i];
if (!strcmp(name, entry->name)) {
ocv->name = entry->name;
ocv->init = entry->init;
ocv->uninit = entry->uninit;
ocv->end_frame_filter = entry->end_frame_filter;
if (!(ocv->priv = av_mallocz(entry->priv_size)))
return AVERROR(ENOMEM);
return ocv->init(ctx, priv_args, opaque);
}
}
av_log(ctx, AV_LOG_ERROR, "No libopencv filter named '%s'\n", name);
return AVERROR(EINVAL);
}
static av_cold void uninit(AVFilterContext *ctx)
{
OCVContext *ocv = ctx->priv;
if (ocv->uninit)
ocv->uninit(ctx);
av_free(ocv->priv);
memset(ocv, 0, sizeof(*ocv));
}
static void end_frame(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
OCVContext *ocv = ctx->priv;
AVFilterLink *outlink= inlink->dst->outputs[0];
AVFilterBufferRef *inpicref = inlink ->cur_buf;
AVFilterBufferRef *outpicref = outlink->out_buf;
IplImage inimg, outimg;
fill_iplimage_from_picref(&inimg , inpicref , inlink->format);
fill_iplimage_from_picref(&outimg, outpicref, inlink->format);
ocv->end_frame_filter(ctx, &inimg, &outimg);
fill_picref_from_iplimage(outpicref, &outimg, inlink->format);
avfilter_unref_buffer(inpicref);
avfilter_draw_slice(outlink, 0, outlink->h, 1);
avfilter_end_frame(outlink);
avfilter_unref_buffer(outpicref);
}
AVFilter avfilter_vf_ocv = {
.name = "ocv",
.description = NULL_IF_CONFIG_SMALL("Apply transform using libopencv."),
.priv_size = sizeof(OCVContext),
.query_formats = query_formats,
.init = init,
.uninit = uninit,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.draw_slice = null_draw_slice,
.end_frame = end_frame,
.min_perms = AV_PERM_READ },
{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO, },
{ .name = NULL}},
};
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