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Redesign the libopencv wrapper to make it more generic. Accept both

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FILTERNAME=ARGS and FILTERNAME:ARGS syntax.

The same filter class will be used for managing all the libopencv
filtering functions.

Originally committed as revision 26079 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2010-12-23 17:24:19 +00:00
parent 8399d23517
commit cf69ad35c5
7 changed files with 103 additions and 24 deletions
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1
Changelog
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@ -66,6 +66,7 @@ version <next>:
- FLAC parser added
- gradfun filter added
- AMR-WB decoder
- replace the ocv_smooth filter by a more generic ocv filter
version 0.6:

2
configure vendored
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@ -1413,7 +1413,7 @@ cropdetect_filter_deps="gpl"
frei0r_filter_deps="frei0r dlopen strtok_r"
frei0r_src_filter_deps="frei0r dlopen strtok_r"
hqdn3d_filter_deps="gpl"
ocv_smooth_filter_deps="libopencv"
ocv_filter_deps="libopencv"
yadif_filter_deps="gpl"
# libraries

27
doc/filters.texi
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@ -512,14 +512,31 @@ input to the vflip filter.
Pass the video source unchanged to the output.
@section ocv_smooth
@section ocv
Apply smooth transform using libopencv.
Apply video transform using libopencv.
To enable this filter install libopencv library and headers and
configure FFmpeg with --enable-libopencv.
The filter accepts the following parameters:
The filter takes the parameters: @var{filter_name}@{:=@}@var{filter_params}.
@var{filter_name} is the name of the libopencv filter to apply.
@var{filter_params} specifies the parameters to pass to the libopencv
filter. If not specified the default values are assumed.
Refer to the official libopencv documentation for more precise
informations:
@url{http://opencv.willowgarage.com/documentation/c/image_filtering.html}
Follows the list of supported libopencv filters.
@subsection smooth
Smooth the input video.
The filter takes the following parameters:
@var{type}:@var{param1}:@var{param2}:@var{param3}:@var{param4}.
@var{type} is the type of smooth filter to apply, and can be one of
@ -535,9 +552,7 @@ The default value for @var{param1} is 3, the default value for the
other parameters is 0.
These parameters correspond to the parameters assigned to the
libopencv function @code{cvSmooth}. Refer to the official libopencv
documentation for the exact meaning of the parameters:
@url{http://opencv.willowgarage.com/documentation/c/image_filtering.html}
libopencv function @code{cvSmooth}.
@section overlay

2
libavfilter/Makefile
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@ -31,7 +31,7 @@ OBJS-$(CONFIG_HFLIP_FILTER) += vf_hflip.o
OBJS-$(CONFIG_HQDN3D_FILTER) += vf_hqdn3d.o
OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_NULL_FILTER) += vf_null.o
OBJS-$(CONFIG_OCV_SMOOTH_FILTER) += vf_libopencv.o
OBJS-$(CONFIG_OCV_FILTER) += vf_libopencv.o
OBJS-$(CONFIG_OVERLAY_FILTER) += vf_overlay.o
OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o
OBJS-$(CONFIG_PIXDESCTEST_FILTER) += vf_pixdesctest.o

2
libavfilter/allfilters.c
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@ -52,7 +52,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (HQDN3D, hqdn3d, vf);
REGISTER_FILTER (NOFORMAT, noformat, vf);
REGISTER_FILTER (NULL, null, vf);
REGISTER_FILTER (OCV_SMOOTH, ocv_smooth, vf);
REGISTER_FILTER (OCV, ocv, vf);
REGISTER_FILTER (OVERLAY, overlay, vf);
REGISTER_FILTER (PAD, pad, vf);
REGISTER_FILTER (PIXDESCTEST, pixdesctest, vf);

2
libavfilter/avfilter.h
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@ -27,7 +27,7 @@
#include "libavcore/samplefmt.h"
#define LIBAVFILTER_VERSION_MAJOR 1
#define LIBAVFILTER_VERSION_MINOR 69
#define LIBAVFILTER_VERSION_MINOR 70
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

91
libavfilter/vf_libopencv.c
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@ -63,7 +63,13 @@ static int query_formats(AVFilterContext *ctx)
static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
#if CONFIG_OCV_SMOOTH_FILTER
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;
@ -73,7 +79,8 @@ typedef struct {
static av_cold int smooth_init(AVFilterContext *ctx, const char *args, void *opaque)
{
SmoothContext *smooth = ctx->priv;
OCVContext *ocv = ctx->priv;
SmoothContext *smooth = ocv->priv;
char type_str[128] = "gaussian";
smooth->param1 = 3;
@ -113,17 +120,74 @@ static av_cold int smooth_init(AVFilterContext *ctx, const char *args, void *opa
return 0;
}
static void smooth_end_frame(AVFilterLink *inlink)
static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
{
SmoothContext *smooth = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
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);
cvSmooth(&inimg, &outimg, smooth->type, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
ocv->end_frame_filter(ctx, &inimg, &outimg);
fill_picref_from_iplimage(outpicref, &outimg, inlink->format);
avfilter_unref_buffer(inpicref);
@ -132,19 +196,20 @@ static void smooth_end_frame(AVFilterLink *inlink)
avfilter_unref_buffer(outpicref);
}
AVFilter avfilter_vf_ocv_smooth = {
.name = "ocv_smooth",
.description = NULL_IF_CONFIG_SMALL("Apply smooth transform using libopencv."),
AVFilter avfilter_vf_ocv = {
.name = "ocv",
.description = NULL_IF_CONFIG_SMALL("Apply transform using libopencv."),
.priv_size = sizeof(SmoothContext),
.priv_size = sizeof(OCVContext),
.query_formats = query_formats,
.init = smooth_init,
.init = init,
.uninit = uninit,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.draw_slice = null_draw_slice,
.end_frame = smooth_end_frame,
.end_frame = end_frame,
.min_perms = AV_PERM_READ },
{ .name = NULL}},
@ -152,5 +217,3 @@ AVFilter avfilter_vf_ocv_smooth = {
.type = AVMEDIA_TYPE_VIDEO, },
{ .name = NULL}},
};
#endif /* CONFIG_OCV_SMOOTH_FILTER */