[PATCH] Implement libopencv smooth filter.
Stefano Sabatini
stefano.sabatini-lala
Tue Aug 3 02:22:20 CEST 2010
---
Changelog | 1 +
configure | 8 ++
doc/filters.texi | 27 ++++++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_libopencv.c | 156 ++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 194 insertions(+), 0 deletions(-)
create mode 100644 libavfilter/vf_libopencv.c
diff --git a/Changelog b/Changelog
index 70849ea..a46e448 100644
--- a/Changelog
+++ b/Changelog
@@ -34,6 +34,7 @@ version <next>:
- a64 codec
- MMS-HTTP support
- G.722 ADPCM audio decoder
+- ocv_smooth filter
version 0.6:
diff --git a/configure b/configure
index ae3d738..26db167 100755
--- a/configure
+++ b/configure
@@ -164,6 +164,7 @@ External library support:
--enable-bzlib enable bzlib [autodetect]
--enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
--enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
+ --enable-libopencv enable video filtering via libopencv [no]
--enable-libdc1394 enable IIDC-1394 grabbing using libdc1394
and libraw1394 [no]
--enable-libdirac enable Dirac support via libdirac [no]
@@ -887,6 +888,7 @@ CONFIG_LIST="
libnut
libopencore_amrnb
libopencore_amrwb
+ libopencv
libopenjpeg
librtmp
libschroedinger
@@ -1390,6 +1392,9 @@ rtp_protocol_select="udp_protocol"
tcp_protocol_deps="network"
udp_protocol_deps="network"
+# filters
+ocv_smooth_filter_deps="libopencv"
+
# libraries
avdevice_deps="avcodec avformat"
avformat_deps="avcodec"
@@ -2713,6 +2718,8 @@ enabled libmp3lame && require libmp3lame lame/lame.h lame_init -lmp3lame
enabled libnut && require libnut libnut.h nut_demuxer_init -lnut
enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
+enabled libopencv && { check_lib opencv/cv.h cvCreateImageHeader $(pkg-config --libs opencv) ||
+ die "ERROR: libopencv not found"; }
enabled libopenjpeg && require libopenjpeg openjpeg.h opj_version -lopenjpeg
enabled librtmp && { check_lib librtmp/rtmp.h RTMP_Socket $(pkg-config --libs librtmp) ||
die "ERROR: librtmp not found or RTMP_Socket() missing, librtmp version must be >= 2.2.f"; }
@@ -2997,6 +3004,7 @@ echo "libmp3lame enabled ${libmp3lame-no}"
echo "libnut enabled ${libnut-no}"
echo "libopencore-amrnb support ${libopencore_amrnb-no}"
echo "libopencore-amrwb support ${libopencore_amrwb-no}"
+echo "libopencv support ${libopencv-no}"
echo "libopenjpeg enabled ${libopenjpeg-no}"
echo "librtmp enabled ${librtmp-no}"
echo "libschroedinger enabled ${libschroedinger-no}"
diff --git a/doc/filters.texi b/doc/filters.texi
index 60ecf56..7004783 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -112,6 +112,33 @@ input to the vflip filter.
Pass the video source unchanged to the output.
+ at section ocv_smooth
+
+Apply smooth transform using libopencv.
+
+To enable this filter install libopencv library and headers and
+configure FFmpeg with --enable-libopencv.
+
+It accepts the following parameters:
+ at var{type}:@var{param1}:@var{param2}:@var{param3}:@var{param4}.
+
+ at var{type} is the type of smooth filter to apply, and can be one of
+the following value: "blur", "blur_no_scale", "median", "gaussian",
+"bilateral". The default value is "gaussian".
+
+ at var{param1}, @var{param2}, @var{param3}, and @var{param4} are
+parameters whose meanings depend on smooth type. @var{param1} and
+ at var{param2} accept integer positive values or 0, @var{param3} and
+ at var{param4} accept float values.
+
+The default value for @var{param1} is 3, the default value for the
+other parameters is 0.
+
+These parameters corresponds to the parameters assigned to the
+libopencv function @code{cvSmooth}. Refer the official libopencv
+documentation for the exact meaning of the parameters:
+ at url{http://opencv.willowgarage.com/documentation/c/image_filtering.html}
+
@section pad
Add paddings to the input image, and places the original input at the
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index d2a40c4..a15c3f1 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -23,6 +23,7 @@ OBJS-$(CONFIG_FORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_HFLIP_FILTER) += vf_hflip.o
OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_NULL_FILTER) += vf_null.o
+OBJS-$(CONFIG_OCV_SMOOTH_FILTER) += vf_libopencv.o
OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o
OBJS-$(CONFIG_PIXDESCTEST_FILTER) += vf_pixdesctest.o
OBJS-$(CONFIG_PIXELASPECT_FILTER) += vf_aspect.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 27442f6..fb84968 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -43,6 +43,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (HFLIP, hflip, vf);
REGISTER_FILTER (NOFORMAT, noformat, vf);
REGISTER_FILTER (NULL, null, vf);
+ REGISTER_FILTER (OCV_SMOOTH, ocv_smooth, vf);
REGISTER_FILTER (PAD, pad, vf);
REGISTER_FILTER (PIXDESCTEST, pixdesctest, vf);
REGISTER_FILTER (PIXELASPECT, pixelaspect, vf);
diff --git a/libavfilter/vf_libopencv.c b/libavfilter/vf_libopencv.c
new file mode 100644
index 0000000..63d5b61
--- /dev/null
+++ b/libavfilter/vf_libopencv.c
@@ -0,0 +1,156 @@
+/*
+ * copyright Stefano Sabatini 2010
+ *
+ * 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) { }
+
+#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);
+ }
+
+ 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(AVFilterLink *inlink)
+{
+ SmoothContext *smooth = inlink->dst->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);
+ 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_smooth = {
+ .name = "ocv_smooth",
+ .description = "Apply smooth transform using libopencv.",
+
+ .priv_size = sizeof(SmoothContext),
+
+ .query_formats = query_formats,
+ .init = smooth_init,
+
+ .inputs = (AVFilterPad[]) {{ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .draw_slice = null_draw_slice,
+ .end_frame = smooth_end_frame,
+ .min_perms = AV_PERM_READ },
+ { .name = NULL}},
+
+ .outputs = (AVFilterPad[]) {{ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO, },
+ { .name = NULL}},
+};
+
+#endif /* CONFIG_OCV_SMOOTH_FILTER */
--
1.7.1
--wac7ysb48OaltWcw--
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