| /* GStreamer |
| * Copyright (C) 2013 Rdio, Inc. <ingestions@rdio.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin Street, Suite 500, |
| * Boston, MA 02110-1335, USA. |
| */ |
| /** |
| * SECTION:element-gstcombdetect |
| * @title: gstcombdetect |
| * |
| * The combdetect element detects if combing artifacts are present in |
| * a raw video stream, and if so, marks them with a zebra stripe |
| * pattern. |
| * |
| * ## Example launch line |
| * |[ |
| * gst-launch-1.0 -v filesrc location=file.mov ! decodebin ! combdetect ! |
| * xvimagesink |
| * ]| |
| * |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <gst/gst.h> |
| #include <gst/video/video.h> |
| #include <gst/video/gstvideofilter.h> |
| #include "gstcombdetect.h" |
| |
| #include <string.h> |
| |
| GST_DEBUG_CATEGORY_STATIC (gst_comb_detect_debug_category); |
| #define GST_CAT_DEFAULT gst_comb_detect_debug_category |
| |
| /* prototypes */ |
| |
| |
| static GstCaps *gst_comb_detect_transform_caps (GstBaseTransform * trans, |
| GstPadDirection direction, GstCaps * caps, GstCaps * filter); |
| static gboolean gst_comb_detect_set_info (GstVideoFilter * filter, |
| GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps, |
| GstVideoInfo * out_info); |
| static GstFlowReturn gst_comb_detect_transform_frame (GstVideoFilter * filter, |
| GstVideoFrame * inframe, GstVideoFrame * outframe); |
| |
| enum |
| { |
| PROP_0 |
| }; |
| |
| /* pad templates */ |
| |
| /* Yeah, the max width is hard-coded 2048. */ |
| #define MAX_WIDTH 2048 |
| #define VIDEO_CAPS \ |
| "video/x-raw, " \ |
| "format = (string) { I420, Y444, Y42B }, " \ |
| "width = [1, 2048], " \ |
| "height = " GST_VIDEO_SIZE_RANGE ", " \ |
| "framerate = " GST_VIDEO_FPS_RANGE |
| |
| static GstStaticPadTemplate gst_comb_detect_sink_template = |
| GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (VIDEO_CAPS) |
| ); |
| |
| static GstStaticPadTemplate gst_comb_detect_src_template = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (VIDEO_CAPS) |
| ); |
| |
| |
| /* class initialization */ |
| |
| G_DEFINE_TYPE_WITH_CODE (GstCombDetect, gst_comb_detect, GST_TYPE_VIDEO_FILTER, |
| GST_DEBUG_CATEGORY_INIT (gst_comb_detect_debug_category, "combdetect", 0, |
| "debug category for combdetect element")); |
| |
| static void |
| gst_comb_detect_class_init (GstCombDetectClass * klass) |
| { |
| GstBaseTransformClass *base_transform_class = |
| GST_BASE_TRANSFORM_CLASS (klass); |
| GstVideoFilterClass *video_filter_class = GST_VIDEO_FILTER_CLASS (klass); |
| |
| /* Setting up pads and setting metadata should be moved to |
| base_class_init if you intend to subclass this class. */ |
| gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass), |
| &gst_comb_detect_sink_template); |
| gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass), |
| &gst_comb_detect_src_template); |
| |
| gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass), |
| "Comb Detect", "Video/Filter", "Detect combing artifacts in video stream", |
| "David Schleef <ds@schleef.org>"); |
| |
| base_transform_class->transform_caps = |
| GST_DEBUG_FUNCPTR (gst_comb_detect_transform_caps); |
| video_filter_class->set_info = GST_DEBUG_FUNCPTR (gst_comb_detect_set_info); |
| video_filter_class->transform_frame = |
| GST_DEBUG_FUNCPTR (gst_comb_detect_transform_frame); |
| |
| } |
| |
| static void |
| gst_comb_detect_init (GstCombDetect * combdetect) |
| { |
| } |
| |
| |
| static GstCaps * |
| gst_comb_detect_transform_caps (GstBaseTransform * trans, |
| GstPadDirection direction, GstCaps * caps, GstCaps * filter) |
| { |
| GstCaps *othercaps; |
| int i; |
| |
| othercaps = gst_caps_copy (caps); |
| |
| if (direction == GST_PAD_SRC) { |
| GValue value = G_VALUE_INIT; |
| GValue v = G_VALUE_INIT; |
| |
| g_value_init (&value, GST_TYPE_LIST); |
| g_value_init (&v, G_TYPE_STRING); |
| |
| g_value_set_string (&v, "interleaved"); |
| gst_value_list_append_value (&value, &v); |
| g_value_set_string (&v, "mixed"); |
| gst_value_list_append_value (&value, &v); |
| g_value_set_string (&v, "progressive"); |
| gst_value_list_append_value (&value, &v); |
| |
| for (i = 0; i < gst_caps_get_size (othercaps); i++) { |
| GstStructure *structure = gst_caps_get_structure (othercaps, i); |
| gst_structure_set_value (structure, "interlace-mode", &value); |
| } |
| g_value_unset (&value); |
| g_value_unset (&v); |
| } else { |
| for (i = 0; i < gst_caps_get_size (othercaps); i++) { |
| GstStructure *structure = gst_caps_get_structure (othercaps, i); |
| gst_structure_set (structure, "interlace-mode", G_TYPE_STRING, |
| "progressive", NULL); |
| } |
| } |
| |
| if (filter) { |
| GstCaps *intersect; |
| |
| intersect = gst_caps_intersect (othercaps, filter); |
| gst_caps_unref (othercaps); |
| othercaps = intersect; |
| } |
| |
| return othercaps; |
| } |
| |
| |
| static gboolean |
| gst_comb_detect_set_info (GstVideoFilter * filter, |
| GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps, |
| GstVideoInfo * out_info) |
| { |
| GstCombDetect *combdetect = GST_COMB_DETECT (filter); |
| |
| memcpy (&combdetect->vinfo, in_info, sizeof (GstVideoInfo)); |
| |
| return TRUE; |
| } |
| |
| static GstFlowReturn |
| gst_comb_detect_transform_frame (GstVideoFilter * filter, |
| GstVideoFrame * inframe, GstVideoFrame * outframe) |
| { |
| static int z; |
| int k; |
| int height; |
| int width; |
| |
| #define GET_LINE(frame,comp,line) (((unsigned char *)(frame)->data[k]) + \ |
| (line) * GST_VIDEO_FRAME_COMP_STRIDE((frame), (comp))) |
| |
| z++; |
| |
| for (k = 1; k < 3; k++) { |
| int i; |
| height = GST_VIDEO_FRAME_COMP_HEIGHT (outframe, k); |
| width = GST_VIDEO_FRAME_COMP_WIDTH (outframe, k); |
| for (i = 0; i < height; i++) { |
| memcpy (GET_LINE (outframe, k, i), GET_LINE (inframe, k, i), width); |
| } |
| } |
| |
| { |
| int j; |
| int thisline[MAX_WIDTH]; |
| int score = 0; |
| |
| height = GST_VIDEO_FRAME_COMP_HEIGHT (outframe, 0); |
| width = GST_VIDEO_FRAME_COMP_WIDTH (outframe, 0); |
| |
| memset (thisline, 0, sizeof (thisline)); |
| |
| k = 0; |
| for (j = 0; j < height; j++) { |
| int i; |
| if (j < 2 || j >= height - 2) { |
| guint8 *dest = GET_LINE (outframe, 0, j); |
| guint8 *src = GET_LINE (inframe, 0, j); |
| for (i = 0; i < width; i++) { |
| dest[i] = src[i] / 2; |
| } |
| } else { |
| guint8 *dest = GET_LINE (outframe, 0, j); |
| guint8 *src1 = GET_LINE (inframe, 0, j - 1); |
| guint8 *src2 = GET_LINE (inframe, 0, j); |
| guint8 *src3 = GET_LINE (inframe, 0, j + 1); |
| |
| for (i = 0; i < width; i++) { |
| if (src2[i] < MIN (src1[i], src3[i]) - 5 || |
| src2[i] > MAX (src1[i], src3[i]) + 5) { |
| if (i > 0) { |
| thisline[i] += thisline[i - 1]; |
| } |
| thisline[i]++; |
| if (thisline[i] > 1000) |
| thisline[i] = 1000; |
| } else { |
| thisline[i] = 0; |
| } |
| if (thisline[i] > 100) { |
| dest[i] = ((i + j + z) & 0x4) ? 235 : 16; |
| score++; |
| } else { |
| dest[i] = src2[i]; |
| } |
| } |
| } |
| } |
| |
| if (score > 10) |
| GST_DEBUG ("score %d", score); |
| } |
| |
| return GST_FLOW_OK; |
| } |