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6e43f75df3
Some elements had vague caps, such as "video/x-raw-rgb", which caused problems at least with textwrite. For other elements, the underlying OpenCV functions support more than just one image type, so I increased the number of supported caps. I created a utility function "gst_opencv_caps_from_cv_image_type", so each element creates caps directly from OpenCV image types, such as CV_8UC1 for 8-bit grayscale. This function uses gstvideo to create uniform caps. https://bugzilla.gnome.org/show_bug.cgi?id=635304
124 lines
No EOL
4.2 KiB
C
124 lines
No EOL
4.2 KiB
C
/* GStreamer
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* Copyright (C) <2010> Thiago Santos <thiago.sousa.santos@collabora.co.uk>
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*
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* gstopencvutils.c: miscellaneous utility functions
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "gstopencvutils.h"
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static gboolean
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gst_opencv_get_ipl_depth_and_channels (GstStructure * structure,
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gint * ipldepth, gint * channels, GError ** err)
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{
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gint depth, bpp;
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if (!gst_structure_get_int (structure, "depth", &depth) ||
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!gst_structure_get_int (structure, "bpp", &bpp)) {
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g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
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"No depth/bpp in caps");
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return FALSE;
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}
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if (depth != bpp) {
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g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
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"Depth and bpp should be equal");
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return FALSE;
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}
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if (gst_structure_has_name (structure, "video/x-raw-rgb")) {
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*channels = 3;
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} else if (gst_structure_has_name (structure, "video/x-raw-gray")) {
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*channels = 1;
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} else {
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g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
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"Unsupported caps %s", gst_structure_get_name (structure));
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return FALSE;
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}
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if (depth / *channels == 8) {
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/* TODO signdness? */
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*ipldepth = IPL_DEPTH_8U;
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} else if (depth / *channels == 16) {
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*ipldepth = IPL_DEPTH_16U;
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} else {
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g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
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"Unsupported depth/channels %d/%d", depth, *channels);
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return FALSE;
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}
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return TRUE;
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}
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gboolean
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gst_opencv_parse_iplimage_params_from_structure (GstStructure * structure,
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gint * width, gint * height, gint * ipldepth, gint * channels,
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GError ** err)
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{
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if (!gst_opencv_get_ipl_depth_and_channels (structure, ipldepth, channels,
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err)) {
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return FALSE;
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}
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if (!gst_structure_get_int (structure, "width", width) ||
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!gst_structure_get_int (structure, "height", height)) {
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g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
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"No width/height in caps");
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return FALSE;
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}
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return TRUE;
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}
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gboolean
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gst_opencv_parse_iplimage_params_from_caps (GstCaps * caps, gint * width,
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gint * height, gint * ipldepth, gint * channels, GError ** err)
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{
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return
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gst_opencv_parse_iplimage_params_from_structure (gst_caps_get_structure
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(caps, 0), width, height, ipldepth, channels, err);
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}
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GstCaps *
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gst_opencv_caps_from_cv_image_type (int cv_type)
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{
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GstCaps * caps = gst_caps_new_empty ();
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switch (cv_type) {
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case CV_8UC1:
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_GRAY8));
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break;
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case CV_8UC3:
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_RGB));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_BGR));
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break;
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case CV_8UC4:
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_RGBx));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_xRGB));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_BGRx));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_xBGR));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_RGBA));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_ARGB));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_BGRA));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_ABGR));
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break;
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case CV_16UC1:
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_GRAY16("1234")));
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gst_caps_append (caps, gst_caps_from_string (GST_VIDEO_CAPS_GRAY16("4321")));
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break;
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}
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return caps;
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} |