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opencv: account for sparse/padded formats when converting caps to cv image type

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=774576
This commit is contained in:
Philippe Renon 2016-11-26 13:34:26 +01:00 committed by Nicolas Dufresne
parent cfc420bf4d
commit f6021e0016
2 changed files with 56 additions and 28 deletions
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79
gst-libs/gst/opencv/gstopencvutils.cpp
View file

@ -26,17 +26,19 @@
#include "gstopencvutils.h"
#include <opencv2/core/core_c.h>
gboolean
gst_opencv_parse_iplimage_params_from_caps (GstCaps * caps, gint * width,
gint * height, gint * ipldepth, gint * channels, GError ** err)
{
GstVideoInfo info;
gchar *caps_str;
if (!gst_video_info_from_caps (&info, caps)) {
GST_ERROR ("Failed to get the videoinfo from caps");
caps_str = gst_caps_to_string (caps);
GST_ERROR ("Failed to get video info from caps %s", caps_str);
g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
"No width/heighti/depth/channels in caps");
"Failed to get video info from caps %s", caps_str);
g_free (caps_str);
return FALSE;
}
@ -48,35 +50,58 @@ gboolean
gst_opencv_iplimage_params_from_video_info (GstVideoInfo * info, gint * width,
gint * height, gint * ipldepth, gint * channels, GError ** err)
{
gint depth = 0;
guint i;
GstVideoFormat format;
int cv_type;
format = GST_VIDEO_INFO_FORMAT (info);
if (!gst_opencv_cv_image_type_from_video_format (format, &cv_type, err)) {
return FALSE;
}
*width = GST_VIDEO_INFO_WIDTH (info);
*height = GST_VIDEO_INFO_HEIGHT (info);
if (GST_VIDEO_INFO_IS_RGB (info))
*channels = 3;
else if (GST_VIDEO_INFO_IS_GRAY (info))
*channels = 1;
else {
g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
"Unsupported video format %s",
gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (info)));
return FALSE;
*ipldepth = cvIplDepth (cv_type);
*channels = CV_MAT_CN (cv_type);
return TRUE;
}
gboolean
gst_opencv_cv_image_type_from_video_format (GstVideoFormat format,
int * cv_type, GError ** err)
{
const gchar *format_str;
switch (format) {
case GST_VIDEO_FORMAT_GRAY8:
*cv_type = CV_8UC1;
break;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
*cv_type = CV_8UC3;
break;
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_ABGR:
*cv_type = CV_8UC4;
break;
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_GRAY16_BE:
*cv_type = CV_16UC1;
break;
default:
format_str = gst_video_format_to_string (format);
g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
"Unsupported video format %s", format_str);
return FALSE;
}
for (i = 0; i < GST_VIDEO_INFO_N_COMPONENTS (info); i++)
depth += GST_VIDEO_INFO_COMP_DEPTH (info, i);
if (depth / *channels == 8) {
/* TODO signdness? */
*ipldepth = IPL_DEPTH_8U;
} else if (depth / *channels == 16) {
*ipldepth = IPL_DEPTH_16U;
} else {
g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_NEGOTIATION,
"Unsupported depth/channels %d/%d", depth, *channels);
return FALSE;
}
return TRUE;
}

5
gst-libs/gst/opencv/gstopencvutils.h
View file

@ -29,7 +29,6 @@
#include <gst/gst.h>
#include <gst/video/video.h>
G_BEGIN_DECLS
gboolean gst_opencv_parse_iplimage_params_from_caps
@ -40,7 +39,11 @@ gboolean gst_opencv_iplimage_params_from_video_info
(GstVideoInfo * info, gint * width, gint * height, gint * depth,
gint * channels, GError ** err);
gboolean gst_opencv_cv_image_type_from_video_format (GstVideoFormat format,
int * cv_type, GError ** err);
GstCaps * gst_opencv_caps_from_cv_image_type (int cv_type);
G_END_DECLS
#endif /* __GST_OPENCV_UTILS__ */