FaSTTUBe/GST-Tensordecoder-ov_ep
37
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Wiki Activity

video-info: Validate chroma-site when parsing caps and set defaults if none is set

Browse Source 
Previously there was no validation at all and the defaults were set if the
colorimetry was not set or invalid, but there's not really any connection
between colorimetry and chroma-site.

More validation could make sense in the future.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8258>
This commit is contained in:
Sebastian Dröge 2025-01-09 10:03:45 +02:00 committed by Thibault Saunier
parent bdce7166b8
commit 959ccf65ad
3 changed files with 57 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
girs/GstVideo-1.0.gir
View File

@ -5650,7 +5650,7 @@ performed.</doc>
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/video/video-chroma.h">chroma is vertically cosited</doc>
</member>
<member name="alt_line" value="8" c:identifier="GST_VIDEO_CHROMA_SITE_ALT_LINE" glib:nick="alt-line" glib:name="GST_VIDEO_CHROMA_SITE_ALT_LINE">
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/video/video-chroma.h">choma samples are sited on alternate lines</doc>
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/video/video-chroma.h">chroma samples are sited on alternate lines</doc>
</member>
<member name="cosited" value="6" c:identifier="GST_VIDEO_CHROMA_SITE_COSITED" glib:nick="cosited" glib:name="GST_VIDEO_CHROMA_SITE_COSITED">
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/video/video-chroma.h">chroma samples cosited with luma samples</doc>

2
subprojects/gst-plugins-base/gst-libs/gst/video/video-chroma.h
View File

@ -31,7 +31,7 @@ G_BEGIN_DECLS
* @GST_VIDEO_CHROMA_SITE_NONE: no cositing
* @GST_VIDEO_CHROMA_SITE_H_COSITED: chroma is horizontally cosited
* @GST_VIDEO_CHROMA_SITE_V_COSITED: chroma is vertically cosited
* @GST_VIDEO_CHROMA_SITE_ALT_LINE: choma samples are sited on alternate lines
* @GST_VIDEO_CHROMA_SITE_ALT_LINE: chroma samples are sited on alternate lines
* @GST_VIDEO_CHROMA_SITE_COSITED: chroma samples cosited with luma samples
* @GST_VIDEO_CHROMA_SITE_JPEG: jpeg style cositing, also for mpeg1 and mjpeg
* @GST_VIDEO_CHROMA_SITE_MPEG2: mpeg2 style cositing

61
subprojects/gst-plugins-base/gst-libs/gst/video/video-info.c
View File

@ -166,10 +166,8 @@ set_default_colorimetry (GstVideoInfo * info)
if (GST_VIDEO_FORMAT_INFO_IS_YUV (finfo)) {
if (info->height > 576) {
info->chroma_site = GST_VIDEO_CHROMA_SITE_H_COSITED;
info->colorimetry = default_color[DEFAULT_YUV_HD];
} else {
info->chroma_site = GST_VIDEO_CHROMA_SITE_NONE;
info->colorimetry = default_color[DEFAULT_YUV_SD];
}
} else if (GST_VIDEO_FORMAT_INFO_IS_GRAY (finfo)) {
@ -182,7 +180,7 @@ set_default_colorimetry (GstVideoInfo * info)
}
static gboolean
validate_colorimetry (GstVideoInfo * info)
validate_colorimetry (const GstVideoInfo * info)
{
const GstVideoFormatInfo *finfo = info->finfo;
@ -205,6 +203,48 @@ validate_colorimetry (GstVideoInfo * info)
return TRUE;
}
static void
set_default_chroma_site (GstVideoInfo * info)
{
const GstVideoFormatInfo *finfo = info->finfo;
if (GST_VIDEO_FORMAT_INFO_IS_YUV (finfo)) {
if (info->height > 576) {
info->chroma_site = GST_VIDEO_CHROMA_SITE_H_COSITED;
} else {
info->chroma_site = GST_VIDEO_CHROMA_SITE_NONE;
}
} else {
info->chroma_site = GST_VIDEO_CHROMA_SITE_UNKNOWN;
}
}
static gboolean
validate_chroma_site (const GstVideoInfo * info)
{
const GstVideoFormatInfo *finfo = info->finfo;
if (GST_VIDEO_FORMAT_INFO_IS_YUV (finfo)) {
// FIXME: Might also want to check here for subsampling?
// - chroma-site only makes sense with subsampled formats?
// - ALT_LINE only makes sense for formats with vertical subsampling, and if
// also V_COSITED?
if ((info->chroma_site & GST_VIDEO_CHROMA_SITE_NONE) &&
(info->chroma_site & (GST_VIDEO_CHROMA_SITE_H_COSITED |
GST_VIDEO_CHROMA_SITE_V_COSITED))) {
GST_WARNING
("No chroma siting together with horizontal or vertical cositing is invalid");
return FALSE;
}
} else if (info->chroma_site != GST_VIDEO_CHROMA_SITE_UNKNOWN) {
GST_WARNING ("chroma-site only makes sense for YUV formats, %s is none",
finfo->name);
return FALSE;
}
return TRUE;
}
static gboolean
gst_video_info_set_format_common (GstVideoInfo * info, GstVideoFormat format,
guint width, guint height)
@ -503,10 +543,19 @@ gst_video_info_from_caps (GstVideoInfo * info, const GstCaps * caps)
* PAR to be doubled/halved too many times */
}
if ((s = gst_structure_get_string (structure, "chroma-site")))
if ((s = gst_structure_get_string (structure, "chroma-site"))) {
info->chroma_site = gst_video_chroma_site_from_string (s);
else
info->chroma_site = GST_VIDEO_CHROMA_SITE_UNKNOWN;
if (!validate_chroma_site (info)) {
GST_WARNING ("invalid chroma-site, using default");
set_default_chroma_site (info);
} else if (GST_VIDEO_FORMAT_INFO_IS_YUV (info->finfo)
&& info->chroma_site == GST_VIDEO_CHROMA_SITE_UNKNOWN) {
/* force a default chroma-site for YUV formats */
set_default_chroma_site (info);
}
} else {
set_default_chroma_site (info);
}
if ((s = gst_structure_get_string (structure, "colorimetry"))) {
if (!gst_video_colorimetry_from_string (&info->colorimetry, s)) {