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gl: context_egl: Add a helper to list all supported fourcc/modifiers

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This helper creates a GST_TYPE_LIST of all possible DRM formats that the context
can support. This will be needed to fix support for formats that aren't emulated
using GStreamer shaders.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9306>
This commit is contained in:
Nicolas Dufresne 2025-06-27 17:16:19 -04:00 committed by GStreamer Marge Bot
parent ef98722709
commit c475088501
2 changed files with 56 additions and 0 deletions
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52
subprojects/gst-plugins-base/gst-libs/gst/gl/egl/gstglcontext_egl.c
View File

@ -1892,6 +1892,58 @@ gst_gl_context_egl_format_supports_modifier (GstGLContext * context,
return FALSE;
}
/**
* gst_gl_context_egl_format_list_all_drm_formats:
* @context: an EGL #GstGLContext
* @drm_fmt_list: a #GValue initialized to hold %GST_TYPE_LIST
*
* Append all fourcc/modifier pair supported for this egl context. This is
* useful when implementating direct dmabuf upload as all the formats can be
* processed as RGBA in this case.
*
* Since 1.28
*/
void
gst_gl_context_egl_format_list_all_drm_formats (GstGLContext * context,
GValue * drm_fmt_list)
{
#if GST_GL_HAVE_DMABUF
GstGLContextEGL *egl;
g_return_if_fail (GST_IS_GL_CONTEXT_EGL (context));
g_return_if_fail (GST_VALUE_HOLDS_LIST (drm_fmt_list));
if (!gst_gl_context_egl_fetch_dma_formats (context))
return;
egl = GST_GL_CONTEXT_EGL (context);
GST_OBJECT_LOCK (context);
if (!egl->dma_formats)
goto beach;
for (gint i = 0; i < egl->dma_formats->len; i++) {
GstGLDmaFormat *format;
format = &g_array_index (egl->dma_formats, GstGLDmaFormat, i);
for (gint j = 0; j < format->modifiers->len; j++) {
GstGLDmaModifier *modifier;
GValue value = G_VALUE_INIT;
g_value_init (&value, G_TYPE_STRING);
modifier = &g_array_index (format->modifiers, GstGLDmaModifier, j);
gchar *drm_fmt_str = gst_video_dma_drm_fourcc_to_string (format->fourcc,
modifier->modifier);
g_value_take_string (&value, drm_fmt_str);
gst_value_list_append_and_take_value (drm_fmt_list, &value);
}
}
beach:
GST_OBJECT_UNLOCK (context);
#endif
}
/**
* gst_gl_context_egl_supports_modifier: (skip)
* @context: an EGL #GStGLContext

4
subprojects/gst-plugins-base/gst-libs/gst/gl/egl/gstglcontext_egl.h
View File

@ -120,6 +120,10 @@ gboolean gst_gl_context_egl_format_supports_modifier (GstGLContext *
guint64 modifier,
gboolean include_external);
G_GNUC_INTERNAL
void gst_gl_context_egl_format_list_all_drm_formats (GstGLContext * context,
GValue *drm_fmt_list);
G_GNUC_INTERNAL
gboolean gst_gl_context_egl_supports_modifier (GstGLContext * context);
G_END_DECLS