问题描述
我的项目在rockchip rk3288 处理器（Tinkerboard）上使用buildroot。我的项目使用 Qt 和 gstreamer。由于 libmali gbm 库为我的 Qt 应用程序提供了 eglfs_kms，我正在从 wayland/weston 移到 x。我之前用过 eglfs，开机速度很快，很简单，而且不像 wayland 那样依赖于 weston。
这是我的旧配置 QT_QPA_PLATFORM=wayland ./MyGUIApplication /usr/lib/libmali.so -> /usr/lib/libmali-wayland.so
这是我的新配置 QT_QPA_PLATFORM=eglfs_kms ./MyGUIApplication /usr/lib/libmali.so -> /usr/lib/libmali-gbm.so
为了获得 gbm 库，我更新了我的 buildroot 配置以删除 wayland 并添加了 xorg7
@@ -69,6 +69,7 @@
BR2_PACKAGE_GST1_PLUGINS_BASE_PLUGIN_VIDEOTESTSRC=y
BR2_PACKAGE_GST1_PLUGINS_BASE_PLUGIN_VIDEORATE=y
BR2_PACKAGE_GST1_PLUGINS_BASE_LIB_OPENGL=y
+# BR2_PACKAGE_GST1_PLUGINS_BASE_LIB_OPENGL_OPENGL is not set
BR2_PACKAGE_GST1_PLUGINS_BASE_PLUGIN_ALSA=y
BR2_PACKAGE_GST1_PLUGINS_BASE_PLUGIN_OGG=y
BR2_PACKAGE_GST1_PLUGINS_BASE_PLUGIN_PANGO=y
@@ -124,13 +125,16 @@
BR2_PACKAGE_E2FSPROGS_RESIZE2FS=y
BR2_PACKAGE_GLMARK2=y
BR2_PACKAGE_MESA3D_galLIUM_DRIVER_SWRAST=y
+BR2_PACKAGE_MESA3D_OSMESA=y
BR2_PACKAGE_PSPLASH=y
BR2_PACKAGE_SDL2=y
BR2_PACKAGE_SDL2_KMSDRM=y
+BR2_PACKAGE_SDL2_OPENGL=y
BR2_PACKAGE_SDL2_OPENGLES=y
BR2_PACKAGE_SDL2_TTF=y
BR2_PACKAGE_QT5=y
BR2_PACKAGE_QT5BASE_sqlITE_SYstem=y
+BR2_PACKAGE_QT5BASE_OPENGL_ES2=y
BR2_PACKAGE_QT5BASE_LINUXFB=y
BR2_PACKAGE_QT5BASE_EGLFS=y
BR2_PACKAGE_QT5BASE_JPEG=y
@@ -142,9 +146,8 @@
BR2_PACKAGE_QT5TOOLS=y
BR2_PACKAGE_QT5TOOLS_LINGUIST_TOOLS=y
BR2_PACKAGE_QT5VIRTUALKEYBOARD=y
-BR2_PACKAGE_QT5WAYLAND=y
-BR2_PACKAGE_WESTON=y
-BR2_PACKAGE_WESTON_DRM=y
+BR2_PACKAGE_XORG7=y
+BR2_PACKAGE_XKEYBOARD_CONfig=y
BR2_PACKAGE_AVRDUDE=y
BR2_PACKAGE_EDID_DECODE=y
BR2_PACKAGE_EVTEST=y
问题是 gstreamer gl 库不适用于这个新配置。
# gst-launch-1.0 videotestsrc ! glupload ! glfiltercube ! gldownload ! fakesink
Setting pipeline to PAUSED ...
Pipeline is prerollING ...
Got context from element 'gldownloadelement0': gst.gl.GLdisplay=context,gst.gl.GLdisplay=(GstGLdisplay)"\(GstGLdisplayEGL\)\ gldisplayegl0";
ERROR: from element /GstPipeline:pipeline0/GstGLFilterCube:glfiltercube0: Failed to initialize egl: EGL_BAD_disPLAY
Additional debug info:
gstglbasefilter.c(395): gst_gl_base_filter_decide_allocation (): /GstPipeline:pipeline0/GstGLFilterCube:glfiltercube0
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...
运行 GST_DEBUG="*:4" 时出现以下特定错误：
INFO GST_CONTEXT gstglutils.c:115:pad_query:<glfiltercube0:sink> pad peer query Failed
INFO glcontext gstglcontext.c:337:gst_gl_context_new: creating a context for display <gldisplayegl0>,user choice:(null)
INFO glwindow gstglwindow.c:251:gst_gl_window_new: creating a window,user choice:(null)
INFO glwindow gstglwindow_x11.c:141:gst_gl_window_x11_new: Wrong display type 32 for this window type 1
WARN glwindow gstglwindow.c:293:gst_gl_window_new: Could not create window. user specified (null),creating dummy window
INFO glcontext gstglcontext.c:1240:gst_gl_context_create_thread:<glcontextegl0> Attempting to create opengl context. user chosen api(s) (any),compiled api support (gles2) display api (opengl opengl3 gles2)
WARN glcontext gstglcontext.c:1244:gst_gl_context_create_thread:<glcontextegl0> Failed to create context
INFO glcontext gstglcontext.c:1046:gst_gl_context_create:<glcontextegl0> gl thread created
WARN glbasefilter gstglbasefilter.c:395:gst_gl_base_filter_decide_allocation:<glfiltercube0> error: Failed to initialize egl: EGL_BAD_disPLAY
INFO GST_ERROR_SYstem gstelement.c:2145:gst_element_message_full_with_details:<glfiltercube0> posting message: Failed to initialize egl: EGL_BAD_disPLAY
INFO GST_ERROR_SYstem gstelement.c:2172:gst_element_message_full_with_details:<glfiltercube0> posted error message: Failed to initialize egl: EGL_BAD_disPLAY ERROR: from element / GstPipeline:pipeline0/
其他 gstreamer 库工作正常，但我需要 gstopengl 库来进行有效的转换，因此使用几何变换等软件插件是不可接受的。
我不是显示概念的菜鸟，但我不是专家。我是否从 buildroot 中遗漏了 gstgl 需要的某些东西才能正常工作？
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