Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
 
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Re: Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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Re: Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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Re: Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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On 20/02/18 09:52, jeremi.wojcicki wrote:
> I have used GAPID tool for OpenGL debugging (which actually is quite an > awesome tool) and I have confirmed that indeed gstreamer creates a new GL > context with eglCreateContext but with share_context as NULL. This means > that for some reasons the context I provide, using methods shown in sdlshare > and sdlshare2 examples, is ignored. > > <http://gstreamer-devel.966125.n4.nabble.com/file/t377800/gapid.png> > > This slightly narrows down the problem, but I still don't get what is the > reason. Looking into the gstglcontext_egl.c I don't see a clear point in > which the "other_context" could be stripped: > > static gboolean > gst_gl_context_egl_create_context (GstGLContext * context, > GstGLAPI gl_api, GstGLContext * other_context, GError ** error) > { > GstGLContextEGL *egl; > GstGLWindow *window = NULL; > EGLNativeWindowType window_handle = (EGLNativeWindowType) 0; > EGLint majorVersion; > EGLint minorVersion; > gboolean need_surface = TRUE; > guintptr external_gl_context = 0; > GstGLDisplay *display; > > egl = GST_GL_CONTEXT_EGL (context); > window = gst_gl_context_get_window (context); > > GST_DEBUG_OBJECT (context, "Creating EGL context"); > > if (other_context) { > // ======= I don’t know if other_context is != NULL at this point, but it is > quite possible > > if (gst_gl_context_get_gl_platform (other_context) != > GST_GL_PLATFORM_EGL) { > g_set_error (error, GST_GL_CONTEXT_ERROR, > GST_GL_CONTEXT_ERROR_WRONG_CONFIG, > "Cannot share context with non-EGL context"); > // ======== I don’t reach this point > goto failure; > } > external_gl_context = gst_gl_context_get_gl_context (other_context); > } > > if ((gl_api & (GST_GL_API_OPENGL | GST_GL_API_OPENGL3 | GST_GL_API_GLES2)) > == > GST_GL_API_NONE) { > > ... > // =========== OPENGL case – not relevant > ... > > > } else if (gl_api & GST_GL_API_GLES2) { > gint i; > > try_gles2: > if (!eglBindAPI (EGL_OPENGL_ES_API)) { > g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED, > "Failed to bind OpenGL|ES API: %s", > gst_gl_context_egl_get_error_string (eglGetError ())); > goto failure; > } > > // ============ I get this message > > GST_INFO ("Bound OpenGL|ES"); > > > for (i = 0; i < G_N_ELEMENTS (gles2_versions); i++) { > gint profileMask = 0; > gint contextFlags = 0; > > if (!gst_gl_context_egl_choose_config (egl, GST_GL_API_GLES2, > gles2_versions[i].major, error)) { > continue; > } > #if defined(EGL_KHR_create_context) > /* try a debug context */ > contextFlags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR; > > egl->egl_context = > _create_context_with_flags (egl, (EGLContext) external_gl_context, > GST_GL_API_GLES2, gles2_versions[i].major, > gles2_versions[i].minor, contextFlags, profileMask); > > if (egl->egl_context) > break; > > /* try without a debug context */ > contextFlags &= ~EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR; > #endif > > egl->egl_context = > _create_context_with_flags (egl, (EGLContext) external_gl_context, > GST_GL_API_GLES2, gles2_versions[i].major, > gles2_versions[i].minor, contextFlags, profileMask); > > if (egl->egl_context) > break; > } > egl->gl_api = GST_GL_API_GLES2; > } > > if (egl->egl_context != EGL_NO_CONTEXT) { > // ====== I get this message > GST_INFO ("gl context created: %" G_GUINTPTR_FORMAT, > (guintptr) egl->egl_context); > } else { > g_set_error (error, GST_GL_CONTEXT_ERROR, > GST_GL_CONTEXT_ERROR_CREATE_CONTEXT, > "Failed to create a OpenGL context: %s", > gst_gl_context_egl_get_error_string (eglGetError ())); > goto failure; > } > > Just for reference, I share the current version of context setting (in the > bus need-context callback): > > case GST_MESSAGE_NEED_CONTEXT: > { > > // we got gl_display and gl_context and starting of the main > loop > > GstElement *element = GST_ELEMENT (message->src); > const gchar *name = gst_element_get_name(element); > > LOG_INFO("Element %s asks for context. We give => 0x%08x > 0x%08x", name, data->egl_context, data->egl_display); > > const gchar *context_type; > > gst_message_parse_context_type (message, &context_type); > g_print ("got need context %s\n", context_type); > > if (g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) > { > GstContext *display_context = > gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE); > gst_context_set_gl_display (display_context, > data->gst_display); > gst_element_set_context (GST_ELEMENT (message->src), > display_context); > return TRUE; > } else if (g_strcmp0 (context_type, "gst.gl.app_context") == 0) > { > GstContext *app_context = gst_context_new > ("gst.gl.app_context", TRUE); > GstStructure *s = gst_context_writable_structure > (app_context); > gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT, > data->gst_context, NULL); > gst_element_set_context (GST_ELEMENT (message->src), > app_context); > return TRUE; > } > break; > > } handler and not the async bus handler and that data->gst_context holds a valid GstGLContext. The other thing to check is the GStreamer debug logs, specifically with GST_DEBUG=gl*:7,GST_CONTEXT:7 to ensure that your provided GL context is being used correctly. Cheers -Matt > Any remarks would be much appreciated. > > Best, > Jeremi _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Re: Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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Re: Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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Re: Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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Re: Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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Re: Problem with context sharing (glupload) with an OVR thread (Oculus Mobile SDK)
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