mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 01:00:37 +00:00
[852/906] use GstContext for GstGLDisplay propogation
implements the hooks required in GstElement::set_context and the context query
This commit is contained in:
Matthew Waters
Tim-Philipp Müller
parent
f15206082a
commit
64fad7a6d2
6 changed files with 335 additions and 32 deletions
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@ -28,11 +28,13 @@
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#include "gl.h"
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#include "gstgldisplay.h"
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GST_DEBUG_CATEGORY_STATIC (gst_context);
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GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
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#define GST_CAT_DEFAULT gst_gl_display_debug
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_INIT (gst_gl_display_debug, "gldisplay", 0, "opengl display");
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GST_DEBUG_CATEGORY_INIT (gst_gl_display_debug, "gldisplay", 0, "opengl display"); \
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GST_DEBUG_CATEGORY_GET (gst_context, "GST_CONTEXT");
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G_DEFINE_TYPE_WITH_CODE (GstGLDisplay, gst_gl_display, G_TYPE_OBJECT,
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DEBUG_INIT);
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@ -66,6 +68,8 @@ gst_gl_display_init (GstGLDisplay * display)
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display->gl_api = GST_GL_API_NONE;
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GST_TRACE ("init %p", display);
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gst_gl_memory_init ();
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}
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@ -79,6 +83,8 @@ gst_gl_display_finalize (GObject * object)
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display->context = NULL;
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}
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GST_TRACE ("finalize %p", object);
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G_OBJECT_CLASS (gst_gl_display_parent_class)->finalize (object);
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}
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@ -142,6 +148,11 @@ gst_context_set_gl_display (GstContext * context, GstGLDisplay * display)
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{
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GstStructure *s;
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g_return_if_fail (context != NULL);
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GST_CAT_LOG (gst_context, "setting GstGLDisplay(%p) on context(%p)", display,
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context);
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s = gst_context_writable_structure (context);
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gst_structure_set (s, GST_GL_DISPLAY_CONTEXT_TYPE, GST_TYPE_GL_DISPLAY,
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display, NULL);
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@ -151,8 +162,17 @@ gboolean
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gst_context_get_gl_display (GstContext * context, GstGLDisplay ** display)
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{
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const GstStructure *s;
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gboolean ret;
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g_return_val_if_fail (display != NULL, FALSE);
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g_return_val_if_fail (context != NULL, FALSE);
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s = gst_context_get_structure (context);
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return gst_structure_get (s, GST_GL_DISPLAY_CONTEXT_TYPE,
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ret = gst_structure_get (s, GST_GL_DISPLAY_CONTEXT_TYPE,
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GST_TYPE_GL_DISPLAY, display, NULL);
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GST_CAT_LOG (gst_context, "got GstGLDisplay(%p) from context(%p)", *display,
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context);
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return ret;
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}
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@ -62,6 +62,8 @@ static void gst_gl_filter_set_property (GObject * object, guint prop_id,
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static void gst_gl_filter_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_gl_filter_set_context (GstElement * element,
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GstContext * context);
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static gboolean gst_gl_filter_query (GstBaseTransform * trans,
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GstPadDirection direction, GstQuery * query);
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static GstCaps *gst_gl_filter_transform_caps (GstBaseTransform * bt,
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@ -112,6 +114,8 @@ gst_gl_filter_class_init (GstGLFilterClass * klass)
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gst_gl_filter_decide_allocation;
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GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size = gst_gl_filter_get_unit_size;
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element_class->set_context = gst_gl_filter_set_context;
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g_object_class_install_property (gobject_class, PROP_OTHER_CONTEXT,
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g_param_spec_object ("other-context",
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"External OpenGL context",
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@ -176,6 +180,14 @@ gst_gl_filter_get_property (GObject * object, guint prop_id,
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}
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}
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static void
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gst_gl_filter_set_context (GstElement * element, GstContext * context)
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{
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GstGLFilter *filter = GST_GL_FILTER (element);
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gst_gl_handle_set_context (element, context, &filter->display);
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}
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static gboolean
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gst_gl_filter_query (GstBaseTransform * trans, GstPadDirection direction,
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GstQuery * query)
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@ -186,13 +198,19 @@ gst_gl_filter_query (GstBaseTransform * trans, GstPadDirection direction,
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filter = GST_GL_FILTER (trans);
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CONTEXT:
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{
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res = gst_gl_handle_context_query ((GstElement *) filter, query,
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&filter->display);
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break;
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}
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case GST_QUERY_CUSTOM:
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{
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GstStructure *structure = gst_query_writable_structure (query);
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if (direction == GST_PAD_SINK &&
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gst_structure_has_name (structure, "gstgldisplay")) {
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gst_structure_set (structure, "gstgldisplay", G_TYPE_POINTER,
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filter->display, NULL);
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gst_structure_has_name (structure, "gstglcontext")) {
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gst_structure_set (structure, "gstglcontext", G_TYPE_POINTER,
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filter->context, NULL);
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res = TRUE;
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} else
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res =
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@ -243,6 +261,10 @@ gst_gl_filter_reset (GstGLFilter * filter)
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if (filter->other_context)
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gst_object_unref (filter->other_context);
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filter->other_context = NULL;
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if (filter->context)
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gst_object_unref (filter->context);
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filter->context = NULL;
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}
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static gboolean
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@ -251,28 +273,29 @@ gst_gl_filter_start (GstBaseTransform * bt)
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GstGLFilter *filter = GST_GL_FILTER (bt);
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GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter);
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GstStructure *structure;
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GstQuery *display_query;
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GstQuery *context_query;
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const GValue *id_value;
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structure = gst_structure_new_empty ("gstgldisplay");
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display_query = gst_query_new_custom (GST_QUERY_CUSTOM, structure);
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if (!gst_gl_ensure_display (filter, &filter->display))
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return FALSE;
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if (!gst_pad_peer_query (bt->srcpad, display_query)) {
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structure = gst_structure_new_empty ("gstglcontext");
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context_query = gst_query_new_custom (GST_QUERY_CUSTOM, structure);
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if (!gst_pad_peer_query (bt->srcpad, context_query)) {
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GST_WARNING
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("Could not query GstGLDisplay from downstream (peer query failed)");
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("Could not query GstGLContext from downstream (peer query failed)");
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}
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id_value = gst_structure_get_value (structure, "gstgldisplay");
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id_value = gst_structure_get_value (structure, "gstglcontext");
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if (G_VALUE_HOLDS_POINTER (id_value)) {
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/* at least one gl element is after in our gl chain */
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filter->display =
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gst_object_ref (GST_GL_DISPLAY (g_value_get_pointer (id_value)));
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filter->context = gst_gl_display_get_context (filter->display);
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filter->context =
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gst_object_ref (GST_GL_CONTEXT (g_value_get_pointer (id_value)));
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} else {
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GError *error = NULL;
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GST_INFO ("Creating GstGLDisplay");
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filter->display = gst_gl_display_new ();
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GST_INFO ("Creating GstGLContext");
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filter->context = gst_gl_context_new (filter->display);
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if (!gst_gl_context_create (filter->context, filter->other_context, &error)) {
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@ -282,6 +305,8 @@ gst_gl_filter_start (GstBaseTransform * bt)
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}
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}
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gst_query_unref (context_query);
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if (filter_class->onStart)
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filter_class->onStart (filter);
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@ -1067,6 +1092,9 @@ gst_gl_filter_transform (GstBaseTransform * bt, GstBuffer * inbuf,
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filter = GST_GL_FILTER (bt);
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filter_class = GST_GL_FILTER_GET_CLASS (bt);
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if (!gst_gl_ensure_display (filter, &filter->display))
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return GST_FLOW_NOT_NEGOTIATED;
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g_assert (filter_class->filter || filter_class->filter_texture);
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if (filter_class->filter)
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@ -65,7 +65,6 @@ struct _GstGLFilter
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GstBufferPool *pool;
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GstGLDisplay *display;
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GstGLContext *context;
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GstVideoInfo in_info;
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GstVideoInfo out_info;
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@ -81,6 +80,7 @@ struct _GstGLFilter
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GstGLShader *default_shader;
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GstGLContext *context;
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GstGLContext *other_context;
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};
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@ -60,6 +60,8 @@ static gboolean gst_gl_mixer_sink_event (GstCollectPads * pads,
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GstCollectData * cdata, GstEvent * event, GstGLMixer * mix);
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static gboolean gst_gl_mixer_src_setcaps (GstPad * pad, GstGLMixer * mix,
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GstCaps * caps);
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static void gst_gl_mixer_set_context (GstElement * element,
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GstContext * context);
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enum
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{
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@ -346,15 +348,21 @@ gst_gl_mixer_sink_query (GstCollectPads * pads, GstCollectData * data,
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ret = TRUE;
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break;
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}
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case GST_QUERY_CONTEXT:
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{
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ret = gst_gl_handle_context_query ((GstElement *) mix, query,
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&mix->display);
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break;
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}
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case GST_QUERY_CUSTOM:
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{
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/* mix is a sink in terms of gl chain, so we are sharing the gldisplay that
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* comes from src pad with every display of the sink pads */
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GstStructure *structure = gst_query_writable_structure (query);
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if (gst_structure_has_name (structure, "gstgldisplay")) {
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gst_structure_set (structure, "gstgldisplay", G_TYPE_POINTER,
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mix->display, NULL);
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if (gst_structure_has_name (structure, "gstglcontext")) {
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gst_structure_set (structure, "gstglcontext", G_TYPE_POINTER,
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mix->context, NULL);
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} else {
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ret = gst_collect_pads_query_default (pads, data, query, FALSE);
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}
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@ -513,6 +521,7 @@ gst_gl_mixer_class_init (GstGLMixerClass * klass)
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GST_DEBUG_FUNCPTR (gst_gl_mixer_request_new_pad);
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element_class->release_pad = GST_DEBUG_FUNCPTR (gst_gl_mixer_release_pad);
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_gl_mixer_change_state);
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element_class->set_context = GST_DEBUG_FUNCPTR (gst_gl_mixer_set_context);
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/* Register the pad class */
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g_type_class_ref (GST_TYPE_GL_MIXER_PAD);
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@ -845,6 +854,14 @@ gst_gl_mixer_read_qos (GstGLMixer * mix, gdouble * proportion,
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GST_OBJECT_UNLOCK (mix);
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}
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static void
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gst_gl_mixer_set_context (GstElement * element, GstContext * context)
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{
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GstGLMixer *mix = GST_GL_MIXER (element);
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gst_gl_handle_set_context (element, context, &mix->display);
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}
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static gboolean
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gst_gl_mixer_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
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{
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@ -852,6 +869,12 @@ gst_gl_mixer_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
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gboolean res = FALSE;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CONTEXT:
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{
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res = gst_gl_handle_context_query ((GstElement *) mix, query,
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&mix->display);
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break;
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}
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case GST_QUERY_POSITION:
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{
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GstFormat format;
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@ -918,27 +941,29 @@ gst_gl_mixer_activate (GstGLMixer * mix, gboolean activate)
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{
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if (activate) {
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GstStructure *structure;
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GstQuery *display_query;
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GstQuery *context_query;
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const GValue *id_value;
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structure = gst_structure_new_empty ("gstgldisplay");
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display_query = gst_query_new_custom (GST_QUERY_CUSTOM, structure);
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if (!gst_pad_peer_query (mix->srcpad, display_query)) {
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GST_WARNING
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("Could not query GstGLDisplay from downstream (peer query failed)");
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if (!gst_gl_ensure_display (mix, &mix->display)) {
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return FALSE;
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}
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id_value = gst_structure_get_value (structure, "gstgldisplay");
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structure = gst_structure_new_empty ("gstglcontext");
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context_query = gst_query_new_custom (GST_QUERY_CUSTOM, structure);
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if (!gst_pad_peer_query (mix->srcpad, context_query)) {
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GST_WARNING
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("Could not query GstGLContext from downstream (peer query failed)");
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}
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id_value = gst_structure_get_value (structure, "gstglcontext");
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if (G_VALUE_HOLDS_POINTER (id_value)) {
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mix->display =
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gst_object_ref (GST_GL_DISPLAY (g_value_get_pointer (id_value)));
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mix->context = gst_gl_display_get_context (mix->display);
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mix->context =
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gst_object_ref (GST_GL_CONTEXT (g_value_get_pointer (id_value)));
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} else {
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GError *error = NULL;
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GST_INFO ("Creating GstGLDisplay");
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mix->display = gst_gl_display_new ();
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mix->context = gst_gl_context_new (mix->display);
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gst_gl_display_set_context (mix->display, mix->context);
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@ -365,3 +365,227 @@ gst_gl_context_del_shader (GstGLContext * context, GstGLShader * shader)
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{
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gst_object_unref (shader);
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}
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static gboolean
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gst_gl_display_found (GstElement * element, GstGLDisplay * display)
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{
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if (display) {
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GST_INFO_OBJECT (element, "already have a display (%p)", display);
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return TRUE;
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}
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return FALSE;
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}
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT);
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static gboolean
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context_pad_query (const GValue * item, GValue * value, gpointer user_data)
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{
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GstPad *pad = g_value_get_object (item);
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GstQuery *query = user_data;
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gboolean res;
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res = gst_pad_peer_query (pad, query);
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if (res) {
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g_value_set_boolean (value, TRUE);
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return FALSE;
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}
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GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, pad, "context pad peer query failed");
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return TRUE;
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}
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static gboolean
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run_context_query (GstElement * element, GstQuery * query,
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GstPadDirection direction)
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{
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GstIterator *it;
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GstIteratorFoldFunction func = context_pad_query;
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GValue res = { 0 };
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g_value_init (&res, G_TYPE_BOOLEAN);
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g_value_set_boolean (&res, FALSE);
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/* Ask neighbor */
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if (direction == GST_PAD_SRC)
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it = gst_element_iterate_src_pads (element);
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else
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it = gst_element_iterate_sink_pads (element);
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while (gst_iterator_fold (it, func, &res, query) == GST_ITERATOR_RESYNC)
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gst_iterator_resync (it);
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gst_iterator_free (it);
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return g_value_get_boolean (&res);
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}
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static void
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gst_gl_display_context_prepare (GstElement * element,
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GstGLDisplay ** display_ptr)
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{
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GstContext *ctxt;
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GstQuery *query;
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if (!GST_CAT_CONTEXT)
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GST_DEBUG_CATEGORY_GET (GST_CAT_CONTEXT, "GST_CONTEXT");
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/* 2a) Query downstream with GST_QUERY_CONTEXT for the context and
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* check if downstream already has a context of the specific type
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* 2b) Query upstream as above.
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*/
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ctxt = NULL;
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query = gst_query_new_context (GST_GL_DISPLAY_CONTEXT_TYPE);
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if (run_context_query (element, query, GST_PAD_SRC)) {
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GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
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"found context (%p) in downstream query", ctxt);
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gst_query_parse_context (query, &ctxt);
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} else if (run_context_query (element, query, GST_PAD_SINK)) {
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GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
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"found context (%p) in upstream query", ctxt);
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gst_query_parse_context (query, &ctxt);
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} else {
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/* 3) Post a GST_MESSAGE_NEED_CONTEXT message on the bus with
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* the required context type and afterwards check if a
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* usable context was set now as in 1). The message could
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* be handled by the parent bins of the element and the
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* application.
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*/
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GstMessage *msg;
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GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
|
||||
"posting need context message");
|
||||
msg = gst_message_new_need_context (GST_OBJECT_CAST (element),
|
||||
GST_GL_DISPLAY_CONTEXT_TYPE);
|
||||
gst_element_post_message (element, msg);
|
||||
}
|
||||
|
||||
/*
|
||||
* Whomever responds to the need-context message performs a
|
||||
* GstElement::set_context() with the required context in which the element
|
||||
* is required to update the display_ptr or call gst_gl_handle_set_context().
|
||||
*/
|
||||
if (ctxt) {
|
||||
if (gst_context_has_context_type (ctxt, GST_GL_DISPLAY_CONTEXT_TYPE)) {
|
||||
gst_context_get_gl_display (ctxt, display_ptr);
|
||||
}
|
||||
}
|
||||
|
||||
gst_query_unref (query);
|
||||
}
|
||||
|
||||
/* 4) Create a context by itself and post a GST_MESSAGE_HAVE_CONTEXT
|
||||
* message.
|
||||
*/
|
||||
static void
|
||||
gst_gl_display_context_propagate (GstElement * element, GstGLDisplay * display)
|
||||
{
|
||||
GstContext *context;
|
||||
GstMessage *msg;
|
||||
|
||||
if (!display) {
|
||||
GST_ERROR_OBJECT (element, "Could not get GL display connection");
|
||||
return;
|
||||
}
|
||||
|
||||
context = gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE);
|
||||
gst_context_set_gl_display (context, display);
|
||||
|
||||
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
|
||||
"posting have context (%p) message with display (%p)", context, display);
|
||||
msg = gst_message_new_have_context (GST_OBJECT_CAST (element), context);
|
||||
gst_element_post_message (GST_ELEMENT_CAST (element), msg);
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_gl_ensure_display (gpointer element, GstGLDisplay ** display_ptr)
|
||||
{
|
||||
GstGLDisplay *display;
|
||||
|
||||
g_return_val_if_fail (element != NULL, FALSE);
|
||||
g_return_val_if_fail (display_ptr != NULL, FALSE);
|
||||
|
||||
/* 1) Check if the element already has a context of the specific
|
||||
* type.
|
||||
*/
|
||||
display = *display_ptr;
|
||||
if (gst_gl_display_found (element, display))
|
||||
return TRUE;
|
||||
|
||||
gst_gl_display_context_prepare (element, display_ptr);
|
||||
|
||||
/* Neighbour found and it updated the display */
|
||||
if (gst_gl_display_found (element, *display_ptr))
|
||||
return TRUE;
|
||||
|
||||
/* If no neighboor, or application not interested, use system default */
|
||||
display = gst_gl_display_new ();
|
||||
|
||||
*display_ptr = display;
|
||||
|
||||
gst_gl_display_context_propagate (element, display);
|
||||
|
||||
return display != NULL;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_gl_handle_set_context (GstElement * element, GstContext * context,
|
||||
GstGLDisplay ** display)
|
||||
{
|
||||
GstGLDisplay *replacement = NULL;
|
||||
const gchar *context_type;
|
||||
|
||||
g_return_val_if_fail (display, FALSE);
|
||||
|
||||
if (!context)
|
||||
return FALSE;
|
||||
|
||||
context_type = gst_context_get_context_type (context);
|
||||
|
||||
if (g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) {
|
||||
if (!gst_context_get_gl_display (context, &replacement)) {
|
||||
GST_WARNING_OBJECT (element, "Failed to get display from context");
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
if (replacement)
|
||||
gst_object_replace ((GstObject **) display, (GstObject *) replacement);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_gl_handle_context_query (GstElement * element, GstQuery * query,
|
||||
GstGLDisplay ** display)
|
||||
{
|
||||
gboolean res = FALSE;
|
||||
const gchar *context_type;
|
||||
GstContext *context, *old_context;
|
||||
|
||||
g_return_val_if_fail (element != NULL, FALSE);
|
||||
g_return_val_if_fail (query != NULL, FALSE);
|
||||
g_return_val_if_fail (display != NULL, FALSE);
|
||||
|
||||
gst_query_parse_context_type (query, &context_type);
|
||||
|
||||
if (g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) {
|
||||
|
||||
gst_query_parse_context (query, &old_context);
|
||||
|
||||
if (old_context)
|
||||
context = gst_context_copy (old_context);
|
||||
else
|
||||
context = gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE);
|
||||
|
||||
gst_context_set_gl_display (context, *display);
|
||||
gst_query_set_context (query, context);
|
||||
gst_context_unref (context);
|
||||
|
||||
res = *display != NULL;
|
||||
}
|
||||
|
||||
return res;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -102,4 +102,10 @@ gboolean gst_gl_context_check_framebuffer_status (GstGLContext * context);
|
|||
void gst_gl_context_set_error (GstGLContext * context, const char * format, ...);
|
||||
gchar *gst_gl_context_get_error (void);
|
||||
|
||||
gboolean gst_gl_ensure_display (gpointer element, GstGLDisplay **display_ptr);
|
||||
gboolean gst_gl_handle_set_context (GstElement * element, GstContext * context,
|
||||
GstGLDisplay ** display);
|
||||
gboolean gst_gl_handle_context_query (GstElement * element, GstQuery * query,
|
||||
GstGLDisplay ** display);
|
||||
|
||||
#endif /* __GST_GL_UTILS_H__ */
|
||||
|
|
|
|||
Loading…
Reference in a new issue