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gstreamer/ext/gl/gstglimagesink.c
Nicolas Dufresne bc92b41c7b glimagesink: Only cache pool, don't manage it 
GLImage does not use any kind of internal pool. There was some
remaining code and comment stating that it was managing the
pool, and it was in fact setting the active state when doing
to ready state.

* Only create the pool if requested and in propose_allocation
* Cache the pool to avoid reallocation on spurious reconfigure
* Don't try to deactivate the pool (we don't own it)

https://bugzilla.gnome.org/show_bug.cgi?id=745705
2017-12-09 19:31:56 +00:00

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/*
* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
* Copyright (C) 2005,2006,2007 David A. Schleef <ds@schleef.org>
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-glimagesink
*
* glimagesink renders video frames to a drawable on a local or remote
* display using OpenGL. This element can receive a Window ID from the
* application through the VideoOverlay interface and will then render video
* frames in this drawable.
* If no Window ID was provided by the application, the element will
* create its own internal window and render into it.
*
* See the #GstGLDisplay documentation for a list of environment variables that
* can override window/platform detection.
*
* <refsect2>
* <title>Scaling</title>
* <para>
* Depends on the driver, OpenGL handles hardware accelerated
* scaling of video frames. This means that the element will just accept
* incoming video frames no matter their geometry and will then put them to the
* drawable scaling them on the fly. Using the #GstGLImageSink:force-aspect-ratio
* property it is possible to enforce scaling with a constant aspect ratio,
* which means drawing black borders around the video frame.
* </para>
* </refsect2>
* <refsect2>
* <title>Events</title>
* <para>
* Through the gl thread, glimagesink handle some events coming from the drawable
* to manage its appearance even when the data is not flowing (GST_STATE_PAUSED).
* That means that even when the element is paused, it will receive expose events
* from the drawable and draw the latest frame with correct borders/aspect-ratio.
* </para>
* </refsect2>
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch-1.0 -v videotestsrc ! video/x-raw ! glimagesink
* ]| A pipeline to test hardware scaling.
* No special opengl extension is used in this pipeline, that's why it should work
* with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3.
* |[
* gst-launch-1.0 -v videotestsrc ! video/x-raw,format=I420 ! glimagesink
* ]| A pipeline to test hardware scaling and hardware colorspace conversion.
* When your driver supports GLSL (OpenGL Shading Language needs OpenGL >= 2.1),
* the 4 following format YUY2, UYVY, I420, YV12 and AYUV are converted to RGB32
* through some fragment shaders and using one framebuffer (FBO extension OpenGL >= 1.4).
* If your driver does not support GLSL but supports MESA_YCbCr extension then
* the you can use YUY2 and UYVY. In this case the colorspace conversion is automatically
* made when loading the texture and therefore no framebuffer is used.
* |[
* gst-launch-1.0 -v gltestsrc ! glimagesink
* ]| A pipeline 100% OpenGL.
* No special opengl extension is used in this pipeline, that's why it should work
* with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3.
* |[
* gst-plugins-bas/tests/examples/gl/generic/cube
* ]| The graphic FPS scene can be greater than the input video FPS.
* The graphic scene can be written from a client code through the
* two glfilterapp properties.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/video/videooverlay.h>
#include <gst/video/navigation.h>
#include "gstglimagesink.h"
#if GST_GL_HAVE_PLATFORM_EGL
#include <gst/gl/egl/gsteglimagememory.h>
#endif
GST_DEBUG_CATEGORY (gst_debug_glimage_sink);
#define GST_CAT_DEFAULT gst_debug_glimage_sink
#define GST_GLIMAGE_SINK_GET_LOCK(glsink) \
(GST_GLIMAGE_SINK(glsink)->drawing_lock)
#define GST_GLIMAGE_SINK_LOCK(glsink) \
(g_mutex_lock(&GST_GLIMAGE_SINK_GET_LOCK (glsink)))
#define GST_GLIMAGE_SINK_UNLOCK(glsink) \
(g_mutex_unlock(&GST_GLIMAGE_SINK_GET_LOCK (glsink)))
#define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
#define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
#define USING_GLES(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES, 1, 0))
#define USING_GLES2(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0))
#define USING_GLES3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0))
#define SUPPORTED_GL_APIS GST_GL_API_OPENGL | GST_GL_API_GLES2 | GST_GL_API_OPENGL3
static void gst_glimage_sink_thread_init_redisplay (GstGLImageSink * gl_sink);
static void gst_glimage_sink_cleanup_glthread (GstGLImageSink * gl_sink);
static void gst_glimage_sink_on_close (GstGLImageSink * gl_sink);
static void gst_glimage_sink_on_resize (GstGLImageSink * gl_sink,
gint width, gint height);
static void gst_glimage_sink_on_draw (GstGLImageSink * gl_sink);
static gboolean gst_glimage_sink_redisplay (GstGLImageSink * gl_sink);
static void gst_glimage_sink_finalize (GObject * object);
static void gst_glimage_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * param_spec);
static void gst_glimage_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * param_spec);
static gboolean gst_glimage_sink_stop (GstBaseSink * bsink);
static gboolean gst_glimage_sink_query (GstBaseSink * bsink, GstQuery * query);
static void gst_glimage_sink_set_context (GstElement * element,
GstContext * context);
static GstStateChangeReturn
gst_glimage_sink_change_state (GstElement * element, GstStateChange transition);
static void gst_glimage_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end);
static gboolean gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
static GstCaps *gst_glimage_sink_get_caps (GstBaseSink * bsink,
GstCaps * filter);
static GstFlowReturn gst_glimage_sink_prepare (GstBaseSink * bsink,
GstBuffer * buf);
static GstFlowReturn gst_glimage_sink_show_frame (GstVideoSink * bsink,
GstBuffer * buf);
static gboolean gst_glimage_sink_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
static void gst_glimage_sink_video_overlay_init (GstVideoOverlayInterface *
iface);
static void gst_glimage_sink_set_window_handle (GstVideoOverlay * overlay,
guintptr id);
static void gst_glimage_sink_expose (GstVideoOverlay * overlay);
static void
gst_glimage_sink_handle_events (GstVideoOverlay * overlay,
gboolean handle_events);
static GstStaticPadTemplate gst_glimage_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"RGBA") "; "
#if GST_GL_HAVE_PLATFORM_EGL
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_EGL_IMAGE, "RGBA") "; "
#endif
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
"RGBA") "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
);
enum
{
ARG_0,
ARG_DISPLAY,
PROP_FORCE_ASPECT_RATIO,
PROP_PIXEL_ASPECT_RATIO,
PROP_CONTEXT,
PROP_HANDLE_EVENTS,
PROP_IGNORE_ALPHA,
};
enum
{
SIGNAL_0,
CLIENT_DRAW_SIGNAL,
CLIENT_RESHAPE_SIGNAL,
LAST_SIGNAL
};
static guint gst_glimage_sink_signals[LAST_SIGNAL] = { 0 };
static void
gst_glimage_sink_navigation_send_event (GstNavigation * navigation, GstStructure
* structure)
{
GstGLImageSink *sink = GST_GLIMAGE_SINK (navigation);
GstEvent *event = NULL;
GstPad *pad = NULL;
GstGLWindow *window;
guint width, height;
gdouble x, y, xscale, yscale;
if (!sink->context)
return;
window = gst_gl_context_get_window (sink->context);
g_return_if_fail (GST_GL_IS_WINDOW (window));
width = GST_VIDEO_SINK_WIDTH (sink);
height = GST_VIDEO_SINK_HEIGHT (sink);
gst_gl_window_get_surface_dimensions (window, &width, &height);
event = gst_event_new_navigation (structure);
pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (sink));
/* Converting pointer coordinates to the non scaled geometry */
if (width != GST_VIDEO_SINK_WIDTH (sink) &&
width != 0 && gst_structure_get_double (structure, "pointer_x", &x)) {
xscale = (gdouble) GST_VIDEO_SINK_WIDTH (sink) / width;
gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
(gdouble) x * xscale, NULL);
}
if (height != GST_VIDEO_SINK_HEIGHT (sink) &&
height != 0 && gst_structure_get_double (structure, "pointer_y", &y)) {
yscale = (gdouble) GST_VIDEO_SINK_HEIGHT (sink) / height;
gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
(gdouble) y * yscale, NULL);
}
if (GST_IS_PAD (pad) && GST_IS_EVENT (event))
gst_pad_send_event (pad, event);
gst_object_unref (pad);
gst_object_unref (window);
}
static void
gst_glimage_sink_navigation_interface_init (GstNavigationInterface * iface)
{
iface->send_event = gst_glimage_sink_navigation_send_event;
}
#define gst_glimage_sink_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLImageSink, gst_glimage_sink,
GST_TYPE_VIDEO_SINK, G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY,
gst_glimage_sink_video_overlay_init);
G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION,
gst_glimage_sink_navigation_interface_init);
GST_DEBUG_CATEGORY_INIT (gst_debug_glimage_sink, "glimagesink", 0,
"OpenGL Video Sink"));
static void
gst_glimage_sink_class_init (GstGLImageSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
GstVideoSinkClass *gstvideosink_class;
GstElementClass *element_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gstvideosink_class = (GstVideoSinkClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_glimage_sink_set_property;
gobject_class->get_property = gst_glimage_sink_get_property;
g_object_class_install_property (gobject_class, ARG_DISPLAY,
g_param_spec_string ("display", "Display", "Display name",
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
"The pixel aspect ratio of the device", 0, 1, G_MAXINT, 1, 1, 1,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CONTEXT,
g_param_spec_object ("context",
"OpenGL context",
"Get OpenGL context",
GST_GL_TYPE_CONTEXT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_HANDLE_EVENTS,
g_param_spec_boolean ("handle-events", "Handle XEvents",
"When enabled, XEvents will be selected and handled", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_HANDLE_EVENTS,
g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
"When enabled, alpha will be ignored and converted to black", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_metadata (element_class, "OpenGL video sink",
"Sink/Video", "A videosink based on OpenGL",
"Julien Isorce <julien.isorce@gmail.com>");
/**
* GstGLImageSink::client-draw:
* @object: the #GstGLImageSink
* @texture: the #guint id of the texture.
* @width: the #guint width of the texture.
* @height: the #guint height of the texture.
*
* Will be emitted before actually drawing the texture. The client should
* redraw the surface/contents with the @texture, @width and @height and
* and return %TRUE.
*
* Returns: whether the texture was redrawn by the signal. If not, a
* default redraw will occur.
*/
gst_glimage_sink_signals[CLIENT_DRAW_SIGNAL] =
g_signal_new ("client-draw", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
G_TYPE_BOOLEAN, 4, GST_GL_TYPE_CONTEXT,
G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
/**
* GstGLImageSink::client-reshape:
* @object: the #GstGLImageSink
* @width: the #guint width of the texture.
* @height: the #guint height of the texture.
*
* The client should resize the surface/window/viewport with the @width and
* @height and return %TRUE.
*
* Returns: whether the content area was resized by the signal. If not, a
* default viewport resize will occur.
*/
gst_glimage_sink_signals[CLIENT_RESHAPE_SIGNAL] =
g_signal_new ("client-reshape", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
G_TYPE_BOOLEAN, 3, GST_GL_TYPE_CONTEXT, G_TYPE_UINT, G_TYPE_UINT);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_glimage_sink_template));
gobject_class->finalize = gst_glimage_sink_finalize;
gstelement_class->change_state = gst_glimage_sink_change_state;
gstelement_class->set_context = gst_glimage_sink_set_context;
gstbasesink_class->query = GST_DEBUG_FUNCPTR (gst_glimage_sink_query);
gstbasesink_class->set_caps = gst_glimage_sink_set_caps;
gstbasesink_class->get_caps = gst_glimage_sink_get_caps;
gstbasesink_class->get_times = gst_glimage_sink_get_times;
gstbasesink_class->prepare = gst_glimage_sink_prepare;
gstbasesink_class->propose_allocation = gst_glimage_sink_propose_allocation;
gstbasesink_class->stop = gst_glimage_sink_stop;
gstvideosink_class->show_frame =
GST_DEBUG_FUNCPTR (gst_glimage_sink_show_frame);
}
static void
gst_glimage_sink_init (GstGLImageSink * glimage_sink)
{
glimage_sink->display_name = NULL;
glimage_sink->window_id = 0;
glimage_sink->new_window_id = 0;
glimage_sink->display = NULL;
glimage_sink->keep_aspect_ratio = TRUE;
glimage_sink->par_n = 0;
glimage_sink->par_d = 1;
glimage_sink->pool = NULL;
glimage_sink->stored_buffer = NULL;
glimage_sink->redisplay_texture = 0;
glimage_sink->handle_events = TRUE;
glimage_sink->ignore_alpha = TRUE;
g_mutex_init (&glimage_sink->drawing_lock);
}
static void
gst_glimage_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGLImageSink *glimage_sink;
g_return_if_fail (GST_IS_GLIMAGE_SINK (object));
glimage_sink = GST_GLIMAGE_SINK (object);
switch (prop_id) {
case ARG_DISPLAY:
{
g_free (glimage_sink->display_name);
glimage_sink->display_name = g_strdup (g_value_get_string (value));
break;
}
case PROP_FORCE_ASPECT_RATIO:
{
glimage_sink->keep_aspect_ratio = g_value_get_boolean (value);
break;
}
case PROP_PIXEL_ASPECT_RATIO:
{
glimage_sink->par_n = gst_value_get_fraction_numerator (value);
glimage_sink->par_d = gst_value_get_fraction_denominator (value);
break;
}
case PROP_HANDLE_EVENTS:
gst_glimage_sink_handle_events (GST_VIDEO_OVERLAY (glimage_sink),
g_value_get_boolean (value));
break;
case PROP_IGNORE_ALPHA:
glimage_sink->ignore_alpha = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_glimage_sink_finalize (GObject * object)
{
GstGLImageSink *glimage_sink;
g_return_if_fail (GST_IS_GLIMAGE_SINK (object));
glimage_sink = GST_GLIMAGE_SINK (object);
g_mutex_clear (&glimage_sink->drawing_lock);
if (glimage_sink->other_context) {
gst_object_unref (glimage_sink->other_context);
glimage_sink->other_context = NULL;
}
g_free (glimage_sink->display_name);
GST_DEBUG ("finalized");
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_glimage_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLImageSink *glimage_sink;
g_return_if_fail (GST_IS_GLIMAGE_SINK (object));
glimage_sink = GST_GLIMAGE_SINK (object);
switch (prop_id) {
case ARG_DISPLAY:
g_value_set_string (value, glimage_sink->display_name);
break;
case PROP_FORCE_ASPECT_RATIO:
g_value_set_boolean (value, glimage_sink->keep_aspect_ratio);
break;
case PROP_PIXEL_ASPECT_RATIO:
gst_value_set_fraction (value, glimage_sink->par_n, glimage_sink->par_d);
break;
case PROP_CONTEXT:
g_value_set_object (value, glimage_sink->context);
break;
case PROP_HANDLE_EVENTS:
g_value_set_boolean (value, glimage_sink->handle_events);
break;
case PROP_IGNORE_ALPHA:
g_value_set_boolean (value, glimage_sink->ignore_alpha);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_glimage_sink_key_event_cb (GstGLWindow * window, char *event_name, char
*key_string, GstGLImageSink * gl_sink)
{
GST_DEBUG_OBJECT (gl_sink, "glimagesink event %s key %s pressed", event_name,
key_string);
gst_navigation_send_key_event (GST_NAVIGATION (gl_sink),
event_name, key_string);
}
static void
gst_glimage_sink_mouse_event_cb (GstGLWindow * window, char *event_name,
int button, double posx, double posy, GstGLImageSink * gl_sink)
{
GST_DEBUG_OBJECT (gl_sink, "glimagesink event %s at %g, %g", event_name, posx,
posy);
gst_navigation_send_mouse_event (GST_NAVIGATION (gl_sink),
event_name, button, posx, posy);
}
static gboolean
_ensure_gl_setup (GstGLImageSink * gl_sink)
{
GError *error = NULL;
GST_DEBUG_OBJECT (gl_sink, "Ensuring setup");
if (!gst_gl_ensure_element_data (gl_sink, &gl_sink->display,
&gl_sink->other_context))
return FALSE;
gst_gl_display_filter_gl_api (gl_sink->display, SUPPORTED_GL_APIS);
if (!gl_sink->context) {
GstGLWindow *window;
GST_DEBUG_OBJECT (gl_sink,
"No current context, creating one for %" GST_PTR_FORMAT,
gl_sink->display);
gl_sink->context = gst_gl_context_new (gl_sink->display);
if (!gl_sink->context)
goto context_creation_error;
window = gst_gl_context_get_window (gl_sink->context);
GST_DEBUG_OBJECT (gl_sink, "got window %" GST_PTR_FORMAT, window);
if (!gl_sink->window_id && !gl_sink->new_window_id)
gst_video_overlay_prepare_window_handle (GST_VIDEO_OVERLAY (gl_sink));
GST_DEBUG_OBJECT (gl_sink,
"window_id : %" G_GUINTPTR_FORMAT " , new_window_id : %"
G_GUINTPTR_FORMAT, gl_sink->window_id, gl_sink->new_window_id);
if (gl_sink->window_id != gl_sink->new_window_id) {
gl_sink->window_id = gl_sink->new_window_id;
GST_DEBUG_OBJECT (gl_sink, "Setting window handle on gl window");
gst_gl_window_set_window_handle (window, gl_sink->window_id);
}
GST_DEBUG_OBJECT (gl_sink,
"creating context %" GST_PTR_FORMAT " from other context %"
GST_PTR_FORMAT, gl_sink->context, gl_sink->other_context);
if (!gst_gl_context_create (gl_sink->context, gl_sink->other_context,
&error)) {
gst_object_unref (window);
goto context_error;
}
gst_gl_window_handle_events (window, gl_sink->handle_events);
/* setup callbacks */
gst_gl_window_set_resize_callback (window,
GST_GL_WINDOW_RESIZE_CB (gst_glimage_sink_on_resize),
gst_object_ref (gl_sink), (GDestroyNotify) gst_object_unref);
gst_gl_window_set_draw_callback (window,
GST_GL_WINDOW_CB (gst_glimage_sink_on_draw),
gst_object_ref (gl_sink), (GDestroyNotify) gst_object_unref);
gst_gl_window_set_close_callback (window,
GST_GL_WINDOW_CB (gst_glimage_sink_on_close),
gst_object_ref (gl_sink), (GDestroyNotify) gst_object_unref);
gl_sink->key_sig_id = g_signal_connect (window, "key-event", G_CALLBACK
(gst_glimage_sink_key_event_cb), gl_sink);
gl_sink->mouse_sig_id = g_signal_connect (window, "mouse-event", G_CALLBACK
(gst_glimage_sink_mouse_event_cb), gl_sink);
gst_object_unref (window);
} else
GST_DEBUG_OBJECT (gl_sink, "Already have a context");
return TRUE;
context_creation_error:
{
GST_ELEMENT_ERROR (gl_sink, RESOURCE, NOT_FOUND,
("Failed to create GL context"), (NULL));
return FALSE;
}
context_error:
{
GST_ELEMENT_ERROR (gl_sink, RESOURCE, NOT_FOUND, ("%s", error->message),
(NULL));
gst_object_unref (gl_sink->context);
gl_sink->context = NULL;
return FALSE;
}
}
static gboolean
gst_glimage_sink_query (GstBaseSink * bsink, GstQuery * query)
{
GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (bsink);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
gboolean ret =
gst_gl_handle_context_query ((GstElement *) glimage_sink, query,
&glimage_sink->display, &glimage_sink->other_context);
if (glimage_sink->display)
gst_gl_display_filter_gl_api (glimage_sink->display, SUPPORTED_GL_APIS);
return ret;
}
case GST_QUERY_DRAIN:
{
GstBuffer *buf = NULL;
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->redisplay_texture = 0;
buf = glimage_sink->stored_buffer;
glimage_sink->stored_buffer = NULL;
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
if (buf)
gst_buffer_unref (buf);
gst_buffer_replace (&glimage_sink->next_buffer, NULL);
gst_gl_upload_release_buffer (glimage_sink->upload);
res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
break;
}
default:
res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
break;
}
return res;
}
static gboolean
gst_glimage_sink_stop (GstBaseSink * bsink)
{
GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (bsink);
if (glimage_sink->pool) {
gst_object_unref (glimage_sink->pool);
glimage_sink->pool = NULL;
}
if (glimage_sink->gl_caps) {
gst_caps_unref (glimage_sink->gl_caps);
glimage_sink->gl_caps = NULL;
}
return TRUE;
}
static void
gst_glimage_sink_set_context (GstElement * element, GstContext * context)
{
GstGLImageSink *gl_sink = GST_GLIMAGE_SINK (element);
gst_gl_handle_set_context (element, context, &gl_sink->display,
&gl_sink->other_context);
if (gl_sink->display)
gst_gl_display_filter_gl_api (gl_sink->display, SUPPORTED_GL_APIS);
}
static GstStateChangeReturn
gst_glimage_sink_change_state (GstElement * element, GstStateChange transition)
{
GstGLImageSink *glimage_sink;
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GST_DEBUG ("changing state: %s => %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
glimage_sink = GST_GLIMAGE_SINK (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
g_atomic_int_set (&glimage_sink->to_quit, 0);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
{
/* mark the redisplay_texture as unavailable (=0)
* to avoid drawing
*/
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->redisplay_texture = 0;
if (glimage_sink->stored_buffer) {
gst_buffer_unref (glimage_sink->stored_buffer);
glimage_sink->stored_buffer = NULL;
}
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
gst_buffer_replace (&glimage_sink->next_buffer, NULL);
if (glimage_sink->upload) {
gst_object_unref (glimage_sink->upload);
glimage_sink->upload = NULL;
}
if (glimage_sink->convert) {
gst_object_unref (glimage_sink->convert);
glimage_sink->convert = NULL;
}
glimage_sink->window_id = 0;
/* but do not reset glimage_sink->new_window_id */
GST_VIDEO_SINK_WIDTH (glimage_sink) = 1;
GST_VIDEO_SINK_HEIGHT (glimage_sink) = 1;
if (glimage_sink->context) {
GstGLWindow *window = gst_gl_context_get_window (glimage_sink->context);
gst_gl_window_send_message (window,
GST_GL_WINDOW_CB (gst_glimage_sink_cleanup_glthread), glimage_sink);
gst_gl_window_set_resize_callback (window, NULL, NULL, NULL);
gst_gl_window_set_draw_callback (window, NULL, NULL, NULL);
gst_gl_window_set_close_callback (window, NULL, NULL, NULL);
gst_object_unref (window);
gst_object_unref (glimage_sink->context);
glimage_sink->context = NULL;
}
if (glimage_sink->display) {
gst_object_unref (glimage_sink->display);
glimage_sink->display = NULL;
}
break;
}
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static void
gst_glimage_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end)
{
GstGLImageSink *glimagesink;
glimagesink = GST_GLIMAGE_SINK (bsink);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
*start = GST_BUFFER_TIMESTAMP (buf);
if (GST_BUFFER_DURATION_IS_VALID (buf))
*end = *start + GST_BUFFER_DURATION (buf);
else {
if (GST_VIDEO_INFO_FPS_N (&glimagesink->info) > 0) {
*end = *start +
gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&glimagesink->info),
GST_VIDEO_INFO_FPS_N (&glimagesink->info));
}
}
}
}
static GstCaps *
gst_glimage_sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
{
GstGLImageSink *gl_sink = GST_GLIMAGE_SINK (bsink);
GstCaps *tmp = NULL;
GstCaps *result = NULL;
tmp = gst_caps_from_string ("video/x-raw(memory:GLMemory),format=RGBA");
result =
gst_gl_color_convert_transform_caps (gl_sink->context, GST_PAD_SRC, tmp,
NULL);
gst_caps_unref (tmp);
tmp = result;
GST_DEBUG_OBJECT (bsink, "convert returned caps %" GST_PTR_FORMAT, tmp);
result =
gst_gl_upload_transform_caps (gl_sink->context, GST_PAD_SRC, tmp, NULL);
gst_caps_unref (tmp);
tmp = result;
GST_DEBUG_OBJECT (bsink, "transfer returned caps %" GST_PTR_FORMAT, tmp);
if (filter) {
result = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (tmp);
} else {
result = tmp;
}
GST_DEBUG_OBJECT (bsink, "returning caps: %" GST_PTR_FORMAT, result);
return result;
}
static gboolean
gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstGLImageSink *glimage_sink;
gint width;
gint height;
gboolean ok;
gint par_n, par_d;
gint display_par_n, display_par_d;
guint display_ratio_num, display_ratio_den;
GstVideoInfo vinfo;
GstCapsFeatures *gl_features;
GstCaps *uploaded_caps;
GST_DEBUG_OBJECT (bsink, "set caps with %" GST_PTR_FORMAT, caps);
glimage_sink = GST_GLIMAGE_SINK (bsink);
ok = gst_video_info_from_caps (&vinfo, caps);
if (!ok)
return FALSE;
width = GST_VIDEO_INFO_WIDTH (&vinfo);
height = GST_VIDEO_INFO_HEIGHT (&vinfo);
par_n = GST_VIDEO_INFO_PAR_N (&vinfo);
par_d = GST_VIDEO_INFO_PAR_D (&vinfo);
if (!par_n)
par_n = 1;
/* get display's PAR */
if (glimage_sink->par_n != 0 && glimage_sink->par_d != 0) {
display_par_n = glimage_sink->par_n;
display_par_d = glimage_sink->par_d;
} else {
display_par_n = 1;
display_par_d = 1;
}
ok = gst_video_calculate_display_ratio (&display_ratio_num,
&display_ratio_den, width, height, par_n, par_d, display_par_n,
display_par_d);
if (!ok)
return FALSE;
GST_TRACE ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n,
display_par_d);
if (height % display_ratio_den == 0) {
GST_DEBUG ("keeping video height");
GST_VIDEO_SINK_WIDTH (glimage_sink) = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
GST_VIDEO_SINK_HEIGHT (glimage_sink) = height;
} else if (width % display_ratio_num == 0) {
GST_DEBUG ("keeping video width");
GST_VIDEO_SINK_WIDTH (glimage_sink) = width;
GST_VIDEO_SINK_HEIGHT (glimage_sink) = (guint)
gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
} else {
GST_DEBUG ("approximating while keeping video height");
GST_VIDEO_SINK_WIDTH (glimage_sink) = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
GST_VIDEO_SINK_HEIGHT (glimage_sink) = height;
}
GST_DEBUG ("scaling to %dx%d", GST_VIDEO_SINK_WIDTH (glimage_sink),
GST_VIDEO_SINK_HEIGHT (glimage_sink));
glimage_sink->info = vinfo;
if (!_ensure_gl_setup (glimage_sink))
return FALSE;
if (glimage_sink->upload)
gst_object_unref (glimage_sink->upload);
glimage_sink->upload = gst_gl_upload_new (glimage_sink->context);
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
uploaded_caps = gst_caps_copy (caps);
gst_caps_set_features (uploaded_caps, 0,
gst_caps_features_copy (gl_features));
gst_gl_upload_set_caps (glimage_sink->upload, caps, uploaded_caps);
if (glimage_sink->gl_caps)
gst_caps_unref (glimage_sink->gl_caps);
glimage_sink->gl_caps = gst_caps_copy (caps);
gst_caps_set_simple (glimage_sink->gl_caps, "format", G_TYPE_STRING, "RGBA",
NULL);
gst_caps_set_features (glimage_sink->gl_caps, 0,
gst_caps_features_copy (gl_features));
if (glimage_sink->convert)
gst_object_unref (glimage_sink->convert);
glimage_sink->convert = gst_gl_color_convert_new (glimage_sink->context);
if (!gst_gl_color_convert_set_caps (glimage_sink->convert, uploaded_caps,
glimage_sink->gl_caps)) {
gst_caps_unref (uploaded_caps);
gst_caps_features_free (gl_features);
return FALSE;
}
gst_caps_unref (uploaded_caps);
gst_caps_features_free (gl_features);
glimage_sink->caps_change = TRUE;
return TRUE;
}
static GstFlowReturn
gst_glimage_sink_prepare (GstBaseSink * bsink, GstBuffer * buf)
{
GstGLImageSink *glimage_sink;
GstBuffer *uploaded_buffer, *next_buffer = NULL;
GstVideoFrame gl_frame;
GstVideoInfo gl_info;
glimage_sink = GST_GLIMAGE_SINK (bsink);
GST_TRACE ("preparing buffer:%p", buf);
if (GST_VIDEO_SINK_WIDTH (glimage_sink) < 1 ||
GST_VIDEO_SINK_HEIGHT (glimage_sink) < 1) {
return GST_FLOW_NOT_NEGOTIATED;
}
if (!_ensure_gl_setup (glimage_sink))
return GST_FLOW_NOT_NEGOTIATED;
if (gst_gl_upload_perform_with_buffer (glimage_sink->upload, buf,
&uploaded_buffer) != GST_GL_UPLOAD_DONE)
goto upload_failed;
if (!(next_buffer =
gst_gl_color_convert_perform (glimage_sink->convert,
uploaded_buffer))) {
gst_buffer_unref (uploaded_buffer);
goto upload_failed;
}
gst_video_info_from_caps (&gl_info, glimage_sink->gl_caps);
if (!gst_video_frame_map (&gl_frame, &gl_info, next_buffer,
GST_MAP_READ | GST_MAP_GL)) {
gst_buffer_unref (uploaded_buffer);
gst_buffer_unref (next_buffer);
goto upload_failed;
}
gst_buffer_unref (uploaded_buffer);
glimage_sink->next_tex = *(guint *) gl_frame.data[0];
gst_buffer_replace (&glimage_sink->next_buffer, next_buffer);
gst_buffer_unref (next_buffer);
gst_video_frame_unmap (&gl_frame);
if (glimage_sink->window_id != glimage_sink->new_window_id) {
GstGLWindow *window = gst_gl_context_get_window (glimage_sink->context);
glimage_sink->window_id = glimage_sink->new_window_id;
gst_gl_window_set_window_handle (window, glimage_sink->window_id);
gst_object_unref (window);
}
return GST_FLOW_OK;
upload_failed:
{
GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
("%s", "Failed to upload buffer"), (NULL));
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_glimage_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
GstGLImageSink *glimage_sink;
GstBuffer *stored_buffer;
GST_TRACE ("rendering buffer:%p", buf);
glimage_sink = GST_GLIMAGE_SINK (vsink);
GST_TRACE ("redisplay texture:%u of size:%ux%u, window size:%ux%u",
glimage_sink->next_tex, GST_VIDEO_INFO_WIDTH (&glimage_sink->info),
GST_VIDEO_INFO_HEIGHT (&glimage_sink->info),
GST_VIDEO_SINK_WIDTH (glimage_sink),
GST_VIDEO_SINK_HEIGHT (glimage_sink));
/* Avoid to release the texture while drawing */
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->redisplay_texture = glimage_sink->next_tex;
stored_buffer = glimage_sink->stored_buffer;
glimage_sink->stored_buffer = gst_buffer_ref (glimage_sink->next_buffer);
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
/* Ask the underlying window to redraw its content */
if (!gst_glimage_sink_redisplay (glimage_sink))
goto redisplay_failed;
GST_TRACE ("post redisplay");
if (stored_buffer)
gst_buffer_unref (stored_buffer);
if (g_atomic_int_get (&glimage_sink->to_quit) != 0) {
GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
gst_gl_upload_release_buffer (glimage_sink->upload);
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
/* ERRORS */
redisplay_failed:
{
gst_gl_upload_release_buffer (glimage_sink->upload);
GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return GST_FLOW_ERROR;
}
}
static void
gst_glimage_sink_video_overlay_init (GstVideoOverlayInterface * iface)
{
iface->set_window_handle = gst_glimage_sink_set_window_handle;
iface->handle_events = gst_glimage_sink_handle_events;
iface->expose = gst_glimage_sink_expose;
}
static void
gst_glimage_sink_set_window_handle (GstVideoOverlay * overlay, guintptr id)
{
GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (overlay);
guintptr window_id = (guintptr) id;
g_return_if_fail (GST_IS_GLIMAGE_SINK (overlay));
GST_DEBUG ("set_xwindow_id %" G_GUINT64_FORMAT, (guint64) window_id);
glimage_sink->new_window_id = window_id;
}
static void
gst_glimage_sink_expose (GstVideoOverlay * overlay)
{
GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (overlay);
/* redisplay opengl scene */
if (glimage_sink->display && glimage_sink->window_id) {
if (glimage_sink->window_id != glimage_sink->new_window_id) {
GstGLWindow *window = gst_gl_context_get_window (glimage_sink->context);
glimage_sink->window_id = glimage_sink->new_window_id;
gst_gl_window_set_window_handle (window, glimage_sink->window_id);
gst_object_unref (window);
}
gst_glimage_sink_redisplay (glimage_sink);
}
}
static void
gst_glimage_sink_handle_events (GstVideoOverlay * overlay,
gboolean handle_events)
{
GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (overlay);
glimage_sink->handle_events = handle_events;
if (G_LIKELY (glimage_sink->context)) {
GstGLWindow *window;
window = gst_gl_context_get_window (glimage_sink->context);
gst_gl_window_handle_events (window, handle_events);
gst_object_unref (window);
}
}
static gboolean
gst_glimage_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (bsink);
GstStructure *config;
GstCaps *caps;
guint size;
gboolean need_pool;
if (!_ensure_gl_setup (glimage_sink))
return FALSE;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
if (need_pool) {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
/* the normal size of a frame */
size = info.size;
if (glimage_sink->pool) {
GstCaps *pcaps;
/* we had a pool, check caps */
GST_DEBUG_OBJECT (glimage_sink, "check existing pool caps");
config = gst_buffer_pool_get_config (glimage_sink->pool);
gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
if (!gst_caps_is_equal (caps, pcaps)) {
GST_DEBUG_OBJECT (glimage_sink, "pool has different caps");
/* different caps, we can't use this pool */
gst_object_unref (glimage_sink->pool);
glimage_sink->pool = NULL;
}
gst_structure_free (config);
}
if (glimage_sink->pool == NULL) {
GST_DEBUG_OBJECT (glimage_sink, "create new pool");
glimage_sink->pool = gst_gl_buffer_pool_new (glimage_sink->context);
config = gst_buffer_pool_get_config (glimage_sink->pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (glimage_sink->pool, config))
goto config_failed;
}
/* we need at least 2 buffer because we hold on to the last one */
gst_query_add_allocation_pool (query, glimage_sink->pool, size, 2, 0);
}
gst_gl_upload_propose_allocation (glimage_sink->upload, NULL, query);
if (glimage_sink->context->gl_vtable->FenceSync)
gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
return TRUE;
/* ERRORS */
no_caps:
{
GST_WARNING_OBJECT (bsink, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_WARNING_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
config_failed:
{
GST_WARNING_OBJECT (bsink, "failed setting config");
return FALSE;
}
}
/* *INDENT-OFF* */
static const GLfloat vertices[] = {
1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 0.0f, 0.0f, 0.0f,
-1.0f, -1.0f, 0.0f, 0.0f, 1.0f,
1.0f, -1.0f, 0.0f, 1.0f, 1.0f
};
/* *INDENT-ON* */
static void
_bind_buffer (GstGLImageSink * gl_sink)
{
const GstGLFuncs *gl = gl_sink->context->gl_vtable;
gl->BindBuffer (GL_ARRAY_BUFFER, gl_sink->vertex_buffer);
gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
GL_STATIC_DRAW);
/* Load the vertex position */
gl->VertexAttribPointer (gl_sink->attr_position, 3, GL_FLOAT, GL_FALSE,
5 * sizeof (GLfloat), (void *) 0);
/* Load the texture coordinate */
gl->VertexAttribPointer (gl_sink->attr_texture, 2, GL_FLOAT, GL_FALSE,
5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
gl->EnableVertexAttribArray (gl_sink->attr_position);
gl->EnableVertexAttribArray (gl_sink->attr_texture);
}
static void
_unbind_buffer (GstGLImageSink * gl_sink)
{
const GstGLFuncs *gl = gl_sink->context->gl_vtable;
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
gl->DisableVertexAttribArray (gl_sink->attr_position);
gl->DisableVertexAttribArray (gl_sink->attr_texture);
}
/* Called in the gl thread */
static void
gst_glimage_sink_thread_init_redisplay (GstGLImageSink * gl_sink)
{
const GstGLFuncs *gl = gl_sink->context->gl_vtable;
gl_sink->redisplay_shader = gst_gl_shader_new (gl_sink->context);
if (!gst_gl_shader_compile_with_default_vf_and_check
(gl_sink->redisplay_shader, &gl_sink->attr_position,
&gl_sink->attr_texture))
gst_glimage_sink_cleanup_glthread (gl_sink);
if (gl->GenVertexArrays) {
gl->GenVertexArrays (1, &gl_sink->vao);
gl->BindVertexArray (gl_sink->vao);
}
gl->GenBuffers (1, &gl_sink->vertex_buffer);
_bind_buffer (gl_sink);
if (gl->GenVertexArrays) {
gl->BindVertexArray (0);
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
} else {
_unbind_buffer (gl_sink);
}
}
static void
gst_glimage_sink_cleanup_glthread (GstGLImageSink * gl_sink)
{
const GstGLFuncs *gl = gl_sink->context->gl_vtable;
if (gl_sink->redisplay_shader) {
gst_object_unref (gl_sink->redisplay_shader);
gl_sink->redisplay_shader = NULL;
}
if (gl_sink->vao) {
gl->DeleteVertexArrays (1, &gl_sink->vao);
gl_sink->vao = 0;
}
}
static void
gst_glimage_sink_on_resize (GstGLImageSink * gl_sink, gint width, gint height)
{
/* Here gl_sink members (ex:gl_sink->info) have a life time of set_caps.
* It means that they cannot not change between two set_caps
*/
const GstGLFuncs *gl = gl_sink->context->gl_vtable;
gboolean do_reshape;
GST_TRACE ("GL Window resized to %ux%u", width, height);
/* check if a client reshape callback is registered */
g_signal_emit (gl_sink, gst_glimage_sink_signals[CLIENT_RESHAPE_SIGNAL], 0,
gl_sink->context, width, height, &do_reshape);
width = MAX (1, width);
height = MAX (1, height);
gl_sink->window_width = width;
gl_sink->window_height = height;
/* default reshape */
if (!do_reshape) {
if (gl_sink->keep_aspect_ratio) {
GstVideoRectangle src, dst, result;
src.x = 0;
src.y = 0;
src.w = GST_VIDEO_SINK_WIDTH (gl_sink);
src.h = GST_VIDEO_SINK_HEIGHT (gl_sink);
dst.x = 0;
dst.y = 0;
dst.w = width;
dst.h = height;
gst_video_sink_center_rect (src, dst, &result, TRUE);
gl->Viewport (result.x, result.y, result.w, result.h);
} else {
gl->Viewport (0, 0, width, height);
}
}
}
static void
gst_glimage_sink_on_draw (GstGLImageSink * gl_sink)
{
/* Here gl_sink members (ex:gl_sink->info) have a life time of set_caps.
* It means that they cannot not change between two set_caps as well as
* for the redisplay_texture size.
* Whereas redisplay_texture id changes every sink_render
*/
const GstGLFuncs *gl = NULL;
GstGLWindow *window = NULL;
gboolean do_redisplay;
GstGLSyncMeta *sync_meta;
g_return_if_fail (GST_IS_GLIMAGE_SINK (gl_sink));
gl = gl_sink->context->gl_vtable;
GST_GLIMAGE_SINK_LOCK (gl_sink);
/* check if texture is ready for being drawn */
if (!gl_sink->redisplay_texture) {
GST_GLIMAGE_SINK_UNLOCK (gl_sink);
return;
}
window = gst_gl_context_get_window (gl_sink->context);
window->is_drawing = TRUE;
/* opengl scene */
GST_TRACE ("redrawing texture:%u", gl_sink->redisplay_texture);
if (gl_sink->caps_change && gl_sink->window_width > 0
&& gl_sink->window_height > 0) {
GST_GLIMAGE_SINK_UNLOCK (gl_sink);
gst_glimage_sink_on_resize (gl_sink, gl_sink->window_width,
gl_sink->window_height);
GST_GLIMAGE_SINK_LOCK (gl_sink);
gl_sink->caps_change = FALSE;
}
sync_meta = gst_buffer_get_gl_sync_meta (gl_sink->stored_buffer);
if (sync_meta)
gst_gl_sync_meta_wait (sync_meta);
/* make sure that the environnement is clean */
gst_gl_context_clear_shader (gl_sink->context);
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (gl_sink->context))
gl->Disable (GL_TEXTURE_2D);
#endif
gl->BindTexture (GL_TEXTURE_2D, 0);
g_signal_emit (gl_sink, gst_glimage_sink_signals[CLIENT_DRAW_SIGNAL], 0,
gl_sink->context,
gl_sink->redisplay_texture, GST_VIDEO_INFO_WIDTH (&gl_sink->info),
GST_VIDEO_INFO_HEIGHT (&gl_sink->info), &do_redisplay);
if (!do_redisplay) {
gfloat alpha = gl_sink->ignore_alpha ? 1.0f : 0.0f;
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
gl->ClearColor (0.0, 0.0, 0.0, alpha);
gl->Clear (GL_COLOR_BUFFER_BIT);
if (gl_sink->ignore_alpha) {
gl->BlendColor (0.0, 0.0, 0.0, alpha);
gl->BlendFunc (GL_SRC_ALPHA, GL_CONSTANT_COLOR);
gl->BlendEquation (GL_FUNC_ADD);
gl->Enable (GL_BLEND);
}
gst_gl_shader_use (gl_sink->redisplay_shader);
if (gl->GenVertexArrays)
gl->BindVertexArray (gl_sink->vao);
else
_bind_buffer (gl_sink);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, gl_sink->redisplay_texture);
gst_gl_shader_set_uniform_1i (gl_sink->redisplay_shader, "tex", 0);
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
if (gl->GenVertexArrays)
gl->BindVertexArray (0);
else
_unbind_buffer (gl_sink);
if (gl_sink->ignore_alpha)
gl->Disable (GL_BLEND);
}
/* end default opengl scene */
window->is_drawing = FALSE;
gst_object_unref (window);
GST_GLIMAGE_SINK_UNLOCK (gl_sink);
}
static void
gst_glimage_sink_on_close (GstGLImageSink * gl_sink)
{
GstGLWindow *window;
gst_gl_context_set_error (gl_sink->context, "Output window was closed");
window = gst_gl_context_get_window (gl_sink->context);
g_signal_handler_disconnect (window, gl_sink->key_sig_id);
g_signal_handler_disconnect (window, gl_sink->mouse_sig_id);
g_atomic_int_set (&gl_sink->to_quit, 1);
gst_object_unref (window);
}
static gboolean
gst_glimage_sink_redisplay (GstGLImageSink * gl_sink)
{
GstGLWindow *window;
gboolean alive;
window = gst_gl_context_get_window (gl_sink->context);
if (!window)
return FALSE;
if (gst_gl_window_is_running (window)) {
if (G_UNLIKELY (!gl_sink->redisplay_shader)) {
gst_gl_window_send_message (window,
GST_GL_WINDOW_CB (gst_glimage_sink_thread_init_redisplay), gl_sink);
/* if the shader is still null it means it failed to be useable */
if (G_UNLIKELY (!gl_sink->redisplay_shader)) {
gst_object_unref (window);
return FALSE;
}
gst_gl_window_set_preferred_size (window, GST_VIDEO_SINK_WIDTH (gl_sink),
GST_VIDEO_SINK_HEIGHT (gl_sink));
gst_gl_window_show (window);
}
/* Drawing is asynchronous: gst_gl_window_draw is not blocking
* It means that it does not wait for stuff to be executed in other threads
*/
gst_gl_window_draw (window);
}
alive = gst_gl_window_is_running (window);
gst_object_unref (window);
return alive;
}
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