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gstreamer/ext/gl/gstglimagesink.c

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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>
* Copyright (C) 2015 Matthew Waters <matthew@centricular.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"
#include "gstglsinkbin.h"
#if GST_GL_HAVE_PLATFORM_EGL
#include <gst/gl/egl/gsteglimagememory.h>
#endif
#include <gst/gl/gstglviewconvert.h>
GST_DEBUG_CATEGORY (gst_debug_glimage_sink);
#define GST_CAT_DEFAULT gst_debug_glimage_sink
#define DEFAULT_SHOW_PREROLL_FRAME TRUE
#define DEFAULT_HANDLE_EVENTS TRUE
#define DEFAULT_FORCE_ASPECT_RATIO TRUE
#define DEFAULT_IGNORE_ALPHA TRUE
#define DEFAULT_MULTIVIEW_MODE GST_VIDEO_MULTIVIEW_MODE_MONO
#define DEFAULT_MULTIVIEW_FLAGS GST_VIDEO_MULTIVIEW_FLAGS_NONE
#define DEFAULT_MULTIVIEW_DOWNMIX GST_GL_STEREO_DOWNMIX_ANAGLYPH_GREEN_MAGENTA_DUBOIS
typedef GstGLSinkBin GstGLImageSinkBin;
typedef GstGLSinkBinClass GstGLImageSinkBinClass;
G_DEFINE_TYPE (GstGLImageSinkBin, gst_gl_image_sink_bin, GST_TYPE_GL_SINK_BIN);
enum
{
PROP_BIN_0,
PROP_BIN_FORCE_ASPECT_RATIO,
PROP_BIN_PIXEL_ASPECT_RATIO,
PROP_BIN_HANDLE_EVENTS,
PROP_BIN_CONTEXT,
PROP_BIN_IGNORE_ALPHA,
PROP_BIN_SHOW_PREROLL_FRAME,
PROP_BIN_OUTPUT_MULTIVIEW_LAYOUT,
PROP_BIN_OUTPUT_MULTIVIEW_FLAGS,
PROP_BIN_OUTPUT_MULTIVIEW_DOWNMIX_MODE
};
enum
{
SIGNAL_BIN_0,
SIGNAL_BIN_CLIENT_DRAW,
SIGNAL_BIN_CLIENT_RESHAPE,
SIGNAL_BIN_LAST,
};
static guint gst_gl_image_sink_bin_signals[SIGNAL_BIN_LAST] = { 0 };
static void
gst_gl_image_sink_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * param_spec)
{
g_object_set_property (G_OBJECT (GST_GL_SINK_BIN (object)->sink),
param_spec->name, value);
}
static void
gst_gl_image_sink_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * param_spec)
{
g_object_get_property (G_OBJECT (GST_GL_SINK_BIN (object)->sink),
param_spec->name, value);
}
static gboolean
_on_client_reshape (GstGLImageSink * sink, GstGLContext * context,
guint width, guint height, gpointer data)
{
gboolean ret;
g_signal_emit (data, gst_gl_image_sink_bin_signals[SIGNAL_BIN_CLIENT_RESHAPE],
0, context, width, height, &ret);
return ret;
}
static gboolean
_on_client_draw (GstGLImageSink * sink, GstGLContext * context,
GstSample * sample, gpointer data)
{
gboolean ret;
g_signal_emit (data, gst_gl_image_sink_bin_signals[SIGNAL_BIN_CLIENT_DRAW], 0,
context, sample, &ret);
return ret;
}
static void
gst_gl_image_sink_bin_init (GstGLImageSinkBin * self)
{
GstGLImageSink *sink = g_object_new (GST_TYPE_GLIMAGE_SINK, NULL);
g_signal_connect (sink, "client-reshape", (GCallback) _on_client_reshape,
self);
g_signal_connect (sink, "client-draw", (GCallback) _on_client_draw, self);
gst_gl_sink_bin_finish_init_with_element (GST_GL_SINK_BIN (self),
GST_ELEMENT (sink));
}
static void
gst_gl_image_sink_bin_class_init (GstGLImageSinkBinClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = gst_gl_image_sink_bin_get_property;
gobject_class->set_property = gst_gl_image_sink_bin_set_property;
/* gl sink */
g_object_class_install_property (gobject_class, PROP_BIN_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio",
DEFAULT_FORCE_ASPECT_RATIO,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BIN_HANDLE_EVENTS,
g_param_spec_boolean ("handle-events", "Handle XEvents",
"When enabled, XEvents will be selected and handled",
DEFAULT_HANDLE_EVENTS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BIN_IGNORE_ALPHA,
g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
"When enabled, alpha will be ignored and converted to black",
DEFAULT_IGNORE_ALPHA, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BIN_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_BIN_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));
/* video sink */
g_object_class_install_property (gobject_class, PROP_BIN_SHOW_PREROLL_FRAME,
g_param_spec_boolean ("show-preroll-frame", "Show preroll frame",
"Whether to render video frames during preroll",
DEFAULT_SHOW_PREROLL_FRAME,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_BIN_OUTPUT_MULTIVIEW_LAYOUT,
g_param_spec_enum ("output-multiview-mode", "Output Multiview Mode",
"Choose output mode for multiview/3D video",
GST_TYPE_VIDEO_MULTIVIEW_MODE, DEFAULT_MULTIVIEW_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_BIN_OUTPUT_MULTIVIEW_FLAGS,
g_param_spec_flags ("output-multiview-flags", "Output Multiview Flags",
"Output multiview layout modifier flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGS, DEFAULT_MULTIVIEW_FLAGS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_BIN_OUTPUT_MULTIVIEW_DOWNMIX_MODE,
g_param_spec_enum ("output-multiview-downmix-mode",
"Mode for mono downmixed output",
"Output anaglyph type to generate when downmixing to mono",
GST_TYPE_GL_STEREO_DOWNMIX_MODE_TYPE, DEFAULT_MULTIVIEW_DOWNMIX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_gl_image_sink_bin_signals[SIGNAL_BIN_CLIENT_DRAW] =
g_signal_new ("client-draw", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
0, NULL, NULL, g_cclosure_marshal_generic, G_TYPE_BOOLEAN, 2,
GST_GL_TYPE_CONTEXT, GST_TYPE_SAMPLE);
gst_gl_image_sink_bin_signals[SIGNAL_BIN_CLIENT_RESHAPE] =
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);
}
#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_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_set_render_rectangle (GstVideoOverlay * overlay,
gint x, gint y, gint width, gint height);
static void gst_glimage_sink_handle_events (GstVideoOverlay * overlay,
gboolean handle_events);
static gboolean update_output_format (GstGLImageSink * glimage_sink);
#define GST_GL_SINK_CAPS \
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_GL_MEMORY, "RGBA")
#define GST_GL_SINK_OVERLAY_CAPS \
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_GL_MEMORY "," \
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, "RGBA")
static GstStaticPadTemplate gst_glimage_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_GL_SINK_CAPS ";" GST_GL_SINK_OVERLAY_CAPS));
enum
{
ARG_0,
ARG_DISPLAY,
PROP_FORCE_ASPECT_RATIO,
PROP_PIXEL_ASPECT_RATIO,
PROP_CONTEXT,
PROP_HANDLE_EVENTS,
PROP_IGNORE_ALPHA,
PROP_OUTPUT_MULTIVIEW_LAYOUT,
PROP_OUTPUT_MULTIVIEW_FLAGS,
PROP_OUTPUT_MULTIVIEW_DOWNMIX_MODE
};
enum
{
SIGNAL_0,
CLIENT_DRAW_SIGNAL,
CLIENT_RESHAPE_SIGNAL,
LAST_SIGNAL
};
static guint gst_glimage_sink_signals[LAST_SIGNAL] = { 0 };
static void
_display_size_to_stream_size (GstGLImageSink * gl_sink, gdouble x,
gdouble y, gdouble * stream_x, gdouble * stream_y)
{
gdouble stream_width, stream_height;
stream_width = (gdouble) GST_VIDEO_INFO_WIDTH (&gl_sink->out_info);
stream_height = (gdouble) GST_VIDEO_INFO_HEIGHT (&gl_sink->out_info);
/* from display coordinates to stream coordinates */
if (gl_sink->display_rect.w > 0)
*stream_x =
(x - gl_sink->display_rect.x) / gl_sink->display_rect.w * stream_width;
else
*stream_x = 0.;
/* clip to stream size */
if (*stream_x < 0.)
*stream_x = 0.;
if (*stream_x > GST_VIDEO_INFO_WIDTH (&gl_sink->out_info))
*stream_x = GST_VIDEO_INFO_WIDTH (&gl_sink->out_info);
/* same for y-axis */
if (gl_sink->display_rect.h > 0)
*stream_y =
(y - gl_sink->display_rect.y) / gl_sink->display_rect.h * stream_height;
else
*stream_y = 0.;
if (*stream_y < 0.)
*stream_y = 0.;
if (*stream_y > GST_VIDEO_INFO_HEIGHT (&gl_sink->out_info))
*stream_y = GST_VIDEO_INFO_HEIGHT (&gl_sink->out_info);
GST_TRACE ("transform %fx%f into %fx%f", x, y, *stream_x, *stream_y);
}
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;
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 != 0 && gst_structure_get_double (structure, "pointer_x", &x)
&& height != 0 && gst_structure_get_double (structure, "pointer_y", &y)) {
gdouble stream_x, stream_y;
_display_size_to_stream_size (sink, x, y, &stream_x, &stream_y);
gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
stream_x, "pointer_y", G_TYPE_DOUBLE, stream_y, 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, PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio",
"When enabled, scaling will respect original aspect ratio",
DEFAULT_FORCE_ASPECT_RATIO,
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",
DEFAULT_HANDLE_EVENTS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_IGNORE_ALPHA,
g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
"When enabled, alpha will be ignored and converted to black",
DEFAULT_IGNORE_ALPHA, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_MULTIVIEW_LAYOUT,
g_param_spec_enum ("output-multiview-mode",
"Output Multiview Mode",
"Choose output mode for multiview/3D video",
GST_TYPE_VIDEO_MULTIVIEW_MODE, DEFAULT_MULTIVIEW_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_MULTIVIEW_FLAGS,
g_param_spec_flags ("output-multiview-flags",
"Output Multiview Flags",
"Output multiview layout modifier flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGS, DEFAULT_MULTIVIEW_FLAGS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_OUTPUT_MULTIVIEW_DOWNMIX_MODE,
g_param_spec_enum ("output-multiview-downmix-mode",
"Mode for mono downmixed output",
"Output anaglyph type to generate when downmixing to mono",
GST_TYPE_GL_STEREO_DOWNMIX_MODE_TYPE, DEFAULT_MULTIVIEW_DOWNMIX,
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, 2, GST_GL_TYPE_CONTEXT, GST_TYPE_SAMPLE);
/**
* 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;
gstvideosink_class->show_frame =
GST_DEBUG_FUNCPTR (gst_glimage_sink_show_frame);
}
static void
gst_glimage_sink_init (GstGLImageSink * glimage_sink)
{
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->redisplay_texture = 0;
glimage_sink->handle_events = TRUE;
glimage_sink->ignore_alpha = TRUE;
glimage_sink->overlay_compositor = NULL;
glimage_sink->mview_output_mode = DEFAULT_MULTIVIEW_MODE;
glimage_sink->mview_output_flags = DEFAULT_MULTIVIEW_FLAGS;
glimage_sink->mview_downmix_mode = DEFAULT_MULTIVIEW_DOWNMIX;
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 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;
case PROP_OUTPUT_MULTIVIEW_LAYOUT:
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->mview_output_mode = g_value_get_enum (value);
glimage_sink->output_mode_changed = TRUE;
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
break;
case PROP_OUTPUT_MULTIVIEW_FLAGS:
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->mview_output_flags = g_value_get_flags (value);
glimage_sink->output_mode_changed = TRUE;
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
break;
case PROP_OUTPUT_MULTIVIEW_DOWNMIX_MODE:
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->mview_downmix_mode = g_value_get_enum (value);
glimage_sink->output_mode_changed = TRUE;
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
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);
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 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;
case PROP_OUTPUT_MULTIVIEW_LAYOUT:
g_value_set_enum (value, glimage_sink->mview_output_mode);
break;
case PROP_OUTPUT_MULTIVIEW_FLAGS:
g_value_set_flags (value, glimage_sink->mview_output_flags);
break;
case PROP_OUTPUT_MULTIVIEW_DOWNMIX_MODE:
g_value_set_enum (value, glimage_sink->mview_downmix_mode);
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_TRACE_OBJECT (gl_sink, "Ensuring setup");
if (!gl_sink->context) {
GST_OBJECT_LOCK (gl_sink->display);
do {
GstGLContext *other_context = NULL;
GstGLWindow *window = NULL;
if (gl_sink->context) {
gst_object_unref (gl_sink->context);
gl_sink->context = NULL;
}
GST_DEBUG_OBJECT (gl_sink,
"No current context, creating one for %" GST_PTR_FORMAT,
gl_sink->display);
if (gl_sink->other_context) {
other_context = gst_object_ref (gl_sink->other_context);
} else {
other_context =
gst_gl_display_get_gl_context_for_thread (gl_sink->display, NULL);
}
if (!gst_gl_display_create_context (gl_sink->display,
other_context, &gl_sink->context, &error)) {
if (other_context)
gst_object_unref (other_context);
GST_OBJECT_UNLOCK (gl_sink->display);
goto context_error;
}
GST_DEBUG_OBJECT (gl_sink,
"created context %" GST_PTR_FORMAT " from other context %"
GST_PTR_FORMAT, gl_sink->context, gl_sink->other_context);
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_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);
if (gl_sink->x >= 0 && gl_sink->y >= 0 && gl_sink->width > 0 &&
gl_sink->height > 0) {
gst_gl_window_set_render_rectangle (window, gl_sink->x, gl_sink->y,
gl_sink->width, gl_sink->height);
}
if (other_context)
gst_object_unref (other_context);
gst_object_unref (window);
} while (!gst_gl_display_add_context (gl_sink->display, gl_sink->context));
GST_OBJECT_UNLOCK (gl_sink->display);
} else
GST_TRACE_OBJECT (gl_sink, "Already have a context");
return TRUE;
context_error:
{
GST_ELEMENT_ERROR (gl_sink, RESOURCE, NOT_FOUND, ("%s", error->message),
(NULL));
if (gl_sink->context) {
gst_object_unref (gl_sink->context);
gl_sink->context = NULL;
}
g_clear_error (&error);
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:
{
const gchar *context_type;
GstContext *context, *old_context;
res = 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);
gst_query_parse_context_type (query, &context_type);
if (g_strcmp0 (context_type, "gst.gl.local_context") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.gl.local_context", FALSE);
s = gst_context_writable_structure (context);
gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT,
glimage_sink->context, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
res = glimage_sink->context != NULL;
}
GST_LOG_OBJECT (glimage_sink, "context query of type %s %i", context_type,
res);
if (res)
return res;
break;
}
case GST_QUERY_DRAIN:
{
GstBuffer *buf[2];
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->redisplay_texture = 0;
buf[0] = glimage_sink->stored_buffer[0];
buf[1] = glimage_sink->stored_buffer[1];
glimage_sink->stored_buffer[0] = glimage_sink->stored_buffer[1] = NULL;
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
gst_buffer_replace (buf, NULL);
gst_buffer_replace (buf + 1, NULL);
gst_buffer_replace (&glimage_sink->input_buffer, NULL);
gst_buffer_replace (&glimage_sink->input_buffer2, NULL);
gst_buffer_replace (&glimage_sink->next_buffer, NULL);
gst_buffer_replace (&glimage_sink->next_buffer2, NULL);
gst_buffer_replace (&glimage_sink->next_sync, NULL);
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 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);
GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
}
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:
if (!gst_gl_ensure_element_data (glimage_sink, &glimage_sink->display,
&glimage_sink->other_context))
return GST_STATE_CHANGE_FAILURE;
gst_gl_display_filter_gl_api (glimage_sink->display, SUPPORTED_GL_APIS);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (!_ensure_gl_setup (glimage_sink))
return GST_STATE_CHANGE_FAILURE;
glimage_sink->overlay_compositor =
gst_gl_overlay_compositor_new (glimage_sink->context);
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:
{
GstBuffer *buf[2];
GST_GLIMAGE_SINK_LOCK (glimage_sink);
/* mark the redisplay_texture as unavailable (=0)
* to avoid drawing
*/
glimage_sink->redisplay_texture = 0;
buf[0] = glimage_sink->stored_buffer[0];
buf[1] = glimage_sink->stored_buffer[1];
glimage_sink->stored_buffer[0] = glimage_sink->stored_buffer[1] = NULL;
if (glimage_sink->stored_sync)
gst_buffer_unref (glimage_sink->stored_sync);
glimage_sink->stored_sync = NULL;
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
gst_buffer_replace (buf, NULL);
gst_buffer_replace (buf + 1, NULL);
gst_object_replace ((GstObject **) & glimage_sink->convert_views, NULL);
gst_buffer_replace (&glimage_sink->input_buffer, NULL);
gst_buffer_replace (&glimage_sink->input_buffer2, NULL);
gst_buffer_replace (&glimage_sink->next_buffer, NULL);
gst_buffer_replace (&glimage_sink->next_buffer2, NULL);
gst_buffer_replace (&glimage_sink->next_sync, 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;
/* Clear cached caps */
if (glimage_sink->out_caps) {
gst_caps_unref (glimage_sink->out_caps);
glimage_sink->out_caps = NULL;
}
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);
if (glimage_sink->key_sig_id)
g_signal_handler_disconnect (window, glimage_sink->key_sig_id);
glimage_sink->key_sig_id = 0;
if (glimage_sink->mouse_sig_id)
g_signal_handler_disconnect (window, glimage_sink->mouse_sig_id);
glimage_sink->mouse_sig_id = 0;
gst_object_unref (glimage_sink->overlay_compositor);
glimage_sink->overlay_compositor = NULL;
gst_object_unref (window);
gst_object_unref (glimage_sink->context);
glimage_sink->context = NULL;
}
break;
}
case GST_STATE_CHANGE_READY_TO_NULL:
if (glimage_sink->other_context) {
gst_object_unref (glimage_sink->other_context);
glimage_sink->other_context = NULL;
}
if (glimage_sink->display) {
gst_object_unref (glimage_sink->display);
glimage_sink->display = 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->out_info) > 0) {
*end = *start +
gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&glimagesink->out_info),
GST_VIDEO_INFO_FPS_N (&glimagesink->out_info));
}
}
}
}
static GstCaps *
gst_glimage_sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
{
GstCaps *tmp = NULL;
GstCaps *result = NULL;
tmp = gst_pad_get_pad_template_caps (GST_BASE_SINK_PAD (bsink));
if (filter) {
GST_DEBUG_OBJECT (bsink, "intersecting with filter caps %" GST_PTR_FORMAT,
filter);
result = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (tmp);
} else {
result = tmp;
}
result = gst_gl_overlay_compositor_add_caps (result);
GST_DEBUG_OBJECT (bsink, "returning caps: %" GST_PTR_FORMAT, result);
return result;
}
static gboolean
configure_display_from_info (GstGLImageSink * glimage_sink,
GstVideoInfo * vinfo)
{
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;
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));
return TRUE;
}
/* Called with GST_GLIMAGE_SINK lock held, to
* copy in_info to out_info and update out_caps */
static gboolean
update_output_format (GstGLImageSink * glimage_sink)
{
GstVideoInfo *out_info = &glimage_sink->out_info;
gboolean input_is_mono = FALSE;
GstVideoMultiviewMode mv_mode;
GstGLWindow *window = NULL;
gboolean ret;
*out_info = glimage_sink->in_info;
mv_mode = GST_VIDEO_INFO_MULTIVIEW_MODE (&glimage_sink->in_info);
if (mv_mode == GST_VIDEO_MULTIVIEW_MODE_NONE ||
mv_mode == GST_VIDEO_MULTIVIEW_MODE_MONO ||
mv_mode == GST_VIDEO_MULTIVIEW_MODE_LEFT ||
mv_mode == GST_VIDEO_MULTIVIEW_MODE_RIGHT)
input_is_mono = TRUE;
if (input_is_mono == FALSE &&
glimage_sink->mview_output_mode != GST_VIDEO_MULTIVIEW_MODE_NONE) {
/* Input is multiview, and output wants a conversion - configure 3d converter now,
* otherwise defer it until either the caps or the 3D output mode changes */
gst_video_multiview_video_info_change_mode (out_info,
glimage_sink->mview_output_mode, glimage_sink->mview_output_flags);
if (glimage_sink->convert_views == NULL) {
glimage_sink->convert_views = gst_gl_view_convert_new ();
gst_gl_view_convert_set_context (glimage_sink->convert_views,
glimage_sink->context);
}
} else {
if (glimage_sink->convert_views) {
gst_object_unref (glimage_sink->convert_views);
glimage_sink->convert_views = NULL;
}
}
ret = configure_display_from_info (glimage_sink, out_info);
if (glimage_sink->convert_views) {
/* Match actual output window size for pixel-aligned output,
* even though we can't necessarily match the starting left/right
* view parity properly */
glimage_sink->out_info.width = MAX (1, glimage_sink->display_rect.w);
glimage_sink->out_info.height = MAX (1, glimage_sink->display_rect.h);
GST_LOG_OBJECT (glimage_sink, "Set 3D output scale to %d,%d",
glimage_sink->display_rect.w, glimage_sink->display_rect.h);
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
gst_gl_view_convert_set_format (glimage_sink->convert_views,
&glimage_sink->in_info, &glimage_sink->out_info);
g_object_set (glimage_sink->convert_views, "downmix-mode",
glimage_sink->mview_downmix_mode, NULL);
GST_GLIMAGE_SINK_LOCK (glimage_sink);
}
glimage_sink->output_mode_changed = FALSE;
if (glimage_sink->context)
window = gst_gl_context_get_window (glimage_sink->context);
if (window) {
gst_gl_window_queue_resize (window);
gst_object_unref (window);
}
if (glimage_sink->out_caps)
gst_caps_unref (glimage_sink->out_caps);
glimage_sink->out_caps = gst_video_info_to_caps (out_info);
return ret;
}
static gboolean
gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstGLImageSink *glimage_sink;
gboolean ok;
GstVideoInfo vinfo;
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;
if (!_ensure_gl_setup (glimage_sink))
return FALSE;
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->in_info = vinfo;
ok = update_output_format (glimage_sink);
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
return ok;
}
/* Take the input_buffer and run it through 3D conversion if needed.
* Called with glimagesink lock, but might drop it temporarily */
static gboolean
prepare_next_buffer (GstGLImageSink * glimage_sink)
{
GstBuffer *in_buffer, *next_buffer, *old_buffer;
GstBuffer *in_buffer2 = NULL, *next_buffer2 = NULL, *old_buffer2;
GstBuffer *next_sync, *old_sync;
GstGLSyncMeta *sync_meta;
GstVideoFrame gl_frame;
GstGLViewConvert *convert_views = NULL;
GstVideoInfo *info;
if (glimage_sink->input_buffer == NULL)
return TRUE; /* No input buffer to process */
if (GST_VIDEO_INFO_MULTIVIEW_MODE (&glimage_sink->in_info) ==
GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME) {
if (glimage_sink->input_buffer2 == NULL)
return TRUE; /* Need 2nd input buffer to process */
in_buffer2 = gst_buffer_ref (glimage_sink->input_buffer2);
}
in_buffer = gst_buffer_ref (glimage_sink->input_buffer);
if (glimage_sink->convert_views &&
(GST_VIDEO_INFO_MULTIVIEW_MODE (&glimage_sink->in_info) !=
GST_VIDEO_INFO_MULTIVIEW_MODE (&glimage_sink->out_info) ||
GST_VIDEO_INFO_MULTIVIEW_FLAGS (&glimage_sink->in_info) !=
GST_VIDEO_INFO_MULTIVIEW_FLAGS (&glimage_sink->out_info)))
convert_views = gst_object_ref (glimage_sink->convert_views);
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
if (convert_views) {
info = &glimage_sink->out_info;
if (gst_gl_view_convert_submit_input_buffer (glimage_sink->convert_views,
GST_BUFFER_IS_DISCONT (in_buffer), in_buffer) != GST_FLOW_OK) {
gst_buffer_replace (&in_buffer2, NULL);
goto fail;
}
if (in_buffer2) {
if (gst_gl_view_convert_submit_input_buffer (glimage_sink->convert_views,
GST_BUFFER_IS_DISCONT (in_buffer2), in_buffer2) != GST_FLOW_OK) {
goto fail;
}
}
if (gst_gl_view_convert_get_output (glimage_sink->convert_views,
&next_buffer) != GST_FLOW_OK)
goto fail;
if (GST_VIDEO_INFO_MULTIVIEW_MODE (info) ==
GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME) {
if (gst_gl_view_convert_get_output (glimage_sink->convert_views,
&next_buffer2) != GST_FLOW_OK)
goto fail;
}
gst_object_unref (convert_views);
if (next_buffer == NULL) {
/* Not ready to paint a buffer yet */
GST_GLIMAGE_SINK_LOCK (glimage_sink);
return TRUE;
}
} else {
next_buffer = in_buffer;
info = &glimage_sink->in_info;
}
gst_gl_overlay_compositor_upload_overlays (glimage_sink->overlay_compositor,
next_buffer);
/* in_buffer invalid now */
if (!gst_video_frame_map (&gl_frame, info, next_buffer,
GST_MAP_READ | GST_MAP_GL)) {
gst_buffer_unref (next_buffer);
goto fail;
}
next_sync = gst_buffer_new ();
sync_meta = gst_buffer_add_gl_sync_meta (glimage_sink->context, next_sync);
gst_gl_sync_meta_set_sync_point (sync_meta, glimage_sink->context);
GST_GLIMAGE_SINK_LOCK (glimage_sink);
glimage_sink->next_tex = *(guint *) gl_frame.data[0];
old_buffer = glimage_sink->next_buffer;
glimage_sink->next_buffer = next_buffer;
old_buffer2 = glimage_sink->next_buffer2;
glimage_sink->next_buffer2 = next_buffer2;
old_sync = glimage_sink->next_sync;
glimage_sink->next_sync = next_sync;
/* Need to drop the lock again, to avoid a deadlock if we're
* dropping the last ref on this buffer and it goes back to our
* allocator */
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
if (old_buffer)
gst_buffer_unref (old_buffer);
if (old_buffer2)
gst_buffer_unref (old_buffer2);
if (old_sync)
gst_buffer_unref (old_sync);
gst_video_frame_unmap (&gl_frame);
GST_GLIMAGE_SINK_LOCK (glimage_sink);
return TRUE;
fail:
GST_GLIMAGE_SINK_LOCK (glimage_sink);
return FALSE;
}
static GstFlowReturn
gst_glimage_sink_prepare (GstBaseSink * bsink, GstBuffer * buf)
{
GstGLImageSink *glimage_sink;
GstBuffer **target;
GstBuffer *old_input;
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;
GST_GLIMAGE_SINK_LOCK (glimage_sink);
target = &glimage_sink->input_buffer;
if (GST_VIDEO_INFO_MULTIVIEW_MODE (&glimage_sink->in_info) ==
GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME &&
!GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_FIRST_IN_BUNDLE)) {
target = &glimage_sink->input_buffer2;
}
old_input = *target;
*target = gst_buffer_ref (buf);
if (glimage_sink->output_mode_changed)
update_output_format (glimage_sink);
if (!prepare_next_buffer (glimage_sink)) {
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
if (old_input)
gst_buffer_unref (old_input);
goto convert_views_failed;
}
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
if (old_input)
gst_buffer_unref (old_input);
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;
convert_views_failed:
{
GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
("%s", "Failed to convert multiview video buffer"), (NULL));
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_glimage_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
GstGLImageSink *glimage_sink;
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->out_info),
GST_VIDEO_INFO_HEIGHT (&glimage_sink->out_info),
GST_VIDEO_SINK_WIDTH (glimage_sink),
GST_VIDEO_SINK_HEIGHT (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 (g_atomic_int_get (&glimage_sink->to_quit) != 0) {
GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
/* ERRORS */
redisplay_failed:
{
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->set_render_rectangle = gst_glimage_sink_set_render_rectangle;
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 void
gst_glimage_sink_set_render_rectangle (GstVideoOverlay * overlay,
gint x, gint y, gint width, gint height)
{
GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (overlay);
if (G_LIKELY (glimage_sink->context)) {
GstGLWindow *window;
window = gst_gl_context_get_window (glimage_sink->context);
gst_gl_window_set_render_rectangle (window, x, y, width, height);
gst_object_unref (window);
}
glimage_sink->x = x;
glimage_sink->y = y;
glimage_sink->width = width;
glimage_sink->height = height;
}
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;
GstStructure *allocation_meta = NULL;
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) {
GstBufferPool *pool;
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
/* the normal size of a frame */
size = info.size;
GST_DEBUG_OBJECT (glimage_sink, "create new pool");
pool = gst_gl_buffer_pool_new (glimage_sink->context);
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_GL_SYNC_META);
if (!gst_buffer_pool_set_config (pool, config)) {
g_object_unref (pool);
goto config_failed;
}
/* we need at least 2 buffer because we hold on to the last one */
gst_query_add_allocation_pool (query, pool, size, 2, 0);
g_object_unref (pool);
}
if (glimage_sink->context->gl_vtable->FenceSync)
gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
if (glimage_sink->window_width != 0 && glimage_sink->window_height != 0) {
allocation_meta =
gst_structure_new ("GstVideoOverlayCompositionMeta",
"width", G_TYPE_UINT, glimage_sink->window_width,
"height", G_TYPE_UINT, glimage_sink->window_height, NULL);
GST_DEBUG ("sending alloc query with size %dx%d",
glimage_sink->window_width, glimage_sink->window_height);
}
gst_query_add_allocation_meta (query,
GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, allocation_meta);
if (allocation_meta)
gst_structure_free (allocation_meta);
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
};
static const GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
/* *INDENT-ON* */
static void
_bind_buffer (GstGLImageSink * gl_sink)
{
const GstGLFuncs *gl = gl_sink->context->gl_vtable;
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, gl_sink->vbo_indices);
gl->BindBuffer (GL_ARRAY_BUFFER, gl_sink->vertex_buffer);
/* 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_ELEMENT_ARRAY_BUFFER, 0);
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);
}
if (!gl_sink->vertex_buffer) {
gl->GenBuffers (1, &gl_sink->vertex_buffer);
gl->BindBuffer (GL_ARRAY_BUFFER, gl_sink->vertex_buffer);
gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
GL_STATIC_DRAW);
}
if (!gl_sink->vbo_indices) {
gl->GenBuffers (1, &gl_sink->vbo_indices);
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, gl_sink->vbo_indices);
gl->BufferData (GL_ELEMENT_ARRAY_BUFFER, sizeof (indices), indices,
GL_STATIC_DRAW);
}
if (gl->GenVertexArrays) {
_bind_buffer (gl_sink);
gl->BindVertexArray (0);
}
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
}
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;
}
if (gl_sink->vertex_buffer) {
gl->DeleteBuffers (1, &gl_sink->vertex_buffer);
gl_sink->vertex_buffer = 0;
}
if (gl_sink->vbo_indices) {
gl->DeleteBuffers (1, &gl_sink->vbo_indices);
gl_sink->vbo_indices = 0;
}
gst_gl_overlay_compositor_free_overlays (gl_sink->overlay_compositor);
}
/* Called with object lock held */
static void
gst_glimage_sink_on_resize (GstGLImageSink * gl_sink, gint width, gint height)
{
/* Here gl_sink members (ex:gl_sink->out_info) have a life time of set_caps.
* It means that they cannot change between two set_caps
*/
const GstGLFuncs *gl;
gboolean do_reshape;
gboolean reconfigure;
GST_DEBUG_OBJECT (gl_sink, "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);
GST_GLIMAGE_SINK_LOCK (gl_sink);
gl = gl_sink->context->gl_vtable;
width = MAX (1, width);
height = MAX (1, height);
/* Check if we would suggest a different width/height now */
reconfigure = ((gl_sink->window_width != width)
|| (gl_sink->window_height != height))
&& (gl_sink->window_width != 0)
&& (gl_sink->window_height != 0);
gl_sink->window_width = width;
gl_sink->window_height = height;
if (reconfigure) {
GST_DEBUG ("Sending reconfigure event on sinkpad.");
gst_pad_push_event (GST_BASE_SINK (gl_sink)->sinkpad,
gst_event_new_reconfigure ());
}
gst_gl_insert_debug_marker (gl_sink->context, "%s window resize to %ix%i",
GST_OBJECT_NAME (gl_sink), width, 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_sink->output_mode_changed |= (result.w != gl_sink->display_rect.w);
gl_sink->output_mode_changed |= (result.h != gl_sink->display_rect.h);
gl_sink->display_rect = result;
} else {
gl_sink->output_mode_changed |= (width != gl_sink->display_rect.w);
gl_sink->output_mode_changed |= (height != gl_sink->display_rect.h);
gl_sink->display_rect.x = 0;
gl_sink->display_rect.y = 0;
gl_sink->display_rect.w = width;
gl_sink->display_rect.h = height;
}
gl->Viewport (gl_sink->display_rect.x, gl_sink->display_rect.y,
gl_sink->display_rect.w, gl_sink->display_rect.h);
GST_DEBUG_OBJECT (gl_sink, "GL output area now %u,%u %ux%u",
gl_sink->display_rect.x, gl_sink->display_rect.y,
gl_sink->display_rect.w, gl_sink->display_rect.h);
}
GST_GLIMAGE_SINK_UNLOCK (gl_sink);
}
static void
gst_glimage_sink_on_draw (GstGLImageSink * gl_sink)
{
/* Here gl_sink members (ex:gl_sink->out_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 = FALSE;
GstGLSyncMeta *sync_meta = NULL;
GstSample *sample = NULL;
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_gl_insert_debug_marker (gl_sink->context, "%s element drawing texture %u",
GST_OBJECT_NAME (gl_sink), gl_sink->redisplay_texture);
GST_TRACE ("redrawing texture:%u", gl_sink->redisplay_texture);
sync_meta = gst_buffer_get_gl_sync_meta (gl_sink->stored_sync);
if (sync_meta)
gst_gl_sync_meta_wait (sync_meta, gst_gl_context_get_current ());
/* make sure that the environnement is clean */
gst_gl_context_clear_shader (gl_sink->context);
gl->BindTexture (GL_TEXTURE_2D, 0);
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (gl_sink->context))
gl->Disable (GL_TEXTURE_2D);
#endif
sample = gst_sample_new (gl_sink->stored_buffer[0],
gl_sink->out_caps, &GST_BASE_SINK (gl_sink)->segment, NULL);
g_signal_emit (gl_sink, gst_glimage_sink_signals[CLIENT_DRAW_SIGNAL], 0,
gl_sink->context, sample, &do_redisplay);
gst_sample_unref (sample);
if (gl_sink->stored_buffer[1]) {
sample = gst_sample_new (gl_sink->stored_buffer[1],
gl_sink->out_caps, &GST_BASE_SINK (gl_sink)->segment, NULL);
g_signal_emit (gl_sink, gst_glimage_sink_signals[CLIENT_DRAW_SIGNAL], 0,
gl_sink->context, sample, &do_redisplay);
gst_sample_unref (sample);
}
if (!do_redisplay) {
gfloat alpha = gl_sink->ignore_alpha ? 1.0f : 0.0f;
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, 0);
gst_gl_context_clear_shader (gl_sink->context);
if (gl->GenVertexArrays)
gl->BindVertexArray (0);
else
_unbind_buffer (gl_sink);
if (gl_sink->ignore_alpha)
gl->Disable (GL_BLEND);
gst_gl_overlay_compositor_draw_overlays (gl_sink->overlay_compositor);
}
/* 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);
if (gl_sink->key_sig_id)
g_signal_handler_disconnect (window, gl_sink->key_sig_id);
gl_sink->key_sig_id = 0;
if (gl_sink->mouse_sig_id)
g_signal_handler_disconnect (window, gl_sink->mouse_sig_id);
gl_sink->mouse_sig_id = 0;
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;
GstBuffer *old_stored_buffer[2], *old_sync;
window = gst_gl_context_get_window (gl_sink->context);
if (!window)
return FALSE;
if (gst_gl_window_is_running (window)) {
gulong handler_id =
g_signal_handler_find (GST_ELEMENT_PARENT (gl_sink), G_SIGNAL_MATCH_ID,
gst_gl_image_sink_bin_signals[SIGNAL_BIN_CLIENT_DRAW], 0,
NULL, NULL, NULL);
if (G_UNLIKELY (!gl_sink->redisplay_shader) && (!handler_id
|| !gl_sink->other_context)) {
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);
}
/* Recreate the output texture if needed */
GST_GLIMAGE_SINK_LOCK (gl_sink);
if (gl_sink->output_mode_changed && gl_sink->input_buffer != NULL) {
GST_DEBUG ("Recreating output after mode/size change");
update_output_format (gl_sink);
prepare_next_buffer (gl_sink);
}
if (gl_sink->next_buffer == NULL) {
/* Nothing to display yet */
GST_GLIMAGE_SINK_UNLOCK (gl_sink);
return TRUE;
}
/* Avoid to release the texture while drawing */
gl_sink->redisplay_texture = gl_sink->next_tex;
old_stored_buffer[0] = gl_sink->stored_buffer[0];
old_stored_buffer[1] = gl_sink->stored_buffer[1];
gl_sink->stored_buffer[0] = gst_buffer_ref (gl_sink->next_buffer);
if (gl_sink->next_buffer2)
gl_sink->stored_buffer[1] = gst_buffer_ref (gl_sink->next_buffer2);
else
gl_sink->stored_buffer[1] = NULL;
old_sync = gl_sink->stored_sync;
gl_sink->stored_sync = gst_buffer_ref (gl_sink->next_sync);
GST_GLIMAGE_SINK_UNLOCK (gl_sink);
gst_buffer_replace (old_stored_buffer, NULL);
gst_buffer_replace (old_stored_buffer + 1, NULL);
if (old_sync)
gst_buffer_unref (old_sync);
/* 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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