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gstreamer/gst/gl/gstglimagesink.c
Matthew Waters ab963a755d [898/906] glimagesink: add an other-context property 
Allows applications to provide us with an OpenGL context with which
to share with.
2014-03-15 18:37:07 +01:00

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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.
*
* <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 -v videotestsrc ! "video/x-raw-rgb" ! 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 -v videotestsrc ! "video/x-raw-yuv, format=(fourcc)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 -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-gl/tests/examples/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 "gstglimagesink.h"
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_get_gl_api (context) & GST_GL_API_OPENGL)
#define USING_OPENGL3(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL3)
#define USING_GLES(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES)
#define USING_GLES2(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES2)
#define USING_GLES3(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES3)
#if GST_GL_HAVE_GLES2
static void gst_glimage_sink_thread_init_redisplay (GstGLImageSink * gl_sink);
#endif
static void gst_glimage_sink_on_close (GstGLImageSink * gl_sink);
static void gst_glimage_sink_on_resize (const GstGLImageSink * gl_sink,
gint width, gint height);
static void gst_glimage_sink_on_draw (const 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 GstFlowReturn gst_glimage_sink_render (GstBaseSink * 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);
#if GST_GL_HAVE_GLES2
/* *INDENT-OFF* */
static const gchar *redisplay_vertex_shader_str_gles2 =
"attribute vec4 a_position; \n"
"attribute vec2 a_texCoord; \n"
"varying vec2 v_texCoord; \n"
"void main() \n"
"{ \n"
" gl_Position = a_position; \n"
" v_texCoord = a_texCoord; \n"
"} \n";
static const gchar *redisplay_fragment_shader_str_gles2 =
"precision mediump float; \n"
"varying vec2 v_texCoord; \n"
"uniform sampler2D s_texture; \n"
"void main() \n"
"{ \n"
" gl_FragColor = texture2D( s_texture, v_texCoord );\n"
"} \n";
/* *INDENT-ON* */
#endif
static GstStaticPadTemplate gst_glimage_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_GL_UPLOAD_FORMATS) "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
GST_GL_UPLOAD_FORMATS))
);
enum
{
ARG_0,
ARG_DISPLAY,
PROP_CLIENT_RESHAPE_CALLBACK,
PROP_CLIENT_DRAW_CALLBACK,
PROP_CLIENT_DATA,
PROP_FORCE_ASPECT_RATIO,
PROP_PIXEL_ASPECT_RATIO,
PROP_OTHER_CONTEXT
};
#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);
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;
GstElementClass *element_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) 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_CLIENT_RESHAPE_CALLBACK,
g_param_spec_pointer ("client-reshape-callback",
"Client reshape callback",
"Define a custom reshape callback in a client code",
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CLIENT_DRAW_CALLBACK,
g_param_spec_pointer ("client-draw-callback", "Client draw callback",
"Define a custom draw callback in a client code",
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CLIENT_DATA,
g_param_spec_pointer ("client-data", "Client data",
"Pass data to the draw and reshape callbacks",
G_PARAM_WRITABLE | 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", FALSE,
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, 0, 1,
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>");
g_object_class_install_property (gobject_class, PROP_OTHER_CONTEXT,
g_param_spec_object ("other-context",
"External OpenGL context",
"Give an external OpenGL context with which to share textures",
GST_GL_TYPE_CONTEXT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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_times = gst_glimage_sink_get_times;
gstbasesink_class->preroll = gst_glimage_sink_render;
gstbasesink_class->render = gst_glimage_sink_render;
gstbasesink_class->propose_allocation = gst_glimage_sink_propose_allocation;
gstbasesink_class->stop = gst_glimage_sink_stop;
}
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->clientReshapeCallback = NULL;
glimage_sink->clientDrawCallback = NULL;
glimage_sink->client_data = NULL;
glimage_sink->keep_aspect_ratio = FALSE;
glimage_sink->par_n = 0;
glimage_sink->par_d = 1;
glimage_sink->pool = NULL;
glimage_sink->redisplay_texture = 0;
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_CLIENT_RESHAPE_CALLBACK:
{
glimage_sink->clientReshapeCallback = g_value_get_pointer (value);
break;
}
case PROP_CLIENT_DRAW_CALLBACK:
{
glimage_sink->clientDrawCallback = g_value_get_pointer (value);
break;
}
case PROP_CLIENT_DATA:
{
glimage_sink->client_data = g_value_get_pointer (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_OTHER_CONTEXT:
{
if (glimage_sink->other_context)
gst_object_unref (glimage_sink->other_context);
glimage_sink->other_context = g_value_dup_object (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);
g_free (glimage_sink->display_name);
GST_DEBUG ("finalized");
}
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_OTHER_CONTEXT:
g_value_set_object (value, glimage_sink->other_context);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
_ensure_gl_setup (GstGLImageSink * gl_sink)
{
GError *error = NULL;
if (!gst_gl_ensure_display (gl_sink, &gl_sink->display))
return FALSE;
if (!gl_sink->context) {
gl_sink->context = gst_gl_context_new (gl_sink->display);
if (!gst_gl_context_create (gl_sink->context, gl_sink->other_context,
&error))
goto context_error;
}
if (!gl_sink->upload) {
gl_sink->upload = gst_gl_upload_new (gl_sink->context);
if (!gst_gl_upload_init_format (gl_sink->upload, gl_sink->info,
gl_sink->info))
goto upload_error;
}
return TRUE;
upload_error:
{
GST_ELEMENT_ERROR (gl_sink, RESOURCE, NOT_FOUND, ("Failed to init upload"),
(NULL));
return FALSE;
}
context_error:
{
GST_ELEMENT_ERROR (gl_sink, RESOURCE, NOT_FOUND, ("%s", error->message),
(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:
{
return gst_gl_handle_context_query ((GstElement *) glimage_sink, query,
&glimage_sink->display);
break;
}
default:
res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
break;
}
return res;
}
static void
gst_glimage_sink_cleanup_glthread (GstGLImageSink * gl_sink)
{
#if GST_GL_HAVE_GLES2
if (gl_sink->redisplay_shader) {
gst_object_unref (gl_sink->redisplay_shader);
gl_sink->redisplay_shader = NULL;
}
#endif
}
/*
* GstElement methods
*/
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;
}
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);
}
static GstStateChangeReturn
gst_glimage_sink_change_state (GstElement * element, GstStateChange transition)
{
GstGLImageSink *glimage_sink;
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GST_DEBUG ("change state");
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);
if (!glimage_sink->display) {
GstGLWindow *window;
GError *error = NULL;
if (!gst_gl_ensure_display (glimage_sink, &glimage_sink->display))
return GST_STATE_CHANGE_FAILURE;
glimage_sink->context = gst_gl_context_new (glimage_sink->display);
window = gst_gl_context_get_window (glimage_sink->context);
if (!glimage_sink->window_id && !glimage_sink->new_window_id)
gst_video_overlay_prepare_window_handle (GST_VIDEO_OVERLAY
(glimage_sink));
if (glimage_sink->window_id != glimage_sink->new_window_id) {
glimage_sink->window_id = glimage_sink->new_window_id;
gst_gl_window_set_window_handle (window, glimage_sink->window_id);
}
if (!gst_gl_context_create (glimage_sink->context,
glimage_sink->other_context, &error)) {
GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND, ("%s",
error->message), (NULL));
if (glimage_sink->display) {
gst_object_unref (glimage_sink->display);
glimage_sink->display = NULL;
}
gst_object_unref (glimage_sink->context);
gst_object_unref (window);
return GST_STATE_CHANGE_FAILURE;
}
/* setup callbacks */
gst_gl_window_set_resize_callback (window,
GST_GL_WINDOW_RESIZE_CB (gst_glimage_sink_on_resize),
gst_object_ref (glimage_sink), (GDestroyNotify) gst_object_unref);
gst_gl_window_set_draw_callback (window,
GST_GL_WINDOW_CB (gst_glimage_sink_on_draw),
gst_object_ref (glimage_sink), (GDestroyNotify) gst_object_unref);
gst_gl_window_set_close_callback (window,
GST_GL_WINDOW_CB (gst_glimage_sink_on_close),
gst_object_ref (glimage_sink), (GDestroyNotify) gst_object_unref);
gst_object_unref (window);
}
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;
GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
if (glimage_sink->upload) {
gst_object_unref (glimage_sink->upload);
glimage_sink->upload = NULL;
}
glimage_sink->window_id = 0;
//but do not reset glimage_sink->new_window_id
if (glimage_sink->pool) {
gst_buffer_pool_set_active (glimage_sink->pool, FALSE);
gst_object_unref (glimage_sink->pool);
glimage_sink->pool = NULL;
}
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;
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 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;
GstStructure *structure;
GstBufferPool *newpool, *oldpool;
GST_DEBUG ("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);
if (glimage_sink->tex_id)
gst_gl_context_del_texture (glimage_sink->context, &glimage_sink->tex_id);
//FIXME: this texture seems to be never deleted when going to STATE_NULL
gst_gl_context_gen_texture (glimage_sink->context, &glimage_sink->tex_id,
GST_VIDEO_INFO_FORMAT (&vinfo), width, height);
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;
newpool = gst_gl_buffer_pool_new (glimage_sink->context);
structure = gst_buffer_pool_get_config (newpool);
gst_buffer_pool_config_set_params (structure, caps, vinfo.size, 2, 0);
gst_buffer_pool_set_config (newpool, structure);
oldpool = glimage_sink->pool;
/* we don't activate the pool yet, this will be done by downstream after it
* has configured the pool. If downstream does not want our pool we will
* activate it when we render into it */
glimage_sink->pool = newpool;
/* unref the old sink */
if (oldpool) {
/* we don't deactivate, some elements might still be using it, it will
* be deactivated when the last ref is gone */
gst_object_unref (oldpool);
}
return TRUE;
}
static GstFlowReturn
gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
GstGLImageSink *glimage_sink;
guint tex_id;
GST_TRACE ("rendering buffer:%p", buf);
glimage_sink = GST_GLIMAGE_SINK (bsink);
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, &tex_id))
goto upload_failed;
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_TRACE ("redisplay texture:%u of size:%ux%u, window size:%ux%u", tex_id,
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 = tex_id;
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 (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;
}
gst_gl_upload_release_buffer (glimage_sink->upload);
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;
}
upload_failed:
{
GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
("%s", "Failed to upload format"), (NULL));
return FALSE;
}
}
static void
gst_glimage_sink_video_overlay_init (GstVideoOverlayInterface * iface)
{
iface->set_window_handle = gst_glimage_sink_set_window_handle;
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 gboolean
gst_glimage_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (bsink);
GstBufferPool *pool;
GstStructure *config;
GstCaps *caps;
guint size;
gboolean need_pool;
GstStructure *gl_context;
if (!_ensure_gl_setup (glimage_sink))
return FALSE;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
if ((pool = glimage_sink->pool))
gst_object_ref (pool);
if (pool != NULL) {
GstCaps *pcaps;
/* we had a pool, check caps */
GST_DEBUG_OBJECT (glimage_sink, "check existing pool caps");
config = gst_buffer_pool_get_config (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 (pool);
pool = NULL;
}
gst_structure_free (config);
}
if (pool == NULL && need_pool) {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
GST_DEBUG_OBJECT (glimage_sink, "create new pool");
pool = gst_gl_buffer_pool_new (glimage_sink->context);
/* the normal size of a frame */
size = info.size;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (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, pool, size, 2, 0);
/* we also support various metadata */
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
gst_object_unref (pool);
gl_context =
gst_structure_new ("GstVideoGLTextureUploadMeta", "gst.gl.GstGLContext",
GST_GL_TYPE_CONTEXT, glimage_sink->context, NULL);
gst_query_add_allocation_meta (query,
GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, gl_context);
gst_structure_free (gl_context);
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (bsink, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_DEBUG_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
config_failed:
{
GST_DEBUG_OBJECT (bsink, "failed setting config");
return FALSE;
}
}
#if GST_GL_HAVE_GLES2
/* Called in the gl thread */
static void
gst_glimage_sink_thread_init_redisplay (GstGLImageSink * gl_sink)
{
GError *error = NULL;
gl_sink->redisplay_shader = gst_gl_shader_new (gl_sink->context);
gst_gl_shader_set_vertex_source (gl_sink->redisplay_shader,
redisplay_vertex_shader_str_gles2);
gst_gl_shader_set_fragment_source (gl_sink->redisplay_shader,
redisplay_fragment_shader_str_gles2);
gst_gl_shader_compile (gl_sink->redisplay_shader, &error);
if (error) {
gst_gl_context_set_error (gl_sink->context, "%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_context_clear_shader (gl_sink->context);
} else {
gl_sink->redisplay_attr_position_loc =
gst_gl_shader_get_attribute_location (gl_sink->redisplay_shader,
"a_position");
gl_sink->redisplay_attr_texture_loc =
gst_gl_shader_get_attribute_location (gl_sink->redisplay_shader,
"a_texCoord");
}
}
#endif
static void
gst_glimage_sink_on_resize (const 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;
GST_TRACE ("GL Window resized to %ux%u", width, height);
/* check if a client reshape callback is registered */
if (gl_sink->clientReshapeCallback)
gl_sink->clientReshapeCallback (width, height, gl_sink->client_data);
/* default reshape */
else {
if (gl_sink->keep_aspect_ratio) {
GstVideoRectangle src, dst, result;
src.x = 0;
src.y = 0;
src.w = GST_VIDEO_INFO_WIDTH (&gl_sink->info);
src.h = GST_VIDEO_INFO_HEIGHT (&gl_sink->info);
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);
}
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (gl_sink->context)) {
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gluOrtho2D (0, width, 0, height);
gl->MatrixMode (GL_MODELVIEW);
}
#endif
}
}
static void
gst_glimage_sink_on_draw (const 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;
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);
/* 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);
/* check if a client draw callback is registered */
if (gl_sink->clientDrawCallback) {
gboolean doRedisplay =
gl_sink->clientDrawCallback (gl_sink->redisplay_texture,
GST_VIDEO_INFO_WIDTH (&gl_sink->info),
GST_VIDEO_INFO_HEIGHT (&gl_sink->info),
gl_sink->client_data);
if (doRedisplay)
gst_gl_window_draw_unlocked (window,
GST_VIDEO_INFO_WIDTH (&gl_sink->info),
GST_VIDEO_INFO_HEIGHT (&gl_sink->info));
}
/* default opengl scene */
else {
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (gl_sink->context)) {
GLfloat verts[8] = { 1.0f, 1.0f,
-1.0f, 1.0f,
-1.0f, -1.0f,
1.0f, -1.0f
};
GLfloat texcoords[8] = { 1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f
};
gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, gl_sink->redisplay_texture);
gl->EnableClientState (GL_VERTEX_ARRAY);
gl->EnableClientState (GL_TEXTURE_COORD_ARRAY);
gl->VertexPointer (2, GL_FLOAT, 0, &verts);
gl->TexCoordPointer (2, GL_FLOAT, 0, &texcoords);
gl->DrawArrays (GL_TRIANGLE_FAN, 0, 4);
gl->DisableClientState (GL_VERTEX_ARRAY);
gl->DisableClientState (GL_TEXTURE_COORD_ARRAY);
gl->Disable (GL_TEXTURE_2D);
}
#endif
#if GST_GL_HAVE_GLES2
if (USING_GLES2 (gl_sink->context)) {
const GLfloat vVertices[] = { 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
};
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
gl->Clear (GL_COLOR_BUFFER_BIT);
gst_gl_shader_use (gl_sink->redisplay_shader);
/* Load the vertex position */
gl->VertexAttribPointer (gl_sink->redisplay_attr_position_loc, 3,
GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), vVertices);
/* Load the texture coordinate */
gl->VertexAttribPointer (gl_sink->redisplay_attr_texture_loc, 2,
GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), &vVertices[3]);
gl->EnableVertexAttribArray (gl_sink->redisplay_attr_position_loc);
gl->EnableVertexAttribArray (gl_sink->redisplay_attr_texture_loc);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, gl_sink->redisplay_texture);
gst_gl_shader_set_uniform_1i (gl_sink->redisplay_shader, "s_texture", 0);
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
}
#endif
} /* 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)
{
gst_gl_context_set_error (gl_sink->context, "Output window was closed");
g_atomic_int_set (&gl_sink->to_quit, 1);
}
static gboolean
gst_glimage_sink_redisplay (GstGLImageSink * gl_sink)
{
GstGLWindow *window;
gboolean alive;
window = gst_gl_context_get_window (gl_sink->context);
if (window && gst_gl_window_is_running (window)) {
#if GST_GL_HAVE_GLES2
if (USING_GLES2 (gl_sink->context)) {
if (!gl_sink->redisplay_shader) {
gst_gl_window_send_message (window,
GST_GL_WINDOW_CB (gst_glimage_sink_thread_init_redisplay), gl_sink);
}
}
#endif
/* Drawing is asynchrone: gst_gl_window_draw is not blocking
* It means that it does not wait for stuff being executed in other threads
*/
gst_gl_window_draw (window, GST_VIDEO_SINK_WIDTH (gl_sink),
GST_VIDEO_SINK_HEIGHT (gl_sink));
}
alive = gst_gl_window_is_running (window);
gst_object_unref (window);
return alive;
}
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