gstreamer/sys/glsink/gstglsink.c
Thomas Vander Stichele 4fd57bbe3f don't mix tabs and spaces
Original commit message from CVS:
don't mix tabs and spaces
2004-03-15 19:32:27 +00:00

773 lines
23 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
<ds-work> your element belongs to a scheduler, which calls some functions from the same thread
<ds-work> all the other functions could be called from any random thread
<gernot> ds-work: which are the "some" function in that case ?
<gernot> It is quite costly to do glXGetCurrentContext for every function call.
<ds-work> _chain, -get, _loop
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <GL/glx.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <sys/time.h>
/*#define GST_DEBUG_FORCE_DISABLE*/
#include "gstglsink.h"
/* elementfactory information */
static GstElementDetails gst_glsink_details = {
"OpenGL Sink/GLX",
"Sink/GLVideo",
"An OpenGL based video sink - uses OpenGL and GLX to draw video, utilizing different acceleration options",
"Gernot Ziegler <gz@lysator.liu.se>"
};
/* default template - initiated with class struct to allow gst-register to work
with X running */
GST_PAD_TEMPLATE_FACTORY (gst_glsink_sink_template_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW ("glsink_rgbsink", "video/x-raw-rgb",
"framerate", GST_PROPS_FLOAT_RANGE (0, G_MAXFLOAT),
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT)),
GST_CAPS_NEW ("glsink_yuvsink", "video/x-raw-yuv",
"framerate", GST_PROPS_FLOAT_RANGE (0, G_MAXFLOAT),
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT))
)
/* glsink signals and args */
enum
{
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_WIDTH,
ARG_HEIGHT,
ARG_FRAMES_DISPLAYED,
ARG_FRAME_TIME,
ARG_HOOK,
ARG_MUTE,
ARG_REPAINT,
ARG_DEMO,
ARG_DUMP
};
/* GLsink class */
#define GST_TYPE_GLSINK (gst_glsink_get_type())
#define GST_GLSINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_GLSINK,GstGLSink))
#define GST_GLSINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_GLSINK,GstGLSink))
#define GST_IS_GLSINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_GLSINK))
#define GST_IS_GLSINK_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_GLSINK))
typedef struct _GstGLSink GstGLSink;
typedef struct _GstGLSinkClass GstGLSinkClass;
struct _GstGLSink
{
GstElement element;
GstPad *sinkpad;
gint frames_displayed;
guint64 frame_time;
gint width, height;
gboolean muted;
gint demo; // some kind of fun demo mode to let GL show its 3D capabilities
gboolean dumpvideo; // dump the video down to .ppm:s
GstBuffer *last_image; /* not thread safe ? */
GstClock *clock;
GMutex *cache_lock;
GList *cache;
/* plugins */
GstImagePlugin *plugin;
GstImageConnection *conn;
/* allow anybody to hook in here */
GstImageInfo *hook;
};
struct _GstGLSinkClass
{
GstElementClass parent_class;
/* plugins */
GList *plugins;
};
static GType gst_glsink_get_type (void);
static void gst_glsink_base_init (gpointer g_class);
static void gst_glsink_class_init (GstGLSinkClass * klass);
static void gst_glsink_init (GstGLSink * sink);
/* static void gst_glsink_dispose (GObject *object); */
static void gst_glsink_chain (GstPad * pad, GstData * _data);
static void gst_glsink_set_clock (GstElement * element, GstClock * clock);
static GstElementStateReturn gst_glsink_change_state (GstElement *
element);
static GstPadLinkReturn gst_glsink_sinkconnect (GstPad * pad,
GstCaps * caps);
static GstCaps *gst_glsink_getcaps (GstPad * pad, GstCaps * caps);
static void gst_glsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_glsink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_glsink_release_conn (GstGLSink * sink);
static void gst_glsink_append_cache (GstGLSink * sink,
GstImageData * image);
static gboolean gst_glsink_set_caps (GstGLSink * sink, GstCaps * caps);
/* prototypes from plugins */
extern GstImagePlugin *get_gl_rgbimage_plugin (void);
extern GstImagePlugin *get_gl_nvimage_plugin (void);
/* default output */
extern void gst_glxwindow_new (GstGLSink * sink);
extern void gst_glxwindow_hook_context (GstImageInfo * info);
extern void gst_glxwindow_unhook_context (GstImageInfo * info);
static GstPadTemplate *sink_template;
static GstElementClass *parent_class = NULL;
/* static guint gst_glsink_signals[LAST_SIGNAL] = { 0 }; */
static GType gst_glsink_get_type (void)
{
static GType videosink_type = 0;
if (!videosink_type) {
static const GTypeInfo videosink_info = {
sizeof (GstGLSinkClass),
gst_glsink_base_init,
NULL,
(GClassInitFunc) gst_glsink_class_init,
NULL,
NULL,
sizeof (GstGLSink),
0,
(GInstanceInitFunc) gst_glsink_init,
};
videosink_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstGLSink", &videosink_info,
0);
}
return videosink_type;
}
static void
gst_glsink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_glsink_details);
gst_element_class_add_pad_template (element_class,
GST_PAD_TEMPLATE_GET (gst_glsink_sink_template_factory));
}
static void
gst_glsink_class_init (GstGLSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (gobject_class, ARG_WIDTH, g_param_spec_int ("width", "Width", "The video width", G_MININT, G_MAXINT, 0, G_PARAM_READABLE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_HEIGHT, g_param_spec_int ("height", "Height", "The video height", G_MININT, G_MAXINT, 0, G_PARAM_READABLE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_FRAMES_DISPLAYED, g_param_spec_int ("frames_displayed", "Frames Displayed", "The number of frames displayed so far", G_MININT, G_MAXINT, 0, G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_FRAME_TIME, g_param_spec_int ("frame_time", "Frame time", "The interval between frames", G_MININT, G_MAXINT, 0, G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_HOOK,
g_param_spec_pointer ("hook", "Hook", "The object receiving the output",
G_PARAM_WRITABLE));
g_object_class_install_property (gobject_class, ARG_MUTE,
g_param_spec_boolean ("mute", "Mute", "mute the output ?", FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_REPAINT,
g_param_spec_boolean ("repaint", "Repaint", "repaint the current frame",
FALSE, G_PARAM_WRITABLE));
g_object_class_install_property (gobject_class, ARG_DEMO,
g_param_spec_int ("demo", "Demo", "demo mode (shows 3D capabilities)", 0,
1, 0, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_DUMP,
g_param_spec_boolean ("dump", "Dump",
"stores sequence of frames in .ppm files", FALSE, G_PARAM_READWRITE));
gobject_class->set_property = gst_glsink_set_property;
gobject_class->get_property = gst_glsink_get_property;
/*gobject_class->dispose = gst_glsink_dispose; */
gstelement_class->change_state = gst_glsink_change_state;
gstelement_class->set_clock = gst_glsink_set_clock;
/* plugins */
klass->plugins = NULL;
klass->plugins = g_list_append (klass->plugins, get_gl_rgbimage_plugin ());
klass->plugins = g_list_append (klass->plugins, get_gl_nvimage_plugin ());
}
/*
GLSink has its own Buffer management - this allows special plugins to create special memory areas for
buffer upload
*/
static void
gst_glsink_init (GstGLSink * sink)
{
sink->sinkpad = gst_pad_new_from_template (sink_template, "sink");
gst_element_add_pad (GST_ELEMENT (sink), sink->sinkpad);
gst_pad_set_chain_function (sink->sinkpad, gst_glsink_chain);
gst_pad_set_link_function (sink->sinkpad, gst_glsink_sinkconnect);
gst_pad_set_getcaps_function (sink->sinkpad, gst_glsink_getcaps);
gst_pad_set_bufferpool_function (sink->sinkpad, gst_glsink_get_bufferpool);
sink->last_image = NULL;
sink->width = 0;
sink->height = 0;
sink->muted = FALSE;
sink->clock = NULL;
GST_FLAG_SET (sink, GST_ELEMENT_THREAD_SUGGESTED);
GST_FLAG_SET (sink, GST_ELEMENT_EVENT_AWARE);
/* create bufferpool and image cache */
GST_DEBUG ("glsink: creating bufferpool");
sink->cache_lock = g_mutex_new ();
sink->cache = NULL;
/* plugins */
sink->plugin = NULL;
sink->conn = NULL;
/* do initialization of default hook here */
gst_glxwindow_new (sink);
//printf("GLSink_init: Current context %p\n", glXGetCurrentContext());
gst_glxwindow_unhook_context (sink->hook);
}
/** frees the temporary connection that tests the window system capabilities */
static void
gst_glsink_release_conn (GstGLSink * sink)
{
if (sink->conn == NULL)
return;
/* free last image if any */
if (sink->last_image != NULL) {
gst_buffer_unref (sink->last_image);
sink->last_image = NULL;
}
/* free cache */
g_mutex_lock (sink->cache_lock);
while (sink->cache) {
sink->plugin->free_image ((GstImageData *) sink->cache->data);
sink->cache = g_list_delete_link (sink->cache, sink->cache);
}
g_mutex_unlock (sink->cache_lock);
/* release connection */
sink->conn->free_conn (sink->conn);
sink->conn = NULL;
}
static void
gst_glsink_append_cache (GstGLSink * sink, GstImageData * image)
{
g_mutex_lock (sink->cache_lock);
sink->cache = g_list_prepend (sink->cache, image);
g_mutex_unlock (sink->cache_lock);
}
#if 0
/*
Create a new buffer to hand up the chain.
This allows the plugins to make its own decoding buffers
*/
static GstBuffer *
gst_glsink_buffer_new (GstBufferPool * pool, gint64 location,
guint size, gpointer user_data)
{
GstGLSink *sink;
GstBuffer *buffer;
GstImageData *image;
sink = GST_GLSINK (user_data);
/* If cache is non-empty, get buffer from there */
if (sink->cache != NULL) {
g_mutex_lock (sink->cache_lock);
image = (GstImageData *) sink->cache->data;
sink->cache = g_list_delete_link (sink->cache, sink->cache);
g_mutex_unlock (sink->cache_lock);
} else {
/* otherwise, get one from the plugin */
image = sink->plugin->get_image (sink->hook, sink->conn);
}
buffer = gst_buffer_new ();
GST_BUFFER_DATA (buffer) = image->data;
GST_BUFFER_SIZE (buffer) = image->size;
GST_BUFFER_POOL_PRIVATE (buffer) = image;
return buffer;
}
/*
Free a buffer that the chain doesn't need anymore.
*/
static void
gst_glsink_buffer_free (GstBufferPool * pool, GstBuffer * buffer,
gpointer user_data)
{
GstGLSink *sink =
GST_GLSINK (gst_buffer_pool_get_user_data (GST_BUFFER_BUFFERPOOL
(buffer)));
gst_glsink_append_cache (sink,
(GstImageData *) GST_BUFFER_POOL_PRIVATE (buffer));
/* set to NULL so the data is not freed */
GST_BUFFER_DATA (buffer) = NULL;
gst_buffer_default_free (buffer);
}
#endif
/*
Set the caps that the application desires.
Go through the plugin list, finding the plugin that first fits the given parameters
*/
static gboolean
gst_glsink_set_caps (GstGLSink * sink, GstCaps * caps)
{
g_warning ("in glsink set caps!\n");
printf ("Getting GLstring, context is %p\n", glXGetCurrentContext ());
GList *list = ((GstGLSinkClass *) G_OBJECT_GET_CLASS (sink))->plugins;
GstImageConnection *conn = NULL;
while (list) {
printf ("AGetting GLstring, context is %p\n", glXGetCurrentContext ());
GstImagePlugin *plugin = (GstImagePlugin *) list->data;
if ((conn = plugin->set_caps (sink->hook, caps)) != NULL) {
//gst_glsink_release_conn (sink);
printf ("BGetting GLstring, context is %p\n", glXGetCurrentContext ());
sink->conn = conn;
printf ("CGetting GLstring, context is %p\n", glXGetCurrentContext ());
sink->plugin = plugin;
sink->conn->open_conn (sink->conn, sink->hook);
return TRUE;
}
list = g_list_next (list);
}
return FALSE;
}
/**
Link the input video sink internally.
*/
static GstPadLinkReturn
gst_glsink_sinkconnect (GstPad * pad, GstCaps * caps)
{
g_warning ("in glsink sinkconnect!\n");
GstGLSink *sink;
guint32 fourcc, print_format, result;
sink = GST_GLSINK (gst_pad_get_parent (pad));
/* we are not going to act on variable caps */
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED;
gst_glxwindow_hook_context (sink->hook);
/* try to set the caps on the output */
result = gst_glsink_set_caps (sink, caps);
gst_glxwindow_unhook_context (sink->hook);
if (result == FALSE) {
return GST_PAD_LINK_REFUSED;
}
/* remember width & height */
gst_caps_get_int (caps, "width", &sink->width);
gst_caps_get_int (caps, "height", &sink->height);
gst_caps_get_fourcc_int (caps, "format", &fourcc);
print_format = GULONG_FROM_LE (fourcc);
GST_DEBUG ("glsink: setting %08x (%4.4s) %dx%d\n",
fourcc, (gchar *) & print_format, sink->width, sink->height);
/* emit signal */
g_object_freeze_notify (G_OBJECT (sink));
g_object_notify (G_OBJECT (sink), "width");
g_object_notify (G_OBJECT (sink), "height");
g_object_thaw_notify (G_OBJECT (sink));
return GST_PAD_LINK_OK;
}
static GstCaps *
gst_glsink_getcaps (GstPad * pad, GstCaps * caps)
{
g_warning ("in glsink get caps!\n");
/* what is the "caps" parameter good for? */
GstGLSink *sink = GST_GLSINK (gst_pad_get_parent (pad));
GstCaps *ret = NULL;
GList *list = ((GstGLSinkClass *) G_OBJECT_GET_CLASS (sink))->plugins;
gst_glxwindow_hook_context (sink->hook);
while (list) {
ret =
gst_caps_append (ret,
((GstImagePlugin *) list->data)->get_caps (sink->hook));
list = g_list_next (list);
}
gst_glxwindow_unhook_context (sink->hook);
return ret;
}
static void
gst_glsink_set_clock (GstElement * element, GstClock * clock)
{
GstGLSink *sink = GST_GLSINK (element);
sink->clock = clock;
}
static void
gst_glsink_chain (GstPad * pad, GstData * _data)
{
//g_warning("in glsink_chain!\n");
GstBuffer *buf = GST_BUFFER (_data);
GstGLSink *sink;
GstBuffer *buffer;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
sink = GST_GLSINK (gst_pad_get_parent (pad));
if (GST_IS_EVENT (buf)) {
GstEvent *event = GST_EVENT (buf);
switch (GST_EVENT_TYPE (event)) {
default:
gst_pad_event_default (pad, event);
}
return;
}
GST_DEBUG ("glsink: clock wait: %llu %u",
GST_BUFFER_TIMESTAMP (buf), GST_BUFFER_SIZE (buf));
#if 0
GstClockTime time = GST_BUFFER_TIMESTAMP (buf);
static int frame_drops = 0;
if (sink->clock && time != -1) {
if (time < gst_clock_get_time (sink->clock)) {
g_warning ("Frame drop (%d consecutive) !!", frame_drops);
/* we are going to drop late buffers */
gst_buffer_unref (buf);
frame_drops++;
return;
}
frame_drops = 0; // we made it - reset time
GstClockReturn ret;
GstClockID id =
gst_clock_new_single_shot_id (sink->clock, GST_BUFFER_TIMESTAMP (buf));
ret = gst_element_clock_wait (GST_ELEMENT (sink), id, NULL);
gst_clock_id_free (id);
/* we are going to drop early buffers */
if (ret == GST_CLOCK_EARLY) {
gst_buffer_unref (buf);
return;
}
}
#endif
/* call the notify _before_ displaying so the handlers can react */
sink->frames_displayed++;
g_object_notify (G_OBJECT (sink), "frames_displayed");
if (!sink->muted) {
if (glXGetCurrentContext () == NULL) {
printf ("Rehooking window !\n");
gst_glxwindow_hook_context (sink->hook);
#if 1
GST_DEBUG ("Initializing OpenGL parameters\n");
/* initialize OpenGL drawing */
glEnable (GL_DEPTH_TEST);
glEnable (GL_TEXTURE_2D);
glClearDepth (1.0f);
glClearColor (0, 0, 0, 0);
glEnable (GL_AUTO_NORMAL); // let OpenGL generate the Normals
glDisable (GL_BLEND);
glDisable (GL_CULL_FACE);
glPolygonMode (GL_FRONT, GL_FILL);
glPolygonMode (GL_BACK, GL_FILL);
glShadeModel (GL_SMOOTH);
glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
GstGLImageInfo *window = (GstGLImageInfo *) sink->hook;
int w = window->width, h = window->height;
glViewport (0, 0, (GLint) w, (GLint) h);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
GLfloat aspect = (GLfloat) w / (GLfloat) h;
glFrustum (-aspect, aspect, -1.0, 1.0, 5.0, 500.0);
#endif
gst_glxwindow_unhook_context (sink->hook);
gst_glxwindow_hook_context (sink->hook);
glMatrixMode (GL_MODELVIEW);
#if 0
sink->hook->free_info (sink->hook);
printf ("Reallocating window brutally !\n");
gst_glxwindow_new (sink);
#endif
}
/* free last_image, if any */
if (sink->last_image != NULL)
gst_buffer_unref (sink->last_image);
if (sink->bufferpool && GST_BUFFER_BUFFERPOOL (buf) == sink->bufferpool) {
// awful hack ! But I currently have no other solution without changing the API
sink->hook->demo = sink->demo;
sink->hook->dumpvideo = sink->dumpvideo;
sink->plugin->put_image (sink->hook,
(GstImageData *) GST_BUFFER_POOL_PRIVATE (buf));
sink->last_image = buf;
} else {
buffer =
gst_buffer_new_from_pool (gst_glsink_get_bufferpool (sink->sinkpad),
0, GST_BUFFER_SIZE (buf));
memcpy (GST_BUFFER_DATA (buffer), GST_BUFFER_DATA (buf),
GST_BUFFER_SIZE (buf) >
GST_BUFFER_SIZE (buffer) ? GST_BUFFER_SIZE (buffer) :
GST_BUFFER_SIZE (buf));
sink->plugin->put_image (sink->hook,
(GstImageData *) GST_BUFFER_POOL_PRIVATE (buffer));
sink->last_image = buffer;
gst_buffer_unref (buf);
}
//gst_glxwindow_unhook_context(sink->hook);
}
}
static void
gst_glsink_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
//g_warning("in set_property!\n");
GstGLSink *sink;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_GLSINK (object));
sink = GST_GLSINK (object);
switch (prop_id) {
case ARG_FRAMES_DISPLAYED:
sink->frames_displayed = g_value_get_int (value);
g_object_notify (object, "frames_displayed");
break;
case ARG_FRAME_TIME:
sink->frame_time = g_value_get_int (value);
break;
case ARG_HOOK:
if (sink->hook) {
sink->hook->free_info (sink->hook);
}
sink->hook = g_value_get_pointer (value);
break;
case ARG_MUTE:
sink->muted = g_value_get_boolean (value);
g_object_notify (object, "mute");
break;
case ARG_DEMO:
sink->demo = g_value_get_int (value);
g_object_notify (object, "demo");
break;
case ARG_DUMP:
sink->dumpvideo = g_value_get_boolean (value);
g_object_notify (object, "dump");
break;
case ARG_REPAINT:
if (sink->last_image != NULL) {
sink->plugin->put_image (sink->hook,
(GstImageData *) GST_BUFFER_POOL_PRIVATE (sink->last_image));
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_glsink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
//g_warning("in get_property!\n");
GstGLSink *sink;
/* it's not null if we got it, but it might not be ours */
sink = GST_GLSINK (object);
switch (prop_id) {
case ARG_WIDTH:
g_value_set_int (value, sink->width);
break;
case ARG_HEIGHT:
g_value_set_int (value, sink->height);
break;
case ARG_FRAMES_DISPLAYED:
g_value_set_int (value, sink->frames_displayed);
break;
case ARG_FRAME_TIME:
g_value_set_int (value, sink->frame_time / 1000000);
break;
case ARG_MUTE:
g_value_set_boolean (value, sink->muted);
break;
case ARG_DEMO:
g_value_set_int (value, sink->demo);
break;
case ARG_DUMP:
g_value_set_boolean (value, sink->dumpvideo);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_glsink_change_state (GstElement * element)
{
//g_warning("in change_state!\n");
GstGLSink *sink;
sink = GST_GLSINK (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
{
//g_warning("Going GST_STATE_READY_TO_PAUSED: %p", sink->conn);
}
break;
case GST_STATE_PAUSED_TO_PLAYING:
{
//g_warning("Going GST_STATE_PAUSED_TO_PLAYING: %p", sink->conn);
}
break;
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
if (sink->conn)
sink->conn->close_conn (sink->conn, sink->hook);
if (sink->last_image) {
gst_buffer_unref (sink->last_image);
sink->last_image = NULL;
}
break;
case GST_STATE_READY_TO_NULL:
gst_glsink_release_conn (sink);
break;
}
parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
/* Loading the library containing GstVideoSink, our parent object */
if (!gst_library_load ("gstvideo"))
return FALSE;
/* this is needed later on in the _real_ init (during a gst-launch) */
sink_template = gst_pad_template_new ("sink",
GST_PAD_SINK, GST_PAD_ALWAYS, NULL);
if (!gst_element_register (plugin, "glsink", GST_RANK_NONE, GST_TYPE_GLSINK))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"glsink",
"An OpenGL based video sink - uses OpenGL and GLX to draw video, utilizing different acceleration options",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN);