gstreamer/sys/osxvideo/osxvideosink.m
2010-05-11 22:30:03 +02:00

523 lines
15 KiB
Objective-C

/* GStreamer
* OSX video sink
* Copyright (C) 2004-6 Zaheer Abbas Merali <zaheerabbas at merali dot org>
* Copyright (C) 2007,2008,2009 Pioneers of the Inevitable <songbird@songbirdnest.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* The development of this code was made possible due to the involvement of
* Pioneers of the Inevitable, the creators of the Songbird Music player.
*
*/
/**
* SECTION:element-osxvideosink
*
* The OSXVideoSink renders video frames to a MacOSX window. The video output
* must be directed to a window embedded in an existing NSApp.
*
* When the NSView to be embedded is created an element #GstMessage with a
* name of 'have-ns-view' will be created and posted on the bus.
* The pointer to the NSView to embed will be in the 'nsview' field of that
* message. The application MUST handle this message and embed the view
* appropriately.
*/
#include "config.h"
#include <gst/interfaces/xoverlay.h>
#include "osxvideosink.h"
#include <unistd.h>
#import "cocoawindow.h"
GST_DEBUG_CATEGORY (gst_debug_osx_video_sink);
#define GST_CAT_DEFAULT gst_debug_osx_video_sink
static GstStaticPadTemplate gst_osx_video_sink_sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-yuv, "
"framerate = (fraction) [ 0, MAX ], "
"width = (int) [ 1, MAX ], "
"height = (int) [ 1, MAX ], "
#if G_BYTE_ORDER == G_BIG_ENDIAN
"format = (fourcc) YUY2")
#else
"format = (fourcc) UYVY")
#endif
);
enum
{
ARG_0,
ARG_EMBED,
};
static void gst_osx_video_sink_osxwindow_destroy (GstOSXVideoSink * osxvideosink);
static GstVideoSinkClass *parent_class = NULL;
/* This function handles osx window creation */
static gboolean
gst_osx_video_sink_osxwindow_create (GstOSXVideoSink * osxvideosink, gint width,
gint height)
{
NSRect rect;
GstOSXWindow *osxwindow = NULL;
GstStructure *s;
GstMessage *msg;
gboolean res = TRUE;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
g_return_val_if_fail (GST_IS_OSX_VIDEO_SINK (osxvideosink), FALSE);
GST_DEBUG_OBJECT (osxvideosink, "Creating new OSX window");
osxvideosink->osxwindow = osxwindow = g_new0 (GstOSXWindow, 1);
osxwindow->width = width;
osxwindow->height = height;
/* Allocate our GstGLView for the window, and then tell the application
* about it (hopefully it's listening...) */
rect.origin.x = 0.0;
rect.origin.y = 0.0;
rect.size.width = (float) osxwindow->width;
rect.size.height = (float) osxwindow->height;
osxwindow->gstview =[[GstGLView alloc] initWithFrame:rect];
s = gst_structure_new ("have-ns-view",
"nsview", G_TYPE_POINTER, osxwindow->gstview,
nil);
msg = gst_message_new_element (GST_OBJECT (osxvideosink), s);
gst_element_post_message (GST_ELEMENT (osxvideosink), msg);
GST_INFO_OBJECT (osxvideosink, "'have-ns-view' message sent");
/* check if have-ns-view was handled and osxwindow->gstview was added to a
* superview
*/
if ([osxwindow->gstview haveSuperview] == NO) {
/* have-ns-view wasn't handled, post prepare-xwindow-id */
if (osxvideosink->superview == NULL) {
GST_INFO_OBJECT (osxvideosink, "emitting prepare-xwindow-id");
gst_x_overlay_prepare_xwindow_id (GST_X_OVERLAY (osxvideosink));
}
if (osxvideosink->superview != NULL) {
/* prepare-xwindow-id was handled, we have the superview in
* osxvideosink->superview. We now add osxwindow->gstview to the superview
* from the main thread
*/
GST_INFO_OBJECT (osxvideosink, "we have a superview, adding our view to it");
[osxwindow->gstview performSelectorOnMainThread:@selector(addToSuperview:)
withObject:osxvideosink->superview waitUntilDone:YES];
} else {
/* the view wasn't added to a superview. It's possible that the
* application handled have-ns-view, stored our view internally and is
* going to add it to a superview later (webkit does that now).
*/
GST_INFO_OBJECT (osxvideosink, "no superview");
}
}
[pool release];
return res;
}
static void
gst_osx_video_sink_osxwindow_destroy (GstOSXVideoSink * osxvideosink)
{
NSAutoreleasePool *pool;
g_return_if_fail (GST_IS_OSX_VIDEO_SINK (osxvideosink));
pool = [[NSAutoreleasePool alloc] init];
if (osxvideosink->osxwindow) {
if (osxvideosink->superview) {
[osxvideosink->osxwindow->gstview
performSelectorOnMainThread:@selector(removeFromSuperview:)
withObject:(id)nil waitUntilDone:YES];
}
[osxvideosink->osxwindow->gstview release];
g_free (osxvideosink->osxwindow);
osxvideosink->osxwindow = NULL;
}
[pool release];
}
/* This function resizes a GstXWindow */
static void
gst_osx_video_sink_osxwindow_resize (GstOSXVideoSink * osxvideosink,
GstOSXWindow * osxwindow, guint width, guint height)
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
g_return_if_fail (osxwindow != NULL);
g_return_if_fail (GST_IS_OSX_VIDEO_SINK (osxvideosink));
osxwindow->width = width;
osxwindow->height = height;
GST_DEBUG_OBJECT (osxvideosink, "Resizing window to (%d,%d)", width, height);
/* Directly resize the underlying view */
GST_DEBUG_OBJECT (osxvideosink, "Calling setVideoSize on %p", osxwindow->gstview);
[osxwindow->gstview setVideoSize:width :height];
[pool release];
}
static gboolean
gst_osx_video_sink_setcaps (GstBaseSink * bsink, GstCaps * caps)
{
GstOSXVideoSink *osxvideosink;
GstStructure *structure;
gboolean res, result = FALSE;
gint video_width, video_height;
osxvideosink = GST_OSX_VIDEO_SINK (bsink);
GST_DEBUG_OBJECT (osxvideosink, "caps: %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
res = gst_structure_get_int (structure, "width", &video_width);
res &= gst_structure_get_int (structure, "height", &video_height);
if (!res) {
goto beach;
}
GST_DEBUG_OBJECT (osxvideosink, "our format is: %dx%d video",
video_width, video_height);
GST_VIDEO_SINK_WIDTH (osxvideosink) = video_width;
GST_VIDEO_SINK_HEIGHT (osxvideosink) = video_height;
gst_osx_video_sink_osxwindow_resize (osxvideosink, osxvideosink->osxwindow,
video_width, video_height);
result = TRUE;
beach:
return result;
}
static GstStateChangeReturn
gst_osx_video_sink_change_state (GstElement * element,
GstStateChange transition)
{
GstOSXVideoSink *osxvideosink;
GstStateChangeReturn ret;
osxvideosink = GST_OSX_VIDEO_SINK (element);
GST_DEBUG_OBJECT (osxvideosink, "%s => %s",
gst_element_state_get_name(GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name(GST_STATE_TRANSITION_NEXT (transition)));
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* Creating our window and our image */
GST_VIDEO_SINK_WIDTH (osxvideosink) = 320;
GST_VIDEO_SINK_HEIGHT (osxvideosink) = 240;
if (!gst_osx_video_sink_osxwindow_create (osxvideosink,
GST_VIDEO_SINK_WIDTH (osxvideosink),
GST_VIDEO_SINK_HEIGHT (osxvideosink))) {
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
break;
default:
break;
}
ret = (GST_ELEMENT_CLASS (parent_class))->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_VIDEO_SINK_WIDTH (osxvideosink) = 0;
GST_VIDEO_SINK_HEIGHT (osxvideosink) = 0;
gst_osx_video_sink_osxwindow_destroy (osxvideosink);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
done:
return ret;
}
static GstFlowReturn
gst_osx_video_sink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
{
GstOSXVideoSink *osxvideosink;
guint8 *viewdata;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
osxvideosink = GST_OSX_VIDEO_SINK (bsink);
viewdata = (guint8 *) [osxvideosink->osxwindow->gstview getTextureBuffer];
GST_DEBUG ("show_frame");
memcpy (viewdata, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
[osxvideosink->osxwindow->gstview displayTexture];
[pool release];
return GST_FLOW_OK;
}
/* Buffer management */
/* =========================================== */
/* */
/* Init & Class init */
/* */
/* =========================================== */
static void
gst_osx_video_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstOSXVideoSink *osxvideosink;
g_return_if_fail (GST_IS_OSX_VIDEO_SINK (object));
osxvideosink = GST_OSX_VIDEO_SINK (object);
switch (prop_id) {
case ARG_EMBED:
/* Ignore, just here for backwards compatibility */
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_osx_video_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstOSXVideoSink *osxvideosink;
g_return_if_fail (GST_IS_OSX_VIDEO_SINK (object));
osxvideosink = GST_OSX_VIDEO_SINK (object);
switch (prop_id) {
case ARG_EMBED:
g_value_set_boolean (value, TRUE);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_osx_video_sink_init (GstOSXVideoSink * osxvideosink)
{
osxvideosink->osxwindow = NULL;
osxvideosink->superview = NULL;
}
static void
gst_osx_video_sink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class, "OSX Video sink",
"Sink/Video", "OSX native videosink",
"Zaheer Abbas Merali <zaheerabbas at merali dot org>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_osx_video_sink_sink_template_factory));
}
static void
gst_osx_video_sink_finalize (GObject *object)
{
GstOSXVideoSink *osxvideosink = GST_OSX_VIDEO_SINK (object);
if (osxvideosink->superview)
[osxvideosink->superview release];
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_osx_video_sink_class_init (GstOSXVideoSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_VIDEO_SINK);
gobject_class->set_property = gst_osx_video_sink_set_property;
gobject_class->get_property = gst_osx_video_sink_get_property;
gobject_class->finalize = gst_osx_video_sink_finalize;
gstbasesink_class->set_caps = gst_osx_video_sink_setcaps;
gstbasesink_class->preroll = gst_osx_video_sink_show_frame;
gstbasesink_class->render = gst_osx_video_sink_show_frame;
gstelement_class->change_state = gst_osx_video_sink_change_state;
/**
* GstOSXVideoSink:embed
*
* Set to #TRUE if you are embedding the video window in an application.
*
**/
g_object_class_install_property (gobject_class, ARG_EMBED,
g_param_spec_boolean ("embed", "embed", "For ABI compatiblity only, do not use",
FALSE, G_PARAM_READWRITE));
}
static gboolean
gst_osx_video_sink_interface_supported (GstImplementsInterface * iface, GType type)
{
g_assert (type == GST_TYPE_X_OVERLAY);
return TRUE;
}
static void
gst_osx_video_sink_interface_init (GstImplementsInterfaceClass * klass)
{
klass->supported = gst_osx_video_sink_interface_supported;
}
static void
gst_osx_video_sink_set_xwindow_id (GstXOverlay * overlay, gulong window_id)
{
GstOSXVideoSink *osxvideosink = GST_OSX_VIDEO_SINK (overlay);
if (osxvideosink->superview) {
GST_INFO_OBJECT (osxvideosink, "old xwindow id %p", osxvideosink->superview);
if (osxvideosink->osxwindow) {
[osxvideosink->osxwindow->gstview
performSelectorOnMainThread:@selector(removeFromSuperview:)
withObject:(id)nil waitUntilDone:YES];
}
[osxvideosink->superview release];
}
GST_INFO_OBJECT (osxvideosink, "set xwindow id 0x%lx", window_id);
osxvideosink->superview = [((NSView *) window_id) retain];
if (osxvideosink->osxwindow) {
[osxvideosink->osxwindow->gstview performSelectorOnMainThread:@selector(addToSuperview:)
withObject:osxvideosink->superview waitUntilDone:YES];
}
}
static void
gst_osx_video_sink_xoverlay_init (GstXOverlayClass * iface)
{
iface->set_xwindow_id = gst_osx_video_sink_set_xwindow_id;
iface->expose = NULL;
iface->handle_events = NULL;
}
/* ============================================================= */
/* */
/* Public Methods */
/* */
/* ============================================================= */
/* =========================================== */
/* */
/* Object typing & Creation */
/* */
/* =========================================== */
GType
gst_osx_video_sink_get_type (void)
{
static GType osxvideosink_type = 0;
if (!osxvideosink_type) {
static const GTypeInfo osxvideosink_info = {
sizeof (GstOSXVideoSinkClass),
gst_osx_video_sink_base_init,
NULL,
(GClassInitFunc) gst_osx_video_sink_class_init,
NULL,
NULL,
sizeof (GstOSXVideoSink),
0,
(GInstanceInitFunc) gst_osx_video_sink_init,
};
static const GInterfaceInfo iface_info = {
(GInterfaceInitFunc) gst_osx_video_sink_interface_init,
NULL,
NULL,
};
static const GInterfaceInfo overlay_info = {
(GInterfaceInitFunc) gst_osx_video_sink_xoverlay_init,
NULL,
NULL,
};
osxvideosink_type = g_type_register_static (GST_TYPE_VIDEO_SINK,
"GstOSXVideoSink", &osxvideosink_info, 0);
g_type_add_interface_static (osxvideosink_type,
GST_TYPE_IMPLEMENTS_INTERFACE, &iface_info);
g_type_add_interface_static (osxvideosink_type, GST_TYPE_X_OVERLAY,
&overlay_info);
}
return osxvideosink_type;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "osxvideosink",
GST_RANK_PRIMARY, GST_TYPE_OSX_VIDEO_SINK))
return FALSE;
GST_DEBUG_CATEGORY_INIT (gst_debug_osx_video_sink, "osxvideosink", 0,
"osxvideosink element");
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"osxvideo",
"OSX native video output plugin",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)