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gstreamer/sys/dshowvideosink/dshowvideosink.cpp
Michael Smith d1d7fb884d Add a new win32 videosink. Uses the DirectShow renderers for high-performance video rendering on win32. 
Original commit message from CVS:
* configure.ac:
* sys/Makefile.am:
* sys/dshowvideosink/Makefile.am:
* sys/dshowvideosink/README:
* sys/dshowvideosink/dshowvideofakesrc.cpp:
* sys/dshowvideosink/dshowvideofakesrc.h:
* sys/dshowvideosink/dshowvideosink.cpp:
* sys/dshowvideosink/dshowvideosink.h:
Add a new win32 videosink. Uses the DirectShow renderers for
high-performance video rendering on win32.
Currently only supports some YUV formats.
Rank PRIMARY, since it's much more useful for the common cases that the
directdraw sink (which only does RGB).
2008-06-02 18:23:54 +00:00

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/* GStreamer
* Copyright (C) 2008 Michael Smith <msmith@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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "dshowvideosink.h"
#include "dshowvideofakesrc.h"
#include <gst/interfaces/xoverlay.h>
#include "windows.h"
static const GstElementDetails gst_dshowvideosink_details =
GST_ELEMENT_DETAILS ("DirectShow video sink",
"Sink/Video",
"Display data using a DirectShow video renderer",
"Michael Smith <msmith@songbirdnest.com>");
GST_DEBUG_CATEGORY_STATIC (dshowvideosink_debug);
#define GST_CAT_DEFAULT dshowvideosink_debug
static GstCaps * gst_directshow_media_type_to_caps (AM_MEDIA_TYPE *mediatype);
static gboolean gst_caps_to_directshow_media_type (GstCaps *caps, AM_MEDIA_TYPE *mediatype);
/* TODO: Support RGB! */
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
"video/x-raw-yuv,"
"width = (int) [ 1, MAX ],"
"height = (int) [ 1, MAX ],"
"framerate = (fraction) [ 0, MAX ],"
"format = {(fourcc)YUY2, (fourcc)UYVY, (fourcc) YUVY, (fourcc)YV12 }")
);
static void gst_dshowvideosink_init_interfaces (GType type);
GST_BOILERPLATE_FULL (GstDshowVideoSink, gst_dshowvideosink, GstBaseSink,
GST_TYPE_BASE_SINK, gst_dshowvideosink_init_interfaces);
enum
{
PROP_0,
PROP_KEEP_ASPECT_RATIO,
PROP_FULL_SCREEN,
PROP_RENDERER
};
/* GObject methods */
static void gst_dshowvideosink_finalize (GObject * gobject);
static void gst_dshowvideosink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_dshowvideosink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
/* GstElement methods */
static GstStateChangeReturn gst_dshowvideosink_change_state (GstElement * element, GstStateChange transition);
/* GstBaseSink methods */
static gboolean gst_dshowvideosink_start (GstBaseSink * bsink);
static gboolean gst_dshowvideosink_stop (GstBaseSink * bsink);
static gboolean gst_dshowvideosink_unlock (GstBaseSink * bsink);
static gboolean gst_dshowvideosink_unlock_stop (GstBaseSink * bsink);
static gboolean gst_dshowvideosink_set_caps (GstBaseSink * bsink, GstCaps * caps);
static GstCaps *gst_dshowvideosink_get_caps (GstBaseSink * bsink);
static GstFlowReturn gst_dshowvideosink_render (GstBaseSink *sink, GstBuffer *buffer);
/* GstXOverlay methods */
static void gst_dshowvideosink_set_window_id (GstXOverlay * overlay, ULONG window_id);
/* TODO: event, preroll, buffer_alloc?
* buffer_alloc won't generally be all that useful because the renderers require a
* different stride to GStreamer's implicit values.
*/
static gboolean
gst_dshowvideosink_interface_supported (GstImplementsInterface * iface,
GType type)
{
g_assert (type == GST_TYPE_X_OVERLAY);
return TRUE;
}
static void
gst_dshowvideosink_interface_init (GstImplementsInterfaceClass * klass)
{
klass->supported = gst_dshowvideosink_interface_supported;
}
static void
gst_dshowvideosink_xoverlay_interface_init (GstXOverlayClass * iface)
{
iface->set_xwindow_id = gst_dshowvideosink_set_window_id;
}
static void
gst_dshowvideosink_init_interfaces (GType type)
{
static const GInterfaceInfo iface_info = {
(GInterfaceInitFunc) gst_dshowvideosink_interface_init,
NULL,
NULL,
};
static const GInterfaceInfo xoverlay_info = {
(GInterfaceInitFunc) gst_dshowvideosink_xoverlay_interface_init,
NULL,
NULL,
};
g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE,
&iface_info);
g_type_add_interface_static (type, GST_TYPE_X_OVERLAY, &xoverlay_info);
GST_DEBUG_CATEGORY_INIT (dshowvideosink_debug, "dshowvideosink", 0, \
"DirectShow video sink");
}
static void
gst_dshowvideosink_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (element_class, &gst_dshowvideosink_details);
}
static void
gst_dshowvideosink_class_init (GstDshowVideoSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_dshowvideosink_finalize);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_dshowvideosink_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_dshowvideosink_get_property);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dshowvideosink_change_state);
gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_dshowvideosink_get_caps);
gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_dshowvideosink_set_caps);
gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_dshowvideosink_start);
gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_dshowvideosink_stop);
gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_dshowvideosink_unlock);
gstbasesink_class->unlock_stop =
GST_DEBUG_FUNCPTR (gst_dshowvideosink_unlock_stop);
gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_dshowvideosink_render);
/* Add properties */
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_KEEP_ASPECT_RATIO, g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio", FALSE,
(GParamFlags)G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_FULL_SCREEN, g_param_spec_boolean ("fullscreen",
"Full screen mode",
"Use full-screen mode (not available when using XOverlay)", FALSE,
(GParamFlags)G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_RENDERER, g_param_spec_string ("renderer", "Renderer",
"Force usage of specific DirectShow renderer (VMR9 or VMR)",
NULL, (GParamFlags)G_PARAM_READWRITE));
}
static void
gst_dshowvideosink_clear (GstDshowVideoSink *sink)
{
sink->renderersupport = NULL;
sink->fakesrc = NULL;
sink->filter_graph = NULL;
sink->keep_aspect_ratio = FALSE;
sink->full_screen = FALSE;
sink->window_closed = FALSE;
sink->window_id = NULL;
sink->connected = FALSE;
}
static void
gst_dshowvideosink_init (GstDshowVideoSink * sink, GstDshowVideoSinkClass * klass)
{
gst_dshowvideosink_clear (sink);
CoInitializeEx (NULL, COINIT_MULTITHREADED);
/* TODO: Copied from GstVideoSink; should we use that as base class? */
/* 20ms is more than enough, 80-130ms is noticable */
gst_base_sink_set_max_lateness (GST_BASE_SINK (sink), 20 * GST_MSECOND);
gst_base_sink_set_qos_enabled (GST_BASE_SINK (sink), TRUE);
}
static void
gst_dshowvideosink_finalize (GObject * gobject)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (gobject);
if (sink->preferredrenderer)
g_free (sink->preferredrenderer);
CoUninitialize ();
G_OBJECT_CLASS (parent_class)->finalize (gobject);
}
static void
gst_dshowvideosink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (object);
switch (prop_id) {
case PROP_RENDERER:
if (sink->preferredrenderer)
g_free (sink->preferredrenderer);
sink->preferredrenderer = g_value_dup_string (value);
break;
case PROP_KEEP_ASPECT_RATIO:
sink->keep_aspect_ratio = g_value_get_boolean (value);
break;
case PROP_FULL_SCREEN:
sink->full_screen = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dshowvideosink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (object);
switch (prop_id) {
case PROP_RENDERER:
g_value_take_string (value, sink->preferredrenderer);
break;
case PROP_KEEP_ASPECT_RATIO:
g_value_set_boolean (value, sink->keep_aspect_ratio);
break;
case PROP_FULL_SCREEN:
g_value_set_boolean (value, sink->full_screen);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstCaps *
gst_dshowvideosink_get_caps (GstBaseSink * basesink)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (basesink);
return NULL;
}
static void dump_available_media_types (IPin *pin)
{
/* Enumerate all media types on this pin, output info about them */
IEnumMediaTypes *enumerator = NULL;
AM_MEDIA_TYPE *type;
GstCaps *caps;
int i = 0;
GST_INFO ("Enumerating media types on pin %p", pin);
pin->EnumMediaTypes (&enumerator);
while (enumerator->Next (1, &type, NULL) == S_OK) {
i++;
caps = gst_directshow_media_type_to_caps (type);
if (caps) {
gchar *str = gst_caps_to_string (caps);
GST_INFO ("Type %d: converted to caps \"%s\"", i, str);
g_free (str);
gst_caps_unref (caps);
}
else
GST_INFO ("Failed to convert type to GstCaps");
DeleteMediaType (type);
}
GST_INFO ("Enumeration complete");
enumerator->Release();
}
static void
dump_all_pin_media_types (IBaseFilter *filter)
{
IEnumPins *enumpins = NULL;
IPin *pin = NULL;
HRESULT hres;
hres = filter->EnumPins (&enumpins);
if (FAILED(hres)) {
GST_WARNING ("Cannot enumerate pins on filter");
return;
}
GST_INFO ("Enumerating pins on filter %p", filter);
while (enumpins->Next (1, &pin, NULL) == S_OK)
{
IMemInputPin *meminputpin;
PIN_DIRECTION pindir;
hres = pin->QueryDirection (&pindir);
GST_INFO ("Found a pin with direction: %s", (pindir == PINDIR_INPUT)? "input": "output");
dump_available_media_types (pin);
hres = pin->QueryInterface (
IID_IMemInputPin, (void **) &meminputpin);
if (hres == S_OK) {
GST_INFO ("Pin is a MemInputPin (push mode): %p", meminputpin);
meminputpin->Release();
}
else
GST_INFO ("Pin is not a MemInputPin (pull mode?): %p", pin);
pin->Release();
}
enumpins->Release();
}
gboolean
gst_dshow_get_pin_from_filter (IBaseFilter *filter, PIN_DIRECTION pindir, IPin **pin)
{
gboolean ret = FALSE;
IEnumPins *enumpins = NULL;
IPin *pintmp = NULL;
HRESULT hres;
*pin = NULL;
hres = filter->EnumPins (&enumpins);
if (FAILED(hres)) {
return ret;
}
while (enumpins->Next (1, &pintmp, NULL) == S_OK)
{
PIN_DIRECTION pindirtmp;
hres = pintmp->QueryDirection (&pindirtmp);
if (hres == S_OK && pindir == pindirtmp) {
*pin = pintmp;
ret = TRUE;
break;
}
pintmp->Release ();
}
enumpins->Release ();
return ret;
}
/* WNDPROC for application-supplied windows */
LRESULT APIENTRY WndProcHook (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
/* Handle certain actions specially on the window passed to us.
* Then forward back to the original window.
*/
GstDshowVideoSink *sink = (GstDshowVideoSink *)GetProp (hWnd, L"GstDShowVideoSink");
switch (message) {
case WM_PAINT:
sink->renderersupport->PaintWindow ();
break;
case WM_MOVE:
case WM_SIZE:
sink->renderersupport->MoveWindow ();
break;
case WM_DISPLAYCHANGE:
sink->renderersupport->DisplayModeChanged();
break;
case WM_ERASEBKGND:
/* DirectShow docs recommend ignoring this message to avoid flicker */
return TRUE;
case WM_CLOSE:
sink->window_closed = TRUE;
}
return CallWindowProc (sink->prevWndProc, hWnd, message, wParam, lParam);
}
/* WndProc for our default window, if the application didn't supply one */
LRESULT APIENTRY
WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
GstDshowVideoSink *sink = (GstDshowVideoSink *)GetWindowLongPtr (hWnd, GWLP_USERDATA);
if (!sink) {
/* I think these happen before we have a chance to set our userdata pointer */
GST_DEBUG ("No sink!");
return DefWindowProc (hWnd, message, wParam, lParam);
}
GST_DEBUG_OBJECT (sink, "Got a window message for %x, %x", hWnd, message);
switch (message) {
case WM_PAINT:
sink->renderersupport->PaintWindow ();
break;
case WM_MOVE:
case WM_SIZE:
sink->renderersupport->MoveWindow ();
break;
case WM_DISPLAYCHANGE:
sink->renderersupport->DisplayModeChanged();
break;
case WM_ERASEBKGND:
/* DirectShow docs recommend ignoring this message */
return TRUE;
case WM_CLOSE:
sink->renderersupport->DestroyWindow ();
sink->window_closed = TRUE;
return 0;
}
return DefWindowProc (hWnd, message, wParam, lParam);
}
static gpointer
gst_dshowvideosink_window_thread (GstDshowVideoSink * sink)
{
WNDCLASS WndClass;
int width, height;
int offx, offy;
DWORD exstyle, style;
memset (&WndClass, 0, sizeof (WNDCLASS));
WndClass.style = CS_HREDRAW | CS_VREDRAW;
WndClass.hInstance = GetModuleHandle (NULL);
WndClass.lpszClassName = L"GST-DShowSink";
WndClass.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);
WndClass.cbClsExtra = 0;
WndClass.cbWndExtra = 0;
WndClass.lpfnWndProc = WndProc;
WndClass.hCursor = LoadCursor (NULL, IDC_ARROW);
RegisterClass (&WndClass);
if (sink->full_screen) {
/* This doesn't seem to work, it returns the wrong values! But when we
* later use ShowWindow to show it maximized, it goes to full-screen
* anyway. TODO: Figure out why. */
width = GetSystemMetrics (SM_CXFULLSCREEN);
height = GetSystemMetrics (SM_CYFULLSCREEN);
offx = 0;
offy = 0;
style = WS_POPUP; /* No window decorations */
exstyle = 0;
}
else {
/* By default, create a normal top-level window, the size
* of the video.
*/
RECT rect;
VIDEOINFOHEADER *vi = (VIDEOINFOHEADER *)sink->mediatype.pbFormat;
/* rcTarget is the aspect-ratio-corrected size of the video. */
width = vi->rcTarget.right + GetSystemMetrics (SM_CXSIZEFRAME) * 2;
height = vi->rcTarget.bottom + GetSystemMetrics (SM_CYCAPTION) +
(GetSystemMetrics (SM_CYSIZEFRAME) * 2);
SystemParametersInfo (SPI_GETWORKAREA, NULL, &rect, 0);
int screenwidth = rect.right - rect.left;
int screenheight = rect.bottom - rect.top;
offx = rect.left;
offy = rect.top;
/* Make it fit into the screen without changing the
* aspect ratio. */
if (width > screenwidth) {
double ratio = (double)screenwidth/(double)width;
width = screenwidth;
height = (int)(height * ratio);
}
if (height > screenheight) {
double ratio = (double)screenheight/(double)height;
height = screenheight;
width = (int)(width * ratio);
}
style = WS_OVERLAPPEDWINDOW; /* Normal top-level window */
exstyle = 0;
}
HWND video_window = CreateWindowEx (exstyle, L"GST-DShowSink",
L"GStreamer DirectShow sink default window",
style, offx, offy, width, height, NULL, NULL,
WndClass.hInstance, NULL);
if (video_window == NULL) {
GST_ERROR_OBJECT (sink, "Failed to create window!");
return NULL;
}
SetWindowLongPtr (video_window, GWLP_USERDATA, (LONG)sink);
/* signal application we created a window */
gst_x_overlay_got_xwindow_id (GST_X_OVERLAY (sink),
(gulong)video_window);
/* Set the renderer's clipping window */
if (!sink->renderersupport->SetRendererWindow (video_window)) {
GST_WARNING_OBJECT (sink, "Failed to set video clipping window on filter %p", sink->renderersupport);
}
/* Now show the window, as appropriate */
if (sink->full_screen) {
ShowWindow (video_window, SW_SHOWMAXIMIZED);
ShowCursor (FALSE);
}
else
ShowWindow (video_window, SW_SHOWNORMAL);
/* Trigger the initial paint of the window */
UpdateWindow (video_window);
ReleaseSemaphore (sink->window_created_signal, 1, NULL);
/* start message loop processing our default window messages */
while (1) {
MSG msg;
if (GetMessage (&msg, video_window, 0, 0) <= 0) {
GST_LOG_OBJECT (sink, "our window received WM_QUIT or error.");
break;
}
DispatchMessage (&msg);
}
return NULL;
}
static gboolean
gst_dshowvideosink_create_default_window (GstDshowVideoSink * sink)
{
sink->window_created_signal = CreateSemaphore (NULL, 0, 1, NULL);
if (sink->window_created_signal == NULL)
goto failed;
sink->window_thread = g_thread_create (
(GThreadFunc) gst_dshowvideosink_window_thread, sink, TRUE, NULL);
/* wait maximum 10 seconds for window to be created */
if (WaitForSingleObject (sink->window_created_signal,
10000) != WAIT_OBJECT_0)
goto failed;
CloseHandle (sink->window_created_signal);
return TRUE;
failed:
CloseHandle (sink->window_created_signal);
GST_ELEMENT_ERROR (sink, RESOURCE, WRITE,
("Error creating our default window"), (NULL));
return FALSE;
}
static void gst_dshowvideosink_set_window_id (GstXOverlay * overlay, ULONG window_id)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (overlay);
HWND videowindow = (HWND)window_id;
if (videowindow == sink->window_id) {
GST_DEBUG_OBJECT (sink, "Window already set");
return;
}
/* TODO: What if we already have a window? What if we're already playing? */
sink->window_id = videowindow;
}
static void gst_dshowvideosink_set_window_for_renderer (GstDshowVideoSink *sink)
{
/* Application has requested a specific window ID */
sink->prevWndProc = (WNDPROC) SetWindowLong (sink->window_id, GWL_WNDPROC, (LONG)WndProcHook);
GST_DEBUG_OBJECT (sink, "Set wndproc to %p from %p", WndProcHook, sink->prevWndProc);
SetProp (sink->window_id, L"GstDShowVideoSink", sink);
/* This causes the new WNDPROC to become active */
SetWindowPos (sink->window_id, 0, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
if (!sink->renderersupport->SetRendererWindow (sink->window_id)) {
GST_WARNING_OBJECT (sink, "Failed to set HWND %x on renderer", sink->window_id);
return;
}
/* This tells the renderer where the window is located, needed to
* start drawing in the right place. */
sink->renderersupport->MoveWindow();
GST_INFO_OBJECT (sink, "Set renderer window to %x", sink->window_id);
}
static void
gst_dshowvideosink_prepare_window (GstDshowVideoSink *sink)
{
/* Give the app a last chance to supply a window id */
if (!sink->window_id) {
gst_x_overlay_prepare_xwindow_id (GST_X_OVERLAY (sink));
}
/* If the app supplied one, use it. Otherwise, go ahead
* and create (and use) our own window */
if (sink->window_id) {
gst_dshowvideosink_set_window_for_renderer (sink);
}
else {
gst_dshowvideosink_create_default_window (sink);
}
}
static gboolean
gst_dshowvideosink_connect_graph (GstDshowVideoSink *sink)
{
HRESULT hres;
IPin *srcpin;
IPin *sinkpin;
GST_INFO_OBJECT (sink, "Connecting DirectShow pins");
srcpin = sink->fakesrc->GetOutputPin();
gst_dshow_get_pin_from_filter (sink->renderersupport->GetFilter(), PINDIR_INPUT,
&sinkpin);
if (!sinkpin) {
GST_WARNING_OBJECT (sink, "Cannot get input pin from Renderer");
return FALSE;
}
/* Be warned that this call WILL deadlock unless you call it from
* the main thread. Thus, we call this from the state change, not from
* setcaps (which happens in a streaming thread).
*/
hres = sink->filter_graph->ConnectDirect (
srcpin, sinkpin, NULL);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "Could not connect pins: %x", hres);
sinkpin->Release();
return FALSE;
}
sinkpin->Release();
return TRUE;
}
static GstStateChangeReturn
gst_dshowvideosink_start_graph (GstDshowVideoSink *sink)
{
IMediaControl *control = NULL;
HRESULT hres;
GstStateChangeReturn ret;
GST_DEBUG_OBJECT (sink, "Connecting and starting DirectShow graph");
if (!sink->connected) {
/* This is fine; this just means we haven't connected yet.
* That's normal for the first time this is called.
* So, create a window (or start using an application-supplied
* one, then connect the graph */
gst_dshowvideosink_prepare_window (sink);
if (!gst_dshowvideosink_connect_graph (sink)) {
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
sink->connected = TRUE;
}
hres = sink->filter_graph->QueryInterface(
IID_IMediaControl, (void **) &control);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "Failed to get IMediaControl interface");
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
GST_INFO_OBJECT (sink, "Running DirectShow graph");
hres = control->Run();
if (FAILED (hres)) {
GST_ERROR_OBJECT (sink,
"Failed to run the directshow graph (error=%x)", hres);
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
GST_DEBUG_OBJECT (sink, "DirectShow graph is now running");
ret = GST_STATE_CHANGE_SUCCESS;
done:
if (control)
control->Release();
return ret;
}
static GstStateChangeReturn
gst_dshowvideosink_pause_graph (GstDshowVideoSink *sink)
{
IMediaControl *control = NULL;
GstStateChangeReturn ret;
HRESULT hres;
hres = sink->filter_graph->QueryInterface(
IID_IMediaControl, (void **) &control);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "Failed to get IMediaControl interface");
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
GST_INFO_OBJECT (sink, "Pausing DirectShow graph");
hres = control->Pause();
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink,
"Can't pause the directshow graph (error=%x)", hres);
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
ret = GST_STATE_CHANGE_SUCCESS;
done:
if (control)
control->Release();
return ret;
}
static GstStateChangeReturn
gst_dshowvideosink_stop_graph (GstDshowVideoSink *sink)
{
IMediaControl *control = NULL;
GstStateChangeReturn ret;
HRESULT hres;
IPin *sinkpin;
hres = sink->filter_graph->QueryInterface(
IID_IMediaControl, (void **) &control);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "Failed to get IMediaControl interface");
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
GST_INFO_OBJECT (sink, "Stopping DirectShow graph");
hres = control->Stop();
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink,
"Can't stop the directshow graph (error=%x)", hres);
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
sink->filter_graph->Disconnect(sink->fakesrc->GetOutputPin());
gst_dshow_get_pin_from_filter (sink->renderersupport->GetFilter(), PINDIR_INPUT,
&sinkpin);
sink->filter_graph->Disconnect(sinkpin);
sinkpin->Release();
GST_DEBUG_OBJECT (sink, "DirectShow graph has stopped");
if (sink->window_id) {
/* Return control of application window */
SetWindowLong (sink->window_id, GWL_WNDPROC, (LONG)sink->prevWndProc);
RemoveProp (sink->window_id, L"GstDShowVideoSink");
SetWindowPos (sink->window_id, 0, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
sink->prevWndProc = NULL;
}
sink->connected = FALSE;
ret = GST_STATE_CHANGE_SUCCESS;
done:
if (control)
control->Release();
return ret;
}
static GstStateChangeReturn
gst_dshowvideosink_change_state (GstElement * element, GstStateChange transition)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
ret = gst_dshowvideosink_start_graph (sink);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
ret = gst_dshowvideosink_pause_graph (sink);
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
ret = gst_dshowvideosink_stop_graph (sink);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_dshowvideosink_clear (sink);
break;
}
return ret;
}
class VMR9Support : public RendererSupport
{
private:
GstDshowVideoSink *sink;
IBaseFilter *filter;
IVMRWindowlessControl9 *control;
IVMRFilterConfig9 *config;
HWND video_window;
public:
VMR9Support (GstDshowVideoSink *sink) :
sink(sink),
filter(NULL),
control(NULL),
config(NULL)
{
}
~VMR9Support() {
if (control)
control->Release();
if (config)
config->Release();
if (filter)
filter->Release();
}
const char *GetName() {
return "VideoMixingRenderer9";
}
IBaseFilter *GetFilter() {
return filter;
}
gboolean Configure() {
HRESULT hres;
hres = CoCreateInstance (CLSID_VideoMixingRenderer9, NULL, CLSCTX_INPROC,
IID_IBaseFilter, (LPVOID *) &filter);
if (FAILED (hres)) {
GST_ERROR_OBJECT (sink,
"Can't create an instance of renderer (error=%x)",
hres);
return FALSE;
}
hres = filter->QueryInterface (
IID_IVMRFilterConfig9, (void **) &config);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "VMR9 filter config interface missing: %x", hres);
return FALSE;
}
hres = config->SetRenderingMode (VMR9Mode_Windowless);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "VMR9 couldn't be set to windowless mode: %x", hres);
return FALSE;
}
else {
GST_DEBUG_OBJECT (sink, "Set VMR9 (%p) to windowless mode!", filter);
}
/* We can't QI to this until _after_ we've been set to windowless mode.
* Apparently this is against the rules in COM, but that's how it is... */
hres = filter->QueryInterface (
IID_IVMRWindowlessControl9, (void **) &control);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "VMR9 windowless control interface missing: %x", hres);
return FALSE;
}
if (sink->keep_aspect_ratio) {
control->SetAspectRatioMode(VMR9ARMode_LetterBox);
}
else {
control->SetAspectRatioMode(VMR9ARMode_None);
}
return TRUE;
}
gboolean SetRendererWindow(HWND window) {
video_window = window;
HRESULT hres = control->SetVideoClippingWindow (video_window);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "Failed to set video clipping window on filter %p: %x", filter, hres);
return FALSE;
}
return TRUE;
}
void PaintWindow()
{
HRESULT hr;
PAINTSTRUCT ps;
HDC hdc;
RECT rcClient;
GetClientRect(video_window, &rcClient);
hdc = BeginPaint(video_window, &ps);
hr = control->RepaintVideo(video_window, hdc);
EndPaint(video_window, &ps);
}
void MoveWindow()
{
HRESULT hr;
RECT rect;
// Track the movement of the container window and resize as needed
GetClientRect(video_window, &rect);
hr = control->SetVideoPosition(NULL, &rect);
}
void DisplayModeChanged() {
control->DisplayModeChanged();
}
void DestroyWindow() {
::DestroyWindow (video_window);
}
};
class VMR7Support : public RendererSupport
{
private:
GstDshowVideoSink *sink;
IBaseFilter *filter;
IVMRWindowlessControl *control;
IVMRFilterConfig *config;
HWND video_window;
public:
VMR7Support (GstDshowVideoSink *sink) :
sink(sink),
filter(NULL),
control(NULL),
config(NULL)
{
}
~VMR7Support() {
if (control)
control->Release();
if (config)
config->Release();
if (filter)
filter->Release();
}
const char *GetName() {
return "VideoMixingRenderer";
}
IBaseFilter *GetFilter() {
return filter;
}
gboolean Configure() {
HRESULT hres;
hres = CoCreateInstance (CLSID_VideoMixingRenderer, NULL, CLSCTX_INPROC,
IID_IBaseFilter, (LPVOID *) &filter);
if (FAILED (hres)) {
GST_ERROR_OBJECT (sink,
"Can't create an instance of renderer (error=%x)",
hres);
return FALSE;
}
hres = filter->QueryInterface (
IID_IVMRFilterConfig, (void **) &config);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "VMR filter config interface missing: %x", hres);
return FALSE;
}
hres = config->SetRenderingMode (VMRMode_Windowless);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "VMR couldn't be set to windowless mode: %x", hres);
return FALSE;
}
else {
GST_DEBUG_OBJECT (sink, "Set VMR (%p) to windowless mode!", filter);
}
hres = filter->QueryInterface (
IID_IVMRWindowlessControl, (void **) &control);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "VMR windowless control interface missing: %x", hres);
return FALSE;
}
if (sink->keep_aspect_ratio) {
control->SetAspectRatioMode(VMR_ARMODE_LETTER_BOX);
}
else {
control->SetAspectRatioMode(VMR_ARMODE_NONE);
}
return TRUE;
}
gboolean SetRendererWindow(HWND window) {
video_window = window;
HRESULT hres = control->SetVideoClippingWindow (video_window);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "Failed to set video clipping window on filter %p: %x", filter, hres);
return FALSE;
}
return TRUE;
}
void PaintWindow()
{
HRESULT hr;
PAINTSTRUCT ps;
HDC hdc;
RECT rcClient;
GetClientRect(video_window, &rcClient);
hdc = BeginPaint(video_window, &ps);
hr = control->RepaintVideo(video_window, hdc);
EndPaint(video_window, &ps);
}
void MoveWindow()
{
HRESULT hr;
RECT rect;
// Track the movement of the container window and resize as needed
GetClientRect(video_window, &rect);
hr = control->SetVideoPosition(NULL, &rect);
}
void DisplayModeChanged() {
control->DisplayModeChanged();
}
void DestroyWindow() {
::DestroyWindow (video_window);
}
};
static gboolean
gst_dshowvideosink_create_renderer (GstDshowVideoSink *sink)
{
GST_DEBUG_OBJECT (sink, "Trying to create renderer '%s'", "VMR9");
RendererSupport *support = NULL;
if (sink->preferredrenderer) {
if (!strcmp (sink->preferredrenderer, "VMR9")) {
GST_INFO_OBJECT (sink, "Forcing use of VMR9");
support = new VMR9Support (sink);
}
else if (!strcmp (sink->preferredrenderer, "VMR")) {
GST_INFO_OBJECT (sink, "Forcing use of VMR");
support = new VMR7Support (sink);
}
else {
GST_ERROR_OBJECT (sink, "Unknown sink type '%s'", sink->preferredrenderer);
return FALSE;
}
if (!support->Configure()) {
GST_ERROR_OBJECT (sink, "Couldn't configure selected renderer");
delete support;
return FALSE;
}
goto done;
}
support = new VMR9Support (sink);
if (!support->Configure()) {
GST_INFO_OBJECT (sink, "Failed to configure VMR9, trying VMR7");
delete support;
support = new VMR7Support (sink);
if (!support->Configure()) {
GST_ERROR_OBJECT (sink, "Failed to configure VMR9 or VMR7");
delete support;
return FALSE;
}
}
done:
sink->renderersupport = support;
return TRUE;
}
static gboolean
gst_dshowvideosink_build_filtergraph (GstDshowVideoSink *sink)
{
HRESULT hres;
/* Build our DirectShow FilterGraph, looking like:
*
* [ fakesrc ] -> [ sink filter ]
*
* so we can feed data in through the fakesrc.
*
* The sink filter can be one of our supported filters: VMR9 (VMR7?, EMR?)
*/
hres = CoCreateInstance (CLSID_FilterGraph, NULL, CLSCTX_INPROC,
IID_IFilterGraph, (LPVOID *) & sink->filter_graph);
if (FAILED (hres)) {
GST_ERROR_OBJECT (sink,
"Can't create an instance of the dshow graph manager (error=%x)", hres);
goto error;
}
sink->fakesrc = new VideoFakeSrc();
IBaseFilter *filter;
hres = sink->fakesrc->QueryInterface (
IID_IBaseFilter, (void **) &filter);
if (FAILED (hres)) {
GST_ERROR_OBJECT (sink, "Could not QI fakesrc to IBaseFilter");
goto error;
}
hres = sink->filter_graph->AddFilter (filter, L"fakesrc");
if (FAILED (hres)) {
GST_ERROR_OBJECT (sink,
"Can't add our fakesrc filter to the graph (error=%x)", hres);
goto error;
}
if (!gst_dshowvideosink_create_renderer (sink)) {
GST_ERROR_OBJECT (sink, "Could not create a video renderer");
goto error;
}
/* dump_all_pin_media_types (sink->renderer); */
hres =
sink->filter_graph->AddFilter (sink->renderersupport->GetFilter(),
L"renderer");
if (FAILED (hres)) {
GST_ERROR_OBJECT (sink,
"Can't add renderer to the graph (error=%x)", hres);
goto error;
}
return TRUE;
error:
if (sink->fakesrc) {
sink->fakesrc->Release();
sink->fakesrc = NULL;
}
if (sink->filter_graph) {
sink->filter_graph->Release();
sink->filter_graph = NULL;
}
return FALSE;
}
static gboolean
gst_dshowvideosink_start (GstBaseSink * bsink)
{
HRESULT hres = S_FALSE;
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (bsink);
/* Just build the filtergraph; we don't link or otherwise configure it yet */
return gst_dshowvideosink_build_filtergraph (sink);
}
static gboolean
gst_dshowvideosink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (bsink);
/* TODO: What do we want to do if the caps change while we're running?
* Find out if we can handle this or not... */
if (!gst_caps_to_directshow_media_type (caps, &sink->mediatype)) {
GST_WARNING_OBJECT (sink, "Cannot convert caps to AM_MEDIA_TYPE, rejecting");
return FALSE;
}
/* Now we have an AM_MEDIA_TYPE describing what we're going to send.
* We set this on our DirectShow fakesrc's output pin.
*/
sink->fakesrc->GetOutputPin()->SetMediaType (&sink->mediatype);
return TRUE;
}
static gboolean
gst_dshowvideosink_stop (GstBaseSink * bsink)
{
IPin *input_pin = NULL, *output_pin = NULL;
HRESULT hres = S_FALSE;
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (bsink);
if (!sink->filter_graph) {
GST_WARNING_OBJECT (sink, "Cannot destroy filter graph; it doesn't exist");
return TRUE;
}
/* Release the renderer */
if (sink->renderersupport) {
delete sink->renderersupport;
sink->renderersupport = NULL;
}
/* Release our dshow fakesrc */
if (sink->fakesrc) {
sink->fakesrc->Release();
sink->fakesrc = NULL;
}
/* Release the filter graph manager */
if (sink->filter_graph) {
sink->filter_graph->Release();
sink->filter_graph = NULL;
}
return TRUE;
}
static GstFlowReturn
gst_dshowvideosink_render (GstBaseSink *bsink, GstBuffer *buffer)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (bsink);
GstFlowReturn ret;
if (sink->window_closed) {
GST_WARNING_OBJECT (sink, "Window has been closed, stopping");
return GST_FLOW_ERROR;
}
GST_DEBUG_OBJECT (sink, "Pushing buffer through fakesrc->renderer");
ret = sink->fakesrc->GetOutputPin()->PushBuffer (buffer);
GST_DEBUG_OBJECT (sink, "Done pushing buffer through fakesrc->renderer");
return ret;
}
/* TODO: How can we implement these? Figure that out... */
static gboolean
gst_dshowvideosink_unlock (GstBaseSink * bsink)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (bsink);
return TRUE;
}
static gboolean
gst_dshowvideosink_unlock_stop (GstBaseSink * bsink)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (bsink);
return TRUE;
}
/* TODO: Move all of this into generic code? */
/* Helpers to format GUIDs the same way we find them in the source */
#define GUID_FORMAT "{%.8x, %.4x, %.4x, { %.2x, %.2x, %.2x, %.2x, %.2x, %.2x, %.2x, %.2x }}"
#define GUID_ARGS(guid) \
guid.Data1, guid.Data2, guid.Data3, \
guid.Data4[0], guid.Data4[1], guid.Data4[3], guid.Data4[4], \
guid.Data4[5], guid.Data4[6], guid.Data4[7], guid.Data4[8]
static GstCaps *
audio_media_type_to_caps (AM_MEDIA_TYPE *mediatype)
{
return NULL;
}
static GstCaps *
video_media_type_to_caps (AM_MEDIA_TYPE *mediatype)
{
GstCaps *caps = NULL;
/* TODO: Add RGB types. */
if (IsEqualGUID (mediatype->subtype, MEDIASUBTYPE_YUY2))
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'), NULL);
else if (IsEqualGUID (mediatype->subtype, MEDIASUBTYPE_UYVY))
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'), NULL);
else if (IsEqualGUID (mediatype->subtype, MEDIASUBTYPE_YUYV))
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('Y', 'U', 'Y', 'V'), NULL);
else if (IsEqualGUID (mediatype->subtype, MEDIASUBTYPE_YV12))
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('Y', 'V', '1', '2'), NULL);
if (!caps) {
GST_DEBUG ("No subtype known; cannot continue");
return NULL;
}
if (IsEqualGUID (mediatype->formattype, FORMAT_VideoInfo) &&
mediatype->cbFormat >= sizeof(VIDEOINFOHEADER))
{
VIDEOINFOHEADER *vh = (VIDEOINFOHEADER *)mediatype->pbFormat;
/* TODO: Set PAR here. Based on difference between source and target RECTs?
* Do we want framerate? Based on AvgTimePerFrame? */
gst_caps_set_simple (caps,
"width", G_TYPE_INT, vh->bmiHeader.biWidth,
"height", G_TYPE_INT, vh->bmiHeader.biHeight,
NULL);
}
return caps;
}
/* Create a GstCaps object representing the same media type as
* this AM_MEDIA_TYPE.
*
* Returns NULL if no corresponding GStreamer type is known.
*
* May modify mediatype.
*/
static GstCaps *
gst_directshow_media_type_to_caps (AM_MEDIA_TYPE *mediatype)
{
GstCaps *caps = NULL;
if (IsEqualGUID (mediatype->majortype, MEDIATYPE_Video))
caps = video_media_type_to_caps (mediatype);
else if (IsEqualGUID (mediatype->majortype, MEDIATYPE_Audio))
caps = audio_media_type_to_caps (mediatype);
else {
GST_DEBUG ("Non audio/video media types not yet recognised, please add me: "
GUID_FORMAT, GUID_ARGS(mediatype->majortype));
}
if (caps) {
gchar *capsstring = gst_caps_to_string (caps);
GST_DEBUG ("Converted AM_MEDIA_TYPE to \"%s\"", capsstring);
g_free (capsstring);
}
else {
GST_WARNING ("Failed to convert AM_MEDIA_TYPE to caps");
}
return caps;
}
/* Fill in a DirectShow AM_MEDIA_TYPE structure representing the same media
* type as this GstCaps object.
*
* Returns FALSE if no corresponding type is known.
*
* Only operates on simple (single structure) caps.
*/
static gboolean
gst_caps_to_directshow_media_type (GstCaps *caps, AM_MEDIA_TYPE *mediatype)
{
GstStructure *s = gst_caps_get_structure (caps, 0);
const gchar *name = gst_structure_get_name (s);
gchar *capsstring = gst_caps_to_string (caps);
GST_DEBUG ("Converting caps \"%s\" to AM_MEDIA_TYPE", capsstring);
g_free (capsstring);
memset (mediatype, 0, sizeof (AM_MEDIA_TYPE));
if (!strcmp (name, "video/x-raw-yuv")) {
guint32 fourcc;
int width, height;
int bpp;
if (!gst_structure_get_fourcc (s, "format", &fourcc)) {
GST_WARNING ("Failed to convert caps, no fourcc");
return FALSE;
}
if (!gst_structure_get_int (s, "width", &width)) {
GST_WARNING ("Failed to convert caps, no width");
return FALSE;
}
if (!gst_structure_get_int (s, "height", &height)) {
GST_WARNING ("Failed to convert caps, no height");
return FALSE;
}
mediatype->majortype = MEDIATYPE_Video;
switch (fourcc) {
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
mediatype->subtype = MEDIASUBTYPE_YUY2;
bpp = 16;
break;
case GST_MAKE_FOURCC ('Y', 'U', 'Y', 'V'):
mediatype->subtype = MEDIASUBTYPE_YUYV;
bpp = 16;
break;
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
mediatype->subtype = MEDIASUBTYPE_UYVY;
bpp = 16;
break;
case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
mediatype->subtype = MEDIASUBTYPE_YV12;
bpp = 12;
break;
default:
GST_WARNING ("Failed to convert caps, not a known fourcc");
return FALSE;
}
mediatype->bFixedSizeSamples = TRUE; /* Always true for raw video */
mediatype->bTemporalCompression = FALSE; /* Likewise, always false */
{
int par_n, par_d;
VIDEOINFOHEADER *vi = (VIDEOINFOHEADER *)CoTaskMemAlloc (sizeof (VIDEOINFOHEADER));
memset (vi, 0, sizeof (VIDEOINFOHEADER));
mediatype->formattype = FORMAT_VideoInfo;
mediatype->cbFormat = sizeof (VIDEOINFOHEADER);
mediatype->pbFormat = (BYTE *)vi;
mediatype->lSampleSize = width * height * bpp / 8;
GST_INFO ("Set mediatype format: size %d, sample size %d", mediatype->cbFormat, mediatype->lSampleSize);
vi->rcSource.top = 0;
vi->rcSource.left = 0;
vi->rcSource.bottom = height;
vi->rcSource.right = width;
vi->rcTarget.top = 0;
vi->rcTarget.left = 0;
if (gst_structure_get_fraction (s, "pixel-aspect-ratio", &par_n, &par_d)) {
/* To handle non-square pixels, we set the target rectangle to a
* different size than the source rectangle.
* There might be a better way, but this seems to work. */
vi->rcTarget.bottom = height;
vi->rcTarget.right = width * par_n / par_d;
GST_DEBUG ("Got PAR: set target right to %d from width %d", vi->rcTarget.right, width);
}
else {
GST_DEBUG ("No PAR found");
vi->rcTarget.bottom = height;
vi->rcTarget.right = width;
}
vi->bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
vi->bmiHeader.biWidth = width;
vi->bmiHeader.biHeight = -height; /* Required to be negative. */
vi->bmiHeader.biPlanes = 1; /* Required to be 1 */
vi->bmiHeader.biBitCount = bpp;
vi->bmiHeader.biCompression = fourcc;
vi->bmiHeader.biSizeImage = width * height * bpp / 8;
/* We can safely zero these; they don't matter for our uses */
vi->bmiHeader.biXPelsPerMeter = 0;
vi->bmiHeader.biYPelsPerMeter = 0;
vi->bmiHeader.biClrUsed = 0;
vi->bmiHeader.biClrImportant = 0;
}
GST_DEBUG ("Successfully built AM_MEDIA_TYPE from caps");
return TRUE;
}
GST_WARNING ("Failed to convert caps, not a known caps type");
/* Only YUV supported so far */
return FALSE;
}
/* Plugin entry point */
extern "C" static gboolean
plugin_init (GstPlugin * plugin)
{
/* PRIMARY: this is the best videosink to use on windows */
if (!gst_element_register (plugin, "dshowvideosink",
GST_RANK_PRIMARY, GST_TYPE_DSHOWVIDEOSINK))
return FALSE;
return TRUE;
}
extern "C" GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"dshowsinkwrapper",
"DirectShow sink wrapper plugin",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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