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gstreamer/subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp
Vivienne Watermeier 6c2f6c3bd4 all: Use new navigation interface and API 
Use and implement the new navigation interface in all relevant sink elements,
and use API functions everywhere instead of directy accessing the event structure.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1633>
2022-03-23 13:14:52 +00:00

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/* GStreamer
* Copyright (C) 2008 Pioneers of the Inevitable <songbird@songbirdnest.com>
* 2010 FLUENDO S.A. <support@fluendo.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "dshowvideosink.h"
#include "dshowvideofakesrc.h"
#include <gst/video/video.h>
#include <gst/video/videooverlay.h>
#include <gst/video/navigation.h>
#include "windows.h"
#define WM_GRAPH_NOTIFY WM_APP + 1 /* Private message */
GST_DEBUG_CATEGORY (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 (GstDshowVideoSink * sink,
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,"
"width = (int) [ 1, MAX ],"
"height = (int) [ 1, MAX ],"
"framerate = (fraction) [ 0, MAX ],"
"format = {(string)YUY2, (string)UYVY, (string)YV12 }")
);
static void gst_dshowvideosink_init_interfaces (GType type);
static void gst_dshowvideosink_videooverlay_init (GstVideoOverlayInterface *iface);
static void
gst_dshowvideosink_navigation_interface_init (GstNavigationInterface * iface);
#define gst_dshowvideosink_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstDshowVideoSink, gst_dshowvideosink,
GST_TYPE_VIDEO_SINK,
G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY, gst_dshowvideosink_videooverlay_init);
G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION, gst_dshowvideosink_navigation_interface_init))
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, GstCaps * filter);
static GstFlowReturn gst_dshowvideosink_show_frame (GstVideoSink *sink, GstBuffer *buffer);
static void gst_dshowvideosink_set_window_for_renderer (GstDshowVideoSink *sink);
/* COM initialization/uninitialization thread */
static void gst_dshowvideosink_com_thread (GstDshowVideoSink * sink);
/* 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 void
gst_dshowvideosink_set_window_handle (GstVideoOverlay * overlay, guintptr window_id)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (overlay);
HWND previous_window = sink->window_id;
HWND videowindow = (HWND)window_id;
if (videowindow == sink->window_id) {
GST_DEBUG_OBJECT (sink, "Window already set");
return;
}
sink->window_id = videowindow;
/* Update window if we're already playing. */
if (sink->connected && sink->filter_media_event) {
HRESULT hres;
if (sink->is_new_window) {
/* If we created a new window */
SendMessage (previous_window, WM_CLOSE, NULL, NULL);
sink->is_new_window = FALSE;
sink->window_closed = FALSE;
} else {
/* Return control of application window */
SetWindowLongPtr (previous_window, GWLP_WNDPROC, (LONG_PTR)sink->prevWndProc);
SetWindowPos (previous_window, 0, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
}
gst_dshowvideosink_set_window_for_renderer (sink);
hres = sink->filter_media_event->SetNotifyWindow ((OAHWND)sink->window_id, WM_GRAPH_NOTIFY, 0);
GST_DEBUG_OBJECT (sink, "SetNotifyWindow(%p) returned %x", sink->window_id, hres);
}
}
static void
gst_dshowvideosink_expose (GstVideoOverlay * overlay)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (overlay);
if (sink->renderersupport) {
sink->renderersupport->PaintWindow ();
}
}
static void
gst_dshowvideosink_videooverlay_init (GstVideoOverlayInterface * iface)
{
iface->set_window_handle = gst_dshowvideosink_set_window_handle;
iface->expose = gst_dshowvideosink_expose;
}
static void
gst_dshowvideosink_navigation_send_event (GstNavigation * navigation,
GstEvent * event)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (navigation);
GstPad *pad = NULL;
/* FXIME: handle aspect ratio. */
pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (sink));
if (GST_IS_PAD (pad) && GST_IS_EVENT (event)) {
gst_pad_send_event (pad, event);
gst_object_unref (pad);
}
}
static void
gst_dshowvideosink_navigation_interface_init (GstNavigationInterface * iface)
{
/* FIXME: navigation interface partially implemented.
* Need to call gst_navigation_send_event_simple and like in directdrawsink.
*/
iface->send_event_simple = gst_dshowvideosink_navigation_send_event;
}
static void
gst_dshowvideosink_class_init (GstDshowVideoSinkClass * klass)
{
GObjectClass *o_class;
GstElementClass *e_class;
GstBaseSinkClass *bs_class;
GstVideoSinkClass *vs_class;
o_class = (GObjectClass *) klass;
e_class = (GstElementClass *) klass;
bs_class = (GstBaseSinkClass *) klass;
vs_class = (GstVideoSinkClass *) klass;
o_class->finalize = gst_dshowvideosink_finalize;
o_class->set_property = gst_dshowvideosink_set_property;
o_class->get_property = gst_dshowvideosink_get_property;
gst_element_class_set_static_metadata (e_class, "DirectShow video sink",
"Sink/Video", "Display data using a DirectShow video renderer",
"Pioneers of the Inevitable <songbird@songbirdnest.com>, " \
"FLUENDO S.A. <support@fluendo.com>");
gst_element_class_add_static_pad_template (e_class, &sink_template);
e_class->change_state = GST_DEBUG_FUNCPTR (gst_dshowvideosink_change_state);
bs_class->get_caps = GST_DEBUG_FUNCPTR (gst_dshowvideosink_get_caps);
bs_class->set_caps = GST_DEBUG_FUNCPTR (gst_dshowvideosink_set_caps);
bs_class->start = GST_DEBUG_FUNCPTR (gst_dshowvideosink_start);
bs_class->stop = GST_DEBUG_FUNCPTR (gst_dshowvideosink_stop);
bs_class->unlock = GST_DEBUG_FUNCPTR (gst_dshowvideosink_unlock);
bs_class->unlock_stop =
GST_DEBUG_FUNCPTR (gst_dshowvideosink_unlock_stop);
vs_class->show_frame = GST_DEBUG_FUNCPTR (gst_dshowvideosink_show_frame);
/* 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", TRUE,
(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 (EVR, VMR9 or VMR7)",
NULL, (GParamFlags)G_PARAM_READWRITE));
}
static void
gst_dshowvideosink_clear (GstDshowVideoSink *sink)
{
sink->renderersupport = NULL;
sink->fakesrc = NULL;
sink->filter_graph = NULL;
sink->filter_media_event = NULL;
sink->keep_aspect_ratio = FALSE;
sink->full_screen = FALSE;
sink->window_closed = FALSE;
sink->window_id = NULL;
sink->is_new_window = FALSE;
sink->connected = FALSE;
sink->graph_running = FALSE;
}
static void
gst_dshowvideosink_init (GstDshowVideoSink * sink)
{
gst_dshowvideosink_clear (sink);
g_mutex_init (&sink->graph_lock);
g_mutex_init (&sink->com_init_lock);
g_mutex_init (&sink->com_deinit_lock);
g_cond_init (&sink->com_initialized);
g_cond_init (&sink->com_uninitialize);
g_cond_init (&sink->com_uninitialized);
g_mutex_lock (&sink->com_init_lock);
/* create the COM initialization thread */
g_thread_new ("gstdshowvideosinkcomthread", (GThreadFunc)gst_dshowvideosink_com_thread, sink);
/* wait until the COM thread signals that COM has been initialized */
g_cond_wait (&sink->com_initialized, &sink->com_init_lock);
g_mutex_unlock (&sink->com_init_lock);
}
static void
gst_dshowvideosink_finalize (GObject * gobject)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (gobject);
g_free (sink->preferredrenderer);
/* signal the COM thread that it sould uninitialize COM */
if (sink->comInitialized) {
g_mutex_lock (&sink->com_deinit_lock);
g_cond_signal (&sink->com_uninitialize);
g_cond_wait (&sink->com_uninitialized, &sink->com_deinit_lock);
g_mutex_unlock (&sink->com_deinit_lock);
}
g_mutex_clear (&sink->com_init_lock);
g_mutex_clear (&sink->com_deinit_lock);
g_cond_clear (&sink->com_initialized);
g_cond_clear (&sink->com_uninitialize);
g_cond_clear (&sink->com_uninitialized);
g_mutex_clear (&sink->graph_lock);
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:
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);
if (sink->renderersupport)
sink->renderersupport->SetAspectRatioMode();
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 void
gst_dshowvideosink_com_thread (GstDshowVideoSink * sink)
{
HRESULT res;
g_mutex_lock (&sink->com_init_lock);
/* Initialize COM with a MTA for this process. This thread will
* be the first one to enter the apartement and the last one to leave
* it, unitializing COM properly */
res = CoInitializeEx (0, COINIT_MULTITHREADED);
if (res == S_FALSE)
GST_WARNING_OBJECT (sink, "COM has been already initialized in the same process");
else if (res == RPC_E_CHANGED_MODE)
GST_WARNING_OBJECT (sink, "The concurrency model of COM has changed.");
else
GST_INFO_OBJECT (sink, "COM initialized successfully");
sink->comInitialized = TRUE;
/* Signal other threads waiting on this condition that COM was initialized */
g_cond_signal (&sink->com_initialized);
g_mutex_unlock (&sink->com_init_lock);
/* Wait until the uninitialize condition is met to leave the COM apartement */
g_mutex_lock (&sink->com_deinit_lock);
g_cond_wait (&sink->com_uninitialize, &sink->com_deinit_lock);
CoUninitialize ();
GST_INFO_OBJECT (sink, "COM uninitialized successfully");
sink->comInitialized = FALSE;
g_cond_signal (&sink->com_uninitialized);
g_mutex_unlock (&sink->com_deinit_lock);
}
static GstCaps *
gst_dshowvideosink_get_caps (GstBaseSink * basesink, GstCaps * filter)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (basesink);
GstCaps *ret = NULL;
return ret;
}
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();
}
static gboolean
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;
}
static void
gst_dshowvideosink_handle_event (GstDshowVideoSink *sink)
{
if (sink->filter_media_event) {
long evCode;
LONG_PTR param1, param2;
while (SUCCEEDED (sink->filter_media_event->GetEvent(&evCode, &param1, &param2, 0)))
{
GST_INFO_OBJECT (sink, "Received DirectShow graph event code 0x%x", evCode);
sink->filter_media_event->FreeEventParams(evCode, param1, param2);
}
}
}
/* 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, (LPCSTR)"GstDShowVideoSink");
g_assert (sink != NULL);
switch (message) {
case WM_GRAPH_NOTIFY:
gst_dshowvideosink_handle_event (sink);
return 0;
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_GRAPH_NOTIFY:
GST_LOG_OBJECT (sink, "GRAPH_NOTIFY WINDOW MESSAGE");
gst_dshowvideosink_handle_event (sink);
return 0;
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;
PostQuitMessage (WM_QUIT);
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 = (LPCSTR)"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;
AM_MEDIA_TYPE pmt = (AM_MEDIA_TYPE)sink->mediatype;
VIDEOINFOHEADER *vi = (VIDEOINFOHEADER *)pmt.pbFormat;
if (vi == NULL)
{
GST_ELEMENT_ERROR (sink, RESOURCE, NOT_FOUND, ("Unknown media format"), (NULL));
return NULL;
}
/* 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, (LPCSTR)"GST-DShowSink",
(LPCSTR)"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;
}
sink->is_new_window = TRUE;
SetWindowLongPtr (video_window, GWLP_USERDATA, (LONG_PTR)sink);
sink->window_id = video_window;
/* signal application we created a window */
gst_video_overlay_got_window_handle (GST_VIDEO_OVERLAY (sink),
(guintptr)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_new ("windowthread",
(GThreadFunc) gst_dshowvideosink_window_thread,
sink);
/* 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_for_renderer (GstDshowVideoSink *sink)
{
WNDPROC prevWndProc = (WNDPROC)GetWindowLongPtr (sink->window_id, GWLP_WNDPROC);
if (prevWndProc == WndProcHook) {
/* The WndProc already points to our hook. Something has gone wrong
* somewhere else and this safety net prevents an infinite recursion */
return;
}
/* Application has requested a specific window ID */
sink->prevWndProc = (WNDPROC) SetWindowLongPtr (sink->window_id, GWLP_WNDPROC, (LONG_PTR)WndProcHook);
GST_DEBUG_OBJECT (sink, "Set wndproc to %p from %p", WndProcHook, sink->prevWndProc);
SetProp (sink->window_id, (LPCSTR)"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;
}
sink->is_new_window = FALSE;
/* 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)
{
HRESULT hres;
/* Give the app a last chance to supply a window id */
if (!sink->window_id) {
gst_video_overlay_prepare_window_handle (GST_VIDEO_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);
}
if (sink->filter_media_event) {
sink->filter_media_event->Release();
sink->filter_media_event = NULL;
}
hres = sink->filter_graph->QueryInterface(
IID_IMediaEventEx, (void **) &sink->filter_media_event);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "Failed to get IMediaEventEx");
}
else {
hres = sink->filter_media_event->SetNotifyWindow ((OAHWND)sink->window_id,
WM_GRAPH_NOTIFY, 0);
GST_DEBUG_OBJECT (sink, "SetNotifyWindow(%p) returned %x", sink->window_id, hres);
}
}
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();
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");
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());
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 */
SetWindowLongPtr (sink->window_id, GWLP_WNDPROC, (LONG_PTR)sink->prevWndProc);
RemoveProp (sink->window_id, (LPCSTR)"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, rettmp;
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_FAILURE)
return ret;
sink->graph_running = TRUE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
GST_DSHOWVIDEOSINK_GRAPH_LOCK(sink);
rettmp = gst_dshowvideosink_pause_graph (sink);
if (rettmp == GST_STATE_CHANGE_FAILURE)
ret = rettmp;
sink->graph_running = FALSE;
GST_DSHOWVIDEOSINK_GRAPH_UNLOCK(sink);
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DSHOWVIDEOSINK_GRAPH_LOCK(sink);
rettmp = gst_dshowvideosink_stop_graph (sink);
if (rettmp == GST_STATE_CHANGE_FAILURE)
ret = rettmp;
sink->graph_running = FALSE;
GST_DSHOWVIDEOSINK_GRAPH_UNLOCK(sink);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_dshowvideosink_clear (sink);
break;
default:
break;
}
return ret;
}
class EVRSupport : public RendererSupport
{
private:
GstDshowVideoSink *sink;
IBaseFilter *filter;
IMFGetService *service;
IMFVideoDisplayControl *control;
HWND video_window;
public:
EVRSupport (GstDshowVideoSink *sink) :
sink(sink),
filter(NULL),
service(NULL),
control(NULL)
{
}
~EVRSupport() {
if (control)
control->Release();
if (service)
service->Release();
if (filter)
filter->Release();
}
const char *GetName() {
return "EnhancedVideoRenderer";
}
IBaseFilter *GetFilter() {
return filter;
}
gboolean CheckOS () {
OSVERSIONINFO info;
info.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
GetVersionEx (&info);
if (info.dwMajorVersion < 6) {
return false;
}
else {
return true;
}
}
gboolean Configure() {
HRESULT hres;
if (!this->CheckOS ()) {
GST_DEBUG_OBJECT (sink, "Windows Vista is required at least for EVR to work");
return FALSE;
}
hres = CoCreateInstance (CLSID_EnhancedVideoRenderer, NULL, CLSCTX_INPROC,
IID_IBaseFilter, (LPVOID *) &filter);
GST_DEBUG_OBJECT (sink, "cocreateinstance returned %d", hres);
if (FAILED (hres)) {
GST_ERROR_OBJECT (sink,
"Can't create an instance of renderer (error=%x)",
hres);
return FALSE;
}
hres = filter->QueryInterface (IID_IMFGetService,
(void **) &service);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "EVR service interface missing: %x", hres);
return FALSE;
}
hres = service->GetService (MR_VIDEO_RENDER_SERVICE,
IID_IMFVideoDisplayControl, (void **) &control);
if (FAILED (hres)) {
GST_WARNING_OBJECT (sink, "EVR control service missing: %x", hres);
return FALSE;
}
SetAspectRatioMode();
return TRUE;
}
void SetAspectRatioMode() {
if (sink->keep_aspect_ratio) {
control->SetAspectRatioMode(MFVideoARMode_PreservePicture);
}
else {
control->SetAspectRatioMode(MFVideoARMode_None);
}
}
gboolean SetRendererWindow(HWND window) {
video_window = window;
HRESULT hres = control->SetVideoWindow (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();
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() {
}
void DestroyWindow() {
::DestroyWindow (video_window);
}
};
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;
}
SetAspectRatioMode();
return TRUE;
}
void SetAspectRatioMode() {
if (sink->keep_aspect_ratio) {
control->SetAspectRatioMode(VMR9ARMode_LetterBox);
}
else {
control->SetAspectRatioMode(VMR9ARMode_None);
}
}
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;
}
SetAspectRatioMode();
return TRUE;
}
void SetAspectRatioMode() {
if (sink->keep_aspect_ratio) {
control->SetAspectRatioMode(VMR_ARMODE_LETTER_BOX);
}
else {
control->SetAspectRatioMode(VMR_ARMODE_NONE);
}
}
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'", "EVR");
RendererSupport *support = NULL;
if (sink->preferredrenderer) {
if (!strcmp (sink->preferredrenderer, "EVR")) {
GST_INFO_OBJECT (sink, "Forcing use of EVR");
support = new EVRSupport (sink);
}
else 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 EVRSupport (sink);
if (!support->Configure ()) {
GST_INFO_OBJECT (sink, "Failed to configure EVR, trying VMR9");
delete support;
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;
}
if (sink->filter_media_event) {
sink->filter_media_event->Release();
sink->filter_media_event = 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);
if (sink->connected) {
IPin *sinkpin;
sink->filter_graph->Disconnect(sink->fakesrc->GetOutputPin());
get_pin_from_filter (sink->renderersupport->GetFilter(), PINDIR_INPUT,
&sinkpin);
sink->filter_graph->Disconnect(sinkpin);
sinkpin->Release();
}
if (!gst_caps_to_directshow_media_type (sink, caps, &sink->mediatype)) {
GST_WARNING_OBJECT (sink, "Cannot convert caps to AM_MEDIA_TYPE, rejecting");
return FALSE;
}
GST_DEBUG_OBJECT (sink, "Configuring output pin media type");
/* 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);
GST_DEBUG_OBJECT (sink, "Configured output pin media type");
/* We have configured the output pin media type.
* 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)) {
GST_ELEMENT_ERROR (sink, CORE, NEGOTIATION,
("Failed to initialize DirectShow graph with the input caps"), (NULL));
return FALSE;
}
sink->connected = TRUE;
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;
}
/* If we created a new window, send the close message and wait until
* it's closed in the window thread */
if (sink->is_new_window) {
SendMessage (sink->window_id, WM_CLOSE, NULL, NULL);
while (!sink->window_closed);
sink->is_new_window = FALSE;
}
/* 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;
}
if (sink->filter_media_event) {
sink->filter_media_event->Release();
sink->filter_media_event = NULL;
}
return TRUE;
}
static GstFlowReturn
gst_dshowvideosink_show_frame (GstVideoSink *vsink, GstBuffer *buffer)
{
GstDshowVideoSink *sink = GST_DSHOWVIDEOSINK (vsink);
GstFlowReturn ret;
GstStateChangeReturn retst;
if (sink->window_closed) {
GST_ELEMENT_ERROR (sink, RESOURCE, NOT_FOUND, ("Output window was closed"), (NULL));
return GST_FLOW_ERROR;
}
GST_DEBUG_OBJECT (sink, "Pushing buffer through fakesrc->renderer");
GST_DSHOWVIDEOSINK_GRAPH_LOCK(sink);
if (!sink->graph_running){
retst = gst_dshowvideosink_start_graph(sink);
if (retst == GST_STATE_CHANGE_FAILURE)
return GST_FLOW_FLUSHING;
}
ret = sink->fakesrc->GetOutputPin()->PushBuffer (buffer);
if (!sink->graph_running){
retst = gst_dshowvideosink_pause_graph(sink);
if (retst == GST_STATE_CHANGE_FAILURE)
return GST_FLOW_FLUSHING;
}
GST_DSHOWVIDEOSINK_GRAPH_UNLOCK(sink);
GST_DEBUG_OBJECT (sink, "Done pushing buffer through fakesrc->renderer: %s", gst_flow_get_name(ret));
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",
"format", GST_TYPE_VIDEO_FORMAT, GST_VIDEO_FORMAT_YUY2, NULL);
else if (IsEqualGUID (mediatype->subtype, MEDIASUBTYPE_UYVY))
caps = gst_caps_new_simple ("video/x-raw",
"format", GST_TYPE_VIDEO_FORMAT, GST_VIDEO_FORMAT_UYVY, NULL);
else if (IsEqualGUID (mediatype->subtype, MEDIASUBTYPE_YV12))
caps = gst_caps_new_simple ("video/x-raw",
"format", GST_TYPE_VIDEO_FORMAT, GST_VIDEO_FORMAT_YV12, 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 (GstDshowVideoSink * sink, GstCaps *caps,
AM_MEDIA_TYPE *mediatype)
{
GstVideoInfo info;
int width, height;
int bpp;
gst_video_info_init (&info);
if (!gst_video_info_from_caps (&info, caps))
{
GST_WARNING_OBJECT (sink, "Couldn't parse caps");
return FALSE;
}
memset (mediatype, 0, sizeof (AM_MEDIA_TYPE));
if (GST_VIDEO_FORMAT_INFO_IS_YUV (info.finfo))
{
guint32 fourcc;
GST_VIDEO_SINK_WIDTH (sink) = info.width;
GST_VIDEO_SINK_HEIGHT (sink) = info.height;
width = info.width;
height = info.height;
mediatype->majortype = MEDIATYPE_Video;
switch (GST_VIDEO_INFO_FORMAT (&info))
{
case GST_VIDEO_FORMAT_YUY2:
mediatype->subtype = MEDIASUBTYPE_YUY2;
fourcc = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
bpp = 16;
break;
case GST_VIDEO_FORMAT_UYVY:
mediatype->subtype = MEDIASUBTYPE_UYVY;
fourcc = GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
bpp = 16;
break;
case GST_VIDEO_FORMAT_YV12:
mediatype->subtype = MEDIASUBTYPE_YV12;
fourcc = GST_MAKE_FOURCC ('Y', 'V', '1', '2');
bpp = 12;
break;
default:
GST_WARNING_OBJECT (sink, "Couldn't parse caps");
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_OBJECT (sink, "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 (sink->keep_aspect_ratio) {
par_n = GST_VIDEO_INFO_PAR_N (&info);
par_d = GST_VIDEO_INFO_PAR_D (&info);
/* 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_OBJECT (sink, "Got PAR: set target right to %d from width %d",
vi->rcTarget.right, width);
}
else {
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_OBJECT (sink, "Successfully built AM_MEDIA_TYPE from caps");
return TRUE;
}
GST_WARNING_OBJECT (sink, "Failed to convert caps, not a known caps type");
/* Only YUV supported so far */
return FALSE;
}
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