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gstreamer/sys/dshowvideosink/dshowvideosink.cpp
Michael Smith 9eaccf6550 dshowvideosink: Return ASYNC appropriately from change_state. 
Make sure we don't do the wrong thing when our base class is returning
ASYNC in state changes.
2009-02-12 17:31:50 -08:00

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/* GStreamer
* Copyright (C) 2008 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "dshowvideosink.h"
#include "dshowvideofakesrc.h"
#include <gst/interfaces/xoverlay.h>
#include "windows.h"
#define WM_GRAPH_NOTIFY WM_APP + 1 /* Private message */
static const GstElementDetails gst_dshowvideosink_details =
GST_ELEMENT_DETAILS ("DirectShow video sink",
"Sink/Video",
"Display data using a DirectShow video renderer",
"Pioneers of the Inevitable <songbird@songbirdnest.com>");
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 (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->filter_media_event = 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)
{
HRESULT hr;
gst_dshowvideosink_clear (sink);
hr = CoInitialize (0);
if (SUCCEEDED(hr))
sink->comInitialized = TRUE;
/* 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);
if (sink->comInitialized) {
CoUninitialize ();
sink->comInitialized = FALSE;
}
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;
}
static void
gst_dshowvideosink_handle_event (GstDshowVideoSink *sink)
{
if (sink->filter_media_event) {
long evCode;
LONG_PTR param1, param2;
HRESULT hr;
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, L"GstDShowVideoSink");
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;
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);
sink->window_id = video_window;
/* 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)
{
HRESULT hres;
/* 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);
}
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();
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, 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;
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
rettmp = gst_dshowvideosink_pause_graph (sink);
if (rettmp == GST_STATE_CHANGE_FAILURE)
ret = rettmp;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
rettmp = gst_dshowvideosink_stop_graph (sink);
if (rettmp == GST_STATE_CHANGE_FAILURE)
ret = rettmp;
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;
gboolean comInit = FALSE;
hres = CoInitialize(0);
if (SUCCEEDED (hres))
comInit = TRUE;
/* 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;
}
if (comInit)
CoUninitialize();
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;
}
if (comInit)
CoUninitialize();
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) {
/* Look at the DShow APIs for dynamically modifying the pipeline and see
* if we can make this work later... */
GST_WARNING_OBJECT (sink, "Changing caps at runtime is not yet supported");
return FALSE;
}
if (!gst_caps_to_directshow_media_type (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");
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: %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-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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