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Check malloc return value when needed and don't print an error when such error happend.
[vlc] / modules / video_output / msw / glwin32.c
1 /*****************************************************************************
2  * glwin32.c: Windows OpenGL provider
3  *****************************************************************************
4  * Copyright (C) 2001-2004 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Gildas Bazin <gbazin@videolan.org>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23
24 #include <errno.h>                                                 /* ENOMEM */
25
26 #ifdef HAVE_CONFIG_H
27 # include "config.h"
28 #endif
29
30 #include <vlc/vlc.h>
31 #include <vlc_plugin.h>
32 #include <vlc_interface.h>
33 #include <vlc_vout.h>
34
35 #include <windows.h>
36 #include <ddraw.h>
37 #include <commctrl.h>
38
39 #include <multimon.h>
40 #undef GetSystemMetrics
41
42 #ifndef MONITOR_DEFAULTTONEAREST
43 #   define MONITOR_DEFAULTTONEAREST 2
44 #endif
45
46 #include <GL/gl.h>
47
48 #include "vout.h"
49
50 /*****************************************************************************
51  * Local prototypes.
52  *****************************************************************************/
53 static int  OpenVideo  ( vlc_object_t * );
54 static void CloseVideo ( vlc_object_t * );
55
56 static int  Init      ( vout_thread_t * );
57 static void End       ( vout_thread_t * );
58 static int  Manage    ( vout_thread_t * );
59 static void GLSwapBuffers( vout_thread_t * );
60 static void FirstSwap( vout_thread_t * );
61
62 /*****************************************************************************
63  * Module descriptor
64  *****************************************************************************/
65 vlc_module_begin();
66     set_category( CAT_VIDEO );
67     set_subcategory( SUBCAT_VIDEO_VOUT );
68     set_shortname( "OpenGL" );
69     set_description( N_("OpenGL video output") );
70     set_capability( "opengl provider", 100 );
71     add_shortcut( "glwin32" );
72     set_callbacks( OpenVideo, CloseVideo );
73
74     /* FIXME: Hack to avoid unregistering our window class */
75     linked_with_a_crap_library_which_uses_atexit( );
76 vlc_module_end();
77
78 #if 0 /* FIXME */
79     /* check if we registered a window class because we need to
80      * unregister it */
81     WNDCLASS wndclass;
82     if( GetClassInfo( GetModuleHandle(NULL), "VLC DirectX", &wndclass ) )
83         UnregisterClass( "VLC DirectX", GetModuleHandle(NULL) );
84 #endif
85
86 /*****************************************************************************
87  * OpenVideo: allocate OpenGL provider
88  *****************************************************************************
89  * This function creates and initializes a video window.
90  *****************************************************************************/
91 static int OpenVideo( vlc_object_t *p_this )
92 {
93     vout_thread_t * p_vout = (vout_thread_t *)p_this;
94     vlc_value_t val;
95
96     /* Allocate structure */
97     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
98     if( p_vout->p_sys == NULL )
99         return VLC_ENOMEM;
100     memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
101
102     /* Initialisations */
103     p_vout->pf_init = Init;
104     p_vout->pf_end = End;
105     p_vout->pf_manage = Manage;
106     p_vout->pf_swap = FirstSwap;
107
108     p_vout->p_sys->hwnd = p_vout->p_sys->hvideownd = NULL;
109     p_vout->p_sys->hparent = p_vout->p_sys->hfswnd = NULL;
110     p_vout->p_sys->i_changes = 0;
111     vlc_mutex_init( &p_vout->p_sys->lock );
112     SetRectEmpty( &p_vout->p_sys->rect_display );
113     SetRectEmpty( &p_vout->p_sys->rect_parent );
114
115     var_Create( p_vout, "video-title", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
116
117     p_vout->p_sys->b_cursor_hidden = 0;
118     p_vout->p_sys->i_lastmoved = mdate();
119     p_vout->p_sys->i_mouse_hide_timeout =
120         var_GetInteger(p_vout, "mouse-hide-timeout") * 1000;
121
122     /* Set main window's size */
123     p_vout->p_sys->i_window_width = p_vout->i_window_width;
124     p_vout->p_sys->i_window_height = p_vout->i_window_height;
125
126     /* Create the Vout EventThread, this thread is created by us to isolate
127      * the Win32 PeekMessage function calls. We want to do this because
128      * Windows can stay blocked inside this call for a long time, and when
129      * this happens it thus blocks vlc's video_output thread.
130      * Vout EventThread will take care of the creation of the video
131      * window (because PeekMessage has to be called from the same thread which
132      * created the window). */
133     msg_Dbg( p_vout, "creating Vout EventThread" );
134     p_vout->p_sys->p_event =
135         vlc_object_create( p_vout, sizeof(event_thread_t) );
136     p_vout->p_sys->p_event->p_vout = p_vout;
137     if( vlc_thread_create( p_vout->p_sys->p_event, "Vout Events Thread",
138                            EventThread, 0, 1 ) )
139     {
140         msg_Err( p_vout, "cannot create Vout EventThread" );
141         vlc_object_release( p_vout->p_sys->p_event );
142         p_vout->p_sys->p_event = NULL;
143         goto error;
144     }
145
146     if( p_vout->p_sys->p_event->b_error )
147     {
148         msg_Err( p_vout, "Vout EventThread failed" );
149         goto error;
150     }
151
152     vlc_object_attach( p_vout->p_sys->p_event, p_vout );
153
154     msg_Dbg( p_vout, "Vout EventThread running" );
155
156     /* Variable to indicate if the window should be on top of others */
157     /* Trigger a callback right now */
158     var_Get( p_vout, "video-on-top", &val );
159     var_Set( p_vout, "video-on-top", val );
160
161     return VLC_SUCCESS;
162
163  error:
164     CloseVideo( VLC_OBJECT(p_vout) );
165     return VLC_EGENERIC;
166 }
167
168 /*****************************************************************************
169  * Init: initialize video thread output method
170  *****************************************************************************/
171 static int Init( vout_thread_t *p_vout )
172 {
173     PIXELFORMATDESCRIPTOR pfd;
174     int iFormat;
175
176     /* Change the window title bar text */
177     PostMessage( p_vout->p_sys->hwnd, WM_VLC_CHANGE_TEXT, 0, 0 );
178
179     p_vout->p_sys->hGLDC = GetDC( p_vout->p_sys->hvideownd );
180
181     /* Set the pixel format for the DC */
182     memset( &pfd, 0, sizeof( pfd ) );
183     pfd.nSize = sizeof( pfd );
184     pfd.nVersion = 1;
185     pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
186     pfd.iPixelType = PFD_TYPE_RGBA;
187     pfd.cColorBits = 24;
188     pfd.cDepthBits = 16;
189     pfd.iLayerType = PFD_MAIN_PLANE;
190     iFormat = ChoosePixelFormat( p_vout->p_sys->hGLDC, &pfd );
191     SetPixelFormat( p_vout->p_sys->hGLDC, iFormat, &pfd );
192
193     /* Create and enable the render context */
194     p_vout->p_sys->hGLRC = wglCreateContext( p_vout->p_sys->hGLDC );
195     wglMakeCurrent( p_vout->p_sys->hGLDC, p_vout->p_sys->hGLRC );
196
197     return VLC_SUCCESS;
198 }
199
200 /*****************************************************************************
201  * End: terminate Sys video thread output method
202  *****************************************************************************
203  * Terminate an output method created by Create.
204  * It is called at the end of the thread.
205  *****************************************************************************/
206 static void End( vout_thread_t *p_vout )
207 {
208     wglMakeCurrent( NULL, NULL );
209     wglDeleteContext( p_vout->p_sys->hGLRC );
210     ReleaseDC( p_vout->p_sys->hvideownd, p_vout->p_sys->hGLDC );
211     return;
212 }
213
214 /*****************************************************************************
215  * CloseVideo: destroy Sys video thread output method
216  *****************************************************************************
217  * Terminate an output method created by Create
218  *****************************************************************************/
219 static void CloseVideo( vlc_object_t *p_this )
220 {
221     vout_thread_t * p_vout = (vout_thread_t *)p_this;
222
223     msg_Dbg( p_vout, "closing video" );
224
225     if( p_vout->p_sys->p_event )
226     {
227         vlc_object_detach( p_vout->p_sys->p_event );
228
229         /* Kill Vout EventThread */
230         vlc_object_kill( p_vout->p_sys->p_event );
231
232         /* we need to be sure Vout EventThread won't stay stuck in
233          * GetMessage, so we send a fake message */
234         if( p_vout->p_sys->hwnd )
235         {
236             PostMessage( p_vout->p_sys->hwnd, WM_NULL, 0, 0);
237         }
238
239         vlc_thread_join( p_vout->p_sys->p_event );
240         vlc_object_release( p_vout->p_sys->p_event );
241     }
242
243     vlc_mutex_destroy( &p_vout->p_sys->lock );
244
245     if( p_vout->p_sys )
246     {
247         free( p_vout->p_sys );
248         p_vout->p_sys = NULL;
249     }
250 }
251
252 /*****************************************************************************
253  * Manage: handle Sys events
254  *****************************************************************************
255  * This function should be called regularly by the video output thread.
256  * It returns a non null value if an error occurred.
257  *****************************************************************************/
258 static int Manage( vout_thread_t *p_vout )
259 {
260     int i_width = p_vout->p_sys->rect_dest.right -
261         p_vout->p_sys->rect_dest.left;
262     int i_height = p_vout->p_sys->rect_dest.bottom -
263         p_vout->p_sys->rect_dest.top;
264     glViewport( 0, 0, i_width, i_height );
265
266     /* If we do not control our window, we check for geometry changes
267      * ourselves because the parent might not send us its events. */
268     vlc_mutex_lock( &p_vout->p_sys->lock );
269     if( p_vout->p_sys->hparent && !p_vout->b_fullscreen )
270     {
271         RECT rect_parent;
272         POINT point;
273
274         vlc_mutex_unlock( &p_vout->p_sys->lock );
275
276         GetClientRect( p_vout->p_sys->hparent, &rect_parent );
277         point.x = point.y = 0;
278         ClientToScreen( p_vout->p_sys->hparent, &point );
279         OffsetRect( &rect_parent, point.x, point.y );
280
281         if( !EqualRect( &rect_parent, &p_vout->p_sys->rect_parent ) )
282         {
283             p_vout->p_sys->rect_parent = rect_parent;
284
285             /* This one is to force the update even if only
286              * the position has changed */
287             SetWindowPos( p_vout->p_sys->hwnd, 0, 1, 1,
288                           rect_parent.right - rect_parent.left,
289                           rect_parent.bottom - rect_parent.top, 0 );
290
291             SetWindowPos( p_vout->p_sys->hwnd, 0, 0, 0,
292                           rect_parent.right - rect_parent.left,
293                           rect_parent.bottom - rect_parent.top, 0 );
294         }
295     }
296     else
297     {
298         vlc_mutex_unlock( &p_vout->p_sys->lock );
299     }
300
301     /* Check for cropping / aspect changes */
302     if( p_vout->i_changes & VOUT_CROP_CHANGE ||
303         p_vout->i_changes & VOUT_ASPECT_CHANGE )
304     {
305         p_vout->i_changes &= ~VOUT_CROP_CHANGE;
306         p_vout->i_changes &= ~VOUT_ASPECT_CHANGE;
307
308         p_vout->fmt_out.i_x_offset = p_vout->fmt_in.i_x_offset;
309         p_vout->fmt_out.i_y_offset = p_vout->fmt_in.i_y_offset;
310         p_vout->fmt_out.i_visible_width = p_vout->fmt_in.i_visible_width;
311         p_vout->fmt_out.i_visible_height = p_vout->fmt_in.i_visible_height;
312         p_vout->fmt_out.i_aspect = p_vout->fmt_in.i_aspect;
313         p_vout->fmt_out.i_sar_num = p_vout->fmt_in.i_sar_num;
314         p_vout->fmt_out.i_sar_den = p_vout->fmt_in.i_sar_den;
315         p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
316         UpdateRects( p_vout, true );
317     }
318
319     /* We used to call the Win32 PeekMessage function here to read the window
320      * messages. But since window can stay blocked into this function for a
321      * long time (for example when you move your window on the screen), I
322      * decided to isolate PeekMessage in another thread. */
323
324     /*
325      * Fullscreen change
326      */
327     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE
328         || p_vout->p_sys->i_changes & VOUT_FULLSCREEN_CHANGE )
329     {
330         Win32ToggleFullscreen( p_vout );
331
332         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
333         p_vout->p_sys->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
334     }
335
336     /*
337      * Pointer change
338      */
339     if( p_vout->b_fullscreen && !p_vout->p_sys->b_cursor_hidden &&
340         (mdate() - p_vout->p_sys->i_lastmoved) >
341             p_vout->p_sys->i_mouse_hide_timeout )
342     {
343         POINT point;
344         HWND hwnd;
345
346         /* Hide the cursor only if it is inside our window */
347         GetCursorPos( &point );
348         hwnd = WindowFromPoint(point);
349         if( hwnd == p_vout->p_sys->hwnd || hwnd == p_vout->p_sys->hvideownd )
350         {
351             PostMessage( p_vout->p_sys->hwnd, WM_VLC_HIDE_MOUSE, 0, 0 );
352         }
353         else
354         {
355             p_vout->p_sys->i_lastmoved = mdate();
356         }
357     }
358
359     /*
360      * "Always on top" status change
361      */
362     if( p_vout->p_sys->b_on_top_change )
363     {
364         vlc_value_t val;
365         HMENU hMenu = GetSystemMenu( p_vout->p_sys->hwnd, FALSE );
366
367         var_Get( p_vout, "video-on-top", &val );
368
369         /* Set the window on top if necessary */
370         if( val.b_bool && !( GetWindowLong( p_vout->p_sys->hwnd, GWL_EXSTYLE )
371                            & WS_EX_TOPMOST ) )
372         {
373             CheckMenuItem( hMenu, IDM_TOGGLE_ON_TOP,
374                            MF_BYCOMMAND | MFS_CHECKED );
375             SetWindowPos( p_vout->p_sys->hwnd, HWND_TOPMOST, 0, 0, 0, 0,
376                           SWP_NOSIZE | SWP_NOMOVE );
377         }
378         else
379         /* The window shouldn't be on top */
380         if( !val.b_bool && ( GetWindowLong( p_vout->p_sys->hwnd, GWL_EXSTYLE )
381                            & WS_EX_TOPMOST ) )
382         {
383             CheckMenuItem( hMenu, IDM_TOGGLE_ON_TOP,
384                            MF_BYCOMMAND | MFS_UNCHECKED );
385             SetWindowPos( p_vout->p_sys->hwnd, HWND_NOTOPMOST, 0, 0, 0, 0,
386                           SWP_NOSIZE | SWP_NOMOVE );
387         }
388
389         p_vout->p_sys->b_on_top_change = false;
390     }
391
392     /* Check if the event thread is still running */
393     if( p_vout->p_sys->p_event->b_die )
394     {
395         return VLC_EGENERIC; /* exit */
396     }
397
398     return VLC_SUCCESS;
399 }
400
401 /*****************************************************************************
402  * GLSwapBuffers: swap front/back buffers
403  *****************************************************************************/
404 static void GLSwapBuffers( vout_thread_t *p_vout )
405 {
406     SwapBuffers( p_vout->p_sys->hGLDC );
407 }
408
409 /*
410 ** this function is only used once when the first picture is received
411 ** this function will show the video window once a picture is ready
412 */
413
414 static void FirstSwap( vout_thread_t *p_vout )
415 {
416     /* get initial picture buffer swapped to front buffer */
417     GLSwapBuffers( p_vout );
418
419     /*
420     ** Video window is initially hidden, show it now since we got a
421     ** picture to show.
422     */
423     SetWindowPos( p_vout->p_sys->hvideownd, NULL, 0, 0, 0, 0,
424         SWP_ASYNCWINDOWPOS|
425         SWP_FRAMECHANGED|
426         SWP_SHOWWINDOW|
427         SWP_NOMOVE|
428         SWP_NOSIZE|
429         SWP_NOZORDER );
430
431     /* use and restores proper swap function for further pictures */
432     p_vout->pf_swap = GLSwapBuffers;
433 }