1 /*****************************************************************************
2 * screen.c: Screen capture module.
3 *****************************************************************************
4 * Copyright (C) 2004-2008 VLC authors and VideoLAN
7 * Authors: Gildas Bazin <gbazin@videolan.org>
8 * Antoine Cellerier <dionoea at videolan dot org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_modules.h> /* module_need for "video blending" */
38 /*****************************************************************************
40 *****************************************************************************/
41 #define FPS_TEXT N_("Frame rate")
42 #define FPS_LONGTEXT N_( \
43 "Desired frame rate for the capture." )
46 #define FRAGS_TEXT N_("Capture fragment size")
47 #define FRAGS_LONGTEXT N_( \
48 "Optimize the capture by fragmenting the screen in chunks " \
49 "of predefined height (16 might be a good value, and 0 means disabled)." )
52 #ifdef SCREEN_SUBSCREEN
53 #define TOP_TEXT N_( "Subscreen top left corner" )
54 #define TOP_LONGTEXT N_( \
55 "Top coordinate of the subscreen top left corner." )
57 #define LEFT_TEXT N_( "Subscreen top left corner" )
58 #define LEFT_LONGTEXT N_( \
59 "Left coordinate of the subscreen top left corner." )
61 #define WIDTH_TEXT N_( "Subscreen width" )
63 #define HEIGHT_TEXT N_( "Subscreen height" )
65 #define FOLLOW_MOUSE_TEXT N_( "Follow the mouse" )
66 #define FOLLOW_MOUSE_LONGTEXT N_( \
67 "Follow the mouse when capturing a subscreen." )
71 #define MOUSE_TEXT N_( "Mouse pointer image" )
72 #define MOUSE_LONGTEXT N_( \
73 "If specified, will use the image to draw the mouse pointer on the " \
77 #ifdef SCREEN_DISPLAY_ID
78 #define DISPLAY_ID_TEXT N_( "Display ID" )
79 #define DISPLAY_ID_LONGTEXT N_( \
80 "Display ID. If not specified, main display ID is used. " )
81 #define INDEX_TEXT N_( "Screen index" )
82 #define INDEX_LONGTEXT N_( \
83 "Index of screen (1, 2, 3, ...). Alternative to Display ID." )
86 static int Open ( vlc_object_t * );
87 static void Close( vlc_object_t * );
96 set_description( N_("Screen Input") )
97 set_shortname( N_("Screen" ))
98 set_category( CAT_INPUT )
99 set_subcategory( SUBCAT_INPUT_ACCESS )
101 add_float( "screen-fps", SCREEN_FPS, FPS_TEXT, FPS_LONGTEXT, false )
103 #ifdef SCREEN_SUBSCREEN
104 add_integer( "screen-top", 0, TOP_TEXT, TOP_LONGTEXT, true )
105 add_integer( "screen-left", 0, LEFT_TEXT, LEFT_LONGTEXT, true )
106 add_integer( "screen-width", 0, WIDTH_TEXT, WIDTH_TEXT, true )
107 add_integer( "screen-height", 0, HEIGHT_TEXT, HEIGHT_TEXT, true )
109 add_bool( "screen-follow-mouse", false, FOLLOW_MOUSE_TEXT,
110 FOLLOW_MOUSE_LONGTEXT, false )
114 add_loadfile( "screen-mouse-image", "", MOUSE_TEXT, MOUSE_LONGTEXT, true )
118 add_integer( "screen-fragment-size", 0, FRAGS_TEXT, FRAGS_LONGTEXT, true )
121 #ifdef SCREEN_DISPLAY_ID
122 add_integer( "screen-display-id", 0, DISPLAY_ID_TEXT, DISPLAY_ID_LONGTEXT, true )
123 add_integer( "screen-index", 0, INDEX_TEXT, INDEX_LONGTEXT, true )
126 set_capability( "access_demux", 0 )
127 add_shortcut( "screen" )
128 set_callbacks( Open, Close )
131 /*****************************************************************************
133 *****************************************************************************/
134 static int Control( demux_t *, int, va_list );
135 static int Demux ( demux_t * );
137 /*****************************************************************************
139 *****************************************************************************/
140 static int Open( vlc_object_t *p_this )
142 demux_t *p_demux = (demux_t*)p_this;
145 /* Fill p_demux field */
146 p_demux->pf_demux = Demux;
147 p_demux->pf_control = Control;
148 p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
152 p_sys->f_fps = var_CreateGetFloat( p_demux, "screen-fps" );
153 p_sys->i_incr = 1000000 / p_sys->f_fps;;
154 p_sys->i_next_date = 0;
156 #ifdef SCREEN_SUBSCREEN
157 p_sys->i_top = var_CreateGetInteger( p_demux, "screen-top" );
158 p_sys->i_left = var_CreateGetInteger( p_demux, "screen-left" );
159 p_sys->i_width = var_CreateGetInteger( p_demux, "screen-width" );
160 p_sys->i_height = var_CreateGetInteger( p_demux, "screen-height" );
161 if( p_sys->i_width > 0 && p_sys->i_height > 0 )
162 msg_Dbg( p_demux, "capturing subscreen top: %d, left: %d, "
163 "width: %d, height: %d",
170 #ifdef SCREEN_DISPLAY_ID
171 p_sys->i_display_id = var_CreateGetInteger( p_demux, "screen-display-id" );
172 p_sys->i_screen_index = var_CreateGetInteger( p_demux, "screen-index" );
175 if( screen_InitCapture( p_demux ) != VLC_SUCCESS )
181 msg_Dbg( p_demux, "screen width: %i, height: %i, depth: %i",
182 p_sys->fmt.video.i_width, p_sys->fmt.video.i_height,
183 p_sys->fmt.video.i_bits_per_pixel );
185 #ifdef SCREEN_SUBSCREEN
186 if( p_sys->i_width > 0 && p_sys->i_height > 0 )
188 if( p_sys->i_left + p_sys->i_width > p_sys->fmt.video.i_width ||
189 p_sys->i_top + p_sys->i_height > p_sys->fmt.video.i_height )
191 msg_Err( p_demux, "subscreen region overflows the screen" );
197 p_sys->i_screen_width = p_sys->fmt.video.i_width;
198 p_sys->i_screen_height = p_sys->fmt.video.i_height;
199 p_sys->fmt.video.i_visible_width =
200 p_sys->fmt.video.i_width = p_sys->i_width;
201 p_sys->fmt.video.i_visible_height =
202 p_sys->fmt.video.i_height = p_sys->i_height;
203 p_sys->b_follow_mouse = var_CreateGetBool( p_demux,
204 "screen-follow-mouse" );
205 if( p_sys->b_follow_mouse )
206 msg_Dbg( p_demux, "mouse following enabled" );
212 char * psz_mouse = var_CreateGetNonEmptyString( p_demux,
213 "screen-mouse-image" );
216 image_handler_t *p_image;
217 video_format_t fmt_in, fmt_out;
218 msg_Dbg( p_demux, "Using %s for the mouse pointer image", psz_mouse );
219 memset( &fmt_in, 0, sizeof( fmt_in ) );
220 memset( &fmt_out, 0, sizeof( fmt_out ) );
221 fmt_out.i_chroma = VLC_CODEC_RGBA;
222 p_image = image_HandlerCreate( p_demux );
226 image_ReadUrl( p_image, psz_mouse, &fmt_in, &fmt_out );
227 image_HandlerDelete( p_image );
229 if( !p_sys->p_mouse )
230 msg_Err( p_demux, "Failed to open mouse pointer image (%s)",
236 p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt );
238 p_sys->i_start = mdate();
243 /*****************************************************************************
245 *****************************************************************************/
246 static void Close( vlc_object_t *p_this )
248 demux_t *p_demux = (demux_t*)p_this;
249 demux_sys_t *p_sys = p_demux->p_sys;
251 screen_CloseCapture( p_demux );
254 picture_Release( p_sys->p_mouse );
259 /*****************************************************************************
261 *****************************************************************************/
262 static int Demux( demux_t *p_demux )
264 demux_sys_t *p_sys = p_demux->p_sys;
267 if( !p_sys->i_next_date ) p_sys->i_next_date = mdate();
269 /* Frame skipping if necessary */
270 while( mdate() >= p_sys->i_next_date + p_sys->i_incr )
271 p_sys->i_next_date += p_sys->i_incr;
273 mwait( p_sys->i_next_date );
274 p_block = screen_Capture( p_demux );
277 p_sys->i_next_date += p_sys->i_incr;
281 p_block->i_dts = p_block->i_pts = p_sys->i_next_date;
283 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
284 es_out_Send( p_demux->out, p_sys->es, p_block );
286 p_sys->i_next_date += p_sys->i_incr;
291 /*****************************************************************************
293 *****************************************************************************/
294 static int Control( demux_t *p_demux, int i_query, va_list args )
298 demux_sys_t *p_sys = p_demux->p_sys;
302 /* Special for access_demux */
303 case DEMUX_CAN_PAUSE:
305 case DEMUX_CAN_CONTROL_PACE:
307 pb = (bool*)va_arg( args, bool * );
311 case DEMUX_GET_PTS_DELAY:
312 pi64 = (int64_t*)va_arg( args, int64_t * );
313 *pi64 = INT64_C(1000)
314 * var_InheritInteger( p_demux, "live-caching" );
318 pi64 = (int64_t*)va_arg( args, int64_t * );
319 *pi64 = mdate() - p_sys->i_start;
322 /* TODO implement others */
328 #ifdef SCREEN_SUBSCREEN
329 void FollowMouse( demux_sys_t *p_sys, int i_x, int i_y )
331 i_x -= p_sys->i_width/2;
332 if( i_x < 0 ) i_x = 0;
333 p_sys->i_left = __MIN( (unsigned int)i_x,
334 p_sys->i_screen_width - p_sys->i_width );
336 i_y -= p_sys->i_height/2;
337 if( i_y < 0 ) i_y = 0;
338 p_sys->i_top = __MIN( (unsigned int)i_y,
339 p_sys->i_screen_height - p_sys->i_height );
344 void RenderCursor( demux_t *p_demux, int i_x, int i_y,
347 demux_sys_t *p_sys = p_demux->p_sys;
348 if( !p_sys->dst.i_planes )
349 picture_Setup( &p_sys->dst,
350 p_sys->fmt.video.i_chroma,
351 p_sys->fmt.video.i_width,
352 p_sys->fmt.video.i_height,
353 p_sys->fmt.video.i_sar_num,
354 p_sys->fmt.video.i_sar_den );
355 if( !p_sys->p_blend )
357 p_sys->p_blend = vlc_object_create( p_demux, sizeof(filter_t) );
360 es_format_Init( &p_sys->p_blend->fmt_in, VIDEO_ES,
362 p_sys->p_blend->fmt_in.video = p_sys->p_mouse->format;
363 p_sys->p_blend->fmt_out = p_sys->fmt;
364 p_sys->p_blend->p_module =
365 module_need( p_sys->p_blend, "video blending", NULL, false );
366 if( !p_sys->p_blend->p_module )
368 msg_Err( p_demux, "Could not load video blending module" );
369 vlc_object_release( p_sys->p_blend );
370 p_sys->p_blend = NULL;
376 p_sys->dst.p->p_pixels = p_dst;
377 p_sys->p_blend->pf_video_blend( p_sys->p_blend,
380 #ifdef SCREEN_SUBSCREEN
385 #ifdef SCREEN_SUBSCREEN
394 picture_Release( p_sys->p_mouse );
395 p_sys->p_mouse = NULL;