1 /*****************************************************************************
2 * wall.c : Wall video plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2009 the VideoLAN team
7 * Authors: Samuel Hocevar <sam@zoy.org>
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.
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.
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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include "vlc_video_splitter.h"
37 /* FIXME it is needed for VOUT_ALIGN_* only */
40 /*****************************************************************************
42 *****************************************************************************/
43 #define COLS_TEXT N_("Number of columns")
44 #define COLS_LONGTEXT N_("Number of horizontal windows in " \
45 "which to split the video.")
47 #define ROWS_TEXT N_("Number of rows")
48 #define ROWS_LONGTEXT N_("Number of vertical windows in " \
49 "which to split the video.")
51 #define ACTIVE_TEXT N_("Active windows")
52 #define ACTIVE_LONGTEXT N_("Comma-separated list of active windows, " \
55 #define ASPECT_TEXT N_("Element aspect ratio")
56 #define ASPECT_LONGTEXT N_("Aspect ratio of the individual displays " \
59 #define CFG_PREFIX "wall-"
61 static int Open ( vlc_object_t * );
62 static void Close( vlc_object_t * );
65 set_description( N_("Wall video filter") )
66 set_shortname( N_("Image wall" ))
67 set_capability( "video splitter", 0 )
68 set_category( CAT_VIDEO )
69 set_subcategory( SUBCAT_VIDEO_VFILTER )
71 add_integer( CFG_PREFIX "cols", 3, NULL, COLS_TEXT, COLS_LONGTEXT, false )
72 add_integer( CFG_PREFIX "rows", 3, NULL, ROWS_TEXT, ROWS_LONGTEXT, false )
73 add_string( CFG_PREFIX "active", NULL, NULL, ACTIVE_TEXT, ACTIVE_LONGTEXT,
75 add_string( CFG_PREFIX "element-aspect", "4:3", NULL, ASPECT_TEXT, ASPECT_LONGTEXT, false )
77 add_shortcut( "wall" )
78 set_callbacks( Open, Close )
81 /*****************************************************************************
83 *****************************************************************************/
84 static const char *const ppsz_filter_options[] = {
85 "cols", "rows", "active", "element-aspect", NULL
102 struct video_splitter_sys_t
107 wall_output_t pp_output[ROW_MAX][COL_MAX]; /* [x][y] */
110 static int Filter( video_splitter_t *, picture_t *pp_dst[], picture_t * );
111 static int Mouse( video_splitter_t *, vlc_mouse_t *,
113 const vlc_mouse_t *p_old, const vlc_mouse_t *p_new );
116 * This function allocates and initializes a Wall splitter module.
118 static int Open( vlc_object_t *p_this )
120 video_splitter_t *p_splitter = (video_splitter_t*)p_this;
121 video_splitter_sys_t *p_sys;
123 p_splitter->p_sys = p_sys = malloc( sizeof(*p_sys) );
127 config_ChainParse( p_splitter, CFG_PREFIX, ppsz_filter_options,
131 p_sys->i_col = var_CreateGetInteger( p_splitter, CFG_PREFIX "cols" );
132 p_sys->i_col = __MAX( 1, __MIN( COL_MAX, p_sys->i_col ) );
134 p_sys->i_row = var_CreateGetInteger( p_splitter, CFG_PREFIX "rows" );
135 p_sys->i_row = __MAX( 1, __MIN( ROW_MAX, p_sys->i_row ) );
137 msg_Dbg( p_splitter, "opening a %i x %i wall",
138 p_sys->i_col, p_sys->i_row );
141 char *psz_state = var_CreateGetNonEmptyString( p_splitter, CFG_PREFIX "active" );
144 bool pb_active[COL_MAX*ROW_MAX];
145 for( int i = 0; i < COL_MAX*ROW_MAX; i++ )
146 pb_active[i] = psz_state == NULL;
148 /* Parse active list if provided */
149 char *psz_tmp = psz_state;
150 while( psz_tmp && *psz_tmp )
152 char *psz_next = strchr( psz_tmp, ',' );
156 const int i_index = atoi( psz_tmp );
157 if( i_index >= 0 && i_index < COL_MAX*ROW_MAX )
158 pb_active[i_index] = true;
162 /* Parse aspect ratio if provided */
164 char *psz_aspect = var_CreateGetNonEmptyString( p_splitter,
165 CFG_PREFIX "element-aspect" );
168 int i_ar_num, i_ar_den;
169 if( sscanf( psz_aspect, "%d:%d", &i_ar_num, &i_ar_den ) == 2 &&
170 i_ar_num > 0 && i_ar_den > 0 )
172 i_aspect = i_ar_num * VOUT_ASPECT_FACTOR / i_ar_den;
176 msg_Warn( p_splitter, "invalid aspect ratio specification" );
181 i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
183 /* Compute placements/size of the windows */
184 const unsigned w1 = ( p_splitter->fmt.i_width / p_sys->i_col ) & ~1;
185 const unsigned h1 = ( w1 * VOUT_ASPECT_FACTOR / i_aspect ) & ~1;
187 const unsigned h2 = ( p_splitter->fmt.i_height / p_sys->i_row ) & ~1;
188 const unsigned w2 = ( h2 * i_aspect / VOUT_ASPECT_FACTOR ) & ~1;
190 unsigned i_target_width;
191 unsigned i_target_height;
192 unsigned i_hstart, i_hend;
193 unsigned i_vstart, i_vend;
194 bool b_vstart_rounded;
195 bool b_hstart_rounded;
197 if( h1 * p_sys->i_row < p_splitter->fmt.i_height )
200 i_target_height = h2;
203 b_vstart_rounded = false;
204 i_vend = p_splitter->fmt.i_height;
206 unsigned i_tmp = i_target_width * p_sys->i_col;
207 while( i_tmp < p_splitter->fmt.i_width )
208 i_tmp += p_sys->i_col;
210 i_hstart = (( i_tmp - p_splitter->fmt.i_width ) / 2)&~1;
211 b_hstart_rounded = ( ( i_tmp - p_splitter->fmt.i_width ) % 2 ) ||
212 ( ( ( i_tmp - p_splitter->fmt.i_width ) / 2 ) & 1 );
213 i_hend = i_hstart + p_splitter->fmt.i_width;
217 i_target_height = h1;
221 b_hstart_rounded = false;
222 i_hend = p_splitter->fmt.i_width;
224 unsigned i_tmp = i_target_height * p_sys->i_row;
225 while( i_tmp < p_splitter->fmt.i_height )
226 i_tmp += p_sys->i_row;
228 i_vstart = ( ( i_tmp - p_splitter->fmt.i_height ) / 2 ) & ~1;
229 b_vstart_rounded = ( ( i_tmp - p_splitter->fmt.i_height ) % 2 ) ||
230 ( ( ( i_tmp - p_splitter->fmt.i_height ) / 2 ) & 1 );
231 i_vend = i_vstart + p_splitter->fmt.i_height;
233 msg_Dbg( p_splitter, "target resolution %dx%d", i_target_width, i_target_height );
234 msg_Dbg( p_splitter, "target window (%d,%d)-(%d,%d)", i_hstart,i_vstart,i_hend,i_vend );
237 for( int y = 0, i_top = 0; y < p_sys->i_row; y++ )
242 if( y * i_target_height >= i_vstart &&
243 ( y + 1 ) * i_target_height <= i_vend )
245 i_height = i_target_height;
247 else if( ( y + 1 ) * i_target_height < i_vstart ||
248 ( y * i_target_height ) > i_vend )
254 i_height = ( i_target_height -
255 i_vstart%i_target_height );
256 if( y >= ( p_sys->i_row / 2 ) )
258 i_halign = VOUT_ALIGN_TOP;
259 i_height -= b_vstart_rounded ? 2: 0;
263 i_halign = VOUT_ALIGN_BOTTOM;
268 for( int x = 0, i_left = 0; x < p_sys->i_col; x++ )
270 wall_output_t *p_output = &p_sys->pp_output[x][y];
275 if( x*i_target_width >= i_hstart &&
276 (x+1)*i_target_width <= i_hend )
278 i_width = i_target_width;
280 else if( ( x + 1 ) * i_target_width < i_hstart ||
281 ( x * i_target_width ) > i_hend )
287 i_width = ( i_target_width - i_hstart % i_target_width );
288 if( x >= ( p_sys->i_col / 2 ) )
290 i_valign = VOUT_ALIGN_LEFT;
291 i_width -= b_hstart_rounded ? 2: 0;
295 i_valign = VOUT_ALIGN_RIGHT;
300 p_output->b_active = pb_active[y * p_sys->i_col + x] &&
301 i_height > 0 && i_width > 0;
302 p_output->i_output = -1;
303 p_output->i_align = i_valign | i_halign;
304 p_output->i_width = i_width;
305 p_output->i_height = i_height;
306 p_output->i_left = i_left;
307 p_output->i_top = i_top;
309 msg_Dbg( p_splitter, "window %dx%d at %d:%d size %dx%d",
310 x, y, i_left, i_top, i_width, i_height );
312 if( p_output->b_active )
321 msg_Err( p_splitter, "No active video output" );
326 /* Setup output configuration */
327 p_splitter->i_output = i_active;
328 p_splitter->p_output = calloc( p_splitter->i_output,
329 sizeof(*p_splitter->p_output) );
330 if( !p_splitter->p_output )
335 for( int y = 0, i_output = 0; y < p_sys->i_row; y++ )
337 for( int x = 0; x < p_sys->i_col; x++ )
339 wall_output_t *p_output = &p_sys->pp_output[x][y];
340 if( !p_output->b_active )
343 p_output->i_output = i_output++;
345 video_splitter_output_t *p_cfg = &p_splitter->p_output[p_output->i_output];
347 video_format_Copy( &p_cfg->fmt, &p_splitter->fmt );
348 p_cfg->fmt.i_visible_width =
349 p_cfg->fmt.i_width = p_output->i_width;
350 p_cfg->fmt.i_visible_height =
351 p_cfg->fmt.i_height = p_output->i_height;
352 p_cfg->fmt.i_aspect = (int64_t)i_aspect * i_target_height * p_output->i_width / i_target_width / p_output->i_height;
354 p_cfg->window.i_x = p_output->i_left; /* FIXME relative to video-x/y (TODO in wrapper.c) ? */
355 p_cfg->window.i_y = p_output->i_top;
356 p_cfg->window.i_align = p_output->i_align;
357 p_cfg->psz_module = NULL;
362 p_splitter->pf_filter = Filter;
363 p_splitter->pf_mouse = Mouse;
369 * Terminate a splitter module.
371 static void Close( vlc_object_t *p_this )
373 video_splitter_t *p_splitter = (video_splitter_t*)p_this;
374 video_splitter_sys_t *p_sys = p_splitter->p_sys;
376 free( p_splitter->p_output );
380 static int Filter( video_splitter_t *p_splitter, picture_t *pp_dst[], picture_t *p_src )
382 video_splitter_sys_t *p_sys = p_splitter->p_sys;
384 if( video_splitter_NewPicture( p_splitter, pp_dst ) )
387 for( int y = 0; y < p_sys->i_row; y++ )
389 for( int x = 0; x < p_sys->i_col; x++ )
391 wall_output_t *p_output = &p_sys->pp_output[x][y];
392 if( !p_output->b_active )
395 video_splitter_output_t *p_cfg = &p_splitter->p_output[p_output->i_output];
396 picture_t *p_dst = pp_dst[p_output->i_output];
399 picture_t tmp = *p_src;
400 for( int i = 0; i < tmp.i_planes; i++ )
402 plane_t *p0 = &tmp.p[0];
403 plane_t *p = &tmp.p[i];
404 const int i_y = p_output->i_top * p->i_visible_pitch / p0->i_visible_pitch;
405 const int i_x = p_output->i_left * p->i_visible_lines / p0->i_visible_lines;
407 p->p_pixels += i_y * p->i_pitch + ( i_x - (i_x % p->i_pixel_pitch));
409 picture_Copy( p_dst, &tmp );
413 picture_Release( p_src );
416 static int Mouse( video_splitter_t *p_splitter, vlc_mouse_t *p_mouse,
418 const vlc_mouse_t *p_old, const vlc_mouse_t *p_new )
420 video_splitter_sys_t *p_sys = p_splitter->p_sys;
422 for( int y = 0; y < p_sys->i_row; y++ )
424 for( int x = 0; x < p_sys->i_col; x++ )
426 wall_output_t *p_output = p_output = &p_sys->pp_output[x][y];
427 if( p_output->b_active && p_output->i_output == i_index )
430 p_mouse->i_x += p_output->i_left;
431 p_mouse->i_y += p_output->i_top;