1 /*****************************************************************************
2 * transform.c : transform image module for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2004 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
33 #include "filter_common.h"
35 #define TRANSFORM_MODE_HFLIP 1
36 #define TRANSFORM_MODE_VFLIP 2
37 #define TRANSFORM_MODE_90 3
38 #define TRANSFORM_MODE_180 4
39 #define TRANSFORM_MODE_270 5
41 /*****************************************************************************
43 *****************************************************************************/
44 static int Create ( vlc_object_t * );
45 static void Destroy ( vlc_object_t * );
47 static int Init ( vout_thread_t * );
48 static void End ( vout_thread_t * );
49 static void Render ( vout_thread_t *, picture_t * );
51 static int SendEvents( vlc_object_t *, char const *,
52 vlc_value_t, vlc_value_t, void * );
54 /*****************************************************************************
56 *****************************************************************************/
57 #define TYPE_TEXT N_("Transform type")
58 #define TYPE_LONGTEXT N_("One of '90', '180', '270', 'hflip' and 'vflip'")
60 static char *type_list[] = { "90", "180", "270", "hflip", "vflip" };
61 static char *type_list_text[] = { N_("Rotate by 90 degrees"),
62 N_("Rotate by 180 degrees"), N_("Rotate by 270 degrees"),
63 N_("Flip horizontally"), N_("Flip vertically") };
66 set_description( _("Video transformation filter") );
67 set_shortname( N_("Transformation"));
68 set_capability( "video filter", 0 );
69 set_category( CAT_VIDEO );
70 set_subcategory( SUBCAT_VIDEO_VFILTER );
72 add_string( "transform-type", "90", NULL,
73 TYPE_TEXT, TYPE_LONGTEXT, VLC_FALSE);
74 change_string_list( type_list, type_list_text, 0);
76 add_shortcut( "transform" );
77 set_callbacks( Create, Destroy );
80 /*****************************************************************************
81 * vout_sys_t: Transform video output method descriptor
82 *****************************************************************************
83 * This structure is part of the video output thread descriptor.
84 * It describes the Transform specific properties of an output thread.
85 *****************************************************************************/
89 vlc_bool_t b_rotation;
90 vout_thread_t *p_vout;
93 /*****************************************************************************
94 * Control: control facility for the vout (forwards to child vout)
95 *****************************************************************************/
96 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
98 return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
101 /*****************************************************************************
102 * Create: allocates Transform video thread output method
103 *****************************************************************************
104 * This function allocates and initializes a Transform vout method.
105 *****************************************************************************/
106 static int Create( vlc_object_t *p_this )
108 vout_thread_t *p_vout = (vout_thread_t *)p_this;
111 /* Allocate structure */
112 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
113 if( p_vout->p_sys == NULL )
115 msg_Err( p_vout, "out of memory" );
119 p_vout->pf_init = Init;
120 p_vout->pf_end = End;
121 p_vout->pf_manage = NULL;
122 p_vout->pf_render = Render;
123 p_vout->pf_display = NULL;
124 p_vout->pf_control = Control;
126 /* Look what method was requested */
127 psz_method = config_GetPsz( p_vout, "transform-type" );
129 if( psz_method == NULL )
131 msg_Err( p_vout, "configuration variable %s empty", "transform-type" );
132 msg_Err( p_vout, "no valid transform mode provided, using '90'" );
133 p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
134 p_vout->p_sys->b_rotation = 1;
138 if( !strcmp( psz_method, "hflip" ) )
140 p_vout->p_sys->i_mode = TRANSFORM_MODE_HFLIP;
141 p_vout->p_sys->b_rotation = 0;
143 else if( !strcmp( psz_method, "vflip" ) )
145 p_vout->p_sys->i_mode = TRANSFORM_MODE_VFLIP;
146 p_vout->p_sys->b_rotation = 0;
148 else if( !strcmp( psz_method, "90" ) )
150 p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
151 p_vout->p_sys->b_rotation = 1;
153 else if( !strcmp( psz_method, "180" ) )
155 p_vout->p_sys->i_mode = TRANSFORM_MODE_180;
156 p_vout->p_sys->b_rotation = 0;
158 else if( !strcmp( psz_method, "270" ) )
160 p_vout->p_sys->i_mode = TRANSFORM_MODE_270;
161 p_vout->p_sys->b_rotation = 1;
165 msg_Err( p_vout, "no valid transform mode provided, using '90'" );
166 p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
167 p_vout->p_sys->b_rotation = 1;
176 /*****************************************************************************
177 * Init: initialize Transform video thread output method
178 *****************************************************************************/
179 static int Init( vout_thread_t *p_vout )
183 video_format_t fmt = {0};
185 I_OUTPUTPICTURES = 0;
187 /* Initialize the output structure */
188 p_vout->output.i_chroma = p_vout->render.i_chroma;
189 p_vout->output.i_width = p_vout->render.i_width;
190 p_vout->output.i_height = p_vout->render.i_height;
191 p_vout->output.i_aspect = p_vout->render.i_aspect;
193 fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
194 fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
195 fmt.i_x_offset = fmt.i_y_offset = 0;
196 fmt.i_chroma = p_vout->render.i_chroma;
197 fmt.i_aspect = p_vout->render.i_aspect;
198 fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
199 fmt.i_sar_den = VOUT_ASPECT_FACTOR;
201 /* Try to open the real video output */
202 msg_Dbg( p_vout, "spawning the real video output" );
204 if( p_vout->p_sys->b_rotation )
206 fmt.i_width = fmt.i_visible_width = p_vout->render.i_height;
207 fmt.i_height = fmt.i_visible_height = p_vout->render.i_width;
208 fmt.i_aspect = VOUT_ASPECT_FACTOR *
209 (uint64_t)VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
210 fmt.i_sar_num = VOUT_ASPECT_FACTOR;
211 fmt.i_sar_den = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
213 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
217 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
220 /* Everything failed */
221 if( p_vout->p_sys->p_vout == NULL )
223 msg_Err( p_vout, "cannot open vout, aborting" );
227 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
229 ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
231 ADD_PARENT_CALLBACKS( SendEventsToChild );
236 /*****************************************************************************
237 * End: terminate Transform video thread output method
238 *****************************************************************************/
239 static void End( vout_thread_t *p_vout )
243 /* Free the fake output buffers we allocated */
244 for( i_index = I_OUTPUTPICTURES ; i_index ; )
247 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
251 /*****************************************************************************
252 * Destroy: destroy Transform video thread output method
253 *****************************************************************************
254 * Terminate an output method created by TransformCreateOutputMethod
255 *****************************************************************************/
256 static void Destroy( vlc_object_t *p_this )
258 vout_thread_t *p_vout = (vout_thread_t *)p_this;
260 if( p_vout->p_sys->p_vout )
262 DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
263 vlc_object_detach( p_vout->p_sys->p_vout );
264 vout_Destroy( p_vout->p_sys->p_vout );
267 DEL_PARENT_CALLBACKS( SendEventsToChild );
269 free( p_vout->p_sys );
272 /*****************************************************************************
273 * Render: displays previously rendered output
274 *****************************************************************************
275 * This function send the currently rendered image to Transform image, waits
276 * until it is displayed and switch the two rendering buffers, preparing next
278 *****************************************************************************/
279 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
284 /* This is a new frame. Get a structure from the video_output. */
285 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
288 if( p_vout->b_die || p_vout->b_error )
292 msleep( VOUT_OUTMEM_SLEEP );
295 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
296 vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
298 switch( p_vout->p_sys->i_mode )
300 case TRANSFORM_MODE_90:
301 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
303 int i_pitch = p_pic->p[i_index].i_pitch;
305 uint8_t *p_in = p_pic->p[i_index].p_pixels;
307 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
308 uint8_t *p_out_end = p_out +
309 p_outpic->p[i_index].i_visible_lines *
310 p_outpic->p[i_index].i_pitch;
312 for( ; p_out < p_out_end ; )
316 p_out_end -= p_outpic->p[i_index].i_pitch
317 - p_outpic->p[i_index].i_visible_pitch;
318 p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
321 for( ; p_in < p_line_end ; )
323 p_line_end -= i_pitch;
324 *(--p_out_end) = *p_line_end;
332 case TRANSFORM_MODE_180:
333 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
335 uint8_t *p_in = p_pic->p[i_index].p_pixels;
336 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
337 * p_pic->p[i_index].i_pitch;
339 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
341 for( ; p_in < p_in_end ; )
343 uint8_t *p_line_start = p_in_end
344 - p_pic->p[i_index].i_pitch;
345 p_in_end -= p_pic->p[i_index].i_pitch
346 - p_pic->p[i_index].i_visible_pitch;
348 for( ; p_line_start < p_in_end ; )
350 *p_out++ = *(--p_in_end);
353 p_out += p_outpic->p[i_index].i_pitch
354 - p_outpic->p[i_index].i_visible_pitch;
359 case TRANSFORM_MODE_270:
360 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
362 int i_pitch = p_pic->p[i_index].i_pitch;
364 uint8_t *p_in = p_pic->p[i_index].p_pixels;
366 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
367 uint8_t *p_out_end = p_out +
368 p_outpic->p[i_index].i_visible_lines *
369 p_outpic->p[i_index].i_pitch;
371 for( ; p_out < p_out_end ; )
375 p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
378 for( ; p_in < p_in_end ; )
381 *p_out++ = *p_in_end;
384 p_out += p_outpic->p[i_index].i_pitch
385 - p_outpic->p[i_index].i_visible_pitch;
391 case TRANSFORM_MODE_HFLIP:
392 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
394 uint8_t *p_in = p_pic->p[i_index].p_pixels;
395 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
396 * p_pic->p[i_index].i_pitch;
398 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
400 for( ; p_in < p_in_end ; )
402 p_in_end -= p_pic->p[i_index].i_pitch;
403 p_vout->p_vlc->pf_memcpy( p_out, p_in_end,
404 p_pic->p[i_index].i_visible_pitch );
405 p_out += p_pic->p[i_index].i_pitch;
410 case TRANSFORM_MODE_VFLIP:
411 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
413 uint8_t *p_in = p_pic->p[i_index].p_pixels;
414 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
415 * p_pic->p[i_index].i_pitch;
417 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
419 for( ; p_in < p_in_end ; )
421 uint8_t *p_line_end = p_in
422 + p_pic->p[i_index].i_visible_pitch;
424 for( ; p_in < p_line_end ; )
426 *p_out++ = *(--p_line_end);
429 p_in += p_pic->p[i_index].i_pitch;
438 vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
440 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
443 /*****************************************************************************
444 * SendEvents: forward mouse and keyboard events to the parent p_vout
445 *****************************************************************************/
446 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
447 vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
449 vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
450 vlc_value_t sentval = newval;
452 /* Translate the mouse coordinates */
453 if( !strcmp( psz_var, "mouse-x" ) )
455 switch( p_vout->p_sys->i_mode )
457 case TRANSFORM_MODE_270:
458 sentval.i_int = p_vout->p_sys->p_vout->output.i_width
460 case TRANSFORM_MODE_90:
461 var_Set( p_vout, "mouse-y", sentval );
464 case TRANSFORM_MODE_180:
465 case TRANSFORM_MODE_HFLIP:
466 sentval.i_int = p_vout->p_sys->p_vout->output.i_width
470 case TRANSFORM_MODE_VFLIP:
475 else if( !strcmp( psz_var, "mouse-y" ) )
477 switch( p_vout->p_sys->i_mode )
479 case TRANSFORM_MODE_90:
480 sentval.i_int = p_vout->p_sys->p_vout->output.i_height
482 case TRANSFORM_MODE_270:
483 var_Set( p_vout, "mouse-x", sentval );
486 case TRANSFORM_MODE_180:
487 case TRANSFORM_MODE_VFLIP:
488 sentval.i_int = p_vout->p_sys->p_vout->output.i_height
492 case TRANSFORM_MODE_HFLIP:
498 var_Set( p_vout, psz_var, sentval );
503 /*****************************************************************************
504 * SendEventsToChild: forward events to the child/children vout
505 *****************************************************************************/
506 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
507 vlc_value_t oldval, vlc_value_t newval, void *p_data )
509 vout_thread_t *p_vout = (vout_thread_t *)p_this;
510 var_Set( p_vout->p_sys->p_vout, psz_var, newval );