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[vlc] / modules / video_output / caca.c
1 /*****************************************************************************
2  * caca.c: Color ASCII Art video output plugin using libcaca
3  *****************************************************************************
4  * Copyright (C) 2003-2009 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Sam Hocevar <sam@zoy.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 /*****************************************************************************
25  * Preamble
26  *****************************************************************************/
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_vout.h>
35 #include <vlc_interface.h>
36 #include <vlc_playlist.h>
37 #include <vlc_keys.h>
38
39 #include <caca.h>
40
41 #ifndef CACA_API_VERSION_1
42     /* Upward compatibility macros */
43     typedef char cucul_canvas_t;
44     typedef struct caca_bitmap cucul_dither_t;
45     typedef char caca_display_t;
46 #   define CUCUL_COLOR_DEFAULT CACA_COLOR_LIGHTGRAY
47 #   define CUCUL_COLOR_BLACK CACA_COLOR_BLACK
48 #   define cucul_clear_canvas(x) caca_clear()
49 #   define cucul_create_canvas(x,y) "" /* kinda hacky */
50 #   define cucul_create_dither caca_create_bitmap
51 #   define cucul_dither_bitmap(x,y,z,t,u,v,w) caca_draw_bitmap(y,z,t,u,v,w)
52 #   define cucul_free_dither caca_free_bitmap
53 #   define cucul_free_canvas(x)
54 #   define cucul_get_canvas_width(x) caca_get_width()
55 #   define cucul_get_canvas_height(x) caca_get_height()
56 #   define cucul_set_color(x,y,z) caca_set_color(y,z)
57 #   define caca_create_display(x) (caca_init() ? NULL : "") /* hacky, too */
58 #   define caca_free_display(x) caca_end()
59 #   define caca_get_event(x,y,z,t) *(z) = caca_get_event(y)
60 #   define caca_refresh_display(x) caca_refresh()
61 #   define caca_set_display_title(x,y) caca_set_window_title(y)
62 #endif
63
64 /*****************************************************************************
65  * Local prototypes
66  *****************************************************************************/
67 static int  Create    ( vlc_object_t * );
68 static void Destroy   ( vlc_object_t * );
69
70 static int  Init      ( vout_thread_t * );
71 static void End       ( vout_thread_t * );
72 static int  Manage    ( vout_thread_t * );
73 static void Render    ( vout_thread_t *, picture_t * );
74 static void Display   ( vout_thread_t *, picture_t * );
75
76 /*****************************************************************************
77  * Module descriptor
78  *****************************************************************************/
79 vlc_module_begin ()
80     set_shortname( "Caca" )
81     set_category( CAT_VIDEO )
82     set_subcategory( SUBCAT_VIDEO_VOUT )
83     set_description( N_("Color ASCII art video output") )
84     set_capability( "video output", 12 )
85     set_callbacks( Create, Destroy )
86 vlc_module_end ()
87
88 /*****************************************************************************
89  * vout_sys_t: libcaca video output method descriptor
90  *****************************************************************************
91  * This structure is part of the video output thread descriptor.
92  * It describes the libcaca specific properties of an output thread.
93  *****************************************************************************/
94 struct vout_sys_t
95 {
96     cucul_canvas_t *p_cv;
97     caca_display_t *p_dp;
98     cucul_dither_t *p_dither;
99 };
100
101 /*****************************************************************************
102  * Create: allocates libcaca video output thread
103  *****************************************************************************
104  * This function initializes libcaca vout method.
105  *****************************************************************************/
106 static int Create( vlc_object_t *p_this )
107 {
108     vout_thread_t *p_vout = (vout_thread_t *)p_this;
109
110 #if defined( WIN32 ) && !defined( UNDER_CE )
111     CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
112     SMALL_RECT rect;
113     COORD coord;
114     HANDLE hstdout;
115
116     if( !AllocConsole() )
117     {
118         msg_Err( p_vout, "cannot create console" );
119         return VLC_EGENERIC;
120     }
121
122     hstdout =
123         CreateConsoleScreenBuffer( GENERIC_READ | GENERIC_WRITE,
124                                    FILE_SHARE_READ | FILE_SHARE_WRITE,
125                                    NULL, CONSOLE_TEXTMODE_BUFFER, NULL );
126     if( !hstdout || hstdout == INVALID_HANDLE_VALUE )
127     {
128         msg_Err( p_vout, "cannot create screen buffer" );
129         FreeConsole();
130         return VLC_EGENERIC;
131     }
132
133     if( !SetConsoleActiveScreenBuffer( hstdout) )
134     {
135         msg_Err( p_vout, "cannot set active screen buffer" );
136         FreeConsole();
137         return VLC_EGENERIC;
138     }
139
140     coord = GetLargestConsoleWindowSize( hstdout );
141     msg_Dbg( p_vout, "SetConsoleWindowInfo: %ix%i", coord.X, coord.Y );
142
143     /* Force size for now */
144     coord.X = 100;
145     coord.Y = 40;
146
147     if( !SetConsoleScreenBufferSize( hstdout, coord ) )
148         msg_Warn( p_vout, "SetConsoleScreenBufferSize %i %i",
149                   coord.X, coord.Y );
150
151     /* Get the current screen buffer size and window position. */
152     if( GetConsoleScreenBufferInfo( hstdout, &csbiInfo ) )
153     {
154         rect.Top = 0; rect.Left = 0;
155         rect.Right = csbiInfo.dwMaximumWindowSize.X - 1;
156         rect.Bottom = csbiInfo.dwMaximumWindowSize.Y - 1;
157         if( !SetConsoleWindowInfo( hstdout, TRUE, &rect ) )
158             msg_Dbg( p_vout, "SetConsoleWindowInfo failed: %ix%i",
159                      rect.Right, rect.Bottom );
160     }
161 #endif
162
163     /* Allocate structure */
164     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
165     if( p_vout->p_sys == NULL )
166     {
167         FreeConsole();
168         return VLC_ENOMEM;
169     }
170
171     p_vout->p_sys->p_cv = cucul_create_canvas(0, 0);
172     if( !p_vout->p_sys->p_cv )
173     {
174         msg_Err( p_vout, "cannot initialize libcucul" );
175         FreeConsole();
176         free( p_vout->p_sys );
177         return VLC_EGENERIC;
178     }
179
180     p_vout->p_sys->p_dp = caca_create_display( p_vout->p_sys->p_cv );
181     if( !p_vout->p_sys->p_dp )
182     {
183         msg_Err( p_vout, "cannot initialize libcaca" );
184         cucul_free_canvas( p_vout->p_sys->p_cv );
185         free( p_vout->p_sys );
186         return VLC_EGENERIC;
187     }
188
189     caca_set_display_title( p_vout->p_sys->p_dp,
190                             VOUT_TITLE " - Colour AsCii Art (caca)" );
191
192     p_vout->pf_init = Init;
193     p_vout->pf_end = End;
194     p_vout->pf_manage = Manage;
195     p_vout->pf_render = Render;
196     p_vout->pf_display = Display;
197
198     return VLC_SUCCESS;
199 }
200
201 /*****************************************************************************
202  * Init: initialize libcaca video output thread
203  *****************************************************************************/
204 static int Init( vout_thread_t *p_vout )
205 {
206     int i_index;
207     picture_t *p_pic = NULL;
208
209     I_OUTPUTPICTURES = 0;
210
211     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
212     p_vout->output.i_width = p_vout->render.i_width;
213     p_vout->output.i_height = p_vout->render.i_height;
214     p_vout->output.i_aspect = p_vout->render.i_aspect;
215
216     p_vout->output.i_rmask = 0x00ff0000;
217     p_vout->output.i_gmask = 0x0000ff00;
218     p_vout->output.i_bmask = 0x000000ff;
219
220     /* Create the libcaca dither object */
221     p_vout->p_sys->p_dither = cucul_create_dither
222                        ( 32, p_vout->output.i_width, p_vout->output.i_height,
223                          4 * ((p_vout->output.i_width + 15) & ~15),
224                          p_vout->output.i_rmask, p_vout->output.i_gmask,
225                          p_vout->output.i_bmask, 0x00000000 );
226
227     if( !p_vout->p_sys->p_dither )
228     {
229         msg_Err( p_vout, "could not create libcaca dither object" );
230         return VLC_EGENERIC;
231     }
232
233     /* Find an empty picture slot */
234     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
235     {
236         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
237         {
238             p_pic = p_vout->p_picture + i_index;
239             break;
240         }
241     }
242
243     if( p_pic == NULL )
244     {
245         return VLC_EGENERIC;
246     }
247
248     /* Allocate the picture */
249     p_pic->p->i_lines = p_vout->output.i_height;
250     p_pic->p->i_visible_lines = p_vout->output.i_height;
251     p_pic->p->i_pitch = 4 * ((p_vout->output.i_width + 15) & ~15);
252     p_pic->p->i_pixel_pitch = 4;
253     p_pic->p->i_visible_pitch = 4 * p_vout->output.i_width;
254     p_pic->i_planes = 1;
255     p_pic->p->p_pixels = malloc( p_pic->p->i_pitch * p_pic->p->i_lines );
256
257     p_pic->i_status = DESTROYED_PICTURE;
258     p_pic->i_type   = DIRECT_PICTURE;
259
260     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
261     I_OUTPUTPICTURES++;
262
263     return VLC_SUCCESS;
264 }
265
266 /*****************************************************************************
267  * End: terminate libcaca video output thread
268  *****************************************************************************/
269 static void End( vout_thread_t *p_vout )
270 {
271     cucul_free_dither( p_vout->p_sys->p_dither );
272 }
273
274 /*****************************************************************************
275  * Destroy: destroy libcaca video output thread
276  *****************************************************************************
277  * Terminate an output method created by AaCreateOutputMethod
278  *****************************************************************************/
279 static void Destroy( vlc_object_t *p_this )
280 {
281     vout_thread_t *p_vout = (vout_thread_t *)p_this;
282
283     caca_free_display( p_vout->p_sys->p_dp );
284     cucul_free_canvas( p_vout->p_sys->p_cv );
285
286 #if defined( WIN32 ) && !defined( UNDER_CE )
287     FreeConsole();
288 #endif
289
290     free( p_vout->p_sys );
291 }
292
293 /*****************************************************************************
294  * Manage: handle libcaca events
295  *****************************************************************************
296  * This function should be called regularly by video output thread. It manages
297  * console events. It returns a non null value on error.
298  *****************************************************************************/
299 static int Manage( vout_thread_t *p_vout )
300 {
301 #ifdef CACA_API_VERSION_1
302     struct caca_event ev;
303 #else
304     int ev;
305 #endif
306
307     while( caca_get_event(p_vout->p_sys->p_dp, CACA_EVENT_ANY, &ev, 0) )
308     {
309         playlist_t *p_playlist;
310         vlc_value_t val;
311
312 #ifdef CACA_API_VERSION_1
313 #ifdef CACA_EVENT_OPAQUE
314         switch( caca_get_event_type( &ev ) )
315 #else
316         switch( ev.type )
317 #endif /* CACA_EVENT_OPAQUE */
318 #else
319         switch( ev )
320 #endif
321         {
322         case CACA_EVENT_KEY_RELEASE:
323 #ifdef CACA_API_VERSION_1
324 #ifdef CACA_EVENT_OPAQUE
325             switch( caca_get_event_key_ch( &ev ) )
326 #else
327             switch( ev.data.key.ch )
328 #endif /* CACA_EVENT_OPAQUE */
329 #else
330             switch( ev & 0x00ffffff )
331 #endif
332             {
333             case 'q':
334                 val.i_int = KEY_MODIFIER_CTRL | 'q';
335                 break;
336             case ' ':
337                 val.i_int = KEY_SPACE;
338                 break;
339             default:
340                 continue;
341             }
342
343             var_Set( p_vout->p_libvlc, "key-pressed", val );
344             break;
345         case CACA_EVENT_RESIZE:
346             /* Acknowledge the resize */
347             caca_refresh_display( p_vout->p_sys->p_dp );
348             break;
349 #ifdef CACA_API_VERSION_1
350         case  CACA_EVENT_MOUSE_MOTION:
351             val.i_int =
352 #ifdef CACA_EVENT_OPAQUE
353                 caca_get_event_mouse_x( &ev )
354 #else
355                 ev.data.mouse.x
356 #endif /* CACA_EVENT_OPAQUE */
357                 * p_vout->render.i_width
358                          / cucul_get_canvas_width( p_vout->p_sys->p_cv );
359             var_Set( p_vout, "mouse-x", val );
360             val.i_int =
361 #ifdef CACA_EVENT_OPAQUE
362                 caca_get_event_mouse_y( &ev ) 
363 #else
364                 ev.data.mouse.y
365 #endif /* CACA_EVENT_OPAQUE */
366                 * p_vout->render.i_height
367                          / cucul_get_canvas_height( p_vout->p_sys->p_cv );
368             var_Set( p_vout, "mouse-y", val );
369             var_SetBool( p_vout, "mouse-moved", true );
370             break;
371         case CACA_EVENT_MOUSE_RELEASE:
372             var_SetBool( p_vout, "mouse-clicked", true );
373             break;
374         case CACA_EVENT_QUIT:
375         {
376             p_playlist = pl_Hold( p_vout );
377             if( p_playlist )
378             {
379                 playlist_Stop( p_playlist );
380                 pl_Release( p_vout );
381             }
382             libvlc_Quit( p_vout->p_libvlc );
383             break;
384         }
385 #endif
386         default:
387             break;
388         }
389     }
390
391     return VLC_SUCCESS;
392 }
393
394 /*****************************************************************************
395  * Render: render previously calculated output
396  *****************************************************************************/
397 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
398 {
399     cucul_set_color_ansi( p_vout->p_sys->p_cv,
400                      CUCUL_COLOR_DEFAULT, CUCUL_COLOR_BLACK );
401     cucul_clear_canvas( p_vout->p_sys->p_cv );
402     cucul_dither_bitmap( p_vout->p_sys->p_cv, 0, 0,
403                          cucul_get_canvas_width( p_vout->p_sys->p_cv ) - 1,
404                          cucul_get_canvas_height( p_vout->p_sys->p_cv ) - 1,
405                          p_vout->p_sys->p_dither, p_pic->p->p_pixels );
406 }
407
408 /*****************************************************************************
409  * Display: displays previously rendered output
410  *****************************************************************************/
411 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
412 {
413     VLC_UNUSED(p_pic);
414     caca_refresh_display( p_vout->p_sys->p_dp );
415 }
416