1 /*****************************************************************************
2 * vout_dummy.c: Dummy video output display method for testing purposes
3 *****************************************************************************
4 * Copyright (C) 2000, 2001 VideoLAN
5 * $Id: vout_dummy.c,v 1.17 2002/01/12 01:25:57 sam Exp $
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 <errno.h> /* ENOMEM */
28 #include <stdlib.h> /* free() */
29 #include <string.h> /* strerror() */
31 #include <videolan/vlc.h>
34 #include "video_output.h"
36 #define DUMMY_WIDTH 16
37 #define DUMMY_HEIGHT 16
38 #define DUMMY_MAX_DIRECTBUFFERS 10
40 /*****************************************************************************
41 * vout_sys_t: dummy video output method descriptor
42 *****************************************************************************
43 * This structure is part of the video output thread descriptor.
44 * It describes the dummy specific properties of an output thread.
45 *****************************************************************************/
46 typedef struct vout_sys_s
48 /* Nothing needed here. Maybe stats ? */
52 /*****************************************************************************
54 *****************************************************************************/
55 static int vout_Probe ( probedata_t *p_data );
56 static int vout_Create ( struct vout_thread_s * );
57 static int vout_Init ( struct vout_thread_s * );
58 static void vout_End ( struct vout_thread_s * );
59 static void vout_Destroy ( struct vout_thread_s * );
60 static int vout_Manage ( struct vout_thread_s * );
61 static void vout_Render ( struct vout_thread_s *, struct picture_s * );
62 static void vout_Display ( struct vout_thread_s *, struct picture_s * );
64 static int DummyNewPicture( struct vout_thread_s *, struct picture_s * );
66 /*****************************************************************************
67 * Functions exported as capabilities. They are declared as static so that
68 * we don't pollute the namespace too much.
69 *****************************************************************************/
70 void _M( vout_getfunctions )( function_list_t * p_function_list )
72 p_function_list->pf_probe = vout_Probe;
73 p_function_list->functions.vout.pf_create = vout_Create;
74 p_function_list->functions.vout.pf_init = vout_Init;
75 p_function_list->functions.vout.pf_end = vout_End;
76 p_function_list->functions.vout.pf_destroy = vout_Destroy;
77 p_function_list->functions.vout.pf_manage = vout_Manage;
78 p_function_list->functions.vout.pf_render = vout_Render;
79 p_function_list->functions.vout.pf_display = vout_Display;
82 /*****************************************************************************
83 * intf_Probe: return a score
84 *****************************************************************************/
85 static int vout_Probe( probedata_t *p_data )
90 /*****************************************************************************
91 * vout_Create: allocates dummy video thread output method
92 *****************************************************************************
93 * This function allocates and initializes a dummy vout method.
94 *****************************************************************************/
95 static int vout_Create( vout_thread_t *p_vout )
97 /* Allocate structure */
98 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
99 if( p_vout->p_sys == NULL )
101 intf_ErrMsg("error: %s", strerror(ENOMEM) );
108 /*****************************************************************************
109 * vout_Init: initialize dummy video thread output method
110 *****************************************************************************/
111 static int vout_Init( vout_thread_t *p_vout )
116 I_OUTPUTPICTURES = 0;
118 /* Initialize the output structure */
119 switch( p_vout->render.i_chroma )
124 p_vout->output.i_chroma = p_vout->render.i_chroma;
125 p_vout->output.i_width = p_vout->render.i_width;
126 p_vout->output.i_height = p_vout->render.i_height;
127 p_vout->output.i_aspect = p_vout->render.i_aspect;
131 p_vout->output.i_chroma = FOURCC_RV16;
132 p_vout->output.i_width = p_vout->render.i_width;
133 p_vout->output.i_height = p_vout->render.i_height;
134 p_vout->output.i_aspect = p_vout->render.i_aspect;
138 /* Try to initialize DUMMY_MAX_DIRECTBUFFERS direct buffers */
139 while( I_OUTPUTPICTURES < DUMMY_MAX_DIRECTBUFFERS )
143 /* Find an empty picture slot */
144 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
146 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
148 p_pic = p_vout->p_picture + i_index;
153 /* Allocate the picture */
154 if( p_pic == NULL || DummyNewPicture( p_vout, p_pic ) )
159 p_pic->i_status = DESTROYED_PICTURE;
160 p_pic->i_type = DIRECT_PICTURE;
162 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
170 /*****************************************************************************
171 * vout_End: terminate dummy video thread output method
172 *****************************************************************************/
173 static void vout_End( vout_thread_t *p_vout )
177 /* Free the fake output buffers we allocated */
178 for( i_index = I_OUTPUTPICTURES ; i_index ; )
181 free( PP_OUTPUTPICTURE[ i_index ]->p_data );
185 /*****************************************************************************
186 * vout_Destroy: destroy dummy video thread output method
187 *****************************************************************************
188 * Terminate an output method created by DummyCreateOutputMethod
189 *****************************************************************************/
190 static void vout_Destroy( vout_thread_t *p_vout )
192 free( p_vout->p_sys );
195 /*****************************************************************************
196 * vout_Manage: handle dummy events
197 *****************************************************************************
198 * This function should be called regularly by video output thread. It manages
199 * console events. It returns a non null value on error.
200 *****************************************************************************/
201 static int vout_Manage( vout_thread_t *p_vout )
206 /*****************************************************************************
207 * vout_Render: render previously calculated output
208 *****************************************************************************/
209 static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
211 /* No need to do anything, the fake direct buffers stay as they are */
214 /*****************************************************************************
215 * vout_Display: displays previously rendered output
216 *****************************************************************************/
217 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
219 /* No need to do anything, the fake direct buffers stay as they are */
222 /*****************************************************************************
223 * DummyNewPicture: allocate a picture
224 *****************************************************************************
225 * Returns 0 on success, -1 otherwise
226 *****************************************************************************/
227 static int DummyNewPicture( vout_thread_t *p_vout, picture_t *p_pic )
229 int i_width = p_vout->output.i_width;
230 int i_height = p_vout->output.i_height;
232 switch( p_vout->output.i_chroma )
234 /* We know this chroma, allocate a buffer which will be used
235 * directly by the decoder */
240 /* Allocate the memory buffer */
241 p_pic->p_data = memalign( 16, i_width * i_height * 3 / 2 );
244 p_pic->Y_PIXELS = p_pic->p_data;
245 p_pic->p[Y_PLANE].i_lines = i_height;
246 p_pic->p[Y_PLANE].i_pitch = i_width;
247 p_pic->p[Y_PLANE].i_pixel_bytes = 1;
248 p_pic->p[Y_PLANE].b_margin = 0;
251 p_pic->U_PIXELS = p_pic->Y_PIXELS + i_height * i_width;
252 p_pic->p[U_PLANE].i_lines = i_height / 2;
253 p_pic->p[U_PLANE].i_pitch = i_width / 2;
254 p_pic->p[U_PLANE].i_pixel_bytes = 1;
255 p_pic->p[U_PLANE].b_margin = 0;
258 p_pic->V_PIXELS = p_pic->U_PIXELS + i_height * i_width / 4;
259 p_pic->p[V_PLANE].i_lines = i_height / 2;
260 p_pic->p[V_PLANE].i_pitch = i_width / 2;
261 p_pic->p[V_PLANE].i_pixel_bytes = 1;
262 p_pic->p[V_PLANE].b_margin = 0;
264 /* We allocated 3 planes */
270 /* Unknown chroma, allocate an RGB buffer, the video output's job
271 * will be to do the chroma->RGB conversion */
274 /* Allocate the memory buffer */
275 p_pic->p_data = memalign( 16, i_width * i_height * 2 );
277 /* Fill important structures */
278 p_pic->p->p_pixels = p_pic->p_data;
279 p_pic->p->i_lines = i_height;
280 p_pic->p->i_pitch = i_width;
281 p_pic->p->i_pixel_bytes = 2;
282 p_pic->p->b_margin = 0;
283 p_pic->p->i_red_mask = 0xf800;
284 p_pic->p->i_green_mask = 0x07e0;
285 p_pic->p->i_blue_mask = 0x001f;
287 /* We allocated 1 plane */