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 1.13 2001/12/30 07:09:55 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 5
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_Display ( struct vout_thread_s *, struct picture_s * );
63 static int DummyNewPicture( struct vout_thread_s *, struct picture_s * );
65 /*****************************************************************************
66 * Functions exported as capabilities. They are declared as static so that
67 * we don't pollute the namespace too much.
68 *****************************************************************************/
69 void _M( vout_getfunctions )( function_list_t * p_function_list )
71 p_function_list->pf_probe = vout_Probe;
72 p_function_list->functions.vout.pf_create = vout_Create;
73 p_function_list->functions.vout.pf_init = vout_Init;
74 p_function_list->functions.vout.pf_end = vout_End;
75 p_function_list->functions.vout.pf_destroy = vout_Destroy;
76 p_function_list->functions.vout.pf_manage = vout_Manage;
77 p_function_list->functions.vout.pf_display = vout_Display;
78 p_function_list->functions.vout.pf_setpalette = NULL;
81 /*****************************************************************************
82 * intf_Probe: return a score
83 *****************************************************************************/
84 static int vout_Probe( probedata_t *p_data )
89 /*****************************************************************************
90 * vout_Create: allocates dummy video thread output method
91 *****************************************************************************
92 * This function allocates and initializes a dummy vout method.
93 *****************************************************************************/
94 static int vout_Create( vout_thread_t *p_vout )
96 /* Allocate structure */
97 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
98 if( p_vout->p_sys == NULL )
100 intf_ErrMsg("error: %s", strerror(ENOMEM) );
107 /*****************************************************************************
108 * vout_Init: initialize dummy video thread output method
109 *****************************************************************************/
110 static int vout_Init( vout_thread_t *p_vout )
115 I_OUTPUTPICTURES = 0;
117 /* Initialize the output structure */
118 switch( p_vout->render.i_chroma )
120 case YUV_420_PICTURE:
121 p_vout->output.i_chroma = p_vout->render.i_chroma;
122 p_vout->output.i_width = p_vout->render.i_width;
123 p_vout->output.i_height = p_vout->render.i_height;
124 p_vout->output.i_aspect = p_vout->render.i_aspect;
128 p_vout->output.i_chroma = RGB_16BPP_PICTURE;
129 p_vout->output.i_width = p_vout->render.i_width;
130 p_vout->output.i_height = p_vout->render.i_height;
131 p_vout->output.i_aspect = p_vout->render.i_aspect;
135 /* Try to initialize DUMMY_MAX_DIRECTBUFFERS direct buffers */
136 while( I_OUTPUTPICTURES < DUMMY_MAX_DIRECTBUFFERS )
140 /* Find an empty picture slot */
141 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
143 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
145 p_pic = p_vout->p_picture + i_index;
150 /* Allocate the picture */
151 if( p_pic == NULL || DummyNewPicture( p_vout, p_pic ) )
156 p_pic->i_status = DESTROYED_PICTURE;
157 p_pic->i_type = DIRECT_PICTURE;
159 p_pic->i_left_margin =
160 p_pic->i_right_margin =
161 p_pic->i_top_margin =
162 p_pic->i_bottom_margin = 0;
164 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
172 /*****************************************************************************
173 * vout_End: terminate dummy video thread output method
174 *****************************************************************************/
175 static void vout_End( vout_thread_t *p_vout )
179 /* Free the fake output buffers we allocated */
180 for( i_index = I_OUTPUTPICTURES ; i_index ; )
183 free( PP_OUTPUTPICTURE[ i_index ]->planes[ 0 ].p_data );
187 /*****************************************************************************
188 * vout_Destroy: destroy dummy video thread output method
189 *****************************************************************************
190 * Terminate an output method created by DummyCreateOutputMethod
191 *****************************************************************************/
192 static void vout_Destroy( vout_thread_t *p_vout )
194 free( p_vout->p_sys );
197 /*****************************************************************************
198 * vout_Manage: handle dummy events
199 *****************************************************************************
200 * This function should be called regularly by video output thread. It manages
201 * console events. It returns a non null value on error.
202 *****************************************************************************/
203 static int vout_Manage( vout_thread_t *p_vout )
208 /*****************************************************************************
209 * vout_Display: displays previously rendered output
210 *****************************************************************************
211 * This function send the currently rendered image to dummy image, waits until
212 * it is displayed and switch the two rendering buffers, preparing next frame.
213 *****************************************************************************/
214 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
216 /* No need to do anything, the fake direct buffers stay as they are */
220 /*****************************************************************************
221 * DummyNewPicture: allocate a picture
222 *****************************************************************************
223 * Returns 0 on success, -1 otherwise
224 *****************************************************************************/
225 static int DummyNewPicture( vout_thread_t *p_vout, picture_t *p_pic )
227 int i_luma_bytes, i_chroma_bytes;
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 */
236 case YUV_420_PICTURE:
238 /* Allocate the memory buffer */
239 i_luma_bytes = i_width * i_height * sizeof(pixel_data_t);
240 i_chroma_bytes = i_width * ( i_height / 2 ) * sizeof(pixel_data_t);
243 p_pic->planes[ Y_PLANE ].p_data = malloc( i_luma_bytes + 2 * i_chroma_bytes );
244 p_pic->planes[ Y_PLANE ].i_bytes = i_luma_bytes;
245 p_pic->planes[ Y_PLANE ].i_line_bytes = i_width * sizeof(pixel_data_t);
248 p_pic->planes[ U_PLANE ].p_data = p_pic->planes[ Y_PLANE ].p_data + i_height * i_width;
249 p_pic->planes[ U_PLANE ].i_bytes = i_chroma_bytes / 2;
250 p_pic->planes[ U_PLANE ].i_line_bytes = i_width / 2 * sizeof(pixel_data_t);
253 p_pic->planes[ V_PLANE ].p_data = p_pic->planes[ U_PLANE ].p_data + i_height * i_width / 2;
254 p_pic->planes[ V_PLANE ].i_bytes = i_chroma_bytes / 2;
255 p_pic->planes[ V_PLANE ].i_line_bytes = i_width / 2 * sizeof(pixel_data_t);
257 /* We allocated 3 planes */
263 /* Unknown chroma, allocate an RGB buffer, the video output's job
264 * will be to do the chroma->RGB conversion */
265 /* XXX FIXME this is BROKEN ! See how the other plugins do it */
268 /* Precalculate some values */
269 i_luma_bytes = sizeof(u16) * i_width * i_height;
271 /* Allocate the memory buffer */
272 p_pic->planes[ RGB_PLANE ].p_data = malloc( i_luma_bytes );
273 p_pic->planes[ RGB_PLANE ].i_bytes = i_luma_bytes;
275 /* We allocated 1 plane */