src/video/x11/SDL_x11yuv.c
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FUNCTIONS
This source file includes following functions.
- X11_CreateYUVOverlay
- X11_LockYUVOverlay
- X11_UnlockYUVOverlay
- X11_DisplayYUVOverlay
- X11_FreeYUVOverlay
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id: SDL_x11yuv.c,v 1.1.2.10 2001/02/28 12:06:12 hercules Exp $";
26 #endif
27
28 /* This is the XFree86 Xv extension implementation of YUV video overlays */
29
30 #ifdef XFREE86_XV
31
32 #include <stdlib.h>
33 #include <string.h>
34 #include <X11/Xlib.h>
35 #include <sys/ipc.h>
36 #include <sys/shm.h>
37 #include <X11/extensions/XShm.h>
38 #include <X11/extensions/Xvlib.h>
39
40 #include "SDL_error.h"
41 #include "SDL_video.h"
42 #include "SDL_x11yuv_c.h"
43 #include "SDL_yuvfuncs.h"
44
45 #define XFREE86_REFRESH_HACK
46 #ifdef XFREE86_REFRESH_HACK
47 #include "SDL_x11image_c.h"
48 #endif
49
50 /* Workaround when pitch != width */
51 #define PITCH_WORKAROUND
52
53 /* The functions used to manipulate software video overlays */
54 static struct private_yuvhwfuncs x11_yuvfuncs = {
55 X11_LockYUVOverlay,
56 X11_UnlockYUVOverlay,
57 X11_DisplayYUVOverlay,
58 X11_FreeYUVOverlay
59 };
60
61 struct private_yuvhwdata {
62 int port;
63 XShmSegmentInfo yuvshm;
64 XvImage *image;
65 };
66
67
68 SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
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69 {
70 SDL_Overlay *overlay;
71 struct private_yuvhwdata *hwdata;
72 int xv_port;
73 int i, j, k;
74 int adaptors;
75 XvAdaptorInfo *ainfo;
76 XShmSegmentInfo *yuvshm;
77
78 /* Look for the XVideo extension with a valid port for this format */
79 xv_port = -1;
80 if ( (Success == XvQueryExtension(GFX_Display, &j, &j, &j, &j, &j)) &&
81 (Success == XvQueryAdaptors(GFX_Display,
82 RootWindow(GFX_Display, SDL_Screen),
83 &adaptors, &ainfo)) ) {
84 for ( i=0; (i < adaptors) && (xv_port == -1); ++i ) {
85 /* Check to see if the visual can be used */
86 if ( BUGGY_XFREE86(<=, 4001) ) {
87 int visual_ok = 0;
88 for ( j=0; j<ainfo[i].num_formats; ++j ) {
89 if ( ainfo[i].formats[j].visual_id ==
90 SDL_Visual->visualid ) {
91 visual_ok = 1;
92 break;
93 }
94 }
95 if ( ! visual_ok ) {
96 continue;
97 }
98 }
99 if ( (ainfo[i].type & XvInputMask) &&
100 (ainfo[i].type & XvImageMask) ) {
101 int num_formats;
102 XvImageFormatValues *formats;
103 formats = XvListImageFormats(GFX_Display,
104 ainfo[i].base_id, &num_formats);
105 for ( j=0; (j < num_formats) && (xv_port == -1); ++j ) {
106 if ( (Uint32)formats[j].id == format ) {
107 for ( k=0; k < ainfo[i].num_ports; ++k ) {
108 if ( Success == XvGrabPort(GFX_Display, ainfo[i].base_id+k, CurrentTime) ) {
109 xv_port = ainfo[i].base_id+k;
110 break;
111 }
112 }
113 }
114 }
115 }
116 }
117 }
118 if ( xv_port == -1 ) {
119 SDL_SetError("No available video ports for requested format");
120 return(NULL);
121 }
122
123 /* Create the overlay structure */
124 overlay = (SDL_Overlay *)malloc(sizeof *overlay);
125 if ( overlay == NULL ) {
126 XvUngrabPort(GFX_Display, xv_port, CurrentTime);
127 SDL_OutOfMemory();
128 return(NULL);
129 }
130 memset(overlay, 0, (sizeof *overlay));
131
132 /* Fill in the basic members */
133 overlay->format = format;
134 overlay->w = width;
135 overlay->h = height;
136
137 /* Set up the YUV surface function structure */
138 overlay->hwfuncs = &x11_yuvfuncs;
139 overlay->hw_overlay = 1;
140
141 /* Create the pixel data and lookup tables */
142 hwdata = (struct private_yuvhwdata *)malloc(sizeof *hwdata);
143 overlay->hwdata = hwdata;
144 if ( hwdata == NULL ) {
145 XvUngrabPort(GFX_Display, xv_port, CurrentTime);
146 SDL_OutOfMemory();
147 SDL_FreeYUVOverlay(overlay);
148 return(NULL);
149 }
150 yuvshm = &hwdata->yuvshm;
151 memset(yuvshm, 0, sizeof(*yuvshm));
152 hwdata->port = xv_port;
153 hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
154 0, width, height, yuvshm);
155
156 #ifdef PITCH_WORKAROUND
157 if ( hwdata->image != NULL && hwdata->image->pitches[0] != width )
158 {
159 /* Ajust overlay width according to pitch */
160 switch (format) {
161 case SDL_YV12_OVERLAY:
162 case SDL_IYUV_OVERLAY:
163 width = hwdata->image->pitches[0];
164 break;
165 case SDL_YUY2_OVERLAY:
166 case SDL_UYVY_OVERLAY:
167 case SDL_YVYU_OVERLAY:
168 width = hwdata->image->pitches[0] / 2;
169 break;
170 default:
171 /* We should never get here (caught above) */
172 return(NULL);
173 }
174
175 XFree(hwdata->image);
176 hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
177 0, width, height, yuvshm);
178 }
179 #endif
180
181 if ( hwdata->image == NULL ) {
182 SDL_OutOfMemory();
183 SDL_FreeYUVOverlay(overlay);
184 return(NULL);
185 }
186 yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
187 IPC_CREAT | 0777);
188 if ( yuvshm->shmid < 0 ) {
189 SDL_SetError("Unable to get %d bytes shared memory",
190 hwdata->image->data_size);
191 SDL_FreeYUVOverlay(overlay);
192 return(NULL);
193 }
194 yuvshm->shmaddr = (char *) shmat(yuvshm->shmid, 0, 0);
195 yuvshm->readOnly = False;
196 hwdata->image->data = yuvshm->shmaddr;
197
198 XShmAttach(GFX_Display, yuvshm);
199 XSync(GFX_Display, False);
200 shmctl(yuvshm->shmid, IPC_RMID, 0);
201
202 /* Find the pitch and offset values for the overlay */
203 overlay->planes = hwdata->image->num_planes;
204 overlay->pitches = (Uint16 *)malloc(overlay->planes * sizeof(Uint16));
205 overlay->pixels = (Uint8 **)malloc(overlay->planes * sizeof(Uint8 *));
206 if ( !overlay->pitches || !overlay->pixels ) {
207 SDL_OutOfMemory();
208 SDL_FreeYUVOverlay(overlay);
209 return(NULL);
210 }
211 for ( i=0; i<overlay->planes; ++i ) {
212 overlay->pitches[i] = hwdata->image->pitches[i];
213 overlay->pixels[i] = (Uint8 *)hwdata->image->data +
214 hwdata->image->offsets[i];
215 }
216
217 #ifdef XFREE86_REFRESH_HACK
218 /* Work around an XFree86 X server bug (?)
219 We can't perform normal updates in windows that have video
220 being output to them. See SDL_x11image.c for more details.
221 */
222 X11_DisableAutoRefresh(this);
223 #endif
224
225 /* We're all done.. */
226 return(overlay);
227 }
228
229 int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
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230 {
231 return(0);
232 }
233
234 void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
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235 {
236 return;
237 }
238
239 int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
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240 {
241 struct private_yuvhwdata *hwdata;
242
243 hwdata = overlay->hwdata;
244 XvShmPutImage(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
245 hwdata->image, 0, 0, overlay->w, overlay->h,
246 dstrect->x, dstrect->y, dstrect->w, dstrect->h, False);
247 XSync(GFX_Display, False);
248 return(0);
249 }
250
251 void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
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252 {
253 struct private_yuvhwdata *hwdata;
254
255 hwdata = overlay->hwdata;
256 if ( hwdata ) {
257 XvUngrabPort(GFX_Display, hwdata->port, CurrentTime);
258 if ( hwdata->yuvshm.shmaddr ) {
259 XShmDetach(GFX_Display, &hwdata->yuvshm);
260 shmdt(hwdata->yuvshm.shmaddr);
261 }
262 if ( hwdata->image ) {
263 XFree(hwdata->image);
264 }
265 free(hwdata);
266 }
267 if ( overlay->pitches ) {
268 free(overlay->pitches);
269 overlay->pitches = NULL;
270 }
271 if ( overlay->pixels ) {
272 free(overlay->pixels);
273 overlay->pixels = NULL;
274 }
275 #ifdef XFREE86_REFRESH_HACK
276 X11_EnableAutoRefresh(this);
277 #endif
278 }
279
280 #endif /* XFREE86_XV */