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annotate src/video/cybergfx/SDL_cgxyuv.c @ 1359:1e4ba2e063b4

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author Sam Lantinga <slouken@libsdl.org>
date Fri, 10 Feb 2006 07:03:22 +0000
parents c71e05b4dc2e
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* This is the XFree86 Xv extension implementation of YUV video overlays */
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24
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25 #ifdef XFREE86_XV
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26
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27 #include <X11/Xlib.h>
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28 #include <sys/ipc.h>
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29 #include <sys/shm.h>
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30 #include <X11/extensions/XShm.h>
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31 #include <X11/extensions/Xvlib.h>
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32
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33 #include "SDL_video.h"
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34 #include "SDL_x11yuv_c.h"
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35 #include "SDL_yuvfuncs.h"
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36
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37 /* The functions used to manipulate software video overlays */
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38 static struct private_yuvhwfuncs x11_yuvfuncs = {
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39 X11_LockYUVOverlay,
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40 X11_UnlockYUVOverlay,
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41 X11_DisplayYUVOverlay,
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42 X11_FreeYUVOverlay
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43 };
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44
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45 struct private_yuvhwdata {
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46 int port;
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47 XShmSegmentInfo yuvshm;
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48 XvImage *image;
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49 };
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50
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51
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52 SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
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53 {
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54 SDL_Overlay *overlay;
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55 struct private_yuvhwdata *hwdata;
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56 int xv_port;
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57 int i, j;
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58 int adaptors;
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59 XvAdaptorInfo *ainfo;
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60 XShmSegmentInfo *yuvshm;
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61
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62 xv_port = -1;
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63 if ( (Success == XvQueryExtension(GFX_Display, &j, &j, &j, &j, &j)) &&
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64 (Success == XvQueryAdaptors(GFX_Display,
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65 RootWindow(GFX_Display, SDL_Screen),
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66 &adaptors, &ainfo)) ) {
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67 for ( i=0; (i<adaptors) && (xv_port == -1); ++i ) {
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68 if ( (ainfo[i].type & XvInputMask) &&
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69 (ainfo[i].type & XvImageMask) ) {
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70 int num_formats;
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71 XvImageFormatValues *formats;
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72 formats = XvListImageFormats(GFX_Display,
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73 ainfo[i].base_id, &num_formats);
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74 for ( j=0; j<num_formats; ++j ) {
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75 if ( (Uint32)formats[j].id == format ) {
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76 xv_port = ainfo[i].base_id;
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77 break;
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78 }
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79 }
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80 }
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81 }
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82 }
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83 if ( xv_port == -1 ) {
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84 SDL_SetError("No available video ports for requested format");
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85 return(NULL);
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86 }
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87
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88 /* Create the overlay structure */
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89 overlay = (SDL_Overlay *)SDL_malloc(sizeof *overlay);
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90 if ( overlay == NULL ) {
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91 SDL_OutOfMemory();
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92 return(NULL);
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93 }
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94 SDL_memset(overlay, 0, (sizeof *overlay));
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95
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96 /* Fill in the basic members */
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97 overlay->format = format;
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98 overlay->w = width;
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99 overlay->h = height;
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100
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101 /* Set up the YUV surface function structure */
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102 overlay->hwfuncs = &x11_yuvfuncs;
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103
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104 /* Create the pixel data and lookup tables */
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105 hwdata = (struct private_yuvhwdata *)SDL_malloc(sizeof *hwdata);
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106 overlay->hwdata = hwdata;
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107 if ( hwdata == NULL ) {
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108 SDL_OutOfMemory();
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109 SDL_FreeYUVOverlay(overlay);
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110 return(NULL);
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111 }
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112 yuvshm = &hwdata->yuvshm;
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113 SDL_memset(yuvshm, 0, sizeof(*yuvshm));
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114 hwdata->port = xv_port;
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115 hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
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116 0, width, height, yuvshm);
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117 if ( hwdata->image == NULL ) {
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118 SDL_OutOfMemory();
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119 SDL_FreeYUVOverlay(overlay);
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120 return(NULL);
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121 }
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122 yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
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123 IPC_CREAT | 0777);
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124 if ( yuvshm->shmid < 0 ) {
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125 SDL_SetError("Unable to get %d bytes shared memory",
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126 hwdata->image->data_size);
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127 SDL_FreeYUVOverlay(overlay);
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128 return(NULL);
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129 }
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130 yuvshm->shmaddr = (caddr_t) shmat(yuvshm->shmid, 0, 0);
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131 yuvshm->readOnly = False;
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132 hwdata->image->data = yuvshm->shmaddr;
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133
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134 XShmAttach(GFX_Display, yuvshm);
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135 XSync(GFX_Display, False);
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136 shmctl(yuvshm->shmid, IPC_RMID, 0);
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137
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138 /* We're all done.. */
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139 return(overlay);
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140 }
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141
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142 int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
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143 {
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144 overlay->pixels = overlay->hwdata->image->data;
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145 /* What should the pitch be set to? */
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146 return(0);
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147 }
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148
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149 void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
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150 {
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151 overlay->pixels = NULL;
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152 }
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153
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154 int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
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155 {
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156 struct private_yuvhwdata *hwdata;
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157
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158 hwdata = overlay->hwdata;
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159 XvShmPutImage(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
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160 hwdata->image, 0, 0, overlay->w, overlay->h,
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161 dstrect->x, dstrect->y, dstrect->w, dstrect->h, False);
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162 XSync(GFX_Display, False);
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163 return(0);
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164 }
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165
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166 void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
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167 {
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168 struct private_yuvhwdata *hwdata;
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169
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170 hwdata = overlay->hwdata;
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171 if ( hwdata ) {
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172 if ( hwdata->yuvshm.shmaddr ) {
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173 XShmDetach(GFX_Display, &hwdata->yuvshm);
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174 shmdt(hwdata->yuvshm.shmaddr);
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175 }
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176 if ( hwdata->image ) {
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177 XFree(hwdata->image);
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178 }
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179 SDL_free(hwdata);
21
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180 }
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181 }
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182
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183 #endif /* XFREE86_XV */