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