git.oblomov.eu Git - linux-2.6/blob - Documentation/video4linux/cx2341x/fw-osd-api.txt

   1 OSD firmware API description
   2 ============================
   3
   4 Note: this API is part of the decoder firmware, so it's cx23415 only.
   5
   6 -------------------------------------------------------------------------------
   7
   8 Name    CX2341X_OSD_GET_FRAMEBUFFER
   9 Enum    65/0x41
  10 Description
  11         Return base and length of contiguous OSD memory.
  12 Result[0]
  13         OSD base address
  14 Result[1]
  15         OSD length
  16
  17 -------------------------------------------------------------------------------
  18
  19 Name    CX2341X_OSD_GET_PIXEL_FORMAT
  20 Enum    66/0x42
  21 Description
  22         Query OSD format
  23 Result[0]
  24         0=8bit index, 4=AlphaRGB 8:8:8:8
  25
  26 -------------------------------------------------------------------------------
  27
  28 Name    CX2341X_OSD_SET_PIXEL_FORMAT
  29 Enum    67/0x43
  30 Description
  31         Assign pixel format
  32 Param[0]
  33         0=8bit index, 4=AlphaRGB 8:8:8:8
  34
  35 -------------------------------------------------------------------------------
  36
  37 Name    CX2341X_OSD_GET_STATE
  38 Enum    68/0x44
  39 Description
  40         Query OSD state
  41 Result[0]
  42         Bit  0   0=off, 1=on
  43         Bits 1:2 alpha control
  44         Bits 3:5 pixel format
  45
  46 -------------------------------------------------------------------------------
  47
  48 Name    CX2341X_OSD_SET_STATE
  49 Enum    69/0x45
  50 Description
  51         OSD switch
  52 Param[0]
  53         0=off, 1=on
  54
  55 -------------------------------------------------------------------------------
  56
  57 Name    CX2341X_OSD_GET_OSD_COORDS
  58 Enum    70/0x46
  59 Description
  60         Retrieve coordinates of OSD area blended with video
  61 Result[0]
  62         OSD buffer address
  63 Result[1]
  64         Stride in pixels
  65 Result[2]
  66         Lines in OSD buffer
  67 Result[3]
  68         Horizontal offset in buffer
  69 Result[4]
  70         Vertical offset in buffer
  71
  72 -------------------------------------------------------------------------------
  73
  74 Name    CX2341X_OSD_SET_OSD_COORDS
  75 Enum    71/0x47
  76 Description
  77         Assign the coordinates of the OSD area to blend with video
  78 Param[0]
  79         buffer address
  80 Param[1]
  81         buffer stride in pixels
  82 Param[2]
  83         lines in buffer
  84 Param[3]
  85         horizontal offset
  86 Param[4]
  87         vertical offset
  88
  89 -------------------------------------------------------------------------------
  90
  91 Name    CX2341X_OSD_GET_SCREEN_COORDS
  92 Enum    72/0x48
  93 Description
  94         Retrieve OSD screen area coordinates
  95 Result[0]
  96         top left horizontal offset
  97 Result[1]
  98         top left vertical offset
  99 Result[2]
 100         bottom right horizontal offset
 101 Result[3]
 102         bottom right vertical offset
 103
 104 -------------------------------------------------------------------------------
 105
 106 Name    CX2341X_OSD_SET_SCREEN_COORDS
 107 Enum    73/0x49
 108 Description
 109         Assign the coordinates of the screen area to blend with video
 110 Param[0]
 111         top left horizontal offset
 112 Param[1]
 113         top left vertical offset
 114 Param[2]
 115         bottom left horizontal offset
 116 Param[3]
 117         bottom left vertical offset
 118
 119 -------------------------------------------------------------------------------
 120
 121 Name    CX2341X_OSD_GET_GLOBAL_ALPHA
 122 Enum    74/0x4A
 123 Description
 124         Retrieve OSD global alpha
 125 Result[0]
 126         global alpha: 0=off, 1=on
 127 Result[1]
 128         bits 0:7 global alpha
 129
 130 -------------------------------------------------------------------------------
 131
 132 Name    CX2341X_OSD_SET_GLOBAL_ALPHA
 133 Enum    75/0x4B
 134 Description
 135         Update global alpha
 136 Param[0]
 137         global alpha: 0=off, 1=on
 138 Param[1]
 139         global alpha (8 bits)
 140 Param[2]
 141         local alpha: 0=on, 1=off
 142
 143 -------------------------------------------------------------------------------
 144
 145 Name    CX2341X_OSD_SET_BLEND_COORDS
 146 Enum    78/0x4C
 147 Description
 148         Move start of blending area within display buffer
 149 Param[0]
 150         horizontal offset in buffer
 151 Param[1]
 152         vertical offset in buffer
 153
 154 -------------------------------------------------------------------------------
 155
 156 Name    CX2341X_OSD_GET_FLICKER_STATE
 157 Enum    79/0x4F
 158 Description
 159         Retrieve flicker reduction module state
 160 Result[0]
 161         flicker state: 0=off, 1=on
 162
 163 -------------------------------------------------------------------------------
 164
 165 Name    CX2341X_OSD_SET_FLICKER_STATE
 166 Enum    80/0x50
 167 Description
 168         Set flicker reduction module state
 169 Param[0]
 170         State: 0=off, 1=on
 171
 172 -------------------------------------------------------------------------------
 173
 174 Name    CX2341X_OSD_BLT_COPY
 175 Enum    82/0x52
 176 Description
 177         BLT copy
 178 Param[0]
 179 '0000'  zero
 180 '0001' ~destination AND ~source
 181 '0010' ~destination AND  source
 182 '0011' ~destination
 183 '0100'  destination AND ~source
 184 '0101'                  ~source
 185 '0110'  destination XOR  source
 186 '0111' ~destination OR  ~source
 187 '1000' ~destination AND ~source
 188 '1001'  destination XNOR source
 189 '1010'                   source
 190 '1011' ~destination OR   source
 191 '1100'  destination
 192 '1101'  destination OR  ~source
 193 '1110'  destination OR   source
 194 '1111'  one
 195
 196 Param[1]
 197         Resulting alpha blending
 198             '01' source_alpha
 199             '10' destination_alpha
 200             '11' source_alpha*destination_alpha+1
 201                  (zero if both source and destination alpha are zero)
 202 Param[2]
 203         '00' output_pixel = source_pixel
 204
 205         '01' if source_alpha=0:
 206                  output_pixel = destination_pixel
 207              if 256 > source_alpha > 1:
 208                  output_pixel = ((source_alpha + 1)*source_pixel +
 209                                  (255 - source_alpha)*destination_pixel)/256
 210
 211         '10' if destination_alpha=0:
 212                  output_pixel = source_pixel
 213               if 255 > destination_alpha > 0:
 214                  output_pixel = ((255 - destination_alpha)*source_pixel +
 215                                  (destination_alpha + 1)*destination_pixel)/256
 216
 217         '11' if source_alpha=0:
 218                  source_temp = 0
 219              if source_alpha=255:
 220                  source_temp = source_pixel*256
 221              if 255 > source_alpha > 0:
 222                  source_temp = source_pixel*(source_alpha + 1)
 223              if destination_alpha=0:
 224                  destination_temp = 0
 225              if destination_alpha=255:
 226                  destination_temp = destination_pixel*256
 227              if 255 > destination_alpha > 0:
 228                  destination_temp = destination_pixel*(destination_alpha + 1)
 229              output_pixel = (source_temp + destination_temp)/256
 230 Param[3]
 231         width
 232 Param[4]
 233         height
 234 Param[5]
 235         destination pixel mask
 236 Param[6]
 237         destination rectangle start address
 238 Param[7]
 239         destination stride in dwords
 240 Param[8]
 241         source stride in dwords
 242 Param[9]
 243         source rectangle start address
 244
 245 -------------------------------------------------------------------------------
 246
 247 Name    CX2341X_OSD_BLT_FILL
 248 Enum    83/0x53
 249 Description
 250         BLT fill color
 251 Param[0]
 252         Same as Param[0] on API 0x52
 253 Param[1]
 254         Same as Param[1] on API 0x52
 255 Param[2]
 256         Same as Param[2] on API 0x52
 257 Param[3]
 258         width
 259 Param[4]
 260         height
 261 Param[5]
 262         destination pixel mask
 263 Param[6]
 264         destination rectangle start address
 265 Param[7]
 266         destination stride in dwords
 267 Param[8]
 268         color fill value
 269
 270 -------------------------------------------------------------------------------
 271
 272 Name    CX2341X_OSD_BLT_TEXT
 273 Enum    84/0x54
 274 Description
 275         BLT for 8 bit alpha text source
 276 Param[0]
 277         Same as Param[0] on API 0x52
 278 Param[1]
 279         Same as Param[1] on API 0x52
 280 Param[2]
 281         Same as Param[2] on API 0x52
 282 Param[3]
 283         width
 284 Param[4]
 285         height
 286 Param[5]
 287         destination pixel mask
 288 Param[6]
 289         destination rectangle start address
 290 Param[7]
 291         destination stride in dwords
 292 Param[8]
 293         source stride in dwords
 294 Param[9]
 295         source rectangle start address
 296 Param[10]
 297         color fill value
 298
 299 -------------------------------------------------------------------------------
 300
 301 Name    CX2341X_OSD_SET_FRAMEBUFFER_WINDOW
 302 Enum    86/0x56
 303 Description
 304         Positions the main output window on the screen. The coordinates must be
 305         such that the entire window fits on the screen.
 306 Param[0]
 307         window width
 308 Param[1]
 309         window height
 310 Param[2]
 311         top left window corner horizontal offset
 312 Param[3]
 313         top left window corner vertical offset
 314
 315 -------------------------------------------------------------------------------
 316
 317 Name    CX2341X_OSD_SET_CHROMA_KEY
 318 Enum    96/0x60
 319 Description
 320         Chroma key switch and color
 321 Param[0]
 322         state: 0=off, 1=on
 323 Param[1]
 324         color
 325
 326 -------------------------------------------------------------------------------
 327
 328 Name    CX2341X_OSD_GET_ALPHA_CONTENT_INDEX
 329 Enum    97/0x61
 330 Description
 331         Retrieve alpha content index
 332 Result[0]
 333         alpha content index, Range 0:15
 334
 335 -------------------------------------------------------------------------------
 336
 337 Name    CX2341X_OSD_SET_ALPHA_CONTENT_INDEX
 338 Enum    98/0x62
 339 Description
 340         Assign alpha content index
 341 Param[0]
 342         alpha content index, range 0:15