src/misc/fourcc.c

   1 /*****************************************************************************
   2  * fourcc.c: fourcc helpers functions
   3  *****************************************************************************
   4  * Copyright © 2009-2011 Laurent Aimar
   5  *
   6  * Authors: Laurent Aimar <fenrir@videolan.org>
   7  *          Jean-Baptiste Kempf <jb@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_fourcc.h>
  33 #include <vlc_es.h>
  34 #include <assert.h>
  35
  36 #include "fourcc_tables.h"
  37
  38 static int fourcc_cmp(const void *key, const void *ent)
  39 {
  40     return memcmp(key, ent, 4);
  41 }
  42
  43 static vlc_fourcc_t Lookup(vlc_fourcc_t fourcc, const char **restrict dsc,
  44                            const struct fourcc_mapping *mapv, size_t mapc,
  45                            const struct fourcc_desc *dscv, size_t dscc)
  46 {
  47     const struct fourcc_mapping *mapping;
  48     const struct fourcc_desc *desc;
  49
  50     mapping = bsearch(&fourcc, mapv, mapc, sizeof (*mapv), fourcc_cmp);
  51     if (mapping != NULL)
  52     {
  53         if (dsc != NULL)
  54         {
  55             desc = bsearch(&fourcc, dscv, dscc, sizeof (*dscv), fourcc_cmp);
  56             if (desc != NULL)
  57             {
  58                 *dsc = desc->desc;
  59                 return mapping->fourcc;
  60             }
  61         }
  62         fourcc = mapping->fourcc;
  63     }
  64
  65     desc = bsearch(&fourcc, dscv, dscc, sizeof (*dscv), fourcc_cmp);
  66     if (desc == NULL)
  67         return 0; /* Unknown FourCC */
  68     if (dsc != NULL)
  69         *dsc = desc->desc;
  70     return fourcc; /* Known FourCC (has a description) */
  71 }
  72
  73 static vlc_fourcc_t LookupVideo(vlc_fourcc_t fourcc, const char **restrict dsc)
  74 {
  75     return Lookup(fourcc, dsc, mapping_video,
  76                   sizeof (mapping_video) / sizeof (mapping_video[0]),
  77                   desc_video, sizeof (desc_video) / sizeof (desc_video[0]));
  78 }
  79
  80 static vlc_fourcc_t LookupAudio(vlc_fourcc_t fourcc, const char **restrict dsc)
  81 {
  82     return Lookup(fourcc, dsc, mapping_audio,
  83                   sizeof (mapping_audio) / sizeof (mapping_audio[0]),
  84                   desc_audio, sizeof (desc_audio) / sizeof (desc_audio[0]));
  85 }
  86
  87 static vlc_fourcc_t LookupSpu(vlc_fourcc_t fourcc, const char **restrict dsc)
  88 {
  89     return Lookup(fourcc, dsc, mapping_spu,
  90                   sizeof (mapping_spu) / sizeof (mapping_spu[0]),
  91                   desc_spu, sizeof (desc_spu) / sizeof (desc_spu[0]));
  92 }
  93
  94 static vlc_fourcc_t LookupCat(vlc_fourcc_t fourcc, const char **restrict dsc,
  95                               int cat)
  96 {
  97     switch (cat)
  98     {
  99         case VIDEO_ES:
 100             return LookupVideo(fourcc, dsc);
 101         case AUDIO_ES:
 102             return LookupAudio(fourcc, dsc);
 103         case SPU_ES:
 104             return LookupSpu(fourcc, dsc);
 105     }
 106
 107     vlc_fourcc_t ret = LookupVideo(fourcc, dsc);
 108     if (!ret)
 109         ret = LookupAudio(fourcc, dsc);
 110     if (!ret)
 111         ret = LookupSpu(fourcc, dsc);
 112     return ret;
 113 }
 114
 115 vlc_fourcc_t vlc_fourcc_GetCodec(int cat, vlc_fourcc_t fourcc)
 116 {
 117     vlc_fourcc_t codec = LookupCat(fourcc, NULL, cat);
 118     return codec ? codec : fourcc;
 119 }
 120
 121 vlc_fourcc_t vlc_fourcc_GetCodecFromString( int i_cat, const char *psz_fourcc )
 122 {
 123     if( !psz_fourcc || strlen(psz_fourcc) != 4 )
 124         return 0;
 125     return vlc_fourcc_GetCodec( i_cat,
 126                                 VLC_FOURCC( psz_fourcc[0], psz_fourcc[1],
 127                                             psz_fourcc[2], psz_fourcc[3] ) );
 128 }
 129
 130 vlc_fourcc_t vlc_fourcc_GetCodecAudio( vlc_fourcc_t i_fourcc, int i_bits )
 131 {
 132     const int i_bytes = ( i_bits + 7 ) / 8;
 133
 134     if( i_fourcc == VLC_FOURCC( 'a', 'f', 'l', 't' ) )
 135     {
 136         switch( i_bytes )
 137         {
 138         case 4:
 139             return VLC_CODEC_FL32;
 140         case 8:
 141             return VLC_CODEC_FL64;
 142         default:
 143             return 0;
 144         }
 145     }
 146     else if( i_fourcc == VLC_FOURCC( 'a', 'r', 'a', 'w' ) )
 147     {
 148         switch( i_bytes )
 149         {
 150         case 1:
 151             return VLC_CODEC_U8;
 152         case 2:
 153             return VLC_CODEC_S16L;
 154         case 3:
 155             return VLC_CODEC_S24L;
 156         case 4:
 157             return VLC_CODEC_S32L;
 158         default:
 159             return 0;
 160         }
 161     }
 162     else if( i_fourcc == VLC_FOURCC( 't', 'w', 'o', 's' ) )
 163     {
 164         switch( i_bytes )
 165         {
 166         case 1:
 167             return VLC_CODEC_S8;
 168         case 2:
 169             return VLC_CODEC_S16B;
 170         case 3:
 171             return VLC_CODEC_S24B;
 172         case 4:
 173             return VLC_CODEC_S32B;
 174         default:
 175             return 0;
 176         }
 177     }
 178     else if( i_fourcc == VLC_FOURCC( 's', 'o', 'w', 't' ) )
 179     {
 180         switch( i_bytes )
 181         {
 182         case 1:
 183             return VLC_CODEC_S8;
 184         case 2:
 185             return VLC_CODEC_S16L;
 186         case 3:
 187             return VLC_CODEC_S24L;
 188         case 4:
 189             return VLC_CODEC_S32L;
 190         default:
 191             return 0;
 192         }
 193     }
 194     else
 195     {
 196         return vlc_fourcc_GetCodec( AUDIO_ES, i_fourcc );
 197     }
 198 }
 199
 200 const char *vlc_fourcc_GetDescription(int cat, vlc_fourcc_t fourcc)
 201 {
 202     const char *ret;
 203
 204     return LookupCat(fourcc, &ret, cat) ? ret : "";
 205 }
 206
 207
 208 /* */
 209 #define VLC_CODEC_YUV_PLANAR_410 \
 210     VLC_CODEC_I410, VLC_CODEC_YV9
 211
 212 #define VLC_CODEC_YUV_PLANAR_420 \
 213     VLC_CODEC_I420, VLC_CODEC_YV12, VLC_CODEC_J420
 214
 215 #define VLC_CODEC_YUV_SEMIPLANAR_420 \
 216     VLC_CODEC_NV12, VLC_CODEC_NV21
 217
 218 #define VLC_CODEC_YUV_PLANAR_420_16 \
 219     VLC_CODEC_I420_16L, VLC_CODEC_I420_16B, VLC_CODEC_I420_12L, VLC_CODEC_I420_12B, VLC_CODEC_I420_10L, VLC_CODEC_I420_10B, VLC_CODEC_I420_9L, VLC_CODEC_I420_9B
 220
 221 #define VLC_CODEC_YUV_PLANAR_422 \
 222     VLC_CODEC_I422, VLC_CODEC_J422
 223
 224 #define VLC_CODEC_YUV_SEMIPLANAR_422 \
 225     VLC_CODEC_NV16, VLC_CODEC_NV61
 226
 227 #define VLC_CODEC_YUV_PLANAR_422_16 \
 228     VLC_CODEC_I422_12L, VLC_CODEC_I422_12B, VLC_CODEC_I422_10L, VLC_CODEC_I422_10B, VLC_CODEC_I422_9L, VLC_CODEC_I422_9B
 229
 230 #define VLC_CODEC_YUV_PLANAR_440 \
 231     VLC_CODEC_I440, VLC_CODEC_J440
 232
 233 #define VLC_CODEC_YUV_PLANAR_444 \
 234     VLC_CODEC_I444, VLC_CODEC_J444
 235
 236 #define VLC_CODEC_YUV_SEMIPLANAR_444 \
 237     VLC_CODEC_NV24, VLC_CODEC_NV42
 238
 239 #define VLC_CODEC_YUV_PLANAR_444_16 \
 240     VLC_CODEC_I444_10L, VLC_CODEC_I444_10B, VLC_CODEC_I444_9L, VLC_CODEC_I444_9B, \
 241     VLC_CODEC_I444_16L, VLC_CODEC_I444_16B, VLC_CODEC_I444_12L, VLC_CODEC_I444_12B
 242
 243 #define VLC_CODEC_YUV_PACKED \
 244     VLC_CODEC_YUYV, VLC_CODEC_YVYU, \
 245     VLC_CODEC_UYVY, VLC_CODEC_VYUY
 246
 247 #define VLC_CODEC_FALLBACK_420 \
 248     VLC_CODEC_YUV_PLANAR_422, VLC_CODEC_YUV_PACKED, \
 249     VLC_CODEC_YUV_PLANAR_444, VLC_CODEC_YUV_PLANAR_440, \
 250     VLC_CODEC_I411, VLC_CODEC_YUV_PLANAR_410, VLC_CODEC_Y211
 251
 252 static const vlc_fourcc_t p_I420_fallback[] = {
 253     VLC_CODEC_I420, VLC_CODEC_YV12, VLC_CODEC_J420, VLC_CODEC_FALLBACK_420, 0
 254 };
 255 static const vlc_fourcc_t p_J420_fallback[] = {
 256     VLC_CODEC_J420, VLC_CODEC_I420, VLC_CODEC_YV12, VLC_CODEC_FALLBACK_420, 0
 257 };
 258 static const vlc_fourcc_t p_YV12_fallback[] = {
 259     VLC_CODEC_YV12, VLC_CODEC_I420, VLC_CODEC_J420, VLC_CODEC_FALLBACK_420, 0
 260 };
 261 static const vlc_fourcc_t p_NV12_fallback[] = {
 262     VLC_CODEC_NV12, VLC_CODEC_I420, VLC_CODEC_J420, VLC_CODEC_FALLBACK_420, 0
 263 };
 264
 265 #define VLC_CODEC_FALLBACK_420_16 \
 266     VLC_CODEC_I420, VLC_CODEC_YV12, VLC_CODEC_J420, VLC_CODEC_FALLBACK_420
 267
 268 static const vlc_fourcc_t p_I420_9L_fallback[] = {
 269     VLC_CODEC_I420_9L, VLC_CODEC_I420_9B, VLC_CODEC_FALLBACK_420_16, 0
 270 };
 271 static const vlc_fourcc_t p_I420_9B_fallback[] = {
 272     VLC_CODEC_I420_9B, VLC_CODEC_I420_9L, VLC_CODEC_FALLBACK_420_16, 0
 273 };
 274 static const vlc_fourcc_t p_I420_10L_fallback[] = {
 275     VLC_CODEC_I420_10L, VLC_CODEC_I420_10B, VLC_CODEC_FALLBACK_420_16, 0
 276 };
 277 static const vlc_fourcc_t p_I420_10B_fallback[] = {
 278     VLC_CODEC_I420_10B, VLC_CODEC_I420_10L, VLC_CODEC_FALLBACK_420_16, 0
 279 };
 280 static const vlc_fourcc_t p_I420_12L_fallback[] = {
 281     VLC_CODEC_I420_12L, VLC_CODEC_I420_12B, VLC_CODEC_FALLBACK_420_16, 0
 282 };
 283 static const vlc_fourcc_t p_I420_12B_fallback[] = {
 284     VLC_CODEC_I420_12B, VLC_CODEC_I420_12L, VLC_CODEC_FALLBACK_420_16, 0
 285 };
 286 static const vlc_fourcc_t p_I420_16L_fallback[] = {
 287     VLC_CODEC_I420_16L, VLC_CODEC_I420_16B, VLC_CODEC_FALLBACK_420_16, 0
 288 };
 289 static const vlc_fourcc_t p_I420_16B_fallback[] = {
 290     VLC_CODEC_I420_16B, VLC_CODEC_I420_16L, VLC_CODEC_FALLBACK_420_16, 0
 291 };
 292
 293
 294 #define VLC_CODEC_FALLBACK_422 \
 295     VLC_CODEC_YUV_PACKED, VLC_CODEC_YUV_PLANAR_420, \
 296     VLC_CODEC_YUV_PLANAR_444, VLC_CODEC_YUV_PLANAR_440, \
 297     VLC_CODEC_I411, VLC_CODEC_YUV_PLANAR_410, VLC_CODEC_Y211
 298
 299 static const vlc_fourcc_t p_I422_fallback[] = {
 300     VLC_CODEC_I422, VLC_CODEC_J422, VLC_CODEC_FALLBACK_422, 0
 301 };
 302 static const vlc_fourcc_t p_J422_fallback[] = {
 303     VLC_CODEC_J422, VLC_CODEC_I422, VLC_CODEC_FALLBACK_422, 0
 304 };
 305
 306 #define VLC_CODEC_FALLBACK_422_16 \
 307     VLC_CODEC_I422, VLC_CODEC_J422, VLC_CODEC_FALLBACK_422
 308
 309 static const vlc_fourcc_t p_I422_9L_fallback[] = {
 310     VLC_CODEC_I422_9L, VLC_CODEC_I422_9B, VLC_CODEC_FALLBACK_422_16, 0
 311 };
 312 static const vlc_fourcc_t p_I422_9B_fallback[] = {
 313     VLC_CODEC_I422_9B, VLC_CODEC_I422_9L, VLC_CODEC_FALLBACK_422_16, 0
 314 };
 315 static const vlc_fourcc_t p_I422_10L_fallback[] = {
 316     VLC_CODEC_I422_10L, VLC_CODEC_I422_10B, VLC_CODEC_FALLBACK_422_16, 0
 317 };
 318 static const vlc_fourcc_t p_I422_10B_fallback[] = {
 319     VLC_CODEC_I422_10B, VLC_CODEC_I422_10L, VLC_CODEC_FALLBACK_422_16, 0
 320 };
 321 static const vlc_fourcc_t p_I422_12L_fallback[] = {
 322     VLC_CODEC_I422_12L, VLC_CODEC_I422_12B, VLC_CODEC_FALLBACK_422_16, 0
 323 };
 324 static const vlc_fourcc_t p_I422_12B_fallback[] = {
 325     VLC_CODEC_I422_12B, VLC_CODEC_I422_12L, VLC_CODEC_FALLBACK_422_16, 0
 326 };
 327
 328 #define VLC_CODEC_FALLBACK_444 \
 329     VLC_CODEC_YUV_PLANAR_422, VLC_CODEC_YUV_PACKED, \
 330     VLC_CODEC_YUV_PLANAR_420, VLC_CODEC_YUV_PLANAR_440, \
 331     VLC_CODEC_I411, VLC_CODEC_YUV_PLANAR_410, VLC_CODEC_Y211
 332
 333 static const vlc_fourcc_t p_I444_fallback[] = {
 334     VLC_CODEC_I444, VLC_CODEC_J444, VLC_CODEC_FALLBACK_444, 0
 335 };
 336 static const vlc_fourcc_t p_J444_fallback[] = {
 337     VLC_CODEC_J444, VLC_CODEC_I444, VLC_CODEC_FALLBACK_444, 0
 338 };
 339
 340 #define VLC_CODEC_FALLBACK_444_16 \
 341     VLC_CODEC_I444, VLC_CODEC_J444, VLC_CODEC_FALLBACK_444
 342
 343 static const vlc_fourcc_t p_I444_9L_fallback[] = {
 344     VLC_CODEC_I444_9L, VLC_CODEC_I444_9B, VLC_CODEC_FALLBACK_444_16, 0
 345 };
 346 static const vlc_fourcc_t p_I444_9B_fallback[] = {
 347     VLC_CODEC_I444_9B, VLC_CODEC_I444_9L, VLC_CODEC_FALLBACK_444_16, 0
 348 };
 349 static const vlc_fourcc_t p_I444_10L_fallback[] = {
 350     VLC_CODEC_I444_10L, VLC_CODEC_I444_10B, VLC_CODEC_FALLBACK_444_16, 0
 351 };
 352 static const vlc_fourcc_t p_I444_10B_fallback[] = {
 353     VLC_CODEC_I444_10B, VLC_CODEC_I444_10L, VLC_CODEC_FALLBACK_444_16, 0
 354 };
 355 static const vlc_fourcc_t p_I444_12L_fallback[] = {
 356     VLC_CODEC_I444_12L, VLC_CODEC_I444_12B, VLC_CODEC_FALLBACK_444_16, 0
 357 };
 358 static const vlc_fourcc_t p_I444_12B_fallback[] = {
 359     VLC_CODEC_I444_12B, VLC_CODEC_I444_12L, VLC_CODEC_FALLBACK_444_16, 0
 360 };
 361 static const vlc_fourcc_t p_I444_16L_fallback[] = {
 362     VLC_CODEC_I444_16L, VLC_CODEC_I444_16B, VLC_CODEC_FALLBACK_444_16, 0
 363 };
 364 static const vlc_fourcc_t p_I444_16B_fallback[] = {
 365     VLC_CODEC_I444_16B, VLC_CODEC_I444_16L, VLC_CODEC_FALLBACK_444_16, 0
 366 };
 367
 368
 369 /* Fallbacks for cvpx */
 370 static const vlc_fourcc_t p_CVPX_VIDEO_NV12_fallback[] = {
 371     VLC_CODEC_CVPX_NV12, VLC_CODEC_I420, 0,
 372 };
 373 static const vlc_fourcc_t p_CVPX_VIDEO_UYVY_fallback[] = {
 374     VLC_CODEC_CVPX_UYVY, VLC_CODEC_I420, 0,
 375 };
 376 static const vlc_fourcc_t p_CVPX_VIDEO_I420_fallback[] = {
 377     VLC_CODEC_CVPX_I420, VLC_CODEC_I420, 0,
 378 };
 379
 380 static const vlc_fourcc_t p_VAAPI_420_fallback[] = {
 381     VLC_CODEC_VAAPI_420, VLC_CODEC_I420, 0,
 382 };
 383
 384 static const vlc_fourcc_t p_I440_fallback[] = {
 385     VLC_CODEC_I440,
 386     VLC_CODEC_YUV_PLANAR_420,
 387     VLC_CODEC_YUV_PLANAR_422,
 388     VLC_CODEC_YUV_PLANAR_444,
 389     VLC_CODEC_YUV_PACKED,
 390     VLC_CODEC_I411, VLC_CODEC_YUV_PLANAR_410, VLC_CODEC_Y211, 0
 391 };
 392
 393 #define VLC_CODEC_FALLBACK_PACKED \
 394     VLC_CODEC_YUV_PLANAR_422, VLC_CODEC_YUV_PLANAR_420, \
 395     VLC_CODEC_YUV_PLANAR_444, VLC_CODEC_YUV_PLANAR_440, \
 396     VLC_CODEC_I411, VLC_CODEC_YUV_PLANAR_410, VLC_CODEC_Y211
 397
 398 static const vlc_fourcc_t p_YUYV_fallback[] = {
 399     VLC_CODEC_YUYV,
 400     VLC_CODEC_YVYU,
 401     VLC_CODEC_UYVY,
 402     VLC_CODEC_VYUY,
 403     VLC_CODEC_FALLBACK_PACKED, 0
 404 };
 405 static const vlc_fourcc_t p_YVYU_fallback[] = {
 406     VLC_CODEC_YVYU,
 407     VLC_CODEC_YUYV,
 408     VLC_CODEC_UYVY,
 409     VLC_CODEC_VYUY,
 410     VLC_CODEC_FALLBACK_PACKED, 0
 411 };
 412 static const vlc_fourcc_t p_UYVY_fallback[] = {
 413     VLC_CODEC_UYVY,
 414     VLC_CODEC_VYUY,
 415     VLC_CODEC_YUYV,
 416     VLC_CODEC_YVYU,
 417     VLC_CODEC_FALLBACK_PACKED, 0
 418 };
 419 static const vlc_fourcc_t p_VYUY_fallback[] = {
 420     VLC_CODEC_VYUY,
 421     VLC_CODEC_UYVY,
 422     VLC_CODEC_YUYV,
 423     VLC_CODEC_YVYU,
 424     VLC_CODEC_FALLBACK_PACKED, 0
 425 };
 426
 427 static const vlc_fourcc_t *pp_YUV_fallback[] = {
 428     p_YV12_fallback,
 429     p_I420_fallback,
 430     p_I420_9L_fallback,
 431     p_I420_9B_fallback,
 432     p_I420_10L_fallback,
 433     p_I420_10B_fallback,
 434     p_I420_12L_fallback,
 435     p_I420_12B_fallback,
 436     p_I420_16L_fallback,
 437     p_I420_16B_fallback,
 438     p_J420_fallback,
 439     p_I422_fallback,
 440     p_I422_9L_fallback,
 441     p_I422_9B_fallback,
 442     p_I422_10L_fallback,
 443     p_I422_10B_fallback,
 444     p_I422_12L_fallback,
 445     p_I422_12B_fallback,
 446     p_J422_fallback,
 447     p_I444_fallback,
 448     p_J444_fallback,
 449     p_I444_9L_fallback,
 450     p_I444_9B_fallback,
 451     p_I444_10L_fallback,
 452     p_I444_10B_fallback,
 453     p_I444_12L_fallback,
 454     p_I444_12B_fallback,
 455     p_I444_16L_fallback,
 456     p_I444_16B_fallback,
 457     p_I440_fallback,
 458     p_YUYV_fallback,
 459     p_YVYU_fallback,
 460     p_UYVY_fallback,
 461     p_VYUY_fallback,
 462     p_NV12_fallback,
 463     p_CVPX_VIDEO_NV12_fallback,
 464     p_CVPX_VIDEO_UYVY_fallback,
 465     p_CVPX_VIDEO_I420_fallback,
 466     p_VAAPI_420_fallback,
 467     NULL,
 468 };
 469
 470 static const vlc_fourcc_t p_list_YUV[] = {
 471     VLC_CODEC_YUV_PLANAR_420,
 472     VLC_CODEC_YUV_SEMIPLANAR_420,
 473     VLC_CODEC_YUV_PLANAR_422,
 474     VLC_CODEC_YUV_SEMIPLANAR_422,
 475     VLC_CODEC_YUV_PLANAR_440,
 476     VLC_CODEC_YUV_PLANAR_444,
 477     VLC_CODEC_YUV_SEMIPLANAR_444,
 478     VLC_CODEC_YUV_PACKED,
 479     VLC_CODEC_I411, VLC_CODEC_YUV_PLANAR_410, VLC_CODEC_Y211,
 480     VLC_CODEC_YUV_PLANAR_420_16,
 481     VLC_CODEC_YUV_PLANAR_422_16,
 482     VLC_CODEC_YUV_PLANAR_444_16,
 483     VLC_CODEC_VDPAU_VIDEO_420,
 484     VLC_CODEC_VDPAU_VIDEO_422,
 485     VLC_CODEC_VDPAU_VIDEO_444,
 486     VLC_CODEC_CVPX_NV12,
 487     VLC_CODEC_CVPX_UYVY,
 488     VLC_CODEC_CVPX_I420,
 489     VLC_CODEC_VAAPI_420,
 490     0,
 491 };
 492
 493 /* */
 494 static const vlc_fourcc_t p_RGB32_fallback[] = {
 495     VLC_CODEC_RGB32,
 496     VLC_CODEC_RGB24,
 497     VLC_CODEC_RGB16,
 498     VLC_CODEC_RGB15,
 499     VLC_CODEC_RGB8,
 500     0,
 501 };
 502 static const vlc_fourcc_t p_RGB24_fallback[] = {
 503     VLC_CODEC_RGB24,
 504     VLC_CODEC_RGB32,
 505     VLC_CODEC_RGB16,
 506     VLC_CODEC_RGB15,
 507     VLC_CODEC_RGB8,
 508     0,
 509 };
 510 static const vlc_fourcc_t p_RGB16_fallback[] = {
 511     VLC_CODEC_RGB16,
 512     VLC_CODEC_RGB24,
 513     VLC_CODEC_RGB32,
 514     VLC_CODEC_RGB15,
 515     VLC_CODEC_RGB8,
 516     0,
 517 };
 518 static const vlc_fourcc_t p_RGB15_fallback[] = {
 519     VLC_CODEC_RGB15,
 520     VLC_CODEC_RGB16,
 521     VLC_CODEC_RGB24,
 522     VLC_CODEC_RGB32,
 523     VLC_CODEC_RGB8,
 524     0,
 525 };
 526 static const vlc_fourcc_t p_RGB8_fallback[] = {
 527     VLC_CODEC_RGB8,
 528     VLC_CODEC_RGB15,
 529     VLC_CODEC_RGB16,
 530     VLC_CODEC_RGB24,
 531     VLC_CODEC_RGB32,
 532     0,
 533 };
 534 static const vlc_fourcc_t *pp_RGB_fallback[] = {
 535     p_RGB32_fallback,
 536     p_RGB24_fallback,
 537     p_RGB16_fallback,
 538     p_RGB15_fallback,
 539     p_RGB8_fallback,
 540
 541     NULL,
 542 };
 543
 544
 545 /* */
 546 static const vlc_fourcc_t *GetFallback( vlc_fourcc_t i_fourcc,
 547                                         const vlc_fourcc_t *pp_fallback[],
 548                                         const vlc_fourcc_t p_list[] )
 549 {
 550     for( unsigned i = 0; pp_fallback[i]; i++ )
 551     {
 552         if( pp_fallback[i][0] == i_fourcc )
 553             return pp_fallback[i];
 554     }
 555     return p_list;
 556 }
 557
 558 const vlc_fourcc_t *vlc_fourcc_GetYUVFallback( vlc_fourcc_t i_fourcc )
 559 {
 560     return GetFallback( i_fourcc, pp_YUV_fallback, p_list_YUV );
 561 }
 562 const vlc_fourcc_t *vlc_fourcc_GetRGBFallback( vlc_fourcc_t i_fourcc )
 563 {
 564     return GetFallback( i_fourcc, pp_RGB_fallback, p_RGB32_fallback );
 565 }
 566
 567 bool vlc_fourcc_AreUVPlanesSwapped( vlc_fourcc_t a, vlc_fourcc_t b )
 568 {
 569     static const vlc_fourcc_t pp_swapped[][4] = {
 570         { VLC_CODEC_YV12, VLC_CODEC_I420, VLC_CODEC_J420, 0 },
 571         { VLC_CODEC_YV9,  VLC_CODEC_I410, 0 },
 572         { 0 }
 573     };
 574
 575     for( int i = 0; pp_swapped[i][0]; i++ )
 576     {
 577         if( pp_swapped[i][0] == b )
 578         {
 579             vlc_fourcc_t t = a;
 580             a = b;
 581             b = t;
 582         }
 583         if( pp_swapped[i][0] != a )
 584             continue;
 585         for( int j = 1; pp_swapped[i][j]; j++ )
 586         {
 587             if( pp_swapped[i][j] == b )
 588                 return true;
 589         }
 590     }
 591     return false;
 592 }
 593
 594 bool vlc_fourcc_IsYUV(vlc_fourcc_t fcc)
 595 {
 596     for( unsigned i = 0; p_list_YUV[i]; i++ )
 597     {
 598         if( p_list_YUV[i] == fcc )
 599             return true;
 600     }
 601     return false;
 602 }
 603
 604 #define PLANAR(n, w_den, h_den, size, bits) \
 605     { .plane_count = n, \
 606       .p = { {.w = {1,    1}, .h = {1,    1}}, \
 607              {.w = {1,w_den}, .h = {1,h_den}}, \
 608              {.w = {1,w_den}, .h = {1,h_den}}, \
 609              {.w = {1,    1}, .h = {1,    1}} }, \
 610       .pixel_size = size, \
 611       .pixel_bits = bits }
 612
 613 #define PLANAR_8(n, w_den, h_den)        PLANAR(n, w_den, h_den, 1, 8)
 614 #define PLANAR_16(n, w_den, h_den, bits) PLANAR(n, w_den, h_den, 2, bits)
 615
 616 #define PACKED_FMT(size, bits) \
 617     { .plane_count = 1, \
 618       .p = { {.w = {1,1}, .h = {1,1}} }, \
 619       .pixel_size = size, \
 620       .pixel_bits = bits }
 621
 622 /* Zero planes for hardware picture handles. Cannot be manipulated directly. */
 623 #define FAKE_FMT() \
 624     { .plane_count = 0, \
 625       .p = { {.w = {1,1}, .h = {1,1}} }, \
 626       .pixel_size = 0, \
 627       .pixel_bits = 0 }
 628
 629 static const struct
 630 {
 631     vlc_fourcc_t             p_fourcc[4];
 632     vlc_chroma_description_t description;
 633 } p_list_chroma_description[] = {
 634     { { VLC_CODEC_I411 },                      PLANAR_8(3, 4, 1) },
 635     { { VLC_CODEC_YUV_PLANAR_410 },            PLANAR_8(3, 4, 4) },
 636     { { VLC_CODEC_YUV_PLANAR_420 },            PLANAR_8(3, 2, 2) },
 637     { { VLC_CODEC_NV12, VLC_CODEC_NV21 },      PLANAR_8(2, 1, 2) },
 638     { { VLC_CODEC_YUV_PLANAR_422 },            PLANAR_8(3, 2, 1) },
 639     { { VLC_CODEC_NV16, VLC_CODEC_NV61 },      PLANAR_8(2, 1, 1) },
 640     { { VLC_CODEC_YUV_PLANAR_440 },            PLANAR_8(3, 1, 2) },
 641     { { VLC_CODEC_YUV_PLANAR_444 },            PLANAR_8(3, 1, 1) },
 642     { { VLC_CODEC_YUVA },                      PLANAR_8(4, 1, 1) },
 643     { { VLC_CODEC_YUV420A },                   PLANAR_8(4, 2, 2) },
 644     { { VLC_CODEC_YUV422A },                   PLANAR_8(4, 2, 1) },
 645
 646     { { VLC_CODEC_GBR_PLANAR },                PLANAR_8(3, 1, 1) },
 647     { { VLC_CODEC_GBR_PLANAR_9L,
 648         VLC_CODEC_GBR_PLANAR_9B },             PLANAR_16(3, 1, 1, 9) },
 649     { { VLC_CODEC_GBR_PLANAR_10L,
 650         VLC_CODEC_GBR_PLANAR_10B },            PLANAR_16(3, 1, 1, 10) },
 651
 652     { { VLC_CODEC_I420_16L,
 653         VLC_CODEC_I420_16B },                  PLANAR_16(3, 2, 2, 16) },
 654     { { VLC_CODEC_I420_12L,
 655         VLC_CODEC_I420_12B },                  PLANAR_16(3, 2, 2, 12) },
 656     { { VLC_CODEC_I420_10L,
 657         VLC_CODEC_I420_10B },                  PLANAR_16(3, 2, 2, 10) },
 658     { { VLC_CODEC_I420_9L,
 659         VLC_CODEC_I420_9B },                   PLANAR_16(3, 2, 2,  9) },
 660     { { VLC_CODEC_I422_12L,
 661         VLC_CODEC_I422_12B },                  PLANAR_16(3, 2, 1, 12) },
 662     { { VLC_CODEC_I422_10L,
 663         VLC_CODEC_I422_10B },                  PLANAR_16(3, 2, 1, 10) },
 664     { { VLC_CODEC_I422_9L,
 665         VLC_CODEC_I422_9B },                   PLANAR_16(3, 2, 1,  9) },
 666     { { VLC_CODEC_I444_12L,
 667         VLC_CODEC_I444_12B },                  PLANAR_16(3, 1, 1, 12) },
 668     { { VLC_CODEC_I444_10L,
 669         VLC_CODEC_I444_10B },                  PLANAR_16(3, 1, 1, 10) },
 670     { { VLC_CODEC_I444_9L,
 671         VLC_CODEC_I444_9B },                   PLANAR_16(3, 1, 1,  9) },
 672     { { VLC_CODEC_I444_16L,
 673         VLC_CODEC_I444_16B },                  PLANAR_16(3, 1, 1, 16) },
 674     { { VLC_CODEC_YUVA_444_10L,
 675         VLC_CODEC_YUVA_444_10B },              PLANAR_16(4, 1, 1, 10) },
 676     { { VLC_CODEC_P010 },                      PLANAR_16(2, 1, 2, 10) },
 677
 678     { { VLC_CODEC_YUV_PACKED },                PACKED_FMT(2, 16) },
 679     { { VLC_CODEC_RGB8, VLC_CODEC_GREY,
 680         VLC_CODEC_YUVP, VLC_CODEC_RGBP },      PACKED_FMT(1, 8) },
 681
 682     { { VLC_CODEC_RGB15, 0 },                  PACKED_FMT(2, 15) },
 683     { { VLC_CODEC_RGB12, 0 },                  PACKED_FMT(2, 12) },
 684     { { VLC_CODEC_RGB16, 0 },                  PACKED_FMT(2, 16) },
 685     { { VLC_CODEC_RGB24, 0 },                  PACKED_FMT(3, 24) },
 686     { { VLC_CODEC_RGB32, 0 },                  PACKED_FMT(4, 24) },
 687     { { VLC_CODEC_RGBA, VLC_CODEC_ARGB,
 688         VLC_CODEC_BGRA, },                     PACKED_FMT(4, 32) },
 689
 690     { { VLC_CODEC_Y211, 0 },                   { 1, { {{1,4}, {1,1}} }, 4, 32 } },
 691     { { VLC_CODEC_XYZ12,  0 },                 PACKED_FMT(6, 48) },
 692
 693     { { VLC_CODEC_VDPAU_VIDEO_420, VLC_CODEC_VDPAU_VIDEO_422,
 694         VLC_CODEC_VDPAU_VIDEO_444, VLC_CODEC_VDPAU_OUTPUT },
 695                                                FAKE_FMT() },
 696     { { VLC_CODEC_ANDROID_OPAQUE, VLC_CODEC_MMAL_OPAQUE,
 697         VLC_CODEC_D3D9_OPAQUE,    VLC_CODEC_D3D11_OPAQUE },
 698                                                FAKE_FMT() },
 699     { { VLC_CODEC_D3D11_OPAQUE_10B, VLC_CODEC_D3D9_OPAQUE_10B },
 700                                                FAKE_FMT() },
 701
 702     { { VLC_CODEC_CVPX_NV12, VLC_CODEC_CVPX_UYVY,
 703         VLC_CODEC_CVPX_I420, VLC_CODEC_CVPX_BGRA },
 704                                                FAKE_FMT() },
 705
 706     { { VLC_CODEC_VAAPI_420 },                 FAKE_FMT() },
 707
 708     { { 0 },                                   FAKE_FMT() }
 709 };
 710
 711 #undef PACKED_FMT
 712 #undef PLANAR_16
 713 #undef PLANAR_8
 714 #undef PLANAR
 715
 716 const vlc_chroma_description_t *vlc_fourcc_GetChromaDescription( vlc_fourcc_t i_fourcc )
 717 {
 718     for( unsigned i = 0; p_list_chroma_description[i].p_fourcc[0]; i++ )
 719     {
 720         const vlc_fourcc_t *p_fourcc = p_list_chroma_description[i].p_fourcc;
 721         for( unsigned j = 0; j < 4 && p_fourcc[j] != 0; j++ )
 722         {
 723             if( p_fourcc[j] == i_fourcc )
 724                 return &p_list_chroma_description[i].description;
 725         }
 726     }
 727     return NULL;
 728 }