| 1 | /* |
| 2 | * VMware Screen Codec (VMnc) decoder |
| 3 | * Copyright (c) 2006 Konstantin Shishkov |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * VMware Screen Codec (VMnc) decoder |
| 25 | * As Alex Beregszaszi discovered, this is effectively RFB data dump |
| 26 | */ |
| 27 | |
| 28 | #include <stdio.h> |
| 29 | #include <stdlib.h> |
| 30 | |
| 31 | #include "libavutil/common.h" |
| 32 | #include "libavutil/intreadwrite.h" |
| 33 | #include "avcodec.h" |
| 34 | #include "internal.h" |
| 35 | #include "bytestream.h" |
| 36 | |
| 37 | enum EncTypes { |
| 38 | MAGIC_WMVd = 0x574D5664, |
| 39 | MAGIC_WMVe, |
| 40 | MAGIC_WMVf, |
| 41 | MAGIC_WMVg, |
| 42 | MAGIC_WMVh, |
| 43 | MAGIC_WMVi, |
| 44 | MAGIC_WMVj |
| 45 | }; |
| 46 | |
| 47 | enum HexTile_Flags { |
| 48 | HT_RAW = 1, // tile is raw |
| 49 | HT_BKG = 2, // background color is present |
| 50 | HT_FG = 4, // foreground color is present |
| 51 | HT_SUB = 8, // subrects are present |
| 52 | HT_CLR = 16 // each subrect has own color |
| 53 | }; |
| 54 | |
| 55 | /* |
| 56 | * Decoder context |
| 57 | */ |
| 58 | typedef struct VmncContext { |
| 59 | AVCodecContext *avctx; |
| 60 | AVFrame *pic; |
| 61 | |
| 62 | int bpp; |
| 63 | int bpp2; |
| 64 | int bigendian; |
| 65 | uint8_t pal[768]; |
| 66 | int width, height; |
| 67 | GetByteContext gb; |
| 68 | |
| 69 | /* cursor data */ |
| 70 | int cur_w, cur_h; |
| 71 | int cur_x, cur_y; |
| 72 | int cur_hx, cur_hy; |
| 73 | uint8_t *curbits, *curmask; |
| 74 | uint8_t *screendta; |
| 75 | } VmncContext; |
| 76 | |
| 77 | /* read pixel value from stream */ |
| 78 | static av_always_inline int vmnc_get_pixel(GetByteContext *gb, int bpp, int be) |
| 79 | { |
| 80 | switch (bpp * 2 + be) { |
| 81 | case 2: |
| 82 | case 3: |
| 83 | return bytestream2_get_byte(gb); |
| 84 | case 4: |
| 85 | return bytestream2_get_le16(gb); |
| 86 | case 5: |
| 87 | return bytestream2_get_be16(gb); |
| 88 | case 8: |
| 89 | return bytestream2_get_le32(gb); |
| 90 | case 9: |
| 91 | return bytestream2_get_be32(gb); |
| 92 | default: return 0; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | static void load_cursor(VmncContext *c) |
| 97 | { |
| 98 | int i, j, p; |
| 99 | const int bpp = c->bpp2; |
| 100 | uint8_t *dst8 = c->curbits; |
| 101 | uint16_t *dst16 = (uint16_t *)c->curbits; |
| 102 | uint32_t *dst32 = (uint32_t *)c->curbits; |
| 103 | |
| 104 | for (j = 0; j < c->cur_h; j++) { |
| 105 | for (i = 0; i < c->cur_w; i++) { |
| 106 | p = vmnc_get_pixel(&c->gb, bpp, c->bigendian); |
| 107 | if (bpp == 1) |
| 108 | *dst8++ = p; |
| 109 | if (bpp == 2) |
| 110 | *dst16++ = p; |
| 111 | if (bpp == 4) |
| 112 | *dst32++ = p; |
| 113 | } |
| 114 | } |
| 115 | dst8 = c->curmask; |
| 116 | dst16 = (uint16_t*)c->curmask; |
| 117 | dst32 = (uint32_t*)c->curmask; |
| 118 | for (j = 0; j < c->cur_h; j++) { |
| 119 | for (i = 0; i < c->cur_w; i++) { |
| 120 | p = vmnc_get_pixel(&c->gb, bpp, c->bigendian); |
| 121 | if (bpp == 1) |
| 122 | *dst8++ = p; |
| 123 | if (bpp == 2) |
| 124 | *dst16++ = p; |
| 125 | if (bpp == 4) |
| 126 | *dst32++ = p; |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | static void put_cursor(uint8_t *dst, int stride, VmncContext *c, int dx, int dy) |
| 132 | { |
| 133 | int i, j; |
| 134 | int w, h, x, y; |
| 135 | w = c->cur_w; |
| 136 | if (c->width < c->cur_x + c->cur_w) |
| 137 | w = c->width - c->cur_x; |
| 138 | h = c->cur_h; |
| 139 | if (c->height < c->cur_y + c->cur_h) |
| 140 | h = c->height - c->cur_y; |
| 141 | x = c->cur_x; |
| 142 | y = c->cur_y; |
| 143 | if (x < 0) { |
| 144 | w += x; |
| 145 | x = 0; |
| 146 | } |
| 147 | if (y < 0) { |
| 148 | h += y; |
| 149 | y = 0; |
| 150 | } |
| 151 | |
| 152 | if ((w < 1) || (h < 1)) |
| 153 | return; |
| 154 | dst += x * c->bpp2 + y * stride; |
| 155 | |
| 156 | if (c->bpp2 == 1) { |
| 157 | uint8_t *cd = c->curbits, *msk = c->curmask; |
| 158 | for (j = 0; j < h; j++) { |
| 159 | for (i = 0; i < w; i++) |
| 160 | dst[i] = (dst[i] & cd[i]) ^ msk[i]; |
| 161 | msk += c->cur_w; |
| 162 | cd += c->cur_w; |
| 163 | dst += stride; |
| 164 | } |
| 165 | } else if (c->bpp2 == 2) { |
| 166 | uint16_t *cd = (uint16_t*)c->curbits, *msk = (uint16_t*)c->curmask; |
| 167 | uint16_t *dst2; |
| 168 | for (j = 0; j < h; j++) { |
| 169 | dst2 = (uint16_t*)dst; |
| 170 | for (i = 0; i < w; i++) |
| 171 | dst2[i] = (dst2[i] & cd[i]) ^ msk[i]; |
| 172 | msk += c->cur_w; |
| 173 | cd += c->cur_w; |
| 174 | dst += stride; |
| 175 | } |
| 176 | } else if (c->bpp2 == 4) { |
| 177 | uint32_t *cd = (uint32_t*)c->curbits, *msk = (uint32_t*)c->curmask; |
| 178 | uint32_t *dst2; |
| 179 | for (j = 0; j < h; j++) { |
| 180 | dst2 = (uint32_t*)dst; |
| 181 | for (i = 0; i < w; i++) |
| 182 | dst2[i] = (dst2[i] & cd[i]) ^ msk[i]; |
| 183 | msk += c->cur_w; |
| 184 | cd += c->cur_w; |
| 185 | dst += stride; |
| 186 | } |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | /* fill rectangle with given color */ |
| 191 | static av_always_inline void paint_rect(uint8_t *dst, int dx, int dy, |
| 192 | int w, int h, int color, |
| 193 | int bpp, int stride) |
| 194 | { |
| 195 | int i, j; |
| 196 | dst += dx * bpp + dy * stride; |
| 197 | if (bpp == 1) { |
| 198 | for (j = 0; j < h; j++) { |
| 199 | memset(dst, color, w); |
| 200 | dst += stride; |
| 201 | } |
| 202 | } else if (bpp == 2) { |
| 203 | uint16_t *dst2; |
| 204 | for (j = 0; j < h; j++) { |
| 205 | dst2 = (uint16_t*)dst; |
| 206 | for (i = 0; i < w; i++) |
| 207 | *dst2++ = color; |
| 208 | dst += stride; |
| 209 | } |
| 210 | } else if (bpp == 4) { |
| 211 | uint32_t *dst2; |
| 212 | for (j = 0; j < h; j++) { |
| 213 | dst2 = (uint32_t*)dst; |
| 214 | for (i = 0; i < w; i++) |
| 215 | dst2[i] = color; |
| 216 | dst += stride; |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | static av_always_inline void paint_raw(uint8_t *dst, int w, int h, |
| 222 | GetByteContext *gb, int bpp, |
| 223 | int be, int stride) |
| 224 | { |
| 225 | int i, j, p; |
| 226 | for (j = 0; j < h; j++) { |
| 227 | for (i = 0; i < w; i++) { |
| 228 | p = vmnc_get_pixel(gb, bpp, be); |
| 229 | switch (bpp) { |
| 230 | case 1: |
| 231 | dst[i] = p; |
| 232 | break; |
| 233 | case 2: |
| 234 | ((uint16_t*)dst)[i] = p; |
| 235 | break; |
| 236 | case 4: |
| 237 | ((uint32_t*)dst)[i] = p; |
| 238 | break; |
| 239 | } |
| 240 | } |
| 241 | dst += stride; |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | static int decode_hextile(VmncContext *c, uint8_t* dst, GetByteContext *gb, |
| 246 | int w, int h, int stride) |
| 247 | { |
| 248 | int i, j, k; |
| 249 | int bg = 0, fg = 0, rects, color, flags, xy, wh; |
| 250 | const int bpp = c->bpp2; |
| 251 | uint8_t *dst2; |
| 252 | int bw = 16, bh = 16; |
| 253 | |
| 254 | for (j = 0; j < h; j += 16) { |
| 255 | dst2 = dst; |
| 256 | bw = 16; |
| 257 | if (j + 16 > h) |
| 258 | bh = h - j; |
| 259 | for (i = 0; i < w; i += 16, dst2 += 16 * bpp) { |
| 260 | if (bytestream2_get_bytes_left(gb) <= 0) { |
| 261 | av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); |
| 262 | return AVERROR_INVALIDDATA; |
| 263 | } |
| 264 | if (i + 16 > w) |
| 265 | bw = w - i; |
| 266 | flags = bytestream2_get_byte(gb); |
| 267 | if (flags & HT_RAW) { |
| 268 | if (bytestream2_get_bytes_left(gb) < bw * bh * bpp) { |
| 269 | av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); |
| 270 | return AVERROR_INVALIDDATA; |
| 271 | } |
| 272 | paint_raw(dst2, bw, bh, gb, bpp, c->bigendian, stride); |
| 273 | } else { |
| 274 | if (flags & HT_BKG) |
| 275 | bg = vmnc_get_pixel(gb, bpp, c->bigendian); |
| 276 | if (flags & HT_FG) |
| 277 | fg = vmnc_get_pixel(gb, bpp, c->bigendian); |
| 278 | rects = 0; |
| 279 | if (flags & HT_SUB) |
| 280 | rects = bytestream2_get_byte(gb); |
| 281 | color = !!(flags & HT_CLR); |
| 282 | |
| 283 | paint_rect(dst2, 0, 0, bw, bh, bg, bpp, stride); |
| 284 | |
| 285 | if (bytestream2_get_bytes_left(gb) < rects * (color * bpp + 2)) { |
| 286 | av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); |
| 287 | return AVERROR_INVALIDDATA; |
| 288 | } |
| 289 | for (k = 0; k < rects; k++) { |
| 290 | if (color) |
| 291 | fg = vmnc_get_pixel(gb, bpp, c->bigendian); |
| 292 | xy = bytestream2_get_byte(gb); |
| 293 | wh = bytestream2_get_byte(gb); |
| 294 | if ( (xy >> 4) + (wh >> 4) + 1 > w - i |
| 295 | || (xy & 0xF) + (wh & 0xF)+1 > h - j) { |
| 296 | av_log(c->avctx, AV_LOG_ERROR, "Rectangle outside picture\n"); |
| 297 | return AVERROR_INVALIDDATA; |
| 298 | } |
| 299 | paint_rect(dst2, xy >> 4, xy & 0xF, |
| 300 | (wh>>4)+1, (wh & 0xF)+1, fg, bpp, stride); |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | dst += stride * 16; |
| 305 | } |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static void reset_buffers(VmncContext *c) |
| 310 | { |
| 311 | av_freep(&c->curbits); |
| 312 | av_freep(&c->curmask); |
| 313 | av_freep(&c->screendta); |
| 314 | c->cur_w = c->cur_h = 0; |
| 315 | c->cur_hx = c->cur_hy = 0; |
| 316 | |
| 317 | } |
| 318 | |
| 319 | static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
| 320 | AVPacket *avpkt) |
| 321 | { |
| 322 | const uint8_t *buf = avpkt->data; |
| 323 | int buf_size = avpkt->size; |
| 324 | VmncContext * const c = avctx->priv_data; |
| 325 | GetByteContext *gb = &c->gb; |
| 326 | uint8_t *outptr; |
| 327 | int dx, dy, w, h, depth, enc, chunks, res, size_left, ret; |
| 328 | |
| 329 | if ((ret = ff_reget_buffer(avctx, c->pic)) < 0) |
| 330 | return ret; |
| 331 | |
| 332 | bytestream2_init(gb, buf, buf_size); |
| 333 | |
| 334 | c->pic->key_frame = 0; |
| 335 | c->pic->pict_type = AV_PICTURE_TYPE_P; |
| 336 | |
| 337 | // restore screen after cursor |
| 338 | if (c->screendta) { |
| 339 | int i; |
| 340 | w = c->cur_w; |
| 341 | if (c->width < c->cur_x + w) |
| 342 | w = c->width - c->cur_x; |
| 343 | h = c->cur_h; |
| 344 | if (c->height < c->cur_y + h) |
| 345 | h = c->height - c->cur_y; |
| 346 | dx = c->cur_x; |
| 347 | if (dx < 0) { |
| 348 | w += dx; |
| 349 | dx = 0; |
| 350 | } |
| 351 | dy = c->cur_y; |
| 352 | if (dy < 0) { |
| 353 | h += dy; |
| 354 | dy = 0; |
| 355 | } |
| 356 | if ((w > 0) && (h > 0)) { |
| 357 | outptr = c->pic->data[0] + dx * c->bpp2 + dy * c->pic->linesize[0]; |
| 358 | for (i = 0; i < h; i++) { |
| 359 | memcpy(outptr, c->screendta + i * c->cur_w * c->bpp2, |
| 360 | w * c->bpp2); |
| 361 | outptr += c->pic->linesize[0]; |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | bytestream2_skip(gb, 2); |
| 366 | chunks = bytestream2_get_be16(gb); |
| 367 | while (chunks--) { |
| 368 | if (bytestream2_get_bytes_left(gb) < 12) { |
| 369 | av_log(avctx, AV_LOG_ERROR, "Premature end of data!\n"); |
| 370 | return -1; |
| 371 | } |
| 372 | dx = bytestream2_get_be16(gb); |
| 373 | dy = bytestream2_get_be16(gb); |
| 374 | w = bytestream2_get_be16(gb); |
| 375 | h = bytestream2_get_be16(gb); |
| 376 | enc = bytestream2_get_be32(gb); |
| 377 | outptr = c->pic->data[0] + dx * c->bpp2 + dy * c->pic->linesize[0]; |
| 378 | size_left = bytestream2_get_bytes_left(gb); |
| 379 | switch (enc) { |
| 380 | case MAGIC_WMVd: // cursor |
| 381 | if (w*(int64_t)h*c->bpp2 > INT_MAX/2 - 2) { |
| 382 | av_log(avctx, AV_LOG_ERROR, "dimensions too large\n"); |
| 383 | return AVERROR_INVALIDDATA; |
| 384 | } |
| 385 | if (size_left < 2 + w * h * c->bpp2 * 2) { |
| 386 | av_log(avctx, AV_LOG_ERROR, |
| 387 | "Premature end of data! (need %i got %i)\n", |
| 388 | 2 + w * h * c->bpp2 * 2, size_left); |
| 389 | return AVERROR_INVALIDDATA; |
| 390 | } |
| 391 | bytestream2_skip(gb, 2); |
| 392 | c->cur_w = w; |
| 393 | c->cur_h = h; |
| 394 | c->cur_hx = dx; |
| 395 | c->cur_hy = dy; |
| 396 | if ((c->cur_hx > c->cur_w) || (c->cur_hy > c->cur_h)) { |
| 397 | av_log(avctx, AV_LOG_ERROR, |
| 398 | "Cursor hot spot is not in image: " |
| 399 | "%ix%i of %ix%i cursor size\n", |
| 400 | c->cur_hx, c->cur_hy, c->cur_w, c->cur_h); |
| 401 | c->cur_hx = c->cur_hy = 0; |
| 402 | } |
| 403 | if (c->cur_w * c->cur_h >= INT_MAX / c->bpp2) { |
| 404 | reset_buffers(c); |
| 405 | return AVERROR(EINVAL); |
| 406 | } else { |
| 407 | int screen_size = c->cur_w * c->cur_h * c->bpp2; |
| 408 | if ((ret = av_reallocp(&c->curbits, screen_size)) < 0 || |
| 409 | (ret = av_reallocp(&c->curmask, screen_size)) < 0 || |
| 410 | (ret = av_reallocp(&c->screendta, screen_size)) < 0) { |
| 411 | reset_buffers(c); |
| 412 | return ret; |
| 413 | } |
| 414 | } |
| 415 | load_cursor(c); |
| 416 | break; |
| 417 | case MAGIC_WMVe: // unknown |
| 418 | bytestream2_skip(gb, 2); |
| 419 | break; |
| 420 | case MAGIC_WMVf: // update cursor position |
| 421 | c->cur_x = dx - c->cur_hx; |
| 422 | c->cur_y = dy - c->cur_hy; |
| 423 | break; |
| 424 | case MAGIC_WMVg: // unknown |
| 425 | bytestream2_skip(gb, 10); |
| 426 | break; |
| 427 | case MAGIC_WMVh: // unknown |
| 428 | bytestream2_skip(gb, 4); |
| 429 | break; |
| 430 | case MAGIC_WMVi: // ServerInitialization struct |
| 431 | c->pic->key_frame = 1; |
| 432 | c->pic->pict_type = AV_PICTURE_TYPE_I; |
| 433 | depth = bytestream2_get_byte(gb); |
| 434 | if (depth != c->bpp) { |
| 435 | av_log(avctx, AV_LOG_INFO, |
| 436 | "Depth mismatch. Container %i bpp, " |
| 437 | "Frame data: %i bpp\n", |
| 438 | c->bpp, depth); |
| 439 | } |
| 440 | bytestream2_skip(gb, 1); |
| 441 | c->bigendian = bytestream2_get_byte(gb); |
| 442 | if (c->bigendian & (~1)) { |
| 443 | av_log(avctx, AV_LOG_INFO, |
| 444 | "Invalid header: bigendian flag = %i\n", c->bigendian); |
| 445 | return AVERROR_INVALIDDATA; |
| 446 | } |
| 447 | //skip the rest of pixel format data |
| 448 | bytestream2_skip(gb, 13); |
| 449 | break; |
| 450 | case MAGIC_WMVj: // unknown |
| 451 | bytestream2_skip(gb, 2); |
| 452 | break; |
| 453 | case 0x00000000: // raw rectangle data |
| 454 | if ((dx + w > c->width) || (dy + h > c->height)) { |
| 455 | av_log(avctx, AV_LOG_ERROR, |
| 456 | "Incorrect frame size: %ix%i+%ix%i of %ix%i\n", |
| 457 | w, h, dx, dy, c->width, c->height); |
| 458 | return AVERROR_INVALIDDATA; |
| 459 | } |
| 460 | if (size_left < w * h * c->bpp2) { |
| 461 | av_log(avctx, AV_LOG_ERROR, |
| 462 | "Premature end of data! (need %i got %i)\n", |
| 463 | w * h * c->bpp2, size_left); |
| 464 | return AVERROR_INVALIDDATA; |
| 465 | } |
| 466 | paint_raw(outptr, w, h, gb, c->bpp2, c->bigendian, |
| 467 | c->pic->linesize[0]); |
| 468 | break; |
| 469 | case 0x00000005: // HexTile encoded rectangle |
| 470 | if ((dx + w > c->width) || (dy + h > c->height)) { |
| 471 | av_log(avctx, AV_LOG_ERROR, |
| 472 | "Incorrect frame size: %ix%i+%ix%i of %ix%i\n", |
| 473 | w, h, dx, dy, c->width, c->height); |
| 474 | return AVERROR_INVALIDDATA; |
| 475 | } |
| 476 | res = decode_hextile(c, outptr, gb, w, h, c->pic->linesize[0]); |
| 477 | if (res < 0) |
| 478 | return res; |
| 479 | break; |
| 480 | default: |
| 481 | av_log(avctx, AV_LOG_ERROR, "Unsupported block type 0x%08X\n", enc); |
| 482 | chunks = 0; // leave chunks decoding loop |
| 483 | } |
| 484 | } |
| 485 | if (c->screendta) { |
| 486 | int i; |
| 487 | // save screen data before painting cursor |
| 488 | w = c->cur_w; |
| 489 | if (c->width < c->cur_x + w) |
| 490 | w = c->width - c->cur_x; |
| 491 | h = c->cur_h; |
| 492 | if (c->height < c->cur_y + h) |
| 493 | h = c->height - c->cur_y; |
| 494 | dx = c->cur_x; |
| 495 | if (dx < 0) { |
| 496 | w += dx; |
| 497 | dx = 0; |
| 498 | } |
| 499 | dy = c->cur_y; |
| 500 | if (dy < 0) { |
| 501 | h += dy; |
| 502 | dy = 0; |
| 503 | } |
| 504 | if ((w > 0) && (h > 0)) { |
| 505 | outptr = c->pic->data[0] + dx * c->bpp2 + dy * c->pic->linesize[0]; |
| 506 | for (i = 0; i < h; i++) { |
| 507 | memcpy(c->screendta + i * c->cur_w * c->bpp2, outptr, |
| 508 | w * c->bpp2); |
| 509 | outptr += c->pic->linesize[0]; |
| 510 | } |
| 511 | outptr = c->pic->data[0]; |
| 512 | put_cursor(outptr, c->pic->linesize[0], c, c->cur_x, c->cur_y); |
| 513 | } |
| 514 | } |
| 515 | *got_frame = 1; |
| 516 | if ((ret = av_frame_ref(data, c->pic)) < 0) |
| 517 | return ret; |
| 518 | |
| 519 | /* always report that the buffer was completely consumed */ |
| 520 | return buf_size; |
| 521 | } |
| 522 | |
| 523 | static av_cold int decode_init(AVCodecContext *avctx) |
| 524 | { |
| 525 | VmncContext * const c = avctx->priv_data; |
| 526 | |
| 527 | c->avctx = avctx; |
| 528 | c->width = avctx->width; |
| 529 | c->height = avctx->height; |
| 530 | c->bpp = avctx->bits_per_coded_sample; |
| 531 | c->bpp2 = c->bpp / 8; |
| 532 | |
| 533 | switch (c->bpp) { |
| 534 | case 8: |
| 535 | avctx->pix_fmt = AV_PIX_FMT_PAL8; |
| 536 | break; |
| 537 | case 16: |
| 538 | avctx->pix_fmt = AV_PIX_FMT_RGB555; |
| 539 | break; |
| 540 | case 32: |
| 541 | avctx->pix_fmt = AV_PIX_FMT_RGB32; |
| 542 | break; |
| 543 | default: |
| 544 | av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", c->bpp); |
| 545 | return AVERROR_INVALIDDATA; |
| 546 | } |
| 547 | |
| 548 | c->pic = av_frame_alloc(); |
| 549 | if (!c->pic) |
| 550 | return AVERROR(ENOMEM); |
| 551 | |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | static av_cold int decode_end(AVCodecContext *avctx) |
| 556 | { |
| 557 | VmncContext * const c = avctx->priv_data; |
| 558 | |
| 559 | av_frame_free(&c->pic); |
| 560 | |
| 561 | av_freep(&c->curbits); |
| 562 | av_freep(&c->curmask); |
| 563 | av_freep(&c->screendta); |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | AVCodec ff_vmnc_decoder = { |
| 568 | .name = "vmnc", |
| 569 | .long_name = NULL_IF_CONFIG_SMALL("VMware Screen Codec / VMware Video"), |
| 570 | .type = AVMEDIA_TYPE_VIDEO, |
| 571 | .id = AV_CODEC_ID_VMNC, |
| 572 | .priv_data_size = sizeof(VmncContext), |
| 573 | .init = decode_init, |
| 574 | .close = decode_end, |
| 575 | .decode = decode_frame, |
| 576 | .capabilities = CODEC_CAP_DR1, |
| 577 | }; |