| 1 | /* |
| 2 | * Dxtory decoder |
| 3 | * |
| 4 | * Copyright (c) 2011 Konstantin Shishkov |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #include <inttypes.h> |
| 24 | |
| 25 | #define BITSTREAM_READER_LE |
| 26 | #include "avcodec.h" |
| 27 | #include "bytestream.h" |
| 28 | #include "get_bits.h" |
| 29 | #include "internal.h" |
| 30 | #include "unary.h" |
| 31 | #include "libavutil/common.h" |
| 32 | #include "libavutil/intreadwrite.h" |
| 33 | |
| 34 | static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic, |
| 35 | const uint8_t *src, int src_size, |
| 36 | int id, int bpp) |
| 37 | { |
| 38 | int h; |
| 39 | uint8_t *dst; |
| 40 | int ret; |
| 41 | |
| 42 | if (src_size < avctx->width * avctx->height * (int64_t)bpp) { |
| 43 | av_log(avctx, AV_LOG_ERROR, "packet too small\n"); |
| 44 | return AVERROR_INVALIDDATA; |
| 45 | } |
| 46 | |
| 47 | avctx->pix_fmt = id; |
| 48 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 49 | return ret; |
| 50 | |
| 51 | dst = pic->data[0]; |
| 52 | for (h = 0; h < avctx->height; h++) { |
| 53 | memcpy(dst, src, avctx->width * bpp); |
| 54 | src += avctx->width * bpp; |
| 55 | dst += pic->linesize[0]; |
| 56 | } |
| 57 | |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic, |
| 62 | const uint8_t *src, int src_size) |
| 63 | { |
| 64 | int h, w; |
| 65 | uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V; |
| 66 | int ret; |
| 67 | |
| 68 | if (src_size < avctx->width * avctx->height * 9L / 8) { |
| 69 | av_log(avctx, AV_LOG_ERROR, "packet too small\n"); |
| 70 | return AVERROR_INVALIDDATA; |
| 71 | } |
| 72 | |
| 73 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
| 74 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 75 | return ret; |
| 76 | |
| 77 | Y1 = pic->data[0]; |
| 78 | Y2 = pic->data[0] + pic->linesize[0]; |
| 79 | Y3 = pic->data[0] + pic->linesize[0] * 2; |
| 80 | Y4 = pic->data[0] + pic->linesize[0] * 3; |
| 81 | U = pic->data[1]; |
| 82 | V = pic->data[2]; |
| 83 | for (h = 0; h < avctx->height; h += 4) { |
| 84 | for (w = 0; w < avctx->width; w += 4) { |
| 85 | AV_COPY32U(Y1 + w, src); |
| 86 | AV_COPY32U(Y2 + w, src + 4); |
| 87 | AV_COPY32U(Y3 + w, src + 8); |
| 88 | AV_COPY32U(Y4 + w, src + 12); |
| 89 | U[w >> 2] = src[16] + 0x80; |
| 90 | V[w >> 2] = src[17] + 0x80; |
| 91 | src += 18; |
| 92 | } |
| 93 | Y1 += pic->linesize[0] << 2; |
| 94 | Y2 += pic->linesize[0] << 2; |
| 95 | Y3 += pic->linesize[0] << 2; |
| 96 | Y4 += pic->linesize[0] << 2; |
| 97 | U += pic->linesize[1]; |
| 98 | V += pic->linesize[2]; |
| 99 | } |
| 100 | |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic, |
| 105 | const uint8_t *src, int src_size) |
| 106 | { |
| 107 | int h, w; |
| 108 | uint8_t *Y1, *Y2, *U, *V; |
| 109 | int ret; |
| 110 | |
| 111 | if (src_size < avctx->width * avctx->height * 3L / 2) { |
| 112 | av_log(avctx, AV_LOG_ERROR, "packet too small\n"); |
| 113 | return AVERROR_INVALIDDATA; |
| 114 | } |
| 115 | |
| 116 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 117 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 118 | return ret; |
| 119 | |
| 120 | Y1 = pic->data[0]; |
| 121 | Y2 = pic->data[0] + pic->linesize[0]; |
| 122 | U = pic->data[1]; |
| 123 | V = pic->data[2]; |
| 124 | for (h = 0; h < avctx->height; h += 2) { |
| 125 | for (w = 0; w < avctx->width; w += 2) { |
| 126 | AV_COPY16(Y1 + w, src); |
| 127 | AV_COPY16(Y2 + w, src + 2); |
| 128 | U[w >> 1] = src[4] + 0x80; |
| 129 | V[w >> 1] = src[5] + 0x80; |
| 130 | src += 6; |
| 131 | } |
| 132 | Y1 += pic->linesize[0] << 1; |
| 133 | Y2 += pic->linesize[0] << 1; |
| 134 | U += pic->linesize[1]; |
| 135 | V += pic->linesize[2]; |
| 136 | } |
| 137 | |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic, |
| 142 | const uint8_t *src, int src_size) |
| 143 | { |
| 144 | int h, w; |
| 145 | uint8_t *Y, *U, *V; |
| 146 | int ret; |
| 147 | |
| 148 | if (src_size < avctx->width * avctx->height * 3L) { |
| 149 | av_log(avctx, AV_LOG_ERROR, "packet too small\n"); |
| 150 | return AVERROR_INVALIDDATA; |
| 151 | } |
| 152 | |
| 153 | avctx->pix_fmt = AV_PIX_FMT_YUV444P; |
| 154 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 155 | return ret; |
| 156 | |
| 157 | Y = pic->data[0]; |
| 158 | U = pic->data[1]; |
| 159 | V = pic->data[2]; |
| 160 | for (h = 0; h < avctx->height; h++) { |
| 161 | for (w = 0; w < avctx->width; w++) { |
| 162 | Y[w] = *src++; |
| 163 | U[w] = *src++ ^ 0x80; |
| 164 | V[w] = *src++ ^ 0x80; |
| 165 | } |
| 166 | Y += pic->linesize[0]; |
| 167 | U += pic->linesize[1]; |
| 168 | V += pic->linesize[2]; |
| 169 | } |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF }; |
| 175 | static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F }; |
| 176 | static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F }; |
| 177 | |
| 178 | static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8]) |
| 179 | { |
| 180 | uint8_t c, val; |
| 181 | |
| 182 | c = get_unary(gb, 0, 8); |
| 183 | if (!c) { |
| 184 | val = get_bits(gb, 8); |
| 185 | memmove(lru + 1, lru, sizeof(*lru) * (8 - 1)); |
| 186 | } else { |
| 187 | val = lru[c - 1]; |
| 188 | memmove(lru + 1, lru, sizeof(*lru) * (c - 1)); |
| 189 | } |
| 190 | lru[0] = val; |
| 191 | |
| 192 | return val; |
| 193 | } |
| 194 | |
| 195 | static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8], |
| 196 | int bits) |
| 197 | { |
| 198 | uint8_t c, val; |
| 199 | |
| 200 | c = get_unary(gb, 0, bits); |
| 201 | if (!c) { |
| 202 | val = get_bits(gb, bits); |
| 203 | memmove(lru + 1, lru, sizeof(*lru) * (6 - 1)); |
| 204 | } else { |
| 205 | val = lru[c - 1]; |
| 206 | memmove(lru + 1, lru, sizeof(*lru) * (c - 1)); |
| 207 | } |
| 208 | lru[0] = val; |
| 209 | |
| 210 | return val; |
| 211 | } |
| 212 | |
| 213 | static int dx2_decode_slice_565(GetBitContext *gb, int width, int height, |
| 214 | uint8_t *dst, int stride, int is_565) |
| 215 | { |
| 216 | int x, y; |
| 217 | int r, g, b; |
| 218 | uint8_t lru[3][8]; |
| 219 | |
| 220 | memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru)); |
| 221 | memcpy(lru[1], is_565 ? def_lru_565 : def_lru_555, 8 * sizeof(*def_lru)); |
| 222 | memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru)); |
| 223 | |
| 224 | for (y = 0; y < height; y++) { |
| 225 | for (x = 0; x < width; x++) { |
| 226 | b = decode_sym_565(gb, lru[0], 5); |
| 227 | g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5); |
| 228 | r = decode_sym_565(gb, lru[2], 5); |
| 229 | dst[x * 3 + 0] = (r << 3) | (r >> 2); |
| 230 | dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2); |
| 231 | dst[x * 3 + 2] = (b << 3) | (b >> 2); |
| 232 | } |
| 233 | |
| 234 | dst += stride; |
| 235 | } |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic, |
| 241 | const uint8_t *src, int src_size, int is_565) |
| 242 | { |
| 243 | GetByteContext gb; |
| 244 | GetBitContext gb2; |
| 245 | int nslices, slice, slice_height; |
| 246 | uint32_t off, slice_size; |
| 247 | uint8_t *dst; |
| 248 | int ret; |
| 249 | |
| 250 | bytestream2_init(&gb, src, src_size); |
| 251 | nslices = bytestream2_get_le16(&gb); |
| 252 | off = FFALIGN(nslices * 4 + 2, 16); |
| 253 | if (src_size < off) { |
| 254 | av_log(avctx, AV_LOG_ERROR, "no slice data\n"); |
| 255 | return AVERROR_INVALIDDATA; |
| 256 | } |
| 257 | |
| 258 | if (!nslices || avctx->height % nslices) { |
| 259 | avpriv_request_sample(avctx, "%d slices for %dx%d", nslices, |
| 260 | avctx->width, avctx->height); |
| 261 | return AVERROR_PATCHWELCOME; |
| 262 | } |
| 263 | |
| 264 | slice_height = avctx->height / nslices; |
| 265 | avctx->pix_fmt = AV_PIX_FMT_RGB24; |
| 266 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 267 | return ret; |
| 268 | |
| 269 | dst = pic->data[0]; |
| 270 | for (slice = 0; slice < nslices; slice++) { |
| 271 | slice_size = bytestream2_get_le32(&gb); |
| 272 | if (slice_size > src_size - off) { |
| 273 | av_log(avctx, AV_LOG_ERROR, |
| 274 | "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n", |
| 275 | slice_size, src_size - off); |
| 276 | return AVERROR_INVALIDDATA; |
| 277 | } |
| 278 | if (slice_size <= 16) { |
| 279 | av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size); |
| 280 | return AVERROR_INVALIDDATA; |
| 281 | } |
| 282 | |
| 283 | if (AV_RL32(src + off) != slice_size - 16) { |
| 284 | av_log(avctx, AV_LOG_ERROR, |
| 285 | "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n", |
| 286 | AV_RL32(src + off), slice_size - 16); |
| 287 | } |
| 288 | init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8); |
| 289 | dx2_decode_slice_565(&gb2, avctx->width, slice_height, dst, |
| 290 | pic->linesize[0], is_565); |
| 291 | |
| 292 | dst += pic->linesize[0] * slice_height; |
| 293 | off += slice_size; |
| 294 | } |
| 295 | |
| 296 | return 0; |
| 297 | } |
| 298 | |
| 299 | static int dx2_decode_slice_rgb(GetBitContext *gb, int width, int height, |
| 300 | uint8_t *dst, int stride) |
| 301 | { |
| 302 | int x, y, i; |
| 303 | uint8_t lru[3][8]; |
| 304 | |
| 305 | for (i = 0; i < 3; i++) |
| 306 | memcpy(lru[i], def_lru, 8 * sizeof(*def_lru)); |
| 307 | |
| 308 | for (y = 0; y < height; y++) { |
| 309 | for (x = 0; x < width; x++) { |
| 310 | dst[x * 3 + 0] = decode_sym(gb, lru[0]); |
| 311 | dst[x * 3 + 1] = decode_sym(gb, lru[1]); |
| 312 | dst[x * 3 + 2] = decode_sym(gb, lru[2]); |
| 313 | } |
| 314 | |
| 315 | dst += stride; |
| 316 | } |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic, |
| 322 | const uint8_t *src, int src_size) |
| 323 | { |
| 324 | GetByteContext gb; |
| 325 | GetBitContext gb2; |
| 326 | int nslices, slice, slice_height; |
| 327 | uint32_t off, slice_size; |
| 328 | uint8_t *dst; |
| 329 | int ret; |
| 330 | |
| 331 | bytestream2_init(&gb, src, src_size); |
| 332 | nslices = bytestream2_get_le16(&gb); |
| 333 | off = FFALIGN(nslices * 4 + 2, 16); |
| 334 | if (src_size < off) { |
| 335 | av_log(avctx, AV_LOG_ERROR, "no slice data\n"); |
| 336 | return AVERROR_INVALIDDATA; |
| 337 | } |
| 338 | |
| 339 | if (!nslices || avctx->height % nslices) { |
| 340 | avpriv_request_sample(avctx, "%d slices for %dx%d", nslices, |
| 341 | avctx->width, avctx->height); |
| 342 | return AVERROR_PATCHWELCOME; |
| 343 | } |
| 344 | |
| 345 | slice_height = avctx->height / nslices; |
| 346 | avctx->pix_fmt = AV_PIX_FMT_BGR24; |
| 347 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 348 | return ret; |
| 349 | |
| 350 | dst = pic->data[0]; |
| 351 | for (slice = 0; slice < nslices; slice++) { |
| 352 | slice_size = bytestream2_get_le32(&gb); |
| 353 | if (slice_size > src_size - off) { |
| 354 | av_log(avctx, AV_LOG_ERROR, |
| 355 | "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n", |
| 356 | slice_size, src_size - off); |
| 357 | return AVERROR_INVALIDDATA; |
| 358 | } |
| 359 | if (slice_size <= 16) { |
| 360 | av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", |
| 361 | slice_size); |
| 362 | return AVERROR_INVALIDDATA; |
| 363 | } |
| 364 | |
| 365 | if (AV_RL32(src + off) != slice_size - 16) { |
| 366 | av_log(avctx, AV_LOG_ERROR, |
| 367 | "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n", |
| 368 | AV_RL32(src + off), slice_size - 16); |
| 369 | } |
| 370 | init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8); |
| 371 | dx2_decode_slice_rgb(&gb2, avctx->width, slice_height, dst, |
| 372 | pic->linesize[0]); |
| 373 | |
| 374 | dst += pic->linesize[0] * slice_height; |
| 375 | off += slice_size; |
| 376 | } |
| 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static int dx2_decode_slice_410(GetBitContext *gb, int width, int height, |
| 382 | uint8_t *Y, uint8_t *U, uint8_t *V, |
| 383 | int ystride, int ustride, int vstride) |
| 384 | { |
| 385 | int x, y, i, j; |
| 386 | uint8_t lru[3][8]; |
| 387 | |
| 388 | for (i = 0; i < 3; i++) |
| 389 | memcpy(lru[i], def_lru, 8 * sizeof(*def_lru)); |
| 390 | |
| 391 | for (y = 0; y < height; y += 4) { |
| 392 | for (x = 0; x < width; x += 4) { |
| 393 | for (j = 0; j < 4; j++) |
| 394 | for (i = 0; i < 4; i++) |
| 395 | Y[x + i + j * ystride] = decode_sym(gb, lru[0]); |
| 396 | U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80; |
| 397 | V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80; |
| 398 | } |
| 399 | |
| 400 | Y += ystride << 2; |
| 401 | U += ustride; |
| 402 | V += vstride; |
| 403 | } |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic, |
| 409 | const uint8_t *src, int src_size) |
| 410 | { |
| 411 | GetByteContext gb; |
| 412 | GetBitContext gb2; |
| 413 | int nslices, slice, slice_height; |
| 414 | int cur_y, next_y; |
| 415 | uint32_t off, slice_size; |
| 416 | uint8_t *Y, *U, *V; |
| 417 | int ret; |
| 418 | |
| 419 | bytestream2_init(&gb, src, src_size); |
| 420 | nslices = bytestream2_get_le16(&gb); |
| 421 | off = FFALIGN(nslices * 4 + 2, 16); |
| 422 | if (src_size < off) { |
| 423 | av_log(avctx, AV_LOG_ERROR, "no slice data\n"); |
| 424 | return AVERROR_INVALIDDATA; |
| 425 | } |
| 426 | |
| 427 | if (!nslices) { |
| 428 | avpriv_request_sample(avctx, "%d slices for %dx%d", nslices, |
| 429 | avctx->width, avctx->height); |
| 430 | return AVERROR_PATCHWELCOME; |
| 431 | } |
| 432 | |
| 433 | if ((avctx->width & 3) || (avctx->height & 3)) { |
| 434 | avpriv_request_sample(avctx, "Frame dimensions %dx%d", |
| 435 | avctx->width, avctx->height); |
| 436 | } |
| 437 | |
| 438 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
| 439 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 440 | return ret; |
| 441 | |
| 442 | Y = pic->data[0]; |
| 443 | U = pic->data[1]; |
| 444 | V = pic->data[2]; |
| 445 | |
| 446 | cur_y = 0; |
| 447 | for (slice = 0; slice < nslices; slice++) { |
| 448 | slice_size = bytestream2_get_le32(&gb); |
| 449 | next_y = ((slice + 1) * avctx->height) / nslices; |
| 450 | slice_height = (next_y & ~3) - (cur_y & ~3); |
| 451 | if (slice_size > src_size - off) { |
| 452 | av_log(avctx, AV_LOG_ERROR, |
| 453 | "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n", |
| 454 | slice_size, src_size - off); |
| 455 | return AVERROR_INVALIDDATA; |
| 456 | } |
| 457 | if (slice_size <= 16) { |
| 458 | av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size); |
| 459 | return AVERROR_INVALIDDATA; |
| 460 | } |
| 461 | |
| 462 | if (AV_RL32(src + off) != slice_size - 16) { |
| 463 | av_log(avctx, AV_LOG_ERROR, |
| 464 | "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n", |
| 465 | AV_RL32(src + off), slice_size - 16); |
| 466 | } |
| 467 | init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8); |
| 468 | dx2_decode_slice_410(&gb2, avctx->width, slice_height, Y, U, V, |
| 469 | pic->linesize[0], pic->linesize[1], |
| 470 | pic->linesize[2]); |
| 471 | |
| 472 | Y += pic->linesize[0] * slice_height; |
| 473 | U += pic->linesize[1] * (slice_height >> 2); |
| 474 | V += pic->linesize[2] * (slice_height >> 2); |
| 475 | off += slice_size; |
| 476 | cur_y = next_y; |
| 477 | } |
| 478 | |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | static int dx2_decode_slice_420(GetBitContext *gb, int width, int height, |
| 483 | uint8_t *Y, uint8_t *U, uint8_t *V, |
| 484 | int ystride, int ustride, int vstride) |
| 485 | { |
| 486 | int x, y, i; |
| 487 | uint8_t lru[3][8]; |
| 488 | |
| 489 | for (i = 0; i < 3; i++) |
| 490 | memcpy(lru[i], def_lru, 8 * sizeof(*def_lru)); |
| 491 | |
| 492 | for (y = 0; y < height; y+=2) { |
| 493 | for (x = 0; x < width; x += 2) { |
| 494 | Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]); |
| 495 | Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]); |
| 496 | Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]); |
| 497 | Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]); |
| 498 | U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80; |
| 499 | V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80; |
| 500 | } |
| 501 | |
| 502 | Y += ystride << 1; |
| 503 | U += ustride; |
| 504 | V += vstride; |
| 505 | } |
| 506 | |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic, |
| 511 | const uint8_t *src, int src_size) |
| 512 | { |
| 513 | GetByteContext gb; |
| 514 | GetBitContext gb2; |
| 515 | int nslices, slice, slice_height; |
| 516 | int cur_y, next_y; |
| 517 | uint32_t off, slice_size; |
| 518 | uint8_t *Y, *U, *V; |
| 519 | int ret; |
| 520 | |
| 521 | bytestream2_init(&gb, src, src_size); |
| 522 | nslices = bytestream2_get_le16(&gb); |
| 523 | off = FFALIGN(nslices * 4 + 2, 16); |
| 524 | if (src_size < off) { |
| 525 | av_log(avctx, AV_LOG_ERROR, "no slice data\n"); |
| 526 | return AVERROR_INVALIDDATA; |
| 527 | } |
| 528 | |
| 529 | if (!nslices) { |
| 530 | avpriv_request_sample(avctx, "%d slices for %dx%d", nslices, |
| 531 | avctx->width, avctx->height); |
| 532 | return AVERROR_PATCHWELCOME; |
| 533 | } |
| 534 | |
| 535 | if ((avctx->width & 1) || (avctx->height & 1)) { |
| 536 | avpriv_request_sample(avctx, "Frame dimensions %dx%d", |
| 537 | avctx->width, avctx->height); |
| 538 | } |
| 539 | |
| 540 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 541 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 542 | return ret; |
| 543 | |
| 544 | Y = pic->data[0]; |
| 545 | U = pic->data[1]; |
| 546 | V = pic->data[2]; |
| 547 | |
| 548 | cur_y = 0; |
| 549 | for (slice = 0; slice < nslices; slice++) { |
| 550 | slice_size = bytestream2_get_le32(&gb); |
| 551 | next_y = ((slice + 1) * avctx->height) / nslices; |
| 552 | slice_height = (next_y & ~1) - (cur_y & ~1); |
| 553 | if (slice_size > src_size - off) { |
| 554 | av_log(avctx, AV_LOG_ERROR, |
| 555 | "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n", |
| 556 | slice_size, src_size - off); |
| 557 | return AVERROR_INVALIDDATA; |
| 558 | } |
| 559 | if (slice_size <= 16) { |
| 560 | av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size); |
| 561 | return AVERROR_INVALIDDATA; |
| 562 | } |
| 563 | |
| 564 | if (AV_RL32(src + off) != slice_size - 16) { |
| 565 | av_log(avctx, AV_LOG_ERROR, |
| 566 | "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n", |
| 567 | AV_RL32(src + off), slice_size - 16); |
| 568 | } |
| 569 | init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8); |
| 570 | dx2_decode_slice_420(&gb2, avctx->width, slice_height, Y, U, V, |
| 571 | pic->linesize[0], pic->linesize[1], |
| 572 | pic->linesize[2]); |
| 573 | |
| 574 | Y += pic->linesize[0] * slice_height; |
| 575 | U += pic->linesize[1] * (slice_height >> 1); |
| 576 | V += pic->linesize[2] * (slice_height >> 1); |
| 577 | off += slice_size; |
| 578 | cur_y = next_y; |
| 579 | } |
| 580 | |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | static int dx2_decode_slice_444(GetBitContext *gb, int width, int height, |
| 585 | uint8_t *Y, uint8_t *U, uint8_t *V, |
| 586 | int ystride, int ustride, int vstride) |
| 587 | { |
| 588 | int x, y, i; |
| 589 | uint8_t lru[3][8]; |
| 590 | |
| 591 | for (i = 0; i < 3; i++) |
| 592 | memcpy(lru[i], def_lru, 8 * sizeof(*def_lru)); |
| 593 | |
| 594 | for (y = 0; y < height; y++) { |
| 595 | for (x = 0; x < width; x++) { |
| 596 | Y[x] = decode_sym(gb, lru[0]); |
| 597 | U[x] = decode_sym(gb, lru[1]) ^ 0x80; |
| 598 | V[x] = decode_sym(gb, lru[2]) ^ 0x80; |
| 599 | } |
| 600 | |
| 601 | Y += ystride; |
| 602 | U += ustride; |
| 603 | V += vstride; |
| 604 | } |
| 605 | |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic, |
| 610 | const uint8_t *src, int src_size) |
| 611 | { |
| 612 | GetByteContext gb; |
| 613 | GetBitContext gb2; |
| 614 | int nslices, slice, slice_height; |
| 615 | uint32_t off, slice_size; |
| 616 | uint8_t *Y, *U, *V; |
| 617 | int ret; |
| 618 | |
| 619 | bytestream2_init(&gb, src, src_size); |
| 620 | nslices = bytestream2_get_le16(&gb); |
| 621 | off = FFALIGN(nslices * 4 + 2, 16); |
| 622 | if (src_size < off) { |
| 623 | av_log(avctx, AV_LOG_ERROR, "no slice data\n"); |
| 624 | return AVERROR_INVALIDDATA; |
| 625 | } |
| 626 | |
| 627 | if (!nslices || avctx->height % nslices) { |
| 628 | avpriv_request_sample(avctx, "%d slices for %dx%d", nslices, |
| 629 | avctx->width, avctx->height); |
| 630 | return AVERROR_PATCHWELCOME; |
| 631 | } |
| 632 | |
| 633 | slice_height = avctx->height / nslices; |
| 634 | |
| 635 | avctx->pix_fmt = AV_PIX_FMT_YUV444P; |
| 636 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 637 | return ret; |
| 638 | |
| 639 | Y = pic->data[0]; |
| 640 | U = pic->data[1]; |
| 641 | V = pic->data[2]; |
| 642 | |
| 643 | for (slice = 0; slice < nslices; slice++) { |
| 644 | slice_size = bytestream2_get_le32(&gb); |
| 645 | if (slice_size > src_size - off) { |
| 646 | av_log(avctx, AV_LOG_ERROR, |
| 647 | "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n", |
| 648 | slice_size, src_size - off); |
| 649 | return AVERROR_INVALIDDATA; |
| 650 | } |
| 651 | if (slice_size <= 16) { |
| 652 | av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size); |
| 653 | return AVERROR_INVALIDDATA; |
| 654 | } |
| 655 | |
| 656 | if (AV_RL32(src + off) != slice_size - 16) { |
| 657 | av_log(avctx, AV_LOG_ERROR, |
| 658 | "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n", |
| 659 | AV_RL32(src + off), slice_size - 16); |
| 660 | } |
| 661 | init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8); |
| 662 | dx2_decode_slice_444(&gb2, avctx->width, slice_height, Y, U, V, |
| 663 | pic->linesize[0], pic->linesize[1], |
| 664 | pic->linesize[2]); |
| 665 | |
| 666 | Y += pic->linesize[0] * slice_height; |
| 667 | U += pic->linesize[1] * slice_height; |
| 668 | V += pic->linesize[2] * slice_height; |
| 669 | off += slice_size; |
| 670 | } |
| 671 | |
| 672 | return 0; |
| 673 | } |
| 674 | |
| 675 | static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
| 676 | AVPacket *avpkt) |
| 677 | { |
| 678 | AVFrame *pic = data; |
| 679 | const uint8_t *src = avpkt->data; |
| 680 | int ret; |
| 681 | |
| 682 | if (avpkt->size < 16) { |
| 683 | av_log(avctx, AV_LOG_ERROR, "packet too small\n"); |
| 684 | return AVERROR_INVALIDDATA; |
| 685 | } |
| 686 | |
| 687 | switch (AV_RB32(src)) { |
| 688 | case 0x01000001: |
| 689 | ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16, |
| 690 | AV_PIX_FMT_BGR24, 3); |
| 691 | break; |
| 692 | case 0x01000009: |
| 693 | ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16); |
| 694 | break; |
| 695 | case 0x02000001: |
| 696 | ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16); |
| 697 | break; |
| 698 | case 0x02000009: |
| 699 | ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16); |
| 700 | break; |
| 701 | case 0x03000001: |
| 702 | ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16); |
| 703 | break; |
| 704 | case 0x03000009: |
| 705 | ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16); |
| 706 | break; |
| 707 | case 0x04000001: |
| 708 | ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16); |
| 709 | break; |
| 710 | case 0x04000009: |
| 711 | ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16); |
| 712 | break; |
| 713 | case 0x17000001: |
| 714 | ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16, |
| 715 | AV_PIX_FMT_RGB565LE, 2); |
| 716 | break; |
| 717 | case 0x17000009: |
| 718 | ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1); |
| 719 | break; |
| 720 | case 0x18000001: |
| 721 | case 0x19000001: |
| 722 | ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16, |
| 723 | AV_PIX_FMT_RGB555LE, 2); |
| 724 | break; |
| 725 | case 0x18000009: |
| 726 | case 0x19000009: |
| 727 | ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0); |
| 728 | break; |
| 729 | default: |
| 730 | avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src)); |
| 731 | return AVERROR_PATCHWELCOME; |
| 732 | } |
| 733 | |
| 734 | if (ret) |
| 735 | return ret; |
| 736 | |
| 737 | pic->pict_type = AV_PICTURE_TYPE_I; |
| 738 | pic->key_frame = 1; |
| 739 | *got_frame = 1; |
| 740 | |
| 741 | return avpkt->size; |
| 742 | } |
| 743 | |
| 744 | AVCodec ff_dxtory_decoder = { |
| 745 | .name = "dxtory", |
| 746 | .long_name = NULL_IF_CONFIG_SMALL("Dxtory"), |
| 747 | .type = AVMEDIA_TYPE_VIDEO, |
| 748 | .id = AV_CODEC_ID_DXTORY, |
| 749 | .decode = decode_frame, |
| 750 | .capabilities = CODEC_CAP_DR1, |
| 751 | }; |