| 1 | /* |
| 2 | * Zip Motion Blocks Video (ZMBV) 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 | * Zip Motion Blocks Video decoder |
| 25 | */ |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <stdlib.h> |
| 29 | |
| 30 | #include "libavutil/common.h" |
| 31 | #include "libavutil/imgutils.h" |
| 32 | #include "libavutil/intreadwrite.h" |
| 33 | #include "avcodec.h" |
| 34 | #include "internal.h" |
| 35 | |
| 36 | #include <zlib.h> |
| 37 | |
| 38 | #define ZMBV_KEYFRAME 1 |
| 39 | #define ZMBV_DELTAPAL 2 |
| 40 | |
| 41 | enum ZmbvFormat { |
| 42 | ZMBV_FMT_NONE = 0, |
| 43 | ZMBV_FMT_1BPP = 1, |
| 44 | ZMBV_FMT_2BPP = 2, |
| 45 | ZMBV_FMT_4BPP = 3, |
| 46 | ZMBV_FMT_8BPP = 4, |
| 47 | ZMBV_FMT_15BPP = 5, |
| 48 | ZMBV_FMT_16BPP = 6, |
| 49 | ZMBV_FMT_24BPP = 7, |
| 50 | ZMBV_FMT_32BPP = 8 |
| 51 | }; |
| 52 | |
| 53 | /* |
| 54 | * Decoder context |
| 55 | */ |
| 56 | typedef struct ZmbvContext { |
| 57 | AVCodecContext *avctx; |
| 58 | |
| 59 | int bpp; |
| 60 | unsigned int decomp_size; |
| 61 | uint8_t* decomp_buf; |
| 62 | uint8_t pal[768]; |
| 63 | uint8_t *prev, *cur; |
| 64 | int width, height; |
| 65 | int fmt; |
| 66 | int comp; |
| 67 | int flags; |
| 68 | int stride; |
| 69 | int bw, bh, bx, by; |
| 70 | int decomp_len; |
| 71 | z_stream zstream; |
| 72 | int (*decode_intra)(struct ZmbvContext *c); |
| 73 | int (*decode_xor)(struct ZmbvContext *c); |
| 74 | } ZmbvContext; |
| 75 | |
| 76 | /** |
| 77 | * Decode XOR'ed frame - 8bpp version |
| 78 | */ |
| 79 | |
| 80 | static int zmbv_decode_xor_8(ZmbvContext *c) |
| 81 | { |
| 82 | uint8_t *src = c->decomp_buf; |
| 83 | uint8_t *output, *prev; |
| 84 | int8_t *mvec; |
| 85 | int x, y; |
| 86 | int d, dx, dy, bw2, bh2; |
| 87 | int block; |
| 88 | int i, j; |
| 89 | int mx, my; |
| 90 | |
| 91 | output = c->cur; |
| 92 | prev = c->prev; |
| 93 | |
| 94 | if (c->flags & ZMBV_DELTAPAL) { |
| 95 | for (i = 0; i < 768; i++) |
| 96 | c->pal[i] ^= *src++; |
| 97 | } |
| 98 | |
| 99 | mvec = (int8_t*)src; |
| 100 | src += ((c->bx * c->by * 2 + 3) & ~3); |
| 101 | |
| 102 | block = 0; |
| 103 | for (y = 0; y < c->height; y += c->bh) { |
| 104 | bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y); |
| 105 | for (x = 0; x < c->width; x += c->bw) { |
| 106 | uint8_t *out, *tprev; |
| 107 | |
| 108 | d = mvec[block] & 1; |
| 109 | dx = mvec[block] >> 1; |
| 110 | dy = mvec[block + 1] >> 1; |
| 111 | block += 2; |
| 112 | |
| 113 | bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x); |
| 114 | |
| 115 | /* copy block - motion vectors out of bounds are used to zero blocks */ |
| 116 | out = output + x; |
| 117 | tprev = prev + x + dx + dy * c->width; |
| 118 | mx = x + dx; |
| 119 | my = y + dy; |
| 120 | for (j = 0; j < bh2; j++) { |
| 121 | if (my + j < 0 || my + j >= c->height) { |
| 122 | memset(out, 0, bw2); |
| 123 | } else { |
| 124 | for (i = 0; i < bw2; i++) { |
| 125 | if (mx + i < 0 || mx + i >= c->width) |
| 126 | out[i] = 0; |
| 127 | else |
| 128 | out[i] = tprev[i]; |
| 129 | } |
| 130 | } |
| 131 | out += c->width; |
| 132 | tprev += c->width; |
| 133 | } |
| 134 | |
| 135 | if (d) { /* apply XOR'ed difference */ |
| 136 | out = output + x; |
| 137 | for (j = 0; j < bh2; j++) { |
| 138 | for (i = 0; i < bw2; i++) |
| 139 | out[i] ^= *src++; |
| 140 | out += c->width; |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | output += c->width * c->bh; |
| 145 | prev += c->width * c->bh; |
| 146 | } |
| 147 | if (src - c->decomp_buf != c->decomp_len) |
| 148 | av_log(c->avctx, AV_LOG_ERROR, "Used %"PTRDIFF_SPECIFIER" of %i bytes\n", |
| 149 | src-c->decomp_buf, c->decomp_len); |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Decode XOR'ed frame - 15bpp and 16bpp version |
| 155 | */ |
| 156 | |
| 157 | static int zmbv_decode_xor_16(ZmbvContext *c) |
| 158 | { |
| 159 | uint8_t *src = c->decomp_buf; |
| 160 | uint16_t *output, *prev; |
| 161 | int8_t *mvec; |
| 162 | int x, y; |
| 163 | int d, dx, dy, bw2, bh2; |
| 164 | int block; |
| 165 | int i, j; |
| 166 | int mx, my; |
| 167 | |
| 168 | output = (uint16_t*)c->cur; |
| 169 | prev = (uint16_t*)c->prev; |
| 170 | |
| 171 | mvec = (int8_t*)src; |
| 172 | src += ((c->bx * c->by * 2 + 3) & ~3); |
| 173 | |
| 174 | block = 0; |
| 175 | for (y = 0; y < c->height; y += c->bh) { |
| 176 | bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y); |
| 177 | for (x = 0; x < c->width; x += c->bw) { |
| 178 | uint16_t *out, *tprev; |
| 179 | |
| 180 | d = mvec[block] & 1; |
| 181 | dx = mvec[block] >> 1; |
| 182 | dy = mvec[block + 1] >> 1; |
| 183 | block += 2; |
| 184 | |
| 185 | bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x); |
| 186 | |
| 187 | /* copy block - motion vectors out of bounds are used to zero blocks */ |
| 188 | out = output + x; |
| 189 | tprev = prev + x + dx + dy * c->width; |
| 190 | mx = x + dx; |
| 191 | my = y + dy; |
| 192 | for (j = 0; j < bh2; j++) { |
| 193 | if (my + j < 0 || my + j >= c->height) { |
| 194 | memset(out, 0, bw2 * 2); |
| 195 | } else { |
| 196 | for (i = 0; i < bw2; i++) { |
| 197 | if (mx + i < 0 || mx + i >= c->width) |
| 198 | out[i] = 0; |
| 199 | else |
| 200 | out[i] = tprev[i]; |
| 201 | } |
| 202 | } |
| 203 | out += c->width; |
| 204 | tprev += c->width; |
| 205 | } |
| 206 | |
| 207 | if (d) { /* apply XOR'ed difference */ |
| 208 | out = output + x; |
| 209 | for (j = 0; j < bh2; j++){ |
| 210 | for (i = 0; i < bw2; i++) { |
| 211 | out[i] ^= *((uint16_t*)src); |
| 212 | src += 2; |
| 213 | } |
| 214 | out += c->width; |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | output += c->width * c->bh; |
| 219 | prev += c->width * c->bh; |
| 220 | } |
| 221 | if (src - c->decomp_buf != c->decomp_len) |
| 222 | av_log(c->avctx, AV_LOG_ERROR, "Used %"PTRDIFF_SPECIFIER" of %i bytes\n", |
| 223 | src-c->decomp_buf, c->decomp_len); |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | #ifdef ZMBV_ENABLE_24BPP |
| 228 | /** |
| 229 | * Decode XOR'ed frame - 24bpp version |
| 230 | */ |
| 231 | |
| 232 | static int zmbv_decode_xor_24(ZmbvContext *c) |
| 233 | { |
| 234 | uint8_t *src = c->decomp_buf; |
| 235 | uint8_t *output, *prev; |
| 236 | int8_t *mvec; |
| 237 | int x, y; |
| 238 | int d, dx, dy, bw2, bh2; |
| 239 | int block; |
| 240 | int i, j; |
| 241 | int mx, my; |
| 242 | int stride; |
| 243 | |
| 244 | output = c->cur; |
| 245 | prev = c->prev; |
| 246 | |
| 247 | stride = c->width * 3; |
| 248 | mvec = (int8_t*)src; |
| 249 | src += ((c->bx * c->by * 2 + 3) & ~3); |
| 250 | |
| 251 | block = 0; |
| 252 | for (y = 0; y < c->height; y += c->bh) { |
| 253 | bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y); |
| 254 | for (x = 0; x < c->width; x += c->bw) { |
| 255 | uint8_t *out, *tprev; |
| 256 | |
| 257 | d = mvec[block] & 1; |
| 258 | dx = mvec[block] >> 1; |
| 259 | dy = mvec[block + 1] >> 1; |
| 260 | block += 2; |
| 261 | |
| 262 | bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x); |
| 263 | |
| 264 | /* copy block - motion vectors out of bounds are used to zero blocks */ |
| 265 | out = output + x * 3; |
| 266 | tprev = prev + (x + dx) * 3 + dy * stride; |
| 267 | mx = x + dx; |
| 268 | my = y + dy; |
| 269 | for (j = 0; j < bh2; j++) { |
| 270 | if (my + j < 0 || my + j >= c->height) { |
| 271 | memset(out, 0, bw2 * 3); |
| 272 | } else { |
| 273 | for (i = 0; i < bw2; i++){ |
| 274 | if (mx + i < 0 || mx + i >= c->width) { |
| 275 | out[i * 3 + 0] = 0; |
| 276 | out[i * 3 + 1] = 0; |
| 277 | out[i * 3 + 2] = 0; |
| 278 | } else { |
| 279 | out[i * 3 + 0] = tprev[i * 3 + 0]; |
| 280 | out[i * 3 + 1] = tprev[i * 3 + 1]; |
| 281 | out[i * 3 + 2] = tprev[i * 3 + 2]; |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | out += stride; |
| 286 | tprev += stride; |
| 287 | } |
| 288 | |
| 289 | if (d) { /* apply XOR'ed difference */ |
| 290 | out = output + x * 3; |
| 291 | for (j = 0; j < bh2; j++) { |
| 292 | for (i = 0; i < bw2; i++) { |
| 293 | out[i * 3 + 0] ^= *src++; |
| 294 | out[i * 3 + 1] ^= *src++; |
| 295 | out[i * 3 + 2] ^= *src++; |
| 296 | } |
| 297 | out += stride; |
| 298 | } |
| 299 | } |
| 300 | } |
| 301 | output += stride * c->bh; |
| 302 | prev += stride * c->bh; |
| 303 | } |
| 304 | if (src - c->decomp_buf != c->decomp_len) |
| 305 | av_log(c->avctx, AV_LOG_ERROR, "Used %i of %i bytes\n", |
| 306 | src-c->decomp_buf, c->decomp_len); |
| 307 | return 0; |
| 308 | } |
| 309 | #endif //ZMBV_ENABLE_24BPP |
| 310 | |
| 311 | /** |
| 312 | * Decode XOR'ed frame - 32bpp version |
| 313 | */ |
| 314 | |
| 315 | static int zmbv_decode_xor_32(ZmbvContext *c) |
| 316 | { |
| 317 | uint8_t *src = c->decomp_buf; |
| 318 | uint32_t *output, *prev; |
| 319 | int8_t *mvec; |
| 320 | int x, y; |
| 321 | int d, dx, dy, bw2, bh2; |
| 322 | int block; |
| 323 | int i, j; |
| 324 | int mx, my; |
| 325 | |
| 326 | output = (uint32_t*)c->cur; |
| 327 | prev = (uint32_t*)c->prev; |
| 328 | |
| 329 | mvec = (int8_t*)src; |
| 330 | src += ((c->bx * c->by * 2 + 3) & ~3); |
| 331 | |
| 332 | block = 0; |
| 333 | for (y = 0; y < c->height; y += c->bh) { |
| 334 | bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y); |
| 335 | for (x = 0; x < c->width; x += c->bw) { |
| 336 | uint32_t *out, *tprev; |
| 337 | |
| 338 | d = mvec[block] & 1; |
| 339 | dx = mvec[block] >> 1; |
| 340 | dy = mvec[block + 1] >> 1; |
| 341 | block += 2; |
| 342 | |
| 343 | bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x); |
| 344 | |
| 345 | /* copy block - motion vectors out of bounds are used to zero blocks */ |
| 346 | out = output + x; |
| 347 | tprev = prev + x + dx + dy * c->width; |
| 348 | mx = x + dx; |
| 349 | my = y + dy; |
| 350 | for (j = 0; j < bh2; j++) { |
| 351 | if (my + j < 0 || my + j >= c->height) { |
| 352 | memset(out, 0, bw2 * 4); |
| 353 | } else { |
| 354 | for (i = 0; i < bw2; i++){ |
| 355 | if (mx + i < 0 || mx + i >= c->width) |
| 356 | out[i] = 0; |
| 357 | else |
| 358 | out[i] = tprev[i]; |
| 359 | } |
| 360 | } |
| 361 | out += c->width; |
| 362 | tprev += c->width; |
| 363 | } |
| 364 | |
| 365 | if (d) { /* apply XOR'ed difference */ |
| 366 | out = output + x; |
| 367 | for (j = 0; j < bh2; j++){ |
| 368 | for (i = 0; i < bw2; i++) { |
| 369 | out[i] ^= *((uint32_t *) src); |
| 370 | src += 4; |
| 371 | } |
| 372 | out += c->width; |
| 373 | } |
| 374 | } |
| 375 | } |
| 376 | output += c->width * c->bh; |
| 377 | prev += c->width * c->bh; |
| 378 | } |
| 379 | if (src - c->decomp_buf != c->decomp_len) |
| 380 | av_log(c->avctx, AV_LOG_ERROR, "Used %"PTRDIFF_SPECIFIER" of %i bytes\n", |
| 381 | src-c->decomp_buf, c->decomp_len); |
| 382 | return 0; |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * Decode intraframe |
| 387 | */ |
| 388 | static int zmbv_decode_intra(ZmbvContext *c) |
| 389 | { |
| 390 | uint8_t *src = c->decomp_buf; |
| 391 | |
| 392 | /* make the palette available on the way out */ |
| 393 | if (c->fmt == ZMBV_FMT_8BPP) { |
| 394 | memcpy(c->pal, src, 768); |
| 395 | src += 768; |
| 396 | } |
| 397 | |
| 398 | memcpy(c->cur, src, c->width * c->height * (c->bpp / 8)); |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) |
| 403 | { |
| 404 | AVFrame *frame = data; |
| 405 | const uint8_t *buf = avpkt->data; |
| 406 | int buf_size = avpkt->size; |
| 407 | ZmbvContext * const c = avctx->priv_data; |
| 408 | int zret = Z_OK; // Zlib return code |
| 409 | int len = buf_size; |
| 410 | int hi_ver, lo_ver, ret; |
| 411 | |
| 412 | /* parse header */ |
| 413 | c->flags = buf[0]; |
| 414 | buf++; len--; |
| 415 | if (c->flags & ZMBV_KEYFRAME) { |
| 416 | void *decode_intra = NULL; |
| 417 | c->decode_intra= NULL; |
| 418 | hi_ver = buf[0]; |
| 419 | lo_ver = buf[1]; |
| 420 | c->comp = buf[2]; |
| 421 | c->fmt = buf[3]; |
| 422 | c->bw = buf[4]; |
| 423 | c->bh = buf[5]; |
| 424 | c->decode_intra = NULL; |
| 425 | c->decode_xor = NULL; |
| 426 | |
| 427 | buf += 6; |
| 428 | len -= 6; |
| 429 | av_log(avctx, AV_LOG_DEBUG, |
| 430 | "Flags=%X ver=%i.%i comp=%i fmt=%i blk=%ix%i\n", |
| 431 | c->flags,hi_ver,lo_ver,c->comp,c->fmt,c->bw,c->bh); |
| 432 | if (hi_ver != 0 || lo_ver != 1) { |
| 433 | avpriv_request_sample(avctx, "Version %i.%i", hi_ver, lo_ver); |
| 434 | return AVERROR_PATCHWELCOME; |
| 435 | } |
| 436 | if (c->bw == 0 || c->bh == 0) { |
| 437 | avpriv_request_sample(avctx, "Block size %ix%i", c->bw, c->bh); |
| 438 | return AVERROR_PATCHWELCOME; |
| 439 | } |
| 440 | if (c->comp != 0 && c->comp != 1) { |
| 441 | avpriv_request_sample(avctx, "Compression type %i", c->comp); |
| 442 | return AVERROR_PATCHWELCOME; |
| 443 | } |
| 444 | |
| 445 | switch (c->fmt) { |
| 446 | case ZMBV_FMT_8BPP: |
| 447 | c->bpp = 8; |
| 448 | decode_intra = zmbv_decode_intra; |
| 449 | c->decode_xor = zmbv_decode_xor_8; |
| 450 | avctx->pix_fmt = AV_PIX_FMT_PAL8; |
| 451 | c->stride = c->width; |
| 452 | break; |
| 453 | case ZMBV_FMT_15BPP: |
| 454 | case ZMBV_FMT_16BPP: |
| 455 | c->bpp = 16; |
| 456 | decode_intra = zmbv_decode_intra; |
| 457 | c->decode_xor = zmbv_decode_xor_16; |
| 458 | if (c->fmt == ZMBV_FMT_15BPP) |
| 459 | avctx->pix_fmt = AV_PIX_FMT_RGB555LE; |
| 460 | else |
| 461 | avctx->pix_fmt = AV_PIX_FMT_RGB565LE; |
| 462 | c->stride = c->width * 2; |
| 463 | break; |
| 464 | #ifdef ZMBV_ENABLE_24BPP |
| 465 | case ZMBV_FMT_24BPP: |
| 466 | c->bpp = 24; |
| 467 | decode_intra = zmbv_decode_intra; |
| 468 | c->decode_xor = zmbv_decode_xor_24; |
| 469 | avctx->pix_fmt = AV_PIX_FMT_RGB24; |
| 470 | c->stride = c->width * 3; |
| 471 | break; |
| 472 | #endif //ZMBV_ENABLE_24BPP |
| 473 | case ZMBV_FMT_32BPP: |
| 474 | c->bpp = 32; |
| 475 | decode_intra = zmbv_decode_intra; |
| 476 | c->decode_xor = zmbv_decode_xor_32; |
| 477 | avctx->pix_fmt = AV_PIX_FMT_BGR0; |
| 478 | c->stride = c->width * 4; |
| 479 | break; |
| 480 | default: |
| 481 | c->decode_xor = NULL; |
| 482 | avpriv_request_sample(avctx, "Format %i", c->fmt); |
| 483 | return AVERROR_PATCHWELCOME; |
| 484 | } |
| 485 | |
| 486 | zret = inflateReset(&c->zstream); |
| 487 | if (zret != Z_OK) { |
| 488 | av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); |
| 489 | return AVERROR_UNKNOWN; |
| 490 | } |
| 491 | |
| 492 | c->cur = av_realloc_f(c->cur, avctx->width * avctx->height, (c->bpp / 8)); |
| 493 | c->prev = av_realloc_f(c->prev, avctx->width * avctx->height, (c->bpp / 8)); |
| 494 | c->bx = (c->width + c->bw - 1) / c->bw; |
| 495 | c->by = (c->height+ c->bh - 1) / c->bh; |
| 496 | if (!c->cur || !c->prev) |
| 497 | return AVERROR(ENOMEM); |
| 498 | memset(c->cur, 0, avctx->width * avctx->height * (c->bpp / 8)); |
| 499 | memset(c->prev, 0, avctx->width * avctx->height * (c->bpp / 8)); |
| 500 | c->decode_intra= decode_intra; |
| 501 | } |
| 502 | |
| 503 | if (!c->decode_intra) { |
| 504 | av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n"); |
| 505 | return AVERROR_INVALIDDATA; |
| 506 | } |
| 507 | |
| 508 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 509 | return ret; |
| 510 | |
| 511 | if (c->comp == 0) { //Uncompressed data |
| 512 | if (c->decomp_size < len) { |
| 513 | av_log(avctx, AV_LOG_ERROR, "Buffer too small\n"); |
| 514 | return AVERROR_INVALIDDATA; |
| 515 | } |
| 516 | memcpy(c->decomp_buf, buf, len); |
| 517 | } else { // ZLIB-compressed data |
| 518 | c->zstream.total_in = c->zstream.total_out = 0; |
| 519 | c->zstream.next_in = (uint8_t*)buf; |
| 520 | c->zstream.avail_in = len; |
| 521 | c->zstream.next_out = c->decomp_buf; |
| 522 | c->zstream.avail_out = c->decomp_size; |
| 523 | zret = inflate(&c->zstream, Z_SYNC_FLUSH); |
| 524 | if (zret != Z_OK && zret != Z_STREAM_END) { |
| 525 | av_log(avctx, AV_LOG_ERROR, "inflate error %d\n", zret); |
| 526 | return AVERROR_INVALIDDATA; |
| 527 | } |
| 528 | c->decomp_len = c->zstream.total_out; |
| 529 | } |
| 530 | if (c->flags & ZMBV_KEYFRAME) { |
| 531 | frame->key_frame = 1; |
| 532 | frame->pict_type = AV_PICTURE_TYPE_I; |
| 533 | c->decode_intra(c); |
| 534 | } else { |
| 535 | frame->key_frame = 0; |
| 536 | frame->pict_type = AV_PICTURE_TYPE_P; |
| 537 | if (c->decomp_len) |
| 538 | c->decode_xor(c); |
| 539 | } |
| 540 | |
| 541 | /* update frames */ |
| 542 | { |
| 543 | uint8_t *out, *src; |
| 544 | int j; |
| 545 | |
| 546 | out = frame->data[0]; |
| 547 | src = c->cur; |
| 548 | switch (c->fmt) { |
| 549 | case ZMBV_FMT_8BPP: |
| 550 | for (j = 0; j < 256; j++) |
| 551 | AV_WN32(&frame->data[1][j * 4], 0xFFU << 24 | AV_RB24(&c->pal[j * 3])); |
| 552 | case ZMBV_FMT_15BPP: |
| 553 | case ZMBV_FMT_16BPP: |
| 554 | #ifdef ZMBV_ENABLE_24BPP |
| 555 | case ZMBV_FMT_24BPP: |
| 556 | #endif |
| 557 | case ZMBV_FMT_32BPP: |
| 558 | av_image_copy_plane(out, frame->linesize[0], src, c->stride, |
| 559 | c->stride, c->height); |
| 560 | break; |
| 561 | default: |
| 562 | av_log(avctx, AV_LOG_ERROR, "Cannot handle format %i\n", c->fmt); |
| 563 | } |
| 564 | FFSWAP(uint8_t *, c->cur, c->prev); |
| 565 | } |
| 566 | *got_frame = 1; |
| 567 | |
| 568 | /* always report that the buffer was completely consumed */ |
| 569 | return buf_size; |
| 570 | } |
| 571 | |
| 572 | static av_cold int decode_init(AVCodecContext *avctx) |
| 573 | { |
| 574 | ZmbvContext * const c = avctx->priv_data; |
| 575 | int zret; // Zlib return code |
| 576 | |
| 577 | c->avctx = avctx; |
| 578 | |
| 579 | c->width = avctx->width; |
| 580 | c->height = avctx->height; |
| 581 | |
| 582 | c->bpp = avctx->bits_per_coded_sample; |
| 583 | |
| 584 | // Needed if zlib unused or init aborted before inflateInit |
| 585 | memset(&c->zstream, 0, sizeof(z_stream)); |
| 586 | |
| 587 | c->decomp_size = (avctx->width + 255) * 4 * (avctx->height + 64); |
| 588 | |
| 589 | /* Allocate decompression buffer */ |
| 590 | if (c->decomp_size) { |
| 591 | if (!(c->decomp_buf = av_mallocz(c->decomp_size))) { |
| 592 | av_log(avctx, AV_LOG_ERROR, |
| 593 | "Can't allocate decompression buffer.\n"); |
| 594 | return AVERROR(ENOMEM); |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | c->zstream.zalloc = Z_NULL; |
| 599 | c->zstream.zfree = Z_NULL; |
| 600 | c->zstream.opaque = Z_NULL; |
| 601 | zret = inflateInit(&c->zstream); |
| 602 | if (zret != Z_OK) { |
| 603 | av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret); |
| 604 | return AVERROR_UNKNOWN; |
| 605 | } |
| 606 | |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | static av_cold int decode_end(AVCodecContext *avctx) |
| 611 | { |
| 612 | ZmbvContext * const c = avctx->priv_data; |
| 613 | |
| 614 | av_freep(&c->decomp_buf); |
| 615 | |
| 616 | inflateEnd(&c->zstream); |
| 617 | av_freep(&c->cur); |
| 618 | av_freep(&c->prev); |
| 619 | |
| 620 | return 0; |
| 621 | } |
| 622 | |
| 623 | AVCodec ff_zmbv_decoder = { |
| 624 | .name = "zmbv", |
| 625 | .long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"), |
| 626 | .type = AVMEDIA_TYPE_VIDEO, |
| 627 | .id = AV_CODEC_ID_ZMBV, |
| 628 | .priv_data_size = sizeof(ZmbvContext), |
| 629 | .init = decode_init, |
| 630 | .close = decode_end, |
| 631 | .decode = decode_frame, |
| 632 | .capabilities = CODEC_CAP_DR1, |
| 633 | }; |