| 1 | /* |
| 2 | * Flash Screen Video decoder |
| 3 | * Copyright (C) 2004 Alex Beregszaszi |
| 4 | * Copyright (C) 2006 Benjamin Larsson |
| 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 | /** |
| 24 | * @file |
| 25 | * Flash Screen Video decoder |
| 26 | * @author Alex Beregszaszi |
| 27 | * @author Benjamin Larsson |
| 28 | * @author Daniel Verkamp |
| 29 | * @author Konstantin Shishkov |
| 30 | * |
| 31 | * A description of the bitstream format for Flash Screen Video version 1/2 |
| 32 | * is part of the SWF File Format Specification (version 10), which can be |
| 33 | * downloaded from http://www.adobe.com/devnet/swf.html. |
| 34 | */ |
| 35 | |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
| 38 | #include <zlib.h> |
| 39 | |
| 40 | #include "libavutil/intreadwrite.h" |
| 41 | #include "avcodec.h" |
| 42 | #include "bytestream.h" |
| 43 | #include "get_bits.h" |
| 44 | #include "internal.h" |
| 45 | |
| 46 | typedef struct BlockInfo { |
| 47 | uint8_t *pos; |
| 48 | int size; |
| 49 | } BlockInfo; |
| 50 | |
| 51 | typedef struct FlashSVContext { |
| 52 | AVCodecContext *avctx; |
| 53 | AVFrame *frame; |
| 54 | int image_width, image_height; |
| 55 | int block_width, block_height; |
| 56 | uint8_t *tmpblock; |
| 57 | int block_size; |
| 58 | z_stream zstream; |
| 59 | int ver; |
| 60 | const uint32_t *pal; |
| 61 | int is_keyframe; |
| 62 | uint8_t *keyframedata; |
| 63 | uint8_t *keyframe; |
| 64 | BlockInfo *blocks; |
| 65 | uint8_t *deflate_block; |
| 66 | int deflate_block_size; |
| 67 | int color_depth; |
| 68 | int zlibprime_curr, zlibprime_prev; |
| 69 | int diff_start, diff_height; |
| 70 | } FlashSVContext; |
| 71 | |
| 72 | static int decode_hybrid(const uint8_t *sptr, const uint8_t *sptr_end, uint8_t *dptr, int dx, int dy, |
| 73 | int h, int w, int stride, const uint32_t *pal) |
| 74 | { |
| 75 | int x, y; |
| 76 | const uint8_t *orig_src = sptr; |
| 77 | |
| 78 | for (y = dx + h; y > dx; y--) { |
| 79 | uint8_t *dst = dptr + (y * stride) + dy * 3; |
| 80 | for (x = 0; x < w; x++) { |
| 81 | if (sptr >= sptr_end) |
| 82 | return AVERROR_INVALIDDATA; |
| 83 | if (*sptr & 0x80) { |
| 84 | /* 15-bit color */ |
| 85 | unsigned c = AV_RB16(sptr) & ~0x8000; |
| 86 | unsigned b = c & 0x1F; |
| 87 | unsigned g = (c >> 5) & 0x1F; |
| 88 | unsigned r = c >> 10; |
| 89 | /* 000aaabb -> aaabbaaa */ |
| 90 | *dst++ = (b << 3) | (b >> 2); |
| 91 | *dst++ = (g << 3) | (g >> 2); |
| 92 | *dst++ = (r << 3) | (r >> 2); |
| 93 | sptr += 2; |
| 94 | } else { |
| 95 | /* palette index */ |
| 96 | uint32_t c = pal[*sptr++]; |
| 97 | bytestream_put_le24(&dst, c); |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | return sptr - orig_src; |
| 102 | } |
| 103 | |
| 104 | static av_cold int flashsv_decode_end(AVCodecContext *avctx) |
| 105 | { |
| 106 | FlashSVContext *s = avctx->priv_data; |
| 107 | inflateEnd(&s->zstream); |
| 108 | /* release the frame if needed */ |
| 109 | av_frame_free(&s->frame); |
| 110 | |
| 111 | /* free the tmpblock */ |
| 112 | av_freep(&s->tmpblock); |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static av_cold int flashsv_decode_init(AVCodecContext *avctx) |
| 118 | { |
| 119 | FlashSVContext *s = avctx->priv_data; |
| 120 | int zret; // Zlib return code |
| 121 | |
| 122 | s->avctx = avctx; |
| 123 | s->zstream.zalloc = Z_NULL; |
| 124 | s->zstream.zfree = Z_NULL; |
| 125 | s->zstream.opaque = Z_NULL; |
| 126 | zret = inflateInit(&s->zstream); |
| 127 | if (zret != Z_OK) { |
| 128 | av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret); |
| 129 | return 1; |
| 130 | } |
| 131 | avctx->pix_fmt = AV_PIX_FMT_BGR24; |
| 132 | |
| 133 | s->frame = av_frame_alloc(); |
| 134 | if (!s->frame) { |
| 135 | flashsv_decode_end(avctx); |
| 136 | return AVERROR(ENOMEM); |
| 137 | } |
| 138 | |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | static int flashsv2_prime(FlashSVContext *s, uint8_t *src, int size) |
| 143 | { |
| 144 | z_stream zs; |
| 145 | int zret; // Zlib return code |
| 146 | |
| 147 | if (!src) |
| 148 | return AVERROR_INVALIDDATA; |
| 149 | |
| 150 | zs.zalloc = NULL; |
| 151 | zs.zfree = NULL; |
| 152 | zs.opaque = NULL; |
| 153 | |
| 154 | s->zstream.next_in = src; |
| 155 | s->zstream.avail_in = size; |
| 156 | s->zstream.next_out = s->tmpblock; |
| 157 | s->zstream.avail_out = s->block_size * 3; |
| 158 | inflate(&s->zstream, Z_SYNC_FLUSH); |
| 159 | |
| 160 | if (deflateInit(&zs, 0) != Z_OK) |
| 161 | return -1; |
| 162 | zs.next_in = s->tmpblock; |
| 163 | zs.avail_in = s->block_size * 3 - s->zstream.avail_out; |
| 164 | zs.next_out = s->deflate_block; |
| 165 | zs.avail_out = s->deflate_block_size; |
| 166 | deflate(&zs, Z_SYNC_FLUSH); |
| 167 | deflateEnd(&zs); |
| 168 | |
| 169 | if ((zret = inflateReset(&s->zstream)) != Z_OK) { |
| 170 | av_log(s->avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); |
| 171 | return AVERROR_UNKNOWN; |
| 172 | } |
| 173 | |
| 174 | s->zstream.next_in = s->deflate_block; |
| 175 | s->zstream.avail_in = s->deflate_block_size - zs.avail_out; |
| 176 | s->zstream.next_out = s->tmpblock; |
| 177 | s->zstream.avail_out = s->block_size * 3; |
| 178 | inflate(&s->zstream, Z_SYNC_FLUSH); |
| 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | static int flashsv_decode_block(AVCodecContext *avctx, AVPacket *avpkt, |
| 184 | GetBitContext *gb, int block_size, |
| 185 | int width, int height, int x_pos, int y_pos, |
| 186 | int blk_idx) |
| 187 | { |
| 188 | struct FlashSVContext *s = avctx->priv_data; |
| 189 | uint8_t *line = s->tmpblock; |
| 190 | int k; |
| 191 | int ret = inflateReset(&s->zstream); |
| 192 | if (ret != Z_OK) { |
| 193 | av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret); |
| 194 | return AVERROR_UNKNOWN; |
| 195 | } |
| 196 | if (s->zlibprime_curr || s->zlibprime_prev) { |
| 197 | ret = flashsv2_prime(s, |
| 198 | s->blocks[blk_idx].pos, |
| 199 | s->blocks[blk_idx].size); |
| 200 | if (ret < 0) |
| 201 | return ret; |
| 202 | } |
| 203 | s->zstream.next_in = avpkt->data + get_bits_count(gb) / 8; |
| 204 | s->zstream.avail_in = block_size; |
| 205 | s->zstream.next_out = s->tmpblock; |
| 206 | s->zstream.avail_out = s->block_size * 3; |
| 207 | ret = inflate(&s->zstream, Z_FINISH); |
| 208 | if (ret == Z_DATA_ERROR) { |
| 209 | av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n"); |
| 210 | inflateSync(&s->zstream); |
| 211 | ret = inflate(&s->zstream, Z_FINISH); |
| 212 | } |
| 213 | |
| 214 | if (ret != Z_OK && ret != Z_STREAM_END) { |
| 215 | //return -1; |
| 216 | } |
| 217 | |
| 218 | if (s->is_keyframe) { |
| 219 | s->blocks[blk_idx].pos = s->keyframedata + (get_bits_count(gb) / 8); |
| 220 | s->blocks[blk_idx].size = block_size; |
| 221 | } |
| 222 | |
| 223 | y_pos += s->diff_start; |
| 224 | |
| 225 | if (!s->color_depth) { |
| 226 | /* Flash Screen Video stores the image upside down, so copy |
| 227 | * lines to destination in reverse order. */ |
| 228 | for (k = 1; k <= s->diff_height; k++) { |
| 229 | memcpy(s->frame->data[0] + x_pos * 3 + |
| 230 | (s->image_height - y_pos - k) * s->frame->linesize[0], |
| 231 | line, width * 3); |
| 232 | /* advance source pointer to next line */ |
| 233 | line += width * 3; |
| 234 | } |
| 235 | } else { |
| 236 | /* hybrid 15-bit/palette mode */ |
| 237 | ret = decode_hybrid(s->tmpblock, s->zstream.next_out, |
| 238 | s->frame->data[0], |
| 239 | s->image_height - (y_pos + 1 + s->diff_height), |
| 240 | x_pos, s->diff_height, width, |
| 241 | s->frame->linesize[0], s->pal); |
| 242 | if (ret < 0) { |
| 243 | av_log(avctx, AV_LOG_ERROR, "decode_hybrid failed\n"); |
| 244 | return ret; |
| 245 | } |
| 246 | } |
| 247 | skip_bits_long(gb, 8 * block_size); /* skip the consumed bits */ |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static int calc_deflate_block_size(int tmpblock_size) |
| 252 | { |
| 253 | z_stream zstream; |
| 254 | int size; |
| 255 | |
| 256 | zstream.zalloc = Z_NULL; |
| 257 | zstream.zfree = Z_NULL; |
| 258 | zstream.opaque = Z_NULL; |
| 259 | if (deflateInit(&zstream, 0) != Z_OK) |
| 260 | return -1; |
| 261 | size = deflateBound(&zstream, tmpblock_size); |
| 262 | deflateEnd(&zstream); |
| 263 | |
| 264 | return size; |
| 265 | } |
| 266 | |
| 267 | static int flashsv_decode_frame(AVCodecContext *avctx, void *data, |
| 268 | int *got_frame, AVPacket *avpkt) |
| 269 | { |
| 270 | int buf_size = avpkt->size; |
| 271 | FlashSVContext *s = avctx->priv_data; |
| 272 | int h_blocks, v_blocks, h_part, v_part, i, j, ret; |
| 273 | GetBitContext gb; |
| 274 | int last_blockwidth = s->block_width; |
| 275 | int last_blockheight= s->block_height; |
| 276 | |
| 277 | /* no supplementary picture */ |
| 278 | if (buf_size == 0) |
| 279 | return 0; |
| 280 | if (buf_size < 4) |
| 281 | return -1; |
| 282 | |
| 283 | if ((ret = init_get_bits8(&gb, avpkt->data, buf_size)) < 0) |
| 284 | return ret; |
| 285 | |
| 286 | /* start to parse the bitstream */ |
| 287 | s->block_width = 16 * (get_bits(&gb, 4) + 1); |
| 288 | s->image_width = get_bits(&gb, 12); |
| 289 | s->block_height = 16 * (get_bits(&gb, 4) + 1); |
| 290 | s->image_height = get_bits(&gb, 12); |
| 291 | |
| 292 | if ( last_blockwidth != s->block_width |
| 293 | || last_blockheight!= s->block_height) |
| 294 | av_freep(&s->blocks); |
| 295 | |
| 296 | if (s->ver == 2) { |
| 297 | skip_bits(&gb, 6); |
| 298 | if (get_bits1(&gb)) { |
| 299 | avpriv_request_sample(avctx, "iframe"); |
| 300 | return AVERROR_PATCHWELCOME; |
| 301 | } |
| 302 | if (get_bits1(&gb)) { |
| 303 | avpriv_request_sample(avctx, "Custom palette"); |
| 304 | return AVERROR_PATCHWELCOME; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | /* calculate number of blocks and size of border (partial) blocks */ |
| 309 | h_blocks = s->image_width / s->block_width; |
| 310 | h_part = s->image_width % s->block_width; |
| 311 | v_blocks = s->image_height / s->block_height; |
| 312 | v_part = s->image_height % s->block_height; |
| 313 | |
| 314 | /* the block size could change between frames, make sure the buffer |
| 315 | * is large enough, if not, get a larger one */ |
| 316 | if (s->block_size < s->block_width * s->block_height) { |
| 317 | int tmpblock_size = 3 * s->block_width * s->block_height, err; |
| 318 | |
| 319 | if ((err = av_reallocp(&s->tmpblock, tmpblock_size)) < 0) { |
| 320 | s->block_size = 0; |
| 321 | av_log(avctx, AV_LOG_ERROR, |
| 322 | "Cannot allocate decompression buffer.\n"); |
| 323 | return err; |
| 324 | } |
| 325 | if (s->ver == 2) { |
| 326 | s->deflate_block_size = calc_deflate_block_size(tmpblock_size); |
| 327 | if (s->deflate_block_size <= 0) { |
| 328 | av_log(avctx, AV_LOG_ERROR, |
| 329 | "Cannot determine deflate buffer size.\n"); |
| 330 | return -1; |
| 331 | } |
| 332 | if ((err = av_reallocp(&s->deflate_block, s->deflate_block_size)) < 0) { |
| 333 | s->block_size = 0; |
| 334 | av_log(avctx, AV_LOG_ERROR, "Cannot allocate deflate buffer.\n"); |
| 335 | return err; |
| 336 | } |
| 337 | } |
| 338 | } |
| 339 | s->block_size = s->block_width * s->block_height; |
| 340 | |
| 341 | /* initialize the image size once */ |
| 342 | if (avctx->width == 0 && avctx->height == 0) { |
| 343 | if ((ret = ff_set_dimensions(avctx, s->image_width, s->image_height)) < 0) |
| 344 | return ret; |
| 345 | } |
| 346 | |
| 347 | /* check for changes of image width and image height */ |
| 348 | if (avctx->width != s->image_width || avctx->height != s->image_height) { |
| 349 | av_log(avctx, AV_LOG_ERROR, |
| 350 | "Frame width or height differs from first frame!\n"); |
| 351 | av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d vs ch = %d, cv = %d\n", |
| 352 | avctx->height, avctx->width, s->image_height, s->image_width); |
| 353 | return AVERROR_INVALIDDATA; |
| 354 | } |
| 355 | |
| 356 | /* we care for keyframes only in Screen Video v2 */ |
| 357 | s->is_keyframe = (avpkt->flags & AV_PKT_FLAG_KEY) && (s->ver == 2); |
| 358 | if (s->is_keyframe) { |
| 359 | int err; |
| 360 | if ((err = av_reallocp(&s->keyframedata, avpkt->size)) < 0) |
| 361 | return err; |
| 362 | memcpy(s->keyframedata, avpkt->data, avpkt->size); |
| 363 | } |
| 364 | if(s->ver == 2 && !s->blocks) |
| 365 | s->blocks = av_mallocz((v_blocks + !!v_part) * (h_blocks + !!h_part) * |
| 366 | sizeof(s->blocks[0])); |
| 367 | |
| 368 | av_dlog(avctx, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n", |
| 369 | s->image_width, s->image_height, s->block_width, s->block_height, |
| 370 | h_blocks, v_blocks, h_part, v_part); |
| 371 | |
| 372 | if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) |
| 373 | return ret; |
| 374 | |
| 375 | /* loop over all block columns */ |
| 376 | for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) { |
| 377 | |
| 378 | int y_pos = j * s->block_height; // vertical position in frame |
| 379 | int cur_blk_height = (j < v_blocks) ? s->block_height : v_part; |
| 380 | |
| 381 | /* loop over all block rows */ |
| 382 | for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) { |
| 383 | int x_pos = i * s->block_width; // horizontal position in frame |
| 384 | int cur_blk_width = (i < h_blocks) ? s->block_width : h_part; |
| 385 | int has_diff = 0; |
| 386 | |
| 387 | /* get the size of the compressed zlib chunk */ |
| 388 | int size = get_bits(&gb, 16); |
| 389 | |
| 390 | s->color_depth = 0; |
| 391 | s->zlibprime_curr = 0; |
| 392 | s->zlibprime_prev = 0; |
| 393 | s->diff_start = 0; |
| 394 | s->diff_height = cur_blk_height; |
| 395 | |
| 396 | if (8 * size > get_bits_left(&gb)) { |
| 397 | av_frame_unref(s->frame); |
| 398 | return AVERROR_INVALIDDATA; |
| 399 | } |
| 400 | |
| 401 | if (s->ver == 2 && size) { |
| 402 | skip_bits(&gb, 3); |
| 403 | s->color_depth = get_bits(&gb, 2); |
| 404 | has_diff = get_bits1(&gb); |
| 405 | s->zlibprime_curr = get_bits1(&gb); |
| 406 | s->zlibprime_prev = get_bits1(&gb); |
| 407 | |
| 408 | if (s->color_depth != 0 && s->color_depth != 2) { |
| 409 | av_log(avctx, AV_LOG_ERROR, |
| 410 | "%dx%d invalid color depth %d\n", |
| 411 | i, j, s->color_depth); |
| 412 | return AVERROR_INVALIDDATA; |
| 413 | } |
| 414 | |
| 415 | if (has_diff) { |
| 416 | if (!s->keyframe) { |
| 417 | av_log(avctx, AV_LOG_ERROR, |
| 418 | "Inter frame without keyframe\n"); |
| 419 | return AVERROR_INVALIDDATA; |
| 420 | } |
| 421 | s->diff_start = get_bits(&gb, 8); |
| 422 | s->diff_height = get_bits(&gb, 8); |
| 423 | if (s->diff_start + s->diff_height > cur_blk_height) { |
| 424 | av_log(avctx, AV_LOG_ERROR, |
| 425 | "Block parameters invalid: %d + %d > %d\n", |
| 426 | s->diff_start, s->diff_height, cur_blk_height); |
| 427 | return AVERROR_INVALIDDATA; |
| 428 | } |
| 429 | av_log(avctx, AV_LOG_DEBUG, |
| 430 | "%dx%d diff start %d height %d\n", |
| 431 | i, j, s->diff_start, s->diff_height); |
| 432 | size -= 2; |
| 433 | } |
| 434 | |
| 435 | if (s->zlibprime_prev) |
| 436 | av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_prev\n", i, j); |
| 437 | |
| 438 | if (s->zlibprime_curr) { |
| 439 | int col = get_bits(&gb, 8); |
| 440 | int row = get_bits(&gb, 8); |
| 441 | av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_curr %dx%d\n", |
| 442 | i, j, col, row); |
| 443 | size -= 2; |
| 444 | avpriv_request_sample(avctx, "zlibprime_curr"); |
| 445 | return AVERROR_PATCHWELCOME; |
| 446 | } |
| 447 | if (!s->blocks && (s->zlibprime_curr || s->zlibprime_prev)) { |
| 448 | av_log(avctx, AV_LOG_ERROR, |
| 449 | "no data available for zlib priming\n"); |
| 450 | return AVERROR_INVALIDDATA; |
| 451 | } |
| 452 | size--; // account for flags byte |
| 453 | } |
| 454 | |
| 455 | if (has_diff) { |
| 456 | int k; |
| 457 | int off = (s->image_height - y_pos - 1) * s->frame->linesize[0]; |
| 458 | |
| 459 | for (k = 0; k < cur_blk_height; k++) { |
| 460 | int x = off - k * s->frame->linesize[0] + x_pos * 3; |
| 461 | memcpy(s->frame->data[0] + x, s->keyframe + x, |
| 462 | cur_blk_width * 3); |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | /* skip unchanged blocks, which have size 0 */ |
| 467 | if (size) { |
| 468 | if (flashsv_decode_block(avctx, avpkt, &gb, size, |
| 469 | cur_blk_width, cur_blk_height, |
| 470 | x_pos, y_pos, |
| 471 | i + j * (h_blocks + !!h_part))) |
| 472 | av_log(avctx, AV_LOG_ERROR, |
| 473 | "error in decompression of block %dx%d\n", i, j); |
| 474 | } |
| 475 | } |
| 476 | } |
| 477 | if (s->is_keyframe && s->ver == 2) { |
| 478 | if (!s->keyframe) { |
| 479 | s->keyframe = av_malloc(s->frame->linesize[0] * avctx->height); |
| 480 | if (!s->keyframe) { |
| 481 | av_log(avctx, AV_LOG_ERROR, "Cannot allocate image data\n"); |
| 482 | return AVERROR(ENOMEM); |
| 483 | } |
| 484 | } |
| 485 | memcpy(s->keyframe, s->frame->data[0], |
| 486 | s->frame->linesize[0] * avctx->height); |
| 487 | } |
| 488 | |
| 489 | if ((ret = av_frame_ref(data, s->frame)) < 0) |
| 490 | return ret; |
| 491 | |
| 492 | *got_frame = 1; |
| 493 | |
| 494 | if ((get_bits_count(&gb) / 8) != buf_size) |
| 495 | av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n", |
| 496 | buf_size, (get_bits_count(&gb) / 8)); |
| 497 | |
| 498 | /* report that the buffer was completely consumed */ |
| 499 | return buf_size; |
| 500 | } |
| 501 | |
| 502 | #if CONFIG_FLASHSV_DECODER |
| 503 | AVCodec ff_flashsv_decoder = { |
| 504 | .name = "flashsv", |
| 505 | .long_name = NULL_IF_CONFIG_SMALL("Flash Screen Video v1"), |
| 506 | .type = AVMEDIA_TYPE_VIDEO, |
| 507 | .id = AV_CODEC_ID_FLASHSV, |
| 508 | .priv_data_size = sizeof(FlashSVContext), |
| 509 | .init = flashsv_decode_init, |
| 510 | .close = flashsv_decode_end, |
| 511 | .decode = flashsv_decode_frame, |
| 512 | .capabilities = CODEC_CAP_DR1, |
| 513 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE }, |
| 514 | }; |
| 515 | #endif /* CONFIG_FLASHSV_DECODER */ |
| 516 | |
| 517 | #if CONFIG_FLASHSV2_DECODER |
| 518 | static const uint32_t ff_flashsv2_default_palette[128] = { |
| 519 | 0x000000, 0x333333, 0x666666, 0x999999, 0xCCCCCC, 0xFFFFFF, |
| 520 | 0x330000, 0x660000, 0x990000, 0xCC0000, 0xFF0000, 0x003300, |
| 521 | 0x006600, 0x009900, 0x00CC00, 0x00FF00, 0x000033, 0x000066, |
| 522 | 0x000099, 0x0000CC, 0x0000FF, 0x333300, 0x666600, 0x999900, |
| 523 | 0xCCCC00, 0xFFFF00, 0x003333, 0x006666, 0x009999, 0x00CCCC, |
| 524 | 0x00FFFF, 0x330033, 0x660066, 0x990099, 0xCC00CC, 0xFF00FF, |
| 525 | 0xFFFF33, 0xFFFF66, 0xFFFF99, 0xFFFFCC, 0xFF33FF, 0xFF66FF, |
| 526 | 0xFF99FF, 0xFFCCFF, 0x33FFFF, 0x66FFFF, 0x99FFFF, 0xCCFFFF, |
| 527 | 0xCCCC33, 0xCCCC66, 0xCCCC99, 0xCCCCFF, 0xCC33CC, 0xCC66CC, |
| 528 | 0xCC99CC, 0xCCFFCC, 0x33CCCC, 0x66CCCC, 0x99CCCC, 0xFFCCCC, |
| 529 | 0x999933, 0x999966, 0x9999CC, 0x9999FF, 0x993399, 0x996699, |
| 530 | 0x99CC99, 0x99FF99, 0x339999, 0x669999, 0xCC9999, 0xFF9999, |
| 531 | 0x666633, 0x666699, 0x6666CC, 0x6666FF, 0x663366, 0x669966, |
| 532 | 0x66CC66, 0x66FF66, 0x336666, 0x996666, 0xCC6666, 0xFF6666, |
| 533 | 0x333366, 0x333399, 0x3333CC, 0x3333FF, 0x336633, 0x339933, |
| 534 | 0x33CC33, 0x33FF33, 0x663333, 0x993333, 0xCC3333, 0xFF3333, |
| 535 | 0x003366, 0x336600, 0x660033, 0x006633, 0x330066, 0x663300, |
| 536 | 0x336699, 0x669933, 0x993366, 0x339966, 0x663399, 0x996633, |
| 537 | 0x6699CC, 0x99CC66, 0xCC6699, 0x66CC99, 0x9966CC, 0xCC9966, |
| 538 | 0x99CCFF, 0xCCFF99, 0xFF99CC, 0x99FFCC, 0xCC99FF, 0xFFCC99, |
| 539 | 0x111111, 0x222222, 0x444444, 0x555555, 0xAAAAAA, 0xBBBBBB, |
| 540 | 0xDDDDDD, 0xEEEEEE |
| 541 | }; |
| 542 | |
| 543 | static av_cold int flashsv2_decode_init(AVCodecContext *avctx) |
| 544 | { |
| 545 | FlashSVContext *s = avctx->priv_data; |
| 546 | flashsv_decode_init(avctx); |
| 547 | s->pal = ff_flashsv2_default_palette; |
| 548 | s->ver = 2; |
| 549 | |
| 550 | return 0; |
| 551 | } |
| 552 | |
| 553 | static av_cold int flashsv2_decode_end(AVCodecContext *avctx) |
| 554 | { |
| 555 | FlashSVContext *s = avctx->priv_data; |
| 556 | |
| 557 | av_freep(&s->keyframedata); |
| 558 | av_freep(&s->blocks); |
| 559 | av_freep(&s->keyframe); |
| 560 | av_freep(&s->deflate_block); |
| 561 | flashsv_decode_end(avctx); |
| 562 | |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | AVCodec ff_flashsv2_decoder = { |
| 567 | .name = "flashsv2", |
| 568 | .long_name = NULL_IF_CONFIG_SMALL("Flash Screen Video v2"), |
| 569 | .type = AVMEDIA_TYPE_VIDEO, |
| 570 | .id = AV_CODEC_ID_FLASHSV2, |
| 571 | .priv_data_size = sizeof(FlashSVContext), |
| 572 | .init = flashsv2_decode_init, |
| 573 | .close = flashsv2_decode_end, |
| 574 | .decode = flashsv_decode_frame, |
| 575 | .capabilities = CODEC_CAP_DR1, |
| 576 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE }, |
| 577 | }; |
| 578 | #endif /* CONFIG_FLASHSV2_DECODER */ |