| 1 | /* |
| 2 | * Interplay MVE Video Decoder |
| 3 | * Copyright (c) 2003 The FFmpeg Project |
| 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 | * Interplay MVE Video Decoder by Mike Melanson (melanson@pcisys.net) |
| 25 | * For more information about the Interplay MVE format, visit: |
| 26 | * http://www.pcisys.net/~melanson/codecs/interplay-mve.txt |
| 27 | * This code is written in such a way that the identifiers match up |
| 28 | * with the encoding descriptions in the document. |
| 29 | * |
| 30 | * This decoder presently only supports a PAL8 output colorspace. |
| 31 | * |
| 32 | * An Interplay video frame consists of 2 parts: The decoding map and |
| 33 | * the video data. A demuxer must load these 2 parts together in a single |
| 34 | * buffer before sending it through the stream to this decoder. |
| 35 | */ |
| 36 | |
| 37 | #include <stdio.h> |
| 38 | #include <stdlib.h> |
| 39 | #include <string.h> |
| 40 | |
| 41 | #include "avcodec.h" |
| 42 | #include "bytestream.h" |
| 43 | #include "hpeldsp.h" |
| 44 | #define BITSTREAM_READER_LE |
| 45 | #include "get_bits.h" |
| 46 | #include "internal.h" |
| 47 | |
| 48 | #define PALETTE_COUNT 256 |
| 49 | |
| 50 | typedef struct IpvideoContext { |
| 51 | |
| 52 | AVCodecContext *avctx; |
| 53 | HpelDSPContext hdsp; |
| 54 | AVFrame *second_last_frame; |
| 55 | AVFrame *last_frame; |
| 56 | const unsigned char *decoding_map; |
| 57 | int decoding_map_size; |
| 58 | |
| 59 | int is_16bpp; |
| 60 | GetByteContext stream_ptr, mv_ptr; |
| 61 | unsigned char *pixel_ptr; |
| 62 | int line_inc; |
| 63 | int stride; |
| 64 | int upper_motion_limit_offset; |
| 65 | |
| 66 | uint32_t pal[256]; |
| 67 | } IpvideoContext; |
| 68 | |
| 69 | static int copy_from(IpvideoContext *s, AVFrame *src, AVFrame *dst, int delta_x, int delta_y) |
| 70 | { |
| 71 | int current_offset = s->pixel_ptr - dst->data[0]; |
| 72 | int motion_offset = current_offset + delta_y * dst->linesize[0] |
| 73 | + delta_x * (1 + s->is_16bpp); |
| 74 | if (motion_offset < 0) { |
| 75 | av_log(s->avctx, AV_LOG_ERROR, "motion offset < 0 (%d)\n", motion_offset); |
| 76 | return AVERROR_INVALIDDATA; |
| 77 | } else if (motion_offset > s->upper_motion_limit_offset) { |
| 78 | av_log(s->avctx, AV_LOG_ERROR, "motion offset above limit (%d >= %d)\n", |
| 79 | motion_offset, s->upper_motion_limit_offset); |
| 80 | return AVERROR_INVALIDDATA; |
| 81 | } |
| 82 | if (!src->data[0]) { |
| 83 | av_log(s->avctx, AV_LOG_ERROR, "Invalid decode type, corrupted header?\n"); |
| 84 | return AVERROR(EINVAL); |
| 85 | } |
| 86 | s->hdsp.put_pixels_tab[!s->is_16bpp][0](s->pixel_ptr, src->data[0] + motion_offset, |
| 87 | dst->linesize[0], 8); |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | static int ipvideo_decode_block_opcode_0x0(IpvideoContext *s, AVFrame *frame) |
| 92 | { |
| 93 | return copy_from(s, s->last_frame, frame, 0, 0); |
| 94 | } |
| 95 | |
| 96 | static int ipvideo_decode_block_opcode_0x1(IpvideoContext *s, AVFrame *frame) |
| 97 | { |
| 98 | return copy_from(s, s->second_last_frame, frame, 0, 0); |
| 99 | } |
| 100 | |
| 101 | static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s, AVFrame *frame) |
| 102 | { |
| 103 | unsigned char B; |
| 104 | int x, y; |
| 105 | |
| 106 | /* copy block from 2 frames ago using a motion vector; need 1 more byte */ |
| 107 | if (!s->is_16bpp) { |
| 108 | B = bytestream2_get_byte(&s->stream_ptr); |
| 109 | } else { |
| 110 | B = bytestream2_get_byte(&s->mv_ptr); |
| 111 | } |
| 112 | |
| 113 | if (B < 56) { |
| 114 | x = 8 + (B % 7); |
| 115 | y = B / 7; |
| 116 | } else { |
| 117 | x = -14 + ((B - 56) % 29); |
| 118 | y = 8 + ((B - 56) / 29); |
| 119 | } |
| 120 | |
| 121 | av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
| 122 | return copy_from(s, s->second_last_frame, frame, x, y); |
| 123 | } |
| 124 | |
| 125 | static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s, AVFrame *frame) |
| 126 | { |
| 127 | unsigned char B; |
| 128 | int x, y; |
| 129 | |
| 130 | /* copy 8x8 block from current frame from an up/left block */ |
| 131 | |
| 132 | /* need 1 more byte for motion */ |
| 133 | if (!s->is_16bpp) { |
| 134 | B = bytestream2_get_byte(&s->stream_ptr); |
| 135 | } else { |
| 136 | B = bytestream2_get_byte(&s->mv_ptr); |
| 137 | } |
| 138 | |
| 139 | if (B < 56) { |
| 140 | x = -(8 + (B % 7)); |
| 141 | y = -(B / 7); |
| 142 | } else { |
| 143 | x = -(-14 + ((B - 56) % 29)); |
| 144 | y = -( 8 + ((B - 56) / 29)); |
| 145 | } |
| 146 | |
| 147 | av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
| 148 | return copy_from(s, frame, frame, x, y); |
| 149 | } |
| 150 | |
| 151 | static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s, AVFrame *frame) |
| 152 | { |
| 153 | int x, y; |
| 154 | unsigned char B, BL, BH; |
| 155 | |
| 156 | /* copy a block from the previous frame; need 1 more byte */ |
| 157 | if (!s->is_16bpp) { |
| 158 | B = bytestream2_get_byte(&s->stream_ptr); |
| 159 | } else { |
| 160 | B = bytestream2_get_byte(&s->mv_ptr); |
| 161 | } |
| 162 | |
| 163 | BL = B & 0x0F; |
| 164 | BH = (B >> 4) & 0x0F; |
| 165 | x = -8 + BL; |
| 166 | y = -8 + BH; |
| 167 | |
| 168 | av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
| 169 | return copy_from(s, s->last_frame, frame, x, y); |
| 170 | } |
| 171 | |
| 172 | static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s, AVFrame *frame) |
| 173 | { |
| 174 | signed char x, y; |
| 175 | |
| 176 | /* copy a block from the previous frame using an expanded range; |
| 177 | * need 2 more bytes */ |
| 178 | x = bytestream2_get_byte(&s->stream_ptr); |
| 179 | y = bytestream2_get_byte(&s->stream_ptr); |
| 180 | |
| 181 | av_dlog(s->avctx, "motion bytes = %d, %d\n", x, y); |
| 182 | return copy_from(s, s->last_frame, frame, x, y); |
| 183 | } |
| 184 | |
| 185 | static int ipvideo_decode_block_opcode_0x6(IpvideoContext *s, AVFrame *frame) |
| 186 | { |
| 187 | /* mystery opcode? skip multiple blocks? */ |
| 188 | av_log(s->avctx, AV_LOG_ERROR, "Help! Mystery opcode 0x6 seen\n"); |
| 189 | |
| 190 | /* report success */ |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static int ipvideo_decode_block_opcode_0x7(IpvideoContext *s, AVFrame *frame) |
| 195 | { |
| 196 | int x, y; |
| 197 | unsigned char P[2]; |
| 198 | unsigned int flags; |
| 199 | |
| 200 | if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) { |
| 201 | av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x7\n"); |
| 202 | return AVERROR_INVALIDDATA; |
| 203 | } |
| 204 | |
| 205 | /* 2-color encoding */ |
| 206 | P[0] = bytestream2_get_byte(&s->stream_ptr); |
| 207 | P[1] = bytestream2_get_byte(&s->stream_ptr); |
| 208 | |
| 209 | if (P[0] <= P[1]) { |
| 210 | |
| 211 | /* need 8 more bytes from the stream */ |
| 212 | for (y = 0; y < 8; y++) { |
| 213 | flags = bytestream2_get_byte(&s->stream_ptr) | 0x100; |
| 214 | for (; flags != 1; flags >>= 1) |
| 215 | *s->pixel_ptr++ = P[flags & 1]; |
| 216 | s->pixel_ptr += s->line_inc; |
| 217 | } |
| 218 | |
| 219 | } else { |
| 220 | |
| 221 | /* need 2 more bytes from the stream */ |
| 222 | flags = bytestream2_get_le16(&s->stream_ptr); |
| 223 | for (y = 0; y < 8; y += 2) { |
| 224 | for (x = 0; x < 8; x += 2, flags >>= 1) { |
| 225 | s->pixel_ptr[x ] = |
| 226 | s->pixel_ptr[x + 1 ] = |
| 227 | s->pixel_ptr[x + s->stride] = |
| 228 | s->pixel_ptr[x + 1 + s->stride] = P[flags & 1]; |
| 229 | } |
| 230 | s->pixel_ptr += s->stride * 2; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /* report success */ |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | static int ipvideo_decode_block_opcode_0x8(IpvideoContext *s, AVFrame *frame) |
| 239 | { |
| 240 | int x, y; |
| 241 | unsigned char P[4]; |
| 242 | unsigned int flags = 0; |
| 243 | |
| 244 | if (bytestream2_get_bytes_left(&s->stream_ptr) < 12) { |
| 245 | av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x8\n"); |
| 246 | return AVERROR_INVALIDDATA; |
| 247 | } |
| 248 | |
| 249 | /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on |
| 250 | * either top and bottom or left and right halves */ |
| 251 | P[0] = bytestream2_get_byte(&s->stream_ptr); |
| 252 | P[1] = bytestream2_get_byte(&s->stream_ptr); |
| 253 | |
| 254 | if (P[0] <= P[1]) { |
| 255 | for (y = 0; y < 16; y++) { |
| 256 | // new values for each 4x4 block |
| 257 | if (!(y & 3)) { |
| 258 | if (y) { |
| 259 | P[0] = bytestream2_get_byte(&s->stream_ptr); |
| 260 | P[1] = bytestream2_get_byte(&s->stream_ptr); |
| 261 | } |
| 262 | flags = bytestream2_get_le16(&s->stream_ptr); |
| 263 | } |
| 264 | |
| 265 | for (x = 0; x < 4; x++, flags >>= 1) |
| 266 | *s->pixel_ptr++ = P[flags & 1]; |
| 267 | s->pixel_ptr += s->stride - 4; |
| 268 | // switch to right half |
| 269 | if (y == 7) s->pixel_ptr -= 8 * s->stride - 4; |
| 270 | } |
| 271 | |
| 272 | } else { |
| 273 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 274 | P[2] = bytestream2_get_byte(&s->stream_ptr); |
| 275 | P[3] = bytestream2_get_byte(&s->stream_ptr); |
| 276 | |
| 277 | if (P[2] <= P[3]) { |
| 278 | |
| 279 | /* vertical split; left & right halves are 2-color encoded */ |
| 280 | |
| 281 | for (y = 0; y < 16; y++) { |
| 282 | for (x = 0; x < 4; x++, flags >>= 1) |
| 283 | *s->pixel_ptr++ = P[flags & 1]; |
| 284 | s->pixel_ptr += s->stride - 4; |
| 285 | // switch to right half |
| 286 | if (y == 7) { |
| 287 | s->pixel_ptr -= 8 * s->stride - 4; |
| 288 | P[0] = P[2]; |
| 289 | P[1] = P[3]; |
| 290 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | } else { |
| 295 | |
| 296 | /* horizontal split; top & bottom halves are 2-color encoded */ |
| 297 | |
| 298 | for (y = 0; y < 8; y++) { |
| 299 | if (y == 4) { |
| 300 | P[0] = P[2]; |
| 301 | P[1] = P[3]; |
| 302 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 303 | } |
| 304 | |
| 305 | for (x = 0; x < 8; x++, flags >>= 1) |
| 306 | *s->pixel_ptr++ = P[flags & 1]; |
| 307 | s->pixel_ptr += s->line_inc; |
| 308 | } |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | /* report success */ |
| 313 | return 0; |
| 314 | } |
| 315 | |
| 316 | static int ipvideo_decode_block_opcode_0x9(IpvideoContext *s, AVFrame *frame) |
| 317 | { |
| 318 | int x, y; |
| 319 | unsigned char P[4]; |
| 320 | |
| 321 | if (bytestream2_get_bytes_left(&s->stream_ptr) < 8) { |
| 322 | av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x9\n"); |
| 323 | return AVERROR_INVALIDDATA; |
| 324 | } |
| 325 | |
| 326 | /* 4-color encoding */ |
| 327 | bytestream2_get_buffer(&s->stream_ptr, P, 4); |
| 328 | |
| 329 | if (P[0] <= P[1]) { |
| 330 | if (P[2] <= P[3]) { |
| 331 | |
| 332 | /* 1 of 4 colors for each pixel, need 16 more bytes */ |
| 333 | for (y = 0; y < 8; y++) { |
| 334 | /* get the next set of 8 2-bit flags */ |
| 335 | int flags = bytestream2_get_le16(&s->stream_ptr); |
| 336 | for (x = 0; x < 8; x++, flags >>= 2) |
| 337 | *s->pixel_ptr++ = P[flags & 0x03]; |
| 338 | s->pixel_ptr += s->line_inc; |
| 339 | } |
| 340 | |
| 341 | } else { |
| 342 | uint32_t flags; |
| 343 | |
| 344 | /* 1 of 4 colors for each 2x2 block, need 4 more bytes */ |
| 345 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 346 | |
| 347 | for (y = 0; y < 8; y += 2) { |
| 348 | for (x = 0; x < 8; x += 2, flags >>= 2) { |
| 349 | s->pixel_ptr[x ] = |
| 350 | s->pixel_ptr[x + 1 ] = |
| 351 | s->pixel_ptr[x + s->stride] = |
| 352 | s->pixel_ptr[x + 1 + s->stride] = P[flags & 0x03]; |
| 353 | } |
| 354 | s->pixel_ptr += s->stride * 2; |
| 355 | } |
| 356 | |
| 357 | } |
| 358 | } else { |
| 359 | uint64_t flags; |
| 360 | |
| 361 | /* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */ |
| 362 | flags = bytestream2_get_le64(&s->stream_ptr); |
| 363 | if (P[2] <= P[3]) { |
| 364 | for (y = 0; y < 8; y++) { |
| 365 | for (x = 0; x < 8; x += 2, flags >>= 2) { |
| 366 | s->pixel_ptr[x ] = |
| 367 | s->pixel_ptr[x + 1] = P[flags & 0x03]; |
| 368 | } |
| 369 | s->pixel_ptr += s->stride; |
| 370 | } |
| 371 | } else { |
| 372 | for (y = 0; y < 8; y += 2) { |
| 373 | for (x = 0; x < 8; x++, flags >>= 2) { |
| 374 | s->pixel_ptr[x ] = |
| 375 | s->pixel_ptr[x + s->stride] = P[flags & 0x03]; |
| 376 | } |
| 377 | s->pixel_ptr += s->stride * 2; |
| 378 | } |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | /* report success */ |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | static int ipvideo_decode_block_opcode_0xA(IpvideoContext *s, AVFrame *frame) |
| 387 | { |
| 388 | int x, y; |
| 389 | unsigned char P[8]; |
| 390 | int flags = 0; |
| 391 | |
| 392 | if (bytestream2_get_bytes_left(&s->stream_ptr) < 16) { |
| 393 | av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xA\n"); |
| 394 | return AVERROR_INVALIDDATA; |
| 395 | } |
| 396 | |
| 397 | bytestream2_get_buffer(&s->stream_ptr, P, 4); |
| 398 | |
| 399 | /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on |
| 400 | * either top and bottom or left and right halves */ |
| 401 | if (P[0] <= P[1]) { |
| 402 | |
| 403 | /* 4-color encoding for each quadrant; need 32 bytes */ |
| 404 | for (y = 0; y < 16; y++) { |
| 405 | // new values for each 4x4 block |
| 406 | if (!(y & 3)) { |
| 407 | if (y) bytestream2_get_buffer(&s->stream_ptr, P, 4); |
| 408 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 409 | } |
| 410 | |
| 411 | for (x = 0; x < 4; x++, flags >>= 2) |
| 412 | *s->pixel_ptr++ = P[flags & 0x03]; |
| 413 | |
| 414 | s->pixel_ptr += s->stride - 4; |
| 415 | // switch to right half |
| 416 | if (y == 7) s->pixel_ptr -= 8 * s->stride - 4; |
| 417 | } |
| 418 | |
| 419 | } else { |
| 420 | // vertical split? |
| 421 | int vert; |
| 422 | uint64_t flags = bytestream2_get_le64(&s->stream_ptr); |
| 423 | |
| 424 | bytestream2_get_buffer(&s->stream_ptr, P + 4, 4); |
| 425 | vert = P[4] <= P[5]; |
| 426 | |
| 427 | /* 4-color encoding for either left and right or top and bottom |
| 428 | * halves */ |
| 429 | |
| 430 | for (y = 0; y < 16; y++) { |
| 431 | for (x = 0; x < 4; x++, flags >>= 2) |
| 432 | *s->pixel_ptr++ = P[flags & 0x03]; |
| 433 | |
| 434 | if (vert) { |
| 435 | s->pixel_ptr += s->stride - 4; |
| 436 | // switch to right half |
| 437 | if (y == 7) s->pixel_ptr -= 8 * s->stride - 4; |
| 438 | } else if (y & 1) s->pixel_ptr += s->line_inc; |
| 439 | |
| 440 | // load values for second half |
| 441 | if (y == 7) { |
| 442 | memcpy(P, P + 4, 4); |
| 443 | flags = bytestream2_get_le64(&s->stream_ptr); |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | /* report success */ |
| 449 | return 0; |
| 450 | } |
| 451 | |
| 452 | static int ipvideo_decode_block_opcode_0xB(IpvideoContext *s, AVFrame *frame) |
| 453 | { |
| 454 | int y; |
| 455 | |
| 456 | /* 64-color encoding (each pixel in block is a different color) */ |
| 457 | for (y = 0; y < 8; y++) { |
| 458 | bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8); |
| 459 | s->pixel_ptr += s->stride; |
| 460 | } |
| 461 | |
| 462 | /* report success */ |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s, AVFrame *frame) |
| 467 | { |
| 468 | int x, y; |
| 469 | |
| 470 | /* 16-color block encoding: each 2x2 block is a different color */ |
| 471 | for (y = 0; y < 8; y += 2) { |
| 472 | for (x = 0; x < 8; x += 2) { |
| 473 | s->pixel_ptr[x ] = |
| 474 | s->pixel_ptr[x + 1 ] = |
| 475 | s->pixel_ptr[x + s->stride] = |
| 476 | s->pixel_ptr[x + 1 + s->stride] = bytestream2_get_byte(&s->stream_ptr); |
| 477 | } |
| 478 | s->pixel_ptr += s->stride * 2; |
| 479 | } |
| 480 | |
| 481 | /* report success */ |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s, AVFrame *frame) |
| 486 | { |
| 487 | int y; |
| 488 | unsigned char P[2]; |
| 489 | |
| 490 | if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) { |
| 491 | av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xD\n"); |
| 492 | return AVERROR_INVALIDDATA; |
| 493 | } |
| 494 | |
| 495 | /* 4-color block encoding: each 4x4 block is a different color */ |
| 496 | for (y = 0; y < 8; y++) { |
| 497 | if (!(y & 3)) { |
| 498 | P[0] = bytestream2_get_byte(&s->stream_ptr); |
| 499 | P[1] = bytestream2_get_byte(&s->stream_ptr); |
| 500 | } |
| 501 | memset(s->pixel_ptr, P[0], 4); |
| 502 | memset(s->pixel_ptr + 4, P[1], 4); |
| 503 | s->pixel_ptr += s->stride; |
| 504 | } |
| 505 | |
| 506 | /* report success */ |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | static int ipvideo_decode_block_opcode_0xE(IpvideoContext *s, AVFrame *frame) |
| 511 | { |
| 512 | int y; |
| 513 | unsigned char pix; |
| 514 | |
| 515 | /* 1-color encoding: the whole block is 1 solid color */ |
| 516 | pix = bytestream2_get_byte(&s->stream_ptr); |
| 517 | |
| 518 | for (y = 0; y < 8; y++) { |
| 519 | memset(s->pixel_ptr, pix, 8); |
| 520 | s->pixel_ptr += s->stride; |
| 521 | } |
| 522 | |
| 523 | /* report success */ |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | static int ipvideo_decode_block_opcode_0xF(IpvideoContext *s, AVFrame *frame) |
| 528 | { |
| 529 | int x, y; |
| 530 | unsigned char sample[2]; |
| 531 | |
| 532 | /* dithered encoding */ |
| 533 | sample[0] = bytestream2_get_byte(&s->stream_ptr); |
| 534 | sample[1] = bytestream2_get_byte(&s->stream_ptr); |
| 535 | |
| 536 | for (y = 0; y < 8; y++) { |
| 537 | for (x = 0; x < 8; x += 2) { |
| 538 | *s->pixel_ptr++ = sample[ y & 1 ]; |
| 539 | *s->pixel_ptr++ = sample[!(y & 1)]; |
| 540 | } |
| 541 | s->pixel_ptr += s->line_inc; |
| 542 | } |
| 543 | |
| 544 | /* report success */ |
| 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | static int ipvideo_decode_block_opcode_0x6_16(IpvideoContext *s, AVFrame *frame) |
| 549 | { |
| 550 | signed char x, y; |
| 551 | |
| 552 | /* copy a block from the second last frame using an expanded range */ |
| 553 | x = bytestream2_get_byte(&s->stream_ptr); |
| 554 | y = bytestream2_get_byte(&s->stream_ptr); |
| 555 | |
| 556 | av_dlog(s->avctx, "motion bytes = %d, %d\n", x, y); |
| 557 | return copy_from(s, s->second_last_frame, frame, x, y); |
| 558 | } |
| 559 | |
| 560 | static int ipvideo_decode_block_opcode_0x7_16(IpvideoContext *s, AVFrame *frame) |
| 561 | { |
| 562 | int x, y; |
| 563 | uint16_t P[2]; |
| 564 | unsigned int flags; |
| 565 | uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
| 566 | |
| 567 | /* 2-color encoding */ |
| 568 | P[0] = bytestream2_get_le16(&s->stream_ptr); |
| 569 | P[1] = bytestream2_get_le16(&s->stream_ptr); |
| 570 | |
| 571 | if (!(P[0] & 0x8000)) { |
| 572 | |
| 573 | for (y = 0; y < 8; y++) { |
| 574 | flags = bytestream2_get_byte(&s->stream_ptr) | 0x100; |
| 575 | for (; flags != 1; flags >>= 1) |
| 576 | *pixel_ptr++ = P[flags & 1]; |
| 577 | pixel_ptr += s->line_inc; |
| 578 | } |
| 579 | |
| 580 | } else { |
| 581 | |
| 582 | flags = bytestream2_get_le16(&s->stream_ptr); |
| 583 | for (y = 0; y < 8; y += 2) { |
| 584 | for (x = 0; x < 8; x += 2, flags >>= 1) { |
| 585 | pixel_ptr[x ] = |
| 586 | pixel_ptr[x + 1 ] = |
| 587 | pixel_ptr[x + s->stride] = |
| 588 | pixel_ptr[x + 1 + s->stride] = P[flags & 1]; |
| 589 | } |
| 590 | pixel_ptr += s->stride * 2; |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | static int ipvideo_decode_block_opcode_0x8_16(IpvideoContext *s, AVFrame *frame) |
| 598 | { |
| 599 | int x, y; |
| 600 | uint16_t P[4]; |
| 601 | unsigned int flags = 0; |
| 602 | uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
| 603 | |
| 604 | /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on |
| 605 | * either top and bottom or left and right halves */ |
| 606 | P[0] = bytestream2_get_le16(&s->stream_ptr); |
| 607 | P[1] = bytestream2_get_le16(&s->stream_ptr); |
| 608 | |
| 609 | if (!(P[0] & 0x8000)) { |
| 610 | |
| 611 | for (y = 0; y < 16; y++) { |
| 612 | // new values for each 4x4 block |
| 613 | if (!(y & 3)) { |
| 614 | if (y) { |
| 615 | P[0] = bytestream2_get_le16(&s->stream_ptr); |
| 616 | P[1] = bytestream2_get_le16(&s->stream_ptr); |
| 617 | } |
| 618 | flags = bytestream2_get_le16(&s->stream_ptr); |
| 619 | } |
| 620 | |
| 621 | for (x = 0; x < 4; x++, flags >>= 1) |
| 622 | *pixel_ptr++ = P[flags & 1]; |
| 623 | pixel_ptr += s->stride - 4; |
| 624 | // switch to right half |
| 625 | if (y == 7) pixel_ptr -= 8 * s->stride - 4; |
| 626 | } |
| 627 | |
| 628 | } else { |
| 629 | |
| 630 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 631 | P[2] = bytestream2_get_le16(&s->stream_ptr); |
| 632 | P[3] = bytestream2_get_le16(&s->stream_ptr); |
| 633 | |
| 634 | if (!(P[2] & 0x8000)) { |
| 635 | |
| 636 | /* vertical split; left & right halves are 2-color encoded */ |
| 637 | |
| 638 | for (y = 0; y < 16; y++) { |
| 639 | for (x = 0; x < 4; x++, flags >>= 1) |
| 640 | *pixel_ptr++ = P[flags & 1]; |
| 641 | pixel_ptr += s->stride - 4; |
| 642 | // switch to right half |
| 643 | if (y == 7) { |
| 644 | pixel_ptr -= 8 * s->stride - 4; |
| 645 | P[0] = P[2]; |
| 646 | P[1] = P[3]; |
| 647 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 648 | } |
| 649 | } |
| 650 | |
| 651 | } else { |
| 652 | |
| 653 | /* horizontal split; top & bottom halves are 2-color encoded */ |
| 654 | |
| 655 | for (y = 0; y < 8; y++) { |
| 656 | if (y == 4) { |
| 657 | P[0] = P[2]; |
| 658 | P[1] = P[3]; |
| 659 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 660 | } |
| 661 | |
| 662 | for (x = 0; x < 8; x++, flags >>= 1) |
| 663 | *pixel_ptr++ = P[flags & 1]; |
| 664 | pixel_ptr += s->line_inc; |
| 665 | } |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | /* report success */ |
| 670 | return 0; |
| 671 | } |
| 672 | |
| 673 | static int ipvideo_decode_block_opcode_0x9_16(IpvideoContext *s, AVFrame *frame) |
| 674 | { |
| 675 | int x, y; |
| 676 | uint16_t P[4]; |
| 677 | uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
| 678 | |
| 679 | /* 4-color encoding */ |
| 680 | for (x = 0; x < 4; x++) |
| 681 | P[x] = bytestream2_get_le16(&s->stream_ptr); |
| 682 | |
| 683 | if (!(P[0] & 0x8000)) { |
| 684 | if (!(P[2] & 0x8000)) { |
| 685 | |
| 686 | /* 1 of 4 colors for each pixel */ |
| 687 | for (y = 0; y < 8; y++) { |
| 688 | /* get the next set of 8 2-bit flags */ |
| 689 | int flags = bytestream2_get_le16(&s->stream_ptr); |
| 690 | for (x = 0; x < 8; x++, flags >>= 2) |
| 691 | *pixel_ptr++ = P[flags & 0x03]; |
| 692 | pixel_ptr += s->line_inc; |
| 693 | } |
| 694 | |
| 695 | } else { |
| 696 | uint32_t flags; |
| 697 | |
| 698 | /* 1 of 4 colors for each 2x2 block */ |
| 699 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 700 | |
| 701 | for (y = 0; y < 8; y += 2) { |
| 702 | for (x = 0; x < 8; x += 2, flags >>= 2) { |
| 703 | pixel_ptr[x ] = |
| 704 | pixel_ptr[x + 1 ] = |
| 705 | pixel_ptr[x + s->stride] = |
| 706 | pixel_ptr[x + 1 + s->stride] = P[flags & 0x03]; |
| 707 | } |
| 708 | pixel_ptr += s->stride * 2; |
| 709 | } |
| 710 | |
| 711 | } |
| 712 | } else { |
| 713 | uint64_t flags; |
| 714 | |
| 715 | /* 1 of 4 colors for each 2x1 or 1x2 block */ |
| 716 | flags = bytestream2_get_le64(&s->stream_ptr); |
| 717 | if (!(P[2] & 0x8000)) { |
| 718 | for (y = 0; y < 8; y++) { |
| 719 | for (x = 0; x < 8; x += 2, flags >>= 2) { |
| 720 | pixel_ptr[x ] = |
| 721 | pixel_ptr[x + 1] = P[flags & 0x03]; |
| 722 | } |
| 723 | pixel_ptr += s->stride; |
| 724 | } |
| 725 | } else { |
| 726 | for (y = 0; y < 8; y += 2) { |
| 727 | for (x = 0; x < 8; x++, flags >>= 2) { |
| 728 | pixel_ptr[x ] = |
| 729 | pixel_ptr[x + s->stride] = P[flags & 0x03]; |
| 730 | } |
| 731 | pixel_ptr += s->stride * 2; |
| 732 | } |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | /* report success */ |
| 737 | return 0; |
| 738 | } |
| 739 | |
| 740 | static int ipvideo_decode_block_opcode_0xA_16(IpvideoContext *s, AVFrame *frame) |
| 741 | { |
| 742 | int x, y; |
| 743 | uint16_t P[8]; |
| 744 | int flags = 0; |
| 745 | uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
| 746 | |
| 747 | for (x = 0; x < 4; x++) |
| 748 | P[x] = bytestream2_get_le16(&s->stream_ptr); |
| 749 | |
| 750 | /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on |
| 751 | * either top and bottom or left and right halves */ |
| 752 | if (!(P[0] & 0x8000)) { |
| 753 | |
| 754 | /* 4-color encoding for each quadrant */ |
| 755 | for (y = 0; y < 16; y++) { |
| 756 | // new values for each 4x4 block |
| 757 | if (!(y & 3)) { |
| 758 | if (y) |
| 759 | for (x = 0; x < 4; x++) |
| 760 | P[x] = bytestream2_get_le16(&s->stream_ptr); |
| 761 | flags = bytestream2_get_le32(&s->stream_ptr); |
| 762 | } |
| 763 | |
| 764 | for (x = 0; x < 4; x++, flags >>= 2) |
| 765 | *pixel_ptr++ = P[flags & 0x03]; |
| 766 | |
| 767 | pixel_ptr += s->stride - 4; |
| 768 | // switch to right half |
| 769 | if (y == 7) pixel_ptr -= 8 * s->stride - 4; |
| 770 | } |
| 771 | |
| 772 | } else { |
| 773 | // vertical split? |
| 774 | int vert; |
| 775 | uint64_t flags = bytestream2_get_le64(&s->stream_ptr); |
| 776 | |
| 777 | for (x = 4; x < 8; x++) |
| 778 | P[x] = bytestream2_get_le16(&s->stream_ptr); |
| 779 | vert = !(P[4] & 0x8000); |
| 780 | |
| 781 | /* 4-color encoding for either left and right or top and bottom |
| 782 | * halves */ |
| 783 | |
| 784 | for (y = 0; y < 16; y++) { |
| 785 | for (x = 0; x < 4; x++, flags >>= 2) |
| 786 | *pixel_ptr++ = P[flags & 0x03]; |
| 787 | |
| 788 | if (vert) { |
| 789 | pixel_ptr += s->stride - 4; |
| 790 | // switch to right half |
| 791 | if (y == 7) pixel_ptr -= 8 * s->stride - 4; |
| 792 | } else if (y & 1) pixel_ptr += s->line_inc; |
| 793 | |
| 794 | // load values for second half |
| 795 | if (y == 7) { |
| 796 | memcpy(P, P + 4, 8); |
| 797 | flags = bytestream2_get_le64(&s->stream_ptr); |
| 798 | } |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | /* report success */ |
| 803 | return 0; |
| 804 | } |
| 805 | |
| 806 | static int ipvideo_decode_block_opcode_0xB_16(IpvideoContext *s, AVFrame *frame) |
| 807 | { |
| 808 | int x, y; |
| 809 | uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
| 810 | |
| 811 | /* 64-color encoding (each pixel in block is a different color) */ |
| 812 | for (y = 0; y < 8; y++) { |
| 813 | for (x = 0; x < 8; x++) |
| 814 | pixel_ptr[x] = bytestream2_get_le16(&s->stream_ptr); |
| 815 | pixel_ptr += s->stride; |
| 816 | } |
| 817 | |
| 818 | /* report success */ |
| 819 | return 0; |
| 820 | } |
| 821 | |
| 822 | static int ipvideo_decode_block_opcode_0xC_16(IpvideoContext *s, AVFrame *frame) |
| 823 | { |
| 824 | int x, y; |
| 825 | uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
| 826 | |
| 827 | /* 16-color block encoding: each 2x2 block is a different color */ |
| 828 | for (y = 0; y < 8; y += 2) { |
| 829 | for (x = 0; x < 8; x += 2) { |
| 830 | pixel_ptr[x ] = |
| 831 | pixel_ptr[x + 1 ] = |
| 832 | pixel_ptr[x + s->stride] = |
| 833 | pixel_ptr[x + 1 + s->stride] = bytestream2_get_le16(&s->stream_ptr); |
| 834 | } |
| 835 | pixel_ptr += s->stride * 2; |
| 836 | } |
| 837 | |
| 838 | /* report success */ |
| 839 | return 0; |
| 840 | } |
| 841 | |
| 842 | static int ipvideo_decode_block_opcode_0xD_16(IpvideoContext *s, AVFrame *frame) |
| 843 | { |
| 844 | int x, y; |
| 845 | uint16_t P[2]; |
| 846 | uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
| 847 | |
| 848 | /* 4-color block encoding: each 4x4 block is a different color */ |
| 849 | for (y = 0; y < 8; y++) { |
| 850 | if (!(y & 3)) { |
| 851 | P[0] = bytestream2_get_le16(&s->stream_ptr); |
| 852 | P[1] = bytestream2_get_le16(&s->stream_ptr); |
| 853 | } |
| 854 | for (x = 0; x < 8; x++) |
| 855 | pixel_ptr[x] = P[x >> 2]; |
| 856 | pixel_ptr += s->stride; |
| 857 | } |
| 858 | |
| 859 | /* report success */ |
| 860 | return 0; |
| 861 | } |
| 862 | |
| 863 | static int ipvideo_decode_block_opcode_0xE_16(IpvideoContext *s, AVFrame *frame) |
| 864 | { |
| 865 | int x, y; |
| 866 | uint16_t pix; |
| 867 | uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
| 868 | |
| 869 | /* 1-color encoding: the whole block is 1 solid color */ |
| 870 | pix = bytestream2_get_le16(&s->stream_ptr); |
| 871 | |
| 872 | for (y = 0; y < 8; y++) { |
| 873 | for (x = 0; x < 8; x++) |
| 874 | pixel_ptr[x] = pix; |
| 875 | pixel_ptr += s->stride; |
| 876 | } |
| 877 | |
| 878 | /* report success */ |
| 879 | return 0; |
| 880 | } |
| 881 | |
| 882 | static int (* const ipvideo_decode_block[])(IpvideoContext *s, AVFrame *frame) = { |
| 883 | ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1, |
| 884 | ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3, |
| 885 | ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5, |
| 886 | ipvideo_decode_block_opcode_0x6, ipvideo_decode_block_opcode_0x7, |
| 887 | ipvideo_decode_block_opcode_0x8, ipvideo_decode_block_opcode_0x9, |
| 888 | ipvideo_decode_block_opcode_0xA, ipvideo_decode_block_opcode_0xB, |
| 889 | ipvideo_decode_block_opcode_0xC, ipvideo_decode_block_opcode_0xD, |
| 890 | ipvideo_decode_block_opcode_0xE, ipvideo_decode_block_opcode_0xF, |
| 891 | }; |
| 892 | |
| 893 | static int (* const ipvideo_decode_block16[])(IpvideoContext *s, AVFrame *frame) = { |
| 894 | ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1, |
| 895 | ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3, |
| 896 | ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5, |
| 897 | ipvideo_decode_block_opcode_0x6_16, ipvideo_decode_block_opcode_0x7_16, |
| 898 | ipvideo_decode_block_opcode_0x8_16, ipvideo_decode_block_opcode_0x9_16, |
| 899 | ipvideo_decode_block_opcode_0xA_16, ipvideo_decode_block_opcode_0xB_16, |
| 900 | ipvideo_decode_block_opcode_0xC_16, ipvideo_decode_block_opcode_0xD_16, |
| 901 | ipvideo_decode_block_opcode_0xE_16, ipvideo_decode_block_opcode_0x1, |
| 902 | }; |
| 903 | |
| 904 | static void ipvideo_decode_opcodes(IpvideoContext *s, AVFrame *frame) |
| 905 | { |
| 906 | int x, y; |
| 907 | unsigned char opcode; |
| 908 | int ret; |
| 909 | GetBitContext gb; |
| 910 | |
| 911 | bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */ |
| 912 | if (!s->is_16bpp) { |
| 913 | /* this is PAL8, so make the palette available */ |
| 914 | memcpy(frame->data[1], s->pal, AVPALETTE_SIZE); |
| 915 | |
| 916 | s->stride = frame->linesize[0]; |
| 917 | } else { |
| 918 | s->stride = frame->linesize[0] >> 1; |
| 919 | s->mv_ptr = s->stream_ptr; |
| 920 | bytestream2_skip(&s->mv_ptr, bytestream2_get_le16(&s->stream_ptr)); |
| 921 | } |
| 922 | s->line_inc = s->stride - 8; |
| 923 | s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0] |
| 924 | + (s->avctx->width - 8) * (1 + s->is_16bpp); |
| 925 | |
| 926 | init_get_bits(&gb, s->decoding_map, s->decoding_map_size * 8); |
| 927 | for (y = 0; y < s->avctx->height; y += 8) { |
| 928 | for (x = 0; x < s->avctx->width; x += 8) { |
| 929 | opcode = get_bits(&gb, 4); |
| 930 | |
| 931 | av_dlog(s->avctx, |
| 932 | " block @ (%3d, %3d): encoding 0x%X, data ptr offset %d\n", |
| 933 | x, y, opcode, bytestream2_tell(&s->stream_ptr)); |
| 934 | |
| 935 | if (!s->is_16bpp) { |
| 936 | s->pixel_ptr = frame->data[0] + x |
| 937 | + y*frame->linesize[0]; |
| 938 | ret = ipvideo_decode_block[opcode](s, frame); |
| 939 | } else { |
| 940 | s->pixel_ptr = frame->data[0] + x*2 |
| 941 | + y*frame->linesize[0]; |
| 942 | ret = ipvideo_decode_block16[opcode](s, frame); |
| 943 | } |
| 944 | if (ret != 0) { |
| 945 | av_log(s->avctx, AV_LOG_ERROR, "decode problem on frame %d, @ block (%d, %d)\n", |
| 946 | s->avctx->frame_number, x, y); |
| 947 | return; |
| 948 | } |
| 949 | } |
| 950 | } |
| 951 | if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) { |
| 952 | av_log(s->avctx, AV_LOG_ERROR, |
| 953 | "decode finished with %d bytes left over\n", |
| 954 | bytestream2_get_bytes_left(&s->stream_ptr)); |
| 955 | } |
| 956 | } |
| 957 | |
| 958 | static av_cold int ipvideo_decode_init(AVCodecContext *avctx) |
| 959 | { |
| 960 | IpvideoContext *s = avctx->priv_data; |
| 961 | |
| 962 | s->avctx = avctx; |
| 963 | |
| 964 | s->is_16bpp = avctx->bits_per_coded_sample == 16; |
| 965 | avctx->pix_fmt = s->is_16bpp ? AV_PIX_FMT_RGB555 : AV_PIX_FMT_PAL8; |
| 966 | |
| 967 | ff_hpeldsp_init(&s->hdsp, avctx->flags); |
| 968 | |
| 969 | s->last_frame = av_frame_alloc(); |
| 970 | s->second_last_frame = av_frame_alloc(); |
| 971 | if (!s->last_frame || !s->second_last_frame) { |
| 972 | av_frame_free(&s->last_frame); |
| 973 | av_frame_free(&s->second_last_frame); |
| 974 | return AVERROR(ENOMEM); |
| 975 | } |
| 976 | |
| 977 | return 0; |
| 978 | } |
| 979 | |
| 980 | static int ipvideo_decode_frame(AVCodecContext *avctx, |
| 981 | void *data, int *got_frame, |
| 982 | AVPacket *avpkt) |
| 983 | { |
| 984 | const uint8_t *buf = avpkt->data; |
| 985 | int buf_size = avpkt->size; |
| 986 | IpvideoContext *s = avctx->priv_data; |
| 987 | AVFrame *frame = data; |
| 988 | int ret; |
| 989 | |
| 990 | /* decoding map contains 4 bits of information per 8x8 block */ |
| 991 | s->decoding_map_size = avctx->width * avctx->height / (8 * 8 * 2); |
| 992 | |
| 993 | /* compressed buffer needs to be large enough to at least hold an entire |
| 994 | * decoding map */ |
| 995 | if (buf_size < s->decoding_map_size) |
| 996 | return buf_size; |
| 997 | |
| 998 | if (av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, NULL)) { |
| 999 | av_frame_unref(s->last_frame); |
| 1000 | av_frame_unref(s->second_last_frame); |
| 1001 | } |
| 1002 | |
| 1003 | s->decoding_map = buf; |
| 1004 | bytestream2_init(&s->stream_ptr, buf + s->decoding_map_size, |
| 1005 | buf_size - s->decoding_map_size); |
| 1006 | |
| 1007 | if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) |
| 1008 | return ret; |
| 1009 | |
| 1010 | if (!s->is_16bpp) { |
| 1011 | const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); |
| 1012 | if (pal) { |
| 1013 | frame->palette_has_changed = 1; |
| 1014 | memcpy(s->pal, pal, AVPALETTE_SIZE); |
| 1015 | } |
| 1016 | } |
| 1017 | |
| 1018 | ipvideo_decode_opcodes(s, frame); |
| 1019 | |
| 1020 | *got_frame = 1; |
| 1021 | |
| 1022 | /* shuffle frames */ |
| 1023 | av_frame_unref(s->second_last_frame); |
| 1024 | FFSWAP(AVFrame*, s->second_last_frame, s->last_frame); |
| 1025 | if ((ret = av_frame_ref(s->last_frame, frame)) < 0) |
| 1026 | return ret; |
| 1027 | |
| 1028 | /* report that the buffer was completely consumed */ |
| 1029 | return buf_size; |
| 1030 | } |
| 1031 | |
| 1032 | static av_cold int ipvideo_decode_end(AVCodecContext *avctx) |
| 1033 | { |
| 1034 | IpvideoContext *s = avctx->priv_data; |
| 1035 | |
| 1036 | av_frame_free(&s->last_frame); |
| 1037 | av_frame_free(&s->second_last_frame); |
| 1038 | |
| 1039 | return 0; |
| 1040 | } |
| 1041 | |
| 1042 | AVCodec ff_interplay_video_decoder = { |
| 1043 | .name = "interplayvideo", |
| 1044 | .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"), |
| 1045 | .type = AVMEDIA_TYPE_VIDEO, |
| 1046 | .id = AV_CODEC_ID_INTERPLAY_VIDEO, |
| 1047 | .priv_data_size = sizeof(IpvideoContext), |
| 1048 | .init = ipvideo_decode_init, |
| 1049 | .close = ipvideo_decode_end, |
| 1050 | .decode = ipvideo_decode_frame, |
| 1051 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_PARAM_CHANGE, |
| 1052 | }; |