Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * Cryo Interactive Entertainment HNM4 video decoder |
||
| 3 | * |
||
| 4 | * Copyright (c) 2012 David Kment |
||
| 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 |
||
| 24 | |||
| 25 | #include "libavutil/imgutils.h" |
||
| 26 | #include "libavutil/internal.h" |
||
| 27 | #include "libavutil/intreadwrite.h" |
||
| 28 | #include "libavutil/mem.h" |
||
| 29 | #include "avcodec.h" |
||
| 30 | #include "bytestream.h" |
||
| 31 | #include "internal.h" |
||
| 32 | |||
| 33 | #define HNM4_CHUNK_ID_PL 19536 |
||
| 34 | #define HNM4_CHUNK_ID_IZ 23113 |
||
| 35 | #define HNM4_CHUNK_ID_IU 21833 |
||
| 36 | #define HNM4_CHUNK_ID_SD 17491 |
||
| 37 | |||
| 38 | typedef struct Hnm4VideoContext { |
||
| 39 | uint8_t version; |
||
| 40 | int width; |
||
| 41 | int height; |
||
| 42 | uint8_t *current; |
||
| 43 | uint8_t *previous; |
||
| 44 | uint8_t *buffer1; |
||
| 45 | uint8_t *buffer2; |
||
| 46 | uint8_t *processed; |
||
| 47 | uint32_t palette[256]; |
||
| 48 | } Hnm4VideoContext; |
||
| 49 | |||
| 50 | static int getbit(GetByteContext *gb, uint32_t *bitbuf, int *bits) |
||
| 51 | { |
||
| 52 | int ret; |
||
| 53 | |||
| 54 | if (!*bits) { |
||
| 55 | *bitbuf = bytestream2_get_le32(gb); |
||
| 56 | *bits = 32; |
||
| 57 | } |
||
| 58 | |||
| 59 | ret = *bitbuf >> 31; |
||
| 60 | *bitbuf <<= 1; |
||
| 61 | (*bits)--; |
||
| 62 | |||
| 63 | return ret; |
||
| 64 | } |
||
| 65 | |||
| 66 | static void unpack_intraframe(AVCodecContext *avctx, uint8_t *src, |
||
| 67 | uint32_t size) |
||
| 68 | { |
||
| 69 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 70 | GetByteContext gb; |
||
| 71 | uint32_t bitbuf = 0, writeoffset = 0, count = 0; |
||
| 72 | uint16_t word; |
||
| 73 | int32_t offset; |
||
| 74 | int bits = 0; |
||
| 75 | |||
| 76 | bytestream2_init(&gb, src, size); |
||
| 77 | |||
| 78 | while (bytestream2_tell(&gb) < size) { |
||
| 79 | if (getbit(&gb, &bitbuf, &bits)) { |
||
| 80 | if (writeoffset >= hnm->width * hnm->height) { |
||
| 81 | av_log(avctx, AV_LOG_ERROR, |
||
| 82 | "Attempting to write out of bounds\n"); |
||
| 83 | break; |
||
| 84 | } |
||
| 85 | hnm->current[writeoffset++] = bytestream2_get_byte(&gb); |
||
| 86 | } else { |
||
| 87 | if (getbit(&gb, &bitbuf, &bits)) { |
||
| 88 | word = bytestream2_get_le16(&gb); |
||
| 89 | count = word & 0x07; |
||
| 90 | offset = (word >> 3) - 0x2000; |
||
| 91 | if (!count) |
||
| 92 | count = bytestream2_get_byte(&gb); |
||
| 93 | if (!count) |
||
| 94 | return; |
||
| 95 | } else { |
||
| 96 | count = getbit(&gb, &bitbuf, &bits) * 2; |
||
| 97 | count += getbit(&gb, &bitbuf, &bits); |
||
| 98 | offset = bytestream2_get_byte(&gb) - 0x0100; |
||
| 99 | } |
||
| 100 | count += 2; |
||
| 101 | offset += writeoffset; |
||
| 102 | if (offset < 0 || offset + count >= hnm->width * hnm->height) { |
||
| 103 | av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds\n"); |
||
| 104 | break; |
||
| 105 | } else if (writeoffset + count >= hnm->width * hnm->height) { |
||
| 106 | av_log(avctx, AV_LOG_ERROR, |
||
| 107 | "Attempting to write out of bounds\n"); |
||
| 108 | break; |
||
| 109 | } |
||
| 110 | while (count--) { |
||
| 111 | hnm->current[writeoffset++] = hnm->current[offset++]; |
||
| 112 | } |
||
| 113 | } |
||
| 114 | } |
||
| 115 | } |
||
| 116 | |||
| 117 | static void postprocess_current_frame(AVCodecContext *avctx) |
||
| 118 | { |
||
| 119 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 120 | uint32_t x, y, src_x, src_y; |
||
| 121 | |||
| 122 | for (y = 0; y < hnm->height; y++) { |
||
| 123 | src_y = y - (y % 2); |
||
| 124 | src_x = src_y * hnm->width + (y % 2); |
||
| 125 | for (x = 0; x < hnm->width; x++) { |
||
| 126 | hnm->processed[(y * hnm->width) + x] = hnm->current[src_x]; |
||
| 127 | src_x += 2; |
||
| 128 | } |
||
| 129 | } |
||
| 130 | } |
||
| 131 | |||
| 132 | static void copy_processed_frame(AVCodecContext *avctx, AVFrame *frame) |
||
| 133 | { |
||
| 134 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 135 | uint8_t *src = hnm->processed; |
||
| 136 | uint8_t *dst = frame->data[0]; |
||
| 137 | int y; |
||
| 138 | |||
| 139 | for (y = 0; y < hnm->height; y++) { |
||
| 140 | memcpy(dst, src, hnm->width); |
||
| 141 | src += hnm->width; |
||
| 142 | dst += frame->linesize[0]; |
||
| 143 | } |
||
| 144 | } |
||
| 145 | |||
| 146 | static void decode_interframe_v4(AVCodecContext *avctx, uint8_t *src, uint32_t size) |
||
| 147 | { |
||
| 148 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 149 | GetByteContext gb; |
||
| 150 | uint32_t writeoffset = 0; |
||
| 151 | int count, left, offset; |
||
| 152 | uint8_t tag, previous, backline, backward, swap; |
||
| 153 | |||
| 154 | bytestream2_init(&gb, src, size); |
||
| 155 | |||
| 156 | while (bytestream2_tell(&gb) < size) { |
||
| 157 | count = bytestream2_peek_byte(&gb) & 0x1F; |
||
| 158 | if (count == 0) { |
||
| 159 | tag = bytestream2_get_byte(&gb) & 0xE0; |
||
| 160 | tag = tag >> 5; |
||
| 161 | |||
| 162 | if (tag == 0) { |
||
| 163 | if (writeoffset + 2 > hnm->width * hnm->height) { |
||
| 164 | av_log(avctx, AV_LOG_ERROR, "writeoffset out of bounds\n"); |
||
| 165 | break; |
||
| 166 | } |
||
| 167 | hnm->current[writeoffset++] = bytestream2_get_byte(&gb); |
||
| 168 | hnm->current[writeoffset++] = bytestream2_get_byte(&gb); |
||
| 169 | } else if (tag == 1) { |
||
| 170 | writeoffset += bytestream2_get_byte(&gb) * 2; |
||
| 171 | } else if (tag == 2) { |
||
| 172 | count = bytestream2_get_le16(&gb); |
||
| 173 | count *= 2; |
||
| 174 | writeoffset += count; |
||
| 175 | } else if (tag == 3) { |
||
| 176 | count = bytestream2_get_byte(&gb) * 2; |
||
| 177 | if (writeoffset + count > hnm->width * hnm->height) { |
||
| 178 | av_log(avctx, AV_LOG_ERROR, "writeoffset out of bounds\n"); |
||
| 179 | break; |
||
| 180 | } |
||
| 181 | while (count > 0) { |
||
| 182 | hnm->current[writeoffset++] = bytestream2_peek_byte(&gb); |
||
| 183 | count--; |
||
| 184 | } |
||
| 185 | bytestream2_skip(&gb, 1); |
||
| 186 | } else { |
||
| 187 | break; |
||
| 188 | } |
||
| 189 | if (writeoffset > hnm->width * hnm->height) { |
||
| 190 | av_log(avctx, AV_LOG_ERROR, "writeoffset out of bounds\n"); |
||
| 191 | break; |
||
| 192 | } |
||
| 193 | } else { |
||
| 194 | previous = bytestream2_peek_byte(&gb) & 0x20; |
||
| 195 | backline = bytestream2_peek_byte(&gb) & 0x40; |
||
| 196 | backward = bytestream2_peek_byte(&gb) & 0x80; |
||
| 197 | bytestream2_skip(&gb, 1); |
||
| 198 | swap = bytestream2_peek_byte(&gb) & 0x01; |
||
| 199 | offset = bytestream2_get_le16(&gb); |
||
| 200 | offset = (offset >> 1) & 0x7FFF; |
||
| 201 | offset = writeoffset + (offset * 2) - 0x8000; |
||
| 202 | |||
| 203 | left = count; |
||
| 204 | |||
| 205 | if (!backward && offset + 2*count > hnm->width * hnm->height) { |
||
| 206 | av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds\n"); |
||
| 207 | break; |
||
| 208 | } else if (backward && offset + 1 >= hnm->width * hnm->height) { |
||
| 209 | av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds\n"); |
||
| 210 | break; |
||
| 211 | } else if (writeoffset + 2*count > hnm->width * hnm->height) { |
||
| 212 | av_log(avctx, AV_LOG_ERROR, |
||
| 213 | "Attempting to write out of bounds\n"); |
||
| 214 | break; |
||
| 215 | } |
||
| 216 | if(backward) { |
||
| 217 | if (offset < (!!backline)*(2 * hnm->width - 1) + 2*(left-1)) { |
||
| 218 | av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds\n"); |
||
| 219 | break; |
||
| 220 | } |
||
| 221 | } else { |
||
| 222 | if (offset < (!!backline)*(2 * hnm->width - 1)) { |
||
| 223 | av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds\n"); |
||
| 224 | break; |
||
| 225 | } |
||
| 226 | } |
||
| 227 | |||
| 228 | if (previous) { |
||
| 229 | while (left > 0) { |
||
| 230 | if (backline) { |
||
| 231 | hnm->current[writeoffset++] = hnm->previous[offset - (2 * hnm->width) + 1]; |
||
| 232 | hnm->current[writeoffset++] = hnm->previous[offset++]; |
||
| 233 | offset++; |
||
| 234 | } else { |
||
| 235 | hnm->current[writeoffset++] = hnm->previous[offset++]; |
||
| 236 | hnm->current[writeoffset++] = hnm->previous[offset++]; |
||
| 237 | } |
||
| 238 | if (backward) |
||
| 239 | offset -= 4; |
||
| 240 | left--; |
||
| 241 | } |
||
| 242 | } else { |
||
| 243 | while (left > 0) { |
||
| 244 | if (backline) { |
||
| 245 | hnm->current[writeoffset++] = hnm->current[offset - (2 * hnm->width) + 1]; |
||
| 246 | hnm->current[writeoffset++] = hnm->current[offset++]; |
||
| 247 | offset++; |
||
| 248 | } else { |
||
| 249 | hnm->current[writeoffset++] = hnm->current[offset++]; |
||
| 250 | hnm->current[writeoffset++] = hnm->current[offset++]; |
||
| 251 | } |
||
| 252 | if (backward) |
||
| 253 | offset -= 4; |
||
| 254 | left--; |
||
| 255 | } |
||
| 256 | } |
||
| 257 | |||
| 258 | if (swap) { |
||
| 259 | left = count; |
||
| 260 | writeoffset -= count * 2; |
||
| 261 | while (left > 0) { |
||
| 262 | swap = hnm->current[writeoffset]; |
||
| 263 | hnm->current[writeoffset] = hnm->current[writeoffset + 1]; |
||
| 264 | hnm->current[writeoffset + 1] = swap; |
||
| 265 | left--; |
||
| 266 | writeoffset += 2; |
||
| 267 | } |
||
| 268 | } |
||
| 269 | } |
||
| 270 | } |
||
| 271 | } |
||
| 272 | |||
| 273 | static void decode_interframe_v4a(AVCodecContext *avctx, uint8_t *src, |
||
| 274 | uint32_t size) |
||
| 275 | { |
||
| 276 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 277 | GetByteContext gb; |
||
| 278 | uint32_t writeoffset = 0, offset; |
||
| 279 | uint8_t tag, count, previous, delta; |
||
| 280 | |||
| 281 | bytestream2_init(&gb, src, size); |
||
| 282 | |||
| 283 | while (bytestream2_tell(&gb) < size) { |
||
| 284 | count = bytestream2_peek_byte(&gb) & 0x3F; |
||
| 285 | if (count == 0) { |
||
| 286 | tag = bytestream2_get_byte(&gb) & 0xC0; |
||
| 287 | tag = tag >> 6; |
||
| 288 | if (tag == 0) { |
||
| 289 | writeoffset += bytestream2_get_byte(&gb); |
||
| 290 | } else if (tag == 1) { |
||
| 291 | if (writeoffset + hnm->width >= hnm->width * hnm->height) { |
||
| 292 | av_log(avctx, AV_LOG_ERROR, "writeoffset out of bounds\n"); |
||
| 293 | break; |
||
| 294 | } |
||
| 295 | hnm->current[writeoffset] = bytestream2_get_byte(&gb); |
||
| 296 | hnm->current[writeoffset + hnm->width] = bytestream2_get_byte(&gb); |
||
| 297 | writeoffset++; |
||
| 298 | } else if (tag == 2) { |
||
| 299 | writeoffset += hnm->width; |
||
| 300 | } else if (tag == 3) { |
||
| 301 | break; |
||
| 302 | } |
||
| 303 | if (writeoffset > hnm->width * hnm->height) { |
||
| 304 | av_log(avctx, AV_LOG_ERROR, "writeoffset out of bounds\n"); |
||
| 305 | break; |
||
| 306 | } |
||
| 307 | } else { |
||
| 308 | delta = bytestream2_peek_byte(&gb) & 0x80; |
||
| 309 | previous = bytestream2_peek_byte(&gb) & 0x40; |
||
| 310 | bytestream2_skip(&gb, 1); |
||
| 311 | |||
| 312 | offset = writeoffset; |
||
| 313 | offset += bytestream2_get_le16(&gb); |
||
| 314 | |||
| 315 | if (delta) { |
||
| 316 | if (offset < 0x10000) { |
||
| 317 | av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds\n"); |
||
| 318 | break; |
||
| 319 | } |
||
| 320 | offset -= 0x10000; |
||
| 321 | } |
||
| 322 | |||
| 323 | if (offset + hnm->width + count >= hnm->width * hnm->height) { |
||
| 324 | av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds\n"); |
||
| 325 | break; |
||
| 326 | } else if (writeoffset + hnm->width + count >= hnm->width * hnm->height) { |
||
| 327 | av_log(avctx, AV_LOG_ERROR, "Attempting to write out of bounds\n"); |
||
| 328 | break; |
||
| 329 | } |
||
| 330 | |||
| 331 | if (previous) { |
||
| 332 | while (count > 0) { |
||
| 333 | hnm->current[writeoffset] = hnm->previous[offset]; |
||
| 334 | hnm->current[writeoffset + hnm->width] = hnm->previous[offset + hnm->width]; |
||
| 335 | writeoffset++; |
||
| 336 | offset++; |
||
| 337 | count--; |
||
| 338 | } |
||
| 339 | } else { |
||
| 340 | while (count > 0) { |
||
| 341 | hnm->current[writeoffset] = hnm->current[offset]; |
||
| 342 | hnm->current[writeoffset + hnm->width] = hnm->current[offset + hnm->width]; |
||
| 343 | writeoffset++; |
||
| 344 | offset++; |
||
| 345 | count--; |
||
| 346 | } |
||
| 347 | } |
||
| 348 | } |
||
| 349 | } |
||
| 350 | } |
||
| 351 | |||
| 352 | static void hnm_update_palette(AVCodecContext *avctx, uint8_t *src, |
||
| 353 | uint32_t size) |
||
| 354 | { |
||
| 355 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 356 | GetByteContext gb; |
||
| 357 | uint8_t start, writeoffset; |
||
| 358 | uint16_t count; |
||
| 359 | int eight_bit_colors; |
||
| 360 | |||
| 361 | eight_bit_colors = src[7] & 0x80 && hnm->version == 0x4a; |
||
| 362 | |||
| 363 | // skip first 8 bytes |
||
| 364 | bytestream2_init(&gb, src + 8, size - 8); |
||
| 365 | |||
| 366 | while (bytestream2_tell(&gb) < size - 8) { |
||
| 367 | start = bytestream2_get_byte(&gb); |
||
| 368 | count = bytestream2_get_byte(&gb); |
||
| 369 | if (start == 255 && count == 255) |
||
| 370 | break; |
||
| 371 | if (count == 0) |
||
| 372 | count = 256; |
||
| 373 | writeoffset = start; |
||
| 374 | while (count > 0) { |
||
| 375 | hnm->palette[writeoffset] = bytestream2_get_be24(&gb); |
||
| 376 | if (!eight_bit_colors) |
||
| 377 | hnm->palette[writeoffset] <<= 2; |
||
| 378 | count--; |
||
| 379 | writeoffset++; |
||
| 380 | } |
||
| 381 | } |
||
| 382 | } |
||
| 383 | |||
| 384 | static void hnm_flip_buffers(Hnm4VideoContext *hnm) |
||
| 385 | { |
||
| 386 | uint8_t *temp; |
||
| 387 | |||
| 388 | temp = hnm->current; |
||
| 389 | hnm->current = hnm->previous; |
||
| 390 | hnm->previous = temp; |
||
| 391 | } |
||
| 392 | |||
| 393 | static int hnm_decode_frame(AVCodecContext *avctx, void *data, |
||
| 394 | int *got_frame, AVPacket *avpkt) |
||
| 395 | { |
||
| 396 | AVFrame *frame = data; |
||
| 397 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 398 | int ret; |
||
| 399 | uint16_t chunk_id; |
||
| 400 | |||
| 401 | if (avpkt->size < 8) { |
||
| 402 | av_log(avctx, AV_LOG_ERROR, "packet too small\n"); |
||
| 403 | return AVERROR_INVALIDDATA; |
||
| 404 | } |
||
| 405 | |||
| 406 | chunk_id = AV_RL16(avpkt->data + 4); |
||
| 407 | |||
| 408 | if (chunk_id == HNM4_CHUNK_ID_PL) { |
||
| 409 | hnm_update_palette(avctx, avpkt->data, avpkt->size); |
||
| 410 | } else if (chunk_id == HNM4_CHUNK_ID_IZ) { |
||
| 411 | if (avpkt->size < 12) { |
||
| 412 | av_log(avctx, AV_LOG_ERROR, "packet too small\n"); |
||
| 413 | return AVERROR_INVALIDDATA; |
||
| 414 | } |
||
| 415 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
||
| 416 | return ret; |
||
| 417 | |||
| 418 | unpack_intraframe(avctx, avpkt->data + 12, avpkt->size - 12); |
||
| 419 | memcpy(hnm->previous, hnm->current, hnm->width * hnm->height); |
||
| 420 | if (hnm->version == 0x4a) |
||
| 421 | memcpy(hnm->processed, hnm->current, hnm->width * hnm->height); |
||
| 422 | else |
||
| 423 | postprocess_current_frame(avctx); |
||
| 424 | copy_processed_frame(avctx, frame); |
||
| 425 | frame->pict_type = AV_PICTURE_TYPE_I; |
||
| 426 | frame->key_frame = 1; |
||
| 427 | memcpy(frame->data[1], hnm->palette, 256 * 4); |
||
| 428 | *got_frame = 1; |
||
| 429 | } else if (chunk_id == HNM4_CHUNK_ID_IU) { |
||
| 430 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
||
| 431 | return ret; |
||
| 432 | |||
| 433 | if (hnm->version == 0x4a) { |
||
| 434 | decode_interframe_v4a(avctx, avpkt->data + 8, avpkt->size - 8); |
||
| 435 | memcpy(hnm->processed, hnm->current, hnm->width * hnm->height); |
||
| 436 | } else { |
||
| 437 | decode_interframe_v4(avctx, avpkt->data + 8, avpkt->size - 8); |
||
| 438 | postprocess_current_frame(avctx); |
||
| 439 | } |
||
| 440 | copy_processed_frame(avctx, frame); |
||
| 441 | frame->pict_type = AV_PICTURE_TYPE_P; |
||
| 442 | frame->key_frame = 0; |
||
| 443 | memcpy(frame->data[1], hnm->palette, 256 * 4); |
||
| 444 | *got_frame = 1; |
||
| 445 | hnm_flip_buffers(hnm); |
||
| 446 | } else { |
||
| 447 | av_log(avctx, AV_LOG_ERROR, "invalid chunk id: %d\n", chunk_id); |
||
| 448 | return AVERROR_INVALIDDATA; |
||
| 449 | } |
||
| 450 | |||
| 451 | return avpkt->size; |
||
| 452 | } |
||
| 453 | |||
| 454 | static av_cold int hnm_decode_init(AVCodecContext *avctx) |
||
| 455 | { |
||
| 456 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 457 | int ret; |
||
| 458 | |||
| 459 | if (avctx->extradata_size < 1) { |
||
| 460 | av_log(avctx, AV_LOG_ERROR, |
||
| 461 | "Extradata missing, decoder requires version number\n"); |
||
| 462 | return AVERROR_INVALIDDATA; |
||
| 463 | } |
||
| 464 | |||
| 465 | ret = av_image_check_size(avctx->width, avctx->height, 0, avctx); |
||
| 466 | if (ret < 0) |
||
| 467 | return ret; |
||
| 468 | |||
| 469 | hnm->version = avctx->extradata[0]; |
||
| 470 | avctx->pix_fmt = AV_PIX_FMT_PAL8; |
||
| 471 | hnm->width = avctx->width; |
||
| 472 | hnm->height = avctx->height; |
||
| 473 | hnm->buffer1 = av_mallocz(avctx->width * avctx->height); |
||
| 474 | hnm->buffer2 = av_mallocz(avctx->width * avctx->height); |
||
| 475 | hnm->processed = av_mallocz(avctx->width * avctx->height); |
||
| 476 | |||
| 477 | if ( !hnm->buffer1 || !hnm->buffer2 || !hnm->processed |
||
| 478 | || avctx->width * avctx->height == 0 |
||
| 479 | || avctx->height % 2) { |
||
| 480 | av_log(avctx, AV_LOG_ERROR, "av_mallocz() failed\n"); |
||
| 481 | av_freep(&hnm->buffer1); |
||
| 482 | av_freep(&hnm->buffer2); |
||
| 483 | av_freep(&hnm->processed); |
||
| 484 | return AVERROR(ENOMEM); |
||
| 485 | } |
||
| 486 | |||
| 487 | hnm->current = hnm->buffer1; |
||
| 488 | hnm->previous = hnm->buffer2; |
||
| 489 | |||
| 490 | return 0; |
||
| 491 | } |
||
| 492 | |||
| 493 | static av_cold int hnm_decode_end(AVCodecContext *avctx) |
||
| 494 | { |
||
| 495 | Hnm4VideoContext *hnm = avctx->priv_data; |
||
| 496 | |||
| 497 | av_freep(&hnm->buffer1); |
||
| 498 | av_freep(&hnm->buffer2); |
||
| 499 | av_freep(&hnm->processed); |
||
| 500 | |||
| 501 | return 0; |
||
| 502 | } |
||
| 503 | |||
| 504 | AVCodec ff_hnm4_video_decoder = { |
||
| 505 | .name = "hnm4video", |
||
| 506 | .long_name = NULL_IF_CONFIG_SMALL("HNM 4 video"), |
||
| 507 | .type = AVMEDIA_TYPE_VIDEO, |
||
| 508 | .id = AV_CODEC_ID_HNM4_VIDEO, |
||
| 509 | .priv_data_size = sizeof(Hnm4VideoContext), |
||
| 510 | .init = hnm_decode_init, |
||
| 511 | .close = hnm_decode_end, |
||
| 512 | .decode = hnm_decode_frame, |
||
| 513 | .capabilities = AV_CODEC_CAP_DR1, |
||
| 514 | }; |