| 1 | /* |
| 2 | * Copyright (C) 2005 Ole André Vadla Ravnås <oleavr@gmail.com> |
| 3 | * Copyright (C) 2008 Ramiro Polla |
| 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 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <stdint.h> |
| 25 | |
| 26 | #include "avcodec.h" |
| 27 | #include "blockdsp.h" |
| 28 | #include "internal.h" |
| 29 | #include "get_bits.h" |
| 30 | #include "bytestream.h" |
| 31 | #include "bswapdsp.h" |
| 32 | #include "hpeldsp.h" |
| 33 | #include "idctdsp.h" |
| 34 | #include "thread.h" |
| 35 | |
| 36 | #define MIMIC_HEADER_SIZE 20 |
| 37 | |
| 38 | typedef struct { |
| 39 | AVCodecContext *avctx; |
| 40 | |
| 41 | int num_vblocks[3]; |
| 42 | int num_hblocks[3]; |
| 43 | |
| 44 | void *swap_buf; |
| 45 | int swap_buf_size; |
| 46 | |
| 47 | int cur_index; |
| 48 | int prev_index; |
| 49 | |
| 50 | ThreadFrame frames [16]; |
| 51 | AVPicture flipped_ptrs[16]; |
| 52 | |
| 53 | DECLARE_ALIGNED(16, int16_t, dct_block)[64]; |
| 54 | |
| 55 | GetBitContext gb; |
| 56 | ScanTable scantable; |
| 57 | BlockDSPContext bdsp; |
| 58 | BswapDSPContext bbdsp; |
| 59 | HpelDSPContext hdsp; |
| 60 | IDCTDSPContext idsp; |
| 61 | VLC vlc; |
| 62 | |
| 63 | /* Kept in the context so multithreading can have a constant to read from */ |
| 64 | int next_cur_index; |
| 65 | int next_prev_index; |
| 66 | } MimicContext; |
| 67 | |
| 68 | static const uint32_t huffcodes[] = { |
| 69 | 0x0000000a, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, |
| 70 | 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, |
| 71 | 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x0000000b, |
| 72 | 0x0000001b, 0x00000038, 0x00000078, 0x00000079, 0x0000007a, 0x000000f9, |
| 73 | 0x000000fa, 0x000003fb, 0x000007f8, 0x000007f9, 0x000007fa, 0x000007fb, |
| 74 | 0x00000ff8, 0x00000ff9, 0x00000001, 0x00000039, 0x0000007b, 0x000000fb, |
| 75 | 0x000001f8, 0x000001f9, 0x00000ffa, 0x00000ffb, 0x00001ff8, 0x00001ff9, |
| 76 | 0x00001ffa, 0x00001ffb, 0x00003ff8, 0x00003ff9, 0x00003ffa, 0x00000000, |
| 77 | 0x00000004, 0x0000003a, 0x000001fa, 0x00003ffb, 0x00007ff8, 0x00007ff9, |
| 78 | 0x00007ffa, 0x00007ffb, 0x0000fff8, 0x0000fff9, 0x0000fffa, 0x0000fffb, |
| 79 | 0x0001fff8, 0x0001fff9, 0x0001fffa, 0x00000000, 0x0000000c, 0x000000f8, |
| 80 | 0x000001fb, 0x0001fffb, 0x0003fff8, 0x0003fff9, 0x0003fffa, 0x0003fffb, |
| 81 | 0x0007fff8, 0x0007fff9, 0x0007fffa, 0x0007fffb, 0x000ffff8, 0x000ffff9, |
| 82 | 0x000ffffa, 0x00000000, 0x0000001a, 0x000003f8, 0x000ffffb, 0x001ffff8, |
| 83 | 0x001ffff9, 0x001ffffa, 0x001ffffb, 0x003ffff8, 0x003ffff9, 0x003ffffa, |
| 84 | 0x003ffffb, 0x007ffff8, 0x007ffff9, 0x007ffffa, 0x007ffffb, 0x00000000, |
| 85 | 0x0000003b, 0x000003f9, 0x00fffff8, 0x00fffff9, 0x00fffffa, 0x00fffffb, |
| 86 | 0x01fffff8, 0x01fffff9, 0x01fffffa, 0x01fffffb, 0x03fffff8, 0x03fffff9, |
| 87 | 0x03fffffa, 0x03fffffb, 0x07fffff8, 0x00000000, 0x000003fa, 0x07fffff9, |
| 88 | 0x07fffffa, 0x07fffffb, 0x0ffffff8, 0x0ffffff9, 0x0ffffffa, 0x0ffffffb, |
| 89 | 0x1ffffff8, 0x1ffffff9, 0x1ffffffa, 0x1ffffffb, 0x3ffffff8, 0x3ffffff9, |
| 90 | 0x3ffffffa, |
| 91 | }; |
| 92 | |
| 93 | static const uint8_t huffbits[] = { |
| 94 | 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 95 | 0, 0, 0, 0, 2, 4, 5, 6, 7, 7, 7, 8, |
| 96 | 8, 10, 11, 11, 11, 11, 12, 12, 2, 6, 7, 8, |
| 97 | 9, 9, 12, 12, 13, 13, 13, 13, 14, 14, 14, 0, |
| 98 | 3, 6, 9, 14, 15, 15, 15, 15, 16, 16, 16, 16, |
| 99 | 17, 17, 17, 0, 4, 8, 9, 17, 18, 18, 18, 18, |
| 100 | 19, 19, 19, 19, 20, 20, 20, 0, 5, 10, 20, 21, |
| 101 | 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 0, |
| 102 | 6, 10, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, |
| 103 | 26, 26, 27, 0, 10, 27, 27, 27, 28, 28, 28, 28, |
| 104 | 29, 29, 29, 29, 30, 30, 30, |
| 105 | }; |
| 106 | |
| 107 | static const uint8_t col_zag[64] = { |
| 108 | 0, 8, 1, 2, 9, 16, 24, 17, |
| 109 | 10, 3, 4, 11, 18, 25, 32, 40, |
| 110 | 33, 26, 19, 12, 5, 6, 13, 20, |
| 111 | 27, 34, 41, 48, 56, 49, 42, 35, |
| 112 | 28, 21, 14, 7, 15, 22, 29, 36, |
| 113 | 43, 50, 57, 58, 51, 44, 37, 30, |
| 114 | 23, 31, 38, 45, 52, 59, 39, 46, |
| 115 | 53, 60, 61, 54, 47, 55, 62, 63, |
| 116 | }; |
| 117 | |
| 118 | static av_cold int mimic_decode_end(AVCodecContext *avctx) |
| 119 | { |
| 120 | MimicContext *ctx = avctx->priv_data; |
| 121 | int i; |
| 122 | |
| 123 | av_freep(&ctx->swap_buf); |
| 124 | ctx->swap_buf_size = 0; |
| 125 | |
| 126 | for (i = 0; i < FF_ARRAY_ELEMS(ctx->frames); i++) { |
| 127 | if (ctx->frames[i].f) |
| 128 | ff_thread_release_buffer(avctx, &ctx->frames[i]); |
| 129 | av_frame_free(&ctx->frames[i].f); |
| 130 | } |
| 131 | |
| 132 | if (!avctx->internal->is_copy) |
| 133 | ff_free_vlc(&ctx->vlc); |
| 134 | |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | static av_cold int mimic_decode_init(AVCodecContext *avctx) |
| 139 | { |
| 140 | MimicContext *ctx = avctx->priv_data; |
| 141 | int ret, i; |
| 142 | |
| 143 | avctx->internal->allocate_progress = 1; |
| 144 | |
| 145 | ctx->prev_index = 0; |
| 146 | ctx->cur_index = 15; |
| 147 | |
| 148 | if ((ret = init_vlc(&ctx->vlc, 11, FF_ARRAY_ELEMS(huffbits), |
| 149 | huffbits, 1, 1, huffcodes, 4, 4, 0)) < 0) { |
| 150 | av_log(avctx, AV_LOG_ERROR, "error initializing vlc table\n"); |
| 151 | return ret; |
| 152 | } |
| 153 | ff_blockdsp_init(&ctx->bdsp, avctx); |
| 154 | ff_bswapdsp_init(&ctx->bbdsp); |
| 155 | ff_hpeldsp_init(&ctx->hdsp, avctx->flags); |
| 156 | ff_idctdsp_init(&ctx->idsp, avctx); |
| 157 | ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable, col_zag); |
| 158 | |
| 159 | for (i = 0; i < FF_ARRAY_ELEMS(ctx->frames); i++) { |
| 160 | ctx->frames[i].f = av_frame_alloc(); |
| 161 | if (!ctx->frames[i].f) { |
| 162 | mimic_decode_end(avctx); |
| 163 | return AVERROR(ENOMEM); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | static int mimic_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from) |
| 171 | { |
| 172 | MimicContext *dst = avctx->priv_data, *src = avctx_from->priv_data; |
| 173 | int i, ret; |
| 174 | |
| 175 | if (avctx == avctx_from) |
| 176 | return 0; |
| 177 | |
| 178 | dst->cur_index = src->next_cur_index; |
| 179 | dst->prev_index = src->next_prev_index; |
| 180 | |
| 181 | memcpy(dst->flipped_ptrs, src->flipped_ptrs, sizeof(src->flipped_ptrs)); |
| 182 | |
| 183 | for (i = 0; i < FF_ARRAY_ELEMS(dst->frames); i++) { |
| 184 | ff_thread_release_buffer(avctx, &dst->frames[i]); |
| 185 | if (i != src->next_cur_index && src->frames[i].f->data[0]) { |
| 186 | ret = ff_thread_ref_frame(&dst->frames[i], &src->frames[i]); |
| 187 | if (ret < 0) |
| 188 | return ret; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | static const int8_t vlcdec_lookup[9][64] = { |
| 196 | { 0, }, |
| 197 | { -1, 1, }, |
| 198 | { -3, 3, -2, 2, }, |
| 199 | { -7, 7, -6, 6, -5, 5, -4, 4, }, |
| 200 | { -15, 15, -14, 14, -13, 13, -12, 12, |
| 201 | -11, 11, -10, 10, -9, 9, -8, 8, }, |
| 202 | { -31, 31, -30, 30, -29, 29, -28, 28, |
| 203 | -27, 27, -26, 26, -25, 25, -24, 24, |
| 204 | -23, 23, -22, 22, -21, 21, -20, 20, |
| 205 | -19, 19, -18, 18, -17, 17, -16, 16, }, |
| 206 | { -63, 63, -62, 62, -61, 61, -60, 60, |
| 207 | -59, 59, -58, 58, -57, 57, -56, 56, |
| 208 | -55, 55, -54, 54, -53, 53, -52, 52, |
| 209 | -51, 51, -50, 50, -49, 49, -48, 48, |
| 210 | -47, 47, -46, 46, -45, 45, -44, 44, |
| 211 | -43, 43, -42, 42, -41, 41, -40, 40, |
| 212 | -39, 39, -38, 38, -37, 37, -36, 36, |
| 213 | -35, 35, -34, 34, -33, 33, -32, 32, }, |
| 214 | { -127, 127, -126, 126, -125, 125, -124, 124, |
| 215 | -123, 123, -122, 122, -121, 121, -120, 120, |
| 216 | -119, 119, -118, 118, -117, 117, -116, 116, |
| 217 | -115, 115, -114, 114, -113, 113, -112, 112, |
| 218 | -111, 111, -110, 110, -109, 109, -108, 108, |
| 219 | -107, 107, -106, 106, -105, 105, -104, 104, |
| 220 | -103, 103, -102, 102, -101, 101, -100, 100, |
| 221 | -99, 99, -98, 98, -97, 97, -96, 96, }, |
| 222 | { -95, 95, -94, 94, -93, 93, -92, 92, |
| 223 | -91, 91, -90, 90, -89, 89, -88, 88, |
| 224 | -87, 87, -86, 86, -85, 85, -84, 84, |
| 225 | -83, 83, -82, 82, -81, 81, -80, 80, |
| 226 | -79, 79, -78, 78, -77, 77, -76, 76, |
| 227 | -75, 75, -74, 74, -73, 73, -72, 72, |
| 228 | -71, 71, -70, 70, -69, 69, -68, 68, |
| 229 | -67, 67, -66, 66, -65, 65, -64, 64, }, |
| 230 | }; |
| 231 | |
| 232 | static int vlc_decode_block(MimicContext *ctx, int num_coeffs, int qscale) |
| 233 | { |
| 234 | int16_t *block = ctx->dct_block; |
| 235 | unsigned int pos; |
| 236 | |
| 237 | ctx->bdsp.clear_block(block); |
| 238 | |
| 239 | block[0] = get_bits(&ctx->gb, 8) << 3; |
| 240 | |
| 241 | for (pos = 1; pos < num_coeffs; pos++) { |
| 242 | uint32_t vlc, num_bits; |
| 243 | int value; |
| 244 | int coeff; |
| 245 | |
| 246 | vlc = get_vlc2(&ctx->gb, ctx->vlc.table, ctx->vlc.bits, 3); |
| 247 | if (!vlc) /* end-of-block code */ |
| 248 | return 0; |
| 249 | if (vlc == -1) |
| 250 | return AVERROR_INVALIDDATA; |
| 251 | |
| 252 | /* pos_add and num_bits are coded in the vlc code */ |
| 253 | pos += vlc & 15; // pos_add |
| 254 | num_bits = vlc >> 4; // num_bits |
| 255 | |
| 256 | if (pos >= 64) |
| 257 | return AVERROR_INVALIDDATA; |
| 258 | |
| 259 | value = get_bits(&ctx->gb, num_bits); |
| 260 | |
| 261 | /* FFmpeg's IDCT behaves somewhat different from the original code, so |
| 262 | * a factor of 4 was added to the input */ |
| 263 | |
| 264 | coeff = vlcdec_lookup[num_bits][value]; |
| 265 | if (pos < 3) |
| 266 | coeff <<= 4; |
| 267 | else /* TODO Use >> 10 instead of / 1001 */ |
| 268 | coeff = (coeff * qscale) / 1001; |
| 269 | |
| 270 | block[ctx->scantable.permutated[pos]] = coeff; |
| 271 | } |
| 272 | |
| 273 | return 0; |
| 274 | } |
| 275 | |
| 276 | static int decode(MimicContext *ctx, int quality, int num_coeffs, |
| 277 | int is_iframe) |
| 278 | { |
| 279 | int ret, y, x, plane, cur_row = 0; |
| 280 | |
| 281 | for (plane = 0; plane < 3; plane++) { |
| 282 | const int is_chroma = !!plane; |
| 283 | const int qscale = av_clip(10000 - quality, is_chroma ? 1000 : 2000, |
| 284 | 10000) << 2; |
| 285 | const int stride = ctx->flipped_ptrs[ctx->cur_index ].linesize[plane]; |
| 286 | const uint8_t *src = ctx->flipped_ptrs[ctx->prev_index].data[plane]; |
| 287 | uint8_t *dst = ctx->flipped_ptrs[ctx->cur_index ].data[plane]; |
| 288 | |
| 289 | for (y = 0; y < ctx->num_vblocks[plane]; y++) { |
| 290 | for (x = 0; x < ctx->num_hblocks[plane]; x++) { |
| 291 | /* Check for a change condition in the current block. |
| 292 | * - iframes always change. |
| 293 | * - Luma plane changes on get_bits1 == 0 |
| 294 | * - Chroma planes change on get_bits1 == 1 */ |
| 295 | if (is_iframe || get_bits1(&ctx->gb) == is_chroma) { |
| 296 | /* Luma planes may use a backreference from the 15 last |
| 297 | * frames preceding the previous. (get_bits1 == 1) |
| 298 | * Chroma planes don't use backreferences. */ |
| 299 | if (is_chroma || is_iframe || !get_bits1(&ctx->gb)) { |
| 300 | if ((ret = vlc_decode_block(ctx, num_coeffs, |
| 301 | qscale)) < 0) { |
| 302 | av_log(ctx->avctx, AV_LOG_ERROR, "Error decoding " |
| 303 | "block.\n"); |
| 304 | return ret; |
| 305 | } |
| 306 | ctx->idsp.idct_put(dst, stride, ctx->dct_block); |
| 307 | } else { |
| 308 | unsigned int backref = get_bits(&ctx->gb, 4); |
| 309 | int index = (ctx->cur_index + backref) & 15; |
| 310 | uint8_t *p = ctx->flipped_ptrs[index].data[0]; |
| 311 | |
| 312 | if (index != ctx->cur_index && p) { |
| 313 | ff_thread_await_progress(&ctx->frames[index], |
| 314 | cur_row, 0); |
| 315 | p += src - |
| 316 | ctx->flipped_ptrs[ctx->prev_index].data[plane]; |
| 317 | ctx->hdsp.put_pixels_tab[1][0](dst, p, stride, 8); |
| 318 | } else { |
| 319 | av_log(ctx->avctx, AV_LOG_ERROR, |
| 320 | "No such backreference! Buggy sample.\n"); |
| 321 | } |
| 322 | } |
| 323 | } else { |
| 324 | ff_thread_await_progress(&ctx->frames[ctx->prev_index], |
| 325 | cur_row, 0); |
| 326 | ctx->hdsp.put_pixels_tab[1][0](dst, src, stride, 8); |
| 327 | } |
| 328 | src += 8; |
| 329 | dst += 8; |
| 330 | } |
| 331 | src += (stride - ctx->num_hblocks[plane]) << 3; |
| 332 | dst += (stride - ctx->num_hblocks[plane]) << 3; |
| 333 | |
| 334 | ff_thread_report_progress(&ctx->frames[ctx->cur_index], |
| 335 | cur_row++, 0); |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Flip the buffer upside-down and put it in the YVU order to match the |
| 344 | * way Mimic encodes frames. |
| 345 | */ |
| 346 | static void prepare_avpic(MimicContext *ctx, AVPicture *dst, AVFrame *src) |
| 347 | { |
| 348 | int i; |
| 349 | dst->data[0] = src->data[0] + ( ctx->avctx->height - 1) * src->linesize[0]; |
| 350 | dst->data[1] = src->data[2] + ((ctx->avctx->height >> 1) - 1) * src->linesize[2]; |
| 351 | dst->data[2] = src->data[1] + ((ctx->avctx->height >> 1) - 1) * src->linesize[1]; |
| 352 | for (i = 0; i < 3; i++) |
| 353 | dst->linesize[i] = -src->linesize[i]; |
| 354 | } |
| 355 | |
| 356 | static int mimic_decode_frame(AVCodecContext *avctx, void *data, |
| 357 | int *got_frame, AVPacket *avpkt) |
| 358 | { |
| 359 | const uint8_t *buf = avpkt->data; |
| 360 | int buf_size = avpkt->size; |
| 361 | int swap_buf_size = buf_size - MIMIC_HEADER_SIZE; |
| 362 | MimicContext *ctx = avctx->priv_data; |
| 363 | GetByteContext gb; |
| 364 | int is_pframe; |
| 365 | int width, height; |
| 366 | int quality, num_coeffs; |
| 367 | int res; |
| 368 | |
| 369 | if (buf_size <= MIMIC_HEADER_SIZE) { |
| 370 | av_log(avctx, AV_LOG_ERROR, "insufficient data\n"); |
| 371 | return AVERROR_INVALIDDATA; |
| 372 | } |
| 373 | |
| 374 | bytestream2_init(&gb, buf, MIMIC_HEADER_SIZE); |
| 375 | bytestream2_skip(&gb, 2); /* some constant (always 256) */ |
| 376 | quality = bytestream2_get_le16u(&gb); |
| 377 | width = bytestream2_get_le16u(&gb); |
| 378 | height = bytestream2_get_le16u(&gb); |
| 379 | bytestream2_skip(&gb, 4); /* some constant */ |
| 380 | is_pframe = bytestream2_get_le32u(&gb); |
| 381 | num_coeffs = bytestream2_get_byteu(&gb); |
| 382 | bytestream2_skip(&gb, 3); /* some constant */ |
| 383 | |
| 384 | if (!ctx->avctx) { |
| 385 | int i; |
| 386 | |
| 387 | if (!(width == 160 && height == 120) && |
| 388 | !(width == 320 && height == 240)) { |
| 389 | av_log(avctx, AV_LOG_ERROR, "invalid width/height!\n"); |
| 390 | return AVERROR_INVALIDDATA; |
| 391 | } |
| 392 | |
| 393 | ctx->avctx = avctx; |
| 394 | avctx->width = width; |
| 395 | avctx->height = height; |
| 396 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 397 | for (i = 0; i < 3; i++) { |
| 398 | ctx->num_vblocks[i] = FF_CEIL_RSHIFT(height, 3 + !!i); |
| 399 | ctx->num_hblocks[i] = width >> (3 + !!i); |
| 400 | } |
| 401 | } else if (width != ctx->avctx->width || height != ctx->avctx->height) { |
| 402 | avpriv_request_sample(avctx, "Resolution changing"); |
| 403 | return AVERROR_PATCHWELCOME; |
| 404 | } |
| 405 | |
| 406 | if (is_pframe && !ctx->frames[ctx->prev_index].f->data[0]) { |
| 407 | av_log(avctx, AV_LOG_ERROR, "decoding must start with keyframe\n"); |
| 408 | return AVERROR_INVALIDDATA; |
| 409 | } |
| 410 | |
| 411 | ff_thread_release_buffer(avctx, &ctx->frames[ctx->cur_index]); |
| 412 | ctx->frames[ctx->cur_index].f->pict_type = is_pframe ? AV_PICTURE_TYPE_P : |
| 413 | AV_PICTURE_TYPE_I; |
| 414 | if ((res = ff_thread_get_buffer(avctx, &ctx->frames[ctx->cur_index], |
| 415 | AV_GET_BUFFER_FLAG_REF)) < 0) |
| 416 | return res; |
| 417 | |
| 418 | ctx->next_prev_index = ctx->cur_index; |
| 419 | ctx->next_cur_index = (ctx->cur_index - 1) & 15; |
| 420 | |
| 421 | prepare_avpic(ctx, &ctx->flipped_ptrs[ctx->cur_index], |
| 422 | ctx->frames[ctx->cur_index].f); |
| 423 | |
| 424 | ff_thread_finish_setup(avctx); |
| 425 | |
| 426 | av_fast_padded_malloc(&ctx->swap_buf, &ctx->swap_buf_size, swap_buf_size); |
| 427 | if (!ctx->swap_buf) |
| 428 | return AVERROR(ENOMEM); |
| 429 | |
| 430 | ctx->bbdsp.bswap_buf(ctx->swap_buf, |
| 431 | (const uint32_t *) (buf + MIMIC_HEADER_SIZE), |
| 432 | swap_buf_size >> 2); |
| 433 | init_get_bits(&ctx->gb, ctx->swap_buf, swap_buf_size << 3); |
| 434 | |
| 435 | res = decode(ctx, quality, num_coeffs, !is_pframe); |
| 436 | ff_thread_report_progress(&ctx->frames[ctx->cur_index], INT_MAX, 0); |
| 437 | if (res < 0) { |
| 438 | if (!(avctx->active_thread_type & FF_THREAD_FRAME)) { |
| 439 | ff_thread_release_buffer(avctx, &ctx->frames[ctx->cur_index]); |
| 440 | return res; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | if ((res = av_frame_ref(data, ctx->frames[ctx->cur_index].f)) < 0) |
| 445 | return res; |
| 446 | *got_frame = 1; |
| 447 | |
| 448 | ctx->prev_index = ctx->next_prev_index; |
| 449 | ctx->cur_index = ctx->next_cur_index; |
| 450 | |
| 451 | /* Only release frames that aren't used for backreferences anymore */ |
| 452 | ff_thread_release_buffer(avctx, &ctx->frames[ctx->cur_index]); |
| 453 | |
| 454 | return buf_size; |
| 455 | } |
| 456 | |
| 457 | static av_cold int mimic_init_thread_copy(AVCodecContext *avctx) |
| 458 | { |
| 459 | MimicContext *ctx = avctx->priv_data; |
| 460 | int i; |
| 461 | |
| 462 | for (i = 0; i < FF_ARRAY_ELEMS(ctx->frames); i++) { |
| 463 | ctx->frames[i].f = av_frame_alloc(); |
| 464 | if (!ctx->frames[i].f) { |
| 465 | mimic_decode_end(avctx); |
| 466 | return AVERROR(ENOMEM); |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | return 0; |
| 471 | } |
| 472 | |
| 473 | AVCodec ff_mimic_decoder = { |
| 474 | .name = "mimic", |
| 475 | .long_name = NULL_IF_CONFIG_SMALL("Mimic"), |
| 476 | .type = AVMEDIA_TYPE_VIDEO, |
| 477 | .id = AV_CODEC_ID_MIMIC, |
| 478 | .priv_data_size = sizeof(MimicContext), |
| 479 | .init = mimic_decode_init, |
| 480 | .close = mimic_decode_end, |
| 481 | .decode = mimic_decode_frame, |
| 482 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, |
| 483 | .update_thread_context = ONLY_IF_THREADS_ENABLED(mimic_decode_update_thread_context), |
| 484 | .init_thread_copy = ONLY_IF_THREADS_ENABLED(mimic_init_thread_copy), |
| 485 | }; |