| 1 | /* |
| 2 | * VC3/DNxHD decoder. |
| 3 | * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> |
| 4 | * Copyright (c) 2011 MirriAd Ltd |
| 5 | * |
| 6 | * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com> |
| 7 | * |
| 8 | * This file is part of FFmpeg. |
| 9 | * |
| 10 | * FFmpeg is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU Lesser General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2.1 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * FFmpeg is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * Lesser General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU Lesser General Public |
| 21 | * License along with FFmpeg; if not, write to the Free Software |
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 23 | */ |
| 24 | |
| 25 | #include "libavutil/imgutils.h" |
| 26 | #include "libavutil/timer.h" |
| 27 | #include "avcodec.h" |
| 28 | #include "blockdsp.h" |
| 29 | #include "get_bits.h" |
| 30 | #include "dnxhddata.h" |
| 31 | #include "idctdsp.h" |
| 32 | #include "internal.h" |
| 33 | #include "thread.h" |
| 34 | |
| 35 | typedef struct DNXHDContext { |
| 36 | AVCodecContext *avctx; |
| 37 | GetBitContext gb; |
| 38 | BlockDSPContext bdsp; |
| 39 | int64_t cid; ///< compression id |
| 40 | unsigned int width, height; |
| 41 | enum AVPixelFormat pix_fmt; |
| 42 | unsigned int mb_width, mb_height; |
| 43 | uint32_t mb_scan_index[68]; /* max for 1080p */ |
| 44 | int cur_field; ///< current interlaced field |
| 45 | VLC ac_vlc, dc_vlc, run_vlc; |
| 46 | int last_dc[3]; |
| 47 | IDCTDSPContext idsp; |
| 48 | DECLARE_ALIGNED(16, int16_t, blocks)[12][64]; |
| 49 | ScanTable scantable; |
| 50 | const CIDEntry *cid_table; |
| 51 | int bit_depth; // 8, 10 or 0 if not initialized at all. |
| 52 | int is_444; |
| 53 | void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block, |
| 54 | int n, int qscale); |
| 55 | int last_qscale; |
| 56 | int luma_scale[64]; |
| 57 | int chroma_scale[64]; |
| 58 | } DNXHDContext; |
| 59 | |
| 60 | #define DNXHD_VLC_BITS 9 |
| 61 | #define DNXHD_DC_VLC_BITS 7 |
| 62 | |
| 63 | static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block, |
| 64 | int n, int qscale); |
| 65 | static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block, |
| 66 | int n, int qscale); |
| 67 | static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block, |
| 68 | int n, int qscale); |
| 69 | |
| 70 | static av_cold int dnxhd_decode_init(AVCodecContext *avctx) |
| 71 | { |
| 72 | DNXHDContext *ctx = avctx->priv_data; |
| 73 | |
| 74 | ctx->avctx = avctx; |
| 75 | ctx->cid = -1; |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid) |
| 80 | { |
| 81 | if (cid != ctx->cid) { |
| 82 | int index; |
| 83 | |
| 84 | if ((index = ff_dnxhd_get_cid_table(cid)) < 0) { |
| 85 | av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid); |
| 86 | return AVERROR(ENOSYS); |
| 87 | } |
| 88 | if (ff_dnxhd_cid_table[index].bit_depth != ctx->bit_depth) { |
| 89 | av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, ctx->bit_depth); |
| 90 | return AVERROR_INVALIDDATA; |
| 91 | } |
| 92 | ctx->cid_table = &ff_dnxhd_cid_table[index]; |
| 93 | |
| 94 | ff_free_vlc(&ctx->ac_vlc); |
| 95 | ff_free_vlc(&ctx->dc_vlc); |
| 96 | ff_free_vlc(&ctx->run_vlc); |
| 97 | |
| 98 | init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257, |
| 99 | ctx->cid_table->ac_bits, 1, 1, |
| 100 | ctx->cid_table->ac_codes, 2, 2, 0); |
| 101 | init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->bit_depth + 4, |
| 102 | ctx->cid_table->dc_bits, 1, 1, |
| 103 | ctx->cid_table->dc_codes, 1, 1, 0); |
| 104 | init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62, |
| 105 | ctx->cid_table->run_bits, 1, 1, |
| 106 | ctx->cid_table->run_codes, 2, 2, 0); |
| 107 | |
| 108 | ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable, |
| 109 | ff_zigzag_direct); |
| 110 | ctx->cid = cid; |
| 111 | } |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, |
| 116 | const uint8_t *buf, int buf_size, |
| 117 | int first_field) |
| 118 | { |
| 119 | static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 }; |
| 120 | static const uint8_t header_prefix444[] = { 0x00, 0x00, 0x02, 0x80, 0x02 }; |
| 121 | int i, cid, ret; |
| 122 | |
| 123 | if (buf_size < 0x280) |
| 124 | return AVERROR_INVALIDDATA; |
| 125 | |
| 126 | if (memcmp(buf, header_prefix, 5) && memcmp(buf, header_prefix444, 5)) { |
| 127 | av_log(ctx->avctx, AV_LOG_ERROR, "error in header\n"); |
| 128 | return AVERROR_INVALIDDATA; |
| 129 | } |
| 130 | if (buf[5] & 2) { /* interlaced */ |
| 131 | ctx->cur_field = buf[5] & 1; |
| 132 | frame->interlaced_frame = 1; |
| 133 | frame->top_field_first = first_field ^ ctx->cur_field; |
| 134 | av_log(ctx->avctx, AV_LOG_DEBUG, |
| 135 | "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field); |
| 136 | } |
| 137 | |
| 138 | ctx->height = AV_RB16(buf + 0x18); |
| 139 | ctx->width = AV_RB16(buf + 0x1a); |
| 140 | |
| 141 | av_dlog(ctx->avctx, "width %d, height %d\n", ctx->width, ctx->height); |
| 142 | |
| 143 | ctx->is_444 = 0; |
| 144 | if (buf[0x4] == 0x2) { |
| 145 | ctx->pix_fmt = AV_PIX_FMT_YUV444P10; |
| 146 | ctx->avctx->bits_per_raw_sample = 10; |
| 147 | if (ctx->bit_depth != 10) { |
| 148 | ff_blockdsp_init(&ctx->bdsp, ctx->avctx); |
| 149 | ff_idctdsp_init(&ctx->idsp, ctx->avctx); |
| 150 | ctx->bit_depth = 10; |
| 151 | ctx->decode_dct_block = dnxhd_decode_dct_block_10_444; |
| 152 | } |
| 153 | ctx->is_444 = 1; |
| 154 | } else if (buf[0x21] & 0x40) { |
| 155 | ctx->pix_fmt = AV_PIX_FMT_YUV422P10; |
| 156 | ctx->avctx->bits_per_raw_sample = 10; |
| 157 | if (ctx->bit_depth != 10) { |
| 158 | ff_blockdsp_init(&ctx->bdsp, ctx->avctx); |
| 159 | ff_idctdsp_init(&ctx->idsp, ctx->avctx); |
| 160 | ctx->bit_depth = 10; |
| 161 | ctx->decode_dct_block = dnxhd_decode_dct_block_10; |
| 162 | } |
| 163 | } else { |
| 164 | ctx->pix_fmt = AV_PIX_FMT_YUV422P; |
| 165 | ctx->avctx->bits_per_raw_sample = 8; |
| 166 | if (ctx->bit_depth != 8) { |
| 167 | ff_blockdsp_init(&ctx->bdsp, ctx->avctx); |
| 168 | ff_idctdsp_init(&ctx->idsp, ctx->avctx); |
| 169 | ctx->bit_depth = 8; |
| 170 | ctx->decode_dct_block = dnxhd_decode_dct_block_8; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | cid = AV_RB32(buf + 0x28); |
| 175 | av_dlog(ctx->avctx, "compression id %d\n", cid); |
| 176 | |
| 177 | if ((ret = dnxhd_init_vlc(ctx, cid)) < 0) |
| 178 | return ret; |
| 179 | |
| 180 | if (buf_size < ctx->cid_table->coding_unit_size) { |
| 181 | av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size\n"); |
| 182 | return AVERROR_INVALIDDATA; |
| 183 | } |
| 184 | |
| 185 | ctx->mb_width = ctx->width >> 4; |
| 186 | ctx->mb_height = buf[0x16d]; |
| 187 | |
| 188 | av_dlog(ctx->avctx, |
| 189 | "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height); |
| 190 | |
| 191 | if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame) |
| 192 | ctx->height <<= 1; |
| 193 | |
| 194 | if (ctx->mb_height > 68 || |
| 195 | (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) { |
| 196 | av_log(ctx->avctx, AV_LOG_ERROR, |
| 197 | "mb height too big: %d\n", ctx->mb_height); |
| 198 | return AVERROR_INVALIDDATA; |
| 199 | } |
| 200 | |
| 201 | for (i = 0; i < ctx->mb_height; i++) { |
| 202 | ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2)); |
| 203 | av_dlog(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]); |
| 204 | if (buf_size < ctx->mb_scan_index[i] + 0x280LL) { |
| 205 | av_log(ctx->avctx, AV_LOG_ERROR, "invalid mb scan index\n"); |
| 206 | return AVERROR_INVALIDDATA; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | static av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx, |
| 214 | int16_t *block, int n, |
| 215 | int qscale, |
| 216 | int index_bits, |
| 217 | int level_bias, |
| 218 | int level_shift) |
| 219 | { |
| 220 | int i, j, index1, index2, len, flags; |
| 221 | int level, component, sign; |
| 222 | const int *scale; |
| 223 | const uint8_t *weight_matrix; |
| 224 | const uint8_t *ac_level = ctx->cid_table->ac_level; |
| 225 | const uint8_t *ac_flags = ctx->cid_table->ac_flags; |
| 226 | const int eob_index = ctx->cid_table->eob_index; |
| 227 | OPEN_READER(bs, &ctx->gb); |
| 228 | |
| 229 | if (!ctx->is_444) { |
| 230 | if (n & 2) { |
| 231 | component = 1 + (n & 1); |
| 232 | scale = ctx->chroma_scale; |
| 233 | weight_matrix = ctx->cid_table->chroma_weight; |
| 234 | } else { |
| 235 | component = 0; |
| 236 | scale = ctx->luma_scale; |
| 237 | weight_matrix = ctx->cid_table->luma_weight; |
| 238 | } |
| 239 | } else { |
| 240 | component = (n >> 1) % 3; |
| 241 | if (component) { |
| 242 | scale = ctx->chroma_scale; |
| 243 | weight_matrix = ctx->cid_table->chroma_weight; |
| 244 | } else { |
| 245 | scale = ctx->luma_scale; |
| 246 | weight_matrix = ctx->cid_table->luma_weight; |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | UPDATE_CACHE(bs, &ctx->gb); |
| 251 | GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1); |
| 252 | if (len) { |
| 253 | level = GET_CACHE(bs, &ctx->gb); |
| 254 | LAST_SKIP_BITS(bs, &ctx->gb, len); |
| 255 | sign = ~level >> 31; |
| 256 | level = (NEG_USR32(sign ^ level, len) ^ sign) - sign; |
| 257 | ctx->last_dc[component] += level; |
| 258 | } |
| 259 | block[0] = ctx->last_dc[component]; |
| 260 | |
| 261 | i = 0; |
| 262 | |
| 263 | UPDATE_CACHE(bs, &ctx->gb); |
| 264 | GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table, |
| 265 | DNXHD_VLC_BITS, 2); |
| 266 | |
| 267 | while (index1 != eob_index) { |
| 268 | level = ac_level[index1]; |
| 269 | flags = ac_flags[index1]; |
| 270 | |
| 271 | sign = SHOW_SBITS(bs, &ctx->gb, 1); |
| 272 | SKIP_BITS(bs, &ctx->gb, 1); |
| 273 | |
| 274 | if (flags & 1) { |
| 275 | level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 7; |
| 276 | SKIP_BITS(bs, &ctx->gb, index_bits); |
| 277 | } |
| 278 | |
| 279 | if (flags & 2) { |
| 280 | UPDATE_CACHE(bs, &ctx->gb); |
| 281 | GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table, |
| 282 | DNXHD_VLC_BITS, 2); |
| 283 | i += ctx->cid_table->run[index2]; |
| 284 | } |
| 285 | |
| 286 | if (++i > 63) { |
| 287 | av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i); |
| 288 | break; |
| 289 | } |
| 290 | |
| 291 | j = ctx->scantable.permutated[i]; |
| 292 | level *= scale[i]; |
| 293 | if (level_bias < 32 || weight_matrix[i] != level_bias) |
| 294 | level += level_bias; |
| 295 | level >>= level_shift; |
| 296 | |
| 297 | block[j] = (level ^ sign) - sign; |
| 298 | |
| 299 | UPDATE_CACHE(bs, &ctx->gb); |
| 300 | GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table, |
| 301 | DNXHD_VLC_BITS, 2); |
| 302 | } |
| 303 | |
| 304 | CLOSE_READER(bs, &ctx->gb); |
| 305 | } |
| 306 | |
| 307 | static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block, |
| 308 | int n, int qscale) |
| 309 | { |
| 310 | dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6); |
| 311 | } |
| 312 | |
| 313 | static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block, |
| 314 | int n, int qscale) |
| 315 | { |
| 316 | dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4); |
| 317 | } |
| 318 | |
| 319 | static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block, |
| 320 | int n, int qscale) |
| 321 | { |
| 322 | dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 32, 6); |
| 323 | } |
| 324 | |
| 325 | static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame, |
| 326 | int x, int y) |
| 327 | { |
| 328 | int shift1 = ctx->bit_depth == 10; |
| 329 | int dct_linesize_luma = frame->linesize[0]; |
| 330 | int dct_linesize_chroma = frame->linesize[1]; |
| 331 | uint8_t *dest_y, *dest_u, *dest_v; |
| 332 | int dct_y_offset, dct_x_offset; |
| 333 | int qscale, i; |
| 334 | |
| 335 | qscale = get_bits(&ctx->gb, 11); |
| 336 | skip_bits1(&ctx->gb); |
| 337 | |
| 338 | if (qscale != ctx->last_qscale) { |
| 339 | for (i = 0; i < 64; i++) { |
| 340 | ctx->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i]; |
| 341 | ctx->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i]; |
| 342 | } |
| 343 | ctx->last_qscale = qscale; |
| 344 | } |
| 345 | |
| 346 | for (i = 0; i < 8; i++) { |
| 347 | ctx->bdsp.clear_block(ctx->blocks[i]); |
| 348 | ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale); |
| 349 | } |
| 350 | if (ctx->is_444) { |
| 351 | for (; i < 12; i++) { |
| 352 | ctx->bdsp.clear_block(ctx->blocks[i]); |
| 353 | ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | if (frame->interlaced_frame) { |
| 358 | dct_linesize_luma <<= 1; |
| 359 | dct_linesize_chroma <<= 1; |
| 360 | } |
| 361 | |
| 362 | dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1)); |
| 363 | dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444)); |
| 364 | dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444)); |
| 365 | |
| 366 | if (ctx->cur_field) { |
| 367 | dest_y += frame->linesize[0]; |
| 368 | dest_u += frame->linesize[1]; |
| 369 | dest_v += frame->linesize[2]; |
| 370 | } |
| 371 | |
| 372 | dct_y_offset = dct_linesize_luma << 3; |
| 373 | dct_x_offset = 8 << shift1; |
| 374 | if (!ctx->is_444) { |
| 375 | ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]); |
| 376 | ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]); |
| 377 | ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]); |
| 378 | ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]); |
| 379 | |
| 380 | if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) { |
| 381 | dct_y_offset = dct_linesize_chroma << 3; |
| 382 | ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]); |
| 383 | ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]); |
| 384 | ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]); |
| 385 | ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]); |
| 386 | } |
| 387 | } else { |
| 388 | ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]); |
| 389 | ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]); |
| 390 | ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[6]); |
| 391 | ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[7]); |
| 392 | |
| 393 | if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) { |
| 394 | dct_y_offset = dct_linesize_chroma << 3; |
| 395 | ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]); |
| 396 | ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, ctx->blocks[3]); |
| 397 | ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[8]); |
| 398 | ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[9]); |
| 399 | ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[4]); |
| 400 | ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, ctx->blocks[5]); |
| 401 | ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[10]); |
| 402 | ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[11]); |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame, |
| 410 | const uint8_t *buf, int buf_size) |
| 411 | { |
| 412 | int x, y; |
| 413 | for (y = 0; y < ctx->mb_height; y++) { |
| 414 | ctx->last_dc[0] = |
| 415 | ctx->last_dc[1] = |
| 416 | ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1) |
| 417 | init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3); |
| 418 | for (x = 0; x < ctx->mb_width; x++) { |
| 419 | //START_TIMER; |
| 420 | dnxhd_decode_macroblock(ctx, frame, x, y); |
| 421 | //STOP_TIMER("decode macroblock"); |
| 422 | } |
| 423 | } |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, |
| 428 | int *got_frame, AVPacket *avpkt) |
| 429 | { |
| 430 | const uint8_t *buf = avpkt->data; |
| 431 | int buf_size = avpkt->size; |
| 432 | DNXHDContext *ctx = avctx->priv_data; |
| 433 | ThreadFrame frame = { .f = data }; |
| 434 | AVFrame *picture = data; |
| 435 | int first_field = 1; |
| 436 | int ret; |
| 437 | |
| 438 | av_dlog(avctx, "frame size %d\n", buf_size); |
| 439 | |
| 440 | decode_coding_unit: |
| 441 | if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0) |
| 442 | return ret; |
| 443 | |
| 444 | if ((avctx->width || avctx->height) && |
| 445 | (ctx->width != avctx->width || ctx->height != avctx->height)) { |
| 446 | av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n", |
| 447 | avctx->width, avctx->height, ctx->width, ctx->height); |
| 448 | first_field = 1; |
| 449 | } |
| 450 | if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) { |
| 451 | av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n", |
| 452 | av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt)); |
| 453 | first_field = 1; |
| 454 | } |
| 455 | |
| 456 | avctx->pix_fmt = ctx->pix_fmt; |
| 457 | ret = ff_set_dimensions(avctx, ctx->width, ctx->height); |
| 458 | if (ret < 0) |
| 459 | return ret; |
| 460 | |
| 461 | if (first_field) { |
| 462 | if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) |
| 463 | return ret; |
| 464 | picture->pict_type = AV_PICTURE_TYPE_I; |
| 465 | picture->key_frame = 1; |
| 466 | } |
| 467 | |
| 468 | dnxhd_decode_macroblocks(ctx, picture, buf + 0x280, buf_size - 0x280); |
| 469 | |
| 470 | if (first_field && picture->interlaced_frame) { |
| 471 | buf += ctx->cid_table->coding_unit_size; |
| 472 | buf_size -= ctx->cid_table->coding_unit_size; |
| 473 | first_field = 0; |
| 474 | goto decode_coding_unit; |
| 475 | } |
| 476 | |
| 477 | *got_frame = 1; |
| 478 | return avpkt->size; |
| 479 | } |
| 480 | |
| 481 | static av_cold int dnxhd_decode_close(AVCodecContext *avctx) |
| 482 | { |
| 483 | DNXHDContext *ctx = avctx->priv_data; |
| 484 | |
| 485 | ff_free_vlc(&ctx->ac_vlc); |
| 486 | ff_free_vlc(&ctx->dc_vlc); |
| 487 | ff_free_vlc(&ctx->run_vlc); |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | AVCodec ff_dnxhd_decoder = { |
| 492 | .name = "dnxhd", |
| 493 | .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"), |
| 494 | .type = AVMEDIA_TYPE_VIDEO, |
| 495 | .id = AV_CODEC_ID_DNXHD, |
| 496 | .priv_data_size = sizeof(DNXHDContext), |
| 497 | .init = dnxhd_decode_init, |
| 498 | .close = dnxhd_decode_close, |
| 499 | .decode = dnxhd_decode_frame, |
| 500 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, |
| 501 | }; |