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 * Copyright (c) 2015 Christophe Gisquet
6 *
7 * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
8 * Slice multithreading and MB interlaced support added by Christophe Gisquet
9 *
10 * This file is part of FFmpeg.
11 *
12 * FFmpeg is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
15 * version 2.1 of the License, or (at your option) any later version.
16 *
17 * FFmpeg is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
21 *
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with FFmpeg; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 */
26
27 #include "libavutil/imgutils.h"
28 #include "libavutil/mem_internal.h"
29
30 #include "avcodec.h"
31 #include "blockdsp.h"
32 #include "codec_internal.h"
33 #define UNCHECKED_BITSTREAM_READER 1
34 #include "get_bits.h"
35 #include "dnxhddata.h"
36 #include "idctdsp.h"
37 #include "internal.h"
38 #include "profiles.h"
39 #include "thread.h"
40
41 typedef struct RowContext {
42 DECLARE_ALIGNED(32, int16_t, blocks)[12][64];
43 int luma_scale[64];
44 int chroma_scale[64];
45 GetBitContext gb;
46 int last_dc[3];
47 int last_qscale;
48 int errors;
49 /** -1:not set yet 0:off=RGB 1:on=YUV 2:variable */
50 int format;
51 } RowContext;
52
53 typedef struct DNXHDContext {
54 AVCodecContext *avctx;
55 RowContext *rows;
56 BlockDSPContext bdsp;
57 const uint8_t* buf;
58 int buf_size;
59 int64_t cid; ///< compression id
60 unsigned int width, height;
61 enum AVPixelFormat pix_fmt;
62 unsigned int mb_width, mb_height;
63 uint32_t mb_scan_index[512];
64 int data_offset; // End of mb_scan_index, where macroblocks start
65 int cur_field; ///< current interlaced field
66 VLC ac_vlc, dc_vlc, run_vlc;
67 IDCTDSPContext idsp;
68 ScanTable scantable;
69 const CIDEntry *cid_table;
70 int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
71 int is_444;
72 int alpha;
73 int lla;
74 int mbaff;
75 int act;
76 int (*decode_dct_block)(const struct DNXHDContext *ctx,
77 RowContext *row, int n);
78 } DNXHDContext;
79
80 #define DNXHD_VLC_BITS 9
81 #define DNXHD_DC_VLC_BITS 7
82
83 static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
84 RowContext *row, int n);
85 static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
86 RowContext *row, int n);
87 static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
88 RowContext *row, int n);
89 static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
90 RowContext *row, int n);
91 static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
92 RowContext *row, int n);
93
dnxhd_decode_init(AVCodecContext *avctx)94 static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
95 {
96 DNXHDContext *ctx = avctx->priv_data;
97
98 ctx->avctx = avctx;
99 ctx->cid = -1;
100 if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) {
101 avctx->colorspace = AVCOL_SPC_BT709;
102 }
103
104 avctx->coded_width = FFALIGN(avctx->width, 16);
105 avctx->coded_height = FFALIGN(avctx->height, 16);
106
107 ctx->rows = av_calloc(avctx->thread_count, sizeof(*ctx->rows));
108 if (!ctx->rows)
109 return AVERROR(ENOMEM);
110
111 return 0;
112 }
113
dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)114 static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
115 {
116 int ret;
117 if (cid != ctx->cid) {
118 const CIDEntry *cid_table = ff_dnxhd_get_cid_table(cid);
119
120 if (!cid_table) {
121 av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid);
122 return AVERROR(ENOSYS);
123 }
124 if (cid_table->bit_depth != bitdepth &&
125 cid_table->bit_depth != DNXHD_VARIABLE) {
126 av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n",
127 cid_table->bit_depth, bitdepth);
128 return AVERROR_INVALIDDATA;
129 }
130 ctx->cid_table = cid_table;
131 av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
132
133 ff_free_vlc(&ctx->ac_vlc);
134 ff_free_vlc(&ctx->dc_vlc);
135 ff_free_vlc(&ctx->run_vlc);
136
137 if ((ret = init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
138 ctx->cid_table->ac_bits, 1, 1,
139 ctx->cid_table->ac_codes, 2, 2, 0)) < 0)
140 goto out;
141 if ((ret = init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12,
142 ctx->cid_table->dc_bits, 1, 1,
143 ctx->cid_table->dc_codes, 1, 1, 0)) < 0)
144 goto out;
145 if ((ret = init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
146 ctx->cid_table->run_bits, 1, 1,
147 ctx->cid_table->run_codes, 2, 2, 0)) < 0)
148 goto out;
149
150 ctx->cid = cid;
151 }
152 ret = 0;
153 out:
154 if (ret < 0)
155 av_log(ctx->avctx, AV_LOG_ERROR, "init_vlc failed\n");
156 return ret;
157 }
158
dnxhd_get_profile(int cid)159 static int dnxhd_get_profile(int cid)
160 {
161 switch(cid) {
162 case 1270:
163 return FF_PROFILE_DNXHR_444;
164 case 1271:
165 return FF_PROFILE_DNXHR_HQX;
166 case 1272:
167 return FF_PROFILE_DNXHR_HQ;
168 case 1273:
169 return FF_PROFILE_DNXHR_SQ;
170 case 1274:
171 return FF_PROFILE_DNXHR_LB;
172 }
173 return FF_PROFILE_DNXHD;
174 }
175
dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size, int first_field)176 static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
177 const uint8_t *buf, int buf_size,
178 int first_field)
179 {
180 int i, cid, ret;
181 int old_bit_depth = ctx->bit_depth, bitdepth;
182 uint64_t header_prefix;
183 if (buf_size < 0x280) {
184 av_log(ctx->avctx, AV_LOG_ERROR,
185 "buffer too small (%d < 640).\n", buf_size);
186 return AVERROR_INVALIDDATA;
187 }
188
189 header_prefix = ff_dnxhd_parse_header_prefix(buf);
190 if (header_prefix == 0) {
191 av_log(ctx->avctx, AV_LOG_ERROR,
192 "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
193 buf[0], buf[1], buf[2], buf[3], buf[4]);
194 return AVERROR_INVALIDDATA;
195 }
196 if (buf[5] & 2) { /* interlaced */
197 ctx->cur_field = first_field ? buf[5] & 1 : !ctx->cur_field;
198 frame->interlaced_frame = 1;
199 frame->top_field_first = first_field ^ ctx->cur_field;
200 av_log(ctx->avctx, AV_LOG_DEBUG,
201 "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
202 } else {
203 ctx->cur_field = 0;
204 }
205 ctx->mbaff = (buf[0x6] >> 5) & 1;
206 ctx->alpha = buf[0x7] & 1;
207 ctx->lla = (buf[0x7] >> 1) & 1;
208 if (ctx->alpha)
209 avpriv_request_sample(ctx->avctx, "alpha");
210
211 ctx->height = AV_RB16(buf + 0x18);
212 ctx->width = AV_RB16(buf + 0x1a);
213
214 switch(buf[0x21] >> 5) {
215 case 1: bitdepth = 8; break;
216 case 2: bitdepth = 10; break;
217 case 3: bitdepth = 12; break;
218 default:
219 av_log(ctx->avctx, AV_LOG_ERROR,
220 "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
221 return AVERROR_INVALIDDATA;
222 }
223
224 cid = AV_RB32(buf + 0x28);
225
226 ctx->avctx->profile = dnxhd_get_profile(cid);
227
228 if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
229 return ret;
230 if (ctx->mbaff && ctx->cid_table->cid != 1260)
231 av_log(ctx->avctx, AV_LOG_WARNING,
232 "Adaptive MB interlace flag in an unsupported profile.\n");
233
234 switch ((buf[0x2C] >> 1) & 3) {
235 case 0: frame->colorspace = AVCOL_SPC_BT709; break;
236 case 1: frame->colorspace = AVCOL_SPC_BT2020_NCL; break;
237 case 2: frame->colorspace = AVCOL_SPC_BT2020_CL; break;
238 case 3: frame->colorspace = AVCOL_SPC_UNSPECIFIED; break;
239 }
240
241 ctx->act = buf[0x2C] & 1;
242 if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
243 av_log(ctx->avctx, AV_LOG_WARNING,
244 "Adaptive color transform in an unsupported profile.\n");
245
246 ctx->is_444 = (buf[0x2C] >> 6) & 1;
247 if (ctx->is_444) {
248 if (bitdepth == 8) {
249 avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
250 return AVERROR_INVALIDDATA;
251 } else if (bitdepth == 10) {
252 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
253 ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
254 : AV_PIX_FMT_GBRP10;
255 } else {
256 ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
257 ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
258 : AV_PIX_FMT_GBRP12;
259 }
260 } else if (bitdepth == 12) {
261 ctx->decode_dct_block = dnxhd_decode_dct_block_12;
262 ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
263 } else if (bitdepth == 10) {
264 if (ctx->avctx->profile == FF_PROFILE_DNXHR_HQX)
265 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
266 else
267 ctx->decode_dct_block = dnxhd_decode_dct_block_10;
268 ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
269 } else {
270 ctx->decode_dct_block = dnxhd_decode_dct_block_8;
271 ctx->pix_fmt = AV_PIX_FMT_YUV422P;
272 }
273
274 ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
275 if (ctx->bit_depth != old_bit_depth) {
276 ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
277 ff_idctdsp_init(&ctx->idsp, ctx->avctx);
278 ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
279 ff_zigzag_direct);
280 }
281
282 // make sure profile size constraints are respected
283 // DNx100 allows 1920->1440 and 1280->960 subsampling
284 if (ctx->width != ctx->cid_table->width &&
285 ctx->cid_table->width != DNXHD_VARIABLE) {
286 av_reduce(&ctx->avctx->sample_aspect_ratio.num,
287 &ctx->avctx->sample_aspect_ratio.den,
288 ctx->width, ctx->cid_table->width, 255);
289 ctx->width = ctx->cid_table->width;
290 }
291
292 if (buf_size < ctx->cid_table->coding_unit_size) {
293 av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
294 buf_size, ctx->cid_table->coding_unit_size);
295 return AVERROR_INVALIDDATA;
296 }
297
298 ctx->mb_width = (ctx->width + 15)>> 4;
299 ctx->mb_height = AV_RB16(buf + 0x16c);
300
301 if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
302 ctx->height <<= 1;
303
304 av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
305 ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
306 ctx->bit_depth, ctx->mbaff, ctx->act);
307
308 // Newer format supports variable mb_scan_index sizes
309 if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
310 ctx->data_offset = 0x170 + (ctx->mb_height << 2);
311 } else {
312 if (ctx->mb_height > 68) {
313 av_log(ctx->avctx, AV_LOG_ERROR,
314 "mb height too big: %d\n", ctx->mb_height);
315 return AVERROR_INVALIDDATA;
316 }
317 ctx->data_offset = 0x280;
318 }
319 if ((ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
320 av_log(ctx->avctx, AV_LOG_ERROR,
321 "mb height too big: %d\n", ctx->mb_height);
322 return AVERROR_INVALIDDATA;
323 }
324
325 if (buf_size < ctx->data_offset) {
326 av_log(ctx->avctx, AV_LOG_ERROR,
327 "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
328 return AVERROR_INVALIDDATA;
329 }
330
331 if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
332 av_log(ctx->avctx, AV_LOG_ERROR,
333 "mb_height too big (%d > %"SIZE_SPECIFIER").\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
334 return AVERROR_INVALIDDATA;
335 }
336
337 for (i = 0; i < ctx->mb_height; i++) {
338 ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
339 ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n",
340 i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
341 if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
342 av_log(ctx->avctx, AV_LOG_ERROR,
343 "invalid mb scan index (%"PRIu32" vs %u).\n",
344 ctx->mb_scan_index[i], buf_size - ctx->data_offset);
345 return AVERROR_INVALIDDATA;
346 }
347 }
348
349 return 0;
350 }
351
dnxhd_decode_dct_block(const DNXHDContext *ctx, RowContext *row, int n, int index_bits, int level_bias, int level_shift, int dc_shift)352 static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
353 RowContext *row,
354 int n,
355 int index_bits,
356 int level_bias,
357 int level_shift,
358 int dc_shift)
359 {
360 int i, j, index1, index2, len, flags;
361 int level, component, sign;
362 const int *scale;
363 const uint8_t *weight_matrix;
364 const uint8_t *ac_info = ctx->cid_table->ac_info;
365 int16_t *block = row->blocks[n];
366 const int eob_index = ctx->cid_table->eob_index;
367 int ret = 0;
368 OPEN_READER(bs, &row->gb);
369
370 ctx->bdsp.clear_block(block);
371
372 if (!ctx->is_444) {
373 if (n & 2) {
374 component = 1 + (n & 1);
375 scale = row->chroma_scale;
376 weight_matrix = ctx->cid_table->chroma_weight;
377 } else {
378 component = 0;
379 scale = row->luma_scale;
380 weight_matrix = ctx->cid_table->luma_weight;
381 }
382 } else {
383 component = (n >> 1) % 3;
384 if (component) {
385 scale = row->chroma_scale;
386 weight_matrix = ctx->cid_table->chroma_weight;
387 } else {
388 scale = row->luma_scale;
389 weight_matrix = ctx->cid_table->luma_weight;
390 }
391 }
392
393 UPDATE_CACHE(bs, &row->gb);
394 GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
395 if (len < 0) {
396 ret = len;
397 goto error;
398 }
399 if (len) {
400 level = GET_CACHE(bs, &row->gb);
401 LAST_SKIP_BITS(bs, &row->gb, len);
402 sign = ~level >> 31;
403 level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
404 row->last_dc[component] += level * (1 << dc_shift);
405 }
406 block[0] = row->last_dc[component];
407
408 i = 0;
409
410 UPDATE_CACHE(bs, &row->gb);
411 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
412 DNXHD_VLC_BITS, 2);
413
414 while (index1 != eob_index) {
415 level = ac_info[2*index1+0];
416 flags = ac_info[2*index1+1];
417
418 sign = SHOW_SBITS(bs, &row->gb, 1);
419 SKIP_BITS(bs, &row->gb, 1);
420
421 if (flags & 1) {
422 level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
423 SKIP_BITS(bs, &row->gb, index_bits);
424 }
425
426 if (flags & 2) {
427 UPDATE_CACHE(bs, &row->gb);
428 GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
429 DNXHD_VLC_BITS, 2);
430 i += ctx->cid_table->run[index2];
431 }
432
433 if (++i > 63) {
434 av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
435 ret = -1;
436 break;
437 }
438
439 j = ctx->scantable.permutated[i];
440 level *= scale[i];
441 level += scale[i] >> 1;
442 if (level_bias < 32 || weight_matrix[i] != level_bias)
443 level += level_bias; // 1<<(level_shift-1)
444 level >>= level_shift;
445
446 block[j] = (level ^ sign) - sign;
447
448 UPDATE_CACHE(bs, &row->gb);
449 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
450 DNXHD_VLC_BITS, 2);
451 }
452 error:
453 CLOSE_READER(bs, &row->gb);
454 return ret;
455 }
456
dnxhd_decode_dct_block_8(const DNXHDContext *ctx, RowContext *row, int n)457 static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
458 RowContext *row, int n)
459 {
460 return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
461 }
462
dnxhd_decode_dct_block_10(const DNXHDContext *ctx, RowContext *row, int n)463 static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
464 RowContext *row, int n)
465 {
466 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
467 }
468
dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx, RowContext *row, int n)469 static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
470 RowContext *row, int n)
471 {
472 return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
473 }
474
dnxhd_decode_dct_block_12(const DNXHDContext *ctx, RowContext *row, int n)475 static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
476 RowContext *row, int n)
477 {
478 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
479 }
480
dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx, RowContext *row, int n)481 static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
482 RowContext *row, int n)
483 {
484 return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
485 }
486
dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row, AVFrame *frame, int x, int y)487 static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
488 AVFrame *frame, int x, int y)
489 {
490 int shift1 = ctx->bit_depth >= 10;
491 int dct_linesize_luma = frame->linesize[0];
492 int dct_linesize_chroma = frame->linesize[1];
493 uint8_t *dest_y, *dest_u, *dest_v;
494 int dct_y_offset, dct_x_offset;
495 int qscale, i, act;
496 int interlaced_mb = 0;
497
498 if (ctx->mbaff) {
499 interlaced_mb = get_bits1(&row->gb);
500 qscale = get_bits(&row->gb, 10);
501 } else {
502 qscale = get_bits(&row->gb, 11);
503 }
504 act = get_bits1(&row->gb);
505 if (act) {
506 if (!ctx->act) {
507 static int act_warned;
508 if (!act_warned) {
509 act_warned = 1;
510 av_log(ctx->avctx, AV_LOG_ERROR,
511 "ACT flag set, in violation of frame header.\n");
512 }
513 } else if (row->format == -1) {
514 row->format = act;
515 } else if (row->format != act) {
516 row->format = 2; // Variable
517 }
518 }
519
520 if (qscale != row->last_qscale) {
521 for (i = 0; i < 64; i++) {
522 row->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
523 row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
524 }
525 row->last_qscale = qscale;
526 }
527
528 for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
529 if (ctx->decode_dct_block(ctx, row, i) < 0)
530 return AVERROR_INVALIDDATA;
531 }
532
533 if (frame->interlaced_frame) {
534 dct_linesize_luma <<= 1;
535 dct_linesize_chroma <<= 1;
536 }
537
538 dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
539 dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
540 dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
541
542 if (frame->interlaced_frame && ctx->cur_field) {
543 dest_y += frame->linesize[0];
544 dest_u += frame->linesize[1];
545 dest_v += frame->linesize[2];
546 }
547 if (interlaced_mb) {
548 dct_linesize_luma <<= 1;
549 dct_linesize_chroma <<= 1;
550 }
551
552 dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
553 dct_x_offset = 8 << shift1;
554 if (!ctx->is_444) {
555 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
556 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
557 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[4]);
558 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
559
560 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
561 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
562 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
563 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[3]);
564 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
565 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
566 }
567 } else {
568 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
569 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
570 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[6]);
571 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
572
573 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
574 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
575 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
576 ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, row->blocks[3]);
577 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[8]);
578 ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
579 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[4]);
580 ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, row->blocks[5]);
581 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[10]);
582 ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
583 }
584 }
585
586 return 0;
587 }
588
dnxhd_decode_row(AVCodecContext *avctx, void *data, int rownb, int threadnb)589 static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
590 int rownb, int threadnb)
591 {
592 const DNXHDContext *ctx = avctx->priv_data;
593 uint32_t offset = ctx->mb_scan_index[rownb];
594 RowContext *row = ctx->rows + threadnb;
595 int x, ret;
596
597 row->last_dc[0] =
598 row->last_dc[1] =
599 row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
600 ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset);
601 if (ret < 0) {
602 row->errors++;
603 return ret;
604 }
605 for (x = 0; x < ctx->mb_width; x++) {
606 int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
607 if (ret < 0) {
608 row->errors++;
609 return ret;
610 }
611 }
612
613 return 0;
614 }
615
dnxhd_decode_frame(AVCodecContext *avctx, AVFrame *picture, int *got_frame, AVPacket *avpkt)616 static int dnxhd_decode_frame(AVCodecContext *avctx, AVFrame *picture,
617 int *got_frame, AVPacket *avpkt)
618 {
619 const uint8_t *buf = avpkt->data;
620 int buf_size = avpkt->size;
621 DNXHDContext *ctx = avctx->priv_data;
622 int first_field = 1;
623 int ret, i;
624
625 ff_dlog(avctx, "frame size %d\n", buf_size);
626
627 for (i = 0; i < avctx->thread_count; i++)
628 ctx->rows[i].format = -1;
629
630 decode_coding_unit:
631 if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
632 return ret;
633
634 if ((avctx->width || avctx->height) &&
635 (ctx->width != avctx->width || ctx->height != avctx->height)) {
636 av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
637 avctx->width, avctx->height, ctx->width, ctx->height);
638 first_field = 1;
639 }
640 if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
641 av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
642 av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
643 first_field = 1;
644 }
645
646 avctx->pix_fmt = ctx->pix_fmt;
647 ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
648 if (ret < 0)
649 return ret;
650
651 if (first_field) {
652 if ((ret = ff_thread_get_buffer(avctx, picture, 0)) < 0)
653 return ret;
654 picture->pict_type = AV_PICTURE_TYPE_I;
655 picture->key_frame = 1;
656 }
657
658 ctx->buf_size = buf_size - ctx->data_offset;
659 ctx->buf = buf + ctx->data_offset;
660 avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
661
662 if (first_field && picture->interlaced_frame) {
663 buf += ctx->cid_table->coding_unit_size;
664 buf_size -= ctx->cid_table->coding_unit_size;
665 first_field = 0;
666 goto decode_coding_unit;
667 }
668
669 ret = 0;
670 for (i = 0; i < avctx->thread_count; i++) {
671 ret += ctx->rows[i].errors;
672 ctx->rows[i].errors = 0;
673 }
674
675 if (ctx->act) {
676 static int act_warned;
677 int format = ctx->rows[0].format;
678 for (i = 1; i < avctx->thread_count; i++) {
679 if (ctx->rows[i].format != format &&
680 ctx->rows[i].format != -1 /* not run */) {
681 format = 2;
682 break;
683 }
684 }
685 switch (format) {
686 case -1:
687 case 2:
688 if (!act_warned) {
689 act_warned = 1;
690 av_log(ctx->avctx, AV_LOG_ERROR,
691 "Unsupported: variable ACT flag.\n");
692 }
693 break;
694 case 0:
695 ctx->pix_fmt = ctx->bit_depth==10
696 ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
697 break;
698 case 1:
699 ctx->pix_fmt = ctx->bit_depth==10
700 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
701 break;
702 }
703 }
704 avctx->pix_fmt = ctx->pix_fmt;
705 if (ret) {
706 av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
707 return AVERROR_INVALIDDATA;
708 }
709
710 *got_frame = 1;
711 return avpkt->size;
712 }
713
dnxhd_decode_close(AVCodecContext *avctx)714 static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
715 {
716 DNXHDContext *ctx = avctx->priv_data;
717
718 ff_free_vlc(&ctx->ac_vlc);
719 ff_free_vlc(&ctx->dc_vlc);
720 ff_free_vlc(&ctx->run_vlc);
721
722 av_freep(&ctx->rows);
723
724 return 0;
725 }
726
727 const FFCodec ff_dnxhd_decoder = {
728 .p.name = "dnxhd",
729 .p.long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
730 .p.type = AVMEDIA_TYPE_VIDEO,
731 .p.id = AV_CODEC_ID_DNXHD,
732 .priv_data_size = sizeof(DNXHDContext),
733 .init = dnxhd_decode_init,
734 .close = dnxhd_decode_close,
735 FF_CODEC_DECODE_CB(dnxhd_decode_frame),
736 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
737 AV_CODEC_CAP_SLICE_THREADS,
738 .p.profiles = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
739 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
740 };
741