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