FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/dnxhddec.c
Date: 2026-10-11 08:45:34
Exec Total Coverage
Lines: 310 396 78.3%
Functions: 13 14 92.9%
Branches: 162 231 70.1%
Line Branch Exec Source
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/mem.h"
28 #include "libavutil/mem_internal.h"
29 #include "libavutil/pixdesc.h"
30
31 #include "avcodec.h"
32 #include "blockdsp.h"
33 #include "codec_internal.h"
34 #include "decode.h"
35 #define UNCHECKED_BITSTREAM_READER 1
36 #include "get_bits.h"
37 #include "dnxhddata.h"
38 #include "idctdsp.h"
39 #include "profiles.h"
40 #include "thread.h"
41
42 typedef struct RowContext {
43 DECLARE_ALIGNED(32, int16_t, blocks)[12][64];
44 int luma_scale[64];
45 int chroma_scale[64];
46 GetBitContext gb;
47 int last_dc[3];
48 int last_qscale;
49 int errors;
50 /** -1:not set yet 0:off=RGB 1:on=YUV 2:variable */
51 int format;
52 } RowContext;
53
54 typedef struct DNXHDContext {
55 AVCodecContext *avctx;
56 RowContext *rows;
57 BlockDSPContext bdsp;
58 const uint8_t* buf;
59 int buf_size;
60 int64_t cid; ///< compression id
61 unsigned int width, height;
62 enum AVPixelFormat pix_fmt;
63 unsigned int mb_width, mb_height;
64 uint32_t mb_scan_index[512];
65 int data_offset; // End of mb_scan_index, where macroblocks start
66 int cur_field; ///< current interlaced field
67 VLC ac_vlc, dc_vlc, run_vlc;
68 IDCTDSPContext idsp;
69 uint8_t permutated_scantable[64];
70 const CIDEntry *cid_table;
71 int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
72 int is_444;
73 int alpha;
74 int lla;
75 int mbaff;
76 int act;
77 int (*decode_dct_block)(const struct DNXHDContext *ctx,
78 RowContext *row, int n);
79 } DNXHDContext;
80
81 #define DNXHD_VLC_BITS 9
82 #define DNXHD_DC_VLC_BITS 7
83
84 static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
85 RowContext *row, int n);
86 static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
87 RowContext *row, int n);
88 static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
89 RowContext *row, int n);
90 static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
91 RowContext *row, int n);
92 static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
93 RowContext *row, int n);
94
95 149 static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
96 {
97 149 DNXHDContext *ctx = avctx->priv_data;
98
99 149 ctx->avctx = avctx;
100 149 ctx->cid = -1;
101
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 149 if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) {
102 74 avctx->colorspace = AVCOL_SPC_BT709;
103 }
104
105 149 avctx->coded_width = FFALIGN(avctx->width, 16);
106 149 avctx->coded_height = FFALIGN(avctx->height, 16);
107
108 149 ctx->rows = av_calloc(avctx->thread_count, sizeof(*ctx->rows));
109
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 149 if (!ctx->rows)
110 ✗ return AVERROR(ENOMEM);
111
112 149 return 0;
113 }
114
115 502 static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
116 {
117 int ret;
118
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 502 if (cid != ctx->cid) {
119 148 const CIDEntry *cid_table = ff_dnxhd_get_cid_table(cid);
120
121
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 148 if (!cid_table) {
122 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid);
123 ✗ return AVERROR(ENOSYS);
124 }
125
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 148 if (cid_table->bit_depth != bitdepth &&
126
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 4 cid_table->bit_depth != DNXHD_VARIABLE) {
127 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n",
128 ✗ cid_table->bit_depth, bitdepth);
129 ✗ return AVERROR_INVALIDDATA;
130 }
131 148 ctx->cid_table = cid_table;
132 148 av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
133
134 148 ff_vlc_free(&ctx->ac_vlc);
135 148 ff_vlc_free(&ctx->dc_vlc);
136 148 ff_vlc_free(&ctx->run_vlc);
137
138
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 148 if ((ret = vlc_init(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
139 ctx->cid_table->ac_bits, 1, 1,
140 ctx->cid_table->ac_codes, 2, 2, 0)) < 0)
141 ✗ goto out;
142
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 148 if ((ret = vlc_init(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12,
143 ctx->cid_table->dc_bits, 1, 1,
144 ctx->cid_table->dc_codes, 1, 1, 0)) < 0)
145 ✗ goto out;
146
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 148 if ((ret = ff_vlc_init_sparse(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
147 148 ctx->cid_table->run_bits, 1, 1,
148 148 ctx->cid_table->run_codes, 2, 2,
149 148 ctx->cid_table->run, 1, 1, 0)) < 0)
150 ✗ goto out;
151
152 148 ctx->cid = cid;
153 }
154 502 ret = 0;
155 502 out:
156
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 502 if (ret < 0)
157 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "vlc_init failed\n");
158 502 return ret;
159 }
160
161 502 static int dnxhd_get_profile(int cid)
162 {
163
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 502 switch(cid) {
164 2 case 1270:
165 2 return AV_PROFILE_DNXHR_444;
166 2 case 1271:
167 2 return AV_PROFILE_DNXHR_HQX;
168 120 case 1272:
169 120 return AV_PROFILE_DNXHR_HQ;
170 48 case 1273:
171 48 return AV_PROFILE_DNXHR_SQ;
172 111 case 1274:
173 111 return AV_PROFILE_DNXHR_LB;
174 }
175 219 return AV_PROFILE_DNXHD;
176 }
177
178 502 static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
179 const uint8_t *buf, int buf_size,
180 int first_field)
181 {
182 int i, cid, ret;
183 502 int old_bit_depth = ctx->bit_depth, bitdepth;
184 uint64_t header_prefix;
185
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 502 if (buf_size < 0x280) {
186 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
187 "buffer too small (%d < 640).\n", buf_size);
188 ✗ return AVERROR_INVALIDDATA;
189 }
190
191 502 header_prefix = ff_dnxhd_parse_header_prefix(buf);
192
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 502 if (header_prefix == 0) {
193 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
194 "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
195 ✗ buf[0], buf[1], buf[2], buf[3], buf[4]);
196 ✗ return AVERROR_INVALIDDATA;
197 }
198
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 502 if (buf[5] & 2) { /* interlaced */
199
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 134 ctx->cur_field = first_field ? buf[5] & 1 : !ctx->cur_field;
200 134 frame->flags |= AV_FRAME_FLAG_INTERLACED;
201
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 134 if (first_field ^ ctx->cur_field)
202 134 frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
203 134 av_log(ctx->avctx, AV_LOG_DEBUG,
204 134 "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
205 } else {
206 368 ctx->cur_field = 0;
207 }
208 502 ctx->mbaff = (buf[0x6] >> 5) & 1;
209 502 ctx->alpha = buf[0x7] & 1;
210 502 ctx->lla = (buf[0x7] >> 1) & 1;
211
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 502 if (ctx->alpha) {
212 ✗ if (ctx->lla) {
213 ✗ avpriv_request_sample(ctx->avctx, "RLE block alpha decoding");
214 } else {
215 ✗ avpriv_request_sample(ctx->avctx, "DCT block alpha decoding");
216 }
217 }
218
219 502 ctx->height = AV_RB16(buf + 0x18);
220 502 ctx->width = AV_RB16(buf + 0x1a);
221
222
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 502 switch(buf[0x21] >> 5) {
223 432 case 1: bitdepth = 8; break;
224 68 case 2: bitdepth = 10; break;
225 2 case 3: bitdepth = 12; break;
226 ✗ default:
227 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
228 ✗ "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
229 ✗ return AVERROR_INVALIDDATA;
230 }
231
232 502 cid = AV_RB32(buf + 0x28);
233
234 502 ctx->avctx->profile = dnxhd_get_profile(cid);
235
236
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 502 if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
237 ✗ return ret;
238
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 502 if (ctx->mbaff && ctx->cid_table->cid != 1260)
239 ✗ av_log(ctx->avctx, AV_LOG_WARNING,
240 "Adaptive MB interlace flag in an unsupported profile.\n");
241
242
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 502 switch ((buf[0x2C] >> 1) & 3) {
243 502 case 0: frame->colorspace = AVCOL_SPC_BT709; break;
244 ✗ case 1: frame->colorspace = AVCOL_SPC_BT2020_NCL; break;
245 ✗ case 2: frame->colorspace = AVCOL_SPC_BT2020_CL; break;
246 ✗ case 3: frame->colorspace = AVCOL_SPC_UNSPECIFIED; break;
247 }
248
249 502 ctx->act = buf[0x2C] & 1;
250
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 502 if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
251 ✗ av_log(ctx->avctx, AV_LOG_WARNING,
252 "Adaptive color transform in an unsupported profile.\n");
253
254 502 ctx->is_444 = (buf[0x2C] >> 6) & 1;
255
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 502 if (ctx->is_444) {
256
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 2 if (bitdepth == 8) {
257 ✗ avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
258 ✗ return AVERROR_INVALIDDATA;
259
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 2 } else if (bitdepth == 10) {
260 2 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
261 2 ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
262
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 2 : AV_PIX_FMT_GBRP10;
263 } else {
264 ✗ ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
265 ✗ ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
266 ✗ : AV_PIX_FMT_GBRP12;
267 }
268
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 500 } else if (bitdepth == 12) {
269 2 ctx->decode_dct_block = dnxhd_decode_dct_block_12;
270 2 ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
271
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 498 } else if (bitdepth == 10) {
272
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 66 if (ctx->avctx->profile == AV_PROFILE_DNXHR_HQX)
273 ✗ ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
274 else
275 66 ctx->decode_dct_block = dnxhd_decode_dct_block_10;
276 66 ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
277 } else {
278 432 ctx->decode_dct_block = dnxhd_decode_dct_block_8;
279 432 ctx->pix_fmt = AV_PIX_FMT_YUV422P;
280 }
281
282 502 ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
283
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 502 if (ctx->bit_depth != old_bit_depth) {
284 148 ff_blockdsp_init(&ctx->bdsp);
285 148 ff_idctdsp_init(&ctx->idsp, ctx->avctx);
286 148 ff_permute_scantable(ctx->permutated_scantable, ff_zigzag_direct,
287 148 ctx->idsp.idct_permutation);
288 }
289
290 // make sure profile size constraints are respected
291 // DNx100 allows 1920->1440 and 1280->960 subsampling
292
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 502 if (ctx->width != ctx->cid_table->width &&
293
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 285 ctx->cid_table->width != DNXHD_VARIABLE) {
294 2 av_reduce(&ctx->avctx->sample_aspect_ratio.num,
295 2 &ctx->avctx->sample_aspect_ratio.den,
296 2 ctx->width, ctx->cid_table->width, 255);
297 2 ctx->width = ctx->cid_table->width;
298 }
299
300
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 502 if (buf_size < ctx->cid_table->coding_unit_size) {
301 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
302 ✗ buf_size, ctx->cid_table->coding_unit_size);
303 ✗ return AVERROR_INVALIDDATA;
304 }
305
306 502 ctx->mb_width = (ctx->width + 15)>> 4;
307 502 ctx->mb_height = AV_RB16(buf + 0x16c);
308
309
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 502 if ((ctx->height + 15) >> 4 == ctx->mb_height && (frame->flags & AV_FRAME_FLAG_INTERLACED))
310 134 ctx->height <<= 1;
311
312 502 av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
313
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 502 ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
314 ctx->bit_depth, ctx->mbaff, ctx->act);
315
316 // Newer format supports variable mb_scan_index sizes
317
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 502 if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
318 108 ctx->data_offset = 0x170 + (ctx->mb_height << 2);
319 } else {
320
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 394 if (ctx->mb_height > 68) {
321 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
322 "mb height too big: %d\n", ctx->mb_height);
323 ✗ return AVERROR_INVALIDDATA;
324 }
325 394 ctx->data_offset = 0x280;
326 }
327
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 502 if ((ctx->mb_height << !!(frame->flags & AV_FRAME_FLAG_INTERLACED)) > (ctx->height + 15) >> 4) {
328 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
329 "mb height too big: %d\n", ctx->mb_height);
330 ✗ return AVERROR_INVALIDDATA;
331 }
332
333
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 502 if (buf_size < ctx->data_offset) {
334 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
335 "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
336 ✗ return AVERROR_INVALIDDATA;
337 }
338
339
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 502 if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
340 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
341 "mb_height too big (%d > %zu).\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
342 ✗ return AVERROR_INVALIDDATA;
343 }
344
345
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 30675 for (i = 0; i < ctx->mb_height; i++) {
346 30173 ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
347 ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n",
348 i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
349
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 30173 if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
350 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
351 "invalid mb scan index (%"PRIu32" vs %u).\n",
352 ✗ ctx->mb_scan_index[i], buf_size - ctx->data_offset);
353 ✗ return AVERROR_INVALIDDATA;
354 }
355 }
356
357 502 return 0;
358 }
359
360 34743936 static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
361 RowContext *row,
362 int n,
363 int index_bits,
364 int level_bias,
365 int level_shift,
366 int dc_shift)
367 {
368 int i, j, index1, len, flags;
369 int level, component, sign;
370 const int *scale;
371 const uint8_t *weight_matrix;
372 34743936 const uint8_t *ac_info = ctx->cid_table->ac_info;
373 34743936 int16_t *block = row->blocks[n];
374 34743936 const int eob_index = ctx->cid_table->eob_index;
375 34743936 int ret = 0;
376 34743936 OPEN_READER(bs, &row->gb);
377
378 34743936 ctx->bdsp.clear_block(block);
379
380
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 34743936 if (!ctx->is_444) {
381
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 34591296 if (n & 2) {
382 17295648 component = 1 + (n & 1);
383 } else {
384 17295648 component = 0;
385 }
386 } else {
387 152640 component = (n >> 1) % 3;
388 }
389
390
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 34743936 if (component) {
391 17397408 scale = row->chroma_scale;
392 17397408 weight_matrix = ctx->cid_table->chroma_weight;
393 } else {
394 17346528 scale = row->luma_scale;
395 17346528 weight_matrix = ctx->cid_table->luma_weight;
396 }
397
398 34743936 UPDATE_CACHE(bs, &row->gb);
399 34743936 GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
400
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 34743936 if (len < 0) {
401 ✗ ret = len;
402 ✗ goto error;
403 }
404
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 34743936 if (len) {
405 32365764 level = GET_CACHE(bs, &row->gb);
406 32365764 LAST_SKIP_BITS(bs, &row->gb, len);
407 32365764 sign = ~level >> 31;
408 32365764 level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
409 32365764 row->last_dc[component] += level * (1 << dc_shift);
410 }
411 34743936 block[0] = row->last_dc[component];
412
413 34743936 i = 0;
414
415 34743936 UPDATE_CACHE(bs, &row->gb);
416
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 34743936 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
417 DNXHD_VLC_BITS, 2);
418
419
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 176938749 while (index1 != eob_index) {
420 142194813 level = ac_info[2*index1+0];
421 142194813 flags = ac_info[2*index1+1];
422
423 142194813 sign = SHOW_SBITS(bs, &row->gb, 1);
424 142194813 SKIP_BITS(bs, &row->gb, 1);
425
426
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 142194813 if (flags & 1) {
427 2609257 level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
428 2609257 SKIP_BITS(bs, &row->gb, index_bits);
429 }
430
431
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 142194813 if (flags & 2) {
432 int run;
433 46521239 UPDATE_CACHE(bs, &row->gb);
434
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 46521239 GET_VLC(run, bs, &row->gb, ctx->run_vlc.table,
435 DNXHD_VLC_BITS, 2);
436 46521239 i += run;
437 }
438
439
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 142194813 if (++i > 63) {
440 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
441 ✗ ret = -1;
442 ✗ break;
443 }
444
445 142194813 j = ctx->permutated_scantable[i];
446 142194813 level *= scale[i];
447 142194813 level += scale[i] >> 1;
448
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 142194813 if (level_bias < 32 || weight_matrix[i] != level_bias)
449 117255751 level += level_bias; // 1<<(level_shift-1)
450 142194813 level >>= level_shift;
451
452 142194813 block[j] = (level ^ sign) - sign;
453
454 142194813 UPDATE_CACHE(bs, &row->gb);
455
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 142194813 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
456 DNXHD_VLC_BITS, 2);
457 }
458 34743936 error:
459 34743936 CLOSE_READER(bs, &row->gb);
460 34743936 return ret;
461 }
462
463 32375616 static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
464 RowContext *row, int n)
465 {
466 32375616 return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
467 }
468
469 2085120 static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
470 RowContext *row, int n)
471 {
472 2085120 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
473 }
474
475 152640 static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
476 RowContext *row, int n)
477 {
478 152640 return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
479 }
480
481 130560 static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
482 RowContext *row, int n)
483 {
484 130560 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
485 }
486
487 ✗ static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
488 RowContext *row, int n)
489 {
490 ✗ return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
491 }
492
493 4336632 static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
494 AVFrame *frame, int x, int y)
495 {
496 4336632 int shift1 = ctx->bit_depth >= 10;
497 4336632 int dct_linesize_luma = frame->linesize[0];
498 4336632 int dct_linesize_chroma = frame->linesize[1];
499 uint8_t *dest_y, *dest_u, *dest_v;
500 int dct_y_offset, dct_x_offset;
501 int qscale, i, act;
502 4336632 int interlaced_mb = 0;
503
504
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 4336632 if (ctx->mbaff) {
505 12240 interlaced_mb = get_bits1(&row->gb);
506 12240 qscale = get_bits(&row->gb, 10);
507 } else {
508 4324392 qscale = get_bits(&row->gb, 11);
509 }
510 4336632 act = get_bits1(&row->gb);
511
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 4336632 if (act) {
512
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 12720 if (!ctx->act) {
513 static int act_warned;
514 ✗ if (!act_warned) {
515 ✗ act_warned = 1;
516 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
517 "ACT flag set, in violation of frame header.\n");
518 }
519
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 12720 } else if (row->format == -1) {
520 2 row->format = act;
521
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 12718 } else if (row->format != act) {
522 ✗ row->format = 2; // Variable
523 }
524 }
525
526
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 4336632 if (qscale != row->last_qscale) {
527
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 23058555 for (i = 0; i < 64; i++) {
528 22703808 row->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
529 22703808 row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
530 }
531 354747 row->last_qscale = qscale;
532 }
533
534
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 39080568 for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
535
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 34743936 if (ctx->decode_dct_block(ctx, row, i) < 0)
536 ✗ return AVERROR_INVALIDDATA;
537 }
538
539
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 4336632 if (frame->flags & AV_FRAME_FLAG_INTERLACED) {
540 546720 dct_linesize_luma <<= 1;
541 546720 dct_linesize_chroma <<= 1;
542 }
543
544 4336632 dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
545 4336632 dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
546 4336632 dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
547
548
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 4336632 if ((frame->flags & AV_FRAME_FLAG_INTERLACED) && ctx->cur_field) {
549 273360 dest_y += frame->linesize[0];
550 273360 dest_u += frame->linesize[1];
551 273360 dest_v += frame->linesize[2];
552 }
553
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 4336632 if (interlaced_mb) {
554 3224 dct_linesize_luma <<= 1;
555 3224 dct_linesize_chroma <<= 1;
556 }
557
558
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 4336632 dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
559 4336632 dct_x_offset = 8 << shift1;
560
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 4336632 if (!ctx->is_444) {
561 4323912 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
562 4323912 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
563 4323912 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[4]);
564 4323912 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
565
566
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 4323912 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
567
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 4323912 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
568 4323912 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
569 4323912 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[3]);
570 4323912 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
571 4323912 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
572 }
573 } else {
574 12720 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
575 12720 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
576 12720 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[6]);
577 12720 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
578
579
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 12720 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
580
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 12720 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
581 12720 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
582 12720 ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, row->blocks[3]);
583 12720 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[8]);
584 12720 ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
585 12720 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[4]);
586 12720 ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, row->blocks[5]);
587 12720 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[10]);
588 12720 ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
589 }
590 }
591
592 4336632 return 0;
593 }
594
595 30173 static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
596 int rownb, int threadnb)
597 {
598 30173 const DNXHDContext *ctx = avctx->priv_data;
599 30173 uint32_t offset = ctx->mb_scan_index[rownb];
600 30173 RowContext *row = ctx->rows + threadnb;
601 int x, ret;
602
603 30173 row->last_dc[0] =
604 30173 row->last_dc[1] =
605 30173 row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
606 30173 ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset);
607
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 30173 if (ret < 0) {
608 ✗ row->errors++;
609 ✗ return ret;
610 }
611
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 4366805 for (x = 0; x < ctx->mb_width; x++) {
612 4336632 int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
613
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 4336632 if (ret < 0) {
614 ✗ row->errors++;
615 ✗ return ret;
616 }
617 }
618
619 30173 return 0;
620 }
621
622 435 static int dnxhd_decode_frame(AVCodecContext *avctx, AVFrame *picture,
623 int *got_frame, AVPacket *avpkt)
624 {
625 435 const uint8_t *buf = avpkt->data;
626 435 int buf_size = avpkt->size;
627 435 DNXHDContext *ctx = avctx->priv_data;
628 435 int first_field = 1;
629 int ret, i;
630
631 ff_dlog(avctx, "frame size %d\n", buf_size);
632
633
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 870 for (i = 0; i < avctx->thread_count; i++)
634 435 ctx->rows[i].format = -1;
635
636 435 decode_coding_unit:
637
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 502 if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
638 ✗ return ret;
639
640
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 502 if ((avctx->width || avctx->height) &&
641
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 456 (ctx->width != avctx->width || ctx->height != avctx->height)) {
642 ✗ av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
643 avctx->width, avctx->height, ctx->width, ctx->height);
644 ✗ first_field = 1;
645 }
646
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 502 if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
647 ✗ av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
648 av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
649 ✗ first_field = 1;
650 }
651
652 502 avctx->pix_fmt = ctx->pix_fmt;
653 502 ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
654
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 502 if (ret < 0)
655 ✗ return ret;
656
657
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 502 if (first_field) {
658
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 435 if ((ret = ff_thread_get_buffer(avctx, picture, 0)) < 0)
659 ✗ return ret;
660 }
661
662 502 ctx->buf_size = buf_size - ctx->data_offset;
663 502 ctx->buf = buf + ctx->data_offset;
664 502 avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
665
666
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 502 if (first_field && (picture->flags & AV_FRAME_FLAG_INTERLACED)) {
667 67 buf += ctx->cid_table->coding_unit_size;
668 67 buf_size -= ctx->cid_table->coding_unit_size;
669 67 first_field = 0;
670 67 goto decode_coding_unit;
671 }
672
673 435 ret = 0;
674
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 870 for (i = 0; i < avctx->thread_count; i++) {
675 435 ret += ctx->rows[i].errors;
676 435 ctx->rows[i].errors = 0;
677 }
678
679
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 435 if (ctx->act) {
680 static int act_warned;
681 2 int format = ctx->rows[0].format;
682
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 2 for (i = 1; i < avctx->thread_count; i++) {
683 ✗ if (ctx->rows[i].format != format &&
684 ✗ ctx->rows[i].format != -1 /* not run */) {
685 ✗ format = 2;
686 ✗ break;
687 }
688 }
689
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 2 switch (format) {
690 ✗ case -1:
691 case 2:
692 ✗ if (!act_warned) {
693 ✗ act_warned = 1;
694 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
695 "Unsupported: variable ACT flag.\n");
696 }
697 ✗ break;
698 ✗ case 0:
699 ✗ ctx->pix_fmt = ctx->bit_depth==10
700 ✗ ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
701 ✗ break;
702 2 case 1:
703 4 ctx->pix_fmt = ctx->bit_depth==10
704
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 2 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
705 2 break;
706 }
707 }
708 435 avctx->pix_fmt = ctx->pix_fmt;
709
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 435 if (ret) {
710 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
711 ✗ return AVERROR_INVALIDDATA;
712 }
713
714 435 *got_frame = 1;
715 435 return avpkt->size;
716 }
717
718 149 static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
719 {
720 149 DNXHDContext *ctx = avctx->priv_data;
721
722 149 ff_vlc_free(&ctx->ac_vlc);
723 149 ff_vlc_free(&ctx->dc_vlc);
724 149 ff_vlc_free(&ctx->run_vlc);
725
726 149 av_freep(&ctx->rows);
727
728 149 return 0;
729 }
730
731 const FFCodec ff_dnxhd_decoder = {
732 .p.name = "dnxhd",
733 CODEC_LONG_NAME("VC3/DNxHD"),
734 .p.type = AVMEDIA_TYPE_VIDEO,
735 .p.id = AV_CODEC_ID_DNXHD,
736 .priv_data_size = sizeof(DNXHDContext),
737 .init = dnxhd_decode_init,
738 .close = dnxhd_decode_close,
739 FF_CODEC_DECODE_CB(dnxhd_decode_frame),
740 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
741 AV_CODEC_CAP_SLICE_THREADS,
742 .p.profiles = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
743 };
744