FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/dnxhddec.c
Date: 2026-01-16 07:34:38
Exec Total Coverage
Lines: 314 398 78.9%
Functions: 13 14 92.9%
Branches: 162 229 70.7%
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 ✗ avpriv_request_sample(ctx->avctx, "alpha");
213
214 502 ctx->height = AV_RB16(buf + 0x18);
215 502 ctx->width = AV_RB16(buf + 0x1a);
216
217
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 502 switch(buf[0x21] >> 5) {
218 432 case 1: bitdepth = 8; break;
219 68 case 2: bitdepth = 10; break;
220 2 case 3: bitdepth = 12; break;
221 ✗ default:
222 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
223 ✗ "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
224 ✗ return AVERROR_INVALIDDATA;
225 }
226
227 502 cid = AV_RB32(buf + 0x28);
228
229 502 ctx->avctx->profile = dnxhd_get_profile(cid);
230
231
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 502 if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
232 ✗ return ret;
233
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 502 if (ctx->mbaff && ctx->cid_table->cid != 1260)
234 ✗ av_log(ctx->avctx, AV_LOG_WARNING,
235 "Adaptive MB interlace flag in an unsupported profile.\n");
236
237
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 502 switch ((buf[0x2C] >> 1) & 3) {
238 502 case 0: frame->colorspace = AVCOL_SPC_BT709; break;
239 ✗ case 1: frame->colorspace = AVCOL_SPC_BT2020_NCL; break;
240 ✗ case 2: frame->colorspace = AVCOL_SPC_BT2020_CL; break;
241 ✗ case 3: frame->colorspace = AVCOL_SPC_UNSPECIFIED; break;
242 }
243
244 502 ctx->act = buf[0x2C] & 1;
245
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 502 if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
246 ✗ av_log(ctx->avctx, AV_LOG_WARNING,
247 "Adaptive color transform in an unsupported profile.\n");
248
249 502 ctx->is_444 = (buf[0x2C] >> 6) & 1;
250
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 502 if (ctx->is_444) {
251
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 2 if (bitdepth == 8) {
252 ✗ avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
253 ✗ return AVERROR_INVALIDDATA;
254
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 2 } else if (bitdepth == 10) {
255 2 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
256 2 ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
257
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 2 : AV_PIX_FMT_GBRP10;
258 } else {
259 ✗ ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
260 ✗ ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
261 ✗ : AV_PIX_FMT_GBRP12;
262 }
263
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 500 } else if (bitdepth == 12) {
264 2 ctx->decode_dct_block = dnxhd_decode_dct_block_12;
265 2 ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
266
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 498 } else if (bitdepth == 10) {
267
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 66 if (ctx->avctx->profile == AV_PROFILE_DNXHR_HQX)
268 ✗ ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
269 else
270 66 ctx->decode_dct_block = dnxhd_decode_dct_block_10;
271 66 ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
272 } else {
273 432 ctx->decode_dct_block = dnxhd_decode_dct_block_8;
274 432 ctx->pix_fmt = AV_PIX_FMT_YUV422P;
275 }
276
277 502 ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
278
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 502 if (ctx->bit_depth != old_bit_depth) {
279 148 ff_blockdsp_init(&ctx->bdsp);
280 148 ff_idctdsp_init(&ctx->idsp, ctx->avctx);
281 148 ff_permute_scantable(ctx->permutated_scantable, ff_zigzag_direct,
282 148 ctx->idsp.idct_permutation);
283 }
284
285 // make sure profile size constraints are respected
286 // DNx100 allows 1920->1440 and 1280->960 subsampling
287
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 502 if (ctx->width != ctx->cid_table->width &&
288
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 285 ctx->cid_table->width != DNXHD_VARIABLE) {
289 2 av_reduce(&ctx->avctx->sample_aspect_ratio.num,
290 2 &ctx->avctx->sample_aspect_ratio.den,
291 2 ctx->width, ctx->cid_table->width, 255);
292 2 ctx->width = ctx->cid_table->width;
293 }
294
295
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 502 if (buf_size < ctx->cid_table->coding_unit_size) {
296 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
297 ✗ buf_size, ctx->cid_table->coding_unit_size);
298 ✗ return AVERROR_INVALIDDATA;
299 }
300
301 502 ctx->mb_width = (ctx->width + 15)>> 4;
302 502 ctx->mb_height = AV_RB16(buf + 0x16c);
303
304
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 502 if ((ctx->height + 15) >> 4 == ctx->mb_height && (frame->flags & AV_FRAME_FLAG_INTERLACED))
305 134 ctx->height <<= 1;
306
307 502 av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
308
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 502 ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
309 ctx->bit_depth, ctx->mbaff, ctx->act);
310
311 // Newer format supports variable mb_scan_index sizes
312
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 502 if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
313 108 ctx->data_offset = 0x170 + (ctx->mb_height << 2);
314 } else {
315
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 394 if (ctx->mb_height > 68) {
316 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
317 "mb height too big: %d\n", ctx->mb_height);
318 ✗ return AVERROR_INVALIDDATA;
319 }
320 394 ctx->data_offset = 0x280;
321 }
322
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 502 if ((ctx->mb_height << !!(frame->flags & AV_FRAME_FLAG_INTERLACED)) > (ctx->height + 15) >> 4) {
323 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
324 "mb height too big: %d\n", ctx->mb_height);
325 ✗ return AVERROR_INVALIDDATA;
326 }
327
328
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 502 if (buf_size < ctx->data_offset) {
329 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
330 "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
331 ✗ return AVERROR_INVALIDDATA;
332 }
333
334
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 502 if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
335 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
336 "mb_height too big (%d > %zu).\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
337 ✗ return AVERROR_INVALIDDATA;
338 }
339
340
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 30675 for (i = 0; i < ctx->mb_height; i++) {
341 30173 ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
342 ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n",
343 i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
344
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 30173 if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
345 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
346 "invalid mb scan index (%"PRIu32" vs %u).\n",
347 ✗ ctx->mb_scan_index[i], buf_size - ctx->data_offset);
348 ✗ return AVERROR_INVALIDDATA;
349 }
350 }
351
352 502 return 0;
353 }
354
355 34743936 static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
356 RowContext *row,
357 int n,
358 int index_bits,
359 int level_bias,
360 int level_shift,
361 int dc_shift)
362 {
363 int i, j, index1, len, flags;
364 int level, component, sign;
365 const int *scale;
366 const uint8_t *weight_matrix;
367 34743936 const uint8_t *ac_info = ctx->cid_table->ac_info;
368 34743936 int16_t *block = row->blocks[n];
369 34743936 const int eob_index = ctx->cid_table->eob_index;
370 34743936 int ret = 0;
371 34743936 OPEN_READER(bs, &row->gb);
372
373 34743936 ctx->bdsp.clear_block(block);
374
375
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 34743936 if (!ctx->is_444) {
376
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 34591296 if (n & 2) {
377 17295648 component = 1 + (n & 1);
378 17295648 scale = row->chroma_scale;
379 17295648 weight_matrix = ctx->cid_table->chroma_weight;
380 } else {
381 17295648 component = 0;
382 17295648 scale = row->luma_scale;
383 17295648 weight_matrix = ctx->cid_table->luma_weight;
384 }
385 } else {
386 152640 component = (n >> 1) % 3;
387
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 152640 if (component) {
388 101760 scale = row->chroma_scale;
389 101760 weight_matrix = ctx->cid_table->chroma_weight;
390 } else {
391 50880 scale = row->luma_scale;
392 50880 weight_matrix = ctx->cid_table->luma_weight;
393 }
394 }
395
396 34743936 UPDATE_CACHE(bs, &row->gb);
397 34743936 GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
398
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 34743936 if (len < 0) {
399 ✗ ret = len;
400 ✗ goto error;
401 }
402
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 34743936 if (len) {
403 32365764 level = GET_CACHE(bs, &row->gb);
404 32365764 LAST_SKIP_BITS(bs, &row->gb, len);
405 32365764 sign = ~level >> 31;
406 32365764 level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
407 32365764 row->last_dc[component] += level * (1 << dc_shift);
408 }
409 34743936 block[0] = row->last_dc[component];
410
411 34743936 i = 0;
412
413 34743936 UPDATE_CACHE(bs, &row->gb);
414
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 34743936 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
415 DNXHD_VLC_BITS, 2);
416
417
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 176938749 while (index1 != eob_index) {
418 142194813 level = ac_info[2*index1+0];
419 142194813 flags = ac_info[2*index1+1];
420
421 142194813 sign = SHOW_SBITS(bs, &row->gb, 1);
422 142194813 SKIP_BITS(bs, &row->gb, 1);
423
424
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 142194813 if (flags & 1) {
425 2609257 level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
426 2609257 SKIP_BITS(bs, &row->gb, index_bits);
427 }
428
429
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 142194813 if (flags & 2) {
430 int run;
431 46521239 UPDATE_CACHE(bs, &row->gb);
432
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 46521239 GET_VLC(run, bs, &row->gb, ctx->run_vlc.table,
433 DNXHD_VLC_BITS, 2);
434 46521239 i += run;
435 }
436
437
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 142194813 if (++i > 63) {
438 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
439 ✗ ret = -1;
440 ✗ break;
441 }
442
443 142194813 j = ctx->permutated_scantable[i];
444 142194813 level *= scale[i];
445 142194813 level += scale[i] >> 1;
446
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 142194813 if (level_bias < 32 || weight_matrix[i] != level_bias)
447 117255751 level += level_bias; // 1<<(level_shift-1)
448 142194813 level >>= level_shift;
449
450 142194813 block[j] = (level ^ sign) - sign;
451
452 142194813 UPDATE_CACHE(bs, &row->gb);
453
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 142194813 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
454 DNXHD_VLC_BITS, 2);
455 }
456 34743936 error:
457 34743936 CLOSE_READER(bs, &row->gb);
458 34743936 return ret;
459 }
460
461 32375616 static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
462 RowContext *row, int n)
463 {
464 32375616 return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
465 }
466
467 2085120 static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
468 RowContext *row, int n)
469 {
470 2085120 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
471 }
472
473 152640 static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
474 RowContext *row, int n)
475 {
476 152640 return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
477 }
478
479 130560 static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
480 RowContext *row, int n)
481 {
482 130560 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
483 }
484
485 ✗ static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
486 RowContext *row, int n)
487 {
488 ✗ return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
489 }
490
491 4336632 static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
492 AVFrame *frame, int x, int y)
493 {
494 4336632 int shift1 = ctx->bit_depth >= 10;
495 4336632 int dct_linesize_luma = frame->linesize[0];
496 4336632 int dct_linesize_chroma = frame->linesize[1];
497 uint8_t *dest_y, *dest_u, *dest_v;
498 int dct_y_offset, dct_x_offset;
499 int qscale, i, act;
500 4336632 int interlaced_mb = 0;
501
502
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 4336632 if (ctx->mbaff) {
503 12240 interlaced_mb = get_bits1(&row->gb);
504 12240 qscale = get_bits(&row->gb, 10);
505 } else {
506 4324392 qscale = get_bits(&row->gb, 11);
507 }
508 4336632 act = get_bits1(&row->gb);
509
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 4336632 if (act) {
510
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 12720 if (!ctx->act) {
511 static int act_warned;
512 ✗ if (!act_warned) {
513 ✗ act_warned = 1;
514 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
515 "ACT flag set, in violation of frame header.\n");
516 }
517
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 12720 } else if (row->format == -1) {
518 2 row->format = act;
519
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 12718 } else if (row->format != act) {
520 ✗ row->format = 2; // Variable
521 }
522 }
523
524
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 4336632 if (qscale != row->last_qscale) {
525
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 23058555 for (i = 0; i < 64; i++) {
526 22703808 row->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
527 22703808 row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
528 }
529 354747 row->last_qscale = qscale;
530 }
531
532
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 39080568 for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
533
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 34743936 if (ctx->decode_dct_block(ctx, row, i) < 0)
534 ✗ return AVERROR_INVALIDDATA;
535 }
536
537
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 4336632 if (frame->flags & AV_FRAME_FLAG_INTERLACED) {
538 546720 dct_linesize_luma <<= 1;
539 546720 dct_linesize_chroma <<= 1;
540 }
541
542 4336632 dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
543 4336632 dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
544 4336632 dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
545
546
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 4336632 if ((frame->flags & AV_FRAME_FLAG_INTERLACED) && ctx->cur_field) {
547 273360 dest_y += frame->linesize[0];
548 273360 dest_u += frame->linesize[1];
549 273360 dest_v += frame->linesize[2];
550 }
551
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 4336632 if (interlaced_mb) {
552 3224 dct_linesize_luma <<= 1;
553 3224 dct_linesize_chroma <<= 1;
554 }
555
556
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 4336632 dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
557 4336632 dct_x_offset = 8 << shift1;
558
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 4336632 if (!ctx->is_444) {
559 4323912 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
560 4323912 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
561 4323912 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[4]);
562 4323912 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
563
564
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 4323912 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
565
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 4323912 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
566 4323912 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
567 4323912 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[3]);
568 4323912 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
569 4323912 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
570 }
571 } else {
572 12720 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
573 12720 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
574 12720 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[6]);
575 12720 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
576
577
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 12720 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
578
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 12720 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
579 12720 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
580 12720 ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, row->blocks[3]);
581 12720 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[8]);
582 12720 ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
583 12720 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[4]);
584 12720 ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, row->blocks[5]);
585 12720 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[10]);
586 12720 ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
587 }
588 }
589
590 4336632 return 0;
591 }
592
593 30173 static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
594 int rownb, int threadnb)
595 {
596 30173 const DNXHDContext *ctx = avctx->priv_data;
597 30173 uint32_t offset = ctx->mb_scan_index[rownb];
598 30173 RowContext *row = ctx->rows + threadnb;
599 int x, ret;
600
601 30173 row->last_dc[0] =
602 30173 row->last_dc[1] =
603 30173 row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
604 30173 ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset);
605
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 30173 if (ret < 0) {
606 ✗ row->errors++;
607 ✗ return ret;
608 }
609
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 4366805 for (x = 0; x < ctx->mb_width; x++) {
610 4336632 int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
611
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 4336632 if (ret < 0) {
612 ✗ row->errors++;
613 ✗ return ret;
614 }
615 }
616
617 30173 return 0;
618 }
619
620 435 static int dnxhd_decode_frame(AVCodecContext *avctx, AVFrame *picture,
621 int *got_frame, AVPacket *avpkt)
622 {
623 435 const uint8_t *buf = avpkt->data;
624 435 int buf_size = avpkt->size;
625 435 DNXHDContext *ctx = avctx->priv_data;
626 435 int first_field = 1;
627 int ret, i;
628
629 ff_dlog(avctx, "frame size %d\n", buf_size);
630
631
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 870 for (i = 0; i < avctx->thread_count; i++)
632 435 ctx->rows[i].format = -1;
633
634 435 decode_coding_unit:
635
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 502 if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
636 ✗ return ret;
637
638
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 502 if ((avctx->width || avctx->height) &&
639
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 456 (ctx->width != avctx->width || ctx->height != avctx->height)) {
640 ✗ av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
641 avctx->width, avctx->height, ctx->width, ctx->height);
642 ✗ first_field = 1;
643 }
644
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 502 if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
645 ✗ av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
646 av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
647 ✗ first_field = 1;
648 }
649
650 502 avctx->pix_fmt = ctx->pix_fmt;
651 502 ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
652
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 502 if (ret < 0)
653 ✗ return ret;
654
655
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 502 if (first_field) {
656
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 435 if ((ret = ff_thread_get_buffer(avctx, picture, 0)) < 0)
657 ✗ return ret;
658 }
659
660 502 ctx->buf_size = buf_size - ctx->data_offset;
661 502 ctx->buf = buf + ctx->data_offset;
662 502 avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
663
664
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 502 if (first_field && (picture->flags & AV_FRAME_FLAG_INTERLACED)) {
665 67 buf += ctx->cid_table->coding_unit_size;
666 67 buf_size -= ctx->cid_table->coding_unit_size;
667 67 first_field = 0;
668 67 goto decode_coding_unit;
669 }
670
671 435 ret = 0;
672
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 870 for (i = 0; i < avctx->thread_count; i++) {
673 435 ret += ctx->rows[i].errors;
674 435 ctx->rows[i].errors = 0;
675 }
676
677
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 435 if (ctx->act) {
678 static int act_warned;
679 2 int format = ctx->rows[0].format;
680
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 2 for (i = 1; i < avctx->thread_count; i++) {
681 ✗ if (ctx->rows[i].format != format &&
682 ✗ ctx->rows[i].format != -1 /* not run */) {
683 ✗ format = 2;
684 ✗ break;
685 }
686 }
687
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 2 switch (format) {
688 ✗ case -1:
689 case 2:
690 ✗ if (!act_warned) {
691 ✗ act_warned = 1;
692 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
693 "Unsupported: variable ACT flag.\n");
694 }
695 ✗ break;
696 ✗ case 0:
697 ✗ ctx->pix_fmt = ctx->bit_depth==10
698 ✗ ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
699 ✗ break;
700 2 case 1:
701 4 ctx->pix_fmt = ctx->bit_depth==10
702
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 2 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
703 2 break;
704 }
705 }
706 435 avctx->pix_fmt = ctx->pix_fmt;
707
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 435 if (ret) {
708 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
709 ✗ return AVERROR_INVALIDDATA;
710 }
711
712 435 *got_frame = 1;
713 435 return avpkt->size;
714 }
715
716 149 static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
717 {
718 149 DNXHDContext *ctx = avctx->priv_data;
719
720 149 ff_vlc_free(&ctx->ac_vlc);
721 149 ff_vlc_free(&ctx->dc_vlc);
722 149 ff_vlc_free(&ctx->run_vlc);
723
724 149 av_freep(&ctx->rows);
725
726 149 return 0;
727 }
728
729 const FFCodec ff_dnxhd_decoder = {
730 .p.name = "dnxhd",
731 CODEC_LONG_NAME("VC3/DNxHD"),
732 .p.type = AVMEDIA_TYPE_VIDEO,
733 .p.id = AV_CODEC_ID_DNXHD,
734 .priv_data_size = sizeof(DNXHDContext),
735 .init = dnxhd_decode_init,
736 .close = dnxhd_decode_close,
737 FF_CODEC_DECODE_CB(dnxhd_decode_frame),
738 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
739 AV_CODEC_CAP_SLICE_THREADS,
740 .p.profiles = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
741 };
742