FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/dovi_rpudec.c
Date: 2025-12-07 22:02:57
Exec Total Coverage
Lines: 213 468 45.5%
Functions: 6 10 60.0%
Branches: 113 299 37.8%
Line Branch Exec Source
1 /*
2 * Dolby Vision RPU decoder
3 *
4 * Copyright (C) 2021 Jan Ekström
5 * Copyright (C) 2021-2024 Niklas Haas
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #include "libavutil/mem.h"
25 #include "libavutil/crc.h"
26
27 #include "avcodec.h"
28 #include "dovi_rpu.h"
29 #include "golomb.h"
30 #include "get_bits.h"
31 #include "libavutil/refstruct.h"
32
33 10427 int ff_dovi_get_metadata(DOVIContext *s, AVDOVIMetadata **out_metadata)
34 {
35 AVDOVIMetadata *dovi;
36 size_t dovi_size;
37
38
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 10427 if (!s->mapping || !s->color)
39 10425 return 0; /* incomplete dovi metadata */
40
41 2 dovi = av_dovi_metadata_alloc(&dovi_size);
42
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 2 if (!dovi)
43 ✗ return AVERROR(ENOMEM);
44
45 /* Copy only the parts of these structs known to us at compiler-time. */
46 #define COPY(t, a, b, last) memcpy(a, b, offsetof(t, last) + sizeof((b)->last))
47 2 COPY(AVDOVIRpuDataHeader, av_dovi_get_header(dovi), &s->header, ext_mapping_idc_5_7);
48 2 COPY(AVDOVIDataMapping, av_dovi_get_mapping(dovi), s->mapping, nlq_pivots);
49 2 COPY(AVDOVIColorMetadata, av_dovi_get_color(dovi), s->color, source_diagonal);
50
51
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 2 if (s->ext_blocks) {
52 2 const DOVIExt *ext = s->ext_blocks;
53 2 size_t ext_sz = FFMIN(sizeof(AVDOVIDmData), dovi->ext_block_size);
54
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 2 for (int i = 0; i < ext->num_static; i++)
55 ✗ memcpy(av_dovi_get_ext(dovi, dovi->num_ext_blocks++), &ext->dm_static[i], ext_sz);
56
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 4 for (int i = 0; i < ext->num_dynamic; i++)
57 2 memcpy(av_dovi_get_ext(dovi, dovi->num_ext_blocks++), &ext->dm_dynamic[i], ext_sz);
58 }
59
60 2 *out_metadata = dovi;
61 2 return dovi_size;
62 }
63
64 10427 int ff_dovi_attach_side_data(DOVIContext *s, AVFrame *frame)
65 {
66 AVFrameSideData *sd;
67 AVDOVIMetadata *dovi;
68 AVBufferRef *buf;
69 int size;
70
71 10427 size = ff_dovi_get_metadata(s, &dovi);
72
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 10427 if (size <= 0)
73 10425 return size;
74
75 2 buf = av_buffer_create((uint8_t *) dovi, size, NULL, NULL, 0);
76
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 2 if (!buf) {
77 ✗ av_free(dovi);
78 ✗ return AVERROR(ENOMEM);
79 }
80
81 2 sd = av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_DOVI_METADATA, buf);
82
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 2 if (!sd) {
83 ✗ av_buffer_unref(&buf);
84 ✗ return AVERROR(ENOMEM);
85 }
86
87 2 return 0;
88 }
89
90 ✗ static inline uint64_t get_ue_coef(GetBitContext *gb, const AVDOVIRpuDataHeader *hdr)
91 {
92 uint64_t ipart;
93 union { uint32_t u32; float f32; } fpart;
94
95 ✗ switch (hdr->coef_data_type) {
96 ✗ case RPU_COEFF_FIXED:
97 ✗ ipart = get_ue_golomb_long(gb);
98 ✗ fpart.u32 = get_bits_long(gb, hdr->coef_log2_denom);
99 ✗ return (ipart << hdr->coef_log2_denom) | fpart.u32;
100
101 ✗ case RPU_COEFF_FLOAT:
102 ✗ fpart.u32 = get_bits_long(gb, 32);
103 ✗ return fpart.f32 * (1LL << hdr->coef_log2_denom);
104 }
105
106 ✗ return 0; /* unreachable */
107 }
108
109 136 static inline int64_t get_se_coef(GetBitContext *gb, const AVDOVIRpuDataHeader *hdr)
110 {
111 int64_t ipart;
112 union { uint32_t u32; float f32; } fpart;
113
114
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 136 switch (hdr->coef_data_type) {
115 136 case RPU_COEFF_FIXED:
116 136 ipart = get_se_golomb_long(gb);
117 136 fpart.u32 = get_bits_long(gb, hdr->coef_log2_denom);
118 136 return ipart * (1LL << hdr->coef_log2_denom) | fpart.u32;
119
120 ✗ case RPU_COEFF_FLOAT:
121 ✗ fpart.u32 = get_bits_long(gb, 32);
122 ✗ return fpart.f32 * (1LL << hdr->coef_log2_denom);
123 }
124
125 ✗ return 0; /* unreachable */
126 }
127
128 ✗ static inline unsigned get_variable_bits(GetBitContext *gb, int n)
129 {
130 ✗ unsigned int value = get_bits(gb, n);
131 ✗ int read_more = get_bits1(gb);
132 ✗ while (read_more) {
133 ✗ value = (value + 1) << n;
134 ✗ value |= get_bits(gb, n);
135 ✗ read_more = get_bits1(gb);
136 }
137 ✗ return value;
138 }
139
140 #define VALIDATE(VAR, MIN, MAX) \
141 do { \
142 if (VAR < MIN || VAR > MAX) { \
143 av_log(s->logctx, AV_LOG_ERROR, "RPU validation failed: " \
144 #MIN" <= "#VAR" = %d <= "#MAX"\n", (int) VAR); \
145 ff_dovi_ctx_unref(s); \
146 return AVERROR_INVALIDDATA; \
147 } \
148 } while (0)
149
150 2 static int parse_ext_v1(DOVIContext *s, GetBitContext *gb, AVDOVIDmData *dm)
151 {
152
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 2 switch (dm->level) {
153 2 case 1:
154 2 dm->l1.min_pq = get_bits(gb, 12);
155 2 dm->l1.max_pq = get_bits(gb, 12);
156 2 dm->l1.avg_pq = get_bits(gb, 12);
157 2 break;
158 ✗ case 2:
159 ✗ dm->l2.target_max_pq = get_bits(gb, 12);
160 ✗ dm->l2.trim_slope = get_bits(gb, 12);
161 ✗ dm->l2.trim_offset = get_bits(gb, 12);
162 ✗ dm->l2.trim_power = get_bits(gb, 12);
163 ✗ dm->l2.trim_chroma_weight = get_bits(gb, 12);
164 ✗ dm->l2.trim_saturation_gain = get_bits(gb, 12);
165 ✗ dm->l2.ms_weight = get_sbits(gb, 13);
166 ✗ VALIDATE(dm->l2.ms_weight, -1, 4095);
167 ✗ break;
168 ✗ case 4:
169 ✗ dm->l4.anchor_pq = get_bits(gb, 12);
170 ✗ dm->l4.anchor_power = get_bits(gb, 12);
171 ✗ break;
172 ✗ case 5:
173 ✗ dm->l5.left_offset = get_bits(gb, 13);
174 ✗ dm->l5.right_offset = get_bits(gb, 13);
175 ✗ dm->l5.top_offset = get_bits(gb, 13);
176 ✗ dm->l5.bottom_offset = get_bits(gb, 13);
177 ✗ break;
178 ✗ case 6:
179 ✗ dm->l6.max_luminance = get_bits(gb, 16);
180 ✗ dm->l6.min_luminance = get_bits(gb, 16);
181 ✗ dm->l6.max_cll = get_bits(gb, 16);
182 ✗ dm->l6.max_fall = get_bits(gb, 16);
183 ✗ break;
184 ✗ case 255:
185 ✗ dm->l255.dm_run_mode = get_bits(gb, 8);
186 ✗ dm->l255.dm_run_version = get_bits(gb, 8);
187 ✗ for (int i = 0; i < 4; i++)
188 ✗ dm->l255.dm_debug[i] = get_bits(gb, 8);
189 ✗ break;
190 ✗ default:
191 ✗ avpriv_request_sample(s->logctx, "Dolby Vision DM v1 level %u", dm->level);
192 }
193
194 2 return 0;
195 }
196
197 ✗ static AVCIExy get_cie_xy(GetBitContext *gb)
198 {
199 AVCIExy xy;
200 ✗ const int denom = 32767;
201 ✗ xy.x = av_make_q(get_sbits(gb, 16), denom);
202 ✗ xy.y = av_make_q(get_sbits(gb, 16), denom);
203 ✗ return xy;
204 }
205
206 ✗ static int parse_ext_v2(DOVIContext *s, GetBitContext *gb, AVDOVIDmData *dm,
207 int ext_block_length)
208 {
209 ✗ switch (dm->level) {
210 ✗ case 3:
211 ✗ dm->l3.min_pq_offset = get_bits(gb, 12);
212 ✗ dm->l3.max_pq_offset = get_bits(gb, 12);
213 ✗ dm->l3.avg_pq_offset = get_bits(gb, 12);
214 ✗ break;
215 ✗ case 8:
216 ✗ dm->l8.target_display_index = get_bits(gb, 8);
217 ✗ dm->l8.trim_slope = get_bits(gb, 12);
218 ✗ dm->l8.trim_offset = get_bits(gb, 12);
219 ✗ dm->l8.trim_power = get_bits(gb, 12);
220 ✗ dm->l8.trim_chroma_weight = get_bits(gb, 12);
221 ✗ dm->l8.trim_saturation_gain = get_bits(gb, 12);
222 ✗ dm->l8.ms_weight = get_bits(gb, 12);
223 ✗ if (ext_block_length < 12)
224 ✗ break;
225 ✗ dm->l8.target_mid_contrast = get_bits(gb, 12);
226 ✗ if (ext_block_length < 13)
227 ✗ break;
228 ✗ dm->l8.clip_trim = get_bits(gb, 12);
229 ✗ if (ext_block_length < 19)
230 ✗ break;
231 ✗ for (int i = 0; i < 6; i++)
232 ✗ dm->l8.saturation_vector_field[i] = get_bits(gb, 8);
233 ✗ if (ext_block_length < 25)
234 ✗ break;
235 ✗ for (int i = 0; i < 6; i++)
236 ✗ dm->l8.hue_vector_field[i] = get_bits(gb, 8);
237 ✗ break;
238 ✗ case 9:
239 ✗ dm->l9.source_primary_index = get_bits(gb, 8);
240 ✗ if (ext_block_length < 17)
241 ✗ break;
242 ✗ dm->l9.source_display_primaries.prim.r = get_cie_xy(gb);
243 ✗ dm->l9.source_display_primaries.prim.g = get_cie_xy(gb);
244 ✗ dm->l9.source_display_primaries.prim.b = get_cie_xy(gb);
245 ✗ dm->l9.source_display_primaries.wp = get_cie_xy(gb);
246 ✗ break;
247 ✗ case 10:
248 ✗ dm->l10.target_display_index = get_bits(gb, 8);
249 ✗ dm->l10.target_max_pq = get_bits(gb, 12);
250 ✗ dm->l10.target_min_pq = get_bits(gb, 12);
251 ✗ dm->l10.target_primary_index = get_bits(gb, 8);
252 ✗ if (ext_block_length < 21)
253 ✗ break;
254 ✗ dm->l10.target_display_primaries.prim.r = get_cie_xy(gb);
255 ✗ dm->l10.target_display_primaries.prim.g = get_cie_xy(gb);
256 ✗ dm->l10.target_display_primaries.prim.b = get_cie_xy(gb);
257 ✗ dm->l10.target_display_primaries.wp = get_cie_xy(gb);
258 ✗ break;
259 ✗ case 11:
260 ✗ dm->l11.content_type = get_bits(gb, 8);
261 ✗ dm->l11.whitepoint = get_bits(gb, 4);
262 ✗ dm->l11.reference_mode_flag = get_bits1(gb);
263 ✗ skip_bits(gb, 3); /* reserved */
264 ✗ dm->l11.sharpness = get_bits(gb, 2);
265 ✗ dm->l11.noise_reduction = get_bits(gb, 2);
266 ✗ dm->l11.mpeg_noise_reduction = get_bits(gb, 2);
267 ✗ dm->l11.frame_rate_conversion = get_bits(gb, 2);
268 ✗ dm->l11.brightness = get_bits(gb, 2);
269 ✗ dm->l11.color = get_bits(gb, 2);
270 ✗ break;
271 ✗ case 254:
272 ✗ dm->l254.dm_mode = get_bits(gb, 8);
273 ✗ dm->l254.dm_version_index = get_bits(gb, 8);
274 ✗ break;
275 ✗ default:
276 ✗ avpriv_request_sample(s->logctx, "Dolby Vision DM v2 level %u", dm->level);
277 }
278
279 ✗ return 0;
280 }
281
282 2 static int parse_ext_blocks(DOVIContext *s, GetBitContext *gb, int ver,
283 int compression, int err_recognition)
284 {
285 int num_ext_blocks, ext_block_length, start_pos, parsed_bits, ret;
286 2 DOVIExt *ext = s->ext_blocks;
287
288 2 num_ext_blocks = get_ue_golomb_31(gb);
289 2 align_get_bits(gb);
290
291
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 2 if (num_ext_blocks && !ext) {
292 1 ext = s->ext_blocks = av_refstruct_allocz(sizeof(*s->ext_blocks));
293
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 1 if (!ext)
294 ✗ return AVERROR(ENOMEM);
295 }
296
297
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 4 while (num_ext_blocks--) {
298 AVDOVIDmData dummy;
299 AVDOVIDmData *dm;
300 uint8_t level;
301
302 2 ext_block_length = get_ue_golomb_31(gb);
303 2 level = get_bits(gb, 8);
304 2 start_pos = get_bits_count(gb);
305
306
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 2 if (ff_dovi_rpu_extension_is_static(level)) {
307 ✗ if (compression) {
308 ✗ av_log(s->logctx, AV_LOG_WARNING, "Compressed DM RPU contains "
309 "static extension block level %d\n", level);
310 ✗ if (err_recognition & (AV_EF_AGGRESSIVE | AV_EF_EXPLODE))
311 ✗ return AVERROR_INVALIDDATA;
312 ✗ dm = &dummy;
313 } else {
314 ✗ if (ext->num_static >= FF_ARRAY_ELEMS(ext->dm_static))
315 ✗ return AVERROR_INVALIDDATA;
316 ✗ dm = &ext->dm_static[ext->num_static++];
317 }
318 } else {
319
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 2 if (ext->num_dynamic >= FF_ARRAY_ELEMS(ext->dm_dynamic))
320 ✗ return AVERROR_INVALIDDATA;
321 2 dm = &ext->dm_dynamic[ext->num_dynamic++];
322 }
323
324 2 memset(dm, 0, sizeof(*dm));
325 2 dm->level = level;
326
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 2 switch (ver) {
327 2 case 1: ret = parse_ext_v1(s, gb, dm); break;
328 ✗ case 2: ret = parse_ext_v2(s, gb, dm, ext_block_length); break;
329 ✗ default:
330 ✗ avpriv_request_sample(s->logctx, "Dolby Vision DM v%d", ver);
331 ✗ goto skip;
332 }
333
334
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 2 if (ret < 0)
335 ✗ return ret;
336
337 2 skip:
338 2 parsed_bits = get_bits_count(gb) - start_pos;
339
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 2 if (parsed_bits > ext_block_length * 8)
340 ✗ return AVERROR_INVALIDDATA;
341 2 skip_bits(gb, ext_block_length * 8 - parsed_bits);
342 }
343
344 2 return 0;
345 }
346
347 2 int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
348 int err_recognition)
349 {
350 2 AVDOVIRpuDataHeader *hdr = &s->header;
351 2 GetBitContext *gb = &(GetBitContext){0};
352 int ret;
353
354 uint8_t rpu_type;
355 uint8_t vdr_seq_info_present;
356 uint8_t vdr_dm_metadata_present;
357 2 uint8_t dm_compression = 0;
358 uint8_t use_prev_vdr_rpu;
359 uint8_t use_nlq;
360 uint8_t profile;
361
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 2 uint8_t compression = s->cfg.dv_profile ? s->cfg.dv_md_compression : 0;
362
363
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 2 if (rpu_size < 5)
364 ✗ return AVERROR_INVALIDDATA;
365
366 /* Container */
367
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 2 if (s->cfg.dv_profile == 10 /* dav1.10 */) {
368 /* DV inside AV1 reuses an EMDF container skeleton, but with fixed
369 * values - so we can effectively treat this as a magic byte sequence.
370 *
371 * The exact fields are, as follows:
372 * emdf_version : f(2) = 0
373 * key_id : f(3) = 6
374 * emdf_payload_id : f(5) = 31
375 * emdf_payload_id_ext : var(5) = 225
376 * smploffste : f(1) = 0
377 * duratione : f(1) = 0
378 * groupide : f(1) = 0
379 * codecdatae : f(1) = 0
380 * discard_unknown_payload : f(1) = 1
381 */
382 ✗ const unsigned header_magic = 0x01be6841u;
383 unsigned emdf_header, emdf_payload_size, emdf_protection;
384 ✗ if ((ret = init_get_bits8(gb, rpu, rpu_size)) < 0)
385 ✗ return ret;
386 ✗ emdf_header = get_bits_long(gb, 27);
387 ✗ VALIDATE(emdf_header, header_magic, header_magic);
388 ✗ emdf_payload_size = get_variable_bits(gb, 8);
389 ✗ VALIDATE(emdf_payload_size, 6, 512);
390 ✗ if (emdf_payload_size * 8 > get_bits_left(gb))
391 ✗ return AVERROR_INVALIDDATA;
392
393 /* The payload is not byte-aligned (off by *one* bit, curse Dolby),
394 * so copy into a fresh buffer to preserve byte alignment of the
395 * RPU struct */
396 ✗ av_fast_padded_malloc(&s->rpu_buf, &s->rpu_buf_sz, emdf_payload_size);
397 ✗ if (!s->rpu_buf)
398 ✗ return AVERROR(ENOMEM);
399 ✗ for (int i = 0; i < emdf_payload_size; i++)
400 ✗ s->rpu_buf[i] = get_bits(gb, 8);
401 ✗ rpu = s->rpu_buf;
402 ✗ rpu_size = emdf_payload_size;
403
404 /* Validate EMDF footer */
405 ✗ emdf_protection = get_bits(gb, 5 + 12);
406 ✗ VALIDATE(emdf_protection, 0x400, 0x400);
407 } else {
408 /* NAL unit with prefix and trailing zeroes */
409
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 2 VALIDATE(rpu[0], 25, 25); /* NAL prefix */
410 2 rpu++;
411 2 rpu_size--;
412 }
413
414
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 2 if ((ret = init_get_bits8(gb, rpu, rpu_size)) < 0)
415 ✗ return ret;
416
417 /* RPU header */
418 2 rpu_type = get_bits(gb, 6);
419
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 2 if (rpu_type != 2) {
420 ✗ av_log(s->logctx, AV_LOG_WARNING, "Unrecognized RPU type "
421 "%"PRIu8", ignoring\n", rpu_type);
422 ✗ return 0;
423 }
424
425 2 hdr->rpu_type = rpu_type;
426 2 hdr->rpu_format = get_bits(gb, 11);
427
428 /* Values specific to RPU type 2 */
429 2 hdr->vdr_rpu_profile = get_bits(gb, 4);
430 2 hdr->vdr_rpu_level = get_bits(gb, 4);
431
432 2 vdr_seq_info_present = get_bits1(gb);
433
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 2 if (vdr_seq_info_present) {
434 2 hdr->chroma_resampling_explicit_filter_flag = get_bits1(gb);
435 2 hdr->coef_data_type = get_bits(gb, 2);
436
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 2 VALIDATE(hdr->coef_data_type, RPU_COEFF_FIXED, RPU_COEFF_FLOAT);
437
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 2 switch (hdr->coef_data_type) {
438 2 case RPU_COEFF_FIXED:
439 2 hdr->coef_log2_denom = get_ue_golomb(gb);
440
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 2 VALIDATE(hdr->coef_log2_denom, 13, 32);
441 2 break;
442 ✗ case RPU_COEFF_FLOAT:
443 ✗ hdr->coef_log2_denom = 32; /* arbitrary, choose maximum precision */
444 ✗ break;
445 }
446
447 2 hdr->vdr_rpu_normalized_idc = get_bits(gb, 2);
448 2 hdr->bl_video_full_range_flag = get_bits1(gb);
449
450
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 2 if ((hdr->rpu_format & 0x700) == 0) {
451 2 int bl_bit_depth_minus8 = get_ue_golomb_31(gb);
452 2 int el_bit_depth_minus8 = get_ue_golomb_long(gb);
453 2 int vdr_bit_depth_minus8 = get_ue_golomb_31(gb);
454 /* ext_mapping_idc is in the upper 8 bits of el_bit_depth_minus8 */
455 2 int ext_mapping_idc = el_bit_depth_minus8 >> 8;
456 2 el_bit_depth_minus8 = el_bit_depth_minus8 & 0xFF;
457
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 2 VALIDATE(bl_bit_depth_minus8, 0, 8);
458
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 2 VALIDATE(el_bit_depth_minus8, 0, 8);
459
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 2 VALIDATE(ext_mapping_idc, 0, 0xFF);
460
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 2 VALIDATE(vdr_bit_depth_minus8, 0, 8);
461 2 hdr->bl_bit_depth = bl_bit_depth_minus8 + 8;
462 2 hdr->el_bit_depth = el_bit_depth_minus8 + 8;
463 2 hdr->ext_mapping_idc_0_4 = ext_mapping_idc & 0x1f; /* 5 bits */
464 2 hdr->ext_mapping_idc_5_7 = ext_mapping_idc >> 5;
465 2 hdr->vdr_bit_depth = vdr_bit_depth_minus8 + 8;
466 2 hdr->spatial_resampling_filter_flag = get_bits1(gb);
467 2 dm_compression = get_bits(gb, 3);
468 2 hdr->el_spatial_resampling_filter_flag = get_bits1(gb);
469 2 hdr->disable_residual_flag = get_bits1(gb);
470 } else {
471 ✗ avpriv_request_sample(s->logctx, "Unsupported RPU format 0x%x\n", hdr->rpu_format);
472 ✗ ff_dovi_ctx_unref(s);
473 ✗ return AVERROR_PATCHWELCOME;
474 }
475 } else {
476 /* lack of documentation/samples */
477 ✗ avpriv_request_sample(s->logctx, "Missing RPU VDR sequence info\n");
478 ✗ ff_dovi_ctx_unref(s);
479 ✗ return AVERROR_PATCHWELCOME;
480 }
481
482 2 vdr_dm_metadata_present = get_bits1(gb);
483
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 2 if (dm_compression > 1) {
484 /* It seems no device supports this */
485 ✗ av_log(s->logctx, AV_LOG_ERROR, "Dynamic metadata compression is not "
486 "yet implemented");
487 ✗ return AVERROR_PATCHWELCOME;
488
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 2 } else if (dm_compression && !vdr_dm_metadata_present) {
489 ✗ av_log(s->logctx, AV_LOG_ERROR, "Nonzero DM metadata compression method "
490 "but no DM metadata present");
491 ✗ return AVERROR_INVALIDDATA;
492 }
493
494 2 use_prev_vdr_rpu = get_bits1(gb);
495
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 2 use_nlq = (hdr->rpu_format & 0x700) == 0 && !hdr->disable_residual_flag;
496
497
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 2 profile = s->cfg.dv_profile ? s->cfg.dv_profile : ff_dovi_guess_profile_hevc(hdr);
498
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 2 if (profile == 5 && use_nlq) {
499 ✗ av_log(s->logctx, AV_LOG_ERROR, "Profile 5 RPUs should not use NLQ\n");
500 ✗ ff_dovi_ctx_unref(s);
501 ✗ return AVERROR_INVALIDDATA;
502 }
503
504
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 2 if (err_recognition & (AV_EF_COMPLIANT | AV_EF_CAREFUL)) {
505 ✗ if (profile < 8 && compression) {
506 ✗ av_log(s->logctx, AV_LOG_ERROR, "Profile %d RPUs should not use "
507 "metadata compression.", profile);
508 ✗ return AVERROR_INVALIDDATA;
509 }
510
511 ✗ if (use_prev_vdr_rpu && !compression) {
512 ✗ av_log(s->logctx, AV_LOG_ERROR, "Uncompressed RPUs should not have "
513 "use_prev_vdr_rpu=1\n");
514 ✗ return AVERROR_INVALIDDATA;
515 }
516
517 ✗ if (dm_compression && !compression) {
518 ✗ av_log(s->logctx, AV_LOG_ERROR, "Uncompressed RPUs should not use "
519 "dm_compression=%d\n", dm_compression);
520 ✗ return AVERROR_INVALIDDATA;
521 }
522 }
523
524
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 2 if (use_prev_vdr_rpu) {
525 ✗ int prev_vdr_rpu_id = get_ue_golomb_31(gb);
526 ✗ VALIDATE(prev_vdr_rpu_id, 0, DOVI_MAX_DM_ID);
527 ✗ if (!s->vdr[prev_vdr_rpu_id])
528 ✗ prev_vdr_rpu_id = 0;
529 ✗ if (!s->vdr[prev_vdr_rpu_id]) {
530 /* FIXME: Technically, the spec says that in this case we should
531 * synthesize "neutral" vdr metadata, but easier to just error
532 * out as this corner case is not hit in practice */
533 ✗ av_log(s->logctx, AV_LOG_ERROR, "Unknown previous RPU ID: %u\n",
534 prev_vdr_rpu_id);
535 ✗ ff_dovi_ctx_unref(s);
536 ✗ return AVERROR_INVALIDDATA;
537 }
538 ✗ s->mapping = s->vdr[prev_vdr_rpu_id];
539 } else {
540 AVDOVIDataMapping *mapping;
541 2 int vdr_rpu_id = get_ue_golomb_31(gb);
542
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 2 VALIDATE(vdr_rpu_id, 0, DOVI_MAX_DM_ID);
543
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 2 if (!s->vdr[vdr_rpu_id]) {
544 1 s->vdr[vdr_rpu_id] = av_refstruct_allocz(sizeof(AVDOVIDataMapping));
545
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 1 if (!s->vdr[vdr_rpu_id]) {
546 ✗ ff_dovi_ctx_unref(s);
547 ✗ return AVERROR(ENOMEM);
548 }
549 }
550
551 2 s->mapping = mapping = s->vdr[vdr_rpu_id];
552 2 mapping->vdr_rpu_id = vdr_rpu_id;
553 2 mapping->mapping_color_space = get_ue_golomb_31(gb);
554 2 mapping->mapping_chroma_format_idc = get_ue_golomb_31(gb);
555
556
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 8 for (int c = 0; c < 3; c++) {
557 6 AVDOVIReshapingCurve *curve = &mapping->curves[c];
558 6 int num_pivots_minus_2 = get_ue_golomb_31(gb);
559 6 int pivot = 0;
560
561
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 6 VALIDATE(num_pivots_minus_2, 0, AV_DOVI_MAX_PIECES - 1);
562 6 curve->num_pivots = num_pivots_minus_2 + 2;
563
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 32 for (int i = 0; i < curve->num_pivots; i++) {
564 26 pivot += get_bits(gb, hdr->bl_bit_depth);
565 26 curve->pivots[i] = av_clip_uint16(pivot);
566 }
567 }
568
569
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 2 if (use_nlq) {
570 ✗ int nlq_pivot = 0;
571 ✗ mapping->nlq_method_idc = get_bits(gb, 3);
572
573 ✗ for (int i = 0; i < 2; i++) {
574 ✗ nlq_pivot += get_bits(gb, hdr->bl_bit_depth);
575 ✗ mapping->nlq_pivots[i] = av_clip_uint16(nlq_pivot);
576 }
577
578 /**
579 * The patent mentions another legal value, NLQ_MU_LAW, but it's
580 * not documented anywhere how to parse or apply that type of NLQ.
581 */
582 ✗ VALIDATE(mapping->nlq_method_idc, 0, AV_DOVI_NLQ_LINEAR_DZ);
583 } else {
584 2 mapping->nlq_method_idc = AV_DOVI_NLQ_NONE;
585 }
586
587 2 mapping->num_x_partitions = get_ue_golomb_long(gb) + 1;
588 2 mapping->num_y_partitions = get_ue_golomb_long(gb) + 1;
589 /* End of rpu_data_header(), start of vdr_rpu_data_payload() */
590
591
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 8 for (int c = 0; c < 3; c++) {
592 6 AVDOVIReshapingCurve *curve = &mapping->curves[c];
593
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 26 for (int i = 0; i < curve->num_pivots - 1; i++) {
594 20 int mapping_idc = get_ue_golomb_31(gb);
595
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 20 VALIDATE(mapping_idc, 0, 1);
596 20 curve->mapping_idc[i] = mapping_idc;
597
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 20 switch (mapping_idc) {
598 16 case AV_DOVI_MAPPING_POLYNOMIAL: {
599 16 int poly_order_minus1 = get_ue_golomb_31(gb);
600
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 16 VALIDATE(poly_order_minus1, 0, 1);
601 16 curve->poly_order[i] = poly_order_minus1 + 1;
602
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 16 if (poly_order_minus1 == 0) {
603 ✗ int linear_interp_flag = get_bits1(gb);
604 ✗ if (linear_interp_flag) {
605 /* lack of documentation/samples */
606 ✗ avpriv_request_sample(s->logctx, "Dolby Vision "
607 "linear interpolation");
608 ✗ ff_dovi_ctx_unref(s);
609 ✗ return AVERROR_PATCHWELCOME;
610 }
611 }
612
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 64 for (int k = 0; k <= curve->poly_order[i]; k++)
613 48 curve->poly_coef[i][k] = get_se_coef(gb, hdr);
614 16 break;
615 }
616 4 case AV_DOVI_MAPPING_MMR: {
617 4 int mmr_order_minus1 = get_bits(gb, 2);
618
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 4 VALIDATE(mmr_order_minus1, 0, 2);
619 4 curve->mmr_order[i] = mmr_order_minus1 + 1;
620 4 curve->mmr_constant[i] = get_se_coef(gb, hdr);
621
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 16 for (int j = 0; j < curve->mmr_order[i]; j++) {
622
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 96 for (int k = 0; k < 7; k++)
623 84 curve->mmr_coef[i][j][k] = get_se_coef(gb, hdr);
624 }
625 4 break;
626 }
627 }
628 }
629 }
630
631
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 2 if (use_nlq) {
632 ✗ for (int c = 0; c < 3; c++) {
633 ✗ AVDOVINLQParams *nlq = &mapping->nlq[c];
634 ✗ nlq->nlq_offset = get_bits(gb, hdr->el_bit_depth);
635 ✗ nlq->vdr_in_max = get_ue_coef(gb, hdr);
636 ✗ switch (mapping->nlq_method_idc) {
637 ✗ case AV_DOVI_NLQ_LINEAR_DZ:
638 ✗ nlq->linear_deadzone_slope = get_ue_coef(gb, hdr);
639 ✗ nlq->linear_deadzone_threshold = get_ue_coef(gb, hdr);
640 ✗ break;
641 }
642 }
643 }
644 }
645
646
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 2 if (vdr_dm_metadata_present) {
647 AVDOVIColorMetadata *color;
648 2 int affected_dm_id = get_ue_golomb_31(gb);
649 2 int current_dm_id = get_ue_golomb_31(gb);
650
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 2 VALIDATE(affected_dm_id, 0, DOVI_MAX_DM_ID);
651
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 2 VALIDATE(current_dm_id, 0, DOVI_MAX_DM_ID);
652
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 2 if (affected_dm_id != current_dm_id) {
653 /* The spec does not explain these fields at all, and there is
654 * a lack of samples to understand how they're supposed to work,
655 * so just assert them being equal for now */
656 ✗ avpriv_request_sample(s->logctx, "affected/current_dm_metadata_id "
657 "mismatch? %u != %u\n", affected_dm_id, current_dm_id);
658 ✗ ff_dovi_ctx_unref(s);
659 ✗ return AVERROR_PATCHWELCOME;
660 }
661
662
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 2 if (!s->dm) {
663 1 s->dm = av_refstruct_allocz(sizeof(AVDOVIColorMetadata));
664
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 1 if (!s->dm) {
665 ✗ ff_dovi_ctx_unref(s);
666 ✗ return AVERROR(ENOMEM);
667 }
668 }
669
670 2 s->color = color = s->dm;
671 2 color->dm_metadata_id = affected_dm_id;
672 2 color->scene_refresh_flag = get_ue_golomb_31(gb);
673
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 2 if (!dm_compression) {
674
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 20 for (int i = 0; i < 9; i++)
675 18 color->ycc_to_rgb_matrix[i] = av_make_q(get_sbits(gb, 16), 1 << 13);
676
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 8 for (int i = 0; i < 3; i++) {
677
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 6 int denom = profile == 4 ? (1 << 30) : (1 << 28);
678 6 unsigned offset = get_bits_long(gb, 32);
679
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 6 if (offset > INT_MAX) {
680 /* Ensure the result fits inside AVRational */
681 ✗ offset >>= 1;
682 ✗ denom >>= 1;
683 }
684 6 color->ycc_to_rgb_offset[i] = av_make_q(offset, denom);
685 }
686
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 20 for (int i = 0; i < 9; i++)
687 18 color->rgb_to_lms_matrix[i] = av_make_q(get_sbits(gb, 16), 1 << 14);
688
689 2 color->signal_eotf = get_bits(gb, 16);
690 2 color->signal_eotf_param0 = get_bits(gb, 16);
691 2 color->signal_eotf_param1 = get_bits(gb, 16);
692 2 color->signal_eotf_param2 = get_bits_long(gb, 32);
693 2 color->signal_bit_depth = get_bits(gb, 5);
694
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 2 VALIDATE(color->signal_bit_depth, 8, 16);
695 2 color->signal_color_space = get_bits(gb, 2);
696 2 color->signal_chroma_format = get_bits(gb, 2);
697 2 color->signal_full_range_flag = get_bits(gb, 2);
698 2 color->source_min_pq = get_bits(gb, 12);
699 2 color->source_max_pq = get_bits(gb, 12);
700 2 color->source_diagonal = get_bits(gb, 10);
701 }
702
703 /* Parse extension blocks */
704
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 2 if (s->ext_blocks) {
705 1 DOVIExt *ext = s->ext_blocks;
706
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 1 if (!dm_compression)
707 1 ext->num_static = 0;
708 1 ext->num_dynamic = 0;
709 }
710
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 2 if ((ret = parse_ext_blocks(s, gb, 1, dm_compression, err_recognition)) < 0) {
711 ✗ ff_dovi_ctx_unref(s);
712 ✗ return ret;
713 }
714
715
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 2 if (get_bits_left(gb) > 48 /* padding + CRC32 + terminator */) {
716 ✗ if ((ret = parse_ext_blocks(s, gb, 2, dm_compression, err_recognition)) < 0) {
717 ✗ ff_dovi_ctx_unref(s);
718 ✗ return ret;
719 }
720 }
721 } else {
722 ✗ s->color = &ff_dovi_color_default;
723 ✗ av_refstruct_unref(&s->ext_blocks);
724 }
725
726 2 align_get_bits(gb);
727 2 skip_bits(gb, 32); /* CRC32 */
728
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 2 if (get_bits(gb, 8) != 0x80) {
729 ✗ avpriv_request_sample(s->logctx, "Unexpected RPU format");
730 ✗ ff_dovi_ctx_unref(s);
731 ✗ return AVERROR_PATCHWELCOME;
732 }
733
734
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 2 if (err_recognition & AV_EF_CRCCHECK) {
735 ✗ rpu_size = get_bits_count(gb) / 8;
736 ✗ uint32_t crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
737 -1, rpu, rpu_size - 1)); /* exclude 0x80 */
738 ✗ if (crc) {
739 ✗ av_log(s->logctx, AV_LOG_ERROR, "RPU CRC mismatch: %X\n", crc);
740 ✗ if (err_recognition & AV_EF_EXPLODE) {
741 ✗ ff_dovi_ctx_unref(s);
742 ✗ return AVERROR_INVALIDDATA;
743 }
744 }
745 }
746
747 2 return 0;
748 }
749