FFmpeg: libavcodec/hevc_ps.c Source File

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libavcodec

hevc_ps.c

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1 /*

2 * HEVC Parameter Set decoding

3 *

8 *

9 * This file is part of FFmpeg.

10 *

11 * FFmpeg is free software; you can redistribute it and/or

12 * modify it under the terms of the GNU Lesser General Public

13 * License as published by the Free Software Foundation; either

14 * version 2.1 of the License, or (at your option) any later version.

15 *

16 * FFmpeg is distributed in the hope that it will be useful,

17 * but WITHOUT ANY WARRANTY; without even the implied warranty of

18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

19 * Lesser General Public License for more details.

20 *

21 * You should have received a copy of the GNU Lesser General Public

22 * License along with FFmpeg; if not, write to the Free Software

23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

24 */

26 #include "libavutil/imgutils.h"

27 #include "golomb.h"

28 #include "hevc.h"

30 static const uint8_t default_scaling_list_intra[] = {

31 16, 16, 16, 16, 17, 18, 21, 24,

32 16, 16, 16, 16, 17, 19, 22, 25,

33 16, 16, 17, 18, 20, 22, 25, 29,

34 16, 16, 18, 21, 24, 27, 31, 36,

35 17, 17, 20, 24, 30, 35, 41, 47,

36 18, 19, 22, 27, 35, 44, 54, 65,

37 21, 22, 25, 31, 41, 54, 70, 88,

38 24, 25, 29, 36, 47, 65, 88, 115

39 };

41 static const uint8_t default_scaling_list_inter[] = {

42 16, 16, 16, 16, 17, 18, 20, 24,

43 16, 16, 16, 17, 18, 20, 24, 25,

44 16, 16, 17, 18, 20, 24, 25, 28,

45 16, 17, 18, 20, 24, 25, 28, 33,

46 17, 18, 20, 24, 25, 28, 33, 41,

47 18, 20, 24, 25, 28, 33, 41, 54,

48 20, 24, 25, 28, 33, 41, 54, 71,

49 24, 25, 28, 33, 41, 54, 71, 91

50 };

52 static const AVRational vui_sar[] = {

53 { 0, 1 },

54 { 1, 1 },

55 { 12, 11 },

56 { 10, 11 },

57 { 16, 11 },

58 { 40, 33 },

59 { 24, 11 },

60 { 20, 11 },

61 { 32, 11 },

62 { 80, 33 },

63 { 18, 11 },

64 { 15, 11 },

65 { 64, 33 },

66 { 160, 99 },

67 { 4, 3 },

68 { 3, 2 },

69 { 2, 1 },

70 };

72 int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps,

73 const HEVCSPS *sps, int is_slice_header)

74 {

75 HEVCLocalContext *lc = s->HEVClc;

76 uint8_t rps_predict = 0;

77 int delta_poc;

78 int k0 = 0;

79 int k1 = 0;

80 int k = 0;

81 int i;

83 GetBitContext *gb = &lc->gb;

85 if (rps != sps->st_rps && sps->nb_st_rps)

86 rps_predict = get_bits1(gb);

88 if (rps_predict) {

89 const ShortTermRPS *rps_ridx;

90 int delta_rps;

91 unsigned abs_delta_rps;

92 uint8_t use_delta_flag = 0;

93 uint8_t delta_rps_sign;

95 if (is_slice_header) {

96 unsigned int delta_idx = get_ue_golomb_long(gb) + 1;

97 if (delta_idx > sps->nb_st_rps) {

98 av_log(s->avctx, AV_LOG_ERROR,

99 "Invalid value of delta_idx in slice header RPS: %d > %d.\n",

100 delta_idx, sps->nb_st_rps);

101 return AVERROR_INVALIDDATA;

102 }

103 rps_ridx = &sps->st_rps[sps->nb_st_rps - delta_idx];

104 } else

105 rps_ridx = &sps->st_rps[rps - sps->st_rps - 1];

106

107 delta_rps_sign = get_bits1(gb);

108 abs_delta_rps = get_ue_golomb_long(gb) + 1;

109 if (abs_delta_rps < 1 || abs_delta_rps > 32768) {

110 av_log(s->avctx, AV_LOG_ERROR,

111 "Invalid value of abs_delta_rps: %d\n",

112 abs_delta_rps);

113 return AVERROR_INVALIDDATA;

114 }

115 delta_rps = (1 - (delta_rps_sign << 1)) * abs_delta_rps;

116 for (i = 0; i <= rps_ridx->num_delta_pocs; i++) {

117 int used = rps->used[k] = get_bits1(gb);

118

119 if (!used)

120 use_delta_flag = get_bits1(gb);

121

122 if (used || use_delta_flag) {

123 if (i < rps_ridx->num_delta_pocs)

124 delta_poc = delta_rps + rps_ridx->delta_poc[i];

125 else

126 delta_poc = delta_rps;

127 rps->delta_poc[k] = delta_poc;

128 if (delta_poc < 0)

129 k0++;

130 else

131 k1++;

132 k++;

133 }

134 }

135

136 rps->num_delta_pocs = k;

137 rps->num_negative_pics = k0;

138 // sort in increasing order (smallest first)

139 if (rps->num_delta_pocs != 0) {

140 int used, tmp;

141 for (i = 1; i < rps->num_delta_pocs; i++) {

142 delta_poc = rps->delta_poc[i];

143 used = rps->used[i];

144 for (k = i - 1; k >= 0; k--) {

145 tmp = rps->delta_poc[k];

146 if (delta_poc < tmp) {

147 rps->delta_poc[k + 1] = tmp;

148 rps->used[k + 1] = rps->used[k];

149 rps->delta_poc[k] = delta_poc;

150 rps->used[k] = used;

151 }

152 }

153 }

154 }

155 if ((rps->num_negative_pics >> 1) != 0) {

156 int used;

157 k = rps->num_negative_pics - 1;

158 // flip the negative values to largest first

159 for (i = 0; i < rps->num_negative_pics >> 1; i++) {

160 delta_poc = rps->delta_poc[i];

161 used = rps->used[i];

162 rps->delta_poc[i] = rps->delta_poc[k];

163 rps->used[i] = rps->used[k];

164 rps->delta_poc[k] = delta_poc;

165 rps->used[k] = used;

166 k--;

167 }

168 }

169 } else {

170 unsigned int prev, nb_positive_pics;

171 rps->num_negative_pics = get_ue_golomb_long(gb);

172 nb_positive_pics = get_ue_golomb_long(gb);

173

174 if (rps->num_negative_pics >= MAX_REFS ||

175 nb_positive_pics >= MAX_REFS) {

176 av_log(s->avctx, AV_LOG_ERROR, "Too many refs in a short term RPS.\n");

177 return AVERROR_INVALIDDATA;

178 }

179

180 rps->num_delta_pocs = rps->num_negative_pics + nb_positive_pics;

181 if (rps->num_delta_pocs) {

182 prev = 0;

183 for (i = 0; i < rps->num_negative_pics; i++) {

184 delta_poc = get_ue_golomb_long(gb) + 1;

185 prev -= delta_poc;

186 rps->delta_poc[i] = prev;

187 rps->used[i] = get_bits1(gb);

188 }

189 prev = 0;

190 for (i = 0; i < nb_positive_pics; i++) {

191 delta_poc = get_ue_golomb_long(gb) + 1;

192 prev += delta_poc;

193 rps->delta_poc[rps->num_negative_pics + i] = prev;

194 rps->used[rps->num_negative_pics + i] = get_bits1(gb);

195 }

196 }

197 }

198 return 0;

199 }

200

201

202 static int decode_profile_tier_level(HEVCContext *s, PTLCommon *ptl)

203 {

204 int i;

205 HEVCLocalContext *lc = s->HEVClc;

206 GetBitContext *gb = &lc->gb;

207

208 if (get_bits_left(gb) < 2+1+5 + 32 + 4 + 16 + 16 + 12)

209 return -1;

210

211 ptl->profile_space = get_bits(gb, 2);

212 ptl->tier_flag = get_bits1(gb);

213 ptl->profile_idc = get_bits(gb, 5);

214 if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN)

215 av_log(s->avctx, AV_LOG_DEBUG, "Main profile bitstream\n");

216 else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_10)

217 av_log(s->avctx, AV_LOG_DEBUG, "Main 10 profile bitstream\n");

218 else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_STILL_PICTURE)

219 av_log(s->avctx, AV_LOG_DEBUG, "Main Still Picture profile bitstream\n");

220 else if (ptl->profile_idc == FF_PROFILE_HEVC_REXT)

221 av_log(s->avctx, AV_LOG_DEBUG, "Range Extension profile bitstream\n");

222 else

223 av_log(s->avctx, AV_LOG_WARNING, "Unknown HEVC profile: %d\n", ptl->profile_idc);

224

225 for (i = 0; i < 32; i++)

226 ptl->profile_compatibility_flag[i] = get_bits1(gb);

227 ptl->progressive_source_flag = get_bits1(gb);

228 ptl->interlaced_source_flag = get_bits1(gb);

229 ptl->non_packed_constraint_flag = get_bits1(gb);

230 ptl->frame_only_constraint_flag = get_bits1(gb);

231

232 skip_bits(gb, 16); // XXX_reserved_zero_44bits[0..15]

233 skip_bits(gb, 16); // XXX_reserved_zero_44bits[16..31]

234 skip_bits(gb, 12); // XXX_reserved_zero_44bits[32..43]

235

236 return 0;

237 }

238

239 static int parse_ptl(HEVCContext *s, PTL *ptl, int max_num_sub_layers)

240 {

241 int i;

242 HEVCLocalContext *lc = s->HEVClc;

243 GetBitContext *gb = &lc->gb;

244 if (decode_profile_tier_level(s, &ptl->general_ptl) < 0 ||

245 get_bits_left(gb) < 8 + 8*2) {

246 av_log(s->avctx, AV_LOG_ERROR, "PTL information too short\n");

247 return -1;

248 }

249

250 ptl->general_ptl.level_idc = get_bits(gb, 8);

251

252 for (i = 0; i < max_num_sub_layers - 1; i++) {

253 ptl->sub_layer_profile_present_flag[i] = get_bits1(gb);

254 ptl->sub_layer_level_present_flag[i] = get_bits1(gb);

255 }

256

257 if (max_num_sub_layers - 1> 0)

258 for (i = max_num_sub_layers - 1; i < 8; i++)

259 skip_bits(gb, 2); // reserved_zero_2bits[i]

260 for (i = 0; i < max_num_sub_layers - 1; i++) {

261 if (ptl->sub_layer_profile_present_flag[i] &&

262 decode_profile_tier_level(s, &ptl->sub_layer_ptl[i]) < 0) {

263 av_log(s->avctx, AV_LOG_ERROR,

264 "PTL information for sublayer %i too short\n", i);

265 return -1;

266 }

267 if (ptl->sub_layer_level_present_flag[i]) {

268 if (get_bits_left(gb) < 8) {

269 av_log(s->avctx, AV_LOG_ERROR,

270 "Not enough data for sublayer %i level_idc\n", i);

271 return -1;

272 } else

273 ptl->sub_layer_ptl[i].level_idc = get_bits(gb, 8);

274 }

275 }

276

277 return 0;

278 }

279

280 static void decode_sublayer_hrd(HEVCContext *s, unsigned int nb_cpb,

281 int subpic_params_present)

282 {

283 GetBitContext *gb = &s->HEVClc->gb;

284 int i;

285

286 for (i = 0; i < nb_cpb; i++) {

287 get_ue_golomb_long(gb); // bit_rate_value_minus1

288 get_ue_golomb_long(gb); // cpb_size_value_minus1

289

290 if (subpic_params_present) {

291 get_ue_golomb_long(gb); // cpb_size_du_value_minus1

292 get_ue_golomb_long(gb); // bit_rate_du_value_minus1

293 }

294 skip_bits1(gb); // cbr_flag

295 }

296 }

297

298 static int decode_hrd(HEVCContext *s, int common_inf_present,

299 int max_sublayers)

300 {

301 GetBitContext *gb = &s->HEVClc->gb;

302 int nal_params_present = 0, vcl_params_present = 0;

303 int subpic_params_present = 0;

304 int i;

305

306 if (common_inf_present) {

307 nal_params_present = get_bits1(gb);

308 vcl_params_present = get_bits1(gb);

309

310 if (nal_params_present || vcl_params_present) {

311 subpic_params_present = get_bits1(gb);

312

313 if (subpic_params_present) {

314 skip_bits(gb, 8); // tick_divisor_minus2

315 skip_bits(gb, 5); // du_cpb_removal_delay_increment_length_minus1

316 skip_bits(gb, 1); // sub_pic_cpb_params_in_pic_timing_sei_flag

317 skip_bits(gb, 5); // dpb_output_delay_du_length_minus1

318 }

319

320 skip_bits(gb, 4); // bit_rate_scale

321 skip_bits(gb, 4); // cpb_size_scale

322

323 if (subpic_params_present)

324 skip_bits(gb, 4); // cpb_size_du_scale

325

326 skip_bits(gb, 5); // initial_cpb_removal_delay_length_minus1

327 skip_bits(gb, 5); // au_cpb_removal_delay_length_minus1

328 skip_bits(gb, 5); // dpb_output_delay_length_minus1

329 }

330 }

331

332 for (i = 0; i < max_sublayers; i++) {

333 int low_delay = 0;

334 unsigned int nb_cpb = 1;

335 int fixed_rate = get_bits1(gb);

336

337 if (!fixed_rate)

338 fixed_rate = get_bits1(gb);

339

340 if (fixed_rate)

341 get_ue_golomb_long(gb); // elemental_duration_in_tc_minus1

342 else

343 low_delay = get_bits1(gb);

344

345 if (!low_delay) {

346 nb_cpb = get_ue_golomb_long(gb) + 1;

347 if (nb_cpb < 1 || nb_cpb > 32) {

348 av_log(s->avctx, AV_LOG_ERROR, "nb_cpb %d invalid\n", nb_cpb);

349 return AVERROR_INVALIDDATA;

350 }

351 }

352

353 if (nal_params_present)

354 decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

355 if (vcl_params_present)

356 decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

357 }

358 return 0;

359 }

360

361 int ff_hevc_decode_nal_vps(HEVCContext *s)

362 {

363 int i,j;

364 GetBitContext *gb = &s->HEVClc->gb;

365 int vps_id = 0;

366 HEVCVPS *vps;

367 AVBufferRef *vps_buf = av_buffer_allocz(sizeof(*vps));

368

369 if (!vps_buf)

370 return AVERROR(ENOMEM);

371 vps = (HEVCVPS*)vps_buf->data;

372

373 av_log(s->avctx, AV_LOG_DEBUG, "Decoding VPS\n");

374

375 vps_id = get_bits(gb, 4);

376 if (vps_id >= MAX_VPS_COUNT) {

377 av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", vps_id);

378 goto err;

379 }

380

381 if (get_bits(gb, 2) != 3) { // vps_reserved_three_2bits

382 av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_three_2bits is not three\n");

383 goto err;

384 }

385

386 vps->vps_max_layers = get_bits(gb, 6) + 1;

387 vps->vps_max_sub_layers = get_bits(gb, 3) + 1;

388 vps->vps_temporal_id_nesting_flag = get_bits1(gb);

389

390 if (get_bits(gb, 16) != 0xffff) { // vps_reserved_ffff_16bits

391 av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_ffff_16bits is not 0xffff\n");

392 goto err;

393 }

394

395 if (vps->vps_max_sub_layers > MAX_SUB_LAYERS) {

396 av_log(s->avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n",

397 vps->vps_max_sub_layers);

398 goto err;

399 }

400

401 if (parse_ptl(s, &vps->ptl, vps->vps_max_sub_layers) < 0)

402 goto err;

403

404 vps->vps_sub_layer_ordering_info_present_flag = get_bits1(gb);

405

406 i = vps->vps_sub_layer_ordering_info_present_flag ? 0 : vps->vps_max_sub_layers - 1;

407 for (; i < vps->vps_max_sub_layers; i++) {

408 vps->vps_max_dec_pic_buffering[i] = get_ue_golomb_long(gb) + 1;

409 vps->vps_num_reorder_pics[i] = get_ue_golomb_long(gb);

410 vps->vps_max_latency_increase[i] = get_ue_golomb_long(gb) - 1;

411

412 if (vps->vps_max_dec_pic_buffering[i] > MAX_DPB_SIZE || !vps->vps_max_dec_pic_buffering[i]) {

413 av_log(s->avctx, AV_LOG_ERROR, "vps_max_dec_pic_buffering_minus1 out of range: %d\n",

414 vps->vps_max_dec_pic_buffering[i] - 1);

415 goto err;

416 }

417 if (vps->vps_num_reorder_pics[i] > vps->vps_max_dec_pic_buffering[i] - 1) {

418 av_log(s->avctx, AV_LOG_WARNING, "vps_max_num_reorder_pics out of range: %d\n",

419 vps->vps_num_reorder_pics[i]);

420 if (s->avctx->err_recognition & AV_EF_EXPLODE)

421 goto err;

422 }

423 }

424

425 vps->vps_max_layer_id = get_bits(gb, 6);

426 vps->vps_num_layer_sets = get_ue_golomb_long(gb) + 1;

427 if ((vps->vps_num_layer_sets - 1LL) * (vps->vps_max_layer_id + 1LL) > get_bits_left(gb)) {

428 av_log(s->avctx, AV_LOG_ERROR, "too many layer_id_included_flags\n");

429 goto err;

430 }

431

432 for (i = 1; i < vps->vps_num_layer_sets; i++)

433 for (j = 0; j <= vps->vps_max_layer_id; j++)

434 skip_bits(gb, 1); // layer_id_included_flag[i][j]

435

436 vps->vps_timing_info_present_flag = get_bits1(gb);

437 if (vps->vps_timing_info_present_flag) {

438 vps->vps_num_units_in_tick = get_bits_long(gb, 32);

439 vps->vps_time_scale = get_bits_long(gb, 32);

440 vps->vps_poc_proportional_to_timing_flag = get_bits1(gb);

441 if (vps->vps_poc_proportional_to_timing_flag)

442 vps->vps_num_ticks_poc_diff_one = get_ue_golomb_long(gb) + 1;

443 vps->vps_num_hrd_parameters = get_ue_golomb_long(gb);

444 for (i = 0; i < vps->vps_num_hrd_parameters; i++) {

445 int common_inf_present = 1;

446

447 get_ue_golomb_long(gb); // hrd_layer_set_idx

448 if (i)

449 common_inf_present = get_bits1(gb);

450 decode_hrd(s, common_inf_present, vps->vps_max_sub_layers);

451 }

452 }

453 get_bits1(gb); /* vps_extension_flag */

454

455 if (get_bits_left(gb) < 0) {

456 av_log(s->avctx, AV_LOG_ERROR,

457 "Overread VPS by %d bits\n", -get_bits_left(gb));

458 goto err;

459 }

460

461 av_buffer_unref(&s->vps_list[vps_id]);

462 s->vps_list[vps_id] = vps_buf;

463 return 0;

464

465 err:

466 av_buffer_unref(&vps_buf);

467 return AVERROR_INVALIDDATA;

468 }

469

470 static void decode_vui(HEVCContext *s, HEVCSPS *sps)

471 {

472 VUI *vui = &sps->vui;

473 GetBitContext *gb = &s->HEVClc->gb;

474 GetBitContext backup;

475 int sar_present, alt = 0;

476

477 av_log(s->avctx, AV_LOG_DEBUG, "Decoding VUI\n");

478

479 sar_present = get_bits1(gb);

480 if (sar_present) {

481 uint8_t sar_idx = get_bits(gb, 8);

482 if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

483 vui->sar = vui_sar[sar_idx];

484 else if (sar_idx == 255) {

485 vui->sar.num = get_bits(gb, 16);

486 vui->sar.den = get_bits(gb, 16);

487 } else

488 av_log(s->avctx, AV_LOG_WARNING,

489 "Unknown SAR index: %u.\n", sar_idx);

490 }

491

492 vui->overscan_info_present_flag = get_bits1(gb);

493 if (vui->overscan_info_present_flag)

494 vui->overscan_appropriate_flag = get_bits1(gb);

495

496 vui->video_signal_type_present_flag = get_bits1(gb);

497 if (vui->video_signal_type_present_flag) {

498 vui->video_format = get_bits(gb, 3);

499 vui->video_full_range_flag = get_bits1(gb);

500 vui->colour_description_present_flag = get_bits1(gb);

501 if (vui->video_full_range_flag && sps->pix_fmt == AV_PIX_FMT_YUV420P)

502 sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

503 if (vui->colour_description_present_flag) {

504 vui->colour_primaries = get_bits(gb, 8);

505 vui->transfer_characteristic = get_bits(gb, 8);

506 vui->matrix_coeffs = get_bits(gb, 8);

507

508 // Set invalid values to "unspecified"

509 if (vui->colour_primaries >= AVCOL_PRI_NB)

510 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

511 if (vui->transfer_characteristic >= AVCOL_TRC_NB)

512 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

513 if (vui->matrix_coeffs >= AVCOL_SPC_NB)

514 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

515 }

516 }

517

518 vui->chroma_loc_info_present_flag = get_bits1(gb);

519 if (vui->chroma_loc_info_present_flag) {

520 vui->chroma_sample_loc_type_top_field = get_ue_golomb_long(gb);

521 vui->chroma_sample_loc_type_bottom_field = get_ue_golomb_long(gb);

522 }

523

524 vui->neutra_chroma_indication_flag = get_bits1(gb);

525 vui->field_seq_flag = get_bits1(gb);

526 vui->frame_field_info_present_flag = get_bits1(gb);

527

528 if (get_bits_left(gb) >= 68 && show_bits_long(gb, 21) == 0x100000) {

529 vui->default_display_window_flag = 0;

530 av_log(s->avctx, AV_LOG_WARNING, "Invalid default display window\n");

531 } else

532 vui->default_display_window_flag = get_bits1(gb);

533 // Backup context in case an alternate header is detected

534 memcpy(&backup, gb, sizeof(backup));

535

536 if (vui->default_display_window_flag) {

537 //TODO: * 2 is only valid for 420

538 vui->def_disp_win.left_offset = get_ue_golomb_long(gb) * 2;

539 vui->def_disp_win.right_offset = get_ue_golomb_long(gb) * 2;

540 vui->def_disp_win.top_offset = get_ue_golomb_long(gb) * 2;

541 vui->def_disp_win.bottom_offset = get_ue_golomb_long(gb) * 2;

542

543 if (s->apply_defdispwin &&

544 s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {

545 av_log(s->avctx, AV_LOG_DEBUG,

546 "discarding vui default display window, "

547 "original values are l:%u r:%u t:%u b:%u\n",

548 vui->def_disp_win.left_offset,

549 vui->def_disp_win.right_offset,

550 vui->def_disp_win.top_offset,

551 vui->def_disp_win.bottom_offset);

552

553 vui->def_disp_win.left_offset =

554 vui->def_disp_win.right_offset =

555 vui->def_disp_win.top_offset =

556 vui->def_disp_win.bottom_offset = 0;

557 }

558 }

559

560 vui->vui_timing_info_present_flag = get_bits1(gb);

561

562 if (vui->vui_timing_info_present_flag) {

563 if( get_bits_left(gb) < 66) {

564 // The alternate syntax seem to have timing info located

565 // at where def_disp_win is normally located

566 av_log(s->avctx, AV_LOG_WARNING,

567 "Strange VUI timing information, retrying...\n");

568 vui->default_display_window_flag = 0;

569 memset(&vui->def_disp_win, 0, sizeof(vui->def_disp_win));

570 memcpy(gb, &backup, sizeof(backup));

571 alt = 1;

572 }

573 vui->vui_num_units_in_tick = get_bits_long(gb, 32);

574 vui->vui_time_scale = get_bits_long(gb, 32);

575 if (alt) {

576 av_log(s->avctx, AV_LOG_INFO, "Retry got %i/%i fps\n",

577 vui->vui_time_scale, vui->vui_num_units_in_tick);

578 }

579 vui->vui_poc_proportional_to_timing_flag = get_bits1(gb);

580 if (vui->vui_poc_proportional_to_timing_flag)

581 vui->vui_num_ticks_poc_diff_one_minus1 = get_ue_golomb_long(gb);

582 vui->vui_hrd_parameters_present_flag = get_bits1(gb);

583 if (vui->vui_hrd_parameters_present_flag)

584 decode_hrd(s, 1, sps->max_sub_layers);

585 }

586

587 vui->bitstream_restriction_flag = get_bits1(gb);

588 if (vui->bitstream_restriction_flag) {

589 vui->tiles_fixed_structure_flag = get_bits1(gb);

590 vui->motion_vectors_over_pic_boundaries_flag = get_bits1(gb);

591 vui->restricted_ref_pic_lists_flag = get_bits1(gb);

592 vui->min_spatial_segmentation_idc = get_ue_golomb_long(gb);

593 vui->max_bytes_per_pic_denom = get_ue_golomb_long(gb);

594 vui->max_bits_per_min_cu_denom = get_ue_golomb_long(gb);

595 vui->log2_max_mv_length_horizontal = get_ue_golomb_long(gb);

596 vui->log2_max_mv_length_vertical = get_ue_golomb_long(gb);

597 }

598 }

599

600 static void set_default_scaling_list_data(ScalingList *sl)

601 {

602 int matrixId;

603

604 for (matrixId = 0; matrixId < 6; matrixId++) {

605 // 4x4 default is 16

606 memset(sl->sl[0][matrixId], 16, 16);

607 sl->sl_dc[0][matrixId] = 16; // default for 16x16

608 sl->sl_dc[1][matrixId] = 16; // default for 32x32

609 }

610 memcpy(sl->sl[1][0], default_scaling_list_intra, 64);

611 memcpy(sl->sl[1][1], default_scaling_list_intra, 64);

612 memcpy(sl->sl[1][2], default_scaling_list_intra, 64);

613 memcpy(sl->sl[1][3], default_scaling_list_inter, 64);

614 memcpy(sl->sl[1][4], default_scaling_list_inter, 64);

615 memcpy(sl->sl[1][5], default_scaling_list_inter, 64);

616 memcpy(sl->sl[2][0], default_scaling_list_intra, 64);

617 memcpy(sl->sl[2][1], default_scaling_list_intra, 64);

618 memcpy(sl->sl[2][2], default_scaling_list_intra, 64);

619 memcpy(sl->sl[2][3], default_scaling_list_inter, 64);

620 memcpy(sl->sl[2][4], default_scaling_list_inter, 64);

621 memcpy(sl->sl[2][5], default_scaling_list_inter, 64);

622 memcpy(sl->sl[3][0], default_scaling_list_intra, 64);

623 memcpy(sl->sl[3][1], default_scaling_list_intra, 64);

624 memcpy(sl->sl[3][2], default_scaling_list_intra, 64);

625 memcpy(sl->sl[3][3], default_scaling_list_inter, 64);

626 memcpy(sl->sl[3][4], default_scaling_list_inter, 64);

627 memcpy(sl->sl[3][5], default_scaling_list_inter, 64);

628 }

629

630 static int scaling_list_data(HEVCContext *s, ScalingList *sl, HEVCSPS *sps)

631 {

632 GetBitContext *gb = &s->HEVClc->gb;

633 uint8_t scaling_list_pred_mode_flag;

634 int32_t scaling_list_dc_coef[2][6];

635 int size_id, matrix_id, pos;

636 int i;

637

638 for (size_id = 0; size_id < 4; size_id++)

639 for (matrix_id = 0; matrix_id < 6; matrix_id += ((size_id == 3) ? 3 : 1)) {

640 scaling_list_pred_mode_flag = get_bits1(gb);

641 if (!scaling_list_pred_mode_flag) {

642 unsigned int delta = get_ue_golomb_long(gb);

643 /* Only need to handle non-zero delta. Zero means default,

644 * which should already be in the arrays. */

645 if (delta) {

646 // Copy from previous array.

647 if (matrix_id < delta) {

648 av_log(s->avctx, AV_LOG_ERROR,

649 "Invalid delta in scaling list data: %d.\n", delta);

650 return AVERROR_INVALIDDATA;

651 }

652

653 memcpy(sl->sl[size_id][matrix_id],

654 sl->sl[size_id][matrix_id - delta],

655 size_id > 0 ? 64 : 16);

656 if (size_id > 1)

657 sl->sl_dc[size_id - 2][matrix_id] = sl->sl_dc[size_id - 2][matrix_id - delta];

658 }

659 } else {

660 int next_coef, coef_num;

661 int32_t scaling_list_delta_coef;

662

663 next_coef = 8;

664 coef_num = FFMIN(64, 1 << (4 + (size_id << 1)));

665 if (size_id > 1) {

666 scaling_list_dc_coef[size_id - 2][matrix_id] = get_se_golomb(gb) + 8;

667 next_coef = scaling_list_dc_coef[size_id - 2][matrix_id];

668 sl->sl_dc[size_id - 2][matrix_id] = next_coef;

669 }

670 for (i = 0; i < coef_num; i++) {

671 if (size_id == 0)

672 pos = 4 * ff_hevc_diag_scan4x4_y[i] +

673 ff_hevc_diag_scan4x4_x[i];

674 else

675 pos = 8 * ff_hevc_diag_scan8x8_y[i] +

676 ff_hevc_diag_scan8x8_x[i];

677

678 scaling_list_delta_coef = get_se_golomb(gb);

679 next_coef = (next_coef + scaling_list_delta_coef + 256) % 256;

680 sl->sl[size_id][matrix_id][pos] = next_coef;

681 }

682 }

683 }

684

685 if (sps->chroma_format_idc == 3) {

686 for (i = 0; i < 64; i++) {

687 sl->sl[3][1][i] = sl->sl[2][1][i];

688 sl->sl[3][2][i] = sl->sl[2][2][i];

689 sl->sl[3][4][i] = sl->sl[2][4][i];

690 sl->sl[3][5][i] = sl->sl[2][5][i];

691 }

692 sl->sl_dc[1][1] = sl->sl_dc[0][1];

693 sl->sl_dc[1][2] = sl->sl_dc[0][2];

694 sl->sl_dc[1][4] = sl->sl_dc[0][4];

695 sl->sl_dc[1][5] = sl->sl_dc[0][5];

696 }

697

698

699 return 0;

700 }

701

702 int ff_hevc_decode_nal_sps(HEVCContext *s)

703 {

704 const AVPixFmtDescriptor *desc;

705 GetBitContext *gb = &s->HEVClc->gb;

706 int ret = 0;

707 unsigned int sps_id = 0;

708 int log2_diff_max_min_transform_block_size;

709 int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

710 int i;

711

712 HEVCSPS *sps;

713 AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

714

715 if (!sps_buf)

716 return AVERROR(ENOMEM);

717 sps = (HEVCSPS*)sps_buf->data;

718

719 av_log(s->avctx, AV_LOG_DEBUG, "Decoding SPS\n");

720

721 // Coded parameters

722

723 sps->vps_id = get_bits(gb, 4);

724 if (sps->vps_id >= MAX_VPS_COUNT) {

725 av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", sps->vps_id);

726 ret = AVERROR_INVALIDDATA;

727 goto err;

728 }

729

730 if (!s->vps_list[sps->vps_id]) {

731 av_log(s->avctx, AV_LOG_ERROR, "VPS %d does not exist\n",

732 sps->vps_id);

733 ret = AVERROR_INVALIDDATA;

734 goto err;

735 }

736

737 sps->max_sub_layers = get_bits(gb, 3) + 1;

738 if (sps->max_sub_layers > MAX_SUB_LAYERS) {

739 av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",

740 sps->max_sub_layers);

741 ret = AVERROR_INVALIDDATA;

742 goto err;

743 }

744

745 skip_bits1(gb); // temporal_id_nesting_flag

746

747 if (parse_ptl(s, &sps->ptl, sps->max_sub_layers) < 0)

748 goto err;

749

750 sps_id = get_ue_golomb_long(gb);

751 if (sps_id >= MAX_SPS_COUNT) {

752 av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", sps_id);

753 ret = AVERROR_INVALIDDATA;

754 goto err;

755 }

756

757 sps->chroma_format_idc = get_ue_golomb_long(gb);

758

759 if (sps->chroma_format_idc == 3)

760 sps->separate_colour_plane_flag = get_bits1(gb);

761

762 if (sps->separate_colour_plane_flag)

763 sps->chroma_format_idc = 0;

764

765 sps->width = get_ue_golomb_long(gb);

766 sps->height = get_ue_golomb_long(gb);

767 if ((ret = av_image_check_size(sps->width,

768 sps->height, 0, s->avctx)) < 0)

769 goto err;

770

771 if (get_bits1(gb)) { // pic_conformance_flag

772 //TODO: * 2 is only valid for 420

773 sps->pic_conf_win.left_offset = get_ue_golomb_long(gb) * 2;

774 sps->pic_conf_win.right_offset = get_ue_golomb_long(gb) * 2;

775 sps->pic_conf_win.top_offset = get_ue_golomb_long(gb) * 2;

776 sps->pic_conf_win.bottom_offset = get_ue_golomb_long(gb) * 2;

777

778 if (s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {

779 av_log(s->avctx, AV_LOG_DEBUG,

780 "discarding sps conformance window, "

781 "original values are l:%u r:%u t:%u b:%u\n",

782 sps->pic_conf_win.left_offset,

783 sps->pic_conf_win.right_offset,

784 sps->pic_conf_win.top_offset,

785 sps->pic_conf_win.bottom_offset);

786

787 sps->pic_conf_win.left_offset =

788 sps->pic_conf_win.right_offset =

789 sps->pic_conf_win.top_offset =

790 sps->pic_conf_win.bottom_offset = 0;

791 }

792 sps->output_window = sps->pic_conf_win;

793 }

794

795 sps->bit_depth = get_ue_golomb_long(gb) + 8;

796 bit_depth_chroma = get_ue_golomb_long(gb) + 8;

797 if (sps->chroma_format_idc && bit_depth_chroma != sps->bit_depth) {

798 av_log(s->avctx, AV_LOG_ERROR,

799 "Luma bit depth (%d) is different from chroma bit depth (%d), "

800 "this is unsupported.\n",

801 sps->bit_depth, bit_depth_chroma);

802 ret = AVERROR_INVALIDDATA;

803 goto err;

804 }

805

806 switch (sps->bit_depth) {

807 case 8:

808 if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY8;

809 if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P;

810 if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P;

811 if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P;

812 break;

813 case 9:

814 if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;

815 if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P9;

816 if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P9;

817 if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P9;

818 break;

819 case 10:

820 if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;

821 if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P10;

822 if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P10;

823 if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P10;

824 break;

825 case 12:

826 if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;

827 if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P12;

828 if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P12;

829 if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P12;

830 break;

831 default:

832 av_log(s->avctx, AV_LOG_ERROR,

833 "4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");

834 ret = AVERROR_PATCHWELCOME;

835 goto err;

836 }

837

838 desc = av_pix_fmt_desc_get(sps->pix_fmt);

839 if (!desc) {

840 ret = AVERROR(EINVAL);

841 goto err;

842 }

843

844 sps->hshift[0] = sps->vshift[0] = 0;

845 sps->hshift[2] = sps->hshift[1] = desc->log2_chroma_w;

846 sps->vshift[2] = sps->vshift[1] = desc->log2_chroma_h;

847

848 sps->pixel_shift = sps->bit_depth > 8;

849

850 sps->log2_max_poc_lsb = get_ue_golomb_long(gb) + 4;

851 if (sps->log2_max_poc_lsb > 16) {

852 av_log(s->avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n",

853 sps->log2_max_poc_lsb - 4);

854 ret = AVERROR_INVALIDDATA;

855 goto err;

856 }

857

858 sublayer_ordering_info = get_bits1(gb);

859 start = sublayer_ordering_info ? 0 : sps->max_sub_layers - 1;

860 for (i = start; i < sps->max_sub_layers; i++) {

861 sps->temporal_layer[i].max_dec_pic_buffering = get_ue_golomb_long(gb) + 1;

862 sps->temporal_layer[i].num_reorder_pics = get_ue_golomb_long(gb);

863 sps->temporal_layer[i].max_latency_increase = get_ue_golomb_long(gb) - 1;

864 if (sps->temporal_layer[i].max_dec_pic_buffering > MAX_DPB_SIZE) {

865 av_log(s->avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n",

866 sps->temporal_layer[i].max_dec_pic_buffering - 1);

867 ret = AVERROR_INVALIDDATA;

868 goto err;

869 }

870 if (sps->temporal_layer[i].num_reorder_pics > sps->temporal_layer[i].max_dec_pic_buffering - 1) {

871 av_log(s->avctx, AV_LOG_WARNING, "sps_max_num_reorder_pics out of range: %d\n",

872 sps->temporal_layer[i].num_reorder_pics);

873 if (s->avctx->err_recognition & AV_EF_EXPLODE ||

874 sps->temporal_layer[i].num_reorder_pics > MAX_DPB_SIZE - 1) {

875 ret = AVERROR_INVALIDDATA;

876 goto err;

877 }

878 sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[i].num_reorder_pics + 1;

879 }

880 }

881

882 if (!sublayer_ordering_info) {

883 for (i = 0; i < start; i++) {

884 sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[start].max_dec_pic_buffering;

885 sps->temporal_layer[i].num_reorder_pics = sps->temporal_layer[start].num_reorder_pics;

886 sps->temporal_layer[i].max_latency_increase = sps->temporal_layer[start].max_latency_increase;

887 }

888 }

889

890 sps->log2_min_cb_size = get_ue_golomb_long(gb) + 3;

891 sps->log2_diff_max_min_coding_block_size = get_ue_golomb_long(gb);

892 sps->log2_min_tb_size = get_ue_golomb_long(gb) + 2;

893 log2_diff_max_min_transform_block_size = get_ue_golomb_long(gb);

894 sps->log2_max_trafo_size = log2_diff_max_min_transform_block_size +

895 sps->log2_min_tb_size;

896

897 if (sps->log2_min_cb_size < 3 || sps->log2_min_cb_size > 30) {

898 av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_min_cb_size", sps->log2_min_cb_size);

899 ret = AVERROR_INVALIDDATA;

900 goto err;

901 }

902

903 if (sps->log2_diff_max_min_coding_block_size > 30) {

904 av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_coding_block_size", sps->log2_diff_max_min_coding_block_size);

905 ret = AVERROR_INVALIDDATA;

906 goto err;

907 }

908

909 if (sps->log2_min_tb_size >= sps->log2_min_cb_size || sps->log2_min_tb_size < 2) {

910 av_log(s->avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");

911 ret = AVERROR_INVALIDDATA;

912 goto err;

913 }

914

915 if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {

916 av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);

917 ret = AVERROR_INVALIDDATA;

918 goto err;

919 }

920

921 sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb);

922 sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb);

923

924 sps->scaling_list_enable_flag = get_bits1(gb);

925 if (sps->scaling_list_enable_flag) {

926 set_default_scaling_list_data(&sps->scaling_list);

927

928 if (get_bits1(gb)) {

929 ret = scaling_list_data(s, &sps->scaling_list, sps);

930 if (ret < 0)

931 goto err;

932 }

933 }

934

935 sps->amp_enabled_flag = get_bits1(gb);

936 sps->sao_enabled = get_bits1(gb);

937

938 sps->pcm_enabled_flag = get_bits1(gb);

939 if (sps->pcm_enabled_flag) {

940 sps->pcm.bit_depth = get_bits(gb, 4) + 1;

941 sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;

942 sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;

943 sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +

944 get_ue_golomb_long(gb);

945 if (sps->pcm.bit_depth > sps->bit_depth) {

946 av_log(s->avctx, AV_LOG_ERROR,

947 "PCM bit depth (%d) is greater than normal bit depth (%d)\n",

948 sps->pcm.bit_depth, sps->bit_depth);

949 ret = AVERROR_INVALIDDATA;

950 goto err;

951 }

952

953 sps->pcm.loop_filter_disable_flag = get_bits1(gb);

954 }

955

956 sps->nb_st_rps = get_ue_golomb_long(gb);

957 if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {

958 av_log(s->avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

959 sps->nb_st_rps);

960 ret = AVERROR_INVALIDDATA;

961 goto err;

962 }

963 for (i = 0; i < sps->nb_st_rps; i++) {

964 if ((ret = ff_hevc_decode_short_term_rps(s, &sps->st_rps[i],

965 sps, 0)) < 0)

966 goto err;

967 }

968

969 sps->long_term_ref_pics_present_flag = get_bits1(gb);

970 if (sps->long_term_ref_pics_present_flag) {

971 sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

972 if (sps->num_long_term_ref_pics_sps > 31U) {

973 av_log(s->avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",

974 sps->num_long_term_ref_pics_sps);

975 goto err;

976 }

977 for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

978 sps->lt_ref_pic_poc_lsb_sps[i] = get_bits(gb, sps->log2_max_poc_lsb);

979 sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

980 }

981 }

982

983 sps->sps_temporal_mvp_enabled_flag = get_bits1(gb);

984 sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);

985 sps->vui.sar = (AVRational){0, 1};

986 vui_present = get_bits1(gb);

987 if (vui_present)

988 decode_vui(s, sps);

989

990 if (get_bits1(gb)) { // sps_extension_flag

991 int sps_extension_flag[1];

992 for (i = 0; i < 1; i++)

993 sps_extension_flag[i] = get_bits1(gb);

994 skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

995 if (sps_extension_flag[0]) {

996 int extended_precision_processing_flag;

997 int high_precision_offsets_enabled_flag;

998 int cabac_bypass_alignment_enabled_flag;

999

1000 sps->transform_skip_rotation_enabled_flag = get_bits1(gb);

1001 sps->transform_skip_context_enabled_flag = get_bits1(gb);

1002 sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

1003

1004 sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

1005

1006 extended_precision_processing_flag = get_bits1(gb);

1007 if (extended_precision_processing_flag)

1008 av_log(s->avctx, AV_LOG_WARNING,

1009 "extended_precision_processing_flag not yet implemented\n");

1010

1011 sps->intra_smoothing_disabled_flag = get_bits1(gb);

1012 high_precision_offsets_enabled_flag = get_bits1(gb);

1013 if (high_precision_offsets_enabled_flag)

1014 av_log(s->avctx, AV_LOG_WARNING,

1015 "high_precision_offsets_enabled_flag not yet implemented\n");

1016

1017 sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

1018

1019 cabac_bypass_alignment_enabled_flag = get_bits1(gb);

1020 if (cabac_bypass_alignment_enabled_flag)

1021 av_log(s->avctx, AV_LOG_WARNING,

1022 "cabac_bypass_alignment_enabled_flag not yet implemented\n");

1023 }

1024 }

1025 if (s->apply_defdispwin) {

1026 sps->output_window.left_offset += sps->vui.def_disp_win.left_offset;

1027 sps->output_window.right_offset += sps->vui.def_disp_win.right_offset;

1028 sps->output_window.top_offset += sps->vui.def_disp_win.top_offset;

1029 sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

1030 }

1031 if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

1032 !(s->avctx->flags & CODEC_FLAG_UNALIGNED)) {

1033 sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

1034 av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d "

1035 "chroma samples to preserve alignment.\n",

1036 sps->output_window.left_offset);

1037 }

1038 sps->output_width = sps->width -

1039 (sps->output_window.left_offset + sps->output_window.right_offset);

1040 sps->output_height = sps->height -

1041 (sps->output_window.top_offset + sps->output_window.bottom_offset);

1042 if (sps->output_width <= 0 || sps->output_height <= 0) {

1043 av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

1044 sps->output_width, sps->output_height);

1045 if (s->avctx->err_recognition & AV_EF_EXPLODE) {

1046 ret = AVERROR_INVALIDDATA;

1047 goto err;

1048 }

1049 av_log(s->avctx, AV_LOG_WARNING,

1050 "Displaying the whole video surface.\n");

1051 memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

1052 memset(&sps->output_window, 0, sizeof(sps->output_window));

1053 sps->output_width = sps->width;

1054 sps->output_height = sps->height;

1055 }

1056

1057 // Inferred parameters

1058 sps->log2_ctb_size = sps->log2_min_cb_size +

1059 sps->log2_diff_max_min_coding_block_size;

1060 sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

1061

1062 sps->ctb_width = (sps->width + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

1063 sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

1064 sps->ctb_size = sps->ctb_width * sps->ctb_height;

1065

1066 sps->min_cb_width = sps->width >> sps->log2_min_cb_size;

1067 sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

1068 sps->min_tb_width = sps->width >> sps->log2_min_tb_size;

1069 sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

1070 sps->min_pu_width = sps->width >> sps->log2_min_pu_size;

1071 sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

1072 sps->tb_mask = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

1073

1074 sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

1075

1076 if (sps->width & ((1 << sps->log2_min_cb_size) - 1) ||

1077 sps->height & ((1 << sps->log2_min_cb_size) - 1)) {

1078 av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

1079 goto err;

1080 }

1081

1082 if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {

1083 av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

1084 goto err;

1085 }

1086 if (sps->log2_ctb_size < 4) {

1087 av_log(s->avctx,

1088 AV_LOG_ERROR,

1089 "log2_ctb_size %d differs from the bounds of any known profile\n",

1090 sps->log2_ctb_size);

1091 avpriv_request_sample(s->avctx, "log2_ctb_size %d", sps->log2_ctb_size);

1092 goto err;

1093 }

1094 if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

1095 av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

1096 sps->max_transform_hierarchy_depth_inter);

1097 goto err;

1098 }

1099 if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

1100 av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

1101 sps->max_transform_hierarchy_depth_intra);

1102 goto err;

1103 }

1104 if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

1105 av_log(s->avctx, AV_LOG_ERROR,

1106 "max transform block size out of range: %d\n",

1107 sps->log2_max_trafo_size);

1108 goto err;

1109 }

1110

1111 if (get_bits_left(gb) < 0) {

1112 av_log(s->avctx, AV_LOG_ERROR,

1113 "Overread SPS by %d bits\n", -get_bits_left(gb));

1114 goto err;

1115 }

1116

1117 if (s->avctx->debug & FF_DEBUG_BITSTREAM) {

1118 av_log(s->avctx, AV_LOG_DEBUG,

1119 "Parsed SPS: id %d; coded wxh: %dx%d; "

1120 "cropped wxh: %dx%d; pix_fmt: %s.\n",

1121 sps_id, sps->width, sps->height,

1122 sps->output_width, sps->output_height,

1123 av_get_pix_fmt_name(sps->pix_fmt));

1124 }

1125

1126 /* check if this is a repeat of an already parsed SPS, then keep the

1127 * original one.

1128 * otherwise drop all PPSes that depend on it */

1129 if (s->sps_list[sps_id] &&

1130 !memcmp(s->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

1131 av_buffer_unref(&sps_buf);

1132 } else {

1133 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++) {

1134 if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == sps_id)

1135 av_buffer_unref(&s->pps_list[i]);

1136 }

1137 if (s->sps_list[sps_id] && s->sps == (HEVCSPS*)s->sps_list[sps_id]->data) {

1138 av_buffer_unref(&s->current_sps);

1139 s->current_sps = av_buffer_ref(s->sps_list[sps_id]);

1140 if (!s->current_sps)

1141 s->sps = NULL;

1142 }

1143 av_buffer_unref(&s->sps_list[sps_id]);

1144 s->sps_list[sps_id] = sps_buf;

1145 }

1146

1147 return 0;

1148

1149 err:

1150 av_buffer_unref(&sps_buf);

1151 return ret;

1152 }

1153

1154 static void hevc_pps_free(void *opaque, uint8_t *data)

1155 {

1156 HEVCPPS *pps = (HEVCPPS*)data;

1157

1158 av_freep(&pps->column_width);

1159 av_freep(&pps->row_height);

1160 av_freep(&pps->col_bd);

1161 av_freep(&pps->row_bd);

1162 av_freep(&pps->col_idxX);

1163 av_freep(&pps->ctb_addr_rs_to_ts);

1164 av_freep(&pps->ctb_addr_ts_to_rs);

1165 av_freep(&pps->tile_pos_rs);

1166 av_freep(&pps->tile_id);

1167 av_freep(&pps->min_tb_addr_zs_tab);

1168

1169 av_freep(&pps);

1170 }

1171

1172 static int pps_range_extensions(HEVCContext *s, HEVCPPS *pps, HEVCSPS *sps) {

1173 GetBitContext *gb = &s->HEVClc->gb;

1174 int i;

1175

1176 if (pps->transform_skip_enabled_flag) {

1177 pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

1178 }

1179 pps->cross_component_prediction_enabled_flag = get_bits1(gb);

1180 pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);

1181 if (pps->chroma_qp_offset_list_enabled_flag) {

1182 pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

1183 pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

1184 if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

1185 av_log(s->avctx, AV_LOG_ERROR,

1186 "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

1187 return AVERROR_INVALIDDATA;

1188 }

1189 for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

1190 pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

1191 if (pps->cb_qp_offset_list[i]) {

1192 av_log(s->avctx, AV_LOG_WARNING,

1193 "cb_qp_offset_list not tested yet.\n");

1194 }

1195 pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

1196 if (pps->cr_qp_offset_list[i]) {

1197 av_log(s->avctx, AV_LOG_WARNING,

1198 "cb_qp_offset_list not tested yet.\n");

1199 }

1200 }

1201 }

1202 pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

1203 pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

1204

1205 return(0);

1206 }

1207

1208 int ff_hevc_decode_nal_pps(HEVCContext *s)

1209 {

1210 GetBitContext *gb = &s->HEVClc->gb;

1211 HEVCSPS *sps = NULL;

1212 int pic_area_in_ctbs;

1213 int log2_diff_ctb_min_tb_size;

1214 int i, j, x, y, ctb_addr_rs, tile_id;

1215 int ret = 0;

1216 unsigned int pps_id = 0;

1217

1218 AVBufferRef *pps_buf;

1219 HEVCPPS *pps = av_mallocz(sizeof(*pps));

1220

1221 if (!pps)

1222 return AVERROR(ENOMEM);

1223

1224 pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

1225 hevc_pps_free, NULL, 0);

1226 if (!pps_buf) {

1227 av_freep(&pps);

1228 return AVERROR(ENOMEM);

1229 }

1230

1231 av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");

1232

1233 // Default values

1234 pps->loop_filter_across_tiles_enabled_flag = 1;

1235 pps->num_tile_columns = 1;

1236 pps->num_tile_rows = 1;

1237 pps->uniform_spacing_flag = 1;

1238 pps->disable_dbf = 0;

1239 pps->beta_offset = 0;

1240 pps->tc_offset = 0;

1241 pps->log2_max_transform_skip_block_size = 2;

1242

1243 // Coded parameters

1244 pps_id = get_ue_golomb_long(gb);

1245 if (pps_id >= MAX_PPS_COUNT) {

1246 av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

1247 ret = AVERROR_INVALIDDATA;

1248 goto err;

1249 }

1250 pps->sps_id = get_ue_golomb_long(gb);

1251 if (pps->sps_id >= MAX_SPS_COUNT) {

1252 av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

1253 ret = AVERROR_INVALIDDATA;

1254 goto err;

1255 }

1256 if (!s->sps_list[pps->sps_id]) {

1257 av_log(s->avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

1258 ret = AVERROR_INVALIDDATA;

1259 goto err;

1260 }

1261 sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;

1262

1263 pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

1264 pps->output_flag_present_flag = get_bits1(gb);

1265 pps->num_extra_slice_header_bits = get_bits(gb, 3);

1266

1267 pps->sign_data_hiding_flag = get_bits1(gb);

1268

1269 pps->cabac_init_present_flag = get_bits1(gb);

1270

1271 pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

1272 pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

1273

1274 pps->pic_init_qp_minus26 = get_se_golomb(gb);

1275

1276 pps->constrained_intra_pred_flag = get_bits1(gb);

1277 pps->transform_skip_enabled_flag = get_bits1(gb);

1278

1279 pps->cu_qp_delta_enabled_flag = get_bits1(gb);

1280 pps->diff_cu_qp_delta_depth = 0;

1281 if (pps->cu_qp_delta_enabled_flag)

1282 pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

1283

1284 if (pps->diff_cu_qp_delta_depth < 0 ||

1285 pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

1286 av_log(s->avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

1287 pps->diff_cu_qp_delta_depth);

1288 ret = AVERROR_INVALIDDATA;

1289 goto err;

1290 }

1291

1292 pps->cb_qp_offset = get_se_golomb(gb);

1293 if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

1294 av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

1295 pps->cb_qp_offset);

1296 ret = AVERROR_INVALIDDATA;

1297 goto err;

1298 }

1299 pps->cr_qp_offset = get_se_golomb(gb);

1300 if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

1301 av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

1302 pps->cr_qp_offset);

1303 ret = AVERROR_INVALIDDATA;

1304 goto err;

1305 }

1306 pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

1307

1308 pps->weighted_pred_flag = get_bits1(gb);

1309 pps->weighted_bipred_flag = get_bits1(gb);

1310

1311 pps->transquant_bypass_enable_flag = get_bits1(gb);

1312 pps->tiles_enabled_flag = get_bits1(gb);

1313 pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

1314

1315 if (pps->tiles_enabled_flag) {

1316 pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

1317 pps->num_tile_rows = get_ue_golomb_long(gb) + 1;

1318 if (pps->num_tile_columns == 0 ||

1319 pps->num_tile_columns >= sps->width) {

1320 av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

1321 pps->num_tile_columns - 1);

1322 ret = AVERROR_INVALIDDATA;

1323 goto err;

1324 }

1325 if (pps->num_tile_rows == 0 ||

1326 pps->num_tile_rows >= sps->height) {

1327 av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

1328 pps->num_tile_rows - 1);

1329 ret = AVERROR_INVALIDDATA;

1330 goto err;

1331 }

1332

1333 pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

1334 pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height));

1335 if (!pps->column_width || !pps->row_height) {

1336 ret = AVERROR(ENOMEM);

1337 goto err;

1338 }

1339

1340 pps->uniform_spacing_flag = get_bits1(gb);

1341 if (!pps->uniform_spacing_flag) {

1342 uint64_t sum = 0;

1343 for (i = 0; i < pps->num_tile_columns - 1; i++) {

1344 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

1345 sum += pps->column_width[i];

1346 }

1347 if (sum >= sps->ctb_width) {

1348 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

1349 ret = AVERROR_INVALIDDATA;

1350 goto err;

1351 }

1352 pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

1353

1354 sum = 0;

1355 for (i = 0; i < pps->num_tile_rows - 1; i++) {

1356 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

1357 sum += pps->row_height[i];

1358 }

1359 if (sum >= sps->ctb_height) {

1360 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

1361 ret = AVERROR_INVALIDDATA;

1362 goto err;

1363 }

1364 pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

1365 }

1366 pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

1367 }

1368

1369 pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

1370

1371 pps->deblocking_filter_control_present_flag = get_bits1(gb);

1372 if (pps->deblocking_filter_control_present_flag) {

1373 pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

1374 pps->disable_dbf = get_bits1(gb);

1375 if (!pps->disable_dbf) {

1376 pps->beta_offset = get_se_golomb(gb) * 2;

1377 pps->tc_offset = get_se_golomb(gb) * 2;

1378 if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

1379 av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

1380 pps->beta_offset/2);

1381 ret = AVERROR_INVALIDDATA;

1382 goto err;

1383 }

1384 if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

1385 av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

1386 pps->tc_offset/2);

1387 ret = AVERROR_INVALIDDATA;

1388 goto err;

1389 }

1390 }

1391 }

1392

1393 pps->scaling_list_data_present_flag = get_bits1(gb);

1394 if (pps->scaling_list_data_present_flag) {

1395 set_default_scaling_list_data(&pps->scaling_list);

1396 ret = scaling_list_data(s, &pps->scaling_list, sps);

1397 if (ret < 0)

1398 goto err;

1399 }

1400 pps->lists_modification_present_flag = get_bits1(gb);

1401 pps->log2_parallel_merge_level = get_ue_golomb_long(gb) + 2;

1402 if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

1403 av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

1404 pps->log2_parallel_merge_level - 2);

1405 ret = AVERROR_INVALIDDATA;

1406 goto err;

1407 }

1408

1409 pps->slice_header_extension_present_flag = get_bits1(gb);

1410

1411 if (get_bits1(gb)) { // pps_extension_present_flag

1412 int pps_range_extensions_flag = get_bits1(gb);

1413 /* int pps_extension_7bits = */ get_bits(gb, 7);

1414 if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

1415 if ((ret = pps_range_extensions(s, pps, sps)) < 0)

1416 goto err;

1417 }

1418 }

1419

1420 // Inferred parameters

1421 pps->col_bd = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

1422 pps->row_bd = av_malloc_array(pps->num_tile_rows + 1, sizeof(*pps->row_bd));

1423 pps->col_idxX = av_malloc_array(sps->ctb_width, sizeof(*pps->col_idxX));

1424 if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {

1425 ret = AVERROR(ENOMEM);

1426 goto err;

1427 }

1428

1429 if (pps->uniform_spacing_flag) {

1430 if (!pps->column_width) {

1431 pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

1432 pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height));

1433 }

1434 if (!pps->column_width || !pps->row_height) {

1435 ret = AVERROR(ENOMEM);

1436 goto err;

1437 }

1438

1439 for (i = 0; i < pps->num_tile_columns; i++) {

1440 pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

1441 (i * sps->ctb_width) / pps->num_tile_columns;

1442 }

1443

1444 for (i = 0; i < pps->num_tile_rows; i++) {

1445 pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

1446 (i * sps->ctb_height) / pps->num_tile_rows;

1447 }

1448 }

1449

1450 pps->col_bd[0] = 0;

1451 for (i = 0; i < pps->num_tile_columns; i++)

1452 pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

1453

1454 pps->row_bd[0] = 0;

1455 for (i = 0; i < pps->num_tile_rows; i++)

1456 pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

1457

1458 for (i = 0, j = 0; i < sps->ctb_width; i++) {

1459 if (i > pps->col_bd[j])

1460 j++;

1461 pps->col_idxX[i] = j;

1462 }

1463

1464 /**

1465 * 6.5

1466 */

1467 pic_area_in_ctbs = sps->ctb_width * sps->ctb_height;

1468

1469 pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_rs_to_ts));

1470 pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_ts_to_rs));

1471 pps->tile_id = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->tile_id));

1472 pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

1473 if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

1474 !pps->tile_id || !pps->min_tb_addr_zs_tab) {

1475 ret = AVERROR(ENOMEM);

1476 goto err;

1477 }

1478

1479 for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

1480 int tb_x = ctb_addr_rs % sps->ctb_width;

1481 int tb_y = ctb_addr_rs / sps->ctb_width;

1482 int tile_x = 0;

1483 int tile_y = 0;

1484 int val = 0;

1485

1486 for (i = 0; i < pps->num_tile_columns; i++) {

1487 if (tb_x < pps->col_bd[i + 1]) {

1488 tile_x = i;

1489 break;

1490 }

1491 }

1492

1493 for (i = 0; i < pps->num_tile_rows; i++) {

1494 if (tb_y < pps->row_bd[i + 1]) {

1495 tile_y = i;

1496 break;

1497 }

1498 }

1499

1500 for (i = 0; i < tile_x; i++)

1501 val += pps->row_height[tile_y] * pps->column_width[i];

1502 for (i = 0; i < tile_y; i++)

1503 val += sps->ctb_width * pps->row_height[i];

1504

1505 val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

1506 tb_x - pps->col_bd[tile_x];

1507

1508 pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

1509 pps->ctb_addr_ts_to_rs[val] = ctb_addr_rs;

1510 }

1511

1512 for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

1513 for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

1514 for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

1515 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

1516 pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

1517

1518 pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

1519 if (!pps->tile_pos_rs) {

1520 ret = AVERROR(ENOMEM);

1521 goto err;

1522 }

1523

1524 for (j = 0; j < pps->num_tile_rows; j++)

1525 for (i = 0; i < pps->num_tile_columns; i++)

1526 pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

1527

1528 log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;

1529 pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

1530 for (y = 0; y < sps->tb_mask+2; y++) {

1531 pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

1532 pps->min_tb_addr_zs_tab[y] = -1;

1533 }

1534 for (y = 0; y < sps->tb_mask+1; y++) {

1535 for (x = 0; x < sps->tb_mask+1; x++) {

1536 int tb_x = x >> log2_diff_ctb_min_tb_size;

1537 int tb_y = y >> log2_diff_ctb_min_tb_size;

1538 int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

1539 int val = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

1540 (log2_diff_ctb_min_tb_size * 2);

1541 for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {

1542 int m = 1 << i;

1543 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

1544 }

1545 pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

1546 }

1547 }

1548

1549 if (get_bits_left(gb) < 0) {

1550 av_log(s->avctx, AV_LOG_ERROR,

1551 "Overread PPS by %d bits\n", -get_bits_left(gb));

1552 goto err;

1553 }

1554

1555 av_buffer_unref(&s->pps_list[pps_id]);

1556 s->pps_list[pps_id] = pps_buf;

1557

1558 return 0;

1559

1560 err:

1561 av_buffer_unref(&pps_buf);

1562 return ret;

1563 }

Generated on Sun Mar 8 2015 02:34:53 for FFmpeg by doxygen 1.8.2