FFmpeg: libavcodec/error_resilience.c Source File

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error_resilience.c

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1 /*

2 * Error resilience / concealment

3 *

5 *

6 * This file is part of FFmpeg.

7 *

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

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

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

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

12 *

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

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

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

16 * Lesser General Public License for more details.

17 *

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

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

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

21 */

23 /**

24 * @file

25 * Error resilience / concealment.

26 */

28 #include <limits.h>

30 #include "avcodec.h"

31 #include "dsputil.h"

32 #include "mpegvideo.h"

33 #include "h264.h"

34 #include "rectangle.h"

35 #include "thread.h"

37 /*

38 * H264 redefines mb_intra so it is not mistakely used (its uninitialized in h264)

39 * but error concealment must support both h264 and h263 thus we must undo this

40 */

41 #undef mb_intra

43 static void decode_mb(MpegEncContext *s, int ref)

44 {

45 s->dest[0] = s->current_picture.f.data[0] + (s->mb_y * 16 * s->linesize) + s->mb_x * 16;

46 s->dest[1] = s->current_picture.f.data[1] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);

47 s->dest[2] = s->current_picture.f.data[2] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);

49 ff_init_block_index(s);

50 ff_update_block_index(s);

51 s->dest[1] += (16 >> s->chroma_x_shift) - 8;

52 s->dest[2] += (16 >> s->chroma_x_shift) - 8;

54 if (CONFIG_H264_DECODER && s->codec_id == AV_CODEC_ID_H264) {

55 H264Context *h = (void*)s;

56 h->mb_xy = s->mb_x + s->mb_y * s->mb_stride;

57 memset(h->non_zero_count_cache, 0, sizeof(h->non_zero_count_cache));

58 av_assert1(ref >= 0);

59 /* FIXME: It is possible albeit uncommon that slice references

60 * differ between slices. We take the easy approach and ignore

61 * it for now. If this turns out to have any relevance in

62 * practice then correct remapping should be added. */

63 if (ref >= h->ref_count[0])

64 ref = 0;

65 if (!h->ref_list[0][ref].f.data[0]) {

66 av_log(s->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");

67 ref = 0;

68 }

69 if ((h->ref_list[0][ref].f.reference&3) != 3) {

70 av_log(s->avctx, AV_LOG_DEBUG, "Reference invalid\n");

71 return;

72 }

73 fill_rectangle(&s->current_picture.f.ref_index[0][4 * h->mb_xy],

74 2, 2, 2, ref, 1);

75 fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);

76 fill_rectangle(h->mv_cache[0][scan8[0]], 4, 4, 8,

77 pack16to32(s->mv[0][0][0], s->mv[0][0][1]), 4);

78 h->mb_mbaff =

79 h->mb_field_decoding_flag = 0;

80 ff_h264_hl_decode_mb(h);

81 } else {

82 assert(ref == 0);

83 ff_MPV_decode_mb(s, s->block);

84 }

85 }

87 /**

88 * @param stride the number of MVs to get to the next row

89 * @param mv_step the number of MVs per row or column in a macroblock

90 */

91 static void set_mv_strides(MpegEncContext *s, int *mv_step, int *stride)

92 {

93 if (s->codec_id == AV_CODEC_ID_H264) {

94 H264Context *h = (void*)s;

95 av_assert0(s->quarter_sample);

96 *mv_step = 4;

97 *stride = h->b_stride;

98 } else {

99 *mv_step = 2;

100 *stride = s->b8_stride;

101 }

102 }

103

104 /**

105 * Replace the current MB with a flat dc-only version.

106 */

107 static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb,

108 uint8_t *dest_cr, int mb_x, int mb_y)

109 {

110 int dc, dcu, dcv, y, i;

111 for (i = 0; i < 4; i++) {

112 dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];

113 if (dc < 0)

114 dc = 0;

115 else if (dc > 2040)

116 dc = 2040;

117 for (y = 0; y < 8; y++) {

118 int x;

119 for (x = 0; x < 8; x++)

120 dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * s->linesize] = dc / 8;

121 }

122 }

123 dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];

124 dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];

125 if (dcu < 0)

126 dcu = 0;

127 else if (dcu > 2040)

128 dcu = 2040;

129 if (dcv < 0)

130 dcv = 0;

131 else if (dcv > 2040)

132 dcv = 2040;

133 for (y = 0; y < 8; y++) {

134 int x;

135 for (x = 0; x < 8; x++) {

136 dest_cb[x + y * s->uvlinesize] = dcu / 8;

137 dest_cr[x + y * s->uvlinesize] = dcv / 8;

138 }

139 }

140 }

141

142 static void filter181(int16_t *data, int width, int height, int stride)

143 {

144 int x, y;

145

146 /* horizontal filter */

147 for (y = 1; y < height - 1; y++) {

148 int prev_dc = data[0 + y * stride];

149

150 for (x = 1; x < width - 1; x++) {

151 int dc;

152 dc = -prev_dc +

153 data[x + y * stride] * 8 -

154 data[x + 1 + y * stride];

155 dc = (dc * 10923 + 32768) >> 16;

156 prev_dc = data[x + y * stride];

157 data[x + y * stride] = dc;

158 }

159 }

160

161 /* vertical filter */

162 for (x = 1; x < width - 1; x++) {

163 int prev_dc = data[x];

164

165 for (y = 1; y < height - 1; y++) {

166 int dc;

167

168 dc = -prev_dc +

169 data[x + y * stride] * 8 -

170 data[x + (y + 1) * stride];

171 dc = (dc * 10923 + 32768) >> 16;

172 prev_dc = data[x + y * stride];

173 data[x + y * stride] = dc;

174 }

175 }

176 }

177

178 /**

179 * guess the dc of blocks which do not have an undamaged dc

180 * @param w width in 8 pixel blocks

181 * @param h height in 8 pixel blocks

182 */

183 static void guess_dc(MpegEncContext *s, int16_t *dc, int w,

184 int h, int stride, int is_luma)

185 {

186 int b_x, b_y;

187 int16_t (*col )[4] = av_malloc(stride*h*sizeof( int16_t)*4);

188 uint32_t (*dist)[4] = av_malloc(stride*h*sizeof(uint32_t)*4);

189

190 if(!col || !dist) {

191 av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");

192 goto fail;

193 }

194

195 for(b_y=0; b_y<h; b_y++){

196 int color= 1024;

197 int distance= -1;

198 for(b_x=0; b_x<w; b_x++){

199 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;

200 int error_j= s->error_status_table[mb_index_j];

201 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);

202 if(intra_j==0 || !(error_j&ER_DC_ERROR)){

203 color= dc[b_x + b_y*stride];

204 distance= b_x;

205 }

206 col [b_x + b_y*stride][1]= color;

207 dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;

208 }

209 color= 1024;

210 distance= -1;

211 for(b_x=w-1; b_x>=0; b_x--){

212 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;

213 int error_j= s->error_status_table[mb_index_j];

214 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);

215 if(intra_j==0 || !(error_j&ER_DC_ERROR)){

216 color= dc[b_x + b_y*stride];

217 distance= b_x;

218 }

219 col [b_x + b_y*stride][0]= color;

220 dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;

221 }

222 }

223 for(b_x=0; b_x<w; b_x++){

224 int color= 1024;

225 int distance= -1;

226 for(b_y=0; b_y<h; b_y++){

227 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;

228 int error_j= s->error_status_table[mb_index_j];

229 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);

230 if(intra_j==0 || !(error_j&ER_DC_ERROR)){

231 color= dc[b_x + b_y*stride];

232 distance= b_y;

233 }

234 col [b_x + b_y*stride][3]= color;

235 dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;

236 }

237 color= 1024;

238 distance= -1;

239 for(b_y=h-1; b_y>=0; b_y--){

240 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;

241 int error_j= s->error_status_table[mb_index_j];

242 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);

243 if(intra_j==0 || !(error_j&ER_DC_ERROR)){

244 color= dc[b_x + b_y*stride];

245 distance= b_y;

246 }

247 col [b_x + b_y*stride][2]= color;

248 dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;

249 }

250 }

251

252 for (b_y = 0; b_y < h; b_y++) {

253 for (b_x = 0; b_x < w; b_x++) {

254 int mb_index, error, j;

255 int64_t guess, weight_sum;

256 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;

257 error = s->error_status_table[mb_index];

258

259 if (IS_INTER(s->current_picture.f.mb_type[mb_index]))

260 continue; // inter

261 if (!(error & ER_DC_ERROR))

262 continue; // dc-ok

263

264 weight_sum = 0;

265 guess = 0;

266 for (j = 0; j < 4; j++) {

267 int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);

268 guess += weight*(int64_t)col[b_x + b_y*stride][j];

269 weight_sum += weight;

270 }

271 guess = (guess + weight_sum / 2) / weight_sum;

272 dc[b_x + b_y * stride] = guess;

273 }

274 }

275

276 fail:

277 av_freep(&col);

278 av_freep(&dist);

279 }

280

281 /**

282 * simple horizontal deblocking filter used for error resilience

283 * @param w width in 8 pixel blocks

284 * @param h height in 8 pixel blocks

285 */

286 static void h_block_filter(MpegEncContext *s, uint8_t *dst, int w,

287 int h, int stride, int is_luma)

288 {

289 int b_x, b_y, mvx_stride, mvy_stride;

290 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;

291 set_mv_strides(s, &mvx_stride, &mvy_stride);

292 mvx_stride >>= is_luma;

293 mvy_stride *= mvx_stride;

294

295 for (b_y = 0; b_y < h; b_y++) {

296 for (b_x = 0; b_x < w - 1; b_x++) {

297 int y;

298 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];

299 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];

300 int left_intra = IS_INTRA(s->current_picture.f.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);

301 int right_intra = IS_INTRA(s->current_picture.f.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);

302 int left_damage = left_status & ER_MB_ERROR;

303 int right_damage = right_status & ER_MB_ERROR;

304 int offset = b_x * 8 + b_y * stride * 8;

305 int16_t *left_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];

306 int16_t *right_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];

307 if (!(left_damage || right_damage))

308 continue; // both undamaged

309 if ((!left_intra) && (!right_intra) &&

310 FFABS(left_mv[0] - right_mv[0]) +

311 FFABS(left_mv[1] + right_mv[1]) < 2)

312 continue;

313

314 for (y = 0; y < 8; y++) {

315 int a, b, c, d;

316

317 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];

318 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];

319 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];

320

321 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);

322 d = FFMAX(d, 0);

323 if (b < 0)

324 d = -d;

325

326 if (d == 0)

327 continue;

328

329 if (!(left_damage && right_damage))

330 d = d * 16 / 9;

331

332 if (left_damage) {

333 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];

334 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];

335 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];

336 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];

337 }

338 if (right_damage) {

339 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];

340 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];

341 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];

342 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];

343 }

344 }

345 }

346 }

347 }

348

349 /**

350 * simple vertical deblocking filter used for error resilience

351 * @param w width in 8 pixel blocks

352 * @param h height in 8 pixel blocks

353 */

354 static void v_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h,

355 int stride, int is_luma)

356 {

357 int b_x, b_y, mvx_stride, mvy_stride;

358 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;

359 set_mv_strides(s, &mvx_stride, &mvy_stride);

360 mvx_stride >>= is_luma;

361 mvy_stride *= mvx_stride;

362

363 for (b_y = 0; b_y < h - 1; b_y++) {

364 for (b_x = 0; b_x < w; b_x++) {

365 int x;

366 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];

367 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];

368 int top_intra = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);

369 int bottom_intra = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);

370 int top_damage = top_status & ER_MB_ERROR;

371 int bottom_damage = bottom_status & ER_MB_ERROR;

372 int offset = b_x * 8 + b_y * stride * 8;

373

374 int16_t *top_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];

375 int16_t *bottom_mv = s->current_picture.f.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];

376

377 if (!(top_damage || bottom_damage))

378 continue; // both undamaged

379

380 if ((!top_intra) && (!bottom_intra) &&

381 FFABS(top_mv[0] - bottom_mv[0]) +

382 FFABS(top_mv[1] + bottom_mv[1]) < 2)

383 continue;

384

385 for (x = 0; x < 8; x++) {

386 int a, b, c, d;

387

388 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];

389 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];

390 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];

391

392 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);

393 d = FFMAX(d, 0);

394 if (b < 0)

395 d = -d;

396

397 if (d == 0)

398 continue;

399

400 if (!(top_damage && bottom_damage))

401 d = d * 16 / 9;

402

403 if (top_damage) {

404 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];

405 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];

406 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];

407 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];

408 }

409 if (bottom_damage) {

410 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];

411 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];

412 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];

413 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];

414 }

415 }

416 }

417 }

418 }

419

420 static void guess_mv(MpegEncContext *s)

421 {

422 uint8_t *fixed = s->er_temp_buffer;

423 #define MV_FROZEN 3

424 #define MV_CHANGED 2

425 #define MV_UNCHANGED 1

426 const int mb_stride = s->mb_stride;

427 const int mb_width = s->mb_width;

428 const int mb_height = s->mb_height;

429 int i, depth, num_avail;

430 int mb_x, mb_y, mot_step, mot_stride;

431

432 set_mv_strides(s, &mot_step, &mot_stride);

433

434 num_avail = 0;

435 for (i = 0; i < s->mb_num; i++) {

436 const int mb_xy = s->mb_index2xy[i];

437 int f = 0;

438 int error = s->error_status_table[mb_xy];

439

440 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))

441 f = MV_FROZEN; // intra // FIXME check

442 if (!(error & ER_MV_ERROR))

443 f = MV_FROZEN; // inter with undamaged MV

444

445 fixed[mb_xy] = f;

446 if (f == MV_FROZEN)

447 num_avail++;

448 else if(s->last_picture.f.data[0] && s->last_picture.f.motion_val[0]){

449 const int mb_y= mb_xy / s->mb_stride;

450 const int mb_x= mb_xy % s->mb_stride;

451 const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;

452 s->current_picture.f.motion_val[0][mot_index][0]= s->last_picture.f.motion_val[0][mot_index][0];

453 s->current_picture.f.motion_val[0][mot_index][1]= s->last_picture.f.motion_val[0][mot_index][1];

454 s->current_picture.f.ref_index[0][4*mb_xy] = s->last_picture.f.ref_index[0][4*mb_xy];

455 }

456 }

457

458 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||

459 num_avail <= mb_width / 2) {

460 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {

461 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {

462 const int mb_xy = mb_x + mb_y * s->mb_stride;

463

464 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))

465 continue;

466 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))

467 continue;

468

469 s->mv_dir = s->last_picture.f.data[0] ? MV_DIR_FORWARD

470 : MV_DIR_BACKWARD;

471 s->mb_intra = 0;

472 s->mv_type = MV_TYPE_16X16;

473 s->mb_skipped = 0;

474

475 s->dsp.clear_blocks(s->block[0]);

476

477 s->mb_x = mb_x;

478 s->mb_y = mb_y;

479 s->mv[0][0][0] = 0;

480 s->mv[0][0][1] = 0;

481 decode_mb(s, 0);

482 }

483 }

484 return;

485 }

486

487 for (depth = 0; ; depth++) {

488 int changed, pass, none_left;

489

490 none_left = 1;

491 changed = 1;

492 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {

493 int mb_x, mb_y;

494 int score_sum = 0;

495

496 changed = 0;

497 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {

498 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {

499 const int mb_xy = mb_x + mb_y * s->mb_stride;

500 int mv_predictor[8][2] = { { 0 } };

501 int ref[8] = { 0 };

502 int pred_count = 0;

503 int j;

504 int best_score = 256 * 256 * 256 * 64;

505 int best_pred = 0;

506 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;

507 int prev_x, prev_y, prev_ref;

508

509 if ((mb_x ^ mb_y ^ pass) & 1)

510 continue;

511

512 if (fixed[mb_xy] == MV_FROZEN)

513 continue;

514 av_assert1(!IS_INTRA(s->current_picture.f.mb_type[mb_xy]));

515 av_assert1(s->last_picture_ptr && s->last_picture_ptr->f.data[0]);

516

517 j = 0;

518 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)

519 j = 1;

520 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)

521 j = 1;

522 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)

523 j = 1;

524 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)

525 j = 1;

526 if (j == 0)

527 continue;

528

529 j = 0;

530 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)

531 j = 1;

532 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)

533 j = 1;

534 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)

535 j = 1;

536 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)

537 j = 1;

538 if (j == 0 && pass > 1)

539 continue;

540

541 none_left = 0;

542

543 if (mb_x > 0 && fixed[mb_xy - 1]) {

544 mv_predictor[pred_count][0] =

545 s->current_picture.f.motion_val[0][mot_index - mot_step][0];

546 mv_predictor[pred_count][1] =

547 s->current_picture.f.motion_val[0][mot_index - mot_step][1];

548 ref[pred_count] =

549 s->current_picture.f.ref_index[0][4 * (mb_xy - 1)];

550 pred_count++;

551 }

552 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {

553 mv_predictor[pred_count][0] =

554 s->current_picture.f.motion_val[0][mot_index + mot_step][0];

555 mv_predictor[pred_count][1] =

556 s->current_picture.f.motion_val[0][mot_index + mot_step][1];

557 ref[pred_count] =

558 s->current_picture.f.ref_index[0][4 * (mb_xy + 1)];

559 pred_count++;

560 }

561 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {

562 mv_predictor[pred_count][0] =

563 s->current_picture.f.motion_val[0][mot_index - mot_stride * mot_step][0];

564 mv_predictor[pred_count][1] =

565 s->current_picture.f.motion_val[0][mot_index - mot_stride * mot_step][1];

566 ref[pred_count] =

567 s->current_picture.f.ref_index[0][4 * (mb_xy - s->mb_stride)];

568 pred_count++;

569 }

570 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {

571 mv_predictor[pred_count][0] =

572 s->current_picture.f.motion_val[0][mot_index + mot_stride * mot_step][0];

573 mv_predictor[pred_count][1] =

574 s->current_picture.f.motion_val[0][mot_index + mot_stride * mot_step][1];

575 ref[pred_count] =

576 s->current_picture.f.ref_index[0][4 * (mb_xy + s->mb_stride)];

577 pred_count++;

578 }

579 if (pred_count == 0)

580 continue;

581

582 if (pred_count > 1) {

583 int sum_x = 0, sum_y = 0, sum_r = 0;

584 int max_x, max_y, min_x, min_y, max_r, min_r;

585

586 for (j = 0; j < pred_count; j++) {

587 sum_x += mv_predictor[j][0];

588 sum_y += mv_predictor[j][1];

589 sum_r += ref[j];

590 if (j && ref[j] != ref[j - 1])

591 goto skip_mean_and_median;

592 }

593

594 /* mean */

595 mv_predictor[pred_count][0] = sum_x / j;

596 mv_predictor[pred_count][1] = sum_y / j;

597 ref[pred_count] = sum_r / j;

598

599 /* median */

600 if (pred_count >= 3) {

601 min_y = min_x = min_r = 99999;

602 max_y = max_x = max_r = -99999;

603 } else {

604 min_x = min_y = max_x = max_y = min_r = max_r = 0;

605 }

606 for (j = 0; j < pred_count; j++) {

607 max_x = FFMAX(max_x, mv_predictor[j][0]);

608 max_y = FFMAX(max_y, mv_predictor[j][1]);

609 max_r = FFMAX(max_r, ref[j]);

610 min_x = FFMIN(min_x, mv_predictor[j][0]);

611 min_y = FFMIN(min_y, mv_predictor[j][1]);

612 min_r = FFMIN(min_r, ref[j]);

613 }

614 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;

615 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;

616 ref[pred_count + 1] = sum_r - max_r - min_r;

617

618 if (pred_count == 4) {

619 mv_predictor[pred_count + 1][0] /= 2;

620 mv_predictor[pred_count + 1][1] /= 2;

621 ref[pred_count + 1] /= 2;

622 }

623 pred_count += 2;

624 }

625

626 skip_mean_and_median:

627 /* zero MV */

628 pred_count++;

629

630 if (!fixed[mb_xy] && 0) {

631 if (s->avctx->codec_id == AV_CODEC_ID_H264) {

632 // FIXME

633 } else {

634 ff_thread_await_progress(&s->last_picture_ptr->f,

635 mb_y, 0);

636 }

637 if (!s->last_picture.f.motion_val[0] ||

638 !s->last_picture.f.ref_index[0])

639 goto skip_last_mv;

640 prev_x = s->last_picture.f.motion_val[0][mot_index][0];

641 prev_y = s->last_picture.f.motion_val[0][mot_index][1];

642 prev_ref = s->last_picture.f.ref_index[0][4 * mb_xy];

643 } else {

644 prev_x = s->current_picture.f.motion_val[0][mot_index][0];

645 prev_y = s->current_picture.f.motion_val[0][mot_index][1];

646 prev_ref = s->current_picture.f.ref_index[0][4 * mb_xy];

647 }

648

649 /* last MV */

650 mv_predictor[pred_count][0] = prev_x;

651 mv_predictor[pred_count][1] = prev_y;

652 ref[pred_count] = prev_ref;

653 pred_count++;

654

655 skip_last_mv:

656 s->mv_dir = MV_DIR_FORWARD;

657 s->mb_intra = 0;

658 s->mv_type = MV_TYPE_16X16;

659 s->mb_skipped = 0;

660

661 s->dsp.clear_blocks(s->block[0]);

662

663 s->mb_x = mb_x;

664 s->mb_y = mb_y;

665

666 for (j = 0; j < pred_count; j++) {

667 int score = 0;

668 uint8_t *src = s->current_picture.f.data[0] +

669 mb_x * 16 + mb_y * 16 * s->linesize;

670

671 s->current_picture.f.motion_val[0][mot_index][0] =

672 s->mv[0][0][0] = mv_predictor[j][0];

673 s->current_picture.f.motion_val[0][mot_index][1] =

674 s->mv[0][0][1] = mv_predictor[j][1];

675

676 // predictor intra or otherwise not available

677 if (ref[j] < 0)

678 continue;

679

680 decode_mb(s, ref[j]);

681

682 if (mb_x > 0 && fixed[mb_xy - 1]) {

683 int k;

684 for (k = 0; k < 16; k++)

685 score += FFABS(src[k * s->linesize - 1] -

686 src[k * s->linesize]);

687 }

688 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {

689 int k;

690 for (k = 0; k < 16; k++)

691 score += FFABS(src[k * s->linesize + 15] -

692 src[k * s->linesize + 16]);

693 }

694 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {

695 int k;

696 for (k = 0; k < 16; k++)

697 score += FFABS(src[k - s->linesize] - src[k]);

698 }

699 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {

700 int k;

701 for (k = 0; k < 16; k++)

702 score += FFABS(src[k + s->linesize * 15] -

703 src[k + s->linesize * 16]);

704 }

705

706 if (score <= best_score) { // <= will favor the last MV

707 best_score = score;

708 best_pred = j;

709 }

710 }

711 score_sum += best_score;

712 s->mv[0][0][0] = mv_predictor[best_pred][0];

713 s->mv[0][0][1] = mv_predictor[best_pred][1];

714

715 for (i = 0; i < mot_step; i++)

716 for (j = 0; j < mot_step; j++) {

717 s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];

718 s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];

719 }

720

721 decode_mb(s, ref[best_pred]);

722

723

724 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {

725 fixed[mb_xy] = MV_CHANGED;

726 changed++;

727 } else

728 fixed[mb_xy] = MV_UNCHANGED;

729 }

730 }

731 }

732

733 if (none_left)

734 return;

735

736 for (i = 0; i < s->mb_num; i++) {

737 int mb_xy = s->mb_index2xy[i];

738 if (fixed[mb_xy])

739 fixed[mb_xy] = MV_FROZEN;

740 }

741 }

742 }

743

744 static int is_intra_more_likely(MpegEncContext *s)

745 {

746 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;

747

748 if (!s->last_picture_ptr || !s->last_picture_ptr->f.data[0])

749 return 1; // no previous frame available -> use spatial prediction

750

751 undamaged_count = 0;

752 for (i = 0; i < s->mb_num; i++) {

753 const int mb_xy = s->mb_index2xy[i];

754 const int error = s->error_status_table[mb_xy];

755 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))

756 undamaged_count++;

757 }

758

759 if (s->codec_id == AV_CODEC_ID_H264) {

760 H264Context *h = (void*) s;

761 if (h->list_count <= 0 || h->ref_count[0] <= 0 ||

762 !h->ref_list[0][0].f.data[0])

763 return 1;

764 }

765

766 if (undamaged_count < 5)

767 return 0; // almost all MBs damaged -> use temporal prediction

768

769 // prevent dsp.sad() check, that requires access to the image

770 if (CONFIG_MPEG_XVMC_DECODER &&

771 s->avctx->xvmc_acceleration &&

772 s->pict_type == AV_PICTURE_TYPE_I)

773 return 1;

774

775 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs

776 is_intra_likely = 0;

777

778 j = 0;

779 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {

780 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {

781 int error;

782 const int mb_xy = mb_x + mb_y * s->mb_stride;

783

784 error = s->error_status_table[mb_xy];

785 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))

786 continue; // skip damaged

787

788 j++;

789 // skip a few to speed things up

790 if ((j % skip_amount) != 0)

791 continue;

792

793 if (s->pict_type == AV_PICTURE_TYPE_I) {

794 uint8_t *mb_ptr = s->current_picture.f.data[0] +

795 mb_x * 16 + mb_y * 16 * s->linesize;

796 uint8_t *last_mb_ptr = s->last_picture.f.data[0] +

797 mb_x * 16 + mb_y * 16 * s->linesize;

798

799 if (s->avctx->codec_id == AV_CODEC_ID_H264) {

800 // FIXME

801 } else {

802 ff_thread_await_progress(&s->last_picture_ptr->f,

803 mb_y, 0);

804 }

805 is_intra_likely += s->dsp.sad[0](NULL, last_mb_ptr, mb_ptr , s->linesize, 16);

806 // FIXME need await_progress() here

807 is_intra_likely -= s->dsp.sad[0](NULL, last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize, 16);

808 } else {

809 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))

810 is_intra_likely++;

811 else

812 is_intra_likely--;

813 }

814 }

815 }

816 // printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);

817 return is_intra_likely > 0;

818 }

819

820 void ff_er_frame_start(MpegEncContext *s)

821 {

822 if (!s->err_recognition)

823 return;

824

825 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,

826 s->mb_stride * s->mb_height * sizeof(uint8_t));

827 s->error_count = 3 * s->mb_num;

828 s->error_occurred = 0;

829 }

830

831 /**

832 * Add a slice.

833 * @param endx x component of the last macroblock, can be -1

834 * for the last of the previous line

835 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is

836 * assumed that no earlier end or error of the same type occurred

837 */

838 void ff_er_add_slice(MpegEncContext *s, int startx, int starty,

839 int endx, int endy, int status)

840 {

841 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);

842 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);

843 const int start_xy = s->mb_index2xy[start_i];

844 const int end_xy = s->mb_index2xy[end_i];

845 int mask = -1;

846

847 if (s->avctx->hwaccel)

848 return;

849

850 if (start_i > end_i || start_xy > end_xy) {

851 av_log(s->avctx, AV_LOG_ERROR,

852 "internal error, slice end before start\n");

853 return;

854 }

855

856 if (!s->err_recognition)

857 return;

858

859 mask &= ~VP_START;

860 if (status & (ER_AC_ERROR | ER_AC_END)) {

861 mask &= ~(ER_AC_ERROR | ER_AC_END);

862 s->error_count -= end_i - start_i + 1;

863 }

864 if (status & (ER_DC_ERROR | ER_DC_END)) {

865 mask &= ~(ER_DC_ERROR | ER_DC_END);

866 s->error_count -= end_i - start_i + 1;

867 }

868 if (status & (ER_MV_ERROR | ER_MV_END)) {

869 mask &= ~(ER_MV_ERROR | ER_MV_END);

870 s->error_count -= end_i - start_i + 1;

871 }

872

873 if (status & ER_MB_ERROR) {

874 s->error_occurred = 1;

875 s->error_count = INT_MAX;

876 }

877

878 if (mask == ~0x7F) {

879 memset(&s->error_status_table[start_xy], 0,

880 (end_xy - start_xy) * sizeof(uint8_t));

881 } else {

882 int i;

883 for (i = start_xy; i < end_xy; i++)

884 s->error_status_table[i] &= mask;

885 }

886

887 if (end_i == s->mb_num)

888 s->error_count = INT_MAX;

889 else {

890 s->error_status_table[end_xy] &= mask;

891 s->error_status_table[end_xy] |= status;

892 }

893

894 s->error_status_table[start_xy] |= VP_START;

895

896 if (start_xy > 0 && s->avctx->thread_count <= 1 &&

897 s->avctx->skip_top * s->mb_width < start_i) {

898 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];

899

900 prev_status &= ~ VP_START;

901 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))

902 s->error_count = INT_MAX;

903 }

904 }

905

906 void ff_er_frame_end(MpegEncContext *s)

907 {

908 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;

909 int distance;

910 int threshold_part[4] = { 100, 100, 100 };

911 int threshold = 50;

912 int is_intra_likely;

913 int size = s->b8_stride * 2 * s->mb_height;

914 Picture *pic = s->current_picture_ptr;

915

916 /* We do not support ER of field pictures yet,

917 * though it should not crash if enabled. */

918 if (!s->err_recognition || s->error_count == 0 || s->avctx->lowres ||

919 s->avctx->hwaccel ||

920 s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||

921 s->picture_structure != PICT_FRAME ||

922 s->error_count == 3 * s->mb_width *

923 (s->avctx->skip_top + s->avctx->skip_bottom)) {

924 return;

925 };

926

927 if ( s->picture_structure == PICT_FRAME

928 && s->current_picture.f.linesize[0] != s->current_picture_ptr->f.linesize[0]) {

929 av_log(s->avctx, AV_LOG_ERROR, "Error concealment not possible, frame not fully initialized\n");

930 return;

931 }

932

933 if (s->current_picture.f.motion_val[0] == NULL) {

934 av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");

935

936 for (i = 0; i < 2; i++) {

937 pic->f.ref_index[i] = av_mallocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));

938 pic->motion_val_base[i] = av_mallocz((size + 4) * 2 * sizeof(uint16_t));

939 pic->f.motion_val[i] = pic->motion_val_base[i] + 4;

940 }

941 pic->f.motion_subsample_log2 = 3;

942 s->current_picture = *s->current_picture_ptr;

943 }

944

945 if (s->avctx->debug & FF_DEBUG_ER) {

946 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {

947 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {

948 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];

949

950 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);

951 }

952 av_log(s->avctx, AV_LOG_DEBUG, "\n");

953 }

954 }

955

956 #if 1

957 /* handle overlapping slices */

958 for (error_type = 1; error_type <= 3; error_type++) {

959 int end_ok = 0;

960

961 for (i = s->mb_num - 1; i >= 0; i--) {

962 const int mb_xy = s->mb_index2xy[i];

963 int error = s->error_status_table[mb_xy];

964

965 if (error & (1 << error_type))

966 end_ok = 1;

967 if (error & (8 << error_type))

968 end_ok = 1;

969

970 if (!end_ok)

971 s->error_status_table[mb_xy] |= 1 << error_type;

972

973 if (error & VP_START)

974 end_ok = 0;

975 }

976 }

977 #endif

978 #if 1

979 /* handle slices with partitions of different length */

980 if (s->partitioned_frame) {

981 int end_ok = 0;

982

983 for (i = s->mb_num - 1; i >= 0; i--) {

984 const int mb_xy = s->mb_index2xy[i];

985 int error = s->error_status_table[mb_xy];

986

987 if (error & ER_AC_END)

988 end_ok = 0;

989 if ((error & ER_MV_END) ||

990 (error & ER_DC_END) ||

991 (error & ER_AC_ERROR))

992 end_ok = 1;

993

994 if (!end_ok)

995 s->error_status_table[mb_xy]|= ER_AC_ERROR;

996

997 if (error & VP_START)

998 end_ok = 0;

999 }

1000 }

1001 #endif

1002 /* handle missing slices */

1003 if (s->err_recognition & AV_EF_EXPLODE) {

1004 int end_ok = 1;

1005

1006 // FIXME + 100 hack

1007 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {

1008 const int mb_xy = s->mb_index2xy[i];

1009 int error1 = s->error_status_table[mb_xy];

1010 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];

1011

1012 if (error1 & VP_START)

1013 end_ok = 1;

1014

1015 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&

1016 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&

1017 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||

1018 (error1 & ER_MV_END))) {

1019 // end & uninit

1020 end_ok = 0;

1021 }

1022

1023 if (!end_ok)

1024 s->error_status_table[mb_xy] |= ER_MB_ERROR;

1025 }

1026 }

1027

1028 #if 1

1029 /* backward mark errors */

1030 distance = 9999999;

1031 for (error_type = 1; error_type <= 3; error_type++) {

1032 for (i = s->mb_num - 1; i >= 0; i--) {

1033 const int mb_xy = s->mb_index2xy[i];

1034 int error = s->error_status_table[mb_xy];

1035

1036 if (!s->mbskip_table[mb_xy]) // FIXME partition specific

1037 distance++;

1038 if (error & (1 << error_type))

1039 distance = 0;

1040

1041 if (s->partitioned_frame) {

1042 if (distance < threshold_part[error_type - 1])

1043 s->error_status_table[mb_xy] |= 1 << error_type;

1044 } else {

1045 if (distance < threshold)

1046 s->error_status_table[mb_xy] |= 1 << error_type;

1047 }

1048

1049 if (error & VP_START)

1050 distance = 9999999;

1051 }

1052 }

1053 #endif

1054

1055 /* forward mark errors */

1056 error = 0;

1057 for (i = 0; i < s->mb_num; i++) {

1058 const int mb_xy = s->mb_index2xy[i];

1059 int old_error = s->error_status_table[mb_xy];

1060

1061 if (old_error & VP_START) {

1062 error = old_error & ER_MB_ERROR;

1063 } else {

1064 error |= old_error & ER_MB_ERROR;

1065 s->error_status_table[mb_xy] |= error;

1066 }

1067 }

1068 #if 1

1069 /* handle not partitioned case */

1070 if (!s->partitioned_frame) {

1071 for (i = 0; i < s->mb_num; i++) {

1072 const int mb_xy = s->mb_index2xy[i];

1073 error = s->error_status_table[mb_xy];

1074 if (error & ER_MB_ERROR)

1075 error |= ER_MB_ERROR;

1076 s->error_status_table[mb_xy] = error;

1077 }

1078 }

1079 #endif

1080

1081 dc_error = ac_error = mv_error = 0;

1082 for (i = 0; i < s->mb_num; i++) {

1083 const int mb_xy = s->mb_index2xy[i];

1084 error = s->error_status_table[mb_xy];

1085 if (error & ER_DC_ERROR)

1086 dc_error++;

1087 if (error & ER_AC_ERROR)

1088 ac_error++;

1089 if (error & ER_MV_ERROR)

1090 mv_error++;

1091 }

1092 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",

1093 dc_error, ac_error, mv_error, av_get_picture_type_char(s->pict_type));

1094

1095 is_intra_likely = is_intra_more_likely(s);

1096

1097 /* set unknown mb-type to most likely */

1098 for (i = 0; i < s->mb_num; i++) {

1099 const int mb_xy = s->mb_index2xy[i];

1100 error = s->error_status_table[mb_xy];

1101 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))

1102 continue;

1103

1104 if (is_intra_likely)

1105 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;

1106 else

1107 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;

1108 }

1109

1110 // change inter to intra blocks if no reference frames are available

1111 if (!s->last_picture.f.data[0] && !s->next_picture.f.data[0])

1112 for (i = 0; i < s->mb_num; i++) {

1113 const int mb_xy = s->mb_index2xy[i];

1114 if (!IS_INTRA(s->current_picture.f.mb_type[mb_xy]))

1115 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;

1116 }

1117

1118 /* handle inter blocks with damaged AC */

1119 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {

1120 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {

1121 const int mb_xy = mb_x + mb_y * s->mb_stride;

1122 const int mb_type = s->current_picture.f.mb_type[mb_xy];

1123 int dir = !s->last_picture.f.data[0];

1124

1125 error = s->error_status_table[mb_xy];

1126

1127 if (IS_INTRA(mb_type))

1128 continue; // intra

1129 if (error & ER_MV_ERROR)

1130 continue; // inter with damaged MV

1131 if (!(error & ER_AC_ERROR))

1132 continue; // undamaged inter

1133

1134 s->mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;

1135 s->mb_intra = 0;

1136 s->mb_skipped = 0;

1137 if (IS_8X8(mb_type)) {

1138 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;

1139 int j;

1140 s->mv_type = MV_TYPE_8X8;

1141 for (j = 0; j < 4; j++) {

1142 s->mv[0][j][0] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];

1143 s->mv[0][j][1] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];

1144 }

1145 } else {

1146 s->mv_type = MV_TYPE_16X16;

1147 s->mv[0][0][0] = s->current_picture.f.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];

1148 s->mv[0][0][1] = s->current_picture.f.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];

1149 }

1150

1151 s->dsp.clear_blocks(s->block[0]);

1152

1153 s->mb_x = mb_x;

1154 s->mb_y = mb_y;

1155 decode_mb(s, 0 /* FIXME h264 partitioned slices need this set */);

1156 }

1157 }

1158

1159 /* guess MVs */

1160 if (s->pict_type == AV_PICTURE_TYPE_B) {

1161 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {

1162 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {

1163 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;

1164 const int mb_xy = mb_x + mb_y * s->mb_stride;

1165 const int mb_type = s->current_picture.f.mb_type[mb_xy];

1166

1167 error = s->error_status_table[mb_xy];

1168

1169 if (IS_INTRA(mb_type))

1170 continue;

1171 if (!(error & ER_MV_ERROR))

1172 continue; // inter with undamaged MV

1173 if (!(error & ER_AC_ERROR))

1174 continue; // undamaged inter

1175

1176 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;

1177 if (!s->last_picture.f.data[0])

1178 s->mv_dir &= ~MV_DIR_FORWARD;

1179 if (!s->next_picture.f.data[0])

1180 s->mv_dir &= ~MV_DIR_BACKWARD;

1181 s->mb_intra = 0;

1182 s->mv_type = MV_TYPE_16X16;

1183 s->mb_skipped = 0;

1184

1185 if (s->pp_time) {

1186 int time_pp = s->pp_time;

1187 int time_pb = s->pb_time;

1188

1189 if (s->avctx->codec_id == AV_CODEC_ID_H264) {

1190 // FIXME

1191 } else {

1192 ff_thread_await_progress(&s->next_picture_ptr->f, mb_y, 0);

1193 }

1194 s->mv[0][0][0] = s->next_picture.f.motion_val[0][xy][0] * time_pb / time_pp;

1195 s->mv[0][0][1] = s->next_picture.f.motion_val[0][xy][1] * time_pb / time_pp;

1196 s->mv[1][0][0] = s->next_picture.f.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;

1197 s->mv[1][0][1] = s->next_picture.f.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;

1198 } else {

1199 s->mv[0][0][0] = 0;

1200 s->mv[0][0][1] = 0;

1201 s->mv[1][0][0] = 0;

1202 s->mv[1][0][1] = 0;

1203 }

1204

1205 s->dsp.clear_blocks(s->block[0]);

1206 s->mb_x = mb_x;

1207 s->mb_y = mb_y;

1208 decode_mb(s, 0);

1209 }

1210 }

1211 } else

1212 guess_mv(s);

1213

1214 /* the filters below are not XvMC compatible, skip them */

1215 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)

1216 goto ec_clean;

1217 /* fill DC for inter blocks */

1218 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {

1219 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {

1220 int dc, dcu, dcv, y, n;

1221 int16_t *dc_ptr;

1222 uint8_t *dest_y, *dest_cb, *dest_cr;

1223 const int mb_xy = mb_x + mb_y * s->mb_stride;

1224 const int mb_type = s->current_picture.f.mb_type[mb_xy];

1225

1226 error = s->error_status_table[mb_xy];

1227

1228 if (IS_INTRA(mb_type) && s->partitioned_frame)

1229 continue;

1230 // if (error & ER_MV_ERROR)

1231 // continue; // inter data damaged FIXME is this good?

1232

1233 dest_y = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;

1234 dest_cb = s->current_picture.f.data[1] + mb_x * 8 + mb_y * 8 * s->uvlinesize;

1235 dest_cr = s->current_picture.f.data[2] + mb_x * 8 + mb_y * 8 * s->uvlinesize;

1236

1237 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];

1238 for (n = 0; n < 4; n++) {

1239 dc = 0;

1240 for (y = 0; y < 8; y++) {

1241 int x;

1242 for (x = 0; x < 8; x++)

1243 dc += dest_y[x + (n & 1) * 8 +

1244 (y + (n >> 1) * 8) * s->linesize];

1245 }

1246 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;

1247 }

1248

1249 dcu = dcv = 0;

1250 for (y = 0; y < 8; y++) {

1251 int x;

1252 for (x = 0; x < 8; x++) {

1253 dcu += dest_cb[x + y * s->uvlinesize];

1254 dcv += dest_cr[x + y * s->uvlinesize];

1255 }

1256 }

1257 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;

1258 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;

1259 }

1260 }

1261 #if 1

1262 /* guess DC for damaged blocks */

1263 guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);

1264 guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);

1265 guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);

1266 #endif

1267

1268 /* filter luma DC */

1269 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);

1270

1271 #if 1

1272 /* render DC only intra */

1273 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {

1274 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {

1275 uint8_t *dest_y, *dest_cb, *dest_cr;

1276 const int mb_xy = mb_x + mb_y * s->mb_stride;

1277 const int mb_type = s->current_picture.f.mb_type[mb_xy];

1278

1279 error = s->error_status_table[mb_xy];

1280

1281 if (IS_INTER(mb_type))

1282 continue;

1283 if (!(error & ER_AC_ERROR))

1284 continue; // undamaged

1285

1286 dest_y = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;

1287 dest_cb = s->current_picture.f.data[1] + mb_x * 8 + mb_y * 8 * s->uvlinesize;

1288 dest_cr = s->current_picture.f.data[2] + mb_x * 8 + mb_y * 8 * s->uvlinesize;

1289

1290 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);

1291 }

1292 }

1293 #endif

1294

1295 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {

1296 /* filter horizontal block boundaries */

1297 h_block_filter(s, s->current_picture.f.data[0], s->mb_width * 2,

1298 s->mb_height * 2, s->linesize, 1);

1299 h_block_filter(s, s->current_picture.f.data[1], s->mb_width,

1300 s->mb_height , s->uvlinesize, 0);

1301 h_block_filter(s, s->current_picture.f.data[2], s->mb_width,

1302 s->mb_height , s->uvlinesize, 0);

1303

1304 /* filter vertical block boundaries */

1305 v_block_filter(s, s->current_picture.f.data[0], s->mb_width * 2,

1306 s->mb_height * 2, s->linesize, 1);

1307 v_block_filter(s, s->current_picture.f.data[1], s->mb_width,

1308 s->mb_height , s->uvlinesize, 0);

1309 v_block_filter(s, s->current_picture.f.data[2], s->mb_width,

1310 s->mb_height , s->uvlinesize, 0);

1311 }

1312

1313 ec_clean:

1314 /* clean a few tables */

1315 for (i = 0; i < s->mb_num; i++) {

1316 const int mb_xy = s->mb_index2xy[i];

1317 int error = s->error_status_table[mb_xy];

1318

1319 if (s->pict_type != AV_PICTURE_TYPE_B &&

1320 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {

1321 s->mbskip_table[mb_xy] = 0;

1322 }

1323 s->mbintra_table[mb_xy] = 1;

1324 }

1325 }

Generated on Sat May 25 2013 03:58:33 for FFmpeg by doxygen 1.8.2