FFmpeg: libavcodec/cavs.c Source File

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libavcodec

cavs.c

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1 /*

2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.

4 *

5 * This file is part of FFmpeg.

6 *

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

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

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

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

11 *

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

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

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

15 * Lesser General Public License for more details.

16 *

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

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

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

20 */

22 /**

23 * @file

24 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder

25 * @author Stefan Gehrer <stefan.gehrer@gmx.de>

26 */

28 #include "avcodec.h"

29 #include "get_bits.h"

30 #include "golomb.h"

31 #include "h264chroma.h"

32 #include "idctdsp.h"

33 #include "internal.h"

34 #include "mathops.h"

35 #include "qpeldsp.h"

36 #include "cavs.h"

38 static const uint8_t alpha_tab[64] = {

39 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3,

40 4, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20,

41 22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,

42 46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64

43 };

45 static const uint8_t beta_tab[64] = {

46 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,

47 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6,

48 6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 14,

49 15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27

50 };

52 static const uint8_t tc_tab[64] = {

53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

54 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,

55 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,

56 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9

57 };

59 /** mark block as unavailable, i.e. out of picture

60 * or not yet decoded */

61 static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL };

63 static const int8_t left_modifier_l[8] = { 0, -1, 6, -1, -1, 7, 6, 7 };

64 static const int8_t top_modifier_l[8] = { -1, 1, 5, -1, -1, 5, 7, 7 };

65 static const int8_t left_modifier_c[7] = { 5, -1, 2, -1, 6, 5, 6 };

66 static const int8_t top_modifier_c[7] = { 4, 1, -1, -1, 4, 6, 6 };

68 /*****************************************************************************

69 *

70 * in-loop deblocking filter

71 *

72 ****************************************************************************/

74 static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b)

75 {

76 if ((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))

77 return 2;

78 if((abs(mvP->x - mvQ->x) >= 4) ||

79 (abs(mvP->y - mvQ->y) >= 4) ||

80 (mvP->ref != mvQ->ref))

81 return 1;

82 if (b) {

83 mvP += MV_BWD_OFFS;

84 mvQ += MV_BWD_OFFS;

85 if((abs(mvP->x - mvQ->x) >= 4) ||

86 (abs(mvP->y - mvQ->y) >= 4) ||

87 (mvP->ref != mvQ->ref))

88 return 1;

89 }

90 return 0;

91 }

93 #define SET_PARAMS \

94 alpha = alpha_tab[av_clip_uintp2(qp_avg + h->alpha_offset, 6)]; \

95 beta = beta_tab[av_clip_uintp2(qp_avg + h->beta_offset, 6)]; \

96 tc = tc_tab[av_clip_uintp2(qp_avg + h->alpha_offset, 6)];

98 /**

99 * in-loop deblocking filter for a single macroblock

100 *

101 * boundary strength (bs) mapping:

102 *

103 * --4---5--

104 * 0 2 |

105 * | 6 | 7 |

106 * 1 3 |

107 * ---------

108 *

109 */

110 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)

111 {

112 uint8_t bs[8];

113 int qp_avg, alpha, beta, tc;

114 int i;

115

116 /* save un-deblocked lines */

117 h->topleft_border_y = h->top_border_y[h->mbx * 16 + 15];

118 h->topleft_border_u = h->top_border_u[h->mbx * 10 + 8];

119 h->topleft_border_v = h->top_border_v[h->mbx * 10 + 8];

120 memcpy(&h->top_border_y[h->mbx * 16], h->cy + 15 * h->l_stride, 16);

121 memcpy(&h->top_border_u[h->mbx * 10 + 1], h->cu + 7 * h->c_stride, 8);

122 memcpy(&h->top_border_v[h->mbx * 10 + 1], h->cv + 7 * h->c_stride, 8);

123 for (i = 0; i < 8; i++) {

124 h->left_border_y[i * 2 + 1] = *(h->cy + 15 + (i * 2 + 0) * h->l_stride);

125 h->left_border_y[i * 2 + 2] = *(h->cy + 15 + (i * 2 + 1) * h->l_stride);

126 h->left_border_u[i + 1] = *(h->cu + 7 + i * h->c_stride);

127 h->left_border_v[i + 1] = *(h->cv + 7 + i * h->c_stride);

128 }

129 if (!h->loop_filter_disable) {

130 /* determine bs */

131 if (mb_type == I_8X8)

132 memset(bs, 2, 8);

133 else {

134 memset(bs, 0, 8);

135 if (ff_cavs_partition_flags[mb_type] & SPLITV) {

136 bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);

137 bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);

138 }

139 if (ff_cavs_partition_flags[mb_type] & SPLITH) {

140 bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);

141 bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);

142 }

143 bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);

144 bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);

145 bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);

146 bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);

147 }

148 if (AV_RN64(bs)) {

149 if (h->flags & A_AVAIL) {

150 qp_avg = (h->qp + h->left_qp + 1) >> 1;

151 SET_PARAMS;

152 h->cdsp.cavs_filter_lv(h->cy, h->l_stride, alpha, beta, tc, bs[0], bs[1]);

153 qp_avg = (ff_cavs_chroma_qp[h->qp] + ff_cavs_chroma_qp[h->left_qp] + 1) >> 1;

154 SET_PARAMS;

155 h->cdsp.cavs_filter_cv(h->cu, h->c_stride, alpha, beta, tc, bs[0], bs[1]);

156 h->cdsp.cavs_filter_cv(h->cv, h->c_stride, alpha, beta, tc, bs[0], bs[1]);

157 }

158 qp_avg = h->qp;

159 SET_PARAMS;

160 h->cdsp.cavs_filter_lv(h->cy + 8, h->l_stride, alpha, beta, tc, bs[2], bs[3]);

161 h->cdsp.cavs_filter_lh(h->cy + 8 * h->l_stride, h->l_stride, alpha, beta, tc, bs[6], bs[7]);

162

163 if (h->flags & B_AVAIL) {

164 qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;

165 SET_PARAMS;

166 h->cdsp.cavs_filter_lh(h->cy, h->l_stride, alpha, beta, tc, bs[4], bs[5]);

167 qp_avg = (ff_cavs_chroma_qp[h->qp] + ff_cavs_chroma_qp[h->top_qp[h->mbx]] + 1) >> 1;

168 SET_PARAMS;

169 h->cdsp.cavs_filter_ch(h->cu, h->c_stride, alpha, beta, tc, bs[4], bs[5]);

170 h->cdsp.cavs_filter_ch(h->cv, h->c_stride, alpha, beta, tc, bs[4], bs[5]);

171 }

172 }

173 }

174 h->left_qp = h->qp;

175 h->top_qp[h->mbx] = h->qp;

176 }

177

178 #undef SET_PARAMS

179

180 /*****************************************************************************

181 *

182 * spatial intra prediction

183 *

184 ****************************************************************************/

185

186 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,

187 uint8_t **left, int block)

188 {

189 int i;

190

191 switch (block) {

192 case 0:

193 *left = h->left_border_y;

194 h->left_border_y[0] = h->left_border_y[1];

195 memset(&h->left_border_y[17], h->left_border_y[16], 9);

196 memcpy(&top[1], &h->top_border_y[h->mbx * 16], 16);

197 top[17] = top[16];

198 top[0] = top[1];

199 if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))

200 h->left_border_y[0] = top[0] = h->topleft_border_y;

201 break;

202 case 1:

203 *left = h->intern_border_y;

204 for (i = 0; i < 8; i++)

205 h->intern_border_y[i + 1] = *(h->cy + 7 + i * h->l_stride);

206 memset(&h->intern_border_y[9], h->intern_border_y[8], 9);

207 h->intern_border_y[0] = h->intern_border_y[1];

208 memcpy(&top[1], &h->top_border_y[h->mbx * 16 + 8], 8);

209 if (h->flags & C_AVAIL)

210 memcpy(&top[9], &h->top_border_y[(h->mbx + 1) * 16], 8);

211 else

212 memset(&top[9], top[8], 9);

213 top[17] = top[16];

214 top[0] = top[1];

215 if (h->flags & B_AVAIL)

216 h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];

217 break;

218 case 2:

219 *left = &h->left_border_y[8];

220 memcpy(&top[1], h->cy + 7 * h->l_stride, 16);

221 top[17] = top[16];

222 top[0] = top[1];

223 if (h->flags & A_AVAIL)

224 top[0] = h->left_border_y[8];

225 break;

226 case 3:

227 *left = &h->intern_border_y[8];

228 for (i = 0; i < 8; i++)

229 h->intern_border_y[i + 9] = *(h->cy + 7 + (i + 8) * h->l_stride);

230 memset(&h->intern_border_y[17], h->intern_border_y[16], 9);

231 memcpy(&top[0], h->cy + 7 + 7 * h->l_stride, 9);

232 memset(&top[9], top[8], 9);

233 break;

234 }

235 }

236

237 void ff_cavs_load_intra_pred_chroma(AVSContext *h)

238 {

239 /* extend borders by one pixel */

240 h->left_border_u[9] = h->left_border_u[8];

241 h->left_border_v[9] = h->left_border_v[8];

242 if(h->flags & C_AVAIL) {

243 h->top_border_u[h->mbx*10 + 9] = h->top_border_u[h->mbx*10 + 11];

244 h->top_border_v[h->mbx*10 + 9] = h->top_border_v[h->mbx*10 + 11];

245 } else {

246 h->top_border_u[h->mbx * 10 + 9] = h->top_border_u[h->mbx * 10 + 8];

247 h->top_border_v[h->mbx * 10 + 9] = h->top_border_v[h->mbx * 10 + 8];

248 }

249 if((h->flags & A_AVAIL) && (h->flags & B_AVAIL)) {

250 h->top_border_u[h->mbx * 10] = h->left_border_u[0] = h->topleft_border_u;

251 h->top_border_v[h->mbx * 10] = h->left_border_v[0] = h->topleft_border_v;

252 } else {

253 h->left_border_u[0] = h->left_border_u[1];

254 h->left_border_v[0] = h->left_border_v[1];

255 h->top_border_u[h->mbx * 10] = h->top_border_u[h->mbx * 10 + 1];

256 h->top_border_v[h->mbx * 10] = h->top_border_v[h->mbx * 10 + 1];

257 }

258 }

259

260 static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

261 {

262 int y;

263 uint64_t a = AV_RN64(&top[1]);

264 for (y = 0; y < 8; y++)

265 *((uint64_t *)(d + y * stride)) = a;

266 }

267

268 static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

269 {

270 int y;

271 uint64_t a;

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

273 a = left[y + 1] * 0x0101010101010101ULL;

274 *((uint64_t *)(d + y * stride)) = a;

275 }

276 }

277

278 static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

279 {

280 int y;

281 uint64_t a = 0x8080808080808080ULL;

282 for (y = 0; y < 8; y++)

283 *((uint64_t *)(d + y * stride)) = a;

284 }

285

286 static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

287 {

288 int x, y, ia;

289 int ih = 0;

290 int iv = 0;

291 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;

292

293 for (x = 0; x < 4; x++) {

294 ih += (x + 1) * (top[5 + x] - top[3 - x]);

295 iv += (x + 1) * (left[5 + x] - left[3 - x]);

296 }

297 ia = (top[8] + left[8]) << 4;

298 ih = (17 * ih + 16) >> 5;

299 iv = (17 * iv + 16) >> 5;

300 for (y = 0; y < 8; y++)

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

302 d[y * stride + x] = cm[(ia + (x - 3) * ih + (y - 3) * iv + 16) >> 5];

303 }

304

305 #define LOWPASS(ARRAY, INDEX) \

306 ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)

307

308 static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

309 {

310 int x, y;

311 for (y = 0; y < 8; y++)

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

313 d[y * stride + x] = (LOWPASS(top, x + 1) + LOWPASS(left, y + 1)) >> 1;

314 }

315

316 static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

317 {

318 int x, y;

319 for (y = 0; y < 8; y++)

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

321 d[y * stride + x] = (LOWPASS(top, x + y + 2) + LOWPASS(left, x + y + 2)) >> 1;

322 }

323

324 static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

325 {

326 int x, y;

327 for (y = 0; y < 8; y++)

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

329 if (x == y)

330 d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;

331 else if (x > y)

332 d[y * stride + x] = LOWPASS(top, x - y);

333 else

334 d[y * stride + x] = LOWPASS(left, y - x);

335 }

336

337 static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

338 {

339 int x, y;

340 for (y = 0; y < 8; y++)

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

342 d[y * stride + x] = LOWPASS(left, y + 1);

343 }

344

345 static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

346 {

347 int x, y;

348 for (y = 0; y < 8; y++)

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

350 d[y * stride + x] = LOWPASS(top, x + 1);

351 }

352

353 #undef LOWPASS

354

355 static inline void modify_pred(const int8_t *mod_table, int *mode)

356 {

357 *mode = mod_table[*mode];

358 if (*mode < 0) {

359 av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");

360 *mode = 0;

361 }

362 }

363

364 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)

365 {

366 /* save pred modes before they get modified */

367 h->pred_mode_Y[3] = h->pred_mode_Y[5];

368 h->pred_mode_Y[6] = h->pred_mode_Y[8];

369 h->top_pred_Y[h->mbx * 2 + 0] = h->pred_mode_Y[7];

370 h->top_pred_Y[h->mbx * 2 + 1] = h->pred_mode_Y[8];

371

372 /* modify pred modes according to availability of neighbour samples */

373 if (!(h->flags & A_AVAIL)) {

374 modify_pred(left_modifier_l, &h->pred_mode_Y[4]);

375 modify_pred(left_modifier_l, &h->pred_mode_Y[7]);

376 modify_pred(left_modifier_c, pred_mode_uv);

377 }

378 if (!(h->flags & B_AVAIL)) {

379 modify_pred(top_modifier_l, &h->pred_mode_Y[4]);

380 modify_pred(top_modifier_l, &h->pred_mode_Y[5]);

381 modify_pred(top_modifier_c, pred_mode_uv);

382 }

383 }

384

385 /*****************************************************************************

386 *

387 * motion compensation

388 *

389 ****************************************************************************/

390

391 static inline void mc_dir_part(AVSContext *h, AVFrame *pic, int chroma_height,

392 int delta, int list, uint8_t *dest_y,

393 uint8_t *dest_cb, uint8_t *dest_cr,

394 int src_x_offset, int src_y_offset,

395 qpel_mc_func *qpix_op,

396 h264_chroma_mc_func chroma_op, cavs_vector *mv)

397 {

398 const int mx = mv->x + src_x_offset * 8;

399 const int my = mv->y + src_y_offset * 8;

400 const int luma_xy = (mx & 3) + ((my & 3) << 2);

401 uint8_t *src_y = pic->data[0] + (mx >> 2) + (my >> 2) * h->l_stride;

402 uint8_t *src_cb = pic->data[1] + (mx >> 3) + (my >> 3) * h->c_stride;

403 uint8_t *src_cr = pic->data[2] + (mx >> 3) + (my >> 3) * h->c_stride;

404 int extra_width = 0;

405 int extra_height = extra_width;

406 const int full_mx = mx >> 2;

407 const int full_my = my >> 2;

408 const int pic_width = 16 * h->mb_width;

409 const int pic_height = 16 * h->mb_height;

410 int emu = 0;

411

412 if (!pic->data[0])

413 return;

414 if (mx & 7)

415 extra_width -= 3;

416 if (my & 7)

417 extra_height -= 3;

418

419 if (full_mx < 0 - extra_width ||

420 full_my < 0 - extra_height ||

421 full_mx + 16 /* FIXME */ > pic_width + extra_width ||

422 full_my + 16 /* FIXME */ > pic_height + extra_height) {

423 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,

424 src_y - 2 - 2 * h->l_stride,

425 h->l_stride, h->l_stride,

426 16 + 5, 16 + 5 /* FIXME */,

427 full_mx - 2, full_my - 2,

428 pic_width, pic_height);

429 src_y = h->edge_emu_buffer + 2 + 2 * h->l_stride;

430 emu = 1;

431 }

432

433 // FIXME try variable height perhaps?

434 qpix_op[luma_xy](dest_y, src_y, h->l_stride);

435

436 if (emu) {

437 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,

438 h->c_stride, h->c_stride,

439 9, 9 /* FIXME */,

440 mx >> 3, my >> 3,

441 pic_width >> 1, pic_height >> 1);

442 src_cb = h->edge_emu_buffer;

443 }

444 chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx & 7, my & 7);

445

446 if (emu) {

447 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,

448 h->c_stride, h->c_stride,

449 9, 9 /* FIXME */,

450 mx >> 3, my >> 3,

451 pic_width >> 1, pic_height >> 1);

452 src_cr = h->edge_emu_buffer;

453 }

454 chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx & 7, my & 7);

455 }

456

457 static inline void mc_part_std(AVSContext *h, int chroma_height, int delta,

458 uint8_t *dest_y,

459 uint8_t *dest_cb,

460 uint8_t *dest_cr,

461 int x_offset, int y_offset,

462 qpel_mc_func *qpix_put,

463 h264_chroma_mc_func chroma_put,

464 qpel_mc_func *qpix_avg,

465 h264_chroma_mc_func chroma_avg,

466 cavs_vector *mv)

467 {

468 qpel_mc_func *qpix_op = qpix_put;

469 h264_chroma_mc_func chroma_op = chroma_put;

470

471 dest_y += x_offset * 2 + y_offset * h->l_stride * 2;

472 dest_cb += x_offset + y_offset * h->c_stride;

473 dest_cr += x_offset + y_offset * h->c_stride;

474 x_offset += 8 * h->mbx;

475 y_offset += 8 * h->mby;

476

477 if (mv->ref >= 0) {

478 AVFrame *ref = h->DPB[mv->ref].f;

479 mc_dir_part(h, ref, chroma_height, delta, 0,

480 dest_y, dest_cb, dest_cr, x_offset, y_offset,

481 qpix_op, chroma_op, mv);

482

483 qpix_op = qpix_avg;

484 chroma_op = chroma_avg;

485 }

486

487 if ((mv + MV_BWD_OFFS)->ref >= 0) {

488 AVFrame *ref = h->DPB[0].f;

489 mc_dir_part(h, ref, chroma_height, delta, 1,

490 dest_y, dest_cb, dest_cr, x_offset, y_offset,

491 qpix_op, chroma_op, mv + MV_BWD_OFFS);

492 }

493 }

494

495 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)

496 {

497 if (ff_cavs_partition_flags[mb_type] == 0) { // 16x16

498 mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,

499 h->cdsp.put_cavs_qpel_pixels_tab[0],

500 h->h264chroma.put_h264_chroma_pixels_tab[0],

501 h->cdsp.avg_cavs_qpel_pixels_tab[0],

502 h->h264chroma.avg_h264_chroma_pixels_tab[0],

503 &h->mv[MV_FWD_X0]);

504 } else {

505 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,

506 h->cdsp.put_cavs_qpel_pixels_tab[1],

507 h->h264chroma.put_h264_chroma_pixels_tab[1],

508 h->cdsp.avg_cavs_qpel_pixels_tab[1],

509 h->h264chroma.avg_h264_chroma_pixels_tab[1],

510 &h->mv[MV_FWD_X0]);

511 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,

512 h->cdsp.put_cavs_qpel_pixels_tab[1],

513 h->h264chroma.put_h264_chroma_pixels_tab[1],

514 h->cdsp.avg_cavs_qpel_pixels_tab[1],

515 h->h264chroma.avg_h264_chroma_pixels_tab[1],

516 &h->mv[MV_FWD_X1]);

517 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,

518 h->cdsp.put_cavs_qpel_pixels_tab[1],

519 h->h264chroma.put_h264_chroma_pixels_tab[1],

520 h->cdsp.avg_cavs_qpel_pixels_tab[1],

521 h->h264chroma.avg_h264_chroma_pixels_tab[1],

522 &h->mv[MV_FWD_X2]);

523 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,

524 h->cdsp.put_cavs_qpel_pixels_tab[1],

525 h->h264chroma.put_h264_chroma_pixels_tab[1],

526 h->cdsp.avg_cavs_qpel_pixels_tab[1],

527 h->h264chroma.avg_h264_chroma_pixels_tab[1],

528 &h->mv[MV_FWD_X3]);

529 }

530 }

531

532 /*****************************************************************************

533 *

534 * motion vector prediction

535 *

536 ****************************************************************************/

537

538 static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,

539 cavs_vector *src, int distp)

540 {

541 int den = h->scale_den[FFMAX(src->ref, 0)];

542

543 *d_x = (src->x * distp * den + 256 + FF_SIGNBIT(src->x)) >> 9;

544 *d_y = (src->y * distp * den + 256 + FF_SIGNBIT(src->y)) >> 9;

545 }

546

547 static inline void mv_pred_median(AVSContext *h,

548 cavs_vector *mvP,

549 cavs_vector *mvA,

550 cavs_vector *mvB,

551 cavs_vector *mvC)

552 {

553 int ax, ay, bx, by, cx, cy;

554 int len_ab, len_bc, len_ca, len_mid;

555

556 /* scale candidates according to their temporal span */

557 scale_mv(h, &ax, &ay, mvA, mvP->dist);

558 scale_mv(h, &bx, &by, mvB, mvP->dist);

559 scale_mv(h, &cx, &cy, mvC, mvP->dist);

560 /* find the geometrical median of the three candidates */

561 len_ab = abs(ax - bx) + abs(ay - by);

562 len_bc = abs(bx - cx) + abs(by - cy);

563 len_ca = abs(cx - ax) + abs(cy - ay);

564 len_mid = mid_pred(len_ab, len_bc, len_ca);

565 if (len_mid == len_ab) {

566 mvP->x = cx;

567 mvP->y = cy;

568 } else if (len_mid == len_bc) {

569 mvP->x = ax;

570 mvP->y = ay;

571 } else {

572 mvP->x = bx;

573 mvP->y = by;

574 }

575 }

576

577 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,

578 enum cavs_mv_pred mode, enum cavs_block size, int ref)

579 {

580 cavs_vector *mvP = &h->mv[nP];

581 cavs_vector *mvA = &h->mv[nP-1];

582 cavs_vector *mvB = &h->mv[nP-4];

583 cavs_vector *mvC = &h->mv[nC];

584 const cavs_vector *mvP2 = NULL;

585

586 mvP->ref = ref;

587 mvP->dist = h->dist[mvP->ref];

588 if (mvC->ref == NOT_AVAIL || (nP == MV_FWD_X3) || (nP == MV_BWD_X3 ))

589 mvC = &h->mv[nP - 5]; // set to top-left (mvD)

590 if (mode == MV_PRED_PSKIP &&

591 (mvA->ref == NOT_AVAIL ||

592 mvB->ref == NOT_AVAIL ||

593 (mvA->x | mvA->y | mvA->ref) == 0 ||

594 (mvB->x | mvB->y | mvB->ref) == 0)) {

595 mvP2 = &un_mv;

596 /* if there is only one suitable candidate, take it */

597 } else if (mvA->ref >= 0 && mvB->ref < 0 && mvC->ref < 0) {

598 mvP2 = mvA;

599 } else if (mvA->ref < 0 && mvB->ref >= 0 && mvC->ref < 0) {

600 mvP2 = mvB;

601 } else if (mvA->ref < 0 && mvB->ref < 0 && mvC->ref >= 0) {

602 mvP2 = mvC;

603 } else if (mode == MV_PRED_LEFT && mvA->ref == ref) {

604 mvP2 = mvA;

605 } else if (mode == MV_PRED_TOP && mvB->ref == ref) {

606 mvP2 = mvB;

607 } else if (mode == MV_PRED_TOPRIGHT && mvC->ref == ref) {

608 mvP2 = mvC;

609 }

610 if (mvP2) {

611 mvP->x = mvP2->x;

612 mvP->y = mvP2->y;

613 } else

614 mv_pred_median(h, mvP, mvA, mvB, mvC);

615

616 if (mode < MV_PRED_PSKIP) {

617 mvP->x += get_se_golomb(&h->gb);

618 mvP->y += get_se_golomb(&h->gb);

619 }

620 set_mvs(mvP, size);

621 }

622

623 /*****************************************************************************

624 *

625 * macroblock level

626 *

627 ****************************************************************************/

628

629 /**

630 * initialise predictors for motion vectors and intra prediction

631 */

632 void ff_cavs_init_mb(AVSContext *h)

633 {

634 int i;

635

636 /* copy predictors from top line (MB B and C) into cache */

637 for (i = 0; i < 3; i++) {

638 h->mv[MV_FWD_B2 + i] = h->top_mv[0][h->mbx * 2 + i];

639 h->mv[MV_BWD_B2 + i] = h->top_mv[1][h->mbx * 2 + i];

640 }

641 h->pred_mode_Y[1] = h->top_pred_Y[h->mbx * 2 + 0];

642 h->pred_mode_Y[2] = h->top_pred_Y[h->mbx * 2 + 1];

643 /* clear top predictors if MB B is not available */

644 if (!(h->flags & B_AVAIL)) {

645 h->mv[MV_FWD_B2] = un_mv;

646 h->mv[MV_FWD_B3] = un_mv;

647 h->mv[MV_BWD_B2] = un_mv;

648 h->mv[MV_BWD_B3] = un_mv;

649 h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;

650 h->flags &= ~(C_AVAIL | D_AVAIL);

651 } else if (h->mbx) {

652 h->flags |= D_AVAIL;

653 }

654 if (h->mbx == h->mb_width - 1) // MB C not available

655 h->flags &= ~C_AVAIL;

656 /* clear top-right predictors if MB C is not available */

657 if (!(h->flags & C_AVAIL)) {

658 h->mv[MV_FWD_C2] = un_mv;

659 h->mv[MV_BWD_C2] = un_mv;

660 }

661 /* clear top-left predictors if MB D is not available */

662 if (!(h->flags & D_AVAIL)) {

663 h->mv[MV_FWD_D3] = un_mv;

664 h->mv[MV_BWD_D3] = un_mv;

665 }

666 }

667

668 /**

669 * save predictors for later macroblocks and increase

670 * macroblock address

671 * @return 0 if end of frame is reached, 1 otherwise

672 */

673 int ff_cavs_next_mb(AVSContext *h)

674 {

675 int i;

676

677 h->flags |= A_AVAIL;

678 h->cy += 16;

679 h->cu += 8;

680 h->cv += 8;

681 /* copy mvs as predictors to the left */

682 for (i = 0; i <= 20; i += 4)

683 h->mv[i] = h->mv[i + 2];

684 /* copy bottom mvs from cache to top line */

685 h->top_mv[0][h->mbx * 2 + 0] = h->mv[MV_FWD_X2];

686 h->top_mv[0][h->mbx * 2 + 1] = h->mv[MV_FWD_X3];

687 h->top_mv[1][h->mbx * 2 + 0] = h->mv[MV_BWD_X2];

688 h->top_mv[1][h->mbx * 2 + 1] = h->mv[MV_BWD_X3];

689 /* next MB address */

690 h->mbidx++;

691 h->mbx++;

692 if (h->mbx == h->mb_width) { // New mb line

693 h->flags = B_AVAIL | C_AVAIL;

694 /* clear left pred_modes */

695 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;

696 /* clear left mv predictors */

697 for (i = 0; i <= 20; i += 4)

698 h->mv[i] = un_mv;

699 h->mbx = 0;

700 h->mby++;

701 /* re-calculate sample pointers */

702 h->cy = h->cur.f->data[0] + h->mby * 16 * h->l_stride;

703 h->cu = h->cur.f->data[1] + h->mby * 8 * h->c_stride;

704 h->cv = h->cur.f->data[2] + h->mby * 8 * h->c_stride;

705 if (h->mby == h->mb_height) { // Frame end

706 return 0;

707 }

708 }

709 return 1;

710 }

711

712 /*****************************************************************************

713 *

714 * frame level

715 *

716 ****************************************************************************/

717

718 int ff_cavs_init_pic(AVSContext *h)

719 {

720 int i;

721

722 /* clear some predictors */

723 for (i = 0; i <= 20; i += 4)

724 h->mv[i] = un_mv;

725 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;

726 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);

727 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;

728 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);

729 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;

730 h->cy = h->cur.f->data[0];

731 h->cu = h->cur.f->data[1];

732 h->cv = h->cur.f->data[2];

733 h->l_stride = h->cur.f->linesize[0];

734 h->c_stride = h->cur.f->linesize[1];

735 h->luma_scan[2] = 8 * h->l_stride;

736 h->luma_scan[3] = 8 * h->l_stride + 8;

737 h->mbx = h->mby = h->mbidx = 0;

738 h->flags = 0;

739

740 return 0;

741 }

742

743 /*****************************************************************************

744 *

745 * headers and interface

746 *

747 ****************************************************************************/

748

749 /**

750 * some predictions require data from the top-neighbouring macroblock.

751 * this data has to be stored for one complete row of macroblocks

752 * and this storage space is allocated here

753 */

754 int ff_cavs_init_top_lines(AVSContext *h)

755 {

756 /* alloc top line of predictors */

757 h->top_qp = av_mallocz(h->mb_width);

758 h->top_mv[0] = av_mallocz_array(h->mb_width * 2 + 1, sizeof(cavs_vector));

759 h->top_mv[1] = av_mallocz_array(h->mb_width * 2 + 1, sizeof(cavs_vector));

760 h->top_pred_Y = av_mallocz_array(h->mb_width * 2, sizeof(*h->top_pred_Y));

761 h->top_border_y = av_mallocz_array(h->mb_width + 1, 16);

762 h->top_border_u = av_mallocz_array(h->mb_width, 10);

763 h->top_border_v = av_mallocz_array(h->mb_width, 10);

764

765 /* alloc space for co-located MVs and types */

766 h->col_mv = av_mallocz_array(h->mb_width * h->mb_height,

767 4 * sizeof(cavs_vector));

768 h->col_type_base = av_mallocz(h->mb_width * h->mb_height);

769 h->block = av_mallocz(64 * sizeof(int16_t));

770

771 if (!h->top_qp || !h->top_mv[0] || !h->top_mv[1] || !h->top_pred_Y ||

772 !h->top_border_y || !h->top_border_u || !h->top_border_v ||

773 !h->col_mv || !h->col_type_base || !h->block) {

774 av_freep(&h->top_qp);

775 av_freep(&h->top_mv[0]);

776 av_freep(&h->top_mv[1]);

777 av_freep(&h->top_pred_Y);

778 av_freep(&h->top_border_y);

779 av_freep(&h->top_border_u);

780 av_freep(&h->top_border_v);

781 av_freep(&h->col_mv);

782 av_freep(&h->col_type_base);

783 av_freep(&h->block);

784 return AVERROR(ENOMEM);

785 }

786 return 0;

787 }

788

789 av_cold int ff_cavs_init(AVCodecContext *avctx)

790 {

791 AVSContext *h = avctx->priv_data;

792

793 ff_blockdsp_init(&h->bdsp, avctx);

794 ff_h264chroma_init(&h->h264chroma, 8);

795 ff_idctdsp_init(&h->idsp, avctx);

796 ff_videodsp_init(&h->vdsp, 8);

797 ff_cavsdsp_init(&h->cdsp, avctx);

798 ff_init_scantable_permutation(h->idsp.idct_permutation,

799 h->cdsp.idct_perm);

800 ff_init_scantable(h->idsp.idct_permutation, &h->scantable, ff_zigzag_direct);

801

802 h->avctx = avctx;

803 avctx->pix_fmt = AV_PIX_FMT_YUV420P;

804

805 h->cur.f = av_frame_alloc();

806 h->DPB[0].f = av_frame_alloc();

807 h->DPB[1].f = av_frame_alloc();

808 if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {

809 ff_cavs_end(avctx);

810 return AVERROR(ENOMEM);

811 }

812

813 h->luma_scan[0] = 0;

814 h->luma_scan[1] = 8;

815 h->intra_pred_l[INTRA_L_VERT] = intra_pred_vert;

816 h->intra_pred_l[INTRA_L_HORIZ] = intra_pred_horiz;

817 h->intra_pred_l[INTRA_L_LP] = intra_pred_lp;

818 h->intra_pred_l[INTRA_L_DOWN_LEFT] = intra_pred_down_left;

819 h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;

820 h->intra_pred_l[INTRA_L_LP_LEFT] = intra_pred_lp_left;

821 h->intra_pred_l[INTRA_L_LP_TOP] = intra_pred_lp_top;

822 h->intra_pred_l[INTRA_L_DC_128] = intra_pred_dc_128;

823 h->intra_pred_c[INTRA_C_LP] = intra_pred_lp;

824 h->intra_pred_c[INTRA_C_HORIZ] = intra_pred_horiz;

825 h->intra_pred_c[INTRA_C_VERT] = intra_pred_vert;

826 h->intra_pred_c[INTRA_C_PLANE] = intra_pred_plane;

827 h->intra_pred_c[INTRA_C_LP_LEFT] = intra_pred_lp_left;

828 h->intra_pred_c[INTRA_C_LP_TOP] = intra_pred_lp_top;

829 h->intra_pred_c[INTRA_C_DC_128] = intra_pred_dc_128;

830 h->mv[7] = un_mv;

831 h->mv[19] = un_mv;

832 return 0;

833 }

834

835 av_cold int ff_cavs_end(AVCodecContext *avctx)

836 {

837 AVSContext *h = avctx->priv_data;

838

839 av_frame_free(&h->cur.f);

840 av_frame_free(&h->DPB[0].f);

841 av_frame_free(&h->DPB[1].f);

842

843 av_freep(&h->top_qp);

844 av_freep(&h->top_mv[0]);

845 av_freep(&h->top_mv[1]);

846 av_freep(&h->top_pred_Y);

847 av_freep(&h->top_border_y);

848 av_freep(&h->top_border_u);

849 av_freep(&h->top_border_v);

850 av_freep(&h->col_mv);

851 av_freep(&h->col_type_base);

852 av_freep(&h->block);

853 av_freep(&h->edge_emu_buffer);

854 return 0;

855 }

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