1 /******************************************************************************
2 *
3 * Copyright (C) 2015 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20 #include <stdio.h>
21 #include <string.h>
22
23 #include "iv_datatypedef.h"
24 #include "iv.h"
25
26 #include "impeg2_buf_mgr.h"
27 #include "impeg2_disp_mgr.h"
28 #include "impeg2_defs.h"
29 #include "impeg2_platform_macros.h"
30 #include "impeg2_inter_pred.h"
31 #include "impeg2_idct.h"
32 #include "impeg2_globals.h"
33 #include "impeg2_mem_func.h"
34 #include "impeg2_format_conv.h"
35 #include "impeg2_macros.h"
36
37 #include "ivd.h"
38 #include "impeg2d.h"
39 #include "impeg2d_bitstream.h"
40 #include "impeg2d_structs.h"
41 #include "impeg2d_vld_tables.h"
42 #include "impeg2d_vld.h"
43 #include "impeg2d_pic_proc.h"
44 #include "impeg2d_debug.h"
45 #include "impeg2d_mc.h"
46
47 #define BLK_SIZE 8
48 #define LUMA_BLK_SIZE (2 * (BLK_SIZE))
49 #define CHROMA_BLK_SIZE (BLK_SIZE)
50
51
52 /*******************************************************************************
53 *
54 * Function Name : impeg2d_dec_p_mb_params
55 *
56 * Description : Decodes the parameters for P
57 *
58 * Arguments :
59 * dec : Decoder context
60 *
61 * Values Returned : None
62 *******************************************************************************/
impeg2d_dec_p_mb_params(dec_state_t * ps_dec)63 void impeg2d_dec_p_mb_params(dec_state_t *ps_dec)
64 {
65 stream_t *ps_stream = &ps_dec->s_bit_stream;
66 UWORD16 u2_mb_addr_incr;
67 UWORD16 u2_total_len;
68 UWORD16 u2_len;
69 UWORD16 u2_mb_type;
70 UWORD32 u4_next_word;
71 const dec_mb_params_t *ps_dec_mb_params;
72 if(impeg2d_bit_stream_nxt(ps_stream,1) == 1)
73 {
74 impeg2d_bit_stream_flush(ps_stream,1);
75
76 }
77 else
78 {
79 u2_mb_addr_incr = impeg2d_get_mb_addr_incr(ps_stream);
80 if(0 == ps_dec->u2_first_mb)
81 {
82 /****************************************************************/
83 /* If the 2nd member of a field picture pair is a P picture and */
84 /* the first one was an I picture, there cannot be any skipped */
85 /* MBs in the second field picture */
86 /****************************************************************/
87 /*
88 if((dec->picture_structure != FRAME_PICTURE) &&
89 (dec->f->FieldFuncCall != 0) &&
90 (dec->las->u1_last_coded_vop_type == I))
91 {
92 core0_err_handler((void *)(VOLParams),
93 ITTMPEG2_ERR_INVALID_MB_SKIP);
94 }
95 */
96 /****************************************************************/
97 /* In MPEG-2, the last MB of the row cannot be skipped and the */
98 /* MBAddrIncr cannot be such that it will take the current MB */
99 /* beyond the current row */
100 /* In MPEG-1, the slice could start and end anywhere and is not */
101 /* restricted to a row like in MPEG-2. Hence this check should */
102 /* not be done for MPEG-1 streams. */
103 /****************************************************************/
104 if(ps_dec->u2_is_mpeg2 && ((ps_dec->u2_mb_x + u2_mb_addr_incr) > ps_dec->u2_num_horiz_mb) )
105 {
106 u2_mb_addr_incr = ps_dec->u2_num_horiz_mb - ps_dec->u2_mb_x;
107 }
108
109 impeg2d_dec_skip_mbs(ps_dec, (UWORD16)(u2_mb_addr_incr - 1));
110 }
111
112 }
113 u4_next_word = (UWORD16)impeg2d_bit_stream_nxt(ps_stream,16);
114 /*-----------------------------------------------------------------------*/
115 /* MB type */
116 /*-----------------------------------------------------------------------*/
117 {
118 u2_mb_type = ps_dec->pu2_mb_type[BITS((UWORD16)u4_next_word,15,10)];
119 u2_len = BITS(u2_mb_type,15,8);
120 u2_total_len = u2_len;
121 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << u2_len);
122 }
123 /*-----------------------------------------------------------------------*/
124 /* motion type */
125 /*-----------------------------------------------------------------------*/
126 {
127 if((u2_mb_type & MB_FORW_OR_BACK) && ps_dec->u2_read_motion_type)
128 {
129 WORD32 i4_motion_type;
130 ps_dec->u2_motion_type = BITS((UWORD16)u4_next_word,15,14);
131 u2_total_len += MB_MOTION_TYPE_LEN;
132 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_MOTION_TYPE_LEN);
133 i4_motion_type = ps_dec->u2_motion_type;
134
135 if((i4_motion_type == 0) ||
136 (i4_motion_type == 4) ||
137 (i4_motion_type > 7))
138 {
139 //TODO : VANG Check for validity
140 i4_motion_type = 1;
141 }
142
143 }
144 }
145 /*-----------------------------------------------------------------------*/
146 /* dct type */
147 /*-----------------------------------------------------------------------*/
148 {
149 if((u2_mb_type & MB_CODED) && ps_dec->u2_read_dct_type)
150 {
151 ps_dec->u2_field_dct = BIT((UWORD16)u4_next_word,15);
152 u2_total_len += MB_DCT_TYPE_LEN;
153 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_DCT_TYPE_LEN);
154 }
155 }
156 /*-----------------------------------------------------------------------*/
157 /* Quant scale code */
158 /*-----------------------------------------------------------------------*/
159 if(u2_mb_type & MB_QUANT)
160 {
161 UWORD16 u2_quant_scale_code;
162 u2_quant_scale_code = BITS((UWORD16)u4_next_word,15,11);
163
164 ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
165 gau1_impeg2_non_linear_quant_scale[u2_quant_scale_code] : (u2_quant_scale_code << 1);
166 u2_total_len += MB_QUANT_SCALE_CODE_LEN;
167 }
168 impeg2d_bit_stream_flush(ps_stream,u2_total_len);
169 /*-----------------------------------------------------------------------*/
170 /* Set the function pointers */
171 /*-----------------------------------------------------------------------*/
172 ps_dec->u2_coded_mb = (UWORD16)(u2_mb_type & MB_CODED);
173
174 if(u2_mb_type & MB_FORW_OR_BACK)
175 {
176
177 UWORD16 refPic = !(u2_mb_type & MB_MV_FORW);
178 UWORD16 index = (ps_dec->u2_motion_type);
179 ps_dec->u2_prev_intra_mb = 0;
180 ps_dec->e_mb_pred = (e_pred_direction_t)refPic;
181 ps_dec_mb_params = &ps_dec->ps_func_forw_or_back[index];
182 ps_dec->s_mb_type = ps_dec_mb_params->s_mb_type;
183 ps_dec_mb_params->pf_func_mb_params(ps_dec);
184
185 }
186 else if(u2_mb_type & MB_TYPE_INTRA)
187 {
188 ps_dec->u2_prev_intra_mb = 1;
189 impeg2d_dec_intra_mb(ps_dec);
190
191 }
192 else
193 {
194 ps_dec->u2_prev_intra_mb = 0;
195 ps_dec->e_mb_pred = FORW;
196 ps_dec->u2_motion_type = 0;
197 impeg2d_dec_0mv_coded_mb(ps_dec);
198 }
199
200 /*-----------------------------------------------------------------------*/
201 /* decode cbp */
202 /*-----------------------------------------------------------------------*/
203 if((u2_mb_type & MB_TYPE_INTRA))
204 {
205 ps_dec->u2_cbp = 0x3f;
206 ps_dec->u2_prev_intra_mb = 1;
207 }
208 else
209 {
210 ps_dec->u2_prev_intra_mb = 0;
211 ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision;
212 ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
213 ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
214 if((ps_dec->u2_coded_mb))
215 {
216 UWORD16 cbpValue;
217 cbpValue = gau2_impeg2d_cbp_code[impeg2d_bit_stream_nxt(ps_stream,MB_CBP_LEN)];
218 ps_dec->u2_cbp = cbpValue & 0xFF;
219 impeg2d_bit_stream_flush(ps_stream,(cbpValue >> 8) & 0x0FF);
220 }
221 else
222 {
223 ps_dec->u2_cbp = 0;
224 }
225 }
226 }
227
228
229 /*******************************************************************************
230 *
231 * Function Name : impeg2d_dec_pnb_mb_params
232 *
233 * Description : Decodes the parameters for P and B pictures
234 *
235 * Arguments :
236 * dec : Decoder context
237 *
238 * Values Returned : None
239 *******************************************************************************/
impeg2d_dec_pnb_mb_params(dec_state_t * ps_dec)240 void impeg2d_dec_pnb_mb_params(dec_state_t *ps_dec)
241 {
242 stream_t *ps_stream = &ps_dec->s_bit_stream;
243 UWORD16 u2_mb_addr_incr;
244 UWORD16 u2_total_len;
245 UWORD16 u2_len;
246 UWORD16 u2_mb_type;
247 UWORD32 u4_next_word;
248 const dec_mb_params_t *ps_dec_mb_params;
249 if(impeg2d_bit_stream_nxt(ps_stream,1) == 1)
250 {
251 impeg2d_bit_stream_flush(ps_stream,1);
252
253 }
254 else
255 {
256 u2_mb_addr_incr = impeg2d_get_mb_addr_incr(ps_stream);
257
258 if(ps_dec->u2_first_mb)
259 {
260 /****************************************************************/
261 /* Section 6.3.17 */
262 /* The first MB of a slice cannot be skipped */
263 /* But the mb_addr_incr can be > 1, because at the beginning of */
264 /* a slice, it indicates the offset from the last MB in the */
265 /* previous row. Hence for the first slice in a row, the */
266 /* mb_addr_incr needs to be 1. */
267 /****************************************************************/
268 /* MB_x is set to zero whenever MB_y changes. */
269 ps_dec->u2_mb_x = u2_mb_addr_incr - 1;
270 /* For error resilience */
271 ps_dec->u2_mb_x = MIN(ps_dec->u2_mb_x, (ps_dec->u2_num_horiz_mb - 1));
272
273 /****************************************************************/
274 /* mb_addr_incr is forced to 1 because in this decoder it is used */
275 /* more as an indicator of the number of MBs skipped than the */
276 /* as defined by the standard (Section 6.3.17) */
277 /****************************************************************/
278 u2_mb_addr_incr = 1;
279 ps_dec->u2_first_mb = 0;
280 }
281 else
282 {
283 /****************************************************************/
284 /* In MPEG-2, the last MB of the row cannot be skipped and the */
285 /* mb_addr_incr cannot be such that it will take the current MB */
286 /* beyond the current row */
287 /* In MPEG-1, the slice could start and end anywhere and is not */
288 /* restricted to a row like in MPEG-2. Hence this check should */
289 /* not be done for MPEG-1 streams. */
290 /****************************************************************/
291 if(ps_dec->u2_is_mpeg2 &&
292 ((ps_dec->u2_mb_x + u2_mb_addr_incr) > ps_dec->u2_num_horiz_mb))
293 {
294 u2_mb_addr_incr = ps_dec->u2_num_horiz_mb - ps_dec->u2_mb_x;
295 }
296
297
298 impeg2d_dec_skip_mbs(ps_dec, (UWORD16)(u2_mb_addr_incr - 1));
299 }
300
301 }
302 u4_next_word = (UWORD16)impeg2d_bit_stream_nxt(ps_stream,16);
303 /*-----------------------------------------------------------------------*/
304 /* MB type */
305 /*-----------------------------------------------------------------------*/
306 {
307 u2_mb_type = ps_dec->pu2_mb_type[BITS((UWORD16)u4_next_word,15,10)];
308 u2_len = BITS(u2_mb_type,15,8);
309 u2_total_len = u2_len;
310 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << u2_len);
311 }
312 /*-----------------------------------------------------------------------*/
313 /* motion type */
314 /*-----------------------------------------------------------------------*/
315 {
316 WORD32 i4_motion_type = ps_dec->u2_motion_type;
317
318 if((u2_mb_type & MB_FORW_OR_BACK) && ps_dec->u2_read_motion_type)
319 {
320 ps_dec->u2_motion_type = BITS((UWORD16)u4_next_word,15,14);
321 u2_total_len += MB_MOTION_TYPE_LEN;
322 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_MOTION_TYPE_LEN);
323 i4_motion_type = ps_dec->u2_motion_type;
324
325 }
326
327
328 if ((u2_mb_type & MB_FORW_OR_BACK) &&
329 ((i4_motion_type == 0) ||
330 (i4_motion_type == 3) ||
331 (i4_motion_type == 4) ||
332 (i4_motion_type >= 7)))
333 {
334 //TODO: VANG Check for validity
335 i4_motion_type = 1;
336 }
337
338 }
339 /*-----------------------------------------------------------------------*/
340 /* dct type */
341 /*-----------------------------------------------------------------------*/
342 {
343 if((u2_mb_type & MB_CODED) && ps_dec->u2_read_dct_type)
344 {
345 ps_dec->u2_field_dct = BIT((UWORD16)u4_next_word,15);
346 u2_total_len += MB_DCT_TYPE_LEN;
347 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_DCT_TYPE_LEN);
348 }
349 }
350 /*-----------------------------------------------------------------------*/
351 /* Quant scale code */
352 /*-----------------------------------------------------------------------*/
353 if(u2_mb_type & MB_QUANT)
354 {
355 UWORD16 u2_quant_scale_code;
356 u2_quant_scale_code = BITS((UWORD16)u4_next_word,15,11);
357
358 ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
359 gau1_impeg2_non_linear_quant_scale[u2_quant_scale_code] : (u2_quant_scale_code << 1);
360 u2_total_len += MB_QUANT_SCALE_CODE_LEN;
361 }
362 impeg2d_bit_stream_flush(ps_stream,u2_total_len);
363 /*-----------------------------------------------------------------------*/
364 /* Set the function pointers */
365 /*-----------------------------------------------------------------------*/
366 ps_dec->u2_coded_mb = (UWORD16)(u2_mb_type & MB_CODED);
367
368 if(u2_mb_type & MB_BIDRECT)
369 {
370 UWORD16 u2_index = (ps_dec->u2_motion_type);
371
372 ps_dec->u2_prev_intra_mb = 0;
373 ps_dec->e_mb_pred = BIDIRECT;
374 ps_dec_mb_params = &ps_dec->ps_func_bi_direct[u2_index];
375 ps_dec->s_mb_type = ps_dec_mb_params->s_mb_type;
376 ps_dec_mb_params->pf_func_mb_params(ps_dec);
377 }
378 else if(u2_mb_type & MB_FORW_OR_BACK)
379 {
380
381 UWORD16 u2_refPic = !(u2_mb_type & MB_MV_FORW);
382 UWORD16 u2_index = (ps_dec->u2_motion_type);
383 ps_dec->u2_prev_intra_mb = 0;
384 ps_dec->e_mb_pred = (e_pred_direction_t)u2_refPic;
385 ps_dec_mb_params = &ps_dec->ps_func_forw_or_back[u2_index];
386 ps_dec->s_mb_type = ps_dec_mb_params->s_mb_type;
387 ps_dec_mb_params->pf_func_mb_params(ps_dec);
388
389 }
390 else if(u2_mb_type & MB_TYPE_INTRA)
391 {
392 ps_dec->u2_prev_intra_mb = 1;
393 impeg2d_dec_intra_mb(ps_dec);
394
395 }
396 else
397 {
398 ps_dec->u2_prev_intra_mb =0;
399 ps_dec->e_mb_pred = FORW;
400 ps_dec->u2_motion_type = 0;
401 impeg2d_dec_0mv_coded_mb(ps_dec);
402 }
403
404 /*-----------------------------------------------------------------------*/
405 /* decode cbp */
406 /*-----------------------------------------------------------------------*/
407 if((u2_mb_type & MB_TYPE_INTRA))
408 {
409 ps_dec->u2_cbp = 0x3f;
410 ps_dec->u2_prev_intra_mb = 1;
411 }
412 else
413 {
414 ps_dec->u2_prev_intra_mb = 0;
415 ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision;
416 ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
417 ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
418 if((ps_dec->u2_coded_mb))
419 {
420 UWORD16 cbpValue;
421 cbpValue = gau2_impeg2d_cbp_code[impeg2d_bit_stream_nxt(ps_stream,MB_CBP_LEN)];
422 ps_dec->u2_cbp = cbpValue & 0xFF;
423 impeg2d_bit_stream_flush(ps_stream,(cbpValue >> 8) & 0x0FF);
424 }
425 else
426 {
427 ps_dec->u2_cbp = 0;
428 }
429 }
430 }
431
432 /*******************************************************************************
433 * Function Name : impeg2d_dec_p_b_slice
434 *
435 * Description : Decodes P and B slices
436 *
437 * Arguments :
438 * dec : Decoder state
439 *
440 * Values Returned : None
441 *******************************************************************************/
impeg2d_dec_p_b_slice(dec_state_t * ps_dec)442 IMPEG2D_ERROR_CODES_T impeg2d_dec_p_b_slice(dec_state_t *ps_dec)
443 {
444 WORD16 *pi2_vld_out;
445 UWORD32 i;
446 yuv_buf_t *ps_cur_frm_buf = &ps_dec->s_cur_frm_buf;
447
448 UWORD32 u4_frm_offset = 0;
449 const dec_mb_params_t *ps_dec_mb_params;
450 IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
451
452 pi2_vld_out = ps_dec->ai2_vld_buf;
453 memset(ps_dec->ai2_pred_mv,0,sizeof(ps_dec->ai2_pred_mv));
454
455 ps_dec->u2_prev_intra_mb = 0;
456 ps_dec->u2_first_mb = 1;
457
458 ps_dec->u2_picture_width = ps_dec->u2_frame_width;
459
460 if(ps_dec->u2_picture_structure != FRAME_PICTURE)
461 {
462 ps_dec->u2_picture_width <<= 1;
463 if(ps_dec->u2_picture_structure == BOTTOM_FIELD)
464 {
465 u4_frm_offset = ps_dec->u2_frame_width;
466 }
467 }
468
469 do
470 {
471 UWORD32 u4_x_offset, u4_y_offset;
472
473
474
475 UWORD32 u4_x_dst_offset = 0;
476 UWORD32 u4_y_dst_offset = 0;
477 UWORD8 *pu1_out_p;
478 UWORD8 *pu1_pred;
479 WORD32 u4_pred_strd;
480
481 IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y);
482
483
484 if(ps_dec->e_pic_type == B_PIC)
485 impeg2d_dec_pnb_mb_params(ps_dec);
486 else
487 impeg2d_dec_p_mb_params(ps_dec);
488
489 IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y);
490
491 u4_x_dst_offset = u4_frm_offset + (ps_dec->u2_mb_x << 4);
492 u4_y_dst_offset = (ps_dec->u2_mb_y << 4) * ps_dec->u2_picture_width;
493 pu1_out_p = ps_cur_frm_buf->pu1_y + u4_x_dst_offset + u4_y_dst_offset;
494 if(ps_dec->u2_prev_intra_mb == 0)
495 {
496 UWORD32 offset_x, offset_y, stride;
497 UWORD16 index = (ps_dec->u2_motion_type);
498 /*only for non intra mb's*/
499 if(ps_dec->e_mb_pred == BIDIRECT)
500 {
501 ps_dec_mb_params = &ps_dec->ps_func_bi_direct[index];
502 }
503 else
504 {
505 ps_dec_mb_params = &ps_dec->ps_func_forw_or_back[index];
506 }
507
508 stride = ps_dec->u2_picture_width;
509
510 offset_x = u4_frm_offset + (ps_dec->u2_mb_x << 4);
511
512 offset_y = (ps_dec->u2_mb_y << 4);
513
514 ps_dec->s_dest_buf.pu1_y = ps_cur_frm_buf->pu1_y + offset_y * stride + offset_x;
515
516 stride = stride >> 1;
517
518 ps_dec->s_dest_buf.pu1_u = ps_cur_frm_buf->pu1_u + (offset_y >> 1) * stride
519 + (offset_x >> 1);
520
521 ps_dec->s_dest_buf.pu1_v = ps_cur_frm_buf->pu1_v + (offset_y >> 1) * stride
522 + (offset_x >> 1);
523
524 PROFILE_DISABLE_MC_IF0
525 ps_dec_mb_params->pf_mc(ps_dec);
526
527 }
528 for(i = 0; i < NUM_LUMA_BLKS; ++i)
529 {
530 if((ps_dec->u2_cbp & (1 << (BLOCKS_IN_MB - 1 - i))) != 0)
531 {
532 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix,
533 ps_dec->u2_prev_intra_mb, Y_LUMA, 0);
534 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
535 {
536 return e_error;
537 }
538
539 u4_x_offset = gai2_impeg2_blk_x_off[i];
540
541 if(ps_dec->u2_field_dct == 0)
542 u4_y_offset = gai2_impeg2_blk_y_off_frm[i] ;
543 else
544 u4_y_offset = gai2_impeg2_blk_y_off_fld[i] ;
545
546
547
548
549
550 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
551
552 PROFILE_DISABLE_IDCT_IF0
553 {
554 WORD32 idx;
555 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
556 idx = 0;
557 else
558 idx = 1;
559
560 if(0 == ps_dec->u2_prev_intra_mb)
561 {
562 pu1_pred = pu1_out_p + u4_y_offset * ps_dec->u2_picture_width + u4_x_offset;
563 u4_pred_strd = ps_dec->u2_picture_width << ps_dec->u2_field_dct;
564 }
565 else
566 {
567 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf;
568 u4_pred_strd = 8;
569 }
570
571 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
572 ps_dec->ai2_idct_stg1,
573 pu1_pred,
574 pu1_out_p + u4_y_offset * ps_dec->u2_picture_width + u4_x_offset,
575 8,
576 u4_pred_strd,
577 ps_dec->u2_picture_width << ps_dec->u2_field_dct,
578 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
579 }
580 }
581
582 }
583
584 /* For U and V blocks, divide the x and y offsets by 2. */
585 u4_x_dst_offset >>= 1;
586 u4_y_dst_offset >>= 2;
587
588
589 /* In case of chrominance blocks the DCT will be frame DCT */
590 /* i = 0, U component and i = 1 is V componet */
591 if((ps_dec->u2_cbp & 0x02) != 0)
592 {
593 pu1_out_p = ps_cur_frm_buf->pu1_u + u4_x_dst_offset + u4_y_dst_offset;
594 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix,
595 ps_dec->u2_prev_intra_mb, U_CHROMA, 0);
596 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
597 {
598 return e_error;
599 }
600
601
602 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
603
604 PROFILE_DISABLE_IDCT_IF0
605 {
606 WORD32 idx;
607 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
608 idx = 0;
609 else
610 idx = 1;
611
612 if(0 == ps_dec->u2_prev_intra_mb)
613 {
614 pu1_pred = pu1_out_p;
615 u4_pred_strd = ps_dec->u2_picture_width >> 1;
616 }
617 else
618 {
619 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf;
620 u4_pred_strd = 8;
621 }
622
623 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
624 ps_dec->ai2_idct_stg1,
625 pu1_pred,
626 pu1_out_p,
627 8,
628 u4_pred_strd,
629 ps_dec->u2_picture_width >> 1,
630 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
631
632 }
633
634 }
635
636
637 if((ps_dec->u2_cbp & 0x01) != 0)
638 {
639 pu1_out_p = ps_cur_frm_buf->pu1_v + u4_x_dst_offset + u4_y_dst_offset;
640 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix,
641 ps_dec->u2_prev_intra_mb, V_CHROMA, 0);
642 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
643 {
644 return e_error;
645 }
646
647
648 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
649
650 PROFILE_DISABLE_IDCT_IF0
651 {
652 WORD32 idx;
653 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
654 idx = 0;
655 else
656 idx = 1;
657 if(0 == ps_dec->u2_prev_intra_mb)
658 {
659 pu1_pred = pu1_out_p;
660 u4_pred_strd = ps_dec->u2_picture_width >> 1;
661 }
662 else
663 {
664 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf;
665 u4_pred_strd = 8;
666 }
667
668 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
669 ps_dec->ai2_idct_stg1,
670 pu1_pred,
671 pu1_out_p,
672 8,
673 u4_pred_strd,
674 ps_dec->u2_picture_width >> 1,
675 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
676
677 }
678 }
679
680
681 ps_dec->u2_num_mbs_left--;
682 ps_dec->u2_first_mb = 0;
683 ps_dec->u2_mb_x++;
684
685 if(ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset)
686 {
687 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
688 }
689 else if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb)
690 {
691 ps_dec->u2_mb_x = 0;
692 ps_dec->u2_mb_y++;
693
694 }
695 }
696 while(ps_dec->u2_num_mbs_left != 0 && impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,23) != 0x0);
697 return e_error;
698 }
699