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 WORD32 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 if(NULL == ps_dec_mb_params->pf_func_mb_params)
184 return -1;
185 ps_dec_mb_params->pf_func_mb_params(ps_dec);
186
187 }
188 else if(u2_mb_type & MB_TYPE_INTRA)
189 {
190 ps_dec->u2_prev_intra_mb = 1;
191 impeg2d_dec_intra_mb(ps_dec);
192
193 }
194 else
195 {
196 ps_dec->u2_prev_intra_mb = 0;
197 ps_dec->e_mb_pred = FORW;
198 ps_dec->u2_motion_type = 0;
199 impeg2d_dec_0mv_coded_mb(ps_dec);
200 }
201
202 /*-----------------------------------------------------------------------*/
203 /* decode cbp */
204 /*-----------------------------------------------------------------------*/
205 if((u2_mb_type & MB_TYPE_INTRA))
206 {
207 ps_dec->u2_cbp = 0x3f;
208 ps_dec->u2_prev_intra_mb = 1;
209 }
210 else
211 {
212 ps_dec->u2_prev_intra_mb = 0;
213 ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision;
214 ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
215 ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
216 if((ps_dec->u2_coded_mb))
217 {
218 UWORD16 cbpValue;
219 cbpValue = gau2_impeg2d_cbp_code[impeg2d_bit_stream_nxt(ps_stream,MB_CBP_LEN)];
220 ps_dec->u2_cbp = cbpValue & 0xFF;
221 impeg2d_bit_stream_flush(ps_stream,(cbpValue >> 8) & 0x0FF);
222 }
223 else
224 {
225 ps_dec->u2_cbp = 0;
226 }
227 }
228 return 0;
229 }
230
231
232 /*******************************************************************************
233 *
234 * Function Name : impeg2d_dec_pnb_mb_params
235 *
236 * Description : Decodes the parameters for P and B pictures
237 *
238 * Arguments :
239 * dec : Decoder context
240 *
241 * Values Returned : None
242 *******************************************************************************/
impeg2d_dec_pnb_mb_params(dec_state_t * ps_dec)243 WORD32 impeg2d_dec_pnb_mb_params(dec_state_t *ps_dec)
244 {
245 stream_t *ps_stream = &ps_dec->s_bit_stream;
246 UWORD16 u2_mb_addr_incr;
247 UWORD16 u2_total_len;
248 UWORD16 u2_len;
249 UWORD16 u2_mb_type;
250 UWORD32 u4_next_word;
251 const dec_mb_params_t *ps_dec_mb_params;
252 if(impeg2d_bit_stream_nxt(ps_stream,1) == 1)
253 {
254 impeg2d_bit_stream_flush(ps_stream,1);
255
256 }
257 else
258 {
259 u2_mb_addr_incr = impeg2d_get_mb_addr_incr(ps_stream);
260
261 if(ps_dec->u2_first_mb)
262 {
263 /****************************************************************/
264 /* Section 6.3.17 */
265 /* The first MB of a slice cannot be skipped */
266 /* But the mb_addr_incr can be > 1, because at the beginning of */
267 /* a slice, it indicates the offset from the last MB in the */
268 /* previous row. Hence for the first slice in a row, the */
269 /* mb_addr_incr needs to be 1. */
270 /****************************************************************/
271 /* MB_x is set to zero whenever MB_y changes. */
272 ps_dec->u2_mb_x = u2_mb_addr_incr - 1;
273 /* For error resilience */
274 ps_dec->u2_mb_x = MIN(ps_dec->u2_mb_x, (ps_dec->u2_num_horiz_mb - 1));
275
276 /****************************************************************/
277 /* mb_addr_incr is forced to 1 because in this decoder it is used */
278 /* more as an indicator of the number of MBs skipped than the */
279 /* as defined by the standard (Section 6.3.17) */
280 /****************************************************************/
281 u2_mb_addr_incr = 1;
282 ps_dec->u2_first_mb = 0;
283 }
284 else
285 {
286 /****************************************************************/
287 /* In MPEG-2, the last MB of the row cannot be skipped and the */
288 /* mb_addr_incr cannot be such that it will take the current MB */
289 /* beyond the current row */
290 /* In MPEG-1, the slice could start and end anywhere and is not */
291 /* restricted to a row like in MPEG-2. Hence this check should */
292 /* not be done for MPEG-1 streams. */
293 /****************************************************************/
294 if(ps_dec->u2_is_mpeg2 &&
295 ((ps_dec->u2_mb_x + u2_mb_addr_incr) > ps_dec->u2_num_horiz_mb))
296 {
297 u2_mb_addr_incr = ps_dec->u2_num_horiz_mb - ps_dec->u2_mb_x;
298 }
299
300
301 impeg2d_dec_skip_mbs(ps_dec, (UWORD16)(u2_mb_addr_incr - 1));
302 }
303
304 }
305 u4_next_word = (UWORD16)impeg2d_bit_stream_nxt(ps_stream,16);
306 /*-----------------------------------------------------------------------*/
307 /* MB type */
308 /*-----------------------------------------------------------------------*/
309 {
310 u2_mb_type = ps_dec->pu2_mb_type[BITS((UWORD16)u4_next_word,15,10)];
311 u2_len = BITS(u2_mb_type,15,8);
312 u2_total_len = u2_len;
313 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << u2_len);
314 }
315 /*-----------------------------------------------------------------------*/
316 /* motion type */
317 /*-----------------------------------------------------------------------*/
318 {
319 WORD32 i4_motion_type = ps_dec->u2_motion_type;
320
321 if((u2_mb_type & MB_FORW_OR_BACK) && ps_dec->u2_read_motion_type)
322 {
323 ps_dec->u2_motion_type = BITS((UWORD16)u4_next_word,15,14);
324 u2_total_len += MB_MOTION_TYPE_LEN;
325 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_MOTION_TYPE_LEN);
326 i4_motion_type = ps_dec->u2_motion_type;
327
328 }
329
330
331 if ((u2_mb_type & MB_FORW_OR_BACK) &&
332 ((i4_motion_type == 0) ||
333 (i4_motion_type == 3) ||
334 (i4_motion_type == 4) ||
335 (i4_motion_type >= 7)))
336 {
337 //TODO: VANG Check for validity
338 i4_motion_type = 1;
339 }
340
341 }
342 /*-----------------------------------------------------------------------*/
343 /* dct type */
344 /*-----------------------------------------------------------------------*/
345 {
346 if((u2_mb_type & MB_CODED) && ps_dec->u2_read_dct_type)
347 {
348 ps_dec->u2_field_dct = BIT((UWORD16)u4_next_word,15);
349 u2_total_len += MB_DCT_TYPE_LEN;
350 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_DCT_TYPE_LEN);
351 }
352 }
353 /*-----------------------------------------------------------------------*/
354 /* Quant scale code */
355 /*-----------------------------------------------------------------------*/
356 if(u2_mb_type & MB_QUANT)
357 {
358 UWORD16 u2_quant_scale_code;
359 u2_quant_scale_code = BITS((UWORD16)u4_next_word,15,11);
360
361 ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
362 gau1_impeg2_non_linear_quant_scale[u2_quant_scale_code] : (u2_quant_scale_code << 1);
363 u2_total_len += MB_QUANT_SCALE_CODE_LEN;
364 }
365 impeg2d_bit_stream_flush(ps_stream,u2_total_len);
366 /*-----------------------------------------------------------------------*/
367 /* Set the function pointers */
368 /*-----------------------------------------------------------------------*/
369 ps_dec->u2_coded_mb = (UWORD16)(u2_mb_type & MB_CODED);
370
371 if(u2_mb_type & MB_BIDRECT)
372 {
373 UWORD16 u2_index = (ps_dec->u2_motion_type);
374
375 ps_dec->u2_prev_intra_mb = 0;
376 ps_dec->e_mb_pred = BIDIRECT;
377 ps_dec_mb_params = &ps_dec->ps_func_bi_direct[u2_index];
378 ps_dec->s_mb_type = ps_dec_mb_params->s_mb_type;
379 if(NULL == ps_dec_mb_params->pf_func_mb_params)
380 return -1;
381 ps_dec_mb_params->pf_func_mb_params(ps_dec);
382 }
383 else if(u2_mb_type & MB_FORW_OR_BACK)
384 {
385
386 UWORD16 u2_refPic = !(u2_mb_type & MB_MV_FORW);
387 UWORD16 u2_index = (ps_dec->u2_motion_type);
388 ps_dec->u2_prev_intra_mb = 0;
389 ps_dec->e_mb_pred = (e_pred_direction_t)u2_refPic;
390 ps_dec_mb_params = &ps_dec->ps_func_forw_or_back[u2_index];
391 ps_dec->s_mb_type = ps_dec_mb_params->s_mb_type;
392 if(NULL == ps_dec_mb_params->pf_func_mb_params)
393 return -1;
394 ps_dec_mb_params->pf_func_mb_params(ps_dec);
395
396 }
397 else if(u2_mb_type & MB_TYPE_INTRA)
398 {
399 ps_dec->u2_prev_intra_mb = 1;
400 impeg2d_dec_intra_mb(ps_dec);
401
402 }
403 else
404 {
405 ps_dec->u2_prev_intra_mb =0;
406 ps_dec->e_mb_pred = FORW;
407 ps_dec->u2_motion_type = 0;
408 impeg2d_dec_0mv_coded_mb(ps_dec);
409 }
410
411 /*-----------------------------------------------------------------------*/
412 /* decode cbp */
413 /*-----------------------------------------------------------------------*/
414 if((u2_mb_type & MB_TYPE_INTRA))
415 {
416 ps_dec->u2_cbp = 0x3f;
417 ps_dec->u2_prev_intra_mb = 1;
418 }
419 else
420 {
421 ps_dec->u2_prev_intra_mb = 0;
422 ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision;
423 ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
424 ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
425 if((ps_dec->u2_coded_mb))
426 {
427 UWORD16 cbpValue;
428 cbpValue = gau2_impeg2d_cbp_code[impeg2d_bit_stream_nxt(ps_stream,MB_CBP_LEN)];
429 ps_dec->u2_cbp = cbpValue & 0xFF;
430 impeg2d_bit_stream_flush(ps_stream,(cbpValue >> 8) & 0x0FF);
431 }
432 else
433 {
434 ps_dec->u2_cbp = 0;
435 }
436 }
437 return 0;
438 }
439
440 /*******************************************************************************
441 * Function Name : impeg2d_dec_p_b_slice
442 *
443 * Description : Decodes P and B slices
444 *
445 * Arguments :
446 * dec : Decoder state
447 *
448 * Values Returned : None
449 *******************************************************************************/
impeg2d_dec_p_b_slice(dec_state_t * ps_dec)450 IMPEG2D_ERROR_CODES_T impeg2d_dec_p_b_slice(dec_state_t *ps_dec)
451 {
452 WORD16 *pi2_vld_out;
453 UWORD32 i;
454 yuv_buf_t *ps_cur_frm_buf = &ps_dec->s_cur_frm_buf;
455
456 UWORD32 u4_frm_offset = 0;
457 const dec_mb_params_t *ps_dec_mb_params;
458 IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
459
460 pi2_vld_out = ps_dec->ai2_vld_buf;
461 memset(ps_dec->ai2_pred_mv,0,sizeof(ps_dec->ai2_pred_mv));
462
463 ps_dec->u2_prev_intra_mb = 0;
464 ps_dec->u2_first_mb = 1;
465
466 ps_dec->u2_picture_width = ps_dec->u2_frame_width;
467
468 if(ps_dec->u2_picture_structure != FRAME_PICTURE)
469 {
470 ps_dec->u2_picture_width <<= 1;
471 if(ps_dec->u2_picture_structure == BOTTOM_FIELD)
472 {
473 u4_frm_offset = ps_dec->u2_frame_width;
474 }
475 }
476
477 do
478 {
479 UWORD32 u4_x_offset, u4_y_offset;
480 WORD32 ret;
481
482
483 UWORD32 u4_x_dst_offset = 0;
484 UWORD32 u4_y_dst_offset = 0;
485 UWORD8 *pu1_out_p;
486 UWORD8 *pu1_pred;
487 WORD32 u4_pred_strd;
488
489 IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y);
490
491
492 if(ps_dec->e_pic_type == B_PIC)
493 ret = impeg2d_dec_pnb_mb_params(ps_dec);
494 else
495 ret = impeg2d_dec_p_mb_params(ps_dec);
496
497 if(ret)
498 return IMPEG2D_MB_TEX_DECODE_ERR;
499 IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y);
500
501 u4_x_dst_offset = u4_frm_offset + (ps_dec->u2_mb_x << 4);
502 u4_y_dst_offset = (ps_dec->u2_mb_y << 4) * ps_dec->u2_picture_width;
503 pu1_out_p = ps_cur_frm_buf->pu1_y + u4_x_dst_offset + u4_y_dst_offset;
504 if(ps_dec->u2_prev_intra_mb == 0)
505 {
506 UWORD32 offset_x, offset_y, stride;
507 UWORD16 index = (ps_dec->u2_motion_type);
508 /*only for non intra mb's*/
509 if(ps_dec->e_mb_pred == BIDIRECT)
510 {
511 ps_dec_mb_params = &ps_dec->ps_func_bi_direct[index];
512 }
513 else
514 {
515 ps_dec_mb_params = &ps_dec->ps_func_forw_or_back[index];
516 }
517
518 stride = ps_dec->u2_picture_width;
519
520 offset_x = u4_frm_offset + (ps_dec->u2_mb_x << 4);
521
522 offset_y = (ps_dec->u2_mb_y << 4);
523
524 ps_dec->s_dest_buf.pu1_y = ps_cur_frm_buf->pu1_y + offset_y * stride + offset_x;
525
526 stride = stride >> 1;
527
528 ps_dec->s_dest_buf.pu1_u = ps_cur_frm_buf->pu1_u + (offset_y >> 1) * stride
529 + (offset_x >> 1);
530
531 ps_dec->s_dest_buf.pu1_v = ps_cur_frm_buf->pu1_v + (offset_y >> 1) * stride
532 + (offset_x >> 1);
533
534 PROFILE_DISABLE_MC_IF0
535 ps_dec_mb_params->pf_mc(ps_dec);
536
537 }
538 for(i = 0; i < NUM_LUMA_BLKS; ++i)
539 {
540 if((ps_dec->u2_cbp & (1 << (BLOCKS_IN_MB - 1 - i))) != 0)
541 {
542 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix,
543 ps_dec->u2_prev_intra_mb, Y_LUMA, 0);
544 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
545 {
546 return e_error;
547 }
548
549 u4_x_offset = gai2_impeg2_blk_x_off[i];
550
551 if(ps_dec->u2_field_dct == 0)
552 u4_y_offset = gai2_impeg2_blk_y_off_frm[i] ;
553 else
554 u4_y_offset = gai2_impeg2_blk_y_off_fld[i] ;
555
556
557
558
559
560 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
561
562 PROFILE_DISABLE_IDCT_IF0
563 {
564 WORD32 idx;
565 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
566 idx = 0;
567 else
568 idx = 1;
569
570 if(0 == ps_dec->u2_prev_intra_mb)
571 {
572 pu1_pred = pu1_out_p + u4_y_offset * ps_dec->u2_picture_width + u4_x_offset;
573 u4_pred_strd = ps_dec->u2_picture_width << ps_dec->u2_field_dct;
574 }
575 else
576 {
577 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf;
578 u4_pred_strd = 8;
579 }
580
581 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
582 ps_dec->ai2_idct_stg1,
583 pu1_pred,
584 pu1_out_p + u4_y_offset * ps_dec->u2_picture_width + u4_x_offset,
585 8,
586 u4_pred_strd,
587 ps_dec->u2_picture_width << ps_dec->u2_field_dct,
588 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
589 }
590 }
591
592 }
593
594 /* For U and V blocks, divide the x and y offsets by 2. */
595 u4_x_dst_offset >>= 1;
596 u4_y_dst_offset >>= 2;
597
598
599 /* In case of chrominance blocks the DCT will be frame DCT */
600 /* i = 0, U component and i = 1 is V componet */
601 if((ps_dec->u2_cbp & 0x02) != 0)
602 {
603 pu1_out_p = ps_cur_frm_buf->pu1_u + u4_x_dst_offset + u4_y_dst_offset;
604 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix,
605 ps_dec->u2_prev_intra_mb, U_CHROMA, 0);
606 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
607 {
608 return e_error;
609 }
610
611
612 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
613
614 PROFILE_DISABLE_IDCT_IF0
615 {
616 WORD32 idx;
617 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
618 idx = 0;
619 else
620 idx = 1;
621
622 if(0 == ps_dec->u2_prev_intra_mb)
623 {
624 pu1_pred = pu1_out_p;
625 u4_pred_strd = ps_dec->u2_picture_width >> 1;
626 }
627 else
628 {
629 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf;
630 u4_pred_strd = 8;
631 }
632
633 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
634 ps_dec->ai2_idct_stg1,
635 pu1_pred,
636 pu1_out_p,
637 8,
638 u4_pred_strd,
639 ps_dec->u2_picture_width >> 1,
640 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
641
642 }
643
644 }
645
646
647 if((ps_dec->u2_cbp & 0x01) != 0)
648 {
649 pu1_out_p = ps_cur_frm_buf->pu1_v + u4_x_dst_offset + u4_y_dst_offset;
650 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix,
651 ps_dec->u2_prev_intra_mb, V_CHROMA, 0);
652 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
653 {
654 return e_error;
655 }
656
657
658 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
659
660 PROFILE_DISABLE_IDCT_IF0
661 {
662 WORD32 idx;
663 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
664 idx = 0;
665 else
666 idx = 1;
667 if(0 == ps_dec->u2_prev_intra_mb)
668 {
669 pu1_pred = pu1_out_p;
670 u4_pred_strd = ps_dec->u2_picture_width >> 1;
671 }
672 else
673 {
674 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf;
675 u4_pred_strd = 8;
676 }
677
678 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
679 ps_dec->ai2_idct_stg1,
680 pu1_pred,
681 pu1_out_p,
682 8,
683 u4_pred_strd,
684 ps_dec->u2_picture_width >> 1,
685 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
686
687 }
688 }
689
690
691 ps_dec->u2_num_mbs_left--;
692 ps_dec->u2_first_mb = 0;
693 ps_dec->u2_mb_x++;
694
695 if(ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset)
696 {
697 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
698 }
699 else if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb)
700 {
701 ps_dec->u2_mb_x = 0;
702 ps_dec->u2_mb_y++;
703
704 }
705 }
706 while(ps_dec->u2_num_mbs_left != 0 && impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,23) != 0x0);
707 return e_error;
708 }
709