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 <string.h>
21 #ifdef __ANDROID__
22 #include <cutils/log.h>
23 #endif
24 #include "iv_datatypedef.h"
25 #include "iv.h"
26 #include "ivd.h"
27 #include "impeg2_macros.h"
28 #include "impeg2_buf_mgr.h"
29 #include "impeg2_disp_mgr.h"
30 #include "impeg2_defs.h"
31 #include "impeg2_inter_pred.h"
32 #include "impeg2_idct.h"
33 #include "impeg2_format_conv.h"
34 #include "impeg2_mem_func.h"
35 #include "impeg2_platform_macros.h"
36 #include "ithread.h"
37 #include "impeg2_job_queue.h"
38
39 #include "impeg2d.h"
40 #include "impeg2d_bitstream.h"
41 #include "impeg2d_api.h"
42 #include "impeg2d_structs.h"
43 #include "impeg2_globals.h"
44 #include "impeg2d_pic_proc.h"
45 #include "impeg2d_deinterlace.h"
46
47
48 /*****************************************************************************
49 * MPEG2 Constants for Parse Check
50 ******************************************************************************/
51 #define MPEG2_MAX_FRAME_RATE_CODE 8
52
53 /******************************************************************************
54 * Function Name : impeg2d_next_start_code
55 *
56 * Description : Peek for next_start_code from the stream_t.
57 *
58 * Arguments :
59 * dec : Decoder Context
60 *
61 * Values Returned : None
62 ******************************************************************************/
impeg2d_next_start_code(dec_state_t * ps_dec)63 void impeg2d_next_start_code(dec_state_t *ps_dec)
64 {
65 stream_t *ps_stream;
66 ps_stream = &ps_dec->s_bit_stream;
67 impeg2d_bit_stream_flush_to_byte_boundary(ps_stream);
68
69 while ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX)
70 && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
71 {
72 impeg2d_bit_stream_get(ps_stream,8);
73 }
74 return;
75 }
76 /******************************************************************************
77 * Function Name : impeg2d_next_code
78 *
79 * Description : Peek for next_start_code from the stream_t.
80 *
81 * Arguments :
82 * dec : Decoder Context
83 *
84 * Values Returned : None
85 ******************************************************************************/
impeg2d_next_code(dec_state_t * ps_dec,UWORD32 u4_start_code_val)86 void impeg2d_next_code(dec_state_t *ps_dec, UWORD32 u4_start_code_val)
87 {
88 stream_t *ps_stream;
89 ps_stream = &ps_dec->s_bit_stream;
90 impeg2d_bit_stream_flush_to_byte_boundary(ps_stream);
91
92 while ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) != u4_start_code_val) &&
93 (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
94 {
95
96 if (impeg2d_bit_stream_get(ps_stream,8) != 0)
97 {
98 /* Ignore stuffing bit errors. */
99 }
100
101 }
102 return;
103 }
104 /******************************************************************************
105 * Function Name : impeg2d_peek_next_start_code
106 *
107 * Description : Peek for next_start_code from the stream_t.
108 *
109 * Arguments :
110 * dec : Decoder Context
111 *
112 * Values Returned : None
113 ******************************************************************************/
impeg2d_peek_next_start_code(dec_state_t * ps_dec)114 void impeg2d_peek_next_start_code(dec_state_t *ps_dec)
115 {
116 stream_t *ps_stream;
117 ps_stream = &ps_dec->s_bit_stream;
118 impeg2d_bit_stream_flush_to_byte_boundary(ps_stream);
119
120 while ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX)
121 && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
122 {
123 impeg2d_bit_stream_get(ps_stream,8);
124 }
125 return;
126 }
127 /******************************************************************************
128 *
129 * Function Name : impeg2d_dec_seq_hdr
130 *
131 * Description : Decodes Sequence header information
132 *
133 * Arguments :
134 * dec : Decoder Context
135 *
136 * Values Returned : None
137 ******************************************************************************/
impeg2d_dec_seq_hdr(dec_state_t * ps_dec)138 IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_hdr(dec_state_t *ps_dec)
139 {
140 stream_t *ps_stream;
141 ps_stream = &ps_dec->s_bit_stream;
142 UWORD16 u2_height;
143 UWORD16 u2_width;
144
145 if (impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) != SEQUENCE_HEADER_CODE)
146 {
147 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
148 return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND;
149
150 }
151 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
152
153 u2_width = impeg2d_bit_stream_get(ps_stream,12);
154 u2_height = impeg2d_bit_stream_get(ps_stream,12);
155
156 if (0 == u2_width || 0 == u2_height)
157 {
158 IMPEG2D_ERROR_CODES_T e_error = IMPEG2D_FRM_HDR_DECODE_ERR;
159 return e_error;
160 }
161
162 if ((u2_width != ps_dec->u2_horizontal_size)
163 || (u2_height != ps_dec->u2_vertical_size))
164 {
165 if (0 == ps_dec->u2_header_done)
166 {
167 /* This is the first time we are reading the resolution */
168 ps_dec->u2_horizontal_size = u2_width;
169 ps_dec->u2_vertical_size = u2_height;
170 }
171 else
172 {
173 if (0 == ps_dec->i4_pic_count)
174 {
175 /* Decoder has not decoded a single frame since the last
176 * reset/init. This implies that we have two headers in the
177 * input stream. So, do not indicate a resolution change, since
178 * this can take the decoder into an infinite loop.
179 */
180 return (IMPEG2D_ERROR_CODES_T) IMPEG2D_FRM_HDR_DECODE_ERR;
181 }
182 else if((u2_width > ps_dec->u2_create_max_width)
183 || (u2_height > ps_dec->u2_create_max_height))
184 {
185 IMPEG2D_ERROR_CODES_T e_error = IMPEG2D_UNSUPPORTED_DIMENSIONS;
186
187 ps_dec->u2_reinit_max_height = u2_height;
188 ps_dec->u2_reinit_max_width = u2_width;
189
190 return e_error;
191 }
192 else if((ps_dec->u2_horizontal_size < MIN_WIDTH)
193 || (ps_dec->u2_vertical_size < MIN_HEIGHT))
194 {
195 return IMPEG2D_UNSUPPORTED_DIMENSIONS;
196 }
197 else
198 {
199 /* The resolution has changed */
200 return (IMPEG2D_ERROR_CODES_T)IVD_RES_CHANGED;
201 }
202 }
203 }
204
205 if((ps_dec->u2_horizontal_size > ps_dec->u2_create_max_width)
206 || (ps_dec->u2_vertical_size > ps_dec->u2_create_max_height))
207 {
208 IMPEG2D_ERROR_CODES_T e_error = IMPEG2D_UNSUPPORTED_DIMENSIONS;
209 ps_dec->u2_reinit_max_height = ps_dec->u2_vertical_size;
210 ps_dec->u2_reinit_max_width = ps_dec->u2_horizontal_size;
211 return e_error;
212 }
213
214 if((ps_dec->u2_horizontal_size < MIN_WIDTH)
215 || (ps_dec->u2_vertical_size < MIN_HEIGHT))
216 {
217 return IMPEG2D_UNSUPPORTED_DIMENSIONS;
218 }
219
220 /*------------------------------------------------------------------------*/
221 /* Flush the following as they are not being used */
222 /* aspect_ratio_info (4 bits) */
223 /*------------------------------------------------------------------------*/
224 ps_dec->u2_aspect_ratio_info = impeg2d_bit_stream_get(ps_stream,4);
225
226 /*------------------------------------------------------------------------*/
227 /* Frame rate code(4 bits) */
228 /*------------------------------------------------------------------------*/
229 ps_dec->u2_frame_rate_code = impeg2d_bit_stream_get(ps_stream,4);
230 if (ps_dec->u2_frame_rate_code > MPEG2_MAX_FRAME_RATE_CODE)
231 {
232 return IMPEG2D_FRM_HDR_DECODE_ERR;
233 }
234 /*------------------------------------------------------------------------*/
235 /* Flush the following as they are not being used */
236 /* bit_rate_value (18 bits) */
237 /*------------------------------------------------------------------------*/
238 impeg2d_bit_stream_flush(ps_stream,18);
239 GET_MARKER_BIT(ps_dec,ps_stream);
240 /*------------------------------------------------------------------------*/
241 /* Flush the following as they are not being used */
242 /* vbv_buffer_size_value(10 bits), constrained_parameter_flag (1 bit) */
243 /*------------------------------------------------------------------------*/
244 impeg2d_bit_stream_flush(ps_stream,11);
245
246 /*------------------------------------------------------------------------*/
247 /* Quantization matrix for the intra blocks */
248 /*------------------------------------------------------------------------*/
249 if(impeg2d_bit_stream_get_bit(ps_stream) == 1)
250 {
251 UWORD16 i;
252 for(i = 0; i < NUM_PELS_IN_BLOCK; i++)
253 {
254 ps_dec->au1_intra_quant_matrix[gau1_impeg2_inv_scan_zig_zag[i]] = (UWORD8)impeg2d_bit_stream_get(ps_stream,8);
255 }
256
257 }
258 else
259 {
260 memcpy(ps_dec->au1_intra_quant_matrix,gau1_impeg2_intra_quant_matrix_default,
261 NUM_PELS_IN_BLOCK);
262 }
263
264 /*------------------------------------------------------------------------*/
265 /* Quantization matrix for the inter blocks */
266 /*------------------------------------------------------------------------*/
267 if(impeg2d_bit_stream_get_bit(ps_stream) == 1)
268 {
269 UWORD16 i;
270 for(i = 0; i < NUM_PELS_IN_BLOCK; i++)
271 {
272 ps_dec->au1_inter_quant_matrix[gau1_impeg2_inv_scan_zig_zag[i]] = (UWORD8)impeg2d_bit_stream_get(ps_stream,8);
273 }
274 }
275 else
276 {
277 memcpy(ps_dec->au1_inter_quant_matrix,gau1_impeg2_inter_quant_matrix_default,
278 NUM_PELS_IN_BLOCK);
279 }
280 impeg2d_next_start_code(ps_dec);
281
282 return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
283 }
284
285 /******************************************************************************
286 *
287 * Function Name : impeg2d_dec_seq_ext
288 *
289 * Description : Gets additional sequence data.
290 *
291 * Arguments :
292 * dec : Decoder Context
293 *
294 * Values Returned : None
295 ******************************************************************************/
impeg2d_dec_seq_ext(dec_state_t * ps_dec)296 IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_ext(dec_state_t *ps_dec)
297 {
298 stream_t *ps_stream;
299 UWORD16 horizontal_value;
300 UWORD16 vertical_value;
301
302 ps_stream = &ps_dec->s_bit_stream;
303
304 if (impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) != EXTENSION_START_CODE)
305 {
306 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
307 return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND;
308
309 }
310 /* Flush the extension start code */
311 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
312
313 /* Flush extension start code identifier */
314 impeg2d_bit_stream_flush(ps_stream,4);
315
316 /*----------------------------------------------------------------------*/
317 /* Profile and Level information */
318 /*----------------------------------------------------------------------*/
319 {
320 UWORD32 u4_esc_bit, u4_profile, u4_level;
321
322 /* Read the profile and level information */
323 /* check_profile_and_level: Table 8-1 */
324 /* [7:7] 1 Escape bit */
325 /* [6:4] 3 Profile identification */
326 /* [3:0] 4 Level identification */
327
328 u4_esc_bit = impeg2d_bit_stream_get_bit(ps_stream);
329 u4_profile = impeg2d_bit_stream_get(ps_stream,3);
330 u4_level = impeg2d_bit_stream_get(ps_stream,4);
331 UNUSED(u4_profile);
332 UNUSED(u4_level);
333 /*
334 if( escBit == 1 ||
335 profile < MPEG2_MAIN_PROFILE ||
336 level < MPEG2_MAIN_LEVEL)
337 */
338 if (1 == u4_esc_bit)
339 {
340 return IMPEG2D_PROF_LEVEL_NOT_SUPPORTED;
341 }
342 }
343
344 ps_dec->u2_progressive_sequence = impeg2d_bit_stream_get_bit(ps_stream);
345
346 /* Read the chrominance format */
347 if(impeg2d_bit_stream_get(ps_stream,2) != 0x1)
348 return IMPEG2D_CHROMA_FMT_NOT_SUP;
349
350 /* Error resilience: store the 2 most significant bit in horizontal and vertical */
351 /* variables.Use it only if adding them to the vertical and horizontal sizes */
352 /* respectively, doesn't exceed the MAX_WD and MAX_HT supported by the application.*/
353
354
355 /* Read the 2 most significant bits from horizontal_size */
356 horizontal_value = (impeg2d_bit_stream_get(ps_stream,2) << 12);
357
358 /* Read the 2 most significant bits from vertical_size */
359 vertical_value = (impeg2d_bit_stream_get(ps_stream,2) << 12);
360
361 /* Error resilience: The height and width should not be more than the*/
362 /*max height and width the application can support*/
363 if(ps_dec->u2_create_max_height < (ps_dec->u2_vertical_size + vertical_value))
364 {
365 return (IMPEG2D_ERROR_CODES_T) IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED;
366 }
367
368 if(ps_dec->u2_create_max_width < (ps_dec->u2_horizontal_size + horizontal_value))
369 {
370 return (IMPEG2D_ERROR_CODES_T) IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED;
371 }
372 ps_dec->u2_vertical_size += vertical_value;
373 ps_dec->u2_horizontal_size += horizontal_value;
374
375 /*-----------------------------------------------------------------------*/
376 /* Flush the following as they are not used now */
377 /* bit_rate_extension 12 */
378 /* marker_bit 1 */
379 /* vbv_buffer_size_extension 8 */
380 /* low_delay 1 */
381 /*-----------------------------------------------------------------------*/
382 impeg2d_bit_stream_flush(ps_stream,12);
383 GET_MARKER_BIT(ps_dec,ps_stream);
384 impeg2d_bit_stream_flush(ps_stream,9);
385 /*-----------------------------------------------------------------------*/
386 /* frame_rate_extension_n 2 */
387 /* frame_rate_extension_d 5 */
388 /*-----------------------------------------------------------------------*/
389 ps_dec->u2_frame_rate_extension_n = impeg2d_bit_stream_get(ps_stream,2);
390 ps_dec->u2_frame_rate_extension_d = impeg2d_bit_stream_get(ps_stream,5);
391
392 return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
393 }
394
395 /*******************************************************************************
396 *
397 * Function Name : impeg2d_dec_seq_disp_ext
398 *
399 * Description : This function is eqvt to sequence_display_extension() of
400 * standard. It flushes data present as it is not being used
401 *
402 * Arguments :
403 * dec : Decoder Context
404 *
405 * Values Returned : None
406 ******************************************************************************/
impeg2d_dec_seq_disp_ext(dec_state_t * ps_dec)407 void impeg2d_dec_seq_disp_ext(dec_state_t *ps_dec)
408 {
409 stream_t *ps_stream;
410 ps_stream = &ps_dec->s_bit_stream;
411
412 /*
413 sequence_display_extension()
414 {
415 extension_start_code_identifier 4
416 video_format 3
417 colour_description 1
418 if (colour_description)
419 {
420 colour_primaries 8
421 transfer_characteristics 8
422 matrix_coefficients 8
423 }
424 display_horizontal_size 14
425 marker_bit 1
426 display_vertical_size 14
427 next_start_code()
428 }
429 */
430
431 impeg2d_bit_stream_get(ps_stream, 4);
432 ps_dec->u1_video_format = impeg2d_bit_stream_get(ps_stream, 3);
433 ps_dec->u1_colour_description = impeg2d_bit_stream_get(ps_stream, 1);
434 ps_dec->u1_colour_primaries = 2;
435 ps_dec->u1_transfer_characteristics = 2;
436 ps_dec->u1_matrix_coefficients = 2;
437 if(ps_dec->u1_colour_description)
438 {
439 ps_dec->u1_colour_primaries = impeg2d_bit_stream_get(ps_stream, 8);
440 ps_dec->u1_transfer_characteristics = impeg2d_bit_stream_get(ps_stream, 8);
441 ps_dec->u1_matrix_coefficients = impeg2d_bit_stream_get(ps_stream, 8);
442 }
443
444 /* display_horizontal_size and display_vertical_size */
445 ps_dec->u2_display_horizontal_size = impeg2d_bit_stream_get(ps_stream,14);;
446 GET_MARKER_BIT(ps_dec,ps_stream);
447 ps_dec->u2_display_vertical_size = impeg2d_bit_stream_get(ps_stream,14);
448
449 ps_dec->u1_seq_disp_extn_present = 1;
450 impeg2d_next_start_code(ps_dec);
451 }
452
453
454 /*******************************************************************************
455 *
456 * Function Name : impeg2d_dec_seq_scale_ext
457 *
458 * Description : This function is eqvt to sequence_scalable_extension() of
459 * standard.
460 *
461 * Arguments : Decoder context
462 *
463 * Values Returned : None
464 *******************************************************************************/
impeg2d_dec_seq_scale_ext(dec_state_t * ps_dec)465 IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_scale_ext(dec_state_t *ps_dec)
466 {
467 UNUSED(ps_dec);
468 return IMPEG2D_SCALABILITIY_NOT_SUPPORTED;
469 }
470
471 /*******************************************************************************
472 *
473 * Function Name : impeg2d_dec_quant_matrix_ext
474 *
475 * Description : Gets Intra and NonIntra quantizer matrix from the stream.
476 *
477 * Arguments : Decoder context
478 *
479 * Values Returned : None
480 *******************************************************************************/
impeg2d_dec_quant_matrix_ext(dec_state_t * ps_dec)481 void impeg2d_dec_quant_matrix_ext(dec_state_t *ps_dec)
482 {
483 stream_t *ps_stream;
484
485 ps_stream = &ps_dec->s_bit_stream;
486 /* Flush extension_start_code_identifier */
487 impeg2d_bit_stream_flush(ps_stream,4);
488
489 /*------------------------------------------------------------------------*/
490 /* Quantization matrix for the intra blocks */
491 /*------------------------------------------------------------------------*/
492 if(impeg2d_bit_stream_get(ps_stream,1) == 1)
493 {
494 UWORD16 i;
495 for(i = 0; i < NUM_PELS_IN_BLOCK; i++)
496 {
497 ps_dec->au1_intra_quant_matrix[gau1_impeg2_inv_scan_zig_zag[i]] = (UWORD8)impeg2d_bit_stream_get(ps_stream,8);
498 }
499
500 }
501
502
503 /*------------------------------------------------------------------------*/
504 /* Quantization matrix for the inter blocks */
505 /*------------------------------------------------------------------------*/
506 if(impeg2d_bit_stream_get(ps_stream,1) == 1)
507 {
508 UWORD16 i;
509 for(i = 0; i < NUM_PELS_IN_BLOCK; i++)
510 {
511 ps_dec->au1_inter_quant_matrix[gau1_impeg2_inv_scan_zig_zag[i]] = (UWORD8)impeg2d_bit_stream_get(ps_stream,8);
512 }
513 }
514
515 /* Note : chroma intra quantizer matrix and chroma non
516 intra quantizer matrix are not needed for 4:2:0 format */
517 impeg2d_next_start_code(ps_dec);
518 }
519 /*******************************************************************************
520 *
521 * Function Name : impeg2d_dec_pic_disp_ext
522 *
523 * Description : This function is eqvt to picture_display_extension() of
524 * standard.The parameters are not used by decoder
525 *
526 * Arguments : Pointer to dec_state_t
527 *
528 * Values Returned : Decoder context
529 *
530 * Values Returned : None
531 *******************************************************************************/
impeg2d_dec_pic_disp_ext(dec_state_t * ps_dec)532 void impeg2d_dec_pic_disp_ext(dec_state_t *ps_dec)
533 {
534 WORD16 i2_number_of_frame_centre_offsets ;
535 stream_t *ps_stream;
536
537 ps_stream = &ps_dec->s_bit_stream;
538 impeg2d_bit_stream_flush(ps_stream,4);
539
540 if (ps_dec->u2_progressive_sequence)
541 {
542 i2_number_of_frame_centre_offsets = (ps_dec->u2_repeat_first_field) ?
543 2 + ps_dec->u2_top_field_first : 1;
544 }
545 else
546 {
547 i2_number_of_frame_centre_offsets =
548 (ps_dec->u2_picture_structure != FRAME_PICTURE) ?
549 1 : 2 + ps_dec->u2_repeat_first_field;
550 }
551 while(i2_number_of_frame_centre_offsets--)
552 {
553 /* frame_centre_horizontal_offset */
554 impeg2d_bit_stream_get(ps_stream,16);
555 GET_MARKER_BIT(ps_dec,ps_stream);
556 /* frame_centre_vertical_offset */
557 impeg2d_bit_stream_get(ps_stream,16);
558 GET_MARKER_BIT(ps_dec,ps_stream);
559 }
560 impeg2d_next_start_code(ps_dec);
561 }
562
563 /*******************************************************************************
564 *
565 * Function Name : impeg2d_dec_itu_t_ext
566 *
567 * Description : This function is eqvt to ITU-T_extension() of
568 * standard.The parameters are not used by decoder
569 *
570 * Arguments : Decoder context
571 *
572 * Values Returned : None
573 *******************************************************************************/
impeg2d_dec_itu_t_ext(dec_state_t * ps_dec)574 void impeg2d_dec_itu_t_ext(dec_state_t *ps_dec)
575 {
576 impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,EXT_ID_LEN);
577 impeg2d_next_start_code(ps_dec);
578 }
579
580 /*******************************************************************************
581 * Function Name : impeg2d_dec_copyright_ext
582 *
583 * Description : This function is eqvt to copyright_extension() of
584 * standard. The parameters are not used by decoder
585 *
586 * Arguments : Decoder context
587 *
588 * Values Returned : None
589 *******************************************************************************/
590
591
impeg2d_dec_copyright_ext(dec_state_t * ps_dec)592 void impeg2d_dec_copyright_ext(dec_state_t *ps_dec)
593 {
594 UWORD32 u4_bits_to_flush;
595
596 u4_bits_to_flush = COPYRIGHT_EXTENSION_LEN;
597
598 while(u4_bits_to_flush >= 32 )
599 {
600 impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,32);
601 u4_bits_to_flush = u4_bits_to_flush - 32;
602 }
603
604 if(u4_bits_to_flush > 0)
605 {
606 impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,u4_bits_to_flush);
607 }
608
609
610 impeg2d_next_start_code(ps_dec);
611 }
612 /*******************************************************************************
613 * Function Name : impeg2d_dec_cam_param_ext
614 *
615 * Description : This function is eqvt to camera_parameters_extension() of
616 * standard. The parameters are not used by decoder
617 *
618 * Arguments : Decoder context
619 *
620 * Values Returned : None
621 *******************************************************************************/
622
623
impeg2d_dec_cam_param_ext(dec_state_t * ps_dec)624 void impeg2d_dec_cam_param_ext(dec_state_t *ps_dec)
625 {
626
627 UWORD32 u4_bits_to_flush;
628
629 u4_bits_to_flush = CAMERA_PARAMETER_EXTENSION_LEN;
630
631 while(u4_bits_to_flush >= 32 )
632 {
633 impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,32);
634 u4_bits_to_flush = u4_bits_to_flush - 32;
635 }
636
637 if(u4_bits_to_flush > 0)
638 {
639 impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,u4_bits_to_flush);
640 }
641
642 impeg2d_next_start_code(ps_dec);
643 }
644
645 /*******************************************************************************
646 *
647 * Function Name : impeg2d_dec_grp_of_pic_hdr
648 *
649 * Description : Gets information at the GOP level.
650 *
651 * Arguments : Decoder context
652 *
653 * Values Returned : None
654 *******************************************************************************/
655
656
impeg2d_dec_grp_of_pic_hdr(dec_state_t * ps_dec)657 void impeg2d_dec_grp_of_pic_hdr(dec_state_t *ps_dec)
658 {
659
660 UWORD32 u4_bits_to_flush;
661
662 u4_bits_to_flush = GROUP_OF_PICTURE_LEN;
663
664 while(u4_bits_to_flush >= 32 )
665 {
666 impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,32);
667 u4_bits_to_flush = u4_bits_to_flush - 32;
668 }
669
670 if(u4_bits_to_flush > 0)
671 {
672 impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,u4_bits_to_flush);
673 }
674
675 }
676
677
678 /*******************************************************************************
679 *
680 * Function Name : impeg2d_dec_pic_hdr
681 *
682 * Description : Gets the picture header information.
683 *
684 * Arguments : Decoder context
685 *
686 * Values Returned : None
687 *******************************************************************************/
impeg2d_dec_pic_hdr(dec_state_t * ps_dec)688 IMPEG2D_ERROR_CODES_T impeg2d_dec_pic_hdr(dec_state_t *ps_dec)
689 {
690 stream_t *ps_stream;
691 ps_stream = &ps_dec->s_bit_stream;
692
693 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
694 /* Flush temporal reference */
695 impeg2d_bit_stream_get(ps_stream,10);
696
697 /* Picture type */
698 ps_dec->e_pic_type = (e_pic_type_t)impeg2d_bit_stream_get(ps_stream,3);
699 if((ps_dec->e_pic_type < I_PIC) || (ps_dec->e_pic_type > D_PIC))
700 {
701 impeg2d_next_code(ps_dec, PICTURE_START_CODE);
702 return IMPEG2D_INVALID_PIC_TYPE;
703 }
704
705 /* Flush vbv_delay */
706 impeg2d_bit_stream_get(ps_stream,16);
707
708 if(ps_dec->e_pic_type == P_PIC || ps_dec->e_pic_type == B_PIC)
709 {
710 ps_dec->u2_full_pel_forw_vector = impeg2d_bit_stream_get_bit(ps_stream);
711 ps_dec->u2_forw_f_code = impeg2d_bit_stream_get(ps_stream,3);
712 }
713 if(ps_dec->e_pic_type == B_PIC)
714 {
715 ps_dec->u2_full_pel_back_vector = impeg2d_bit_stream_get_bit(ps_stream);
716 ps_dec->u2_back_f_code = impeg2d_bit_stream_get(ps_stream,3);
717 }
718
719 if(ps_dec->u2_is_mpeg2 == 0)
720 {
721 if (ps_dec->u2_forw_f_code < 1 || ps_dec->u2_forw_f_code > 7 ||
722 ps_dec->u2_back_f_code < 1 || ps_dec->u2_back_f_code > 7)
723 {
724 return IMPEG2D_UNKNOWN_ERROR;
725 }
726 ps_dec->au2_f_code[0][0] = ps_dec->au2_f_code[0][1] = ps_dec->u2_forw_f_code;
727 ps_dec->au2_f_code[1][0] = ps_dec->au2_f_code[1][1] = ps_dec->u2_back_f_code;
728 }
729
730 /*-----------------------------------------------------------------------*/
731 /* Flush the extra bit value */
732 /* */
733 /* while(impeg2d_bit_stream_nxt() == '1') */
734 /* { */
735 /* extra_bit_picture 1 */
736 /* extra_information_picture 8 */
737 /* } */
738 /* extra_bit_picture 1 */
739 /*-----------------------------------------------------------------------*/
740 while (impeg2d_bit_stream_nxt(ps_stream,1) == 1 &&
741 ps_stream->u4_offset < ps_stream->u4_max_offset)
742 {
743 impeg2d_bit_stream_get(ps_stream,9);
744 }
745 impeg2d_bit_stream_get_bit(ps_stream);
746 impeg2d_next_start_code(ps_dec);
747
748 return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
749 }
750
751
752 /*******************************************************************************
753 *
754 * Function Name : impeg2d_dec_pic_coding_ext
755 *
756 * Description : Reads more picture level parameters
757 *
758 * Arguments :
759 * dec : Decoder context
760 *
761 * Values Returned : Error
762 *******************************************************************************/
impeg2d_dec_pic_coding_ext(dec_state_t * ps_dec)763 IMPEG2D_ERROR_CODES_T impeg2d_dec_pic_coding_ext(dec_state_t *ps_dec)
764 {
765 stream_t *ps_stream;
766 IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T) IV_SUCCESS;
767
768 ps_stream = &ps_dec->s_bit_stream;
769 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
770 /* extension code identifier */
771 impeg2d_bit_stream_get(ps_stream,4);
772
773 ps_dec->au2_f_code[0][0] = impeg2d_bit_stream_get(ps_stream,4);
774 ps_dec->au2_f_code[0][1] = impeg2d_bit_stream_get(ps_stream,4);
775 ps_dec->au2_f_code[1][0] = impeg2d_bit_stream_get(ps_stream,4);
776 ps_dec->au2_f_code[1][1] = impeg2d_bit_stream_get(ps_stream,4);
777 ps_dec->u2_intra_dc_precision = impeg2d_bit_stream_get(ps_stream,2);
778 ps_dec->u2_picture_structure = impeg2d_bit_stream_get(ps_stream,2);
779 if (ps_dec->u2_picture_structure < TOP_FIELD ||
780 ps_dec->u2_picture_structure > FRAME_PICTURE)
781 {
782 return IMPEG2D_FRM_HDR_DECODE_ERR;
783 }
784 ps_dec->u2_top_field_first = impeg2d_bit_stream_get_bit(ps_stream);
785 ps_dec->u2_frame_pred_frame_dct = impeg2d_bit_stream_get_bit(ps_stream);
786 ps_dec->u2_concealment_motion_vectors = impeg2d_bit_stream_get_bit(ps_stream);
787 ps_dec->u2_q_scale_type = impeg2d_bit_stream_get_bit(ps_stream);
788 ps_dec->u2_intra_vlc_format = impeg2d_bit_stream_get_bit(ps_stream);
789 ps_dec->u2_alternate_scan = impeg2d_bit_stream_get_bit(ps_stream);
790 ps_dec->u2_repeat_first_field = impeg2d_bit_stream_get_bit(ps_stream);
791 /* Flush chroma_420_type */
792 impeg2d_bit_stream_get_bit(ps_stream);
793
794 ps_dec->u2_progressive_frame = impeg2d_bit_stream_get_bit(ps_stream);
795 if (impeg2d_bit_stream_get_bit(ps_stream))
796 {
797 /* Flush v_axis, field_sequence, burst_amplitude, sub_carrier_phase */
798 impeg2d_bit_stream_flush(ps_stream,20);
799 }
800 impeg2d_next_start_code(ps_dec);
801
802
803 if(VERTICAL_SCAN == ps_dec->u2_alternate_scan)
804 {
805 ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_vertical;
806 }
807 else
808 {
809 ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_zig_zag;
810 }
811 return e_error;
812 }
813
814 /*******************************************************************************
815 *
816 * Function Name : impeg2d_dec_slice
817 *
818 * Description : Reads Slice level parameters and calls functions that
819 * decode individual MBs of slice
820 *
821 * Arguments :
822 * dec : Decoder context
823 *
824 * Values Returned : None
825 *******************************************************************************/
impeg2d_dec_slice(dec_state_t * ps_dec)826 IMPEG2D_ERROR_CODES_T impeg2d_dec_slice(dec_state_t *ps_dec)
827 {
828 stream_t *ps_stream;
829 UWORD32 u4_slice_vertical_position;
830 UWORD32 u4_slice_vertical_position_extension;
831 IMPEG2D_ERROR_CODES_T e_error;
832
833 ps_stream = &ps_dec->s_bit_stream;
834
835 /*------------------------------------------------------------------------*/
836 /* All the profiles supported require restricted slice structure. Hence */
837 /* there is no need to store slice_vertical_position. Note that max */
838 /* height supported does not exceed 2800 and scalablity is not supported */
839 /*------------------------------------------------------------------------*/
840
841 /* Remove the slice start code */
842 impeg2d_bit_stream_flush(ps_stream,START_CODE_PREFIX_LEN);
843 u4_slice_vertical_position = impeg2d_bit_stream_get(ps_stream, 8);
844 if(u4_slice_vertical_position > 2800)
845 {
846 u4_slice_vertical_position_extension = impeg2d_bit_stream_get(ps_stream, 3);
847 u4_slice_vertical_position += (u4_slice_vertical_position_extension << 7);
848 }
849
850 if((u4_slice_vertical_position > ps_dec->u2_num_vert_mb) ||
851 (u4_slice_vertical_position == 0))
852 {
853 return IMPEG2D_INVALID_VERT_SIZE;
854 }
855
856 // change the mb_y to point to slice_vertical_position
857 u4_slice_vertical_position--;
858 if (ps_dec->u2_mb_y != u4_slice_vertical_position)
859 {
860 ps_dec->u2_mb_y = u4_slice_vertical_position;
861 ps_dec->u2_mb_x = 0;
862
863 /* Update the number of MBs left, since we have probably missed a slice
864 * (that's why we see a mismatch between u2_mb_y and current position).
865 */
866 ps_dec->u2_num_mbs_left = (ps_dec->u2_num_vert_mb - ps_dec->u2_mb_y)
867 * ps_dec->u2_num_horiz_mb;
868 }
869 ps_dec->u2_first_mb = 1;
870
871 /*------------------------------------------------------------------------*/
872 /* Quant scale code decoding */
873 /*------------------------------------------------------------------------*/
874 {
875 UWORD16 u2_quant_scale_code;
876 u2_quant_scale_code = impeg2d_bit_stream_get(ps_stream,5);
877 ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
878 gau1_impeg2_non_linear_quant_scale[u2_quant_scale_code] : (u2_quant_scale_code << 1);
879 }
880
881 if (impeg2d_bit_stream_nxt(ps_stream,1) == 1)
882 {
883 impeg2d_bit_stream_flush(ps_stream,9);
884 /* Flush extra bit information */
885 while (impeg2d_bit_stream_nxt(ps_stream,1) == 1 &&
886 ps_stream->u4_offset < ps_stream->u4_max_offset)
887 {
888 impeg2d_bit_stream_flush(ps_stream,9);
889 }
890 }
891 impeg2d_bit_stream_get_bit(ps_stream);
892
893 /* Reset the DC predictors to reset values given in Table 7.2 at the start*/
894 /* of slice data */
895 ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision;
896 ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
897 ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
898 /*------------------------------------------------------------------------*/
899 /* dec->DecMBsinSlice() implements the following psuedo code from standard*/
900 /* do */
901 /* { */
902 /* macroblock() */
903 /* } while (impeg2d_bit_stream_nxt() != '000 0000 0000 0000 0000 0000') */
904 /*------------------------------------------------------------------------*/
905
906 e_error = ps_dec->pf_decode_slice(ps_dec);
907 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
908 {
909 return e_error;
910 }
911
912 /* Check for the MBy index instead of number of MBs left, because the
913 * number of MBs left in case of multi-thread decode is the number of MBs
914 * in that row only
915 */
916 if(ps_dec->u2_mb_y < ps_dec->u2_num_vert_mb)
917 impeg2d_next_start_code(ps_dec);
918
919 return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
920 }
921
impeg2d_dec_pic_data_thread(dec_state_t * ps_dec)922 void impeg2d_dec_pic_data_thread(dec_state_t *ps_dec)
923 {
924 WORD32 i4_continue_decode;
925
926 WORD32 i4_cur_row, temp;
927 UWORD32 u4_bits_read;
928 WORD32 i4_dequeue_job;
929 IMPEG2D_ERROR_CODES_T e_error;
930
931 i4_cur_row = ps_dec->u2_mb_y + 1;
932
933 i4_continue_decode = 1;
934
935 i4_dequeue_job = 1;
936 do
937 {
938 if(i4_cur_row > ps_dec->u2_num_vert_mb)
939 {
940 i4_continue_decode = 0;
941 break;
942 }
943
944 {
945 if((ps_dec->i4_num_cores> 1) && (i4_dequeue_job))
946 {
947 job_t s_job;
948 IV_API_CALL_STATUS_T e_ret;
949 UWORD8 *pu1_buf;
950
951 e_ret = impeg2_jobq_dequeue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 1);
952 if(e_ret != IV_SUCCESS)
953 break;
954
955 if(CMD_PROCESS == s_job.i4_cmd)
956 {
957 pu1_buf = ps_dec->pu1_inp_bits_buf + s_job.i4_bistream_ofst;
958 impeg2d_bit_stream_init(&(ps_dec->s_bit_stream), pu1_buf,
959 (ps_dec->u4_num_inp_bytes - s_job.i4_bistream_ofst));
960 i4_cur_row = s_job.i2_start_mb_y;
961 ps_dec->i4_start_mb_y = s_job.i2_start_mb_y;
962 ps_dec->i4_end_mb_y = s_job.i2_end_mb_y;
963 ps_dec->u2_mb_x = 0;
964 ps_dec->u2_mb_y = ps_dec->i4_start_mb_y;
965 ps_dec->u2_num_mbs_left = (ps_dec->i4_end_mb_y - ps_dec->i4_start_mb_y) * ps_dec->u2_num_horiz_mb;
966
967 }
968 else
969 {
970 WORD32 start_row;
971 WORD32 num_rows;
972 start_row = s_job.i2_start_mb_y << 4;
973 num_rows = MIN((s_job.i2_end_mb_y << 4), ps_dec->u2_vertical_size);
974 num_rows -= start_row;
975
976 if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame))
977 {
978 impeg2d_deinterlace(ps_dec,
979 ps_dec->ps_disp_pic,
980 ps_dec->ps_disp_frm_buf,
981 start_row,
982 num_rows);
983
984 }
985 else
986 {
987 impeg2d_format_convert(ps_dec, ps_dec->ps_disp_pic,
988 ps_dec->ps_disp_frm_buf,
989 start_row, num_rows);
990 }
991 break;
992
993 }
994
995 }
996 e_error = impeg2d_dec_slice(ps_dec);
997
998 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
999 {
1000 impeg2d_next_start_code(ps_dec);
1001 if(ps_dec->s_bit_stream.u4_offset >= ps_dec->s_bit_stream.u4_max_offset)
1002 {
1003 ps_dec->u4_error_code = IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1004 return;
1005 }
1006 }
1007 }
1008
1009 /* Detecting next slice start code */
1010 while(1)
1011 {
1012 // skip (dec->u4_num_cores-1) rows
1013 u4_bits_read = impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,START_CODE_LEN);
1014 temp = u4_bits_read & 0xFF;
1015 i4_continue_decode = (((u4_bits_read >> 8) == 0x01) && (temp) && (temp <= 0xAF));
1016
1017 if (1 == ps_dec->i4_num_cores && 0 == ps_dec->u2_num_mbs_left)
1018 {
1019 i4_continue_decode = 0;
1020 #ifdef __ANDROID__
1021 android_errorWriteLog(0x534e4554, "26070014");
1022 #endif
1023 }
1024
1025 if(i4_continue_decode)
1026 {
1027 if (0 != ps_dec->u2_num_mbs_left)
1028 {
1029 /* If the slice is from the same row, then continue decoding without dequeue */
1030 if((temp - 1) == i4_cur_row)
1031 {
1032 i4_dequeue_job = 0;
1033 }
1034 else
1035 {
1036 if(temp < ps_dec->i4_end_mb_y)
1037 {
1038 i4_cur_row = ps_dec->u2_mb_y;
1039 }
1040 else
1041 {
1042 i4_dequeue_job = 1;
1043 }
1044 }
1045 }
1046 else
1047 {
1048 i4_dequeue_job = 1;
1049 }
1050 break;
1051 }
1052 else
1053 break;
1054 }
1055
1056 }while(i4_continue_decode);
1057 if(ps_dec->i4_num_cores > 1)
1058 {
1059 while(1)
1060 {
1061 job_t s_job;
1062 IV_API_CALL_STATUS_T e_ret;
1063
1064 e_ret = impeg2_jobq_dequeue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 1);
1065 if(e_ret != IV_SUCCESS)
1066 break;
1067 if(CMD_FMTCONV == s_job.i4_cmd)
1068 {
1069 WORD32 start_row;
1070 WORD32 num_rows;
1071 start_row = s_job.i2_start_mb_y << 4;
1072 num_rows = MIN((s_job.i2_end_mb_y << 4), ps_dec->u2_vertical_size);
1073 num_rows -= start_row;
1074 if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame))
1075 {
1076 impeg2d_deinterlace(ps_dec,
1077 ps_dec->ps_disp_pic,
1078 ps_dec->ps_disp_frm_buf,
1079 start_row,
1080 num_rows);
1081
1082 }
1083 else
1084 {
1085 impeg2d_format_convert(ps_dec,
1086 ps_dec->ps_disp_pic,
1087 ps_dec->ps_disp_frm_buf,
1088 start_row,
1089 num_rows);
1090 }
1091 }
1092 }
1093 }
1094 else
1095 {
1096 if((NULL != ps_dec->ps_disp_pic) && ((0 == ps_dec->u4_share_disp_buf) || (IV_YUV_420P != ps_dec->i4_chromaFormat)))
1097 {
1098 if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame))
1099 {
1100 impeg2d_deinterlace(ps_dec,
1101 ps_dec->ps_disp_pic,
1102 ps_dec->ps_disp_frm_buf,
1103 0,
1104 ps_dec->u2_vertical_size);
1105
1106 }
1107 else
1108 {
1109 impeg2d_format_convert(ps_dec, ps_dec->ps_disp_pic,
1110 ps_dec->ps_disp_frm_buf,
1111 0, ps_dec->u2_vertical_size);
1112 }
1113 }
1114 }
1115 }
1116
impeg2d_init_thread_dec_ctxt(dec_state_t * ps_dec,dec_state_t * ps_dec_thd,WORD32 i4_min_mb_y)1117 static WORD32 impeg2d_init_thread_dec_ctxt(dec_state_t *ps_dec,
1118 dec_state_t *ps_dec_thd,
1119 WORD32 i4_min_mb_y)
1120 {
1121 UNUSED(i4_min_mb_y);
1122 ps_dec_thd->i4_start_mb_y = 0;
1123 ps_dec_thd->i4_end_mb_y = ps_dec->u2_num_vert_mb;
1124 ps_dec_thd->u2_mb_x = 0;
1125 ps_dec_thd->u2_mb_y = 0;
1126 ps_dec_thd->u2_is_mpeg2 = ps_dec->u2_is_mpeg2;
1127 ps_dec_thd->i4_pic_count = ps_dec->i4_pic_count;
1128 ps_dec_thd->u2_frame_width = ps_dec->u2_frame_width;
1129 ps_dec_thd->u2_frame_height = ps_dec->u2_frame_height;
1130 ps_dec_thd->u2_picture_width = ps_dec->u2_picture_width;
1131 ps_dec_thd->u2_horizontal_size = ps_dec->u2_horizontal_size;
1132 ps_dec_thd->u2_vertical_size = ps_dec->u2_vertical_size;
1133 ps_dec_thd->u2_create_max_width = ps_dec->u2_create_max_width;
1134 ps_dec_thd->u2_create_max_height = ps_dec->u2_create_max_height;
1135 ps_dec_thd->u2_header_done = ps_dec->u2_header_done;
1136 ps_dec_thd->u2_decode_header = ps_dec->u2_decode_header;
1137
1138 ps_dec_thd->u2_num_horiz_mb = ps_dec->u2_num_horiz_mb;
1139 ps_dec_thd->u2_num_vert_mb = ps_dec->u2_num_vert_mb;
1140 ps_dec_thd->u2_num_flds_decoded = ps_dec->u2_num_flds_decoded;
1141
1142 ps_dec_thd->u4_frm_buf_stride = ps_dec->u4_frm_buf_stride;
1143
1144 ps_dec_thd->u2_field_dct = ps_dec->u2_field_dct;
1145 ps_dec_thd->u2_read_dct_type = ps_dec->u2_read_dct_type;
1146
1147 ps_dec_thd->u2_read_motion_type = ps_dec->u2_read_motion_type;
1148 ps_dec_thd->u2_motion_type = ps_dec->u2_motion_type;
1149
1150 ps_dec_thd->pu2_mb_type = ps_dec->pu2_mb_type;
1151 ps_dec_thd->u2_fld_pic = ps_dec->u2_fld_pic;
1152 ps_dec_thd->u2_frm_pic = ps_dec->u2_frm_pic;
1153
1154 ps_dec_thd->u2_fld_parity = ps_dec->u2_fld_parity;
1155
1156 ps_dec_thd->au2_fcode_data[0] = ps_dec->au2_fcode_data[0];
1157 ps_dec_thd->au2_fcode_data[1] = ps_dec->au2_fcode_data[1];
1158
1159 ps_dec_thd->u1_quant_scale = ps_dec->u1_quant_scale;
1160
1161 ps_dec_thd->u2_num_mbs_left = ps_dec->u2_num_mbs_left;
1162 ps_dec_thd->u2_first_mb = ps_dec->u2_first_mb;
1163 ps_dec_thd->u2_num_skipped_mbs = ps_dec->u2_num_skipped_mbs;
1164
1165 memcpy(&ps_dec_thd->s_cur_frm_buf, &ps_dec->s_cur_frm_buf, sizeof(yuv_buf_t));
1166 memcpy(&ps_dec_thd->as_recent_fld[0][0], &ps_dec->as_recent_fld[0][0], sizeof(yuv_buf_t));
1167 memcpy(&ps_dec_thd->as_recent_fld[0][1], &ps_dec->as_recent_fld[0][1], sizeof(yuv_buf_t));
1168 memcpy(&ps_dec_thd->as_recent_fld[1][0], &ps_dec->as_recent_fld[1][0], sizeof(yuv_buf_t));
1169 memcpy(&ps_dec_thd->as_recent_fld[1][1], &ps_dec->as_recent_fld[1][1], sizeof(yuv_buf_t));
1170 memcpy(&ps_dec_thd->as_ref_buf, &ps_dec->as_ref_buf, sizeof(yuv_buf_t) * 2 * 2);
1171
1172
1173 ps_dec_thd->pf_decode_slice = ps_dec->pf_decode_slice;
1174
1175 ps_dec_thd->pf_vld_inv_quant = ps_dec->pf_vld_inv_quant;
1176
1177 memcpy(ps_dec_thd->pf_idct_recon, ps_dec->pf_idct_recon, sizeof(ps_dec->pf_idct_recon));
1178
1179 memcpy(ps_dec_thd->pf_mc, ps_dec->pf_mc, sizeof(ps_dec->pf_mc));
1180 ps_dec_thd->pf_interpolate = ps_dec->pf_interpolate;
1181 ps_dec_thd->pf_copy_mb = ps_dec->pf_copy_mb;
1182 ps_dec_thd->pf_fullx_halfy_8x8 = ps_dec->pf_fullx_halfy_8x8;
1183 ps_dec_thd->pf_halfx_fully_8x8 = ps_dec->pf_halfx_fully_8x8;
1184 ps_dec_thd->pf_halfx_halfy_8x8 = ps_dec->pf_halfx_halfy_8x8;
1185 ps_dec_thd->pf_fullx_fully_8x8 = ps_dec->pf_fullx_fully_8x8;
1186
1187 ps_dec_thd->pf_memset_8bit_8x8_block = ps_dec->pf_memset_8bit_8x8_block;
1188 ps_dec_thd->pf_memset_16bit_8x8_linear_block = ps_dec->pf_memset_16bit_8x8_linear_block;
1189 ps_dec_thd->pf_copy_yuv420p_buf = ps_dec->pf_copy_yuv420p_buf;
1190 ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv422ile = ps_dec->pf_fmt_conv_yuv420p_to_yuv422ile;
1191 ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv420sp_uv = ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_uv;
1192 ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv420sp_vu = ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_vu;
1193
1194
1195 memcpy(ps_dec_thd->au1_intra_quant_matrix, ps_dec->au1_intra_quant_matrix, NUM_PELS_IN_BLOCK * sizeof(UWORD8));
1196 memcpy(ps_dec_thd->au1_inter_quant_matrix, ps_dec->au1_inter_quant_matrix, NUM_PELS_IN_BLOCK * sizeof(UWORD8));
1197 ps_dec_thd->pu1_inv_scan_matrix = ps_dec->pu1_inv_scan_matrix;
1198
1199
1200 ps_dec_thd->u2_progressive_sequence = ps_dec->u2_progressive_sequence;
1201 ps_dec_thd->e_pic_type = ps_dec->e_pic_type;
1202 ps_dec_thd->u2_full_pel_forw_vector = ps_dec->u2_full_pel_forw_vector;
1203 ps_dec_thd->u2_forw_f_code = ps_dec->u2_forw_f_code;
1204 ps_dec_thd->u2_full_pel_back_vector = ps_dec->u2_full_pel_back_vector;
1205 ps_dec_thd->u2_back_f_code = ps_dec->u2_back_f_code;
1206
1207 memcpy(ps_dec_thd->ai2_mv, ps_dec->ai2_mv, (2*2*2)*sizeof(WORD16));
1208 memcpy(ps_dec_thd->au2_f_code, ps_dec->au2_f_code, (2*2)*sizeof(UWORD16));
1209 ps_dec_thd->u2_intra_dc_precision = ps_dec->u2_intra_dc_precision;
1210 ps_dec_thd->u2_picture_structure = ps_dec->u2_picture_structure;
1211 ps_dec_thd->u2_top_field_first = ps_dec->u2_top_field_first;
1212 ps_dec_thd->u2_frame_pred_frame_dct = ps_dec->u2_frame_pred_frame_dct;
1213 ps_dec_thd->u2_concealment_motion_vectors = ps_dec->u2_concealment_motion_vectors;
1214 ps_dec_thd->u2_q_scale_type = ps_dec->u2_q_scale_type;
1215 ps_dec_thd->u2_intra_vlc_format = ps_dec->u2_intra_vlc_format;
1216 ps_dec_thd->u2_alternate_scan = ps_dec->u2_alternate_scan;
1217 ps_dec_thd->u2_repeat_first_field = ps_dec->u2_repeat_first_field;
1218 ps_dec_thd->u2_progressive_frame = ps_dec->u2_progressive_frame;
1219 ps_dec_thd->pu1_inp_bits_buf = ps_dec->pu1_inp_bits_buf;
1220 ps_dec_thd->u4_num_inp_bytes = ps_dec->u4_num_inp_bytes;
1221 ps_dec_thd->pv_jobq = ps_dec->pv_jobq;
1222 ps_dec_thd->pv_jobq_buf = ps_dec->pv_jobq_buf;
1223 ps_dec_thd->i4_jobq_buf_size = ps_dec->i4_jobq_buf_size;
1224
1225
1226 ps_dec_thd->u2_frame_rate_code = ps_dec->u2_frame_rate_code;
1227 ps_dec_thd->u2_frame_rate_extension_n = ps_dec->u2_frame_rate_extension_n;
1228 ps_dec_thd->u2_frame_rate_extension_d = ps_dec->u2_frame_rate_extension_d;
1229 ps_dec_thd->u2_framePeriod = ps_dec->u2_framePeriod;
1230 ps_dec_thd->u2_display_horizontal_size = ps_dec->u2_display_horizontal_size;
1231 ps_dec_thd->u2_display_vertical_size = ps_dec->u2_display_vertical_size;
1232 ps_dec_thd->u2_aspect_ratio_info = ps_dec->u2_aspect_ratio_info;
1233
1234 ps_dec_thd->ps_func_bi_direct = ps_dec->ps_func_bi_direct;
1235 ps_dec_thd->ps_func_forw_or_back = ps_dec->ps_func_forw_or_back;
1236 ps_dec_thd->pv_deinterlacer_ctxt = ps_dec->pv_deinterlacer_ctxt;
1237 ps_dec_thd->ps_deint_pic = ps_dec->ps_deint_pic;
1238
1239 return 0;
1240 }
1241
1242
impeg2d_get_slice_pos(dec_state_multi_core_t * ps_dec_state_multi_core)1243 WORD32 impeg2d_get_slice_pos(dec_state_multi_core_t *ps_dec_state_multi_core)
1244 {
1245 WORD32 u4_bits;
1246 WORD32 i4_row;
1247
1248
1249 dec_state_t *ps_dec = ps_dec_state_multi_core->ps_dec_state[0];
1250 WORD32 i4_prev_row;
1251 stream_t s_bitstrm;
1252 WORD32 i4_start_row;
1253 WORD32 i4_slice_bistream_ofst;
1254 WORD32 i;
1255 s_bitstrm = ps_dec->s_bit_stream;
1256 i4_prev_row = -1;
1257
1258 ps_dec_state_multi_core->ps_dec_state[0]->i4_start_mb_y = 0;
1259 ps_dec_state_multi_core->ps_dec_state[1]->i4_start_mb_y = -1;
1260 ps_dec_state_multi_core->ps_dec_state[2]->i4_start_mb_y = -1;
1261 ps_dec_state_multi_core->ps_dec_state[3]->i4_start_mb_y = -1;
1262
1263 ps_dec_state_multi_core->ps_dec_state[0]->i4_end_mb_y = ps_dec->u2_num_vert_mb;
1264 ps_dec_state_multi_core->ps_dec_state[1]->i4_end_mb_y = -1;
1265 ps_dec_state_multi_core->ps_dec_state[2]->i4_end_mb_y = -1;
1266 ps_dec_state_multi_core->ps_dec_state[3]->i4_end_mb_y = -1;
1267
1268 if(ps_dec->i4_num_cores == 1)
1269 return 0;
1270 /* Reset the jobq to start of the jobq buffer */
1271 impeg2_jobq_reset((jobq_t *)ps_dec->pv_jobq);
1272
1273 i4_start_row = -1;
1274 i4_slice_bistream_ofst = 0;
1275 while(1)
1276 {
1277 WORD32 i4_is_slice;
1278
1279 if(s_bitstrm.u4_offset + START_CODE_LEN >= s_bitstrm.u4_max_offset)
1280 {
1281 break;
1282 }
1283 u4_bits = impeg2d_bit_stream_nxt(&s_bitstrm,START_CODE_LEN);
1284
1285 i4_row = u4_bits & 0xFF;
1286
1287 /* Detect end of frame */
1288 i4_is_slice = (((u4_bits >> 8) == 0x01) && (i4_row) && (i4_row <= ps_dec->u2_num_vert_mb));
1289 if(!i4_is_slice)
1290 break;
1291
1292 i4_row -= 1;
1293
1294
1295 if(i4_prev_row < i4_row)
1296 {
1297 /* Create a job for previous slice row */
1298 if(i4_start_row != -1)
1299 {
1300 job_t s_job;
1301 IV_API_CALL_STATUS_T ret;
1302 s_job.i2_start_mb_y = i4_start_row;
1303 s_job.i2_end_mb_y = i4_row;
1304 s_job.i4_cmd = CMD_PROCESS;
1305 s_job.i4_bistream_ofst = i4_slice_bistream_ofst;
1306 ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0);
1307 if(ret != IV_SUCCESS)
1308 return ret;
1309
1310 }
1311 /* Store current slice's bitstream offset */
1312 i4_slice_bistream_ofst = s_bitstrm.u4_offset >> 3;
1313 i4_slice_bistream_ofst -= (size_t)s_bitstrm.pv_bs_buf & 3;
1314 i4_prev_row = i4_row;
1315
1316 /* Store current slice's row position */
1317 i4_start_row = i4_row;
1318
1319 }
1320 #ifdef __ANDROID__
1321 else if (i4_prev_row > i4_row)
1322 {
1323 android_errorWriteLog(0x534e4554, "26070014");
1324 }
1325 #endif
1326
1327 impeg2d_bit_stream_flush(&s_bitstrm, START_CODE_LEN);
1328
1329 // flush bytes till next start code
1330 /* Flush the bytes till a start code is encountered */
1331 while(impeg2d_bit_stream_nxt(&s_bitstrm, 24) != START_CODE_PREFIX)
1332 {
1333 impeg2d_bit_stream_get(&s_bitstrm, 8);
1334
1335 if(s_bitstrm.u4_offset >= s_bitstrm.u4_max_offset)
1336 {
1337 break;
1338 }
1339 }
1340 }
1341
1342 /* Create job for the last slice row */
1343 {
1344 job_t s_job;
1345 IV_API_CALL_STATUS_T e_ret;
1346 s_job.i2_start_mb_y = i4_start_row;
1347 s_job.i2_end_mb_y = ps_dec->u2_num_vert_mb;
1348 s_job.i4_cmd = CMD_PROCESS;
1349 s_job.i4_bistream_ofst = i4_slice_bistream_ofst;
1350 e_ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0);
1351 if(e_ret != IV_SUCCESS)
1352 return e_ret;
1353
1354 }
1355 if((NULL != ps_dec->ps_disp_pic) && ((0 == ps_dec->u4_share_disp_buf) || (IV_YUV_420P != ps_dec->i4_chromaFormat)))
1356 {
1357 for(i = 0; i < ps_dec->u2_vertical_size; i+=64)
1358 {
1359 job_t s_job;
1360 IV_API_CALL_STATUS_T ret;
1361 s_job.i2_start_mb_y = i;
1362 s_job.i2_start_mb_y >>= 4;
1363 s_job.i2_end_mb_y = (i + 64);
1364 s_job.i2_end_mb_y >>= 4;
1365 s_job.i4_cmd = CMD_FMTCONV;
1366 s_job.i4_bistream_ofst = 0;
1367 ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0);
1368 if(ret != IV_SUCCESS)
1369 return ret;
1370
1371 }
1372 }
1373
1374 impeg2_jobq_terminate(ps_dec->pv_jobq);
1375 ps_dec->i4_bytes_consumed = s_bitstrm.u4_offset >> 3;
1376 ps_dec->i4_bytes_consumed -= ((size_t)s_bitstrm.pv_bs_buf & 3);
1377
1378 return 0;
1379 }
1380
1381 /*******************************************************************************
1382 *
1383 * Function Name : impeg2d_dec_pic_data
1384 *
1385 * Description : It intializes several parameters and decodes a Picture
1386 * till any slice is left.
1387 *
1388 * Arguments :
1389 * dec : Decoder context
1390 *
1391 * Values Returned : None
1392 *******************************************************************************/
1393
impeg2d_dec_pic_data(dec_state_t * ps_dec)1394 void impeg2d_dec_pic_data(dec_state_t *ps_dec)
1395 {
1396
1397 WORD32 i;
1398 dec_state_multi_core_t *ps_dec_state_multi_core;
1399
1400 dec_state_t *ps_dec_thd;
1401 WORD32 i4_status;
1402 WORD32 i4_min_mb_y;
1403
1404
1405 /* Resetting the MB address and MB coordinates at the start of the Frame */
1406 ps_dec->u2_mb_x = ps_dec->u2_mb_y = 0;
1407
1408 ps_dec_state_multi_core = ps_dec->ps_dec_state_multi_core;
1409 impeg2d_get_slice_pos(ps_dec_state_multi_core);
1410
1411 i4_min_mb_y = 1;
1412 for(i=0; i < ps_dec->i4_num_cores - 1; i++)
1413 {
1414 // initialize decoder context for thread
1415 // launch dec->u4_num_cores-1 threads
1416
1417 ps_dec_thd = ps_dec_state_multi_core->ps_dec_state[i+1];
1418
1419 ps_dec_thd->ps_disp_pic = ps_dec->ps_disp_pic;
1420 ps_dec_thd->ps_disp_frm_buf = ps_dec->ps_disp_frm_buf;
1421
1422 i4_status = impeg2d_init_thread_dec_ctxt(ps_dec, ps_dec_thd, i4_min_mb_y);
1423 //impeg2d_dec_pic_data_thread(ps_dec_thd);
1424
1425 if(i4_status == 0)
1426 {
1427 ithread_create(ps_dec_thd->pv_codec_thread_handle, NULL, (void *)impeg2d_dec_pic_data_thread, ps_dec_thd);
1428 ps_dec_state_multi_core->au4_thread_launched[i + 1] = 1;
1429 i4_min_mb_y = ps_dec_thd->u2_mb_y + 1;
1430 }
1431 else
1432 {
1433 ps_dec_state_multi_core->au4_thread_launched[i + 1] = 0;
1434 break;
1435 }
1436 }
1437
1438 impeg2d_dec_pic_data_thread(ps_dec);
1439
1440 // wait for threads to complete
1441 for(i=0; i < (ps_dec->i4_num_cores - 1); i++)
1442 {
1443 if(ps_dec_state_multi_core->au4_thread_launched[i + 1] == 1)
1444 {
1445 ps_dec_thd = ps_dec_state_multi_core->ps_dec_state[i+1];
1446 ithread_join(ps_dec_thd->pv_codec_thread_handle, NULL);
1447 }
1448 }
1449
1450 }
1451 /*******************************************************************************
1452 *
1453 * Function Name : impeg2d_flush_ext_and_user_data
1454 *
1455 * Description : Flushes the extension and user data present in the
1456 * stream_t
1457 *
1458 * Arguments :
1459 * dec : Decoder context
1460 *
1461 * Values Returned : None
1462 *******************************************************************************/
impeg2d_flush_ext_and_user_data(dec_state_t * ps_dec)1463 void impeg2d_flush_ext_and_user_data(dec_state_t *ps_dec)
1464 {
1465 UWORD32 u4_start_code;
1466 stream_t *ps_stream;
1467
1468 ps_stream = &ps_dec->s_bit_stream;
1469 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1470
1471 while((u4_start_code == EXTENSION_START_CODE || u4_start_code == USER_DATA_START_CODE) &&
1472 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1473 {
1474 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
1475 while(impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX &&
1476 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1477 {
1478 impeg2d_bit_stream_flush(ps_stream,8);
1479 }
1480 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1481 }
1482 }
1483 /*******************************************************************************
1484 *
1485 * Function Name : impeg2d_dec_user_data
1486 *
1487 * Description : Flushes the user data present in the stream_t
1488 *
1489 * Arguments :
1490 * dec : Decoder context
1491 *
1492 * Values Returned : None
1493 *******************************************************************************/
impeg2d_dec_user_data(dec_state_t * ps_dec)1494 void impeg2d_dec_user_data(dec_state_t *ps_dec)
1495 {
1496 UWORD32 u4_start_code;
1497 stream_t *ps_stream;
1498
1499 ps_stream = &ps_dec->s_bit_stream;
1500 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1501
1502 while(u4_start_code == USER_DATA_START_CODE)
1503 {
1504 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
1505 while((impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX) &&
1506 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1507 {
1508 impeg2d_bit_stream_flush(ps_stream,8);
1509 }
1510 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1511 }
1512 }
1513 /*******************************************************************************
1514 * Function Name : impeg2d_dec_seq_ext_data
1515 *
1516 * Description : Decodes the extension data following Sequence
1517 * Extension. It flushes any user data if present
1518 *
1519 * Arguments :
1520 * dec : Decoder context
1521 *
1522 * Values Returned : None
1523 *******************************************************************************/
impeg2d_dec_seq_ext_data(dec_state_t * ps_dec)1524 IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_ext_data(dec_state_t *ps_dec)
1525 {
1526 stream_t *ps_stream;
1527 UWORD32 u4_start_code;
1528 IMPEG2D_ERROR_CODES_T e_error;
1529
1530 e_error = (IMPEG2D_ERROR_CODES_T) IVD_ERROR_NONE;
1531
1532 ps_stream = &ps_dec->s_bit_stream;
1533 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1534 while( (u4_start_code == EXTENSION_START_CODE ||
1535 u4_start_code == USER_DATA_START_CODE) &&
1536 (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE == e_error &&
1537 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1538 {
1539 if(u4_start_code == USER_DATA_START_CODE)
1540 {
1541 impeg2d_dec_user_data(ps_dec);
1542 }
1543 else
1544 {
1545 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
1546 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,EXT_ID_LEN);
1547 switch(u4_start_code)
1548 {
1549 case SEQ_DISPLAY_EXT_ID:
1550 impeg2d_dec_seq_disp_ext(ps_dec);
1551 break;
1552 case SEQ_SCALABLE_EXT_ID:
1553 e_error = IMPEG2D_SCALABILITIY_NOT_SUPPORTED;
1554 break;
1555 default:
1556 /* In case its a reserved extension code */
1557 impeg2d_bit_stream_flush(ps_stream,EXT_ID_LEN);
1558 impeg2d_peek_next_start_code(ps_dec);
1559 break;
1560 }
1561 }
1562 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1563 }
1564 return e_error;
1565 }
1566 /*******************************************************************************
1567 * Function Name : impeg2d_dec_pic_ext_data
1568 *
1569 * Description : Decodes the extension data following Picture Coding
1570 * Extension. It flushes any user data if present
1571 *
1572 * Arguments :
1573 * dec : Decoder context
1574 *
1575 * Values Returned : None
1576 *******************************************************************************/
impeg2d_dec_pic_ext_data(dec_state_t * ps_dec)1577 IMPEG2D_ERROR_CODES_T impeg2d_dec_pic_ext_data(dec_state_t *ps_dec)
1578 {
1579 stream_t *ps_stream;
1580 UWORD32 u4_start_code;
1581 IMPEG2D_ERROR_CODES_T e_error;
1582
1583 e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
1584
1585 ps_stream = &ps_dec->s_bit_stream;
1586 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1587 while ( (u4_start_code == EXTENSION_START_CODE ||
1588 u4_start_code == USER_DATA_START_CODE) &&
1589 (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE == e_error &&
1590 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1591 {
1592 if(u4_start_code == USER_DATA_START_CODE)
1593 {
1594 impeg2d_dec_user_data(ps_dec);
1595 }
1596 else
1597 {
1598 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
1599 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,EXT_ID_LEN);
1600 switch(u4_start_code)
1601 {
1602 case QUANT_MATRIX_EXT_ID:
1603 impeg2d_dec_quant_matrix_ext(ps_dec);
1604 break;
1605 case COPYRIGHT_EXT_ID:
1606 impeg2d_dec_copyright_ext(ps_dec);
1607 break;
1608 case PIC_DISPLAY_EXT_ID:
1609 impeg2d_dec_pic_disp_ext(ps_dec);
1610 break;
1611 case CAMERA_PARAM_EXT_ID:
1612 impeg2d_dec_cam_param_ext(ps_dec);
1613 break;
1614 case ITU_T_EXT_ID:
1615 impeg2d_dec_itu_t_ext(ps_dec);
1616 break;
1617 case PIC_SPATIAL_SCALABLE_EXT_ID:
1618 case PIC_TEMPORAL_SCALABLE_EXT_ID:
1619 e_error = IMPEG2D_SCALABLITY_NOT_SUP;
1620 break;
1621 default:
1622 /* In case its a reserved extension code */
1623 impeg2d_bit_stream_flush(ps_stream,EXT_ID_LEN);
1624 impeg2d_next_start_code(ps_dec);
1625 break;
1626 }
1627 }
1628 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1629 }
1630 return e_error;
1631 }
1632
1633 /*******************************************************************************
1634 *
1635 * Function Name : impeg2d_process_video_header
1636 *
1637 * Description : Processes video sequence header information
1638 *
1639 * Arguments :
1640 * dec : Decoder context
1641 *
1642 * Values Returned : None
1643 *******************************************************************************/
impeg2d_process_video_header(dec_state_t * ps_dec)1644 IMPEG2D_ERROR_CODES_T impeg2d_process_video_header(dec_state_t *ps_dec)
1645 {
1646 stream_t *ps_stream;
1647 ps_stream = &ps_dec->s_bit_stream;
1648 IMPEG2D_ERROR_CODES_T e_error;
1649
1650 impeg2d_next_code(ps_dec, SEQUENCE_HEADER_CODE);
1651 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1652 {
1653 e_error = impeg2d_dec_seq_hdr(ps_dec);
1654 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1655 {
1656 return e_error;
1657 }
1658 }
1659 else
1660 {
1661 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1662 }
1663 if (impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == EXTENSION_START_CODE)
1664 {
1665 /* MPEG2 Decoder */
1666 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1667 {
1668 e_error = impeg2d_dec_seq_ext(ps_dec);
1669 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1670 {
1671 return e_error;
1672 }
1673 }
1674 else
1675 {
1676 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1677 }
1678 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1679 {
1680 e_error = impeg2d_dec_seq_ext_data(ps_dec);
1681 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1682 {
1683 return e_error;
1684 }
1685 }
1686 return impeg2d_init_video_state(ps_dec,MPEG_2_VIDEO);
1687 }
1688 else
1689 {
1690 /* MPEG1 Decoder */
1691 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1692 {
1693 impeg2d_flush_ext_and_user_data(ps_dec);
1694 }
1695 return impeg2d_init_video_state(ps_dec,MPEG_1_VIDEO);
1696 }
1697 }
1698 /*******************************************************************************
1699 *
1700 * Function Name : impeg2d_process_video_bit_stream
1701 *
1702 * Description : Processes video sequence header information
1703 *
1704 * Arguments :
1705 * dec : Decoder context
1706 *
1707 * Values Returned : None
1708 *******************************************************************************/
impeg2d_process_video_bit_stream(dec_state_t * ps_dec)1709 IMPEG2D_ERROR_CODES_T impeg2d_process_video_bit_stream(dec_state_t *ps_dec)
1710 {
1711 stream_t *ps_stream;
1712 UWORD32 u4_next_bits, u4_start_code_found;
1713 IMPEG2D_ERROR_CODES_T e_error;
1714
1715 ps_stream = &ps_dec->s_bit_stream;
1716 impeg2d_next_start_code(ps_dec);
1717 /* If the stream is MPEG-2 compliant stream */
1718 u4_start_code_found = 0;
1719
1720 if(ps_dec->u2_is_mpeg2)
1721 {
1722 /* MPEG2 decoding starts */
1723 while((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
1724 {
1725 u4_next_bits = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1726
1727 if(u4_next_bits == SEQUENCE_HEADER_CODE)
1728 {
1729 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1730 {
1731 e_error = impeg2d_dec_seq_hdr(ps_dec);
1732 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1733 {
1734 return e_error;
1735 }
1736
1737 u4_start_code_found = 0;
1738
1739 }
1740 else
1741 {
1742 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1743 }
1744
1745
1746 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1747 {
1748 IMPEG2D_ERROR_CODES_T e_error;
1749 e_error = impeg2d_dec_seq_ext(ps_dec);
1750 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1751 {
1752 return e_error;
1753 }
1754 u4_start_code_found = 0;
1755
1756 }
1757 else
1758 {
1759 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1760 }
1761 }
1762 else if((u4_next_bits == USER_DATA_START_CODE) || (u4_next_bits == EXTENSION_START_CODE))
1763 {
1764 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1765 {
1766 impeg2d_dec_seq_ext_data(ps_dec);
1767 u4_start_code_found = 0;
1768
1769 }
1770
1771 }
1772 else if((ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1773 && (u4_next_bits == GOP_START_CODE))
1774 {
1775 impeg2d_dec_grp_of_pic_hdr(ps_dec);
1776 impeg2d_dec_user_data(ps_dec);
1777 u4_start_code_found = 0;
1778
1779 }
1780 else if((ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1781 && (u4_next_bits == PICTURE_START_CODE))
1782 {
1783 ps_dec->i4_pic_count++;
1784
1785 e_error = impeg2d_dec_pic_hdr(ps_dec);
1786 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1787 {
1788 return e_error;
1789 }
1790 e_error = impeg2d_dec_pic_coding_ext(ps_dec);
1791 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1792 {
1793 return e_error;
1794 }
1795 e_error = impeg2d_dec_pic_ext_data(ps_dec);
1796 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1797 {
1798 return e_error;
1799 }
1800 e_error = impeg2d_pre_pic_dec_proc(ps_dec);
1801 if ((IMPEG2D_ERROR_CODES_T) IVD_ERROR_NONE != e_error)
1802 {
1803 return e_error;
1804 }
1805 impeg2d_dec_pic_data(ps_dec);
1806 impeg2d_post_pic_dec_proc(ps_dec);
1807 u4_start_code_found = 1;
1808 }
1809 else
1810
1811 {
1812 FLUSH_BITS(ps_dec->s_bit_stream.u4_offset, ps_dec->s_bit_stream.u4_buf, ps_dec->s_bit_stream.u4_buf_nxt, 8, ps_dec->s_bit_stream.pu4_buf_aligned);
1813
1814 }
1815 if(u4_start_code_found == 0)
1816 {
1817 impeg2d_next_start_code(ps_dec);
1818 /* In case a dec_pic_data call has not been made, the number of
1819 * bytes consumed in the previous header decode has to be
1820 * consumed. Not consuming it will result in zero bytes consumed
1821 * loops in case there are multiple headers and the second
1822 * or a future header has a resolution change/other error where
1823 * the bytes of the last header are not consumed.
1824 */
1825 ps_dec->i4_bytes_consumed = (ps_dec->s_bit_stream.u4_offset + 7) >> 3;
1826 ps_dec->i4_bytes_consumed -= ((size_t)ps_dec->s_bit_stream.pv_bs_buf & 3);
1827 }
1828 }
1829 if((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset))
1830 {
1831 return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND;
1832 }
1833
1834 }
1835 /* If the stream is MPEG-1 compliant stream */
1836 else
1837 {
1838 while((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
1839 {
1840 u4_next_bits = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1841
1842 if(impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == SEQUENCE_HEADER_CODE)
1843 {
1844 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1845 {
1846 e_error = impeg2d_dec_seq_hdr(ps_dec);
1847 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1848 {
1849 return e_error;
1850 }
1851
1852 u4_start_code_found = 0;
1853 }
1854 else
1855 {
1856 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1857 }
1858 }
1859 else if((ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) && (u4_next_bits == EXTENSION_START_CODE || u4_next_bits == USER_DATA_START_CODE))
1860 {
1861 impeg2d_flush_ext_and_user_data(ps_dec);
1862 u4_start_code_found = 0;
1863 }
1864
1865
1866 else if ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == GOP_START_CODE)
1867 && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
1868 {
1869 impeg2d_dec_grp_of_pic_hdr(ps_dec);
1870 impeg2d_flush_ext_and_user_data(ps_dec);
1871 u4_start_code_found = 0;
1872 }
1873 else if ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == PICTURE_START_CODE)
1874 && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
1875 {
1876 ps_dec->i4_pic_count++;
1877
1878 e_error = impeg2d_dec_pic_hdr(ps_dec);
1879 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1880 {
1881 return e_error;
1882 }
1883 impeg2d_flush_ext_and_user_data(ps_dec);
1884 impeg2d_pre_pic_dec_proc(ps_dec);
1885 impeg2d_dec_pic_data(ps_dec);
1886 impeg2d_post_pic_dec_proc(ps_dec);
1887 u4_start_code_found = 1;
1888 }
1889 else
1890 {
1891 FLUSH_BITS(ps_dec->s_bit_stream.u4_offset, ps_dec->s_bit_stream.u4_buf, ps_dec->s_bit_stream.u4_buf_nxt, 8, ps_dec->s_bit_stream.pu4_buf_aligned);
1892 }
1893 impeg2d_next_start_code(ps_dec);
1894 if (0 == u4_start_code_found)
1895 {
1896 /* In case a dec_pic_data call has not been made, the number of
1897 * bytes consumed in the previous header decode has to be
1898 * consumed. Not consuming it will result in zero bytes consumed
1899 * loops in case there are multiple headers and the second
1900 * or a future header has a resolution change/other error where
1901 * the bytes of the last header are not consumed.
1902 */
1903 ps_dec->i4_bytes_consumed = (ps_dec->s_bit_stream.u4_offset + 7) >> 3;
1904 ps_dec->i4_bytes_consumed -= ((size_t)ps_dec->s_bit_stream.pv_bs_buf & 3);
1905 }
1906 }
1907 if((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset))
1908 {
1909 return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND;
1910 }
1911 }
1912
1913 return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
1914 }
1915