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 <log/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
766 UWORD32 u4_val;
767 stream_t *ps_stream;
768 IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T) IV_SUCCESS;
769
770 ps_stream = &ps_dec->s_bit_stream;
771 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
772 /* extension code identifier */
773 impeg2d_bit_stream_get(ps_stream,4);
774
775 u4_val = impeg2d_bit_stream_get(ps_stream,4);
776 if(u4_val == 0)
777 return IMPEG2D_UNKNOWN_ERROR;
778 ps_dec->au2_f_code[0][0] = u4_val;
779
780 u4_val = impeg2d_bit_stream_get(ps_stream,4);
781 if(u4_val == 0)
782 return IMPEG2D_UNKNOWN_ERROR;
783 ps_dec->au2_f_code[0][1] = u4_val;
784
785 u4_val = impeg2d_bit_stream_get(ps_stream,4);
786 if(u4_val == 0)
787 return IMPEG2D_UNKNOWN_ERROR;
788 ps_dec->au2_f_code[1][0] = u4_val;
789
790 u4_val = impeg2d_bit_stream_get(ps_stream,4);
791 if(u4_val == 0)
792 return IMPEG2D_UNKNOWN_ERROR;
793 ps_dec->au2_f_code[1][1] = u4_val;
794
795 ps_dec->u2_intra_dc_precision = impeg2d_bit_stream_get(ps_stream,2);
796 ps_dec->u2_picture_structure = impeg2d_bit_stream_get(ps_stream,2);
797 if (ps_dec->u2_picture_structure < TOP_FIELD ||
798 ps_dec->u2_picture_structure > FRAME_PICTURE)
799 {
800 return IMPEG2D_FRM_HDR_DECODE_ERR;
801 }
802 ps_dec->u2_top_field_first = impeg2d_bit_stream_get_bit(ps_stream);
803 ps_dec->u2_frame_pred_frame_dct = impeg2d_bit_stream_get_bit(ps_stream);
804 ps_dec->u2_concealment_motion_vectors = impeg2d_bit_stream_get_bit(ps_stream);
805 ps_dec->u2_q_scale_type = impeg2d_bit_stream_get_bit(ps_stream);
806 ps_dec->u2_intra_vlc_format = impeg2d_bit_stream_get_bit(ps_stream);
807 ps_dec->u2_alternate_scan = impeg2d_bit_stream_get_bit(ps_stream);
808 ps_dec->u2_repeat_first_field = impeg2d_bit_stream_get_bit(ps_stream);
809 /* Flush chroma_420_type */
810 impeg2d_bit_stream_get_bit(ps_stream);
811
812 ps_dec->u2_progressive_frame = impeg2d_bit_stream_get_bit(ps_stream);
813 if (impeg2d_bit_stream_get_bit(ps_stream))
814 {
815 /* Flush v_axis, field_sequence, burst_amplitude, sub_carrier_phase */
816 impeg2d_bit_stream_flush(ps_stream,20);
817 }
818 impeg2d_next_start_code(ps_dec);
819
820
821 if(VERTICAL_SCAN == ps_dec->u2_alternate_scan)
822 {
823 ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_vertical;
824 }
825 else
826 {
827 ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_zig_zag;
828 }
829 return e_error;
830 }
831
832 /*******************************************************************************
833 *
834 * Function Name : impeg2d_dec_slice
835 *
836 * Description : Reads Slice level parameters and calls functions that
837 * decode individual MBs of slice
838 *
839 * Arguments :
840 * dec : Decoder context
841 *
842 * Values Returned : None
843 *******************************************************************************/
impeg2d_dec_slice(dec_state_t * ps_dec)844 IMPEG2D_ERROR_CODES_T impeg2d_dec_slice(dec_state_t *ps_dec)
845 {
846 stream_t *ps_stream;
847 UWORD32 u4_slice_vertical_position;
848 UWORD32 u4_slice_vertical_position_extension;
849 IMPEG2D_ERROR_CODES_T e_error;
850
851 ps_stream = &ps_dec->s_bit_stream;
852
853 /*------------------------------------------------------------------------*/
854 /* All the profiles supported require restricted slice structure. Hence */
855 /* there is no need to store slice_vertical_position. Note that max */
856 /* height supported does not exceed 2800 and scalablity is not supported */
857 /*------------------------------------------------------------------------*/
858
859 /* Remove the slice start code */
860 impeg2d_bit_stream_flush(ps_stream,START_CODE_PREFIX_LEN);
861 u4_slice_vertical_position = impeg2d_bit_stream_get(ps_stream, 8);
862 if(u4_slice_vertical_position > 2800)
863 {
864 u4_slice_vertical_position_extension = impeg2d_bit_stream_get(ps_stream, 3);
865 u4_slice_vertical_position += (u4_slice_vertical_position_extension << 7);
866 }
867
868 if((u4_slice_vertical_position > ps_dec->u2_num_vert_mb) ||
869 (u4_slice_vertical_position == 0))
870 {
871 return IMPEG2D_INVALID_VERT_SIZE;
872 }
873
874 // change the mb_y to point to slice_vertical_position
875 u4_slice_vertical_position--;
876 if (ps_dec->u2_mb_y != u4_slice_vertical_position)
877 {
878 ps_dec->u2_mb_y = u4_slice_vertical_position;
879 ps_dec->u2_mb_x = 0;
880
881 /* Update the number of MBs left, since we have probably missed a slice
882 * (that's why we see a mismatch between u2_mb_y and current position).
883 */
884 ps_dec->u2_num_mbs_left = (ps_dec->u2_num_vert_mb - ps_dec->u2_mb_y)
885 * ps_dec->u2_num_horiz_mb;
886 }
887 ps_dec->u2_first_mb = 1;
888
889 /*------------------------------------------------------------------------*/
890 /* Quant scale code decoding */
891 /*------------------------------------------------------------------------*/
892 {
893 UWORD16 u2_quant_scale_code;
894 u2_quant_scale_code = impeg2d_bit_stream_get(ps_stream,5);
895 ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
896 gau1_impeg2_non_linear_quant_scale[u2_quant_scale_code] : (u2_quant_scale_code << 1);
897 }
898
899 if (impeg2d_bit_stream_nxt(ps_stream,1) == 1)
900 {
901 impeg2d_bit_stream_flush(ps_stream,9);
902 /* Flush extra bit information */
903 while (impeg2d_bit_stream_nxt(ps_stream,1) == 1 &&
904 ps_stream->u4_offset < ps_stream->u4_max_offset)
905 {
906 impeg2d_bit_stream_flush(ps_stream,9);
907 }
908 }
909 impeg2d_bit_stream_get_bit(ps_stream);
910
911 /* Reset the DC predictors to reset values given in Table 7.2 at the start*/
912 /* of slice data */
913 ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision;
914 ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
915 ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision;
916 /*------------------------------------------------------------------------*/
917 /* dec->DecMBsinSlice() implements the following psuedo code from standard*/
918 /* do */
919 /* { */
920 /* macroblock() */
921 /* } while (impeg2d_bit_stream_nxt() != '000 0000 0000 0000 0000 0000') */
922 /*------------------------------------------------------------------------*/
923
924 e_error = ps_dec->pf_decode_slice(ps_dec);
925 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
926 {
927 return e_error;
928 }
929
930 /* Check for the MBy index instead of number of MBs left, because the
931 * number of MBs left in case of multi-thread decode is the number of MBs
932 * in that row only
933 */
934 if(ps_dec->u2_mb_y < ps_dec->u2_num_vert_mb)
935 impeg2d_next_start_code(ps_dec);
936
937 return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
938 }
939
impeg2d_dec_pic_data_thread(dec_state_t * ps_dec)940 void impeg2d_dec_pic_data_thread(dec_state_t *ps_dec)
941 {
942 WORD32 i4_continue_decode;
943
944 WORD32 i4_cur_row, temp;
945 UWORD32 u4_bits_read;
946 WORD32 i4_dequeue_job;
947 IMPEG2D_ERROR_CODES_T e_error;
948
949 i4_cur_row = ps_dec->u2_mb_y + 1;
950
951 i4_continue_decode = 1;
952
953 i4_dequeue_job = 1;
954 do
955 {
956 if(i4_cur_row > ps_dec->u2_num_vert_mb)
957 {
958 i4_continue_decode = 0;
959 break;
960 }
961
962 {
963 if((ps_dec->i4_num_cores> 1) && (i4_dequeue_job))
964 {
965 job_t s_job;
966 IV_API_CALL_STATUS_T e_ret;
967 UWORD8 *pu1_buf;
968
969 e_ret = impeg2_jobq_dequeue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 1);
970 if(e_ret != IV_SUCCESS)
971 break;
972
973 if(CMD_PROCESS == s_job.i4_cmd)
974 {
975 pu1_buf = ps_dec->pu1_inp_bits_buf + s_job.i4_bistream_ofst;
976 impeg2d_bit_stream_init(&(ps_dec->s_bit_stream), pu1_buf,
977 (ps_dec->u4_num_inp_bytes - s_job.i4_bistream_ofst));
978 i4_cur_row = s_job.i2_start_mb_y;
979 ps_dec->i4_start_mb_y = s_job.i2_start_mb_y;
980 ps_dec->i4_end_mb_y = s_job.i2_end_mb_y;
981 ps_dec->u2_mb_x = 0;
982 ps_dec->u2_mb_y = ps_dec->i4_start_mb_y;
983 ps_dec->u2_num_mbs_left = (ps_dec->i4_end_mb_y - ps_dec->i4_start_mb_y) * ps_dec->u2_num_horiz_mb;
984
985 }
986 else
987 {
988 WORD32 start_row;
989 WORD32 num_rows;
990 start_row = s_job.i2_start_mb_y << 4;
991 num_rows = MIN((s_job.i2_end_mb_y << 4), ps_dec->u2_vertical_size);
992 num_rows -= start_row;
993
994 if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame))
995 {
996 impeg2d_deinterlace(ps_dec,
997 ps_dec->ps_disp_pic,
998 ps_dec->ps_disp_frm_buf,
999 start_row,
1000 num_rows);
1001
1002 }
1003 else
1004 {
1005 impeg2d_format_convert(ps_dec, ps_dec->ps_disp_pic,
1006 ps_dec->ps_disp_frm_buf,
1007 start_row, num_rows);
1008 }
1009 break;
1010
1011 }
1012
1013 }
1014 e_error = impeg2d_dec_slice(ps_dec);
1015
1016 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1017 {
1018 impeg2d_next_start_code(ps_dec);
1019 if(ps_dec->s_bit_stream.u4_offset >= ps_dec->s_bit_stream.u4_max_offset)
1020 {
1021 ps_dec->u4_error_code = IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1022 return;
1023 }
1024 }
1025 }
1026
1027 /* Detecting next slice start code */
1028 while(1)
1029 {
1030 // skip (dec->u4_num_cores-1) rows
1031 u4_bits_read = impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,START_CODE_LEN);
1032 temp = u4_bits_read & 0xFF;
1033 i4_continue_decode = (((u4_bits_read >> 8) == 0x01) && (temp) && (temp <= 0xAF));
1034
1035 if (1 == ps_dec->i4_num_cores && 0 == ps_dec->u2_num_mbs_left)
1036 {
1037 i4_continue_decode = 0;
1038 #ifdef __ANDROID__
1039 android_errorWriteLog(0x534e4554, "26070014");
1040 #endif
1041 }
1042
1043 if(i4_continue_decode)
1044 {
1045 if (0 != ps_dec->u2_num_mbs_left)
1046 {
1047 /* If the slice is from the same row, then continue decoding without dequeue */
1048 if((temp - 1) == i4_cur_row)
1049 {
1050 i4_dequeue_job = 0;
1051 }
1052 else
1053 {
1054 if(temp < ps_dec->i4_end_mb_y)
1055 {
1056 i4_cur_row = ps_dec->u2_mb_y;
1057 }
1058 else
1059 {
1060 i4_dequeue_job = 1;
1061 }
1062 }
1063 }
1064 else
1065 {
1066 i4_dequeue_job = 1;
1067 }
1068 break;
1069 }
1070 else
1071 break;
1072 }
1073
1074 }while(i4_continue_decode);
1075 if(ps_dec->i4_num_cores > 1)
1076 {
1077 while(1)
1078 {
1079 job_t s_job;
1080 IV_API_CALL_STATUS_T e_ret;
1081
1082 e_ret = impeg2_jobq_dequeue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 1);
1083 if(e_ret != IV_SUCCESS)
1084 break;
1085 if(CMD_FMTCONV == s_job.i4_cmd)
1086 {
1087 WORD32 start_row;
1088 WORD32 num_rows;
1089 start_row = s_job.i2_start_mb_y << 4;
1090 num_rows = MIN((s_job.i2_end_mb_y << 4), ps_dec->u2_vertical_size);
1091 num_rows -= start_row;
1092 if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame))
1093 {
1094 impeg2d_deinterlace(ps_dec,
1095 ps_dec->ps_disp_pic,
1096 ps_dec->ps_disp_frm_buf,
1097 start_row,
1098 num_rows);
1099
1100 }
1101 else
1102 {
1103 impeg2d_format_convert(ps_dec,
1104 ps_dec->ps_disp_pic,
1105 ps_dec->ps_disp_frm_buf,
1106 start_row,
1107 num_rows);
1108 }
1109 }
1110 }
1111 }
1112 else
1113 {
1114 if((NULL != ps_dec->ps_disp_pic) && ((0 == ps_dec->u4_share_disp_buf) || (IV_YUV_420P != ps_dec->i4_chromaFormat)))
1115 {
1116 if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame))
1117 {
1118 impeg2d_deinterlace(ps_dec,
1119 ps_dec->ps_disp_pic,
1120 ps_dec->ps_disp_frm_buf,
1121 0,
1122 ps_dec->u2_vertical_size);
1123
1124 }
1125 else
1126 {
1127 impeg2d_format_convert(ps_dec, ps_dec->ps_disp_pic,
1128 ps_dec->ps_disp_frm_buf,
1129 0, ps_dec->u2_vertical_size);
1130 }
1131 }
1132 }
1133 }
1134
impeg2d_init_thread_dec_ctxt(dec_state_t * ps_dec,dec_state_t * ps_dec_thd,WORD32 i4_min_mb_y)1135 static WORD32 impeg2d_init_thread_dec_ctxt(dec_state_t *ps_dec,
1136 dec_state_t *ps_dec_thd,
1137 WORD32 i4_min_mb_y)
1138 {
1139 UNUSED(i4_min_mb_y);
1140 ps_dec_thd->i4_start_mb_y = 0;
1141 ps_dec_thd->i4_end_mb_y = ps_dec->u2_num_vert_mb;
1142 ps_dec_thd->u2_mb_x = 0;
1143 ps_dec_thd->u2_mb_y = 0;
1144 ps_dec_thd->u2_is_mpeg2 = ps_dec->u2_is_mpeg2;
1145 ps_dec_thd->i4_pic_count = ps_dec->i4_pic_count;
1146 ps_dec_thd->u2_frame_width = ps_dec->u2_frame_width;
1147 ps_dec_thd->u2_frame_height = ps_dec->u2_frame_height;
1148 ps_dec_thd->u2_picture_width = ps_dec->u2_picture_width;
1149 ps_dec_thd->u2_horizontal_size = ps_dec->u2_horizontal_size;
1150 ps_dec_thd->u2_vertical_size = ps_dec->u2_vertical_size;
1151 ps_dec_thd->u2_create_max_width = ps_dec->u2_create_max_width;
1152 ps_dec_thd->u2_create_max_height = ps_dec->u2_create_max_height;
1153 ps_dec_thd->u2_header_done = ps_dec->u2_header_done;
1154 ps_dec_thd->u2_decode_header = ps_dec->u2_decode_header;
1155
1156 ps_dec_thd->u2_num_horiz_mb = ps_dec->u2_num_horiz_mb;
1157 ps_dec_thd->u2_num_vert_mb = ps_dec->u2_num_vert_mb;
1158 ps_dec_thd->u2_num_flds_decoded = ps_dec->u2_num_flds_decoded;
1159
1160 ps_dec_thd->u4_frm_buf_stride = ps_dec->u4_frm_buf_stride;
1161
1162 ps_dec_thd->u2_field_dct = ps_dec->u2_field_dct;
1163 ps_dec_thd->u2_read_dct_type = ps_dec->u2_read_dct_type;
1164
1165 ps_dec_thd->u2_read_motion_type = ps_dec->u2_read_motion_type;
1166 ps_dec_thd->u2_motion_type = ps_dec->u2_motion_type;
1167
1168 ps_dec_thd->pu2_mb_type = ps_dec->pu2_mb_type;
1169 ps_dec_thd->u2_fld_pic = ps_dec->u2_fld_pic;
1170 ps_dec_thd->u2_frm_pic = ps_dec->u2_frm_pic;
1171
1172 ps_dec_thd->u2_fld_parity = ps_dec->u2_fld_parity;
1173
1174 ps_dec_thd->au2_fcode_data[0] = ps_dec->au2_fcode_data[0];
1175 ps_dec_thd->au2_fcode_data[1] = ps_dec->au2_fcode_data[1];
1176
1177 ps_dec_thd->u1_quant_scale = ps_dec->u1_quant_scale;
1178
1179 ps_dec_thd->u2_num_mbs_left = ps_dec->u2_num_mbs_left;
1180 ps_dec_thd->u2_first_mb = ps_dec->u2_first_mb;
1181 ps_dec_thd->u2_num_skipped_mbs = ps_dec->u2_num_skipped_mbs;
1182
1183 memcpy(&ps_dec_thd->s_cur_frm_buf, &ps_dec->s_cur_frm_buf, sizeof(yuv_buf_t));
1184 memcpy(&ps_dec_thd->as_recent_fld[0][0], &ps_dec->as_recent_fld[0][0], sizeof(yuv_buf_t));
1185 memcpy(&ps_dec_thd->as_recent_fld[0][1], &ps_dec->as_recent_fld[0][1], sizeof(yuv_buf_t));
1186 memcpy(&ps_dec_thd->as_recent_fld[1][0], &ps_dec->as_recent_fld[1][0], sizeof(yuv_buf_t));
1187 memcpy(&ps_dec_thd->as_recent_fld[1][1], &ps_dec->as_recent_fld[1][1], sizeof(yuv_buf_t));
1188 memcpy(&ps_dec_thd->as_ref_buf, &ps_dec->as_ref_buf, sizeof(yuv_buf_t) * 2 * 2);
1189
1190
1191 ps_dec_thd->pf_decode_slice = ps_dec->pf_decode_slice;
1192
1193 ps_dec_thd->pf_vld_inv_quant = ps_dec->pf_vld_inv_quant;
1194
1195 memcpy(ps_dec_thd->pf_idct_recon, ps_dec->pf_idct_recon, sizeof(ps_dec->pf_idct_recon));
1196
1197 memcpy(ps_dec_thd->pf_mc, ps_dec->pf_mc, sizeof(ps_dec->pf_mc));
1198 ps_dec_thd->pf_interpolate = ps_dec->pf_interpolate;
1199 ps_dec_thd->pf_copy_mb = ps_dec->pf_copy_mb;
1200 ps_dec_thd->pf_fullx_halfy_8x8 = ps_dec->pf_fullx_halfy_8x8;
1201 ps_dec_thd->pf_halfx_fully_8x8 = ps_dec->pf_halfx_fully_8x8;
1202 ps_dec_thd->pf_halfx_halfy_8x8 = ps_dec->pf_halfx_halfy_8x8;
1203 ps_dec_thd->pf_fullx_fully_8x8 = ps_dec->pf_fullx_fully_8x8;
1204
1205 ps_dec_thd->pf_memset_8bit_8x8_block = ps_dec->pf_memset_8bit_8x8_block;
1206 ps_dec_thd->pf_memset_16bit_8x8_linear_block = ps_dec->pf_memset_16bit_8x8_linear_block;
1207 ps_dec_thd->pf_copy_yuv420p_buf = ps_dec->pf_copy_yuv420p_buf;
1208 ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv422ile = ps_dec->pf_fmt_conv_yuv420p_to_yuv422ile;
1209 ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv420sp_uv = ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_uv;
1210 ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv420sp_vu = ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_vu;
1211
1212
1213 memcpy(ps_dec_thd->au1_intra_quant_matrix, ps_dec->au1_intra_quant_matrix, NUM_PELS_IN_BLOCK * sizeof(UWORD8));
1214 memcpy(ps_dec_thd->au1_inter_quant_matrix, ps_dec->au1_inter_quant_matrix, NUM_PELS_IN_BLOCK * sizeof(UWORD8));
1215 ps_dec_thd->pu1_inv_scan_matrix = ps_dec->pu1_inv_scan_matrix;
1216
1217
1218 ps_dec_thd->u2_progressive_sequence = ps_dec->u2_progressive_sequence;
1219 ps_dec_thd->e_pic_type = ps_dec->e_pic_type;
1220 ps_dec_thd->u2_full_pel_forw_vector = ps_dec->u2_full_pel_forw_vector;
1221 ps_dec_thd->u2_forw_f_code = ps_dec->u2_forw_f_code;
1222 ps_dec_thd->u2_full_pel_back_vector = ps_dec->u2_full_pel_back_vector;
1223 ps_dec_thd->u2_back_f_code = ps_dec->u2_back_f_code;
1224
1225 memcpy(ps_dec_thd->ai2_mv, ps_dec->ai2_mv, (2*2*2)*sizeof(WORD16));
1226 memcpy(ps_dec_thd->au2_f_code, ps_dec->au2_f_code, (2*2)*sizeof(UWORD16));
1227 ps_dec_thd->u2_intra_dc_precision = ps_dec->u2_intra_dc_precision;
1228 ps_dec_thd->u2_picture_structure = ps_dec->u2_picture_structure;
1229 ps_dec_thd->u2_top_field_first = ps_dec->u2_top_field_first;
1230 ps_dec_thd->u2_frame_pred_frame_dct = ps_dec->u2_frame_pred_frame_dct;
1231 ps_dec_thd->u2_concealment_motion_vectors = ps_dec->u2_concealment_motion_vectors;
1232 ps_dec_thd->u2_q_scale_type = ps_dec->u2_q_scale_type;
1233 ps_dec_thd->u2_intra_vlc_format = ps_dec->u2_intra_vlc_format;
1234 ps_dec_thd->u2_alternate_scan = ps_dec->u2_alternate_scan;
1235 ps_dec_thd->u2_repeat_first_field = ps_dec->u2_repeat_first_field;
1236 ps_dec_thd->u2_progressive_frame = ps_dec->u2_progressive_frame;
1237 ps_dec_thd->pu1_inp_bits_buf = ps_dec->pu1_inp_bits_buf;
1238 ps_dec_thd->u4_num_inp_bytes = ps_dec->u4_num_inp_bytes;
1239 ps_dec_thd->pv_jobq = ps_dec->pv_jobq;
1240 ps_dec_thd->pv_jobq_buf = ps_dec->pv_jobq_buf;
1241 ps_dec_thd->i4_jobq_buf_size = ps_dec->i4_jobq_buf_size;
1242
1243
1244 ps_dec_thd->u2_frame_rate_code = ps_dec->u2_frame_rate_code;
1245 ps_dec_thd->u2_frame_rate_extension_n = ps_dec->u2_frame_rate_extension_n;
1246 ps_dec_thd->u2_frame_rate_extension_d = ps_dec->u2_frame_rate_extension_d;
1247 ps_dec_thd->u2_framePeriod = ps_dec->u2_framePeriod;
1248 ps_dec_thd->u2_display_horizontal_size = ps_dec->u2_display_horizontal_size;
1249 ps_dec_thd->u2_display_vertical_size = ps_dec->u2_display_vertical_size;
1250 ps_dec_thd->u2_aspect_ratio_info = ps_dec->u2_aspect_ratio_info;
1251
1252 ps_dec_thd->ps_func_bi_direct = ps_dec->ps_func_bi_direct;
1253 ps_dec_thd->ps_func_forw_or_back = ps_dec->ps_func_forw_or_back;
1254 ps_dec_thd->pv_deinterlacer_ctxt = ps_dec->pv_deinterlacer_ctxt;
1255 ps_dec_thd->ps_deint_pic = ps_dec->ps_deint_pic;
1256
1257 return 0;
1258 }
1259
1260
impeg2d_get_slice_pos(dec_state_multi_core_t * ps_dec_state_multi_core)1261 WORD32 impeg2d_get_slice_pos(dec_state_multi_core_t *ps_dec_state_multi_core)
1262 {
1263 WORD32 u4_bits;
1264 WORD32 i4_row;
1265
1266
1267 dec_state_t *ps_dec = ps_dec_state_multi_core->ps_dec_state[0];
1268 WORD32 i4_prev_row;
1269 stream_t s_bitstrm;
1270 WORD32 i4_start_row;
1271 WORD32 i4_slice_bistream_ofst;
1272 WORD32 i;
1273 s_bitstrm = ps_dec->s_bit_stream;
1274 i4_prev_row = -1;
1275
1276 ps_dec_state_multi_core->ps_dec_state[0]->i4_start_mb_y = 0;
1277 ps_dec_state_multi_core->ps_dec_state[1]->i4_start_mb_y = -1;
1278 ps_dec_state_multi_core->ps_dec_state[2]->i4_start_mb_y = -1;
1279 ps_dec_state_multi_core->ps_dec_state[3]->i4_start_mb_y = -1;
1280
1281 ps_dec_state_multi_core->ps_dec_state[0]->i4_end_mb_y = ps_dec->u2_num_vert_mb;
1282 ps_dec_state_multi_core->ps_dec_state[1]->i4_end_mb_y = -1;
1283 ps_dec_state_multi_core->ps_dec_state[2]->i4_end_mb_y = -1;
1284 ps_dec_state_multi_core->ps_dec_state[3]->i4_end_mb_y = -1;
1285
1286 if(ps_dec->i4_num_cores == 1)
1287 return 0;
1288 /* Reset the jobq to start of the jobq buffer */
1289 impeg2_jobq_reset((jobq_t *)ps_dec->pv_jobq);
1290
1291 i4_start_row = -1;
1292 i4_slice_bistream_ofst = 0;
1293 while(1)
1294 {
1295 WORD32 i4_is_slice;
1296
1297 if(s_bitstrm.u4_offset + START_CODE_LEN >= s_bitstrm.u4_max_offset)
1298 {
1299 break;
1300 }
1301 u4_bits = impeg2d_bit_stream_nxt(&s_bitstrm,START_CODE_LEN);
1302
1303 i4_row = u4_bits & 0xFF;
1304
1305 /* Detect end of frame */
1306 i4_is_slice = (((u4_bits >> 8) == 0x01) && (i4_row) && (i4_row <= ps_dec->u2_num_vert_mb));
1307 if(!i4_is_slice)
1308 break;
1309
1310 i4_row -= 1;
1311
1312
1313 if(i4_prev_row < i4_row)
1314 {
1315 /* Create a job for previous slice row */
1316 if(i4_start_row != -1)
1317 {
1318 job_t s_job;
1319 IV_API_CALL_STATUS_T ret;
1320 s_job.i2_start_mb_y = i4_start_row;
1321 s_job.i2_end_mb_y = i4_row;
1322 s_job.i4_cmd = CMD_PROCESS;
1323 s_job.i4_bistream_ofst = i4_slice_bistream_ofst;
1324 ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0);
1325 if(ret != IV_SUCCESS)
1326 return ret;
1327
1328 }
1329 /* Store current slice's bitstream offset */
1330 i4_slice_bistream_ofst = s_bitstrm.u4_offset >> 3;
1331 i4_slice_bistream_ofst -= (size_t)s_bitstrm.pv_bs_buf & 3;
1332 i4_prev_row = i4_row;
1333
1334 /* Store current slice's row position */
1335 i4_start_row = i4_row;
1336
1337 }
1338 #ifdef __ANDROID__
1339 else if (i4_prev_row > i4_row)
1340 {
1341 android_errorWriteLog(0x534e4554, "26070014");
1342 }
1343 #endif
1344
1345 impeg2d_bit_stream_flush(&s_bitstrm, START_CODE_LEN);
1346
1347 // flush bytes till next start code
1348 /* Flush the bytes till a start code is encountered */
1349 while(impeg2d_bit_stream_nxt(&s_bitstrm, 24) != START_CODE_PREFIX)
1350 {
1351 impeg2d_bit_stream_get(&s_bitstrm, 8);
1352
1353 if(s_bitstrm.u4_offset >= s_bitstrm.u4_max_offset)
1354 {
1355 break;
1356 }
1357 }
1358 }
1359
1360 /* Create job for the last slice row */
1361 {
1362 job_t s_job;
1363 IV_API_CALL_STATUS_T e_ret;
1364 s_job.i2_start_mb_y = i4_start_row;
1365 s_job.i2_end_mb_y = ps_dec->u2_num_vert_mb;
1366 s_job.i4_cmd = CMD_PROCESS;
1367 s_job.i4_bistream_ofst = i4_slice_bistream_ofst;
1368 e_ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0);
1369 if(e_ret != IV_SUCCESS)
1370 return e_ret;
1371
1372 }
1373 if((NULL != ps_dec->ps_disp_pic) && ((0 == ps_dec->u4_share_disp_buf) || (IV_YUV_420P != ps_dec->i4_chromaFormat)))
1374 {
1375 for(i = 0; i < ps_dec->u2_vertical_size; i+=64)
1376 {
1377 job_t s_job;
1378 IV_API_CALL_STATUS_T ret;
1379 s_job.i2_start_mb_y = i;
1380 s_job.i2_start_mb_y >>= 4;
1381 s_job.i2_end_mb_y = (i + 64);
1382 s_job.i2_end_mb_y >>= 4;
1383 s_job.i4_cmd = CMD_FMTCONV;
1384 s_job.i4_bistream_ofst = 0;
1385 ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0);
1386 if(ret != IV_SUCCESS)
1387 return ret;
1388
1389 }
1390 }
1391
1392 impeg2_jobq_terminate(ps_dec->pv_jobq);
1393 ps_dec->i4_bytes_consumed = s_bitstrm.u4_offset >> 3;
1394 ps_dec->i4_bytes_consumed -= ((size_t)s_bitstrm.pv_bs_buf & 3);
1395
1396 return 0;
1397 }
1398
1399 /*******************************************************************************
1400 *
1401 * Function Name : impeg2d_dec_pic_data
1402 *
1403 * Description : It intializes several parameters and decodes a Picture
1404 * till any slice is left.
1405 *
1406 * Arguments :
1407 * dec : Decoder context
1408 *
1409 * Values Returned : None
1410 *******************************************************************************/
1411
impeg2d_dec_pic_data(dec_state_t * ps_dec)1412 void impeg2d_dec_pic_data(dec_state_t *ps_dec)
1413 {
1414
1415 WORD32 i;
1416 dec_state_multi_core_t *ps_dec_state_multi_core;
1417
1418 dec_state_t *ps_dec_thd;
1419 WORD32 i4_status;
1420 WORD32 i4_min_mb_y;
1421
1422
1423 /* Resetting the MB address and MB coordinates at the start of the Frame */
1424 ps_dec->u2_mb_x = ps_dec->u2_mb_y = 0;
1425
1426 ps_dec_state_multi_core = ps_dec->ps_dec_state_multi_core;
1427 impeg2d_get_slice_pos(ps_dec_state_multi_core);
1428
1429 i4_min_mb_y = 1;
1430 for(i=0; i < ps_dec->i4_num_cores - 1; i++)
1431 {
1432 // initialize decoder context for thread
1433 // launch dec->u4_num_cores-1 threads
1434
1435 ps_dec_thd = ps_dec_state_multi_core->ps_dec_state[i+1];
1436
1437 ps_dec_thd->ps_disp_pic = ps_dec->ps_disp_pic;
1438 ps_dec_thd->ps_disp_frm_buf = ps_dec->ps_disp_frm_buf;
1439
1440 i4_status = impeg2d_init_thread_dec_ctxt(ps_dec, ps_dec_thd, i4_min_mb_y);
1441 //impeg2d_dec_pic_data_thread(ps_dec_thd);
1442
1443 if(i4_status == 0)
1444 {
1445 ithread_create(ps_dec_thd->pv_codec_thread_handle, NULL, (void *)impeg2d_dec_pic_data_thread, ps_dec_thd);
1446 ps_dec_state_multi_core->au4_thread_launched[i + 1] = 1;
1447 i4_min_mb_y = ps_dec_thd->u2_mb_y + 1;
1448 }
1449 else
1450 {
1451 ps_dec_state_multi_core->au4_thread_launched[i + 1] = 0;
1452 break;
1453 }
1454 }
1455
1456 impeg2d_dec_pic_data_thread(ps_dec);
1457
1458 // wait for threads to complete
1459 for(i=0; i < (ps_dec->i4_num_cores - 1); i++)
1460 {
1461 if(ps_dec_state_multi_core->au4_thread_launched[i + 1] == 1)
1462 {
1463 ps_dec_thd = ps_dec_state_multi_core->ps_dec_state[i+1];
1464 ithread_join(ps_dec_thd->pv_codec_thread_handle, NULL);
1465 }
1466 }
1467
1468 }
1469 /*******************************************************************************
1470 *
1471 * Function Name : impeg2d_flush_ext_and_user_data
1472 *
1473 * Description : Flushes the extension and user data present in the
1474 * stream_t
1475 *
1476 * Arguments :
1477 * dec : Decoder context
1478 *
1479 * Values Returned : None
1480 *******************************************************************************/
impeg2d_flush_ext_and_user_data(dec_state_t * ps_dec)1481 void impeg2d_flush_ext_and_user_data(dec_state_t *ps_dec)
1482 {
1483 UWORD32 u4_start_code;
1484 stream_t *ps_stream;
1485
1486 ps_stream = &ps_dec->s_bit_stream;
1487 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1488
1489 while((u4_start_code == EXTENSION_START_CODE || u4_start_code == USER_DATA_START_CODE) &&
1490 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1491 {
1492 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
1493 while(impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX &&
1494 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1495 {
1496 impeg2d_bit_stream_flush(ps_stream,8);
1497 }
1498 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1499 }
1500 }
1501 /*******************************************************************************
1502 *
1503 * Function Name : impeg2d_dec_user_data
1504 *
1505 * Description : Flushes the user data present in the stream_t
1506 *
1507 * Arguments :
1508 * dec : Decoder context
1509 *
1510 * Values Returned : None
1511 *******************************************************************************/
impeg2d_dec_user_data(dec_state_t * ps_dec)1512 void impeg2d_dec_user_data(dec_state_t *ps_dec)
1513 {
1514 UWORD32 u4_start_code;
1515 stream_t *ps_stream;
1516
1517 ps_stream = &ps_dec->s_bit_stream;
1518 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1519
1520 while(u4_start_code == USER_DATA_START_CODE)
1521 {
1522 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
1523 while((impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX) &&
1524 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1525 {
1526 impeg2d_bit_stream_flush(ps_stream,8);
1527 }
1528 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1529 }
1530 }
1531 /*******************************************************************************
1532 * Function Name : impeg2d_dec_seq_ext_data
1533 *
1534 * Description : Decodes the extension data following Sequence
1535 * Extension. It flushes any user data if present
1536 *
1537 * Arguments :
1538 * dec : Decoder context
1539 *
1540 * Values Returned : None
1541 *******************************************************************************/
impeg2d_dec_seq_ext_data(dec_state_t * ps_dec)1542 IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_ext_data(dec_state_t *ps_dec)
1543 {
1544 stream_t *ps_stream;
1545 UWORD32 u4_start_code;
1546 IMPEG2D_ERROR_CODES_T e_error;
1547
1548 e_error = (IMPEG2D_ERROR_CODES_T) IVD_ERROR_NONE;
1549
1550 ps_stream = &ps_dec->s_bit_stream;
1551 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1552 while( (u4_start_code == EXTENSION_START_CODE ||
1553 u4_start_code == USER_DATA_START_CODE) &&
1554 (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE == e_error &&
1555 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1556 {
1557 if(u4_start_code == USER_DATA_START_CODE)
1558 {
1559 impeg2d_dec_user_data(ps_dec);
1560 }
1561 else
1562 {
1563 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
1564 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,EXT_ID_LEN);
1565 switch(u4_start_code)
1566 {
1567 case SEQ_DISPLAY_EXT_ID:
1568 impeg2d_dec_seq_disp_ext(ps_dec);
1569 break;
1570 case SEQ_SCALABLE_EXT_ID:
1571 e_error = IMPEG2D_SCALABILITIY_NOT_SUPPORTED;
1572 break;
1573 default:
1574 /* In case its a reserved extension code */
1575 impeg2d_bit_stream_flush(ps_stream,EXT_ID_LEN);
1576 impeg2d_peek_next_start_code(ps_dec);
1577 break;
1578 }
1579 }
1580 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1581 }
1582 return e_error;
1583 }
1584 /*******************************************************************************
1585 * Function Name : impeg2d_dec_pic_ext_data
1586 *
1587 * Description : Decodes the extension data following Picture Coding
1588 * Extension. It flushes any user data if present
1589 *
1590 * Arguments :
1591 * dec : Decoder context
1592 *
1593 * Values Returned : None
1594 *******************************************************************************/
impeg2d_dec_pic_ext_data(dec_state_t * ps_dec)1595 IMPEG2D_ERROR_CODES_T impeg2d_dec_pic_ext_data(dec_state_t *ps_dec)
1596 {
1597 stream_t *ps_stream;
1598 UWORD32 u4_start_code;
1599 IMPEG2D_ERROR_CODES_T e_error;
1600
1601 e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
1602
1603 ps_stream = &ps_dec->s_bit_stream;
1604 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1605 while ( (u4_start_code == EXTENSION_START_CODE ||
1606 u4_start_code == USER_DATA_START_CODE) &&
1607 (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE == e_error &&
1608 (ps_stream->u4_offset < ps_stream->u4_max_offset))
1609 {
1610 if(u4_start_code == USER_DATA_START_CODE)
1611 {
1612 impeg2d_dec_user_data(ps_dec);
1613 }
1614 else
1615 {
1616 impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN);
1617 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,EXT_ID_LEN);
1618 switch(u4_start_code)
1619 {
1620 case QUANT_MATRIX_EXT_ID:
1621 impeg2d_dec_quant_matrix_ext(ps_dec);
1622 break;
1623 case COPYRIGHT_EXT_ID:
1624 impeg2d_dec_copyright_ext(ps_dec);
1625 break;
1626 case PIC_DISPLAY_EXT_ID:
1627 impeg2d_dec_pic_disp_ext(ps_dec);
1628 break;
1629 case CAMERA_PARAM_EXT_ID:
1630 impeg2d_dec_cam_param_ext(ps_dec);
1631 break;
1632 case ITU_T_EXT_ID:
1633 impeg2d_dec_itu_t_ext(ps_dec);
1634 break;
1635 case PIC_SPATIAL_SCALABLE_EXT_ID:
1636 case PIC_TEMPORAL_SCALABLE_EXT_ID:
1637 e_error = IMPEG2D_SCALABLITY_NOT_SUP;
1638 break;
1639 default:
1640 /* In case its a reserved extension code */
1641 impeg2d_bit_stream_flush(ps_stream,EXT_ID_LEN);
1642 impeg2d_next_start_code(ps_dec);
1643 break;
1644 }
1645 }
1646 u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1647 }
1648 return e_error;
1649 }
1650
1651 /*******************************************************************************
1652 *
1653 * Function Name : impeg2d_process_video_header
1654 *
1655 * Description : Processes video sequence header information
1656 *
1657 * Arguments :
1658 * dec : Decoder context
1659 *
1660 * Values Returned : None
1661 *******************************************************************************/
impeg2d_process_video_header(dec_state_t * ps_dec)1662 IMPEG2D_ERROR_CODES_T impeg2d_process_video_header(dec_state_t *ps_dec)
1663 {
1664 stream_t *ps_stream;
1665 ps_stream = &ps_dec->s_bit_stream;
1666 IMPEG2D_ERROR_CODES_T e_error;
1667
1668 impeg2d_next_code(ps_dec, SEQUENCE_HEADER_CODE);
1669 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1670 {
1671 e_error = impeg2d_dec_seq_hdr(ps_dec);
1672 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1673 {
1674 return e_error;
1675 }
1676 }
1677 else
1678 {
1679 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1680 }
1681 if (impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == EXTENSION_START_CODE)
1682 {
1683 /* MPEG2 Decoder */
1684 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1685 {
1686 e_error = impeg2d_dec_seq_ext(ps_dec);
1687 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1688 {
1689 return e_error;
1690 }
1691 }
1692 else
1693 {
1694 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1695 }
1696 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1697 {
1698 e_error = impeg2d_dec_seq_ext_data(ps_dec);
1699 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1700 {
1701 return e_error;
1702 }
1703 }
1704 return impeg2d_init_video_state(ps_dec,MPEG_2_VIDEO);
1705 }
1706 else
1707 {
1708 /* MPEG1 Decoder */
1709 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1710 {
1711 impeg2d_flush_ext_and_user_data(ps_dec);
1712 }
1713 return impeg2d_init_video_state(ps_dec,MPEG_1_VIDEO);
1714 }
1715 }
1716 /*******************************************************************************
1717 *
1718 * Function Name : impeg2d_process_video_bit_stream
1719 *
1720 * Description : Processes video sequence header information
1721 *
1722 * Arguments :
1723 * dec : Decoder context
1724 *
1725 * Values Returned : None
1726 *******************************************************************************/
impeg2d_process_video_bit_stream(dec_state_t * ps_dec)1727 IMPEG2D_ERROR_CODES_T impeg2d_process_video_bit_stream(dec_state_t *ps_dec)
1728 {
1729 stream_t *ps_stream;
1730 UWORD32 u4_next_bits, u4_start_code_found;
1731 IMPEG2D_ERROR_CODES_T e_error;
1732
1733 ps_stream = &ps_dec->s_bit_stream;
1734 impeg2d_next_start_code(ps_dec);
1735 /* If the stream is MPEG-2 compliant stream */
1736 u4_start_code_found = 0;
1737
1738 if(ps_dec->u2_is_mpeg2)
1739 {
1740 /* MPEG2 decoding starts */
1741 while((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
1742 {
1743 u4_next_bits = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1744
1745 if(u4_next_bits == SEQUENCE_HEADER_CODE)
1746 {
1747 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1748 {
1749 e_error = impeg2d_dec_seq_hdr(ps_dec);
1750 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1751 {
1752 return e_error;
1753 }
1754
1755 u4_start_code_found = 0;
1756
1757 }
1758 else
1759 {
1760 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1761 }
1762
1763
1764 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1765 {
1766 IMPEG2D_ERROR_CODES_T e_error;
1767 e_error = impeg2d_dec_seq_ext(ps_dec);
1768 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1769 {
1770 return e_error;
1771 }
1772 u4_start_code_found = 0;
1773
1774 }
1775 else
1776 {
1777 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1778 }
1779 }
1780 else if((u4_next_bits == USER_DATA_START_CODE) || (u4_next_bits == EXTENSION_START_CODE))
1781 {
1782 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1783 {
1784 impeg2d_dec_seq_ext_data(ps_dec);
1785 u4_start_code_found = 0;
1786
1787 }
1788
1789 }
1790 else if((ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1791 && (u4_next_bits == GOP_START_CODE))
1792 {
1793 impeg2d_dec_grp_of_pic_hdr(ps_dec);
1794 impeg2d_dec_user_data(ps_dec);
1795 u4_start_code_found = 0;
1796
1797 }
1798 else if((ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1799 && (u4_next_bits == PICTURE_START_CODE))
1800 {
1801 ps_dec->i4_pic_count++;
1802
1803 e_error = impeg2d_dec_pic_hdr(ps_dec);
1804 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1805 {
1806 return e_error;
1807 }
1808 e_error = impeg2d_dec_pic_coding_ext(ps_dec);
1809 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1810 {
1811 return e_error;
1812 }
1813 e_error = impeg2d_dec_pic_ext_data(ps_dec);
1814 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1815 {
1816 return e_error;
1817 }
1818 e_error = impeg2d_pre_pic_dec_proc(ps_dec);
1819 if ((IMPEG2D_ERROR_CODES_T) IVD_ERROR_NONE != e_error)
1820 {
1821 return e_error;
1822 }
1823 impeg2d_dec_pic_data(ps_dec);
1824 impeg2d_post_pic_dec_proc(ps_dec);
1825 u4_start_code_found = 1;
1826 }
1827 else
1828
1829 {
1830 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);
1831
1832 }
1833 if(u4_start_code_found == 0)
1834 {
1835 impeg2d_next_start_code(ps_dec);
1836 /* In case a dec_pic_data call has not been made, the number of
1837 * bytes consumed in the previous header decode has to be
1838 * consumed. Not consuming it will result in zero bytes consumed
1839 * loops in case there are multiple headers and the second
1840 * or a future header has a resolution change/other error where
1841 * the bytes of the last header are not consumed.
1842 */
1843 ps_dec->i4_bytes_consumed = (ps_dec->s_bit_stream.u4_offset + 7) >> 3;
1844 ps_dec->i4_bytes_consumed -= ((size_t)ps_dec->s_bit_stream.pv_bs_buf & 3);
1845 }
1846 }
1847 if((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset))
1848 {
1849 return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND;
1850 }
1851
1852 }
1853 /* If the stream is MPEG-1 compliant stream */
1854 else
1855 {
1856 while((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
1857 {
1858 u4_next_bits = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN);
1859
1860 if(impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == SEQUENCE_HEADER_CODE)
1861 {
1862 if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)
1863 {
1864 e_error = impeg2d_dec_seq_hdr(ps_dec);
1865 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1866 {
1867 return e_error;
1868 }
1869
1870 u4_start_code_found = 0;
1871 }
1872 else
1873 {
1874 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
1875 }
1876 }
1877 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))
1878 {
1879 impeg2d_flush_ext_and_user_data(ps_dec);
1880 u4_start_code_found = 0;
1881 }
1882
1883
1884 else if ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == GOP_START_CODE)
1885 && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
1886 {
1887 impeg2d_dec_grp_of_pic_hdr(ps_dec);
1888 impeg2d_flush_ext_and_user_data(ps_dec);
1889 u4_start_code_found = 0;
1890 }
1891 else if ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == PICTURE_START_CODE)
1892 && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset))
1893 {
1894 ps_dec->i4_pic_count++;
1895
1896 e_error = impeg2d_dec_pic_hdr(ps_dec);
1897 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1898 {
1899 return e_error;
1900 }
1901 impeg2d_flush_ext_and_user_data(ps_dec);
1902 e_error = impeg2d_pre_pic_dec_proc(ps_dec);
1903 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
1904 {
1905 return e_error;
1906 }
1907 impeg2d_dec_pic_data(ps_dec);
1908 impeg2d_post_pic_dec_proc(ps_dec);
1909 u4_start_code_found = 1;
1910 }
1911 else
1912 {
1913 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);
1914 }
1915 impeg2d_next_start_code(ps_dec);
1916 if (0 == u4_start_code_found)
1917 {
1918 /* In case a dec_pic_data call has not been made, the number of
1919 * bytes consumed in the previous header decode has to be
1920 * consumed. Not consuming it will result in zero bytes consumed
1921 * loops in case there are multiple headers and the second
1922 * or a future header has a resolution change/other error where
1923 * the bytes of the last header are not consumed.
1924 */
1925 ps_dec->i4_bytes_consumed = (ps_dec->s_bit_stream.u4_offset + 7) >> 3;
1926 ps_dec->i4_bytes_consumed -= ((size_t)ps_dec->s_bit_stream.pv_bs_buf & 3);
1927 }
1928 }
1929 if((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset))
1930 {
1931 return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND;
1932 }
1933 }
1934
1935 return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
1936 }
1937