1 /*****************************************************************************
2 * vpar_headers.c : headers parsing
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: vpar_headers.c,v 1.1 2001/11/13 12:09:18 henri Exp $
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Stéphane Borel <stef@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
30 #include <stdlib.h> /* free() */
31 #include <string.h> /* memcpy(), memset() */
40 #include "video_output.h"
42 #include "modules_export.h"
43 #include "stream_control.h"
44 #include "input_ext-dec.h"
47 #include "vdec_ext-plugins.h"
48 #include "vpar_pool.h"
49 #include "video_parser.h"
50 #include "video_decoder.h"
55 static __inline__ void NextStartCode( bit_stream_t * );
56 static void SequenceHeader( vpar_thread_t * p_vpar );
57 static void GroupHeader( vpar_thread_t * p_vpar );
58 static void PictureHeader( vpar_thread_t * p_vpar );
59 static void ExtensionAndUserData( vpar_thread_t * p_vpar );
60 static void QuantMatrixExtension( vpar_thread_t * p_vpar );
61 static void SequenceScalableExtension( vpar_thread_t * p_vpar );
62 static void SequenceDisplayExtension( vpar_thread_t * p_vpar );
63 static void PictureDisplayExtension( vpar_thread_t * p_vpar );
64 static void PictureSpatialScalableExtension( vpar_thread_t * p_vpar );
65 static void PictureTemporalScalableExtension( vpar_thread_t * p_vpar );
66 static void CopyrightExtension( vpar_thread_t * p_vpar );
72 /*****************************************************************************
73 * pi_default_intra_quant : default quantization matrix
74 *****************************************************************************/
75 u8 pi_default_intra_quant[] ATTR_ALIGN(16) =
77 8, 16, 19, 22, 26, 27, 29, 34,
78 16, 16, 22, 24, 27, 29, 34, 37,
79 19, 22, 26, 27, 29, 34, 34, 38,
80 22, 22, 26, 27, 29, 34, 37, 40,
81 22, 26, 27, 29, 32, 35, 40, 48,
82 26, 27, 29, 32, 35, 40, 48, 58,
83 26, 27, 29, 34, 38, 46, 56, 69,
84 27, 29, 35, 38, 46, 56, 69, 83
87 /*****************************************************************************
88 * pi_default_nonintra_quant : default quantization matrix
89 *****************************************************************************/
90 u8 pi_default_nonintra_quant[] ATTR_ALIGN(16) =
92 16, 16, 16, 16, 16, 16, 16, 16,
93 16, 16, 16, 16, 16, 16, 16, 16,
94 16, 16, 16, 16, 16, 16, 16, 16,
95 16, 16, 16, 16, 16, 16, 16, 16,
96 16, 16, 16, 16, 16, 16, 16, 16,
97 16, 16, 16, 16, 16, 16, 16, 16,
98 16, 16, 16, 16, 16, 16, 16, 16,
99 16, 16, 16, 16, 16, 16, 16, 16
102 /*****************************************************************************
103 * pi_scan : zig-zag and alternate scan patterns
104 *****************************************************************************/
105 u8 pi_scan[2][64] ATTR_ALIGN(16) =
107 { /* Zig-Zag pattern */
108 0,1,8,16,9,2,3,10,17,24,32,25,18,11,4,5,
109 12,19,26,33,40,48,41,34,27,20,13,6,7,14,21,28,
110 35,42,49,56,57,50,43,36,29,22,15,23,30,37,44,51,
111 58,59,52,45,38,31,39,46,53,60,61,54,47,55,62,63
113 { /* Alternate scan pattern */
114 0,8,16,24,1,9,2,10,17,25,32,40,48,56,57,49,
115 41,33,26,18,3,11,4,12,19,27,34,42,50,58,35,43,
116 51,59,20,28,5,13,6,14,21,29,36,44,52,60,37,45,
117 53,61,22,30,7,15,23,31,38,46,54,62,39,47,55,63
122 * Local inline functions.
125 /*****************************************************************************
126 * ReferenceUpdate : Update the reference pointers when we have a new picture
127 *****************************************************************************/
128 static void __inline__ ReferenceUpdate( vpar_thread_t * p_vpar,
130 picture_t * p_newref )
132 if( i_coding_type != B_CODING_TYPE )
134 if( p_vpar->sequence.p_forward != NULL )
136 vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
138 if( p_vpar->sequence.p_backward != NULL )
140 vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
141 vpar_SynchroDate( p_vpar ) );
143 p_vpar->sequence.p_forward = p_vpar->sequence.p_backward;
144 p_vpar->sequence.p_backward = p_newref;
145 if( p_newref != NULL )
147 vout_LinkPicture( p_vpar->p_vout, p_newref );
150 else if( p_newref != NULL )
152 /* Put date immediately. */
153 vout_DatePicture( p_vpar->p_vout, p_newref, vpar_SynchroDate(p_vpar) );
157 /*****************************************************************************
158 * ReferenceReplace : Replace the last reference pointer when we destroy
160 *****************************************************************************/
161 static void __inline__ ReferenceReplace( vpar_thread_t * p_vpar,
163 picture_t * p_newref )
165 if( i_coding_type != B_CODING_TYPE )
167 if( p_vpar->sequence.p_backward != NULL )
169 vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
171 p_vpar->sequence.p_backward = p_newref;
172 if( p_newref != NULL )
174 vout_LinkPicture( p_vpar->p_vout, p_newref );
179 /*****************************************************************************
180 * LoadMatrix : Load a quantization matrix
181 *****************************************************************************/
182 static __inline__ void LoadMatrix( vpar_thread_t * p_vpar,
183 quant_matrix_t * p_matrix )
187 if( !p_matrix->b_allocated )
189 /* Allocate a piece of memory to load the matrix. */
190 if( (p_matrix->pi_matrix = (u8 *)malloc( 64*sizeof(u8) )) == NULL )
192 intf_ErrMsg( "vpar error: allocation error in LoadMatrix()" );
193 p_vpar->p_fifo->b_error = 1;
196 p_matrix->b_allocated = 1;
199 for( i_dummy = 0; i_dummy < 64; i_dummy++ )
201 p_matrix->pi_matrix[p_vpar->ppi_scan[0][i_dummy]]
202 = GetBits( &p_vpar->bit_stream, 8 );
206 /*****************************************************************************
207 * LinkMatrix : Link a quantization matrix to another
208 *****************************************************************************/
209 static __inline__ void LinkMatrix( quant_matrix_t * p_matrix, u8 * pi_array )
211 if( p_matrix->b_allocated )
213 /* Deallocate the piece of memory. */
214 free( p_matrix->pi_matrix );
215 p_matrix->b_allocated = 0;
218 p_matrix->pi_matrix = pi_array;
222 * Exported functions.
225 /*****************************************************************************
226 * vpar_NextSequenceHeader : Find the next sequence header
227 *****************************************************************************/
228 int vpar_NextSequenceHeader( vpar_thread_t * p_vpar )
230 while( !p_vpar->p_fifo->b_die )
232 NextStartCode( &p_vpar->bit_stream );
233 if( ShowBits( &p_vpar->bit_stream, 32 ) == SEQUENCE_HEADER_CODE )
237 RemoveBits( &p_vpar->bit_stream, 8 );
242 /*****************************************************************************
243 * vpar_ParseHeader : Parse the next header
244 *****************************************************************************/
245 int vpar_ParseHeader( vpar_thread_t * p_vpar )
247 while( !p_vpar->p_fifo->b_die )
249 NextStartCode( &p_vpar->bit_stream );
250 switch( GetBits32( &p_vpar->bit_stream ) )
252 case SEQUENCE_HEADER_CODE:
253 p_vpar->c_sequences++;
255 SequenceHeader( p_vpar );
259 case GROUP_START_CODE:
260 GroupHeader( p_vpar );
264 case PICTURE_START_CODE:
265 PictureHeader( p_vpar );
269 case SEQUENCE_END_CODE:
270 intf_DbgMsg("vpar debug: sequence end code received");
283 * Following functions are local
286 /*****************************************************************************
287 * SequenceHeader : Parse the next sequence header
288 *****************************************************************************/
289 static void SequenceHeader( vpar_thread_t * p_vpar )
292 static int i_frame_rate_table[16] =
303 RESERVED, RESERVED, RESERVED, RESERVED, RESERVED, RESERVED, RESERVED
307 int i_height_save, i_width_save;
309 i_height_save = p_vpar->sequence.i_height;
310 i_width_save = p_vpar->sequence.i_width;
312 p_vpar->sequence.i_width = GetBits( &p_vpar->bit_stream, 12 );
313 p_vpar->sequence.i_height = GetBits( &p_vpar->bit_stream, 12 );
314 p_vpar->sequence.i_aspect_ratio = GetBits( &p_vpar->bit_stream, 4 );
315 p_vpar->sequence.i_frame_rate =
316 i_frame_rate_table[ GetBits( &p_vpar->bit_stream, 4 ) ];
318 /* We don't need bit_rate_value, marker_bit, vbv_buffer_size,
319 * constrained_parameters_flag */
320 RemoveBits( &p_vpar->bit_stream, 30 );
323 * Quantization matrices
325 if( GetBits( &p_vpar->bit_stream, 1 ) ) /* load_intra_quantizer_matrix */
327 LoadMatrix( p_vpar, &p_vpar->sequence.intra_quant );
331 /* Use default matrix. */
332 LinkMatrix( &p_vpar->sequence.intra_quant,
333 p_vpar->pi_default_intra_quant );
336 if( GetBits(&p_vpar->bit_stream, 1) ) /* load_non_intra_quantizer_matrix */
338 LoadMatrix( p_vpar, &p_vpar->sequence.nonintra_quant );
342 /* Use default matrix. */
343 LinkMatrix( &p_vpar->sequence.nonintra_quant,
344 p_vpar->pi_default_nonintra_quant );
347 /* Unless later overwritten by a matrix extension, we have the same
348 * matrices for luminance and chrominance. */
349 LinkMatrix( &p_vpar->sequence.chroma_intra_quant,
350 p_vpar->sequence.intra_quant.pi_matrix );
351 LinkMatrix( &p_vpar->sequence.chroma_nonintra_quant,
352 p_vpar->sequence.nonintra_quant.pi_matrix );
357 NextStartCode( &p_vpar->bit_stream );
358 if( ShowBits( &p_vpar->bit_stream, 32 ) == EXTENSION_START_CODE )
362 /* Turn the MPEG2 flag on */
363 p_vpar->sequence.b_mpeg2 = 1;
365 /* Parse sequence_extension */
366 RemoveBits32( &p_vpar->bit_stream );
367 /* extension_start_code_identifier, profile_and_level_indication */
368 RemoveBits( &p_vpar->bit_stream, 12 );
369 p_vpar->sequence.b_progressive = GetBits( &p_vpar->bit_stream, 1 );
370 p_vpar->sequence.i_chroma_format = GetBits( &p_vpar->bit_stream, 2 );
371 p_vpar->sequence.i_width |= GetBits( &p_vpar->bit_stream, 2 ) << 12;
372 p_vpar->sequence.i_height |= GetBits( &p_vpar->bit_stream, 2 ) << 12;
373 /* bit_rate_extension, marker_bit, vbv_buffer_size_extension,
375 RemoveBits( &p_vpar->bit_stream, 22 );
376 /* frame_rate_extension_n */
377 i_dummy = GetBits( &p_vpar->bit_stream, 2 );
378 /* frame_rate_extension_d */
379 p_vpar->sequence.i_frame_rate *= (i_dummy + 1)
380 / (GetBits( &p_vpar->bit_stream, 5 ) + 1);
384 /* It's an MPEG-1 stream. Put adequate parameters. */
386 p_vpar->sequence.b_mpeg2 = 0;
387 p_vpar->sequence.b_progressive = 1;
388 p_vpar->sequence.i_chroma_format = CHROMA_420;
392 p_vpar->sequence.i_mb_width = (p_vpar->sequence.i_width + 15) / 16;
393 p_vpar->sequence.i_mb_height = (p_vpar->sequence.b_progressive) ?
394 (p_vpar->sequence.i_height + 15) / 16 :
395 2 * ((p_vpar->sequence.i_height + 31) / 32);
396 p_vpar->sequence.i_mb_size = p_vpar->sequence.i_mb_width
397 * p_vpar->sequence.i_mb_height;
398 p_vpar->sequence.i_width = (p_vpar->sequence.i_mb_width * 16);
399 p_vpar->sequence.i_height = (p_vpar->sequence.i_mb_height * 16);
400 p_vpar->sequence.i_size = p_vpar->sequence.i_width
401 * p_vpar->sequence.i_height;
402 switch( p_vpar->sequence.i_chroma_format )
405 p_vpar->sequence.i_chroma_nb_blocks = 2;
406 p_vpar->sequence.b_chroma_h_subsampled = 1;
407 p_vpar->sequence.b_chroma_v_subsampled = 1;
410 p_vpar->sequence.i_chroma_nb_blocks = 4;
411 p_vpar->sequence.b_chroma_h_subsampled = 1;
412 p_vpar->sequence.b_chroma_v_subsampled = 0;
415 p_vpar->sequence.i_chroma_nb_blocks = 6;
416 p_vpar->sequence.b_chroma_h_subsampled = 0;
417 p_vpar->sequence.b_chroma_v_subsampled = 0;
422 if( p_vpar->sequence.i_width != i_width_save
423 || p_vpar->sequence.i_height != i_height_save )
425 /* FIXME: Warn the video output */
429 /* Extension and User data */
430 ExtensionAndUserData( p_vpar );
432 /* XXX: The vout request and fifo opening will eventually be here */
434 /* Spawn a video output if there is none */
435 vlc_mutex_lock( &p_vout_bank->lock );
437 if( p_vout_bank->i_count == 0 )
439 intf_WarnMsg( 1, "vpar: no vout present, spawning one" );
441 p_vpar->p_vout = vout_CreateThread( NULL, p_vpar->sequence.i_width,
442 p_vpar->sequence.i_height );
444 /* Everything failed */
445 if( p_vpar->p_vout == NULL )
447 intf_ErrMsg( "vpar error: can't open vout, aborting" );
448 vlc_mutex_unlock( &p_vout_bank->lock );
450 /* XXX ! XXX ! XXX ! what to do here ? */
454 p_vout_bank->pp_vout[ p_vout_bank->i_count ] = p_vpar->p_vout;
455 p_vout_bank->i_count++;
459 /* Take the first video output FIXME: take the best one */
460 p_vpar->p_vout = p_vout_bank->pp_vout[ 0 ];
463 vlc_mutex_unlock( &p_vout_bank->lock );
466 /*****************************************************************************
467 * GroupHeader : Parse the next group of pictures header
468 *****************************************************************************/
469 static void GroupHeader( vpar_thread_t * p_vpar )
471 /* Nothing to do, we don't care. */
472 RemoveBits( &p_vpar->bit_stream, 27 );
473 ExtensionAndUserData( p_vpar );
476 /*****************************************************************************
477 * PictureHeader : Parse the next picture header
478 *****************************************************************************/
479 static void PictureHeader( vpar_thread_t * p_vpar )
481 int i_structure, i_previous_coding_type;
482 boolean_t b_parsable = 0;
484 /* Recover in case of stream discontinuity. */
485 if( p_vpar->sequence.b_expect_discontinuity )
487 ReferenceUpdate( p_vpar, I_CODING_TYPE, NULL );
488 ReferenceUpdate( p_vpar, I_CODING_TYPE, NULL );
489 if( p_vpar->picture.p_picture != NULL )
491 vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
492 p_vpar->picture.p_picture = NULL;
494 p_vpar->picture.i_current_structure = 0;
495 p_vpar->sequence.b_expect_discontinuity = 0;
498 /* Parse the picture header. */
499 RemoveBits( &p_vpar->bit_stream, 10 ); /* temporal_reference */
500 i_previous_coding_type = p_vpar->picture.i_coding_type;
501 p_vpar->picture.i_coding_type = GetBits( &p_vpar->bit_stream, 3 );
502 RemoveBits( &p_vpar->bit_stream, 16 ); /* vbv_delay */
504 if( p_vpar->picture.i_coding_type == P_CODING_TYPE
505 || p_vpar->picture.i_coding_type == B_CODING_TYPE )
507 p_vpar->picture.ppi_f_code[0][1] = GetBits( &p_vpar->bit_stream, 1 );
508 p_vpar->picture.ppi_f_code[0][0] = GetBits( &p_vpar->bit_stream, 3 )
511 if( p_vpar->picture.i_coding_type == B_CODING_TYPE )
513 p_vpar->picture.ppi_f_code[1][1] = GetBits( &p_vpar->bit_stream, 1 );
514 p_vpar->picture.ppi_f_code[1][0] = GetBits( &p_vpar->bit_stream, 3 )
518 /* extra_information_picture */
519 while( GetBits( &p_vpar->bit_stream, 1 ) )
521 RemoveBits( &p_vpar->bit_stream, 8 );
525 * Picture Coding Extension
527 NextStartCode( &p_vpar->bit_stream );
528 if( ShowBits( &p_vpar->bit_stream, 32 ) == EXTENSION_START_CODE )
530 /* Parse picture_coding_extension */
531 RemoveBits32( &p_vpar->bit_stream );
532 /* extension_start_code_identifier */
533 RemoveBits( &p_vpar->bit_stream, 4 );
535 /* Pre-substract 1 for later use in MotionDelta(). */
536 p_vpar->picture.ppi_f_code[0][0] = GetBits( &p_vpar->bit_stream, 4 ) -1;
537 p_vpar->picture.ppi_f_code[0][1] = GetBits( &p_vpar->bit_stream, 4 ) -1;
538 p_vpar->picture.ppi_f_code[1][0] = GetBits( &p_vpar->bit_stream, 4 ) -1;
539 p_vpar->picture.ppi_f_code[1][1] = GetBits( &p_vpar->bit_stream, 4 ) -1;
540 p_vpar->picture.i_intra_dc_precision = GetBits( &p_vpar->bit_stream, 2 );
541 i_structure = GetBits( &p_vpar->bit_stream, 2 );
542 p_vpar->picture.b_top_field_first = GetBits( &p_vpar->bit_stream, 1 );
543 p_vpar->picture.b_frame_pred_frame_dct
544 = GetBits( &p_vpar->bit_stream, 1 );
545 p_vpar->picture.b_concealment_mv = GetBits( &p_vpar->bit_stream, 1 );
546 p_vpar->picture.b_q_scale_type = GetBits( &p_vpar->bit_stream, 1 );
547 p_vpar->picture.b_intra_vlc_format = GetBits( &p_vpar->bit_stream, 1 );
549 p_vpar->picture.pi_scan =
550 p_vpar->ppi_scan[ GetBits( &p_vpar->bit_stream, 1 ) ];
551 p_vpar->picture.b_repeat_first_field = GetBits( &p_vpar->bit_stream, 1 );
552 /* chroma_420_type (obsolete) */
553 RemoveBits( &p_vpar->bit_stream, 1 );
554 p_vpar->picture.b_progressive = GetBits( &p_vpar->bit_stream, 1 );
556 /* composite_display_flag */
557 if( GetBits( &p_vpar->bit_stream, 1 ) )
559 /* v_axis, field_sequence, sub_carrier, burst_amplitude,
560 * sub_carrier_phase */
561 RemoveBits( &p_vpar->bit_stream, 20 );
566 /* MPEG-1 compatibility flags */
567 p_vpar->picture.i_intra_dc_precision = 0; /* 8 bits */
568 i_structure = FRAME_STRUCTURE;
569 p_vpar->picture.b_top_field_first = 0;
570 p_vpar->picture.b_frame_pred_frame_dct = 1;
571 p_vpar->picture.b_concealment_mv = 0;
572 p_vpar->picture.b_q_scale_type = 0;
573 p_vpar->picture.b_intra_vlc_format = 0;
574 p_vpar->picture.pi_scan = p_vpar->ppi_scan[0];
575 p_vpar->picture.b_repeat_first_field = 0;
576 p_vpar->picture.b_progressive = 1;
579 /* Extension and User data. */
580 ExtensionAndUserData( p_vpar );
582 p_vpar->pc_pictures[p_vpar->picture.i_coding_type]++;
584 if( p_vpar->picture.i_current_structure )
586 if ( (i_structure == FRAME_STRUCTURE ||
587 i_structure == p_vpar->picture.i_current_structure) )
589 /* We don't have the second field of the buffered frame. */
590 if( p_vpar->picture.p_picture != NULL )
592 ReferenceReplace( p_vpar,
593 p_vpar->picture.i_coding_type,
595 vout_DestroyPicture( p_vpar->p_vout,
596 p_vpar->picture.p_picture );
597 p_vpar->picture.p_picture = NULL;
600 p_vpar->picture.i_current_structure = 0;
602 intf_WarnMsg( 2, "Odd number of field pictures." );
606 /* Second field of a frame. We will decode it if, and only if we
607 * have decoded the first field. */
608 if( p_vpar->picture.p_picture == NULL )
610 if( (p_vpar->picture.i_coding_type == I_CODING_TYPE
611 && p_vpar->sequence.p_backward == NULL) )
613 /* Exceptionnally, parse the picture if it is I. We need
614 * this in case of an odd number of field pictures, if the
615 * previous picture is not intra, we desperately need a
616 * new reference picture. OK, this is kind of kludgy. */
617 p_vpar->picture.i_current_structure = 0;
626 /* We suppose we have the reference pictures, since we already
627 * decoded the first field and the second field will not need
628 * any extra reference picture. There is a special case of
629 * P field being the second field of an I field, but ISO/IEC
630 * 13818-2 section 7.6.3.5 specifies that this P field will
631 * not need any reference picture besides the I field. So far
635 if( p_vpar->picture.i_coding_type == P_CODING_TYPE &&
636 i_previous_coding_type == I_CODING_TYPE &&
637 p_vpar->sequence.p_forward == NULL )
639 /* This is the special case of section 7.6.3.5. Create
640 * a fake reference picture (which will not be used)
641 * but will prevent us from segfaulting in the slice
643 static picture_t fake_picture;
644 fake_picture.p_data = NULL; /* We will use it later */
645 p_vpar->sequence.p_forward = &fake_picture;
651 if( !p_vpar->picture.i_current_structure )
653 /* First field of a frame, or new frame picture. */
656 /* Do we have the reference pictures ? */
657 b_parsable = !(((p_vpar->picture.i_coding_type == P_CODING_TYPE ||
658 p_vpar->picture.b_concealment_mv) &&
659 (p_vpar->sequence.p_backward == NULL)) ||
660 /* p_backward will become p_forward later */
661 ((p_vpar->picture.i_coding_type == B_CODING_TYPE) &&
662 (p_vpar->sequence.p_forward == NULL ||
663 p_vpar->sequence.p_backward == NULL)));
665 /* Compute the number of times the frame will be emitted by the
666 * decoder (number of half-periods). */
667 if( p_vpar->sequence.b_progressive )
669 i_repeat_field = (1 + p_vpar->picture.b_repeat_first_field
670 + p_vpar->picture.b_top_field_first) * 2;
674 if( p_vpar->picture.b_progressive )
676 i_repeat_field = 2 + p_vpar->picture.b_repeat_first_field;
684 /* Warn synchro we have a new picture (updates pictures index). */
685 vpar_SynchroNewPicture( p_vpar, p_vpar->picture.i_coding_type,
690 /* Does synchro say we have enough time to decode it ? */
691 b_parsable = vpar_SynchroChoose( p_vpar,
692 p_vpar->picture.i_coding_type, i_structure );
698 /* Update the reference pointers. */
699 ReferenceUpdate( p_vpar, p_vpar->picture.i_coding_type, NULL );
701 /* Update context. */
702 if( i_structure != FRAME_STRUCTURE )
704 if( (p_vpar->picture.i_current_structure | i_structure)
707 /* The frame is complete. */
708 p_vpar->picture.i_current_structure = 0;
710 vpar_SynchroTrash( p_vpar, p_vpar->picture.i_coding_type, i_structure );
714 p_vpar->picture.i_current_structure = i_structure;
719 /* Warn Synchro we have trashed a picture. */
720 vpar_SynchroTrash( p_vpar, p_vpar->picture.i_coding_type, i_structure );
722 p_vpar->picture.p_picture = NULL;
727 /* OK, now we are sure we will decode the picture. */
728 p_vpar->pc_decoded_pictures[p_vpar->picture.i_coding_type]++;
730 #define P_picture p_vpar->picture.p_picture
731 p_vpar->picture.b_error = 0;
732 p_vpar->picture.b_frame_structure = (i_structure == FRAME_STRUCTURE);
734 if( !p_vpar->picture.i_current_structure )
736 /* This is a new frame. Get a structure from the video_output. */
737 while( ( P_picture = vout_CreatePicture( p_vpar->p_vout,
738 /* XXX */ 99+p_vpar->sequence.i_chroma_format,
739 p_vpar->sequence.i_width,
740 p_vpar->sequence.i_height ) )
743 intf_DbgMsg("vpar debug: allocation error in vout_CreatePicture, delaying");
744 if( p_vpar->p_fifo->b_die || p_vpar->p_fifo->b_error )
748 msleep( VPAR_OUTMEM_SLEEP );
751 /* Initialize values. */
752 vpar_SynchroDecode( p_vpar, p_vpar->picture.i_coding_type, i_structure );
753 P_picture->i_aspect_ratio = p_vpar->sequence.i_aspect_ratio;
754 P_picture->i_matrix_coefficients = p_vpar->sequence.i_matrix_coefficients;
755 p_vpar->picture.i_field_width = ( p_vpar->sequence.i_width
756 << ( 1 - p_vpar->picture.b_frame_structure ) );
758 /* FIXME ! remove asap ?? */
759 //memset( P_picture->p_data, 0, (p_vpar->sequence.i_mb_size*384));
761 /* Update the reference pointers. */
762 ReferenceUpdate( p_vpar, p_vpar->picture.i_coding_type, P_picture );
765 /* Initialize picture data for decoding. */
766 p_vpar->picture.i_current_structure |= i_structure;
767 p_vpar->picture.i_structure = i_structure;
768 p_vpar->picture.b_second_field =
769 (i_structure != p_vpar->picture.i_current_structure);
770 p_vpar->picture.b_current_field =
771 (i_structure == BOTTOM_FIELD );
773 if( !p_vpar->p_config->p_stream_ctrl->b_grayscale )
775 switch( p_vpar->sequence.i_chroma_format )
778 p_vpar->pool.pf_vdec_decode = vdec_DecodeMacroblock422;
781 p_vpar->pool.pf_vdec_decode = vdec_DecodeMacroblock444;
785 p_vpar->pool.pf_vdec_decode = vdec_DecodeMacroblock420;
791 p_vpar->pool.pf_vdec_decode = vdec_DecodeMacroblockBW;
795 if( p_vpar->sequence.b_mpeg2 )
797 static f_picture_data_t ppf_picture_data[4][4] =
800 NULL, NULL, NULL, NULL
804 #if (VPAR_OPTIM_LEVEL > 1)
805 NULL, vpar_PictureData2IT, vpar_PictureData2PT,
808 NULL, vpar_PictureDataGENERIC, vpar_PictureDataGENERIC,
809 vpar_PictureDataGENERIC
814 #if (VPAR_OPTIM_LEVEL > 1)
815 NULL, vpar_PictureData2IB, vpar_PictureData2PB,
818 NULL, vpar_PictureDataGENERIC, vpar_PictureDataGENERIC,
819 vpar_PictureDataGENERIC
824 #if (VPAR_OPTIM_LEVEL > 0)
825 NULL, vpar_PictureData2IF, vpar_PictureData2PF,
828 NULL, vpar_PictureDataGENERIC, vpar_PictureDataGENERIC,
829 vpar_PictureDataGENERIC
834 ppf_picture_data[p_vpar->picture.i_structure]
835 [p_vpar->picture.i_coding_type]( p_vpar );
839 #if (VPAR_OPTIM_LEVEL > 1)
840 static f_picture_data_t pf_picture_data[5] =
841 { NULL, vpar_PictureData1I, vpar_PictureData1P, vpar_PictureData1B,
842 vpar_PictureData1D };
844 pf_picture_data[p_vpar->picture.i_coding_type]( p_vpar );
846 vpar_PictureDataGENERIC( p_vpar );
850 /* Wait for all the macroblocks to be decoded. */
851 p_vpar->pool.pf_wait_pool( &p_vpar->pool );
853 /* Re-spawn decoder threads if the user changed settings. */
854 vpar_SpawnPool( p_vpar );
856 if( p_vpar->p_fifo->b_die || p_vpar->p_fifo->b_error )
861 if( p_vpar->sequence.p_forward != NULL &&
862 p_vpar->sequence.p_forward->p_data == NULL )
864 /* This can only happen with the fake picture created for section
865 * 7.6.3.5. Clean up our mess. */
866 p_vpar->sequence.p_forward = NULL;
869 if( p_vpar->picture.b_error )
872 p_vpar->pc_malformed_pictures[p_vpar->picture.i_coding_type]++;
874 vpar_SynchroEnd( p_vpar, p_vpar->picture.i_coding_type,
875 p_vpar->picture.i_structure, 1 );
876 vout_DestroyPicture( p_vpar->p_vout, P_picture );
878 ReferenceReplace( p_vpar, p_vpar->picture.i_coding_type, NULL );
880 /* Prepare context for the next picture. */
882 if( p_vpar->picture.i_current_structure == FRAME_STRUCTURE )
883 p_vpar->picture.i_current_structure = 0;
885 else if( p_vpar->picture.i_current_structure == FRAME_STRUCTURE )
887 /* Frame completely parsed. */
888 vpar_SynchroEnd( p_vpar, p_vpar->picture.i_coding_type,
889 p_vpar->picture.i_structure, 0 );
890 vout_DisplayPicture( p_vpar->p_vout, P_picture );
892 /* Prepare context for the next picture. */
894 p_vpar->picture.i_current_structure = 0;
899 /*****************************************************************************
900 * ExtensionAndUserData : Parse the extension_and_user_data structure
901 *****************************************************************************/
902 static void ExtensionAndUserData( vpar_thread_t * p_vpar )
904 while( !p_vpar->p_fifo->b_die )
906 NextStartCode( &p_vpar->bit_stream );
907 switch( ShowBits( &p_vpar->bit_stream, 32 ) )
909 case EXTENSION_START_CODE:
910 RemoveBits32( &p_vpar->bit_stream );
911 switch( GetBits( &p_vpar->bit_stream, 4 ) )
913 case SEQUENCE_DISPLAY_EXTENSION_ID:
914 SequenceDisplayExtension( p_vpar );
916 case QUANT_MATRIX_EXTENSION_ID:
917 QuantMatrixExtension( p_vpar );
919 case SEQUENCE_SCALABLE_EXTENSION_ID:
920 SequenceScalableExtension( p_vpar );
922 case PICTURE_DISPLAY_EXTENSION_ID:
923 PictureDisplayExtension( p_vpar );
925 case PICTURE_SPATIAL_SCALABLE_EXTENSION_ID:
926 PictureSpatialScalableExtension( p_vpar );
928 case PICTURE_TEMPORAL_SCALABLE_EXTENSION_ID:
929 PictureTemporalScalableExtension( p_vpar );
931 case COPYRIGHT_EXTENSION_ID:
932 CopyrightExtension( p_vpar );
939 case USER_DATA_START_CODE:
940 RemoveBits32( &p_vpar->bit_stream );
941 /* Wait for the next start code */
951 /*****************************************************************************
952 * SequenceDisplayExtension : Parse the sequence_display_extension structure *
953 *****************************************************************************/
955 static void SequenceDisplayExtension( vpar_thread_t * p_vpar )
957 /* We don't care sequence_display_extension. */
959 RemoveBits( &p_vpar->bit_stream, 3 );
960 if( GetBits( &p_vpar->bit_stream, 1 ) )
962 /* Two bytes for color_desciption */
963 RemoveBits( &p_vpar->bit_stream, 16 );
964 p_vpar->sequence.i_matrix_coefficients = GetBits( &p_vpar->bit_stream, 8 );
966 /* display_horizontal and vertical_size and a marker_bit */
967 RemoveBits( &p_vpar->bit_stream, 29 );
971 /*****************************************************************************
972 * QuantMatrixExtension : Load quantization matrices for luminance *
974 *****************************************************************************/
976 static void QuantMatrixExtension( vpar_thread_t * p_vpar )
978 if( GetBits( &p_vpar->bit_stream, 1 ) )
980 /* Load intra_quantiser_matrix for luminance. */
981 LoadMatrix( p_vpar, &p_vpar->sequence.intra_quant );
985 /* Use the default matrix. */
986 LinkMatrix( &p_vpar->sequence.intra_quant,
987 p_vpar->pi_default_intra_quant );
989 if( GetBits( &p_vpar->bit_stream, 1 ) )
991 /* Load non_intra_quantiser_matrix for luminance. */
992 LoadMatrix( p_vpar, &p_vpar->sequence.nonintra_quant );
996 /* Use the default matrix. */
997 LinkMatrix( &p_vpar->sequence.nonintra_quant,
998 p_vpar->pi_default_nonintra_quant );
1000 if( GetBits( &p_vpar->bit_stream, 1 ) )
1002 /* Load intra_quantiser_matrix for chrominance. */
1003 LoadMatrix( p_vpar, &p_vpar->sequence.chroma_intra_quant );
1007 /* Link the chrominance intra matrix to the luminance one. */
1008 LinkMatrix( &p_vpar->sequence.chroma_intra_quant,
1009 p_vpar->sequence.intra_quant.pi_matrix );
1011 if( GetBits( &p_vpar->bit_stream, 1 ) )
1013 /* Load non_intra_quantiser_matrix for chrominance. */
1014 LoadMatrix( p_vpar, &p_vpar->sequence.chroma_nonintra_quant );
1018 /* Link the chrominance intra matrix to the luminance one. */
1019 LinkMatrix( &p_vpar->sequence.chroma_intra_quant,
1020 p_vpar->sequence.intra_quant.pi_matrix );
1022 if( GetBits( &p_vpar->bit_stream, 1 ) )
1024 /* Load non_intra_quantiser_matrix for chrominance. */
1025 LoadMatrix( p_vpar, &p_vpar->sequence.chroma_nonintra_quant );
1029 /* Link the chrominance nonintra matrix to the luminance one. */
1030 LinkMatrix( &p_vpar->sequence.chroma_nonintra_quant,
1031 p_vpar->sequence.nonintra_quant.pi_matrix );
1036 /*****************************************************************************
1037 * SequenceScalableExtension : Parse the sequence_scalable_extension *
1038 * structure to handle scalable coding *
1039 *****************************************************************************/
1041 static void SequenceScalableExtension( vpar_thread_t * p_vpar )
1043 /* We don't care about anything scalable except the scalable mode. */
1044 switch( p_vpar->sequence.i_scalable_mode = GetBits( &p_vpar->bit_stream, 2 ) )
1045 /* The length of the structure depends on the value of the scalable_mode */
1048 RemoveBits32( &p_vpar->bit_stream );
1049 RemoveBits( &p_vpar->bit_stream, 21 );
1052 RemoveBits( &p_vpar->bit_stream, 12 );
1055 RemoveBits( &p_vpar->bit_stream, 4 );
1059 /*****************************************************************************
1060 * PictureDisplayExtension : Parse the picture_display_extension structure *
1061 *****************************************************************************/
1063 static void PictureDisplayExtension( vpar_thread_t * p_vpar )
1065 /* Number of frame center offset */
1067 /* I am not sure it works but it should
1068 (fewer tests than shown in §6.3.12) */
1069 i_nb = p_vpar->sequence.b_progressive ? p_vpar->sequence.b_progressive +
1070 p_vpar->picture.b_repeat_first_field +
1071 p_vpar->picture.b_top_field_first
1072 : ( p_vpar->picture.b_frame_structure + 1 ) +
1073 p_vpar->picture.b_repeat_first_field;
1074 for( i_dummy = 0; i_dummy < i_nb; i_dummy++ )
1076 RemoveBits( &p_vpar->bit_stream, 17 );
1077 RemoveBits( &p_vpar->bit_stream, 17 );
1082 /*****************************************************************************
1083 * PictureSpatialScalableExtension *
1084 *****************************************************************************/
1086 static void PictureSpatialScalableExtension( vpar_thread_t * p_vpar )
1088 /* That's scalable, so we trash it */
1089 RemoveBits32( &p_vpar->bit_stream );
1090 RemoveBits( &p_vpar->bit_stream, 16 );
1094 /*****************************************************************************
1095 * PictureTemporalScalableExtension *
1096 *****************************************************************************/
1098 static void PictureTemporalScalableExtension( vpar_thread_t * p_vpar )
1100 /* Scalable again, trashed again */
1101 RemoveBits( &p_vpar->bit_stream, 23 );
1105 /*****************************************************************************
1106 * CopyrightExtension : Keeps some legal informations *
1107 *****************************************************************************/
1109 static void CopyrightExtension( vpar_thread_t * p_vpar )
1111 u32 i_copyright_nb_1, i_copyright_nb_2; /* local integers */
1112 p_vpar->sequence.b_copyright_flag = GetBits( &p_vpar->bit_stream, 1 );
1113 /* A flag that says whether the copyright information is significant */
1114 p_vpar->sequence.i_copyright_id = GetBits( &p_vpar->bit_stream, 8 );
1115 /* An identifier compliant with ISO/CEI JTC 1/SC 29 */
1116 p_vpar->sequence.b_original = GetBits( &p_vpar->bit_stream, 1 );
1118 RemoveBits( &p_vpar->bit_stream, 8 );
1119 /* The copyright_number is split in three parts */
1121 i_copyright_nb_1 = GetBits( &p_vpar->bit_stream, 20 );
1122 RemoveBits( &p_vpar->bit_stream, 1 );
1124 i_copyright_nb_2 = GetBits( &p_vpar->bit_stream, 22 );
1125 RemoveBits( &p_vpar->bit_stream, 1 );
1126 /* third part and sum */
1127 p_vpar->sequence.i_copyright_nb = ( (u64)i_copyright_nb_1 << 44 ) |
1128 ( (u64)i_copyright_nb_2 << 22 ) |
1129 ( (u64)GetBits( &p_vpar->bit_stream, 22 ) );