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revision 1.16.2.1, Fri Apr 4 22:12:07 2003 UTC revision 1.20, Sun Dec 5 13:56:13 2004 UTC
# Line 3  Line 3 
3   *  XVID MPEG-4 VIDEO CODEC   *  XVID MPEG-4 VIDEO CODEC
4   *  - Bitstream reader/writer inlined functions and constants-   *  - Bitstream reader/writer inlined functions and constants-
5   *   *
6   *  Copyright (C) 2001-2002 - Peter Ross <pross@xvid.org>   *  Copyright (C) 2001-2003 Peter Ross <pross@xvid.org>
7   *   *
8   *  This file is part of XviD, a free MPEG-4 video encoder/decoder   *  This program is free software ; you can redistribute it and/or modify
9   *   *  it under the terms of the GNU General Public License as published by
  *  XviD is free software; you can redistribute it and/or modify it  
  *  under the terms of the GNU General Public License as published by  
10   *  the Free Software Foundation; either version 2 of the License, or   *  the Free Software Foundation; either version 2 of the License, or
11   *  (at your option) any later version.   *  (at your option) any later version.
12   *   *
# Line 21  Line 19 
19   *  along with this program; if not, write to the Free Software   *  along with this program; if not, write to the Free Software
20   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
21   *   *
  *  Under section 8 of the GNU General Public License, the copyright  
  *  holders of XVID explicitly forbid distribution in the following  
  *  countries:  
  *  
  *    - Japan  
  *    - United States of America  
  *  
  *  Linking XviD statically or dynamically with other modules is making a  
  *  combined work based on XviD.  Thus, the terms and conditions of the  
  *  GNU General Public License cover the whole combination.  
  *  
  *  As a special exception, the copyright holders of XviD give you  
  *  permission to link XviD with independent modules that communicate with  
  *  XviD solely through the VFW1.1 and DShow interfaces, regardless of the  
  *  license terms of these independent modules, and to copy and distribute  
  *  the resulting combined work under terms of your choice, provided that  
  *  every copy of the combined work is accompanied by a complete copy of  
  *  the source code of XviD (the version of XviD used to produce the  
  *  combined work), being distributed under the terms of the GNU General  
  *  Public License plus this exception.  An independent module is a module  
  *  which is not derived from or based on XviD.  
  *  
  *  Note that people who make modified versions of XviD are not obligated  
  *  to grant this special exception for their modified versions; it is  
  *  their choice whether to do so.  The GNU General Public License gives  
  *  permission to release a modified version without this exception; this  
  *  exception also makes it possible to release a modified version which  
  *  carries forward this exception.  
  *  
22   * $Id$   * $Id$
23   *   *
24   ****************************************************************************/   ****************************************************************************/
# Line 57  Line 26 
26  #ifndef _BITSTREAM_H_  #ifndef _BITSTREAM_H_
27  #define _BITSTREAM_H_  #define _BITSTREAM_H_
28    
 #include <stdio.h>  
   
29  #include "../portab.h"  #include "../portab.h"
30  #include "../decoder.h"  #include "../decoder.h"
31  #include "../encoder.h"  #include "../encoder.h"
# Line 78  Line 45 
45  #define GRPOFVOP_START_CODE             0x000001b3  #define GRPOFVOP_START_CODE             0x000001b3
46  /*#define VIDSESERR_ERROR_CODE  0x000001b4 */  /*#define VIDSESERR_ERROR_CODE  0x000001b4 */
47  #define VISOBJ_START_CODE               0x000001b5  #define VISOBJ_START_CODE               0x000001b5
48  /*#define SLICE_START_CODE      0x000001b7 */  #define VOP_START_CODE                  0x000001b6
49  /*#define EXT_START_CODE        0x000001b8 */  /*#define STUFFING_START_CODE   0x000001c3 */
50    
51    
52  #define VISOBJ_TYPE_VIDEO                               1  #define VISOBJ_TYPE_VIDEO                               1
# Line 91  Line 58 
58    
59  #define VIDOBJLAY_TYPE_SIMPLE                   1  #define VIDOBJLAY_TYPE_SIMPLE                   1
60  /*#define VIDOBJLAY_TYPE_SIMPLE_SCALABLE    2 */  /*#define VIDOBJLAY_TYPE_SIMPLE_SCALABLE    2 */
61  #define VIDOBJLAY_TYPE_CORE                             3  /*#define VIDOBJLAY_TYPE_CORE                           3 */
62  #define VIDOBJLAY_TYPE_MAIN                             4  /*#define VIDOBJLAY_TYPE_MAIN                           4 */
63    /*#define VIDOBJLAY_TYPE_NBIT                           5 */
64    /*#define VIDOBJLAY_TYPE_ANIM_TEXT                      6 */
65    /*#define VIDOBJLAY_TYPE_ANIM_MESH                      7 */
66    /*#define VIDOBJLAY_TYPE_SIMPLE_FACE            8 */
67    /*#define VIDOBJLAY_TYPE_STILL_SCALABLE         9 */
68    #define VIDOBJLAY_TYPE_ART_SIMPLE               10
69    /*#define VIDOBJLAY_TYPE_CORE_SCALABLE          11 */
70    /*#define VIDOBJLAY_TYPE_ACE                            12 */
71    /*#define VIDOBJLAY_TYPE_ADVANCED_SCALABLE_TEXTURE 13 */
72    /*#define VIDOBJLAY_TYPE_SIMPLE_FBA                     14 */
73    /*#define VIDEOJLAY_TYPE_SIMPLE_STUDIO    15*/
74    /*#define VIDEOJLAY_TYPE_CORE_STUDIO      16*/
75    #define VIDOBJLAY_TYPE_ASP              17
76    /*#define VIDOBJLAY_TYPE_FGS              18*/
77    
78    
79  /*#define VIDOBJLAY_AR_SQUARE           1 */  /*#define VIDOBJLAY_AR_SQUARE           1 */
# Line 108  Line 89 
89  #define VIDOBJLAY_SHAPE_BINARY_ONLY             2  #define VIDOBJLAY_SHAPE_BINARY_ONLY             2
90  #define VIDOBJLAY_SHAPE_GRAYSCALE               3  #define VIDOBJLAY_SHAPE_GRAYSCALE               3
91    
92  #define VO_START_CODE   0x8  
93  #define VOL_START_CODE  0x12  #define SPRITE_NONE             0
94  #define VOP_START_CODE  0x1b6  #define SPRITE_STATIC   1
95    #define SPRITE_GMC              2
96    
97    
98    
99  #define READ_MARKER()   BitstreamSkip(bs, 1)  #define READ_MARKER()   BitstreamSkip(bs, 1)
100  #define WRITE_MARKER()  BitstreamPutBit(bs, 1)  #define WRITE_MARKER()  BitstreamPutBit(bs, 1)
# Line 132  Line 116 
116   * Prototypes   * Prototypes
117   ****************************************************************************/   ****************************************************************************/
118    
119  int  int read_video_packet_header(Bitstream *bs,
120  read_video_packet_header(Bitstream *bs, const int addbits, int * quant);                                                           DECODER * dec,
121                                                             const int addbits,
122                                                             int *quant,
123                                                             int *fcode_forward,
124                                                             int *fcode_backward,
125                                                             int *intra_dc_threshold);
126    
127  /* header stuff */  /* header stuff */
128  int BitstreamReadHeaders(Bitstream * bs,  int BitstreamReadHeaders(Bitstream * bs,
# Line 143  Line 131 
131                                                   uint32_t * quant,                                                   uint32_t * quant,
132                                                   uint32_t * fcode_forward,                                                   uint32_t * fcode_forward,
133                                                   uint32_t * fcode_backward,                                                   uint32_t * fcode_backward,
134                                                   uint32_t * intra_dc_threshold);                                                   uint32_t * intra_dc_threshold,
135                                                     WARPPOINTS * gmc_warp);
136    
137    
138  void BitstreamWriteVolHeader(Bitstream * const bs,  void BitstreamWriteVolHeader(Bitstream * const bs,
139                                                           const MBParam * pParam,                                                           const MBParam * pParam,
140                                                           const FRAMEINFO * frame);                                                           const FRAMEINFO * const frame);
141    
142  void BitstreamWriteVopHeader(Bitstream * const bs,  void BitstreamWriteVopHeader(Bitstream * const bs,
143                                                           const MBParam * pParam,                                                           const MBParam * pParam,
144                                                           const FRAMEINFO * frame,                                                           const FRAMEINFO * const frame,
145                                                           int vop_coded);                                                           int vop_coded,
146                                                             unsigned int quant);
147  /*****************************************************************************  
148   * Inlined functions  void BitstreamWriteUserData(Bitstream * const bs,
149   ****************************************************************************/                                                          uint8_t * data,
150                                                            const int length);
151    
152  /* initialise bitstream structure */  /* initialise bitstream structure */
153    
# Line 242  Line 232 
232    
233  /* skip n bits forward in bitstream */  /* skip n bits forward in bitstream */
234    
235  static void __inline  static __inline void
236  BitstreamSkip(Bitstream * const bs,  BitstreamSkip(Bitstream * const bs,
237                            const uint32_t bits)                            const uint32_t bits)
238  {  {
# Line 264  Line 254 
254    
255    
256  /* number of bits to next byte alignment */  /* number of bits to next byte alignment */
257  static uint32_t __inline  static __inline uint32_t
258  BitstreamNumBitsToByteAlign(Bitstream *bs)  BitstreamNumBitsToByteAlign(Bitstream *bs)
259  {  {
260          uint32_t n = (32 - bs->pos) % 8;          uint32_t n = (32 - bs->pos) % 8;
# Line 273  Line 263 
263    
264    
265  /* show nbits from next byte alignment */  /* show nbits from next byte alignment */
266  static uint32_t __inline  static __inline uint32_t
267  BitstreamShowBitsFromByteAlign(Bitstream *bs, int bits)  BitstreamShowBitsFromByteAlign(Bitstream *bs, int bits)
268  {  {
269          int bspos = bs->pos + BitstreamNumBitsToByteAlign(bs);          int bspos = bs->pos + BitstreamNumBitsToByteAlign(bs);
# Line 295  Line 285 
285    
286  /* move forward to the next byte boundary */  /* move forward to the next byte boundary */
287    
288  static void __inline  static __inline void
289  BitstreamByteAlign(Bitstream * const bs)  BitstreamByteAlign(Bitstream * const bs)
290  {  {
291          uint32_t remainder = bs->pos % 8;          uint32_t remainder = bs->pos % 8;
# Line 315  Line 305 
305  }  }
306    
307    
308  /*      flush the bitstream & return length (unit bytes)  /*
309          NOTE: assumes no futher bitstream functions will be called.   * flush the bitstream & return length (unit bytes)
310     * NOTE: assumes no futher bitstream functions will be called.
311   */   */
312    
313  static uint32_t __inline  static uint32_t __inline
# Line 363  Line 354 
354          }          }
355  }  }
356    
   
 /* pad bitstream to the next byte boundary */  
   
 static void __inline  
 BitstreamPad(Bitstream * const bs)  
 {  
         uint32_t remainder = bs->pos % 8;  
   
         if (remainder) {  
                 BitstreamForward(bs, 8 - remainder);  
         }  
 }  
   
   
357  /* read n bits from bitstream */  /* read n bits from bitstream */
358    
359  static uint32_t __inline  static uint32_t __inline
# Line 439  Line 416 
416          }          }
417  }  }
418    
419    static const int stuffing_codes[8] =
420    {
421                    /* nbits     stuffing code */
422            0,              /* 1          0 */
423            1,              /* 2          01 */
424            3,              /* 3          011 */
425            7,              /* 4          0111 */
426            0xf,    /* 5          01111 */
427            0x1f,   /* 6          011111 */
428            0x3f,   /* 7          0111111 */
429            0x7f,   /* 8          01111111 */
430    };
431    
432    /* pad bitstream to the next byte boundary */
433    
434    static void __inline
435    BitstreamPad(Bitstream * const bs)
436    {
437            int bits = 8 - (bs->pos % 8);
438            if (bits < 8)
439                    BitstreamPutBits(bs, stuffing_codes[bits - 1], bits);
440    }
441    
442    
443    /*
444     * pad bitstream to the next byte boundary
445     * alway pad: even if currently at the byte boundary
446     */
447    
448    static void __inline
449    BitstreamPadAlways(Bitstream * const bs)
450    {
451            int bits = 8 - (bs->pos % 8);
452            BitstreamPutBits(bs, stuffing_codes[bits - 1], bits);
453    }
454    
455  #endif /* _BITSTREAM_H_ */  #endif /* _BITSTREAM_H_ */

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