elements.h

3－8 VHDL 译码器 请

/**********************************************************************
 * Software Copyright Licensing Disclaimer
 *
 * This software module was originally developed by contributors to the
 * course of the development of ISO/IEC 14496-10 for reference purposes
 * and its performance may not have been optimized.  This software
 * module is an implementation of one or more tools as specified by
 * ISO/IEC 14496-10.  ISO/IEC gives users free license to this software
 * module or modifications thereof. Those intending to use this software
 * module in products are advised that its use may infringe existing
 * patents.  ISO/IEC have no liability for use of this software module
 * or modifications thereof.  The original contributors retain full
 * rights to modify and use the code for their own purposes, and to
 * assign or donate the code to third-parties.
 *
 * This copyright notice must be included in all copies or derivative
 * works.  Copyright (c) ISO/IEC 2004.
 **********************************************************************/

/*!
 *************************************************************************************
 * \file elements.h
 *
 * \brief
 *    Header file for elements in H.264 streams
 *
 * \date
 *    6.10.2000
 *
 * \version
 *    1.0
 *
 *  \author
 *     Sebastian Purreiter     <[e-mail]>  \n
 *     Siemens AG, Information and Communication Mobile              \n
 *     P.O.Box 80 17 07                                              \n
 *     D-81617 Munich, Germany                                       \n
 *************************************************************************************
 */

#ifndef _ELEMENTS_H_
#define _ELEMENTS_H_

/*!
 *  definition of H.264 syntax elements
 *  order of elements follow dependencies for picture reconstruction
 */
/*!
 * \brief   Assignment of old TYPE partition elements to new
 *          elements
 *
 *  old element     | new elements
 *  ----------------+-------------------------------------------------------------------
 *  TYPE_HEADER     | SE_HEADER, SE_PTYPE
 *  TYPE_MBHEADER   | SE_MBTYPE, SE_REFFRAME, SE_INTRAPREDMODE
 *  TYPE_MVD        | SE_MVD
 *  TYPE_CBP        | SE_CBP_INTRA, SE_CBP_INTER
 *  SE_DELTA_QUANT_INTER
 *  SE_DELTA_QUANT_INTRA
 *  TYPE_COEFF_Y    | SE_LUM_DC_INTRA, SE_LUM_AC_INTRA, SE_LUM_DC_INTER, SE_LUM_AC_INTER
 *  TYPE_2x2DC      | SE_CHR_DC_INTRA, SE_CHR_DC_INTER
 *  TYPE_COEFF_C    | SE_CHR_AC_INTRA, SE_CHR_AC_INTER
 *  TYPE_EOS        | SE_EOS
*/

#define SE_HEADER           0
#define SE_PTYPE            1
#define SE_MBTYPE           2
#define SE_REFFRAME         3
#define SE_INTRAPREDMODE    4
#define SE_MVD              5
#define SE_CBP_INTRA        6
#define SE_LUM_DC_INTRA     7
#define SE_CHR_DC_INTRA     8
#define SE_LUM_AC_INTRA     9
#define SE_CHR_AC_INTRA     10
#define SE_CBP_INTER        11
#define SE_LUM_DC_INTER     12
#define SE_CHR_DC_INTER     13
#define SE_LUM_AC_INTER     14
#define SE_CHR_AC_INTER     15
#define SE_DELTA_QUANT_INTER      16
#define SE_DELTA_QUANT_INTRA      17
#define SE_BFRAME           18
#define SE_EOS              19
#define SE_MAX_ELEMENTS     20


#define NO_EC               0   //!< no error concealment necessary
#define EC_REQ              1   //!< error concealment required
#define EC_SYNC             2   //!< search and sync on next header element

#define MAXPARTITIONMODES   2   //!< maximum possible partition modes as defined in assignSE2partition[][]

/*!
 *  \brief  lookup-table to assign different elements to partition
 *
 *  \note   here we defined up to 6 different partitions similar to
 *          document Q15-k-18 described in the PROGFRAMEMODE.
 *          The Sliceheader contains the PSYNC information. \par
 *
 *          Elements inside a partition are not ordered. They are
 *          ordered by occurence in the stream.
 *          Assumption: Only partitionlosses are considered. \par
 *
 *          The texture elements luminance and chrominance are
 *          not ordered in the progressive form
 *          This may be changed in image.c \par
 *
 *          We also defined the proposed internet partition mode
 *          of Stephan Wenger here. To select the desired mode
 *          uncomment one of the two following lines. \par
 *
 *  -IMPORTANT:
 *          Picture- or Sliceheaders must be assigned to partition 0. \par
 *          Furthermore partitions must follow syntax dependencies as
 *          outlined in document Q15-J-23.
 */


extern int assignSE2partition[][SE_MAX_ELEMENTS];
extern int PartitionMode;

#endif