1 /*

     2 * Copyright (c) 2010 Ixonos Plc.

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - Initial contribution

    11 *

    12 * Contributors:

    13 * Ixonos Plc

    14 *

    15 * Description:  

    16 * Sync codes.

    17 *

    18 */

    19 

    20 

    21 #ifndef _SYNC_H_

    22 #define _SYNC_H_

    23 

    24 

    25 #include "epoclib.h"

    26 

    27 #include "biblin.h"

    28 

    29 

    30 /*

    31  * Defines

    32  */

    33 

    34 /* Return values */

    35 #define SNC_NO_SYNC  0        /* No synchronization code found */

    36 #define SNC_PSC      1        /* Picture Start Code */

    37 #define SNC_GBSC     2        /* GOB Start Code */

    38 #define SNC_EOS      4        /* End of Sequence */

    39 

    40 /*** MPEG-4 REVISION ***/

    41 #define SNC_VIDPACK  5        /* Video Packet resynchronization marker */

    42 #define SNC_VOS      6        /* Video Object Sequence (VOS) Start Code */

    43 #define SNC_VOP      7        /* Video Object Plane (VOP) Start Code */

    44 #define SNC_GOV      8        /* Group of VOPs (GOV) Start Code */

    45 #define SNC_USERDATA 9        /* User Data Start Code */

    46 #define SNC_EOB      10       /* Visual Sequence End Code */

    47 #define SNC_VID      11       /* Other Video Object Header Start Codes */

    48 #define SNC_PATTERN  12       /* The search pattern in sncSeekBitPattern */

    49 /*** End MPEG-4 REVISION ***/

    50 

    51 #define SNC_STUFFING 13       /* Stuffing in the end of a buffer containing

    52                                  one frame */

    53 

    54 /* See sncRewindAndSeekNewSync for description. */

    55 #define SNC_DEFAULT_REWIND -1

    56 

    57 

    58 /*

    59  * Function prototypes

    60  */

    61 

    62 int sncCheckSync(bibBuffer_t *buffer, int *numStuffBits, int16 *error);

    63 

    64 int sncRewindAndSeekNewSync(u_int32 numBitsToRewind, bibBuffer_t *buffer, 

    65    int16 *error);

    66 

    67 int sncSeekFrameSync(bibBuffer_t *buffer, int16 *error);

    68 

    69 int sncSeekSync(bibBuffer_t *buffer, int16 *error);

    70 

    71    int sncCheckMpegVOP(bibBuffer_t *buffer, int16 *error);

    72    int sncCheckMpegSync(bibBuffer_t *buffer, int f_code, int16 *error);

    73    int sncRewindAndSeekNewMPEGSync(int earliestBitPos, bibBuffer_t *buffer,

    74                                    int f_code, int16 *error);

    75    int sncSeekMPEGSync(bibBuffer_t *buffer, int f_code, int16 *error);

    76    int sncSeekMPEGStartCode(bibBuffer_t *buffer, int f_code, int skipVPSync, int checkUD, int16 *error);

    77    int sncSeekBitPattern(bibBuffer_t *buffer, u_int32 BitPattern, 

    78       int BitPatternLength, int16 *error);

    79    int sncRewindStuffing(bibBuffer_t *buffer, int16 *error);

    80 

    81 #endif

    82 // End of File