source: svn/newcon3bcm2_21bu/nexus/modules/display/7552/include/nexus_vbi.h

/***************************************************************************
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 *  secrets of Broadcom, and you shall use all reasonable efforts to protect the confidentiality thereof,
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 *
 * $brcm_Workfile: nexus_vbi.h $
 * $brcm_Revision: 10 $
 * $brcm_Date: 2/25/11 4:37p $
 *
 * Module Description:
 *
 * Revision History:
 *
 * $brcm_Log: /nexus/modules/display/7400/include/nexus_vbi.h $
 * 
 * 10   2/25/11 4:37p erickson
 * SW7422-255: add AMOL support
 *
 * 9   3/5/10 12:33p erickson
 * SW3556-1043: add usage comments for NEXUS_TeletextLine.lineNumber
 *
 * 8   3/10/09 10:58a erickson
 * PR51253: added NEXUS_TeletextLine.topField
 *
 * 7   10/16/08 12:26p erickson
 * PR47070: rework NEXUS_GemStarData structure
 *
 * 6   10/1/08 3:43p erickson
 * PR47070: extended NEXUS_GemStarData to include baseLineNumber, lineMask
 *  and errorMask
 *
 * 5   9/18/08 12:52p erickson
 * PR47070: update comments
 *
 * 4   6/16/08 1:56p erickson
 * PR43504: added GemStar
 *
 * 3   4/28/08 4:10p erickson
 * PR41533: unify EIA-608 and EIA-708 closed caption data capture in
 *  NEXUS_VideoInput_ReadClosedCaption
 *
 * 2   1/23/08 2:39p erickson
 * PR35457: update docs
 *
 * 1   1/18/08 2:20p jgarrett
 * PR 38808: Merging to main branch
 *
 * Nexus_Devel/1   1/11/08 1:51p erickson
 * PR38679: add vbi read/write api's
 *
 **************************************************************************/
#ifndef NEXUS_VBI_H__
#define NEXUS_VBI_H__

#include "nexus_types.h"

#ifdef __cplusplus
extern "C" {
#endif

/*=****************************************
This file contains common data structures for VBI input and output.

The VBI data types that are currently supported in Nexus are:
- Closed Captioning
- Teletext
- WSS (Widescreen Signalling)
- CGMS (Copy generation management system - analog)
- VPS (Video Program System)
- GemStar

Other types will be added as needed.

VBI data can be read from VideoInput or written to a Display for output on a VEC.
See nexus_video_input_vbi.h and nexus_display_vbi.h.

See nexus_types.h for NEXUS_ClosedCaptionData.

******************************************/

/**
Summary:
Line size used in NEXUS_TeletextLine
**/
#define NEXUS_TELETEXT_LINESIZE 42

/**
Summary:
One line of teletext data

Description:
See NEXUS_VideoInput_ReadTeletext and NEXUS_Display_WriteTeletext
**/
typedef struct NEXUS_TeletextLine
{
    bool topField;          /* If true, top field. Otherwise, bottom field. */
    unsigned lineNumber;    /* lineNumber is only used to specify field breaks. It is not used for exact VBI line placement.
                               If you send an array of 10 NEXUS_TeletextLine entries with lineNumbers of 0,1,2,3,4,0,1,2,3,4, then
                               the first 0..4 series will be sent on one field, the second 0..4 series will be sent on the next.
                               This allows applications to send large blocks of TT data in one call. It also allows Nexus to remap
                               line numbers to avoid unencodable VBI lines or VBI line conflicts with other standards like VPS, WSS or CC. */
    uint8_t framingCode;
    uint8_t data[NEXUS_TELETEXT_LINESIZE];
} NEXUS_TeletextLine;

/**
Summary:
One field of VPS data

Description:
See NEXUS_VideoInput_ReadVps and NEXUS_Display_WriteVps
**/
typedef struct NEXUS_VpsData
{
    uint8_t byte05;
    uint8_t byte11;
    uint8_t byte12;
    uint8_t byte13;
    uint8_t byte14;
    uint8_t byte15;
} NEXUS_VpsData;

/**
Summary:
Array size used in NEXUS_GemStarData
**/
#define NEXUS_GEMSTAR_MAX_LINES 5

/**
Summary:
One entry of GemStar data

Description:
See NEXUS_VideoInput_ReadGemStar and NEXUS_Display_WriteGemStar.
See NEXUS_VideoInputVbiSettings.gemStar for decoding options for gemstar data.
See NEXUS_DisplayVbiSettings.gemStar for encoding options for gemstar data.
**/
typedef struct NEXUS_GemStarData
{
    bool topField;     /* If true, top field. Otherwise, bottom field. */

    uint32_t lineMask; /* A bitmask indicating the significance of the data[] array.
                          If the ith bit in ulDataLines is one, then video line i of the field will be encoded with gemstar data.
                          The gemstar data comes from data[] where data[0] is the first piece of data to be encoded, data[1] is the second piece of data to be encoded, etc.
                          Example: If lineMask is 1000000001010b, then data[0] going out on line 1, data[1] on line 3 and data[2] on line 12. */

    uint32_t data[NEXUS_GEMSTAR_MAX_LINES]; /* a packed array where each member corresponds to lineMask */

    uint32_t errorMask; /* Parity errors in the captured data[] lines. The Nth bit in errorMask corresponds to the Nth entry in data[].
                           There is no relationship between lineMask and errorMask.
                           Example If errorMask is 01010b, then data[1] has an error and data[3] has an error.
                           errorMask can never be greater than NEXUS_GEMSTAR_MAX_LINES.*/
 } NEXUS_GemStarData;

/**
Summary:
Automated Measurement of Lineup (AMOL) for Nielsen Media Research
**/
typedef enum NEXUS_AmolType
{
    NEXUS_AmolType_eI,           /* AMOL I             */
    NEXUS_AmolType_eII_Lowrate,  /* AMOL II, 1 Mbit/s. */
    NEXUS_AmolType_eII_Highrate, /* AMOL II, 2 Mbit/s. */
    NEXUS_AmolType_eMax
} NEXUS_AmolType;

/**
Summary:
AMOL data for one video field
**/
typedef struct NEXUS_AmolData
{
    bool topField;     /* If true, top field. Otherwise, bottom field. */
#define NEXUS_MAX_AMOL_DATA 24
    uint8_t data[NEXUS_MAX_AMOL_DATA]; /* typically 6 bytes for type I, 12 bytes for II_Lowrate and 24 bytes for II_Highrate */
    unsigned length; /* number of bytes in data[] */
} NEXUS_AmolData;

#ifdef __cplusplus
}
#endif

#endif /* NEXUS_VBI_H__ */