cc708decoder.cpp File Reference

#include <cstdio>
#include <cstdlib>
#include "libmythbase/mythlogging.h"
#include "captions/cc708reader.h"
#include "captions/cc708decoder.h"

Include dependency graph for cc708decoder.cpp:

Go to the source code of this file.

Macros
#define	LOC   QString("CC708: ")
#define	DEBUG_CAPTIONS   0
#define	DEBUG_CC_SERVICE   0
#define	DEBUG_CC_SERVICE_2   0
#define	DEBUG_CC_SERVICE_BLOCK   0
#define	DEBUG_CC_RAWPACKET   0
#define	DEBUG_CC_VALIDPACKET   0
#define	DEBUG_CC_DECODE   0
#define	DEBUG_CC_PARSE   0
#define	SEND_STR

Typedefs
using	cc_table = std::array< const uint16_t, 0x60 >

Enumerations
enum	kCCTypes : std::uint8_t { NTSC_CC_f1 = 0, NTSC_CC_f2 = 1, DTVCC_PACKET_DATA = 2, DTVCC_PACKET_START = 3 }
enum	C0 : std::uint8_t {   NUL = 0x00, ETX = 0x03, BS = 0x08, FF = 0x0C,   CR = 0x0D, HCR = 0x0E, EXT1 = 0x10, P16 = 0x18 }
enum	C1 : std::uint8_t {   CW0 =0x80, CW1 =0x81, CW2 =0x82, CW3 =0x83,   CW4 =0x84, CW5 =0x85, CW6 =0x86, CW7 =0x87,   CLW =0x88, DSW =0x89, HDW =0x8A, TGW =0x8B,   DLW =0x8C, DLY =0x8D, DLC =0x8E, RST =0x8F,   SPA =0x90, SPC =0x91, SPL =0x92, SWA =0x97,   DF0 =0x98, DF1 =0x99, DF2 =0x9A, DF3 =0x9B,   DF4 =0x9C, DF5 =0x9D, DF6 =0x9E, DF7 =0x9F }

Functions
static void	parse_cc_packet (CC708Reader *cb_cbs, CaptionPacket *pkt, cc708_seen_times &last_seen)
static void	append_character (CC708Reader *cc, uint service_num, short ch)
static void	parse_cc_service_stream (CC708Reader *cc, uint service_num)
static int	handle_cc_c0_ext1_p16 (CC708Reader *cc, uint service_num, int i)
static int	handle_cc_c1 (CC708Reader *cc, uint service_num, int i)
static int	handle_cc_c2 (CC708Reader *cc, uint service_num, int i)
static int	handle_cc_c3 (CC708Reader *cc, uint service_num, int i)
static bool	rightsize_buf (CC708Reader *cc, uint service_num, uint block_size)
static void	append_cc (CC708Reader *cc, uint service_num, const unsigned char *blk_buf, int block_size)

Variables
const std::array< const std::string, 4 >	cc_types
const cc_table	CCtableG0
const cc_table	CCtableG1
const cc_table	CCtableG2
const cc_table	CCtableG3

Macro Definition Documentation

LOC

#define LOC   QString("CC708: ")

Definition at line 11 of file cc708decoder.cpp.

DEBUG_CAPTIONS

#define DEBUG_CAPTIONS   0

Definition at line 13 of file cc708decoder.cpp.

DEBUG_CC_SERVICE

#define DEBUG_CC_SERVICE   0

Definition at line 14 of file cc708decoder.cpp.

DEBUG_CC_SERVICE_2

#define DEBUG_CC_SERVICE_2   0

Definition at line 15 of file cc708decoder.cpp.

DEBUG_CC_SERVICE_BLOCK

#define DEBUG_CC_SERVICE_BLOCK   0

Definition at line 16 of file cc708decoder.cpp.

DEBUG_CC_RAWPACKET

#define DEBUG_CC_RAWPACKET   0

Definition at line 17 of file cc708decoder.cpp.

DEBUG_CC_VALIDPACKET

#define DEBUG_CC_VALIDPACKET   0

Definition at line 18 of file cc708decoder.cpp.

DEBUG_CC_DECODE

#define DEBUG_CC_DECODE   0

Definition at line 19 of file cc708decoder.cpp.

DEBUG_CC_PARSE

#define DEBUG_CC_PARSE   0

Definition at line 20 of file cc708decoder.cpp.

SEND_STR

#define SEND_STR

Value:

do { \
    if (cc->m_tempStrSize[service_num]) \
    { \
        cc->TextWrite(service_num, \
                      cc->m_tempStr[service_num], \
                      cc->m_tempStrSize[service_num]); \
        cc->m_tempStrSize[service_num] = 0; \
    } \
} while (false)

Definition at line 119 of file cc708decoder.cpp.

Typedef Documentation

cc_table

using cc_table = std::array<const uint16_t, 0x60>

Definition at line 106 of file cc708decoder.cpp.

Enumeration Type Documentation

kCCTypes

enum kCCTypes : std::uint8_t

Enumerator
NTSC_CC_f1
NTSC_CC_f2
DTVCC_PACKET_DATA
DTVCC_PACKET_START

Definition at line 22 of file cc708decoder.cpp.

C0

enum C0 : std::uint8_t

Enumerator
NUL
ETX
BS
FF
CR
HCR
EXT1
P16

Definition at line 86 of file cc708decoder.cpp.

C1

enum C1 : std::uint8_t

Enumerator
CW0
CW1
CW2
CW3
CW4
CW5
CW6
CW7
CLW
DSW
HDW
TGW
DLW
DLY
DLC
RST
SPA
SPC
SPL
SWA
DF0
DF1
DF2
DF3
DF4
DF5
DF6
DF7

Definition at line 98 of file cc708decoder.cpp.

Function Documentation

parse_cc_packet()

static void parse_cc_packet ( CC708Reader *  cb_cbs, CaptionPacket *  pkt, cc708_seen_times &  last_seen  )

static

Definition at line 627 of file cc708decoder.cpp.

Referenced by CC708Decoder::decode_cc_data(), and CC708Decoder::decode_cc_null().

append_character()

static void append_character ( CC708Reader *  cc, uint  service_num, short  ch  )

static

Definition at line 712 of file cc708decoder.cpp.

Referenced by handle_cc_c0_ext1_p16(), and parse_cc_service_stream().

parse_cc_service_stream()

static void parse_cc_service_stream ( CC708Reader *  cc, uint  service_num  )

static

Definition at line 130 of file cc708decoder.cpp.

Referenced by append_cc().

handle_cc_c0_ext1_p16()

static int handle_cc_c0_ext1_p16 ( CC708Reader *  cc, uint  service_num, int  i  )

static

Definition at line 306 of file cc708decoder.cpp.

Referenced by parse_cc_service_stream().

handle_cc_c1()

static int handle_cc_c1 ( CC708Reader *  cc, uint  service_num, int  i  )

static

Definition at line 375 of file cc708decoder.cpp.

Referenced by parse_cc_service_stream().

handle_cc_c2()

static int handle_cc_c2 ( CC708Reader *  cc, uint  service_num, int  i  )

static

Definition at line 511 of file cc708decoder.cpp.

Referenced by handle_cc_c0_ext1_p16().

handle_cc_c3()

static int handle_cc_c3 ( CC708Reader *  cc, uint  service_num, int  i  )

static

Definition at line 538 of file cc708decoder.cpp.

Referenced by handle_cc_c0_ext1_p16().

rightsize_buf()

static bool rightsize_buf ( CC708Reader *  cc, uint  service_num, uint  block_size  )

static

Definition at line 566 of file cc708decoder.cpp.

Referenced by append_cc().

append_cc()

static void append_cc ( CC708Reader *  cc, uint  service_num, const unsigned char *  blk_buf, int  block_size  )

static

Definition at line 602 of file cc708decoder.cpp.

Referenced by parse_cc_packet().

Variable Documentation

cc_types

const std::array<const std::string, 4> cc_types

Initial value:

=
{
    "NTSC line 21 field 1 closed captions"
    "NTSC line 21 field 2 closed captions"
    "DTVCC Channel Packet Data"
    "DTVCC Channel Packet Start"
}

Definition at line 30 of file cc708decoder.cpp.

CCtableG0

const cc_table CCtableG0

Initial value:

=
{
 
 
    ' ', '!','\"', '#',    '$', '%', '&', '\'', 
    '(', ')', '*', '+',    ',', '-', '.', '/',  
    '0', '1', '2', '3',    '4', '5', '6', '7',  
    '8', '9', ':', ';',    '<', '=', '>', '?',  
 
    '@', 'A', 'B', 'C',    'D', 'E', 'F', 'G',  
    'H', 'I', 'J', 'K',    'L', 'M', 'N', 'O',  
    'P', 'Q', 'R', 'S',    'T', 'U', 'V', 'W',  
    'X', 'Y', 'Z', '[',    '\\',']', '^', '_',  
 
    '`', 'a', 'b', 'c',    'd', 'e', 'f', 'g',  
    'h', 'i', 'j', 'k',    'l', 'm', 'n', 'o',  
    'p', 'q', 'r', 's',    't', 'u', 'v', 'w',  
    'x', 'y', 'z', '{',    '|', '}', '~',  0x266a, 
}

Definition at line 738 of file cc708decoder.cpp.

Referenced by parse_cc_service_stream().

CCtableG1

const cc_table CCtableG1

Definition at line 758 of file cc708decoder.cpp.

Referenced by parse_cc_service_stream().

CCtableG2

const cc_table CCtableG2

Definition at line 793 of file cc708decoder.cpp.

Referenced by handle_cc_c0_ext1_p16().

CCtableG3

const cc_table CCtableG3

Initial value:

=
{
 
    '#', 
       0, 0, 0,   0, 0, 0, 0,    0, 0, 0, 0,   0, 0, 0, 0, 
    0, 0, 0, 0,   0, 0, 0, 0,    0, 0, 0, 0,   0, 0, 0, 0, 
 
    0, 0, 0, 0,   0, 0, 0, 0,    0, 0, 0, 0,   0, 0, 0, 0, 
    0, 0, 0, 0,   0, 0, 0, 0,    0, 0, 0, 0,   0, 0, 0, 0, 
 
    0, 0, 0, 0,   0, 0, 0, 0,    0, 0, 0, 0,   0, 0, 0, 0, 
    0, 0, 0, 0,   0, 0, 0, 0,    0, 0, 0, 0,   0, 0, 0, 0, 
}

Definition at line 842 of file cc708decoder.cpp.

Referenced by handle_cc_c0_ext1_p16().