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Referencia del Archivo src/qt/src/3rdparty/libjpeg/jdhuff.h

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Clases

struct  d_derived_tbl
struct  bitread_perm_state
struct  bitread_working_state

'defines'

#define HUFF_LOOKAHEAD   8
#define BIT_BUF_SIZE   32
#define BITREAD_STATE_VARS
#define BITREAD_LOAD_STATE(cinfop, permstate)
#define BITREAD_SAVE_STATE(cinfop, permstate)
#define CHECK_BIT_BUFFER(state, nbits, action)
#define GET_BITS(nbits)   (((int) (get_buffer >> (bits_left -= (nbits)))) & ((1<<(nbits))-1))
#define PEEK_BITS(nbits)   (((int) (get_buffer >> (bits_left - (nbits)))) & ((1<<(nbits))-1))
#define DROP_BITS(nbits)   (bits_left -= (nbits))
#define HUFF_DECODE(result, state, htbl, failaction, slowlabel)

'typedefs'

typedef INT32 bit_buf_type

Funciones

 EXTERN (void) jpeg_make_d_derived_tbl JPP((j_decompress_ptr cinfo
 EXTERN (boolean) jpeg_fill_bit_buffer JPP((bitread_working_state *state

Variables

boolean isDC
boolean int tblno
boolean int d_derived_tbl ** pdtbl
register bit_buf_type get_buffer
register bit_buf_type register int bits_left
register bit_buf_type register
int int 
nbits
register bit_buf_type register
int d_derived_tbl
htbl
register bit_buf_type register
int d_derived_tbl int 
min_bits

Documentación de los 'defines'

#define BIT_BUF_SIZE   32
#define BITREAD_LOAD_STATE (   cinfop,
  permstate 
)
Valor:
br_state.cinfo = cinfop; \
        br_state.next_input_byte = cinfop->src->next_input_byte; \
        br_state.bytes_in_buffer = cinfop->src->bytes_in_buffer; \
        get_buffer = permstate.get_buffer; \
        bits_left = permstate.bits_left;
#define BITREAD_SAVE_STATE (   cinfop,
  permstate 
)
Valor:
cinfop->src->next_input_byte = br_state.next_input_byte; \
        cinfop->src->bytes_in_buffer = br_state.bytes_in_buffer; \
        permstate.get_buffer = get_buffer; \
        permstate.bits_left = bits_left
#define BITREAD_STATE_VARS
Valor:
register bit_buf_type get_buffer;  \
        register int bits_left;  \
        bitread_working_state br_state
#define CHECK_BIT_BUFFER (   state,
  nbits,
  action 
)
Valor:
#define DROP_BITS (   nbits)    (bits_left -= (nbits))
#define GET_BITS (   nbits)    (((int) (get_buffer >> (bits_left -= (nbits)))) & ((1<<(nbits))-1))
#define HUFF_DECODE (   result,
  state,
  htbl,
  failaction,
  slowlabel 
)
Valor:
{ register int nb, look; \
  if (bits_left < HUFF_LOOKAHEAD) { \
    if (! jpeg_fill_bit_buffer(&state,get_buffer,bits_left, 0)) {failaction;} \
    get_buffer = state.get_buffer; bits_left = state.bits_left; \
    if (bits_left < HUFF_LOOKAHEAD) { \
      nb = 1; goto slowlabel; \
    } \
  } \
  look = PEEK_BITS(HUFF_LOOKAHEAD); \
  if ((nb = htbl->look_nbits[look]) != 0) { \
    DROP_BITS(nb); \
    result = htbl->look_sym[look]; \
  } else { \
    nb = HUFF_LOOKAHEAD+1; \
slowlabel: \
    if ((result=jpeg_huff_decode(&state,get_buffer,bits_left,htbl,nb)) < 0) \
        { failaction; } \
    get_buffer = state.get_buffer; bits_left = state.bits_left; \
  } \
}
#define HUFF_LOOKAHEAD   8
#define PEEK_BITS (   nbits)    (((int) (get_buffer >> (bits_left - (nbits)))) & ((1<<(nbits))-1))

Documentación de los 'typedefs'


Documentación de las funciones

EXTERN ( void  )
EXTERN ( boolean  )

Documentación de las variables

register bit_buf_type register int bits_left
register bit_buf_type register int d_derived_tbl* htbl
register bit_buf_type register int int nbits
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