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39 #ifndef OJPH_BLOCK_DECODER_H
40 #define OJPH_BLOCK_DECODER_H
59 #endif // !OJPH_BLOCK_DECODER_H
uint8_t ui8
Definition: ojph_defs.h:50
Definition: ojph_base.h:48
static ui32 count_leading_zeros(ui32 val)
Definition: ojph_arch.h:93
void rev_read(rev_struct *vlcp)
Read and unstuff data from a backwardly-growing segment.
Definition: ojph_block_decoder.cpp:323
rev_struct()
Definition: ojph_block_decoder.cpp:292
ui32 frwd_fetch(frwd_struct *msp)
Fetches 32 bits from the frwd_struct bitstream.
Definition: ojph_block_decoder.cpp:962
static void mel_init(dec_mel_st *melp, ui8 *bbuf, int lcup, int scup)
Initiates a dec_mel_st structure for MEL decoding and reads some bytes in order to get the read addre...
Definition: ojph_block_decoder.cpp:237
static ui16 vlc_tbl0[1024]
vlc_tbl0 contains decoding information for initial row of quads
Definition: ojph_block_decoder.cpp:70
ui64 tmp
temporary buffer for read data
Definition: ojph_block_decoder.cpp:89
static void mel_decode(dec_mel_st *melp)
Decodes unstuffed MEL segment bits stored in tmp to runs.
Definition: ojph_block_decoder.cpp:186
int bits
number of bits stored in tmp
Definition: ojph_block_decoder.cpp:90
void frwd_init(frwd_struct *msp, const ui8 *data, int size)
Initialize frwd_struct struct and reads some bytes.
Definition: ojph_block_decoder.cpp:916
int k
state of MEL decoder
Definition: ojph_block_decoder.cpp:93
ui32 rev_advance_mrp(rev_struct *mrp, ui32 num_bits)
Consumes num_bits from a rev_struct structure.
Definition: ojph_block_decoder.cpp:572
bool ojph_decode_codeblock(ui8 *coded_data, ui32 *decoded_data, ui32 missing_msbs, ui32 num_passes, ui32 lengths1, ui32 lengths2, ui32 width, ui32 height, ui32 stride)
Decodes one codeblock, processing the cleanup, siginificance propagation, and magnitude refinement pa...
Definition: ojph_block_decoder.cpp:989
void rev_read_mrp(rev_struct *mrp)
Reads and unstuffs from rev_struct.
Definition: ojph_block_decoder.cpp:466
ui32 bits
number of bits stored in tmp
Definition: ojph_block_decoder.cpp:851
ui32 decode_init_uvlc(ui32 vlc, ui32 mode, ui32 *u)
Decode initial UVLC to get the u value (or u_q)
Definition: ojph_block_decoder.cpp:664
ui64 tmp
temporary buffer of read data
Definition: ojph_block_decoder.cpp:296
static ui32 population_count(ui32 val)
Definition: ojph_arch.h:73
void frwd_read(frwd_struct *msp)
Read and unstuffs 32 bits from forward-growing bitstream.
Definition: ojph_block_decoder.cpp:875
ui32 rev_fetch_mrp(rev_struct *mrp)
Retrieves 32 bits from the head of a rev_struct structure.
Definition: ojph_block_decoder.cpp:555
ui32 rev_fetch(rev_struct *vlcp)
Retrieves 32 bits from the head of a rev_struct structure.
Definition: ojph_block_decoder.cpp:430
static void mel_read(dec_mel_st *melp)
Reads and unstuffs the MEL bitstream.
Definition: ojph_block_decoder.cpp:113
uint32_t ui32
Definition: ojph_defs.h:54
MEL state structure for reading and decoding the MEL bitstream.
Definition: ojph_block_decoder.cpp:83
ui32 bits
number of bits stored in tmp
Definition: ojph_block_decoder.cpp:297
dec_mel_st()
Definition: ojph_block_decoder.cpp:84
bool decode_vlc_init_tables()
Initializes vlc_tbl0 and vlc_tbl1 tables, from table0.h and table1.h.
Definition: ojph_block_decoder.cpp:585
bool unstuff
true if the next bit needs to be unstuffed
Definition: ojph_block_decoder.cpp:92
int size
number of bytes left
Definition: ojph_block_decoder.cpp:298
bool unstuff
true if the last byte is more than 0x8F then the current byte is unstuffed if it is 0x7F
Definition: ojph_block_decoder.cpp:299
Initializes VLC tables vlc_tbl0 and vlc_tbl1.
Definition: ojph_block_decoder.cpp:848
ui32 rev_advance(rev_struct *vlcp, ui32 num_bits)
Consumes num_bits from a rev_struct structure.
Definition: ojph_block_decoder.cpp:447
int size
number of bytes in MEL code
Definition: ojph_block_decoder.cpp:91
ui8 * data
pointer to where to read data
Definition: ojph_block_decoder.cpp:295
uint64_t ui64
Definition: ojph_defs.h:56
void rev_init_mrp(rev_struct *mrp, ui8 *data, int lcup, int len2)
Initialized rev_struct structure for MRP segment, and reads a number of bytes such that the next 32 b...
Definition: ojph_block_decoder.cpp:521
const ui8 * data
pointer to bitstream
Definition: ojph_block_decoder.cpp:849
uint16_t ui16
Definition: ojph_defs.h:52
ui64 runs
runs of decoded MEL codewords (7 bits/run)
Definition: ojph_block_decoder.cpp:97
A structure for reading and unstuffing a segment that grows backward, such as VLC and MRP.
Definition: ojph_block_decoder.cpp:291
void frwd_advance(frwd_struct *msp, ui32 num_bits)
Consume num_bits bits from the bitstream of frwd_struct.
Definition: ojph_block_decoder.cpp:947
static ui16 vlc_tbl1[1024]
vlc_tbl1 contains decoding information for non-initial row of quads
Definition: ojph_block_decoder.cpp:73
ui64 tmp
temporary buffer of read data
Definition: ojph_block_decoder.cpp:850
static int mel_get_run(dec_mel_st *melp)
Retrieves one run from dec_mel_st; if there are no runs stored MEL segment is decoded.
Definition: ojph_block_decoder.cpp:276
Definition: ojph_block_decoder.cpp:49
ui8 * data
the address of data (or bitstream)
Definition: ojph_block_decoder.cpp:88
void rev_init(rev_struct *vlcp, ui8 *data, int lcup, int scup)
Initiates the rev_struct structure and reads a few bytes to move the read address to multiple of 4.
Definition: ojph_block_decoder.cpp:390
int num_runs
number of decoded runs left in runs (maximum 8)
Definition: ojph_block_decoder.cpp:96
bool unstuff
true if a bit needs to be unstuffed from next byte
Definition: ojph_block_decoder.cpp:852
ui32 decode_noninit_uvlc(ui32 vlc, ui32 mode, ui32 *u)
Decode non-initial UVLC to get the u value (or u_q)
Definition: ojph_block_decoder.cpp:774
int size
size of data
Definition: ojph_block_decoder.cpp:853