FFmpeg
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Macros | |
#define | FREQ_BITS 14 |
#define | VALUE_BITS 18 |
#define | TOP_VALUE ((1 << VALUE_BITS) - 1) |
#define | FIRST_QTR (TOP_VALUE / 4 + 1) |
#define | HALF (2 * FIRST_QTR) |
#define | THIRD_QTR (3 * FIRST_QTR) |
#define | LUT_BITS (FREQ_BITS - 8) |
#define | LUT_SIZE (1 << LUT_BITS) |
#define | LUT_BUFF 4 |
Functions | |
static void | bgmc_lut_fillp (uint8_t *lut, int *lut_status, int delta) |
Initialize a given lookup table using a given delta. More... | |
static uint8_t * | bgmc_lut_getp (uint8_t *lut, int *lut_status, int delta) |
Retune the index of a suitable lookup table for a given delta. More... | |
av_cold int | ff_bgmc_init (void *logctx, uint8_t **cf_lut, int **cf_lut_status) |
Initialize the lookup table arrays. More... | |
av_cold void | ff_bgmc_end (uint8_t **cf_lut, int **cf_lut_status) |
Release the lookup table arrays. More... | |
int | ff_bgmc_decode_init (GetBitContext *gb, unsigned int *h, unsigned int *l, unsigned int *v) |
Initialize decoding and reads the first value. More... | |
void | ff_bgmc_decode_end (GetBitContext *gb) |
Finish decoding. More... | |
void | ff_bgmc_decode (GetBitContext *gb, unsigned int num, int32_t *dst, int delta, unsigned int sx, unsigned int *h, unsigned int *l, unsigned int *v, uint8_t *cf_lut, int *cf_lut_status) |
Read and decode a block Gilbert-Moore coded symbol. More... | |
Variables | |
static const uint16_t | cf_tables_1 [3][129] |
Cumulative frequency tables for block Gilbert-Moore coding. More... | |
static const uint16_t | cf_tables_2 [8][193] |
static const uint16_t | cf_tables_3 [5][257] |
static const uint16_t *const | cf_table [16] |
#define TOP_VALUE ((1 << VALUE_BITS) - 1) |
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Initialize a given lookup table using a given delta.
Definition at line 427 of file bgmc.c.
Referenced by bgmc_lut_getp().
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Retune the index of a suitable lookup table for a given delta.
Definition at line 447 of file bgmc.c.
Referenced by ff_bgmc_decode().
av_cold int ff_bgmc_init | ( | void * | logctx, |
uint8_t ** | cf_lut, | ||
int ** | cf_lut_status | ||
) |
Initialize the lookup table arrays.
Definition at line 461 of file bgmc.c.
Referenced by decode_init().
av_cold void ff_bgmc_end | ( | uint8_t ** | cf_lut, |
int ** | cf_lut_status | ||
) |
Release the lookup table arrays.
Definition at line 481 of file bgmc.c.
Referenced by decode_end(), and ff_bgmc_init().
int ff_bgmc_decode_init | ( | GetBitContext * | gb, |
unsigned int * | h, | ||
unsigned int * | l, | ||
unsigned int * | v | ||
) |
Initialize decoding and reads the first value.
Definition at line 489 of file bgmc.c.
Referenced by read_var_block_data().
void ff_bgmc_decode_end | ( | GetBitContext * | gb | ) |
void ff_bgmc_decode | ( | GetBitContext * | gb, |
unsigned int | num, | ||
int32_t * | dst, | ||
int | delta, | ||
unsigned int | sx, | ||
unsigned int * | h, | ||
unsigned int * | l, | ||
unsigned int * | v, | ||
uint8_t * | cf_lut, | ||
int * | cf_lut_status | ||
) |
Read and decode a block Gilbert-Moore coded symbol.
Definition at line 511 of file bgmc.c.
Referenced by read_var_block_data().
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Definition at line 418 of file bgmc.c.
Referenced by bgmc_lut_fillp(), and ff_bgmc_decode().