adpcm_data.h File Reference

ADPCM tables. More...

#include <stdint.h>

Go to the source code of this file.

Variables
static const uint8_t	ff_adpcm_ima_block_sizes [4] = { 4, 12, 4, 20 }
static const uint8_t	ff_adpcm_ima_block_samples [4] = { 16, 32, 8, 32 }
const int8_t *const	ff_adpcm_index_tables [4]
const int8_t	ff_adpcm_index_table [16]
const int16_t	ff_adpcm_step_table [89]
	This is the step table.
const int16_t	ff_adpcm_oki_step_table [49]
const int16_t	ff_adpcm_AdaptationTable []
const uint8_t	ff_adpcm_AdaptCoeff1 []
	Divided by 4 to fit in 8-bit integers.
const int8_t	ff_adpcm_AdaptCoeff2 []
	Divided by 4 to fit in 8-bit integers.
const int16_t	ff_adpcm_yamaha_indexscale []
const int8_t	ff_adpcm_yamaha_difflookup []
const int16_t	ff_adpcm_afc_coeffs [2][16]

Detailed Description

ADPCM tables.

Definition in file adpcm_data.h.

Variable Documentation

const uint8_t ff_adpcm_ima_block_sizes[4] = { 4, 12, 4, 20 }

static

Definition at line 31 of file adpcm_data.h.

Referenced by get_nb_samples().

const uint8_t ff_adpcm_ima_block_samples[4] = { 16, 32, 8, 32 }

static

Definition at line 32 of file adpcm_data.h.

Referenced by adpcm_decode_frame(), and get_nb_samples().

const int8_t* const ff_adpcm_index_tables[4]

Definition at line 50 of file adpcm_data.c.

Referenced by adpcm_ima_wav_expand_nibble().

const int8_t ff_adpcm_index_table[16]

Definition at line 40 of file adpcm_data.c.

Referenced by adpcm_compress_trellis(), adpcm_ima_compress_sample(), adpcm_ima_expand_nibble(), adpcm_ima_oki_expand_nibble(), adpcm_ima_qt_compress_sample(), and adpcm_ima_qt_expand_nibble().

const int16_t ff_adpcm_step_table[89]

This is the step table.

Note that many programs use slight deviations from this table, but such deviations are negligible:

Definition at line 61 of file adpcm_data.c.

Referenced by adpcm_compress_trellis(), adpcm_ima_compress_sample(), adpcm_ima_expand_nibble(), adpcm_ima_qt_compress_sample(), adpcm_ima_qt_expand_nibble(), adpcm_ima_wav_expand_nibble(), adpcm_swf_decode(), decode_frame(), and decode_init().

const int16_t ff_adpcm_oki_step_table[49]

Definition at line 73 of file adpcm_data.c.

Referenced by adpcm_ima_oki_expand_nibble().

const int16_t ff_adpcm_AdaptationTable[]

Definition at line 84 of file adpcm_data.c.

Referenced by adpcm_compress_trellis(), adpcm_ct_expand_nibble(), adpcm_ms_compress_sample(), and adpcm_ms_expand_nibble().

const uint8_t ff_adpcm_AdaptCoeff1[]

Divided by 4 to fit in 8-bit integers.

Definition at line 90 of file adpcm_data.c.

Referenced by adpcm_decode_frame(), and adpcm_encode_init().

const int8_t ff_adpcm_AdaptCoeff2[]

Divided by 4 to fit in 8-bit integers.

Definition at line 95 of file adpcm_data.c.

Referenced by adpcm_decode_frame(), and adpcm_encode_init().

const int16_t ff_adpcm_yamaha_indexscale[]

Definition at line 99 of file adpcm_data.c.

Referenced by adpcm_compress_trellis(), adpcm_yamaha_compress_sample(), and adpcm_yamaha_expand_nibble().

const int8_t ff_adpcm_yamaha_difflookup[]

Definition at line 104 of file adpcm_data.c.

Referenced by adpcm_ima_compress_sample(), adpcm_yamaha_compress_sample(), and adpcm_yamaha_expand_nibble().

const int16_t ff_adpcm_afc_coeffs[2][16]

Definition at line 109 of file adpcm_data.c.

Referenced by adpcm_decode_frame().