libavcodec/sonic.c File Reference

Simple free lossless/lossy audio codec Based on Paul Francis Harrison's Bonk (http://www.logarithmic.net/pfh/bonk) Written and designed by Alex Beregszaszi. More...

#include "avcodec.h"
#include "bitstream.h"
#include "golomb.h"

Go to the source code of this file.

Data Structures
struct	SonicContext
Defines
#define	MAX_CHANNELS   2
#define	MID_SIDE   0
#define	LEFT_SIDE   1
#define	RIGHT_SIDE   2
#define	LATTICE_SHIFT   10
#define	SAMPLE_SHIFT   4
#define	LATTICE_FACTOR   (1 << LATTICE_SHIFT)
#define	SAMPLE_FACTOR   (1 << SAMPLE_SHIFT)
#define	BASE_QUANT   0.6
#define	RATE_VARIATION   3.0
Typedefs
typedef struct SonicContext	SonicContext
Functions
static int	divide (int a, int b)
static int	shift (int a, int b)
static int	shift_down (int a, int b)
static int	intlist_write (PutBitContext *pb, int *buf, int entries, int base_2_part)
static int	intlist_read (GetBitContext *gb, int *buf, int entries, int base_2_part)
static void	predictor_init_state (int *k, int *state, int order)
static int	predictor_calc_error (int *k, int *state, int order, int error)
Variables
static const int	samplerate_table []

---

Detailed Description

Simple free lossless/lossy audio codec Based on Paul Francis Harrison's Bonk (http://www.logarithmic.net/pfh/bonk) Written and designed by Alex Beregszaszi.

TODO:

• CABAC put/get_symbol
• independent quantizer for channels
• >2 channels support
• more decorrelation types
• more tap_quant tests
• selectable intlist writers/readers (bonk-style, golomb, cabac)

Definition in file sonic.c.

---

Define Documentation

#define BASE_QUANT   0.6

Definition at line 74 of file sonic.c.

#define LATTICE_FACTOR   (1 << LATTICE_SHIFT)

Definition at line 71 of file sonic.c.

#define LATTICE_SHIFT   10

Definition at line 69 of file sonic.c.

Referenced by predictor_calc_error(), and predictor_init_state().

#define LEFT_SIDE   1

Definition at line 43 of file sonic.c.

#define MAX_CHANNELS   2

Definition at line 40 of file sonic.c.

#define MID_SIDE   0

Definition at line 42 of file sonic.c.

#define RATE_VARIATION   3.0

Definition at line 75 of file sonic.c.

#define RIGHT_SIDE   2

Definition at line 44 of file sonic.c.

#define SAMPLE_FACTOR   (1 << SAMPLE_SHIFT)

Definition at line 72 of file sonic.c.

Referenced by predictor_calc_error().

#define SAMPLE_SHIFT   4

Definition at line 70 of file sonic.c.

---

Typedef Documentation

typedef struct SonicContext SonicContext

---

Function Documentation

static int divide	(	int	a,
		int	b
	)			[inline, static]

Definition at line 77 of file sonic.c.

static int intlist_read	(	GetBitContext *	gb,
		int *	buf,
		int	entries,
		int	base_2_part
	)			[inline, static]

Definition at line 106 of file sonic.c.

static int intlist_write	(	PutBitContext *	pb,
		int *	buf,
		int	entries,
		int	base_2_part
	)			[inline, static]

Definition at line 96 of file sonic.c.

static int predictor_calc_error	(	int *	k,
		int *	state,
		int	order,
		int	error
	)			[static]

Definition at line 381 of file sonic.c.

static void predictor_init_state	(	int *	k,
		int *	state,
		int	order
	)			[static]

Definition at line 364 of file sonic.c.

static int shift	(	int	a,
		int	b
	)			[inline, static]

Definition at line 85 of file sonic.c.

Referenced by adpcm_decode_frame(), bfi_decode_frame(), bidir_refine(), calc_predictor_params(), check_input_motion(), direct_search(), dpcm_decode_frame(), encode_frame(), encode_q_branch(), encode_residual(), epzs_motion_search2(), epzs_motion_search4(), epzs_motion_search_internal(), ff_convert_matrix(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_pre_estimate_p_frame_motion(), ff_print_debug_info(), init_dequant4_coeff_table(), init_dequant8_coeff_table(), initFilter(), main(), prefetch_motion(), read_line(), renorm_cabac_decoder_once(), sab_diamond_search(), and vc1_mspel_mc().

static int shift_down	(	int	a,
		int	b
	)			[inline, static]

Definition at line 90 of file sonic.c.

Referenced by predictor_calc_error(), and predictor_init_state().

---

Variable Documentation

const int samplerate_table[] [static]

Initial value:

    { 44100, 22050, 11025, 96000, 48000, 32000, 24000, 16000, 8000 }

Definition at line 484 of file sonic.c.