#include <math.h>
#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "fft.h"
#include "internal.h"

Data Structures
struct	TwinVQFrameMode
	Parameters and tables that are different for each frame type. More...

struct	TwinVQFrameData

struct	TwinVQModeTab
	Parameters and tables that are different for every combination of bitrate/sample rate. More...

struct	TwinVQContext

Macros
#define	TWINVQ_PPC_SHAPE_CB_SIZE 64

#define	TWINVQ_PPC_SHAPE_LEN_MAX 60

#define	TWINVQ_SUB_AMP_MAX 4500.0

#define	TWINVQ_MULAW_MU 100.0

#define	TWINVQ_GAIN_BITS 8

#define	TWINVQ_AMP_MAX 13000.0

#define	TWINVQ_SUB_GAIN_BITS 5

#define	TWINVQ_WINDOW_TYPE_BITS 4

#define	TWINVQ_PGAIN_MU 200

#define	TWINVQ_LSP_COEFS_MAX 20

#define	TWINVQ_LSP_SPLIT_MAX 4

#define	TWINVQ_CHANNELS_MAX 2

#define	TWINVQ_SUBBLOCKS_MAX 16

#define	TWINVQ_BARK_N_COEF_MAX 4

#define	TWINVQ_MAX_FRAMES_PER_PACKET 2

Enumerations
enum	TwinVQCodec { TWINVQ_CODEC_VQF, TWINVQ_CODEC_METASOUND }

enum	TwinVQFrameType { TWINVQ_FT_SHORT = 0, TWINVQ_FT_MEDIUM, TWINVQ_FT_LONG, TWINVQ_FT_PPC }

Functions
static void	twinvq_memset_float (float *buf, float val, int size)

static float	twinvq_mulawinv (float y, float clip, float mu)

int	ff_twinvq_decode_frame (AVCodecContext avctx, void data, int got_frame_ptr, AVPacket avpkt)

int	ff_twinvq_decode_close (AVCodecContext *avctx)

int	ff_twinvq_decode_init (AVCodecContext *avctx)

Variables
enum TwinVQFrameType	ff_twinvq_wtype_to_ftype_table []

Macro Definition Documentation

#define TWINVQ_PPC_SHAPE_CB_SIZE 64

Definition at line 46 of file twinvq.h.

Referenced by read_and_decode_spectrum().

#define TWINVQ_PPC_SHAPE_LEN_MAX 60

Definition at line 47 of file twinvq.h.

Referenced by read_and_decode_spectrum().

#define TWINVQ_SUB_AMP_MAX 4500.0

Definition at line 48 of file twinvq.h.

Referenced by dec_gain().

#define TWINVQ_MULAW_MU 100.0

Definition at line 49 of file twinvq.h.

Referenced by dec_gain().

#define TWINVQ_GAIN_BITS 8

Definition at line 50 of file twinvq.h.

Referenced by dec_gain(), init_bitstream_params(), metasound_read_bitstream(), and twinvq_read_bitstream().

#define TWINVQ_AMP_MAX 13000.0

Definition at line 51 of file twinvq.h.

Referenced by dec_gain().

#define TWINVQ_SUB_GAIN_BITS 5

Definition at line 52 of file twinvq.h.

Referenced by dec_gain(), init_bitstream_params(), metasound_read_bitstream(), and twinvq_read_bitstream().

#define TWINVQ_WINDOW_TYPE_BITS 4

Definition at line 53 of file twinvq.h.

Referenced by init_bitstream_params(), metasound_read_bitstream(), and twinvq_read_bitstream().

#define TWINVQ_PGAIN_MU 200

Definition at line 54 of file twinvq.h.

Referenced by decode_ppc().

#define TWINVQ_LSP_COEFS_MAX 20

Definition at line 55 of file twinvq.h.

Referenced by read_and_decode_spectrum().

#define TWINVQ_LSP_SPLIT_MAX 4

Definition at line 56 of file twinvq.h.

#define TWINVQ_CHANNELS_MAX 2

Definition at line 57 of file twinvq.h.

Referenced by metasound_decode_init(), read_and_decode_spectrum(), and twinvq_decode_init().

#define TWINVQ_SUBBLOCKS_MAX 16

Definition at line 58 of file twinvq.h.

Referenced by read_and_decode_spectrum().

#define TWINVQ_BARK_N_COEF_MAX 4

Definition at line 59 of file twinvq.h.

#define TWINVQ_MAX_FRAMES_PER_PACKET 2

Definition at line 61 of file twinvq.h.

Referenced by ff_twinvq_decode_init().

Enumeration Type Documentation

enum TwinVQCodec

Enumerator
TWINVQ_CODEC_VQF
TWINVQ_CODEC_METASOUND

Definition at line 34 of file twinvq.h.

enum TwinVQFrameType

Enumerator
TWINVQ_FT_SHORT	Short frame (divided in n sub-blocks)
TWINVQ_FT_MEDIUM	Medium frame (divided in m<n sub-blocks)
TWINVQ_FT_LONG	Long frame (single sub-block + PPC)
TWINVQ_FT_PPC	Periodic Peak Component (part of the long frame)