8svx.c File Reference

#include "config_components.h"
#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "libavutil/common.h"

Go to the source code of this file.

Data Structures
struct	EightSvxContext
	decoder context More...

Macros
#define	MAX_FRAME_SIZE   2048

Functions
static void	delta_decode (uint8_t *dst, const uint8_t *src, int src_size, uint8_t *state, const int8_t *table)
	Delta decode the compressed values in src, and put the resulting decoded samples in dst. More...
static int	eightsvx_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
	decode a frame More...
static av_cold int	eightsvx_decode_init (AVCodecContext *avctx)
static av_cold int	eightsvx_decode_close (AVCodecContext *avctx)

Variables
static const int8_t	fibonacci [16] = { -34, -21, -13, -8, -5, -3, -2, -1, 0, 1, 2, 3, 5, 8, 13, 21 }
static const int8_t	exponential [16] = { -128, -64, -32, -16, -8, -4, -2, -1, 0, 1, 2, 4, 8, 16, 32, 64 }

Detailed Description

8svx audio decoder

Author

Jaikrishnan Menon

supports: fibonacci delta encoding : exponential encoding

For more information about the 8SVX format: http://netghost.narod.ru/gff/vendspec/iff/iff.txt http://sox.sourceforge.net/AudioFormats-11.html http://aminet.net/package/mus/misc/wavepak http://amigan.1emu.net/reg/8SVX.txt

Samples can be found here: http://aminet.net/mods/smpl/

Definition in file 8svx.c.

Macro Definition Documentation

MAX_FRAME_SIZE

#define MAX_FRAME_SIZE   2048

Definition at line 64 of file 8svx.c.

Function Documentation

delta_decode()

static void delta_decode ( uint8_t *  dst, const uint8_t *  src, int  src_size, uint8_t *  state, const int8_t *  table  )

static

Delta decode the compressed values in src, and put the resulting decoded samples in dst.

Parameters

[in,out]	state	starting value. it is saved for use in the next call.
	table	delta sequence table

Definition at line 73 of file 8svx.c.

Referenced by eightsvx_decode_frame().

eightsvx_decode_frame()

static int eightsvx_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame_ptr, AVPacket *  avpkt  )

static

decode a frame

Definition at line 90 of file 8svx.c.

eightsvx_decode_init()

static av_cold int eightsvx_decode_init ( AVCodecContext *  avctx )

static

Definition at line 158 of file 8svx.c.

eightsvx_decode_close()

static av_cold int eightsvx_decode_close ( AVCodecContext *  avctx )

static

Definition at line 178 of file 8svx.c.

Variable Documentation

fibonacci

const int8_t fibonacci[16] = { -34, -21, -13, -8, -5, -3, -2, -1, 0, 1, 2, 3, 5, 8, 13, 21 }

static

Definition at line 61 of file 8svx.c.

Referenced by eightsvx_decode_init().

exponential

const int8_t exponential[16] = { -128, -64, -32, -16, -8, -4, -2, -1, 0, 1, 2, 4, 8, 16, 32, 64 }

static

Definition at line 62 of file 8svx.c.

Referenced by eightsvx_decode_init().