8svx.c File Reference

8svx audio decoder More...

#include "avcodec.h"
#include "internal.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   32768
 

Typedefs

typedef struct EightSvxContext EightSvxContext
 decoder context More...
 

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 void raw_decode (uint8_t *dst, const int8_t *src, int src_size)
 
static int eightsvx_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
 decode a frame More...
 
static av_cold int eightsvx_decode_init (AVCodecContext *avctx)
 initialize 8svx decoder More...
 
static av_cold int eightsvx_decode_close (AVCodecContext *avctx)
 

Variables

static const int8_t fibonacci [16]
 
static const int8_t exponential [16]
 
AVCodec ff_eightsvx_fib_decoder
 
AVCodec ff_eightsvx_exp_decoder
 
AVCodec ff_pcm_s8_planar_decoder
 

Detailed Description

8svx audio decoder

Author
Jaikrishnan Menon

supports: fibonacci delta encoding : exponential encoding

Definition in file 8svx.c.

Macro Definition Documentation

#define MAX_FRAME_SIZE   32768

Definition at line 53 of file 8svx.c.

Referenced by eightsvx_decode_frame().

Typedef Documentation

decoder context

Function Documentation

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]statestarting value. it is saved for use in the next call.

Definition at line 61 of file 8svx.c.

Referenced by eightsvx_decode_frame().

static av_cold int eightsvx_decode_close ( AVCodecContext avctx)
static

Definition at line 193 of file 8svx.c.

static int eightsvx_decode_frame ( AVCodecContext avctx,
void data,
int *  got_frame_ptr,
AVPacket avpkt 
)
static

decode a frame

Definition at line 84 of file 8svx.c.

static av_cold int eightsvx_decode_init ( AVCodecContext avctx)
static

initialize 8svx decoder

Definition at line 164 of file 8svx.c.

static void raw_decode ( uint8_t dst,
const int8_t *  src,
int  src_size 
)
static

Definition at line 77 of file 8svx.c.

Referenced by eightsvx_decode_frame().

Variable Documentation

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

Definition at line 50 of file 8svx.c.

Referenced by eightsvx_decode_init().

AVCodec ff_eightsvx_exp_decoder
Initial value:
= {
.name = "8svx_exp",
.priv_data_size = sizeof (EightSvxContext),
.capabilities = CODEC_CAP_DELAY | CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("8SVX exponential"),
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
}

Definition at line 217 of file 8svx.c.

AVCodec ff_eightsvx_fib_decoder
Initial value:
= {
.name = "8svx_fib",
.priv_data_size = sizeof (EightSvxContext),
.capabilities = CODEC_CAP_DELAY | CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("8SVX fibonacci"),
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
}

Definition at line 203 of file 8svx.c.

AVCodec ff_pcm_s8_planar_decoder
Initial value:
= {
.name = "pcm_s8_planar",
.priv_data_size = sizeof(EightSvxContext),
.capabilities = CODEC_CAP_DELAY | CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("PCM signed 8-bit planar"),
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
}

Definition at line 231 of file 8svx.c.

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

Definition at line 48 of file 8svx.c.

Referenced by eightsvx_decode_init().