g711.h File Reference

#include "ws_symbol_export.h"

Go to the source code of this file.

Functions
WS_DLL_PUBLIC unsigned char	linear2alaw (int pcm_val)
	Converts a 16-bit linear PCM value to 8-bit A-law encoded format.
WS_DLL_PUBLIC int	alaw2linear (unsigned char a_val)
	Converts an 8-bit A-law encoded value to a 16-bit linear PCM value.
WS_DLL_PUBLIC unsigned char	linear2ulaw (int pcm_val)
	Converts a 16-bit linear PCM value to u-law encoded format.
WS_DLL_PUBLIC int	ulaw2linear (unsigned char u_val)
	Converts a u-law encoded value to a 16-bit linear PCM value.

Detailed Description

Definitions for routines for u-law, A-law and linear PCM conversions

Wireshark - Network traffic analyzer By Gerald Combs geral.nosp@m.d@wi.nosp@m.resha.nosp@m.rk.o.nosp@m.rg Copyright 1998 Gerald Combs

SPDX-License-Identifier: GPL-2.0-or-later

Function Documentation

alaw2linear()

WS_DLL_PUBLIC int alaw2linear

(

unsigned char

a_val

)

Converts an 8-bit A-law encoded value to a 16-bit linear PCM value.

Decodes an 8-bit A-law value back into a signed 16-bit linear PCM value.

Parameters

a_val

The 8-bit A-law encoded value.

Returns

The corresponding 16-bit linear PCM value.

linear2alaw()

WS_DLL_PUBLIC unsigned char linear2alaw

(

int

pcm_val

)

Converts a 16-bit linear PCM value to 8-bit A-law encoded format.

Encodes a signed 16-bit linear PCM value into an 8-bit A-law value, commonly used in telephony systems to compress audio data.

Parameters

pcm_val

The 16-bit linear PCM value to encode.

Returns

The corresponding 8-bit A-law encoded value.

linear2ulaw()

WS_DLL_PUBLIC unsigned char linear2ulaw

(

int

pcm_val

)

Converts a 16-bit linear PCM value to u-law encoded format.

Encodes a signed 16-bit linear PCM value into an 8-bit u-law value, used in North American and Japanese telephony systems for audio compression.

Parameters

pcm_val

The 16-bit linear PCM value to encode.

Returns

The corresponding 8-bit u-law encoded value.

ulaw2linear()

WS_DLL_PUBLIC int ulaw2linear

(

unsigned char

u_val

)

Converts a u-law encoded value to a 16-bit linear PCM value.

Decodes an 8-bit u-law value back into a signed 16-bit linear PCM value.

Parameters

u_val

The 8-bit u-law encoded value.

Returns

The corresponding 16-bit linear PCM value.