gsm0610_decode.c File Reference

#include <assert.h>
#include <inttypes.h>
#include "floating_fudge.h"
#include <stdlib.h>
#include <memory.h>
#include "spandsp/telephony.h"
#include "spandsp/bitstream.h"
#include "spandsp/saturated.h"
#include "spandsp/gsm0610.h"
#include "gsm0610_local.h"

Functions
int	gsm0610_unpack_none (gsm0610_frame_t *s, const uint8_t c[])
int	gsm0610_unpack_wav49 (gsm0610_frame_t *s, const uint8_t c[])
int	gsm0610_unpack_voip (gsm0610_frame_t *s, const uint8_t c[33])
int	gsm0610_decode (gsm0610_state_t *s, int16_t amp[], const uint8_t code[], int len)

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Detailed Description

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Function Documentation

int gsm0610_decode	(	gsm0610_state_t *	s,
		int16_t	amp[],
		const uint8_t	code[],
		int	len
	)

Decode a buffer of GSM 06.10 data to linear PCM.

Parameters:

	s	The GSM 06.10 context.
	amp	The audio sample buffer.
	code	The GSM 06.10 data.
	len	The number of bytes of GSM 06.10 data to be decoded.

Returns:

The number of samples returned.

References gsm0610_unpack_wav49(), and gsm0610_state_t::packing.

int gsm0610_unpack_wav49	(	gsm0610_frame_t *	s,
		const uint8_t	c[]
	)

Unpack a pair of GSM 06.10 frames from the format used for wave files (wave type 49).

Parameters:

	s	A pointer to a buffer into which the frames will be packed.
	c	The buffer containing the data to be unpacked. This must be at least 65 bytes long.

Returns:

The number of bytes absorbed.

References gsm0610_frame_t::bc, gsm0610_frame_t::LARc, gsm0610_frame_t::Mc, gsm0610_frame_t::Nc, gsm0610_frame_t::xmaxc, and gsm0610_frame_t::xMc.

Referenced by gsm0610_decode().