tone_generate.h File Reference

Go to the source code of this file.

Defines
#define	_SPANDSP_TONE_GENERATE_H_
#define	make_tone_gen_descriptor   tone_gen_descriptor_init
Typedefs
typedef tone_gen_tone_descriptor_s	tone_gen_tone_descriptor_t
typedef tone_gen_descriptor_s	tone_gen_descriptor_t
typedef tone_gen_state_s	tone_gen_state_t
Functions
tone_gen_descriptor_t *	tone_gen_descriptor_init (tone_gen_descriptor_t *s, int f1, int l1, int f2, int l2, int d1, int d2, int d3, int d4, int repeat)
	Create a tone generator descriptor.
void	tone_gen_descriptor_free (tone_gen_descriptor_t *s)
	SPAN_DECLARE_NONSTD (int) tone_gen(tone_gen_state_t *s
	Get the next bit of data from a T.38 rate adapting non-ECM buffer context.
tone_gen_state_t *	tone_gen_init (tone_gen_state_t *s, tone_gen_descriptor_t *t)
int	tone_gen_release (tone_gen_state_t *s)
int	tone_gen_free (tone_gen_state_t *s)
Variables
int16_t	amp []
int16_t int	max_samples

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Detailed Description

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Typedef Documentation

typedef struct tone_gen_descriptor_s tone_gen_descriptor_t

Cadenced multi-tone generator descriptor.

typedef struct tone_gen_state_s tone_gen_state_t

Cadenced multi-tone generator state descriptor. This defines the state of a single working instance of a generator.

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Function Documentation

SPAN_DECLARE_NONSTD

(

int

)

Get the next bit of data from a T.38 rate adapting non-ECM buffer context.

Process a block of received FAX audio samples.

Parameters:

	s	The T.38 context.
	amp	The audio sample buffer.
	len	The number of samples in the buffer.

Returns:

The number of samples unprocessed.

tone_gen_descriptor_t* tone_gen_descriptor_init	(	tone_gen_descriptor_t *	s,
		int	f1,
		int	l1,
		int	f2,
		int	l2,
		int	d1,
		int	d2,
		int	d3,
		int	d4,
		int	repeat
	)

Create a tone generator descriptor.

Create a tone generator descriptor

Parameters:

	s	The descriptor
	f1	The first frequency, in Hz
	l1	The level of the first frequency, in dBm0
	f2	0 for no second frequency, a positive number for the second frequency, in Hz, or a negative number for an AM modulation frequency, in Hz
	l2	The level of the second frequency, in dBm0, or the percentage modulation depth for an AM modulated tone.
	d1	x
	d2	x
	d3	x
	d4	x
	repeat	x

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