audio sink using ALSA More...

#include <audio_alsa_sink.h>

Inheritance diagram for audio_alsa_sink:

Public Member Functions
	~audio_alsa_sink ()
bool	check_topology (int ninputs, int noutputs)
	Confirm that ninputs and noutputs is an acceptable combination.
int	work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
	just like gr_block::general_work, only this arranges to call consume_each for you
Protected Member Functions
	audio_alsa_sink (int sampling_rate, const std::string device_name, bool ok_to_block)
bool	write_buffer (const void *buffer, unsigned nframes, unsigned sizeof_frame)
int	work_s16 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
int	work_s16_1x2 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
int	work_s32 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
int	work_s32_1x2 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
Friends
audio_alsa_sink_sptr	audio_alsa_make_sink (int sampling_rate, const std::string device_name, bool ok_to_block)
	make an alsa audio sink.

Detailed Description

audio sink using ALSA

The sink has N input streams of floats, where N depends on the hardware characteristics of the selected device.

Input samples must be in the range [-1,1].

Constructor & Destructor Documentation

audio_alsa_sink::audio_alsa_sink	(	int	sampling_rate,
		const std::string	device_name,
		bool	ok_to_block
	)		`[protected]`

audio_alsa_sink::~audio_alsa_sink ( )

Member Function Documentation

bool audio_alsa_sink::check_topology	(	int	ninputs,
		int	noutputs
	)		`[virtual]`

Confirm that ninputs and noutputs is an acceptable combination.

Parameters:

ninputs	number of input streams connected
noutputs	number of output streams connected

Returns:: true if this is a valid configuration for this block.

This function is called by the runtime system whenever the topology changes. Most classes do not need to override this. This check is in addition to the constraints specified by the input and output gr_io_signatures.

Reimplemented from gr_basic_block.

int audio_alsa_sink::work	(	int	noutput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)		`[virtual]`

just like gr_block::general_work, only this arranges to call consume_each for you

The user must override work to define the signal processing code

Implements gr_sync_block.

int audio_alsa_sink::work_s16	(	int	noutput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)		`[protected]`

int audio_alsa_sink::work_s16_1x2	(	int	noutput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)		`[protected]`

int audio_alsa_sink::work_s32	(	int	noutput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)		`[protected]`

int audio_alsa_sink::work_s32_1x2	(	int	noutput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)		`[protected]`

bool audio_alsa_sink::write_buffer	(	const void *	buffer,
		unsigned	nframes,
		unsigned	sizeof_frame
	)		`[protected]`

Friends And Related Function Documentation

audio_alsa_sink_sptr audio_alsa_make_sink	(	int	sampling_rate,
		const std::string	device_name,
		bool	ok_to_block
	)		`[friend]`

make an alsa audio sink.

Parameters:

sampling_rate	sampling rate in Hz
device_name	ALSA pcm device name, e.g., "hw:0,0"
ok_to_block	(currently ignored)

The documentation for this class was generated from the following file:

audio_alsa_sink.h

Public Member Functions

Protected Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation