audio_portaudio_source Class Reference

#include <audio_portaudio_source.h>

Inheritance diagram for audio_portaudio_source:

gr_sync_block gr_block

List of all members.


Detailed Description

\ Audio source using PORTAUDIO

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

Public Member Functions

 ~audio_portaudio_source ()
bool check_topology (int ninputs, int noutputs)
 Confirm that ninputs and noutputs is an acceptable combination.
int work (int ninput_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_portaudio_source (int sampling_rate, const std::string device_name, bool ok_to_block)

Friends

PaStreamCallback portaudio_source_callback
audio_portaudio_source_sptr audio_portaudio_make_source (int sampling_rate, const std::string device_name, bool ok_to_block)


Constructor & Destructor Documentation

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

audio_portaudio_source::~audio_portaudio_source (  ) 


Member Function Documentation

bool audio_portaudio_source::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_block.

References NULL, and portaudio_source_callback.

int audio_portaudio_source::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.

References min(), and omni_semaphore::wait().


Friends And Related Function Documentation

friend PaStreamCallback portaudio_source_callback [friend]

Referenced by check_topology().

audio_portaudio_source_sptr audio_portaudio_make_source ( int  sampling_rate,
const std::string  device_name,
bool  ok_to_block 
) [friend]

audio source.

Parameters:
sampling_rate sampling rate in Hz
dev PORTAUDIO device name, e.g., "pa:"
ok_to_block true if it's ok for us to block


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

Generated on Wed Oct 8 09:09:05 2008 for GNU Radio 3.0.4 by  doxygen 1.5.6