Five Linux and Sound
Posted: Thu Jul 02, 2009 1:34 am
This board is looking a little quiet with no new posts in more than 6 months.
I have a need to record voice for subsequent transcription and there wasn't a Linux package available that I could see that fitted my needs (gnome-voice-recorder didn't have pause functionality, Audacity made the process too complex although it is a wonderful package etc). Plus I would have had to shell out to those packages and then try to update the records that my software is keeping.
Then I came across ecasound which is a command line audio package with an interactive mode and a C library for accessing that interactive mode. I have quickly thrown together an (x)Harbour class and interface and shown that I can record audio direct from (x)Harbour. Playing audio files should be straight forward as well although I have yet to test that capability as I don't need it at the moment.
If anyone is interested in this let me know. ecasound only has partial support under windows through cygwin so it may well not be worth pursuing for FiveWin people.
For Ubuntu you need the following packages: ecasound libecasoundc2.2-dev
The C code for the interface is simple enough:
And the (x)Harbour class is pretty simple too
This code works but is not a complete or finished product. The TSound Class currently only taps in to may be 10% of the functionality provided by ecasound. However extension of the class should be easy and straight forward.
I have a need to record voice for subsequent transcription and there wasn't a Linux package available that I could see that fitted my needs (gnome-voice-recorder didn't have pause functionality, Audacity made the process too complex although it is a wonderful package etc). Plus I would have had to shell out to those packages and then try to update the records that my software is keeping.
Then I came across ecasound which is a command line audio package with an interactive mode and a C library for accessing that interactive mode. I have quickly thrown together an (x)Harbour class and interface and shown that I can record audio direct from (x)Harbour. Playing audio files should be straight forward as well although I have yet to test that capability as I don't need it at the moment.
If anyone is interested in this let me know. ecasound only has partial support under windows through cygwin so it may well not be worth pursuing for FiveWin people.
For Ubuntu you need the following packages: ecasound libecasoundc2.2-dev
The C code for the interface is simple enough:
Code: Select all
/*
xecasound.c
*/
#include <hbapi.h>
#include </usr/include/libecasoundc/ecasoundc.h>
HB_FUNC( ECAS_INIT )
{
eci_init();
}
HB_FUNC( ECAS_CLEANUP )
{
eci_cleanup();
}
HB_FUNC( ECAS_COMMAND )
{
eci_command( hb_parc( 1 ) );
}
HB_FUNC( ECAS_LAST_INTEGER )
{
int last_return;
last_return = eci_last_integer();
hb_retni( last_return );
}
HB_FUNC( ECAS_LAST_STRING )
{
hb_retc( eci_last_string() );
}
HB_FUNC( ECAS_LAST_FLOAT )
{
double last_double;
last_double = (double) eci_last_float();
hb_retnd( last_double );
}
Code: Select all
/*
sound.prg
*/
#include <hbclass.ch>
CLASS TSound
METHOD New()
METHOD Initialise()
METHOD Cleanup()
METHOD ExecuteCommand( str_command )
METHOD GetLastInteger()
METHOD GetLastString()
METHOD GetLastFloat()
METHOD GetError()
METHOD AddAudioInput( str_input )
METHOD AddAudioOutput( str_output )
METHOD LaunchEngine()
METHOD Start()
METHOD Stop()
METHOD Quit()
METHOD AddChainSet( str_chainsetname )
METHOD AddChain( str_chainname )
METHOD ConnectChainSet()
METHOD GetEngineStatus()
METHOD GetConnectedChainSet()
METHOD SetLogHistoryLength()
METHOD GetLog()
METHOD AudioInputList()
METHOD AudioOutputList()
METHOD AudioInputLength()
METHOD AudioInputPosition()
METHOD AudioOutputPosition()
ENDCLASS
METHOD New() CLASS TSound
RETURN self
METHOD Initialise() CLASS TSound
ECAS_Init()
RETURN nil
METHOD Cleanup() CLASS TSound
ECAS_Cleanup()
RETURN nil
METHOD ExecuteCommand( str_command ) CLASS TSound
ECAS_Command( str_command )
RETURN nil
METHOD GetLastInteger() CLASS TSound
RETURN ECAS_Last_Integer()
METHOD GetLastString() CLASS TSound
RETURN ECAS_Last_String()
METHOD GetLastFloat() CLASS TSound
RETURN ECAS_Last_Float()
METHOD GetError() CLASS TSound
::ExecuteCommand( "eci-error" )
RETURN ::GetLastInteger()
METHOD AddAudioInput( str_input ) CLASS TSound
::ExecuteCommand( "ai-add " + str_input )
RETURN nil
METHOD LaunchEngine() CLASS TSound
::ExecuteCommand( "engine-launch" )
RETURN nil
METHOD AddAudioOutput( str_output ) CLASS TSound
::ExecuteCommand("ao-add " + str_output )
RETURN nil
METHOD Start() CLASS TSound
::ExecuteCommand( "start" )
RETURN nil
METHOD Stop() CLASS TSound
::ExecuteCommand( "stop" )
RETURN nil
METHOD Quit() CLASS TSound
::ExecuteCommand( "quit" )
RETURN nil
METHOD AddChainSet( str_chainsetname ) CLASS TSound
::ExecuteCommand( "cs-add " + str_chainsetname )
RETURN nil
METHOD ConnectChainSet() CLASS TSound
::ExecuteCommand( "cs-connect" )
RETURN nil
METHOD AddChain( str_chainname ) CLASS TSound
::ExecuteCommand( "c-add " + str_chainname )
RETURN nil
METHOD GetEngineStatus() CLASS TSound
::ExecuteCommand( "engine-status" )
RETURN ::GetLastString()
METHOD GetConnectedChainSet() CLASS TSound
::ExecuteCommand( "cs-connected" )
RETURN ECAS_Last_String()
METHOD SetLogHistoryLength( int_length ) CLASS TSound
::ExecuteCommand( "int-set-log-history-length " + AllTrim( Str( int_length ) ) )
METHOD GetLog() CLASS TSound
::ExecuteCommand( "int-log-history" )
RETURN ECAS_Last_String()
METHOD AudioInputList() CLASS TSound
::ExecuteCommand( "ai-list" )
RETURN ECAS_Last_string()
METHOD AudioOutputList() CLASS TSound
::ExecuteCommand( "ao-list" )
RETURN ECAS_Last_string()
METHOD AudioInputLength() CLASS TSound
::ExecuteCommand( "ai-get-length" )
RETURN ::GetLastFloat()
METHOD AudioInputPosition() CLASS TSound
::ExecuteCommand( "ai-getpos" )
RETURN ::GetLastFloat()
METHOD AudioOutputPosition() CLASS TSound
::ExecuteCommand( "ao-getpos" )
RETURN ::GetLastFloat()
