293 lines
9.6 KiB
C++
Executable file
293 lines
9.6 KiB
C++
Executable file
/******************************************************************************\
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* Copyright (c) 2004-2019
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*
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* Author(s):
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* Volker Fischer
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*
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******************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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\******************************************************************************/
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#include "soundbase.h"
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/* Implementation *************************************************************/
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CSoundBase::CSoundBase ( const QString& strNewSystemDriverTechniqueName,
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const bool bNewIsCallbackAudioInterface,
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void (*fpNewProcessCallback) ( CVector<int16_t>& psData, void* pParg ),
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void* pParg,
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const int iNewCtrlMIDIChannel ) :
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fpProcessCallback ( fpNewProcessCallback ),
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pProcessCallbackArg ( pParg ), bRun ( false ),
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bIsCallbackAudioInterface ( bNewIsCallbackAudioInterface ),
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strSystemDriverTechniqueName ( strNewSystemDriverTechniqueName ),
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iCtrlMIDIChannel ( iNewCtrlMIDIChannel )
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{
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// initializations for the sound card names (default)
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lNumDevs = 1;
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strDriverNames[0] = strSystemDriverTechniqueName;
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// set current device
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lCurDev = 0; // default device
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}
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int CSoundBase::Init ( const int iNewPrefMonoBufferSize )
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{
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// init audio sound card buffer
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if ( !bIsCallbackAudioInterface )
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{
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vecsAudioSndCrdStereo.Init ( 2 * iNewPrefMonoBufferSize /* stereo */ );
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}
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return iNewPrefMonoBufferSize;
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}
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void CSoundBase::Start()
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{
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bRun = true;
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// TODO start audio interface
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// start the audio thread in case we do not have an callback
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// based audio interface
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if ( !bIsCallbackAudioInterface )
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{
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start();
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}
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}
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void CSoundBase::Stop()
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{
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// set flag so that thread can leave the main loop
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bRun = false;
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// give thread some time to terminate
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if ( !bIsCallbackAudioInterface )
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{
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wait ( 5000 );
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}
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}
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void CSoundBase::run()
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{
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// main loop of working thread
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while ( bRun )
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{
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// get audio from sound card (blocking function)
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Read ( vecsAudioSndCrdStereo );
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// process audio data
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(*fpProcessCallback) ( vecsAudioSndCrdStereo, pProcessCallbackArg );
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// play the new block
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Write ( vecsAudioSndCrdStereo );
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}
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}
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void CSoundBase::ParseMIDIMessage ( const CVector<uint8_t>& vMIDIPaketBytes )
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{
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if ( vMIDIPaketBytes.Size() > 0 )
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{
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const uint8_t iStatusByte = vMIDIPaketBytes[0];
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// check if status byte is correct
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if ( ( iStatusByte >= 0x80 ) && ( iStatusByte < 0xF0 ) )
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{
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// zero-based MIDI channel number (i.e. range 0-15)
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const int iMIDIChannelZB = iStatusByte & 0x0F;
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/*
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// debugging
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printf ( "%02X: ", iMIDIChannelZB );
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for ( int i = 0; i < vMIDIPaketBytes.Size(); i++ )
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{
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printf ( "%02X ", vMIDIPaketBytes[i] );
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}
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printf ( "\n" );
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*/
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// per definition if MIDI channel is 0, we listen to all channels
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// note that iCtrlMIDIChannel is one-based channel number
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if ( ( iCtrlMIDIChannel == 0 ) || ( iCtrlMIDIChannel - 1 == iMIDIChannelZB ) )
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{
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// we only want to parse controller messages
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if ( ( iStatusByte >= 0xB0 ) && ( iStatusByte < 0xC0 ) )
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{
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// make sure paket is long enough
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if ( vMIDIPaketBytes.Size() > 2 )
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{
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// we are assuming that the controller number is the same
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// as the audio fader index and the range is 0-127
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const int iFaderLevel = static_cast<int> ( static_cast<double> (
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qMin ( vMIDIPaketBytes[2], uint8_t ( 127 ) ) ) / 127 * AUD_MIX_FADER_MAX );
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// Behringer X-TOUCH: offset of 0x46
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const int iChID = vMIDIPaketBytes[1] - 70;
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EmitControllerInFaderLevel ( iChID, iFaderLevel );
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}
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}
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}
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}
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}
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}
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/******************************************************************************\
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* Device handling *
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\******************************************************************************/
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QString CSoundBase::SetDev ( const int iNewDev )
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{
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// init return parameter with "no error"
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QString strReturn = "";
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// first check if valid input parameter
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if ( iNewDev >= lNumDevs )
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{
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// we should actually never get here...
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return tr ( "Invalid device selection." );
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}
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// check if an ASIO driver was already initialized
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if ( lCurDev != INVALID_SNC_CARD_DEVICE )
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{
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// a device was already been initialized and is used, first clean up
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// driver
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UnloadCurrentDriver();
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const QString strErrorMessage = LoadAndInitializeDriver ( iNewDev );
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if ( !strErrorMessage.isEmpty() )
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{
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if ( iNewDev != lCurDev )
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{
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// loading and initializing the new driver failed, go back to
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// original driver and display error message
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LoadAndInitializeDriver ( lCurDev );
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}
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else
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{
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// the same driver is used but the driver properties seems to
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// have changed so that they are not compatible to our
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// software anymore
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QMessageBox::critical (
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nullptr, APP_NAME, QString ( tr ( "The audio driver properties "
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"have changed to a state which is incompatible to this "
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"software. The selected audio device could not be used "
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"because of the following error: <b>" ) ) +
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strErrorMessage +
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QString ( tr ( "</b><br><br>Please restart the software." ) ),
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"Close", nullptr );
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_exit ( 0 );
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}
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// store error return message
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strReturn = strErrorMessage;
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}
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}
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else
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{
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// init flag for "load any driver"
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bool bTryLoadAnyDriver = false;
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if ( iNewDev != INVALID_SNC_CARD_DEVICE )
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{
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// This is the first time a driver is to be initialized, we first
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// try to load the selected driver, if this fails, we try to load
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// the first available driver in the system. If this fails, too, we
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// throw an error that no driver is available -> it does not make
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// sense to start the software if no audio hardware is available.
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if ( !LoadAndInitializeDriver ( iNewDev ).isEmpty() )
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{
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// loading and initializing the new driver failed, try to find
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// at least one usable driver
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bTryLoadAnyDriver = true;
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}
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}
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else
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{
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// try to find one usable driver (select the first valid driver)
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bTryLoadAnyDriver = true;
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}
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if ( bTryLoadAnyDriver )
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{
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// try to load and initialize any valid driver
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QVector<QString> vsErrorList =
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LoadAndInitializeFirstValidDriver();
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if ( !vsErrorList.isEmpty() )
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{
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// create error message with all details
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QString sErrorMessage = tr ( "<b>No usable " ) +
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strSystemDriverTechniqueName + tr ( " audio device "
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"(driver) found.</b><br><br>"
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"In the following there is a list of all available drivers "
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"with the associated error message:<ul>" );
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for ( int i = 0; i < lNumDevs; i++ )
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{
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sErrorMessage += "<li><b>" + GetDeviceName ( i ) + "</b>: " +
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vsErrorList[i] + "</li>";
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}
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sErrorMessage += "</ul>";
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throw CGenErr ( sErrorMessage );
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}
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}
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}
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return strReturn;
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}
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QVector<QString> CSoundBase::LoadAndInitializeFirstValidDriver()
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{
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QVector<QString> vsErrorList;
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// load and initialize first valid ASIO driver
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bool bValidDriverDetected = false;
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int iCurDriverIdx = 0;
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// try all available drivers in the system ("lNumDevs" devices)
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while ( !bValidDriverDetected && ( iCurDriverIdx < lNumDevs ) )
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{
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// try to load and initialize current driver, store error message
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const QString strCurError =
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LoadAndInitializeDriver ( iCurDriverIdx );
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vsErrorList.append ( strCurError );
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if ( strCurError.isEmpty() )
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{
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// initialization was successful
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bValidDriverDetected = true;
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// store ID of selected driver
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lCurDev = iCurDriverIdx;
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// empty error list shows that init was successful
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vsErrorList.clear();
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}
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// try next driver
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iCurDriverIdx++;
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}
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return vsErrorList;
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}
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