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/***************************************************************************
* Copyright (C) 2009 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <QObject>
#include <QApplication>
#include <QtGlobal>
#include <stdio.h>
#include <string.h>
#include <iostream>
#include <qmmp/buffer.h>
#include <qmmp/visual.h>
#include "outputwaveout.h"
#define MAX_WAVEBLOCKS 32
static CRITICAL_SECTION cs;
static HWAVEOUT dev = NULL;
static int ScheduledBlocks = 0;
static int PlayedWaveHeadersCount = 0; // free index
static WAVEHDR* PlayedWaveHeaders [MAX_WAVEBLOCKS];
static void CALLBACK wave_callback (HWAVE hWave, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 )
{
if ( uMsg == WOM_DONE )
{
EnterCriticalSection (&cs);
PlayedWaveHeaders [PlayedWaveHeadersCount++] = (WAVEHDR*) dwParam1;
LeaveCriticalSection (&cs);
}
}
static void
free_memory ( void )
{
WAVEHDR* wh;
HGLOBAL hg;
EnterCriticalSection ( &cs );
wh = PlayedWaveHeaders [--PlayedWaveHeadersCount];
ScheduledBlocks--; // decrease the number of USED blocks
LeaveCriticalSection ( &cs );
waveOutUnprepareHeader ( dev, wh, sizeof (WAVEHDR) );
hg = GlobalHandle ( wh -> lpData ); // Deallocate the buffer memory
GlobalUnlock (hg);
GlobalFree (hg);
hg = GlobalHandle ( wh ); // Deallocate the header memory
GlobalUnlock (hg);
GlobalFree (hg);
}
static int
Box ( const char* msg )
{
//MessageBox ( NULL, ms"Error Message . . .", MB_OK | MB_ICONEXCLAMATION );
return -1;
}
OutputWaveOut::OutputWaveOut(QObject * parent)
: Output(parent)
{
//m_connection = 0;
//m_dev = 0;
}
OutputWaveOut::~OutputWaveOut()
{
uninitialize();
}
void OutputWaveOut::configure(quint32 freq, int chan, Qmmp::AudioFormat format)
{
WAVEFORMATEX fmt;
UINT deviceID = WAVE_MAPPER;
fmt.wFormatTag = WAVE_FORMAT_PCM;
fmt.wBitsPerSample = 16;
fmt.nChannels = chan;
fmt.nSamplesPerSec = (unsigned long)(freq);
fmt.nBlockAlign = fmt.nChannels * fmt.wBitsPerSample/8;
fmt.nAvgBytesPerSec = fmt.nSamplesPerSec * fmt.nChannels * fmt.wBitsPerSample/8;
switch (waveOutOpen (&dev, deviceID, &fmt, (DWORD)wave_callback, 0, CALLBACK_FUNCTION))
{
case MMSYSERR_ALLOCATED:
return qWarning("OutputWaveOut: Device is already open.");
case MMSYSERR_BADDEVICEID:
return qWarning("OutputWaveOut: The specified device is out of range.");
case MMSYSERR_NODRIVER:
return qWarning("OutputWaveOut: There is no audio driver in this system.");
case MMSYSERR_NOMEM:
return qWarning("OutputWaveOut: Unable to allocate sound memory.");
case WAVERR_BADFORMAT:
return qWarning("OutputWaveOut: This audio format is not supported.");
case WAVERR_SYNC:
return qWarning("OutputWaveOut: The device is synchronous.");
default:
return qWarning("OutputWaveOut: Unknown media error.");
case MMSYSERR_NOERROR:
break;
}
waveOutReset (dev);
InitializeCriticalSection ( &cs );
Output::configure(freq, chan, format);
return;
}
bool OutputWaveOut::initialize()
{
if (!waveOutGetNumDevs ())
{
qWarning("OutputWaveOut: no audio device found");
return FALSE;
}
return true;
}
qint64 OutputWaveOut::latency()
{
return 0;
}
qint64 OutputWaveOut::writeAudio(unsigned char *data, qint64 len)
{
HGLOBAL hg;
HGLOBAL hg2;
LPWAVEHDR wh;
void* allocptr;
len = qMin(len, (qint64)1024);
do
{
while ( PlayedWaveHeadersCount > 0 ) // free used blocks ...
free_memory ();
if ( ScheduledBlocks < sizeof(PlayedWaveHeaders)/sizeof(*PlayedWaveHeaders) ) // wait for a free block ...
break;
usleep (500);
}
while (1);
if ( (hg2 = GlobalAlloc ( GMEM_MOVEABLE, len )) == NULL ) // allocate some memory for a copy of the buffer
return Box ( "GlobalAlloc failed." );
allocptr = GlobalLock (hg2);
CopyMemory ( allocptr, data, len ); // Here we can call any modification output functions we want....
if ( (hg = GlobalAlloc (GMEM_MOVEABLE | GMEM_ZEROINIT, sizeof (WAVEHDR))) == NULL ) // now make a header and WRITE IT!
return -1;
wh = (wavehdr_tag*)GlobalLock (hg);
wh->dwBufferLength = len;
wh->lpData = (CHAR *)allocptr;
if ( waveOutPrepareHeader ( dev, wh, sizeof (WAVEHDR)) != MMSYSERR_NOERROR )
{
GlobalUnlock (hg);
GlobalFree (hg);
return -1;
}
if ( waveOutWrite ( dev, wh, sizeof (WAVEHDR)) != MMSYSERR_NOERROR )
{
GlobalUnlock (hg);
GlobalFree (hg);
return -1;
}
EnterCriticalSection ( &cs );
ScheduledBlocks++;
LeaveCriticalSection ( &cs );
return len;
}
void OutputWaveOut::flush()
{
}
void OutputWaveOut::uninitialize()
{
if (dev)
{
while ( ScheduledBlocks > 0 )
{
Sleep (ScheduledBlocks);
while ( PlayedWaveHeadersCount > 0 ) // free used blocks ...
free_memory ();
}
waveOutReset (dev); // reset the device
waveOutClose (dev); // close the device
dev = 0;
}
DeleteCriticalSection ( &cs );
ScheduledBlocks = 0;
return;
}
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