/***************************************************************************
* Copyright (C) 2014 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <QObject>
#include <QSettings>
#include <string.h>
#include <iostream>
#include <unistd.h>
#include <qmmp/buffer.h>
#include <math.h>
#include "outputdirectsound.h"
#define DS_BUFSIZE (48*1024)
OutputDirectSound *OutputDirectSound::instance = 0;
VolumeDirectSound *OutputDirectSound::volumeControl = 0;
OutputDirectSound::OutputDirectSound() : Output()
{
m_ds = 0;
m_primaryBuffer = 0;
m_dsBuffer = 0;
m_dsBufferAt = 0;
instance = this;
}
OutputDirectSound::~OutputDirectSound()
{
instance = 0;
uninitialize();
}
bool OutputDirectSound::initialize(quint32 freq, ChannelMap map, Qmmp::AudioFormat format)
{
Q_UNUSED(format);
DSBUFFERDESC bufferDesc;
HRESULT result = DirectSoundCreate8(0, &m_ds, 0);
if(result != DS_OK)
{
qWarning("OutputDirectSound: DirectSoundCreate8 failed, error code = 0x%lx", result);
m_ds = 0;
return false;
}
if((result = m_ds->SetCooperativeLevel(GetDesktopWindow(), DSSCL_PRIORITY)) != DS_OK)
{
qWarning("OutputDirectSound: SetCooperativeLevel failed, error code = 0x%lx", result);
return false;
}
ZeroMemory(&bufferDesc, sizeof(DSBUFFERDESC));
bufferDesc.dwSize = sizeof(DSBUFFERDESC);
bufferDesc.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_CTRLVOLUME;
bufferDesc.dwBufferBytes = 0;
bufferDesc.lpwfxFormat = NULL;
if((result = m_ds->CreateSoundBuffer(&bufferDesc, &m_primaryBuffer, NULL)) != DS_OK)
{
m_primaryBuffer = 0;
qWarning("OutputDirectSound: CreateSoundBuffer failed, error code = 0x%lx", result);
return false;
}
WAVEFORMATEX wfex;
ZeroMemory(&wfex, sizeof(WAVEFORMATEX));
wfex.wFormatTag = WAVE_FORMAT_PCM;
wfex.nChannels = map.count();
wfex.nSamplesPerSec = freq;
wfex.wBitsPerSample = 16;
wfex.nBlockAlign = (wfex.wBitsPerSample / 8) * wfex.nChannels;
wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
if((result = m_primaryBuffer->SetFormat(&wfex)) != DS_OK)
{
qWarning("OutputDirectSound: SetFormat failed, error code = 0x%lx", result);
return false;
}
if((result = m_primaryBuffer->Play(0, 0, DSBPLAY_LOOPING)) != DS_OK)
{
qWarning("OutputDirectSound: Play failed, error code = 0x%lx", result);
return false;
}
ZeroMemory(&wfex, sizeof(WAVEFORMATEX));
wfex.wFormatTag = WAVE_FORMAT_PCM;
wfex.nChannels = map.count();
wfex.nSamplesPerSec = freq;
wfex.wBitsPerSample = 16;
wfex.nBlockAlign = (wfex.wBitsPerSample / 8) * wfex.nChannels;
wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
ZeroMemory(&bufferDesc, sizeof(DSBUFFERDESC));
bufferDesc.dwSize = sizeof(DSBUFFERDESC);
bufferDesc.dwFlags = DSBCAPS_CTRLFREQUENCY | DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME |
DSBCAPS_GLOBALFOCUS | DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_CTRLPOSITIONNOTIFY;
bufferDesc.lpwfxFormat = &wfex;
bufferDesc.dwBufferBytes = DS_BUFSIZE; // buffer size
IDirectSoundBuffer *pDSB;
if((result = m_ds->CreateSoundBuffer(&bufferDesc, &pDSB, NULL)) != DS_OK)
{
qWarning("OutputDirectSound: CreateSoundBuffer failed, error code = 0x%lx", result);
return false;
}
if((result = pDSB->QueryInterface(IID_IDirectSoundBuffer8, (void**)&m_dsBuffer)) != DS_OK)
{
m_dsBuffer = 0;
qWarning("OutputDirectSound: QueryInterface failed, error code = 0x%lx", result);
pDSB->Release();
return false;
}
m_dsBuffer->SetCurrentPosition(0);
m_dsBuffer->Play(0,0,DSBPLAY_LOOPING);
m_dsBufferAt = 0;
configure(freq, map, Qmmp::PCM_S16LE);
if(volumeControl)
volumeControl->restore();
return true;
}
qint64 OutputDirectSound::latency()
{
return 0;
}
qint64 OutputDirectSound::writeAudio(unsigned char *data, qint64 len)
{
unsigned char *ptr = 0, *ptr2 = 0;
DWORD size = 0, size2 = 0;
DWORD available = bytesToWrite(); //available bytes
if(available < 128)
{
usleep(5000);
return 0;
}
DWORD lockSize = qMin((DWORD)len, available); //required size
HRESULT result = m_dsBuffer->Lock(m_dsBufferAt, lockSize,
(void**)&ptr, (DWORD*)&size,
(void**)&ptr2, (DWORD*)&size2, 0);
if(result == DSERR_BUFFERLOST)
{
m_dsBuffer->Restore();
result = m_dsBuffer->Lock(m_dsBufferAt, lockSize,
(void**)&ptr, (DWORD*)&size,
(void**)&ptr2, (DWORD*)&size2, 0);
}
if(result != DS_OK)
{
qWarning("OutputDirectSound: unable to lock buffer, error = 0x%lx", result);
return -1;
}
DWORD totalSize = size + size2; //total locked size
memmove(ptr, data, size);
if(size2 > 0)
memmove(ptr2, data + size, size2);
m_dsBuffer->Unlock((void*)ptr, size, (void*)ptr2, size2);
m_dsBufferAt += totalSize;
m_dsBufferAt %= DS_BUFSIZE;
return totalSize;
}
void OutputDirectSound::drain()
{
DWORD dsCurrentPlayCursor = 0;
m_dsBuffer->GetCurrentPosition((DWORD*)&dsCurrentPlayCursor, 0);
while(dsCurrentPlayCursor >= m_dsBufferAt)
{
m_dsBuffer->GetCurrentPosition((DWORD*)&dsCurrentPlayCursor, 0);
}
while (dsCurrentPlayCursor <= m_dsBufferAt)
{
m_dsBuffer->GetCurrentPosition((DWORD*)&dsCurrentPlayCursor, 0);
}
}
void OutputDirectSound::suspend()
{
m_dsBuffer->Stop();
}
void OutputDirectSound::resume()
{
HRESULT result = m_dsBuffer->Play(0,0,DSBPLAY_LOOPING);
if(result == DSERR_BUFFERLOST)
{
result = m_dsBuffer->Play(0,0,DSBPLAY_LOOPING);
m_dsBuffer->Restore();
}
}
void OutputDirectSound::reset()
{
m_dsBuffer->SetCurrentPosition(m_dsBufferAt-128);
}
IDirectSoundBuffer8 *OutputDirectSound::secondaryBuffer()
{
return m_dsBuffer;
}
void OutputDirectSound::uninitialize()
{
m_dsBufferAt = 0;
if(m_dsBuffer)
{
m_dsBuffer->Stop();
m_dsBuffer->Release();
m_dsBuffer = 0;
}
if(m_primaryBuffer)
{
m_primaryBuffer->Stop();
m_primaryBuffer->Release();
m_primaryBuffer = 0;
}
if(m_ds)
{
m_ds->Release();
m_ds = 0;
}
}
DWORD OutputDirectSound::bytesToWrite()
{
DWORD dsCurrentPlayCursor = 0;
m_dsBuffer->GetCurrentPosition((DWORD*)&dsCurrentPlayCursor, 0);
long available = dsCurrentPlayCursor - m_dsBufferAt; //available bytes
if(available < 0)
{
available += DS_BUFSIZE;
}
return available;
}
/***** MIXER *****/
VolumeDirectSound::VolumeDirectSound()
{
OutputDirectSound::volumeControl = this;
QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
m_volume.left = settings.value("DirectSound/left_volume", 100).toInt();
m_volume.right = settings.value("DirectSound/right_volume", 100).toInt();
}
VolumeDirectSound::~VolumeDirectSound()
{
m_volume = volume();
QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
settings.setValue("DirectSound/left_volume", m_volume.left);
settings.setValue("DirectSound/right_volume", m_volume.right);
OutputDirectSound::volumeControl = 0;
}
void VolumeDirectSound::setVolume(const VolumeSettings &vol)
{
if(OutputDirectSound::instance && OutputDirectSound::instance->secondaryBuffer())
{
int maxVol = qMax(vol.left, vol.right);
double voldB = -100.0, pandB = 0;
if(maxVol)
{
voldB = 20.0*log(maxVol/100.0)/log(10);
int balance = (vol.right - vol.left)*100.0/maxVol;
pandB = balance ? 20.0*log((100.0 - fabs(balance))/100.0)/log(10) : 0;
if(balance > 0)
pandB = -pandB;
}
OutputDirectSound::instance->secondaryBuffer()->SetVolume(voldB*100);
OutputDirectSound::instance->secondaryBuffer()->SetPan(pandB*100);
}
m_volume = vol;
}
VolumeSettings VolumeDirectSound::volume() const
{
VolumeSettings vol;
if(OutputDirectSound::instance && OutputDirectSound::instance->secondaryBuffer())
{
long v = 0;
double voldB = 0, pandB = 0;
OutputDirectSound::instance->secondaryBuffer()->GetVolume(&v);
voldB = v / 100.0;
OutputDirectSound::instance->secondaryBuffer()->GetPan(&v);
pandB = v / 100.0;
int volume = 100*pow(10, voldB/20.0);
int balance = 100 - 100*pow(10, abs(pandB)/20.0);
if(pandB > 0)
balance = -balance;
vol.left = volume-qMax(balance,0)*volume/100.0;
vol.right = volume+qMin(balance,0)*volume/100.0;
return vol;
}
return m_volume;
}
void VolumeDirectSound::restore()
{
setVolume(m_volume);
}
