--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/multimedia/audio/qaudiooutput_win32_p.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,555 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtMultimedia module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists for the convenience
+// of other Qt classes. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qaudiooutput_win32_p.h"
+
+//#define DEBUG_AUDIO 1
+
+QT_BEGIN_NAMESPACE
+
+static CRITICAL_SECTION waveOutCriticalSection;
+
+static const int minimumIntervalTime = 50;
+
+QAudioOutputPrivate::QAudioOutputPrivate(const QByteArray &device, const QAudioFormat& audioFormat):
+ settings(audioFormat)
+{
+ bytesAvailable = 0;
+ buffer_size = 0;
+ period_size = 0;
+ m_device = device;
+ totalTimeValue = 0;
+ intervalTime = 1000;
+ audioBuffer = 0;
+ errorState = QAudio::NoError;
+ deviceState = QAudio::StopState;
+ audioSource = 0;
+ pullMode = true;
+ finished = false;
+ InitializeCriticalSection(&waveOutCriticalSection);
+}
+
+QAudioOutputPrivate::~QAudioOutputPrivate()
+{
+ EnterCriticalSection(&waveOutCriticalSection);
+ finished = true;
+ LeaveCriticalSection(&waveOutCriticalSection);
+
+ close();
+ DeleteCriticalSection(&waveOutCriticalSection);
+}
+
+void CALLBACK QAudioOutputPrivate::waveOutProc( HWAVEOUT hWaveOut, UINT uMsg,
+ DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 )
+{
+ Q_UNUSED(dwParam1)
+ Q_UNUSED(dwParam2)
+ Q_UNUSED(hWaveOut)
+
+ QAudioOutputPrivate* qAudio;
+ qAudio = (QAudioOutputPrivate*)(dwInstance);
+ if(!qAudio)
+ return;
+
+ switch(uMsg) {
+ case WOM_OPEN:
+ qAudio->feedback();
+ break;
+ case WOM_CLOSE:
+ return;
+ case WOM_DONE:
+ EnterCriticalSection(&waveOutCriticalSection);
+ if(qAudio->finished || qAudio->buffer_size == 0 || qAudio->period_size == 0) {
+ LeaveCriticalSection(&waveOutCriticalSection);
+ return;
+ }
+ qAudio->waveFreeBlockCount++;
+ if(qAudio->waveFreeBlockCount >= qAudio->buffer_size/qAudio->period_size)
+ qAudio->waveFreeBlockCount = qAudio->buffer_size/qAudio->period_size;
+ qAudio->feedback();
+ LeaveCriticalSection(&waveOutCriticalSection);
+ break;
+ default:
+ return;
+ }
+}
+
+WAVEHDR* QAudioOutputPrivate::allocateBlocks(int size, int count)
+{
+ int i;
+ unsigned char* buffer;
+ WAVEHDR* blocks;
+ DWORD totalBufferSize = (size + sizeof(WAVEHDR))*count;
+
+ if((buffer=(unsigned char*)HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,
+ totalBufferSize)) == 0) {
+ qWarning("QAudioOutput: Memory allocation error");
+ return 0;
+ }
+ blocks = (WAVEHDR*)buffer;
+ buffer += sizeof(WAVEHDR)*count;
+ for(i = 0; i < count; i++) {
+ blocks[i].dwBufferLength = size;
+ blocks[i].lpData = (LPSTR)buffer;
+ buffer += size;
+ }
+ return blocks;
+}
+
+void QAudioOutputPrivate::freeBlocks(WAVEHDR* blockArray)
+{
+ HeapFree(GetProcessHeap(), 0, blockArray);
+}
+
+QAudioFormat QAudioOutputPrivate::format() const
+{
+ return settings;
+}
+
+QIODevice* QAudioOutputPrivate::start(QIODevice* device)
+{
+ if(deviceState != QAudio::StopState)
+ close();
+
+ if(!pullMode && audioSource) {
+ delete audioSource;
+ }
+
+ if(device) {
+ //set to pull mode
+ pullMode = true;
+ audioSource = device;
+ deviceState = QAudio::ActiveState;
+ } else {
+ //set to push mode
+ pullMode = false;
+ audioSource = new OutputPrivate(this);
+ audioSource->open(QIODevice::WriteOnly|QIODevice::Unbuffered);
+ deviceState = QAudio::IdleState;
+ }
+
+ if( !open() )
+ return 0;
+
+ emit stateChanged(deviceState);
+
+ return audioSource;
+}
+
+void QAudioOutputPrivate::stop()
+{
+ if(deviceState == QAudio::StopState)
+ return;
+ close();
+ if(!pullMode && audioSource) {
+ delete audioSource;
+ audioSource = 0;
+ }
+ emit stateChanged(deviceState);
+}
+
+bool QAudioOutputPrivate::open()
+{
+#ifdef DEBUG_AUDIO
+ QTime now(QTime::currentTime());
+ qDebug()<<now.second()<<"s "<<now.msec()<<"ms :open()";
+#endif
+ if(buffer_size == 0) {
+ // Default buffer size, 200ms, default period size is 40ms
+ buffer_size = settings.frequency()*settings.channels()*(settings.sampleSize()/8)*0.2;
+ period_size = buffer_size/5;
+ } else {
+ period_size = buffer_size/5;
+ }
+ waveBlocks = allocateBlocks(period_size, buffer_size/period_size);
+
+ EnterCriticalSection(&waveOutCriticalSection);
+ waveFreeBlockCount = buffer_size/period_size;
+ LeaveCriticalSection(&waveOutCriticalSection);
+
+ waveCurrentBlock = 0;
+
+ if(audioBuffer == 0)
+ audioBuffer = new char[buffer_size];
+
+ timeStamp.restart();
+ elapsedTimeOffset = 0;
+
+ wfx.nSamplesPerSec = settings.frequency();
+ wfx.wBitsPerSample = settings.sampleSize();
+ wfx.nChannels = settings.channels();
+ wfx.cbSize = 0;
+
+ wfx.wFormatTag = WAVE_FORMAT_PCM;
+ wfx.nBlockAlign = (wfx.wBitsPerSample >> 3) * wfx.nChannels;
+ wfx.nAvgBytesPerSec = wfx.nBlockAlign * wfx.nSamplesPerSec;
+
+ UINT_PTR devId = WAVE_MAPPER;
+
+ WAVEOUTCAPS woc;
+ unsigned long iNumDevs,ii;
+ iNumDevs = waveOutGetNumDevs();
+ for(ii=0;ii<iNumDevs;ii++) {
+ if(waveOutGetDevCaps(ii, &woc, sizeof(WAVEOUTCAPS))
+ == MMSYSERR_NOERROR) {
+ QString tmp;
+ tmp = QString::fromUtf16((const unsigned short*)woc.szPname);
+ if(tmp.compare(QLatin1String(m_device)) == 0) {
+ devId = ii;
+ break;
+ }
+ }
+ }
+
+ if(waveOutOpen(&hWaveOut, devId, &wfx,
+ (DWORD_PTR)&waveOutProc,
+ (DWORD_PTR) this,
+ CALLBACK_FUNCTION) != MMSYSERR_NOERROR) {
+ errorState = QAudio::OpenError;
+ deviceState = QAudio::StopState;
+ emit stateChanged(deviceState);
+ qWarning("QAudioOutput: open error");
+ return false;
+ }
+
+ totalTimeValue = 0;
+ timeStampOpened.restart();
+ elapsedTimeOffset = 0;
+
+ errorState = QAudio::NoError;
+ if(pullMode) {
+ deviceState = QAudio::ActiveState;
+ QTimer::singleShot(10, this, SLOT(feedback()));
+ } else
+ deviceState = QAudio::IdleState;
+
+ return true;
+}
+
+void QAudioOutputPrivate::close()
+{
+ if(deviceState == QAudio::StopState)
+ return;
+
+ deviceState = QAudio::StopState;
+ int delay = (buffer_size-bytesFree())*1000/(settings.frequency()
+ *settings.channels()*(settings.sampleSize()/8));
+ waveOutReset(hWaveOut);
+ Sleep(delay+10);
+
+ freeBlocks(waveBlocks);
+ waveOutClose(hWaveOut);
+ delete [] audioBuffer;
+ audioBuffer = 0;
+ buffer_size = 0;
+}
+
+int QAudioOutputPrivate::bytesFree() const
+{
+ int buf;
+ buf = waveFreeBlockCount*period_size;
+
+ return buf;
+}
+
+int QAudioOutputPrivate::periodSize() const
+{
+ return period_size;
+}
+
+void QAudioOutputPrivate::setBufferSize(int value)
+{
+ if(deviceState == QAudio::StopState)
+ buffer_size = value;
+}
+
+int QAudioOutputPrivate::bufferSize() const
+{
+ return buffer_size;
+}
+
+void QAudioOutputPrivate::setNotifyInterval(int ms)
+{
+ if(ms >= minimumIntervalTime)
+ intervalTime = ms;
+ else
+ intervalTime = minimumIntervalTime;
+}
+
+int QAudioOutputPrivate::notifyInterval() const
+{
+ return intervalTime;
+}
+
+qint64 QAudioOutputPrivate::totalTime() const
+{
+ return totalTimeValue;
+}
+
+qint64 QAudioOutputPrivate::write( const char *data, qint64 len )
+{
+ // Write out some audio data
+
+ char* p = (char*)data;
+ int l = (int)len;
+
+ WAVEHDR* current;
+ int remain;
+ current = &waveBlocks[waveCurrentBlock];
+ while(l > 0) {
+ EnterCriticalSection(&waveOutCriticalSection);
+ if(waveFreeBlockCount==0) {
+ LeaveCriticalSection(&waveOutCriticalSection);
+ break;
+ }
+ LeaveCriticalSection(&waveOutCriticalSection);
+
+ if(current->dwFlags & WHDR_PREPARED)
+ waveOutUnprepareHeader(hWaveOut, current, sizeof(WAVEHDR));
+
+ if(l < period_size)
+ remain = l;
+ else
+ remain = period_size;
+ memcpy(current->lpData, p, remain);
+
+ l -= remain;
+ p += remain;
+ current->dwBufferLength = remain;
+ waveOutPrepareHeader(hWaveOut, current, sizeof(WAVEHDR));
+ waveOutWrite(hWaveOut, current, sizeof(WAVEHDR));
+
+ EnterCriticalSection(&waveOutCriticalSection);
+ waveFreeBlockCount--;
+ LeaveCriticalSection(&waveOutCriticalSection);
+#ifdef DEBUG_AUDIO
+ EnterCriticalSection(&waveOutCriticalSection);
+ qDebug("write out l=%d, waveFreeBlockCount=%d",
+ current->dwBufferLength,waveFreeBlockCount);
+ LeaveCriticalSection(&waveOutCriticalSection);
+#endif
+ totalTimeValue += current->dwBufferLength
+ /(settings.channels()*(settings.sampleSize()/8))
+ *1000000/settings.frequency();;
+ waveCurrentBlock++;
+ waveCurrentBlock %= buffer_size/period_size;
+ current = &waveBlocks[waveCurrentBlock];
+ current->dwUser = 0;
+ }
+ return (len-l);
+}
+
+void QAudioOutputPrivate::resume()
+{
+ if(deviceState == QAudio::SuspendState) {
+ deviceState = QAudio::ActiveState;
+ errorState = QAudio::NoError;
+ waveOutRestart(hWaveOut);
+ QTimer::singleShot(10, this, SLOT(feedback()));
+ emit stateChanged(deviceState);
+ }
+}
+
+void QAudioOutputPrivate::suspend()
+{
+ if(deviceState == QAudio::ActiveState) {
+ waveOutPause(hWaveOut);
+ deviceState = QAudio::SuspendState;
+ errorState = QAudio::NoError;
+ emit stateChanged(deviceState);
+ }
+}
+
+void QAudioOutputPrivate::feedback()
+{
+#ifdef DEBUG_AUDIO
+ QTime now(QTime::currentTime());
+ qDebug()<<now.second()<<"s "<<now.msec()<<"ms :feedback()";
+#endif
+ bytesAvailable = bytesFree();
+
+ if(!(deviceState==QAudio::StopState||deviceState==QAudio::SuspendState)) {
+ if(bytesAvailable >= period_size)
+ QMetaObject::invokeMethod(this, "deviceReady", Qt::QueuedConnection);
+ }
+}
+
+bool QAudioOutputPrivate::deviceReady()
+{
+ if(pullMode) {
+ int chunks = bytesAvailable/period_size;
+#ifdef DEBUG_AUDIO
+ qDebug()<<"deviceReady() avail="<<bytesAvailable<<" bytes, period size="<<period_size<<" bytes";
+ qDebug()<<"deviceReady() no. of chunks that can fit ="<<chunks<<", chunks in bytes ="<<chunks*period_size;
+#endif
+ bool startup = false;
+ if(totalTimeValue == 0)
+ startup = true;
+
+ bool full=false;
+ EnterCriticalSection(&waveOutCriticalSection);
+ if(waveFreeBlockCount==0) full = true;
+ LeaveCriticalSection(&waveOutCriticalSection);
+ if (full){
+#ifdef DEBUG_AUDIO
+ qDebug() << "Skipping data as unable to write";
+#endif
+ if((timeStamp.elapsed() + elapsedTimeOffset) > intervalTime ) {
+ emit notify();
+ elapsedTimeOffset = timeStamp.elapsed() + elapsedTimeOffset - intervalTime;
+ timeStamp.restart();
+ }
+ return true;
+ }
+
+ if(startup)
+ waveOutPause(hWaveOut);
+ int input = period_size*chunks;
+ int l = audioSource->read(audioBuffer,input);
+ if(l > 0) {
+ int out= write(audioBuffer,l);
+ if(out > 0)
+ deviceState = QAudio::ActiveState;
+ if(startup)
+ waveOutRestart(hWaveOut);
+ } else if(l == 0) {
+ bytesAvailable = bytesFree();
+
+ int check = 0;
+ EnterCriticalSection(&waveOutCriticalSection);
+ check = waveFreeBlockCount;
+ LeaveCriticalSection(&waveOutCriticalSection);
+ if(check == buffer_size/period_size) {
+ errorState = QAudio::UnderrunError;
+ deviceState = QAudio::IdleState;
+ emit stateChanged(deviceState);
+ }
+
+ } else if(l < 0) {
+ bytesAvailable = bytesFree();
+ errorState = QAudio::IOError;
+ }
+ }
+ if(deviceState != QAudio::ActiveState)
+ return true;
+
+ if((timeStamp.elapsed() + elapsedTimeOffset) > intervalTime) {
+ emit notify();
+ elapsedTimeOffset = timeStamp.elapsed() + elapsedTimeOffset - intervalTime;
+ timeStamp.restart();
+ }
+
+ return true;
+}
+
+qint64 QAudioOutputPrivate::clock() const
+{
+ if (deviceState == QAudio::StopState)
+ return 0;
+
+ return timeStampOpened.elapsed()*1000;
+}
+
+QAudio::Error QAudioOutputPrivate::error() const
+{
+ return errorState;
+}
+
+QAudio::State QAudioOutputPrivate::state() const
+{
+ return deviceState;
+}
+
+void QAudioOutputPrivate::reset()
+{
+ close();
+}
+
+OutputPrivate::OutputPrivate(QAudioOutputPrivate* audio)
+{
+ audioDevice = qobject_cast<QAudioOutputPrivate*>(audio);
+}
+
+OutputPrivate::~OutputPrivate() {}
+
+qint64 OutputPrivate::readData( char* data, qint64 len)
+{
+ Q_UNUSED(data)
+ Q_UNUSED(len)
+
+ return 0;
+}
+
+qint64 OutputPrivate::writeData(const char* data, qint64 len)
+{
+ int retry = 0;
+ qint64 written = 0;
+
+ if((audioDevice->deviceState == QAudio::ActiveState)
+ ||(audioDevice->deviceState == QAudio::IdleState)) {
+ qint64 l = len;
+ while(written < l) {
+ int chunk = audioDevice->write(data+written,(l-written));
+ if(chunk <= 0)
+ retry++;
+ else
+ written+=chunk;
+
+ if(retry > 10)
+ return written;
+ }
+ audioDevice->deviceState = QAudio::ActiveState;
+ }
+ return written;
+}
+
+QT_END_NAMESPACE