path: root/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp

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** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
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//
//  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.
//
// INTERNAL USE ONLY: Do NOT use for any other purpose.
//


#include <windows.h>
#include <mmsystem.h>
#include "qaudiodeviceinfo_win32_p.h"
#include <dshow.h>

#if defined(Q_CC_MINGW)

extern GUID CLSID_AudioInputDeviceCategory;

#ifndef __IErrorLog_INTERFACE_DEFINED__
#define __IErrorLog_INTERFACE_DEFINED__

DECLARE_INTERFACE_(IErrorLog, IUnknown)
{
    STDMETHOD(AddError)(THIS_ LPCOLESTR, EXCEPINFO *) PURE;
};

#endif /* __IErrorLog_INTERFACE_DEFINED__ */

#ifndef __IPropertyBag_INTERFACE_DEFINED__
#define __IPropertyBag_INTERFACE_DEFINED__

const GUID IID_IPropertyBag = {0x55272A00, 0x42CB, 0x11CE, {0x81, 0x35, 0x00, 0xAA, 0x00, 0x4B, 0xB8, 0x51}};

DECLARE_INTERFACE_(IPropertyBag, IUnknown)
{
    STDMETHOD(Read)(THIS_ LPCOLESTR, VARIANT *, IErrorLog *) PURE;
    STDMETHOD(Write)(THIS_ LPCOLESTR, VARIANT *) PURE;
};

#endif /* __IPropertyBag_INTERFACE_DEFINED__ */

#endif//Q_CC_MINGW

QT_BEGIN_NAMESPACE

// For mingw toolchain mmsystem.h only defines half the defines, so add if needed.
#ifndef WAVE_FORMAT_44M08
#define WAVE_FORMAT_44M08 0x00000100
#define WAVE_FORMAT_44S08 0x00000200
#define WAVE_FORMAT_44M16 0x00000400
#define WAVE_FORMAT_44S16 0x00000800
#define WAVE_FORMAT_48M08 0x00001000
#define WAVE_FORMAT_48S08 0x00002000
#define WAVE_FORMAT_48M16 0x00004000
#define WAVE_FORMAT_48S16 0x00008000
#define WAVE_FORMAT_96M08 0x00010000
#define WAVE_FORMAT_96S08 0x00020000
#define WAVE_FORMAT_96M16 0x00040000
#define WAVE_FORMAT_96S16 0x00080000
#endif


QAudioDeviceInfoInternal::QAudioDeviceInfoInternal(QByteArray dev, QAudio::Mode mode)
{
    QDataStream ds(&dev, QIODevice::ReadOnly);
    ds >> devId >> device;
    this->mode = mode;

    updateLists();
}

QAudioDeviceInfoInternal::~QAudioDeviceInfoInternal()
{
    close();
}

bool QAudioDeviceInfoInternal::isFormatSupported(const QAudioFormat& format) const
{
    return testSettings(format);
}

QAudioFormat QAudioDeviceInfoInternal::preferredFormat() const
{
    QAudioFormat nearest;
    if(mode == QAudio::AudioOutput) {
        nearest.setFrequency(44100);
        nearest.setChannelCount(2);
        nearest.setByteOrder(QAudioFormat::LittleEndian);
        nearest.setSampleType(QAudioFormat::SignedInt);
        nearest.setSampleSize(16);
        nearest.setCodec(QLatin1String("audio/pcm"));
    } else {
        nearest.setFrequency(11025);
        nearest.setChannelCount(1);
        nearest.setByteOrder(QAudioFormat::LittleEndian);
        nearest.setSampleType(QAudioFormat::SignedInt);
        nearest.setSampleSize(8);
        nearest.setCodec(QLatin1String("audio/pcm"));
    }
    return nearest;
}

QString QAudioDeviceInfoInternal::deviceName() const
{
    return device;
}

QStringList QAudioDeviceInfoInternal::supportedCodecs()
{
    updateLists();
    return codecz;
}

QList<int> QAudioDeviceInfoInternal::supportedSampleRates()
{
    updateLists();
    return freqz;
}

QList<int> QAudioDeviceInfoInternal::supportedChannelCounts()
{
    updateLists();
    return channelz;
}

QList<int> QAudioDeviceInfoInternal::supportedSampleSizes()
{
    updateLists();
    return sizez;
}

QList<QAudioFormat::Endian> QAudioDeviceInfoInternal::supportedByteOrders()
{
    updateLists();
    return byteOrderz;
}

QList<QAudioFormat::SampleType> QAudioDeviceInfoInternal::supportedSampleTypes()
{
    updateLists();
    return typez;
}


bool QAudioDeviceInfoInternal::open()
{
    return true;
}

void QAudioDeviceInfoInternal::close()
{
}

bool QAudioDeviceInfoInternal::testSettings(const QAudioFormat& format) const
{
    // Set nearest to closest settings that do work.
    // See if what is in settings will work (return value).

    bool failed = false;
    bool match = false;

    // check codec
    for( int i = 0; i < codecz.count(); i++) {
        if (format.codec() == codecz.at(i))
            match = true;
    }
    if (!match) failed = true;

    // check channel
    match = false;
    if (!failed) {
        for( int i = 0; i < channelz.count(); i++) {
            if (format.channels() == channelz.at(i)) {
                match = true;
                break;
            }
        }
        if (!match)
            failed = true;
    }

    // check frequency
    match = false;
    if (!failed) {
        for( int i = 0; i < freqz.count(); i++) {
            if (format.frequency() == freqz.at(i)) {
                match = true;
                break;
            }
        }
        if (!match)
            failed = true;
    }

    // check sample size
    match = false;
    if (!failed) {
        for( int i = 0; i < sizez.count(); i++) {
            if (format.sampleSize() == sizez.at(i)) {
                match = true;
                break;
            }
        }
        if (!match)
            failed = true;
    }

    // check byte order
    match = false;
    if (!failed) {
        for( int i = 0; i < byteOrderz.count(); i++) {
            if (format.byteOrder() == byteOrderz.at(i)) {
                match = true;
                break;
            }
        }
        if (!match)
            failed = true;
    }

    // check sample type
    match = false;
    if (!failed) {
        for( int i = 0; i < typez.count(); i++) {
            if (format.sampleType() == typez.at(i)) {
                match = true;
                break;
            }
        }
        if (!match)
            failed = true;
    }

    if(!failed) {
        // settings work
        return true;
    }
    return false;
}

void QAudioDeviceInfoInternal::updateLists()
{
    // redo all lists based on current settings
    bool match = false;
    DWORD fmt = NULL;

    if(mode == QAudio::AudioOutput) {
        WAVEOUTCAPS woc;
        if (waveOutGetDevCaps(devId, &woc, sizeof(WAVEOUTCAPS)) == MMSYSERR_NOERROR) {
            match = true;
            fmt = woc.dwFormats;
        }
    } else {
        WAVEINCAPS woc;
        if (waveInGetDevCaps(devId, &woc, sizeof(WAVEINCAPS)) == MMSYSERR_NOERROR) {
            match = true;
            fmt = woc.dwFormats;
        }
    }
    sizez.clear();
    freqz.clear();
    channelz.clear();
    byteOrderz.clear();
    typez.clear();
    codecz.clear();

    if(match) {
        if ((fmt & WAVE_FORMAT_1M08)
            || (fmt & WAVE_FORMAT_1S08)
            || (fmt & WAVE_FORMAT_2M08)
            || (fmt & WAVE_FORMAT_2S08)
            || (fmt & WAVE_FORMAT_4M08)
            || (fmt & WAVE_FORMAT_4S08)
            || (fmt & WAVE_FORMAT_48M08)
            || (fmt & WAVE_FORMAT_48S08)
            || (fmt & WAVE_FORMAT_96M08)
            || (fmt & WAVE_FORMAT_96S08)
       ) {
            sizez.append(8);
	}
        if ((fmt & WAVE_FORMAT_1M16)
            || (fmt & WAVE_FORMAT_1S16)
            || (fmt & WAVE_FORMAT_2M16)
            || (fmt & WAVE_FORMAT_2S16)
            || (fmt & WAVE_FORMAT_4M16)
            || (fmt & WAVE_FORMAT_4S16)
            || (fmt & WAVE_FORMAT_48M16)
            || (fmt & WAVE_FORMAT_48S16)
            || (fmt & WAVE_FORMAT_96M16)
            || (fmt & WAVE_FORMAT_96S16)
       ) {
            sizez.append(16);
	}
        if ((fmt & WAVE_FORMAT_1M08)
           || (fmt & WAVE_FORMAT_1S08)
           || (fmt & WAVE_FORMAT_1M16)
           || (fmt & WAVE_FORMAT_1S16)) {
            freqz.append(11025);
	}
        if ((fmt & WAVE_FORMAT_2M08)
           || (fmt & WAVE_FORMAT_2S08)
           || (fmt & WAVE_FORMAT_2M16)
           || (fmt & WAVE_FORMAT_2S16)) {
            freqz.append(22050);
	}
        if ((fmt & WAVE_FORMAT_4M08)
           || (fmt & WAVE_FORMAT_4S08)
           || (fmt & WAVE_FORMAT_4M16)
           || (fmt & WAVE_FORMAT_4S16)) {
            freqz.append(44100);
	}
        if ((fmt & WAVE_FORMAT_48M08)
            || (fmt & WAVE_FORMAT_48S08)
            || (fmt & WAVE_FORMAT_48M16)
            || (fmt & WAVE_FORMAT_48S16)) {
            freqz.append(48000);
	}
        if ((fmt & WAVE_FORMAT_96M08)
           || (fmt & WAVE_FORMAT_96S08)
           || (fmt & WAVE_FORMAT_96M16)
           || (fmt & WAVE_FORMAT_96S16)) {
            freqz.append(96000);
        }
	channelz.append(1);
	channelz.append(2);
        if (mode == QAudio::AudioOutput) {
            channelz.append(4);
            channelz.append(6);
            channelz.append(8);
        }

	byteOrderz.append(QAudioFormat::LittleEndian);

	typez.append(QAudioFormat::SignedInt);
	typez.append(QAudioFormat::UnSignedInt);

	codecz.append(QLatin1String("audio/pcm"));
    }
    if (freqz.count() > 0)
        freqz.prepend(8000);
}

QList<QByteArray> QAudioDeviceInfoInternal::availableDevices(QAudio::Mode mode)
{
    Q_UNUSED(mode)

    QList<QByteArray> devices;
    //enumerate device fullnames through directshow api
    CoInitialize(NULL);
    ICreateDevEnum *pDevEnum = NULL;
    IEnumMoniker *pEnum = NULL;
    // Create the System device enumerator
    HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
                 CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,
                 reinterpret_cast<void **>(&pDevEnum));

    unsigned long iNumDevs = mode == QAudio::AudioOutput ? waveOutGetNumDevs() : waveInGetNumDevs();
    if (SUCCEEDED(hr)) {
        // Create the enumerator for the audio input/output category
        if (pDevEnum->CreateClassEnumerator(
             mode == QAudio::AudioOutput ? CLSID_AudioRendererCategory : CLSID_AudioInputDeviceCategory,
             &pEnum, 0) == S_OK) {
            pEnum->Reset();
            // go through and find all audio devices
            IMoniker *pMoniker = NULL;
            while (pEnum->Next(1, &pMoniker, NULL) == S_OK) {
                IPropertyBag *pPropBag;
                hr = pMoniker->BindToStorage(0,0,IID_IPropertyBag,
                     reinterpret_cast<void **>(&pPropBag));
                if (FAILED(hr)) {
                    pMoniker->Release();
                    continue; // skip this one
                }
                // Find if it is a wave device
                VARIANT var;
                VariantInit(&var);
                hr = pPropBag->Read(mode == QAudio::AudioOutput ? L"WaveOutID" : L"WaveInID", &var, 0);
                if (SUCCEEDED(hr)) {
                    LONG waveID = var.lVal;
                    if (waveID >= 0 && waveID < LONG(iNumDevs)) {
                        VariantClear(&var);
                        // Find the description
                        hr = pPropBag->Read(L"FriendlyName", &var, 0);
                        if (SUCCEEDED(hr)) {
                            QByteArray  device;
                            QDataStream ds(&device, QIODevice::WriteOnly);
                            ds << quint32(waveID) << QString::fromWCharArray(var.bstrVal);
                            devices.append(device);
                        }
                    }
                }

                pPropBag->Release();
                pMoniker->Release();
            }
        }
    }
    CoUninitialize();

    return devices;
}

QByteArray QAudioDeviceInfoInternal::defaultOutputDevice()
{
    QList<QByteArray> list = availableDevices(QAudio::AudioOutput);
    if (list.size() > 0)
        return list.at(0);
    else
        return QByteArray();
}

QByteArray QAudioDeviceInfoInternal::defaultInputDevice()
{
    QList<QByteArray> list = availableDevices(QAudio::AudioInput);
    if (list.size() > 0)
        return list.at(0);
    else
        return QByteArray();
}

QT_END_NAMESPACE