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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwindowsresampler_p.h"
#include <qwindowsaudioutils_p.h>
#include <qwindowsmediafoundation_p.h>
#include <qloggingcategory.h>
#include <QUuid>
#include <wmcodecdsp.h>
#include <mftransform.h>
#include <mferror.h>
QT_BEGIN_NAMESPACE
QUuid qIID_IMFTransform(0xbf94c121, 0x5b05, 0x4e6f, 0x80,0x00, 0xba,0x59,0x89,0x61,0x41,0x4d);
QUuid qCLSID_CResamplerMediaObject("f447b69e-1884-4a7e-8055-346f74d6edb3");
static Q_LOGGING_CATEGORY(qLcAudioResampler, "qt.multimedia.audioresampler")
QWindowsResampler::QWindowsResampler()
: m_wmf(QWindowsMediaFoundation::instance())
{
HRESULT hr = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
if (hr == RPC_E_CHANGED_MODE)
qWarning() << "Failed attempt to change apartment concurrency model";
CoCreateInstance(qCLSID_CResamplerMediaObject, nullptr, CLSCTX_INPROC_SERVER,
qIID_IMFTransform, (LPVOID*)(m_resampler.address()));
if (m_resampler)
m_resampler->AddInputStreams(1, &m_inputStreamID);
}
QWindowsResampler::~QWindowsResampler()
{
CoUninitialize();
};
quint64 QWindowsResampler::outputBufferSize(quint64 inputBufferSize) const
{
if (m_inputFormat.isValid() && m_outputFormat.isValid())
return m_outputFormat.bytesForDuration(m_inputFormat.durationForBytes(inputBufferSize));
else
return 0;
}
quint64 QWindowsResampler::inputBufferSize(quint64 outputBufferSize) const
{
if (m_inputFormat.isValid() && m_outputFormat.isValid())
return m_inputFormat.bytesForDuration(m_outputFormat.durationForBytes(outputBufferSize));
else
return 0;
}
HRESULT QWindowsResampler::processInput(const QByteArrayView &in)
{
QComPtr<IMFSample> sample;
HRESULT hr = m_wmf->mfCreateSample(sample.address());
if (FAILED(hr))
return hr;
QComPtr<IMFMediaBuffer> buffer;
hr = m_wmf->mfCreateMemoryBuffer(in.size(), buffer.address());
if (FAILED(hr))
return hr;
BYTE *data = nullptr;
DWORD maxLen = 0;
DWORD currentLen = 0;
hr = buffer->Lock(&data, &maxLen, ¤tLen);
if (FAILED(hr))
return hr;
memcpy(data, in.data(), in.size());
hr = buffer->Unlock();
if (FAILED(hr))
return hr;
hr = buffer->SetCurrentLength(in.size());
if (FAILED(hr))
return hr;
hr = sample->AddBuffer(buffer.get());
if (FAILED(hr))
return hr;
return m_resampler->ProcessInput(m_inputStreamID, sample.get(), 0);
}
HRESULT QWindowsResampler::processOutput(QByteArray &out)
{
QComPtr<IMFSample> sample;
QComPtr<IMFMediaBuffer> buffer;
if (m_resamplerNeedsSampleBuffer) {
HRESULT hr = m_wmf->mfCreateSample(sample.address());
if (FAILED(hr))
return hr;
auto expectedOutputSize = outputBufferSize(m_totalInputBytes) - m_totalOutputBytes;
hr = m_wmf->mfCreateMemoryBuffer(expectedOutputSize, buffer.address());
if (FAILED(hr))
return hr;
hr = sample->AddBuffer(buffer.get());
if (FAILED(hr))
return hr;
}
HRESULT hr = S_OK;
MFT_OUTPUT_DATA_BUFFER outputDataBuffer;
outputDataBuffer.dwStreamID = 0;
do {
outputDataBuffer.pEvents = nullptr;
outputDataBuffer.dwStatus = 0;
outputDataBuffer.pSample = m_resamplerNeedsSampleBuffer ? sample.get() : nullptr;
DWORD status = 0;
hr = m_resampler->ProcessOutput(0, 1, &outputDataBuffer, &status);
if (SUCCEEDED(hr)) {
QComPtr<IMFMediaBuffer> outputBuffer;
outputDataBuffer.pSample->ConvertToContiguousBuffer(outputBuffer.address());
DWORD len = 0;
BYTE *data = nullptr;
hr = outputBuffer->Lock(&data, nullptr, &len);
if (SUCCEEDED(hr))
out.push_back(QByteArray(reinterpret_cast<char *>(data), len));
outputBuffer->Unlock();
}
} while (SUCCEEDED(hr));
if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT)
hr = S_OK;
return hr;
}
QByteArray QWindowsResampler::resample(const QByteArrayView &in)
{
m_totalInputBytes += in.size();
if (m_inputFormat == m_outputFormat) {
m_totalOutputBytes += in.size();
return {in.data(), in.size()};
} else {
Q_ASSERT(m_resampler && m_wmf);
QByteArray out;
HRESULT hr = processInput(in);
if (SUCCEEDED(hr))
hr = processOutput(out);
if (FAILED(hr))
qCWarning(qLcAudioResampler) << "Resampling failed" << hr;
m_totalOutputBytes += out.size();
return out;
}
}
QByteArray QWindowsResampler::resample(IMFSample *sample)
{
Q_ASSERT(sample);
DWORD totalLength = 0;
HRESULT hr = sample->GetTotalLength(&totalLength);
if (FAILED(hr))
return {};
m_totalInputBytes += totalLength;
QByteArray out;
if (m_inputFormat == m_outputFormat) {
QComPtr<IMFMediaBuffer> outputBuffer;
sample->ConvertToContiguousBuffer(outputBuffer.address());
DWORD len = 0;
BYTE *data = nullptr;
hr = outputBuffer->Lock(&data, nullptr, &len);
if (SUCCEEDED(hr))
out.push_back(QByteArray(reinterpret_cast<char *>(data), len));
outputBuffer->Unlock();
} else {
Q_ASSERT(m_resampler && m_wmf);
hr = m_resampler->ProcessInput(m_inputStreamID, sample, 0);
if (SUCCEEDED(hr))
hr = processOutput(out);
if (FAILED(hr))
qCWarning(qLcAudioResampler) << "Resampling failed" << hr;
}
m_totalOutputBytes += out.size();
return out;
}
bool QWindowsResampler::setup(const QAudioFormat &fin, const QAudioFormat &fout)
{
qCDebug(qLcAudioResampler) << "Setup audio resampler" << fin << "->" << fout;
m_totalInputBytes = 0;
m_totalOutputBytes = 0;
if (fin == fout) {
qCDebug(qLcAudioResampler) << "Pass through mode";
m_inputFormat = fin;
m_outputFormat = fout;
return true;
}
if (!m_resampler || !m_wmf)
return false;
QComPtr<IMFMediaType> min = QWindowsAudioUtils::formatToMediaType(*m_wmf, fin);
QComPtr<IMFMediaType> mout = QWindowsAudioUtils::formatToMediaType(*m_wmf, fout);
HRESULT hr = m_resampler->SetInputType(m_inputStreamID, min.get(), 0);
if (FAILED(hr)) {
qCWarning(qLcAudioResampler) << "Failed to set input type" << hr;
return false;
}
hr = m_resampler->SetOutputType(0, mout.get(), 0);
if (FAILED(hr)) {
qCWarning(qLcAudioResampler) << "Failed to set output type" << hr;
return false;
}
MFT_OUTPUT_STREAM_INFO streamInfo;
hr = m_resampler->GetOutputStreamInfo(0, &streamInfo);
if (FAILED(hr)) {
qCWarning(qLcAudioResampler) << "Could not obtain stream info" << hr;
return false;
}
m_resamplerNeedsSampleBuffer = (streamInfo.dwFlags
& (MFT_OUTPUT_STREAM_PROVIDES_SAMPLES | MFT_OUTPUT_STREAM_CAN_PROVIDE_SAMPLES)) == 0;
m_inputFormat = fin;
m_outputFormat = fout;
return true;
}
QT_END_NAMESPACE
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