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39
40 #include "mfdecodersourcereader.h"
41
MFDecoderSourceReader(QObject * parent)42 MFDecoderSourceReader::MFDecoderSourceReader(QObject *parent)
43 : m_cRef(1)
44 , m_sourceReader(0)
45 , m_source(0)
46 {
47 Q_UNUSED(parent)
48 }
49
shutdown()50 void MFDecoderSourceReader::shutdown()
51 {
52 if (m_source) {
53 m_source->Release();
54 m_source = NULL;
55 }
56 if (m_sourceReader) {
57 m_sourceReader->Release();
58 m_sourceReader = NULL;
59 }
60 }
61
mediaSource()62 IMFMediaSource* MFDecoderSourceReader::mediaSource()
63 {
64 return m_source;
65 }
66
setSource(IMFMediaSource * source,const QAudioFormat & audioFormat)67 IMFMediaType* MFDecoderSourceReader::setSource(IMFMediaSource *source, const QAudioFormat &audioFormat)
68 {
69 IMFMediaType *mediaType = NULL;
70 if (m_source == source)
71 return mediaType;
72 if (m_source) {
73 m_source->Release();
74 m_source = NULL;
75 }
76 if (m_sourceReader) {
77 m_sourceReader->Release();
78 m_sourceReader = NULL;
79 }
80 if (!source)
81 return mediaType;
82 IMFAttributes *attr = NULL;
83 MFCreateAttributes(&attr, 1);
84 if (SUCCEEDED(attr->SetUnknown(MF_SOURCE_READER_ASYNC_CALLBACK, this))) {
85 if (SUCCEEDED(MFCreateSourceReaderFromMediaSource(source, attr, &m_sourceReader))) {
86 m_source = source;
87 m_source->AddRef();
88 m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_ALL_STREAMS), FALSE);
89 m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), TRUE);
90 IMFMediaType *pPartialType = NULL;
91 MFCreateMediaType(&pPartialType);
92 pPartialType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Audio);
93
94 if (audioFormat.sampleType() == QAudioFormat::Float) {
95 pPartialType->SetGUID(MF_MT_SUBTYPE, MFAudioFormat_Float);
96 } else {
97 pPartialType->SetGUID(MF_MT_SUBTYPE, MFAudioFormat_PCM);
98 }
99
100 m_sourceReader->SetCurrentMediaType(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), NULL, pPartialType);
101 pPartialType->Release();
102 m_sourceReader->GetCurrentMediaType(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), &mediaType);
103 // Ensure the stream is selected.
104 m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), TRUE);
105 }
106 attr->Release();
107 }
108 return mediaType;
109 }
110
reset()111 void MFDecoderSourceReader::reset()
112 {
113 if (!m_sourceReader)
114 return;
115 PROPVARIANT vPos;
116 PropVariantInit(&vPos);
117 vPos.vt = VT_I8;
118 vPos.uhVal.QuadPart = 0;
119 m_sourceReader->SetCurrentPosition(GUID_NULL, vPos);
120 }
121
readNextSample()122 void MFDecoderSourceReader::readNextSample()
123 {
124 if (!m_sourceReader)
125 return;
126 m_sourceReader->ReadSample(MF_SOURCE_READER_FIRST_AUDIO_STREAM, 0, NULL, NULL, NULL, NULL);
127 }
128
takeSamples()129 QList<IMFSample*> MFDecoderSourceReader::takeSamples() //internal samples will be cleared after this
130 {
131 QList<IMFSample*> samples;
132 m_samplesMutex.lock();
133 samples = m_cachedSamples;
134 m_cachedSamples.clear();
135 m_samplesMutex.unlock();
136 return samples;
137 }
138
139 //from IUnknown
QueryInterface(REFIID riid,LPVOID * ppvObject)140 STDMETHODIMP MFDecoderSourceReader::QueryInterface(REFIID riid, LPVOID *ppvObject)
141 {
142 if (!ppvObject)
143 return E_POINTER;
144 if (riid == IID_IMFSourceReaderCallback) {
145 *ppvObject = static_cast<IMFSourceReaderCallback*>(this);
146 } else if (riid == IID_IUnknown) {
147 *ppvObject = static_cast<IUnknown*>(this);
148 } else {
149 *ppvObject = NULL;
150 return E_NOINTERFACE;
151 }
152 AddRef();
153 return S_OK;
154 }
155
STDMETHODIMP_(ULONG)156 STDMETHODIMP_(ULONG) MFDecoderSourceReader::AddRef(void)
157 {
158 return InterlockedIncrement(&m_cRef);
159 }
160
STDMETHODIMP_(ULONG)161 STDMETHODIMP_(ULONG) MFDecoderSourceReader::Release(void)
162 {
163 LONG cRef = InterlockedDecrement(&m_cRef);
164 if (cRef == 0) {
165 this->deleteLater();
166 }
167 return cRef;
168 }
169
170 //from IMFSourceReaderCallback
OnReadSample(HRESULT hrStatus,DWORD dwStreamIndex,DWORD dwStreamFlags,LONGLONG llTimestamp,IMFSample * pSample)171 STDMETHODIMP MFDecoderSourceReader::OnReadSample(HRESULT hrStatus, DWORD dwStreamIndex,
172 DWORD dwStreamFlags, LONGLONG llTimestamp, IMFSample *pSample)
173 {
174 Q_UNUSED(hrStatus);
175 Q_UNUSED(dwStreamIndex);
176 Q_UNUSED(llTimestamp);
177 if (pSample) {
178 pSample->AddRef();
179 m_samplesMutex.lock();
180 m_cachedSamples.push_back(pSample);
181 m_samplesMutex.unlock();
182 emit sampleAdded();
183 } else if ((dwStreamFlags & MF_SOURCE_READERF_ENDOFSTREAM) == MF_SOURCE_READERF_ENDOFSTREAM) {
184 emit finished();
185 }
186 return S_OK;
187 }
188
OnFlush(DWORD)189 STDMETHODIMP MFDecoderSourceReader::OnFlush(DWORD)
190 {
191 return S_OK;
192 }
193
OnEvent(DWORD,IMFMediaEvent *)194 STDMETHODIMP MFDecoderSourceReader::OnEvent(DWORD, IMFMediaEvent*)
195 {
196 return S_OK;
197 }
198