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| |
| #ifndef QAUDIOBUFFER_H |
| #define QAUDIOBUFFER_H |
| |
| #include <QtCore/qshareddata.h> |
| |
| #include <QtMultimedia/qtmultimediaglobal.h> |
| #include <QtMultimedia/qmultimedia.h> |
| |
| #include <QtMultimedia/qaudio.h> |
| #include <QtMultimedia/qaudioformat.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QAbstractAudioBuffer; |
| class QAudioBufferPrivate; |
| class Q_MULTIMEDIA_EXPORT QAudioBuffer |
| { |
| public: |
| QAudioBuffer(); |
| QAudioBuffer(QAbstractAudioBuffer *provider); |
| QAudioBuffer(const QAudioBuffer &other); |
| QAudioBuffer(const QByteArray &data, const QAudioFormat &format, qint64 startTime = -1); |
| QAudioBuffer(int numFrames, const QAudioFormat &format, qint64 startTime = -1); // Initialized to empty |
| |
| QAudioBuffer& operator=(const QAudioBuffer &other); |
| |
| ~QAudioBuffer(); |
| |
| bool isValid() const; |
| |
| QAudioFormat format() const; |
| |
| int frameCount() const; |
| int sampleCount() const; |
| int byteCount() const; |
| |
| qint64 duration() const; |
| qint64 startTime() const; |
| |
| // Data modification |
| // void clear(); |
| // Other ideas |
| // operator *= |
| // operator += (need to be careful about different formats) |
| |
| // Data access |
| const void* constData() const; // Does not detach, preferred |
| const void* data() const; // Does not detach |
| void *data(); // detaches |
| |
| // Structures for easier access to stereo data |
| template <typename T> struct StereoFrameDefault { enum { Default = 0 }; }; |
| |
| template <typename T> struct StereoFrame { |
| |
| StereoFrame() |
| : left(T(StereoFrameDefault<T>::Default)) |
| , right(T(StereoFrameDefault<T>::Default)) |
| { |
| } |
| |
| StereoFrame(T leftSample, T rightSample) |
| : left(leftSample) |
| , right(rightSample) |
| { |
| } |
| |
| StereoFrame& operator=(const StereoFrame &other) |
| { |
| // Two straight assigns is probably |
| // cheaper than a conditional check on |
| // self assignment |
| left = other.left; |
| right = other.right; |
| return *this; |
| } |
| |
| T left; |
| T right; |
| |
| T average() const {return (left + right) / 2;} |
| void clear() {left = right = T(StereoFrameDefault<T>::Default);} |
| }; |
| |
| typedef StereoFrame<unsigned char> S8U; |
| typedef StereoFrame<signed char> S8S; |
| typedef StereoFrame<unsigned short> S16U; |
| typedef StereoFrame<signed short> S16S; |
| typedef StereoFrame<float> S32F; |
| |
| template <typename T> const T* constData() const { |
| return static_cast<const T*>(constData()); |
| } |
| template <typename T> const T* data() const { |
| return static_cast<const T*>(data()); |
| } |
| template <typename T> T* data() { |
| return static_cast<T*>(data()); |
| } |
| private: |
| QAudioBufferPrivate *d; |
| }; |
| |
| template <> struct QAudioBuffer::StereoFrameDefault<unsigned char> { enum { Default = 128 }; }; |
| template <> struct QAudioBuffer::StereoFrameDefault<unsigned short> { enum { Default = 32768 }; }; |
| |
| |
| QT_END_NAMESPACE |
| |
| Q_DECLARE_METATYPE(QAudioBuffer) |
| |
| #endif // QAUDIOBUFFER_H |