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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2008 Laurent Gomila (laurent.gom@gmail.com)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#ifndef SFML_SOUNDRECORDER_HPP
#define SFML_SOUNDRECORDER_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/System/Thread.hpp>
#include <vector>
namespace sf
{
////////////////////////////////////////////////////////////
/// SoundRecorder is an interface for capturing sound data,
/// it is meant to be used as a base class
////////////////////////////////////////////////////////////
class SFML_API SoundRecorder : private Thread
{
public :
typedef bool (*FuncType)(const Int16*, std::size_t, void*);
////////////////////////////////////////////////////////////
/// Construct the sound recorder with a callback function
/// for processing captured samples
///
/// \param Callback : Callback for processing captured samples
/// \param UserData : Data to pass to the callback function (NULL by default)
///
////////////////////////////////////////////////////////////
SoundRecorder(FuncType Callback, void* UserData = NULL);
////////////////////////////////////////////////////////////
/// Virtual destructor
///
////////////////////////////////////////////////////////////
virtual ~SoundRecorder();
////////////////////////////////////////////////////////////
/// Start the capture.
/// Warning : only one capture can happen at the same time
///
/// \param SampleRate : Sound frequency (the more samples, the higher the quality)
/// (44100 by default = CD quality)
///
////////////////////////////////////////////////////////////
void Start(unsigned int SampleRate = 44100);
////////////////////////////////////////////////////////////
/// Stop the capture
///
////////////////////////////////////////////////////////////
void Stop();
////////////////////////////////////////////////////////////
/// Get the sample rate
///
/// \return Frequency, in samples per second
///
////////////////////////////////////////////////////////////
unsigned int GetSampleRate() const;
////////////////////////////////////////////////////////////
/// Tell if the system supports sound capture.
/// If not, this class won't be usable
///
/// \return True if audio capture is supported
///
////////////////////////////////////////////////////////////
static bool CanCapture();
protected :
////////////////////////////////////////////////////////////
/// Default constructor
///
////////////////////////////////////////////////////////////
SoundRecorder();
private :
////////////////////////////////////////////////////////////
/// Process a new chunk of recorded samples
///
/// \param Samples : Pointer to the new chunk of recorded samples
/// \param SamplesCount : Number of samples pointed by Samples
///
/// \return False to stop recording audio data, true to continue
///
////////////////////////////////////////////////////////////
virtual bool ProcessSamples(const Int16* Samples, std::size_t SamplesCount);
////////////////////////////////////////////////////////////
/// /see Thread::Run
///
////////////////////////////////////////////////////////////
virtual void Run();
////////////////////////////////////////////////////////////
/// Get the available captured samples and process them
///
////////////////////////////////////////////////////////////
void ProcessCapturedSamples();
////////////////////////////////////////////////////////////
/// Clean up the recorder internal resources
///
////////////////////////////////////////////////////////////
void CleanUp();
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
FuncType myCallback; ///< Callback for processing captured samples
void* myUserData; ///< User data to pass to the processing callback
std::vector<Int16> mySamples; ///< Buffer to store captured samples
unsigned int mySampleRate; ///< Sample rate
bool myIsCapturing; ///< Capturing state
};
} // namespace sf
#endif // SFML_SOUNDRECORDER_HPP
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