SFML/include/SFML/Audio/SoundBuffer.hpp

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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2009 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_SOUNDBUFFER_HPP
#define SFML_SOUNDBUFFER_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Audio/Export.hpp>
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#include <SFML/System/Time.hpp>
#include <string>
#include <vector>
#include <set>
namespace sf
{
namespace priv
{
class SoundFile;
}
class Sound;
class InputStream;
////////////////////////////////////////////////////////////
/// \brief Storage for audio samples defining a sound
///
////////////////////////////////////////////////////////////
class SFML_AUDIO_API SoundBuffer
{
public :
////////////////////////////////////////////////////////////
/// \brief Default constructor
///
////////////////////////////////////////////////////////////
SoundBuffer();
////////////////////////////////////////////////////////////
/// \brief Copy constructor
///
/// \param copy Instance to copy
///
////////////////////////////////////////////////////////////
SoundBuffer(const SoundBuffer& copy);
////////////////////////////////////////////////////////////
/// \brief Destructor
///
////////////////////////////////////////////////////////////
~SoundBuffer();
////////////////////////////////////////////////////////////
/// \brief Load the sound buffer from a file
///
/// Here is a complete list of all the supported audio formats:
/// ogg, wav, flac, aiff, au, raw, paf, svx, nist, voc, ircam,
/// w64, mat4, mat5 pvf, htk, sds, avr, sd2, caf, wve, mpc2k, rf64.
///
/// \param filename Path of the sound file to load
///
/// \return True if loading succeeded, false if it failed
///
/// \see LoadFromMemory, LoadFromStream, LoadFromSamples, SaveToFile
///
////////////////////////////////////////////////////////////
bool LoadFromFile(const std::string& filename);
////////////////////////////////////////////////////////////
/// \brief Load the sound buffer from a file in memory
///
/// Here is a complete list of all the supported audio formats:
/// ogg, wav, flac, aiff, au, raw, paf, svx, nist, voc, ircam,
/// w64, mat4, mat5 pvf, htk, sds, avr, sd2, caf, wve, mpc2k, rf64.
///
/// \param data Pointer to the file data in memory
/// \param sizeInBytes Size of the data to load, in bytes
///
/// \return True if loading succeeded, false if it failed
///
/// \see LoadFromFile, LoadFromStream, LoadFromSamples
///
////////////////////////////////////////////////////////////
bool LoadFromMemory(const void* data, std::size_t sizeInBytes);
////////////////////////////////////////////////////////////
/// \brief Load the sound buffer from a custom stream
///
/// Here is a complete list of all the supported audio formats:
/// ogg, wav, flac, aiff, au, raw, paf, svx, nist, voc, ircam,
/// w64, mat4, mat5 pvf, htk, sds, avr, sd2, caf, wve, mpc2k, rf64.
///
/// \param stream Source stream to read from
///
/// \return True if loading succeeded, false if it failed
///
/// \see LoadFromFile, LoadFromMemory, LoadFromSamples
///
////////////////////////////////////////////////////////////
bool LoadFromStream(InputStream& stream);
////////////////////////////////////////////////////////////
/// \brief Load the sound buffer from an array of audio samples
///
/// The assumed format of the audio samples is 16 bits signed integer
/// (sf::Int16).
///
/// \param samples Pointer to the array of samples in memory
/// \param sampleCount Number of samples in the array
/// \param channelCount Number of channels (1 = mono, 2 = stereo, ...)
/// \param sampleRate Sample rate (number of samples to play per second)
///
/// \return True if loading succeeded, false if it failed
///
/// \see LoadFromFile, LoadFromMemory, SaveToFile
///
////////////////////////////////////////////////////////////
bool LoadFromSamples(const Int16* samples, std::size_t sampleCount, unsigned int channelCount, unsigned int sampleRate);
////////////////////////////////////////////////////////////
/// \brief Save the sound buffer to an audio file
///
/// Here is a complete list of all the supported audio formats:
/// ogg, wav, flac, aiff, au, raw, paf, svx, nist, voc, ircam,
/// w64, mat4, mat5 pvf, htk, sds, avr, sd2, caf, wve, mpc2k, rf64.
///
/// \param filename Path of the sound file to write
///
/// \return True if saving succeeded, false if it failed
///
/// \see LoadFromFile, LoadFromMemory, LoadFromSamples
///
////////////////////////////////////////////////////////////
bool SaveToFile(const std::string& filename) const;
////////////////////////////////////////////////////////////
/// \brief Get the array of audio samples stored in the buffer
///
/// The format of the returned samples is 16 bits signed integer
/// (sf::Int16). The total number of samples in this array
/// is given by the GetSampleCount() function.
///
/// \return Read-only pointer to the array of sound samples
///
/// \see GetSampleCount
///
////////////////////////////////////////////////////////////
const Int16* GetSamples() const;
////////////////////////////////////////////////////////////
/// \brief Get the number of samples stored in the buffer
///
/// The array of samples can be accessed with the GetSamples()
/// function.
///
/// \return Number of samples
///
/// \see GetSamples
///
////////////////////////////////////////////////////////////
std::size_t GetSampleCount() const;
////////////////////////////////////////////////////////////
/// \brief Get the sample rate of the sound
///
/// The sample rate is the number of samples played per second.
/// The higher, the better the quality (for example, 44100
/// samples/s is CD quality).
///
/// \return Sample rate (number of samples per second)
///
/// \see GetChannelCount, GetDuration
///
////////////////////////////////////////////////////////////
unsigned int GetSampleRate() const;
////////////////////////////////////////////////////////////
/// \brief Get the number of channels used by the sound
///
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/// If the sound is mono then the number of channels will
/// be 1, 2 for stereo, etc.
///
/// \return Number of channels
///
/// \see GetSampleRate, GetDuration
///
////////////////////////////////////////////////////////////
unsigned int GetChannelCount() const;
////////////////////////////////////////////////////////////
/// \brief Get the total duration of the sound
///
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/// \return Sound duration
///
/// \see GetSampleRate, GetChannelCount
///
////////////////////////////////////////////////////////////
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Time GetDuration() const;
////////////////////////////////////////////////////////////
/// \brief Overload of assignment operator
///
/// \param right Instance to assign
///
/// \return Reference to self
///
////////////////////////////////////////////////////////////
SoundBuffer& operator =(const SoundBuffer& right);
private :
friend class Sound;
////////////////////////////////////////////////////////////
/// \brief Initialize the internal state after loading a new sound
///
/// \param file Sound file providing access to the new loaded sound
///
/// \return True on succesful initialization, false on failure
///
////////////////////////////////////////////////////////////
bool Initialize(priv::SoundFile& file);
////////////////////////////////////////////////////////////
/// \brief Update the internal buffer with the cached audio samples
///
/// \param channelCount Number of channels
/// \param sampleRate Sample rate (number of samples per second)
///
/// \return True on success, false if any error happened
///
////////////////////////////////////////////////////////////
bool Update(unsigned int channelCount, unsigned int sampleRate);
////////////////////////////////////////////////////////////
/// \brief Add a sound to the list of sounds that use this buffer
///
/// \param sound Sound instance to attach
///
////////////////////////////////////////////////////////////
void AttachSound(Sound* sound) const;
////////////////////////////////////////////////////////////
/// \brief Remove a sound from the list of sounds that use this buffer
///
/// \param sound Sound instance to detach
///
////////////////////////////////////////////////////////////
void DetachSound(Sound* sound) const;
////////////////////////////////////////////////////////////
// Types
////////////////////////////////////////////////////////////
typedef std::set<Sound*> SoundList; ///< Set of unique sound instances
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
unsigned int m_buffer; ///< OpenAL buffer identifier
std::vector<Int16> m_samples; ///< Samples buffer
Time m_duration; ///< Sound duration
mutable SoundList m_sounds; ///< List of sounds that are using this buffer
};
} // namespace sf
#endif // SFML_SOUNDBUFFER_HPP
////////////////////////////////////////////////////////////
/// \class sf::SoundBuffer
/// \ingroup audio
///
/// A sound buffer holds the data of a sound, which is
/// an array of audio samples. A sample is a 16 bits signed integer
/// that defines the amplitude of the sound at a given time.
/// The sound is then restituted by playing these samples at
/// a high rate (for example, 44100 samples per second is the
/// standard rate used for playing CDs). In short, audio samples
/// are like texture pixels, and a sf::SoundBuffer is similar to
/// a sf::Texture.
///
/// A sound buffer can be loaded from a file (see LoadFromFile()
/// for the complete list of supported formats), from memory, from
/// a custom stream (see sf::InputStream) or directly from an array
/// of samples. It can also be saved back to a file.
///
/// Sound buffers alone are not very useful: they hold the audio data
/// but cannot be played. To do so, you need to use the sf::Sound class,
/// which provides functions to play/pause/stop the sound as well as
/// changing the way it is outputted (volume, pitch, 3D position, ...).
/// This separation allows more flexibility and better performances:
/// indeed a sf::SoundBuffer is a heavy resource, and any operation on it
/// is slow (often too slow for real-time applications). On the other
/// side, a sf::Sound is a lightweight object, which can use the audio data
/// of a sound buffer and change the way it is played without actually
/// modifying that data. Note that it is also possible to bind
/// several sf::Sound instances to the same sf::SoundBuffer.
///
/// It is important to note that the sf::Sound instance doesn't
/// copy the buffer that it uses, it only keeps a reference to it.
/// Thus, a sf::SoundBuffer must not be destructed while it is
/// used by a sf::Sound (i.e. never write a function that
/// uses a local sf::SoundBuffer instance for loading a sound).
///
/// Usage example:
/// \code
/// // Declare a new sound buffer
/// sf::SoundBuffer buffer;
///
/// // Load it from a file
/// if (!buffer.LoadFromFile("sound.wav"))
/// {
/// // error...
/// }
///
/// // Create a sound source and bind it to the buffer
/// sf::Sound sound1;
/// sound1.SetBuffer(buffer);
///
/// // Play the sound
/// sound1.Play();
///
/// // Create another sound source bound to the same buffer
/// sf::Sound sound2;
/// sound2.SetBuffer(buffer);
///
/// // Play it with a higher pitch -- the first sound remains unchanged
/// sound2.SetPitch(2);
/// sound2.Play();
/// \endcode
///
/// \see sf::Sound, sf::SoundBufferRecorder
///
////////////////////////////////////////////////////////////