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sf::SoundBufferRecorder Class Reference
Audio module

Specialized SoundRecorder which stores the captured audio data into a sound buffer. More...

`#include <SFML/Audio/SoundBufferRecorder.hpp>`

Inheritance diagram for sf::SoundBufferRecorder:

## Public Member Functions
| ~SoundBufferRecorder () override
| destructor
const SoundBuffer & | getBuffer () const
| Get the sound buffer containing the captured audio data.
bool | start (unsigned int sampleRate=44100)
| Start the capture.
void | stop ()
| Stop the capture.
unsigned int | getSampleRate () const
| Get the sample rate.
bool | setDevice (const std::string &name)
| Set the audio capture device.
const std::string & | getDevice () const
| Get the name of the current audio capture device.
void | setChannelCount (unsigned int channelCount)
| Set the channel count of the audio capture device.
unsigned int | getChannelCount () const
| Get the number of channels used by this recorder.
const std::vector< SoundChannel > & | getChannelMap () const
| Get the map of position in sample frame to sound channel.

## Static Public Member Functions
static std::vector< std::string > | getAvailableDevices ()
| Get a list of the names of all available audio capture devices.
static std::string | getDefaultDevice ()
| Get the name of the default audio capture device.
static bool | isAvailable ()
| Check if the system supports audio capture.

## Protected Member Functions
bool | onStart () override
| Start capturing audio data.
bool | onProcessSamples (const std::int16_t *samples, std::size_t sampleCount) override
| Process a new chunk of recorded samples.
void | onStop () override
| Stop capturing audio data.

## Detailed Description

Specialized SoundRecorder which stores the captured audio data into a sound buffer.

`sf::SoundBufferRecorder` allows to access a recorded sound through a `sf::SoundBuffer`, so that it can be played, saved to a file, etc.

It has the same simple interface as its base class (`start()`, `stop()`) and adds a function to retrieve the recorded sound buffer (`getBuffer()`).

As usual, don't forget to call the `isAvailable()` function before using this class (see `sf::SoundRecorder` for more details about this).

Usage example:

if (sf::SoundBufferRecorder::isAvailable())
{
// Record some audio data
sf::SoundBufferRecorder recorder;
if (!recorder.start())
{
// Handle error...
}
...
recorder.stop();
// Get the buffer containing the captured audio data
const sf::SoundBuffer& buffer = recorder.getBuffer();
// Save it to a file (for example...)
if (!buffer.saveToFile("my_record.ogg"))
{
// Handle error...
}
}
sf::SoundBufferRecorder
Specialized SoundRecorder which stores the captured audio data into a sound buffer.
Definition SoundBufferRecorder.hpp:49
sf::SoundBufferRecorder::getBuffer
const SoundBuffer & getBuffer() const
Get the sound buffer containing the captured audio data.
sf::SoundBuffer
Storage for audio samples defining a sound.
Definition SoundBuffer.hpp:55
sf::SoundBuffer::saveToFile
bool saveToFile(const std::filesystem::path &filename) const
Save the sound buffer to an audio file.
sf::SoundRecorder::start
bool start(unsigned int sampleRate=44100)
Start the capture.
sf::SoundRecorder::stop
void stop()
Stop the capture.
sf::SoundRecorder::isAvailable
static bool isAvailable()
Check if the system supports audio capture.

See also
  `sf::SoundRecorder`

Definition at line 48 of file SoundBufferRecorder.hpp.

## Constructor & Destructor Documentation

## ◆ ~SoundBufferRecorder()

sf::SoundBufferRecorder::~SoundBufferRecorder | ( |  | ) |
| override

destructor

## Member Function Documentation

## ◆ getAvailableDevices()

static std::vector< std::string > sf::SoundRecorder::getAvailableDevices | ( |  | ) |
| static nodiscard inherited

Get a list of the names of all available audio capture devices.

This function returns a vector of strings, containing the names of all available audio capture devices.

Returns
  A vector of strings containing the names

## ◆ getBuffer()

const SoundBuffer & sf::SoundBufferRecorder::getBuffer | ( |  | ) | const
| nodiscard

Get the sound buffer containing the captured audio data.

The sound buffer is valid only after the capture has ended. This function provides a read-only access to the internal sound buffer, but it can be copied if you need to make any modification to it.

Returns
  Read-only access to the sound buffer

## ◆ getChannelCount()

unsigned int sf::SoundRecorder::getChannelCount | ( |  | ) | const
| nodiscard inherited

Get the number of channels used by this recorder.

Currently only mono and stereo are supported, so the value is either 1 (for mono) or 2 (for stereo).

Returns
  Number of channels

See also
  `setChannelCount`

## ◆ getChannelMap()

const std::vector< SoundChannel > & sf::SoundRecorder::getChannelMap | ( |  | ) | const
| nodiscard inherited

Get the map of position in sample frame to sound channel.

This is used to map a sample in the sample stream to a position during spatialization.

Returns
  Map of position in sample frame to sound channel

## ◆ getDefaultDevice()

static std::string sf::SoundRecorder::getDefaultDevice | ( |  | ) |
| static nodiscard inherited

Get the name of the default audio capture device.

This function returns the name of the default audio capture device. If none is available, an empty string is returned.

Returns
  The name of the default audio capture device

## ◆ getDevice()

const std::string & sf::SoundRecorder::getDevice | ( |  | ) | const
| nodiscard inherited

Get the name of the current audio capture device.

Returns
  The name of the current audio capture device

## ◆ getSampleRate()

unsigned int sf::SoundRecorder::getSampleRate | ( |  | ) | const
| nodiscard inherited

Get the sample rate.

The sample rate defines the number of audio samples captured per second. The higher, the better the quality (for example, 44100 samples/sec is CD quality).

Returns
  Sample rate, in samples per second

## ◆ isAvailable()

static bool sf::SoundRecorder::isAvailable | ( |  | ) |
| static nodiscard inherited

Check if the system supports audio capture.

This function should always be called before using the audio capture features. If it returns `false`, then any attempt to use `sf::SoundRecorder` or one of its derived classes will fail.

Returns
  `true` if audio capture is supported, `false` otherwise

## ◆ onProcessSamples()

bool sf::SoundBufferRecorder::onProcessSamples | ( | const std::int16_t * | samples,
|  | std::size_t | sampleCount )
| nodiscard override protected virtual

Process a new chunk of recorded samples.

Parameters

  samples | Pointer to the new chunk of recorded samples
  sampleCount | Number of samples pointed by samples

Returns
  `true` to continue the capture, or `false` to stop it

Implements sf::SoundRecorder.

## ◆ onStart()

bool sf::SoundBufferRecorder::onStart | ( |  | ) |
| nodiscard override protected virtual

Start capturing audio data.

Returns
  `true` to start the capture, or `false` to abort it

Reimplemented from sf::SoundRecorder.

## ◆ onStop()

void sf::SoundBufferRecorder::onStop | ( |  | ) |
| override protected virtual

Stop capturing audio data.

Reimplemented from sf::SoundRecorder.

## ◆ setChannelCount()

void sf::SoundRecorder::setChannelCount | ( | unsigned int | channelCount | ) |
| inherited

Set the channel count of the audio capture device.

This method allows you to specify the number of channels used for recording. Currently only 16-bit mono and 16-bit stereo are supported.

Parameters

  channelCount | Number of channels. Currently only mono (1) and stereo (2) are supported.

See also
  `getChannelCount`

## ◆ setDevice()

bool sf::SoundRecorder::setDevice | ( | const std::string & | name | ) |
| nodiscard inherited

Set the audio capture device.

This function sets the audio capture device to the device with the given `name`. It can be called on the fly (i.e: while recording). If you do so while recording and opening the device fails, it stops the recording.

Parameters

  name | The name of the audio capture device

Returns
  `true`, if it was able to set the requested device

See also
  `getAvailableDevices`, `getDefaultDevice`

## ◆ start()

bool sf::SoundRecorder::start | ( | unsigned int | sampleRate = 44100 | ) |
| nodiscard inherited

Start the capture.

The `sampleRate` parameter defines the number of audio samples captured per second. The higher, the better the quality (for example, 44100 samples/sec is CD quality). This function uses its own thread so that it doesn't block the rest of the program while the capture runs. Please note that only one capture can happen at the same time. You can select which capture device will be used by passing the name to the `setDevice()` method. If none was selected before, the default capture device will be used. You can get a list of the names of all available capture devices by calling `getAvailableDevices()`.

Parameters

  sampleRate | Desired capture rate, in number of samples per second

Returns
  `true`, if start of capture was successful

See also
  `stop`, `getAvailableDevices`

## ◆ stop()

void sf::SoundRecorder::stop | ( |  | ) |
| inherited

Stop the capture.

See also
  `start`

The documentation for this class was generated from the following file:

- SoundBufferRecorder.hpp