public:

typedef cef_channel_layout_t ChannelLayout;

///

/// Called on the UI thread to allow configuration of audio stream parameters.

/// Return true to proceed with audio stream capture, or false to cancel it.

/// All members of |params| can optionally be configured here, but they are

/// also pre-filled with some sensible defaults.

///

/*--cef()--*/

virtual bool GetAudioParameters(CefRefPtr<CefBrowser> browser,

CefAudioParameters& params) {

return true;

}

///

/// Called on a browser audio capture thread when the browser starts

/// streaming audio. OnAudioStreamStopped will always be called after

/// OnAudioStreamStarted; both methods may be called multiple times

/// for the same browser. |params| contains the audio parameters like

/// sample rate and channel layout. |channels| is the number of channels.

///

/*--cef()--*/

virtual void OnAudioStreamStarted(CefRefPtr<CefBrowser> browser,

const CefAudioParameters& params,

int channels) = 0;

///

/// Called on the audio stream thread when a PCM packet is received for the

/// stream. |data| is an array representing the raw PCM data as a floating

/// point type, i.e. 4-byte value(s). |frames| is the number of frames in the

/// PCM packet. |pts| is the presentation timestamp (in milliseconds since the

/// Unix Epoch) and represents the time at which the decompressed packet

/// should be presented to the user. Based on |frames| and the

/// |channel_layout| value passed to OnAudioStreamStarted you can calculate

/// the size of the |data| array in bytes.

///

/*--cef()--*/

virtual void OnAudioStreamPacket(CefRefPtr<CefBrowser> browser,

const float** data,

int frames,

int64_t pts) = 0;

///

/// Called on the UI thread when the stream has stopped. OnAudioSteamStopped

/// will always be called after OnAudioStreamStarted; both methods may be

/// called multiple times for the same stream.

///

/*--cef()--*/

virtual void OnAudioStreamStopped(CefRefPtr<CefBrowser> browser) = 0;

///

/// Called on the UI or audio stream thread when an error occurred. During the

/// stream creation phase this callback will be called on the UI thread while

/// in the capturing phase it will be called on the audio stream thread. The

/// stream will be stopped immediately.

///

/*--cef()--*/

virtual void OnAudioStreamError(CefRefPtr<CefBrowser> browser,

const CefString& message) = 0;