A 0-dependency C++/C windows library for handling WASAPI loopback audio devices
WinEcho is a C++ windows library (With an extra C interface) that allows playback of WASAPI loopback render devices on other render devices.
First, get a list of devices using the winecho::MyMMDeviceEnumerator class. This class accepts a EDataFlow parameter, but the library is set up to handle only EDataFlow::eRender devices.
When you find you capture (device that you want to record the audio) and render (device that you want to playback the audio on) devices, you can generate a winecho::StreamInstance class.
The parameters are:
- Capture device
- Render devce
- Buffer size (with high latency, a large buffer may be required)
- Desired latency (in milliseconds. This is only a hint and is not guaranteed)
The winecho::StreamInstance::Start() method spawns the threads that handle capture and render.
The winecho::StreamInstance::Stop(bool wait) methods stops the threads (and with the wait parameter you choose wether to wait for the threads to finish.
The library is missing proper error handling in the C api and in the worker threads.
The C interface is only implements winecho::MyMMDeviceEnumerator, winecho::MyMMDevice and winecho::StreamInstance.