- #KODI AUDIODEVICE ADVANCEDSETTINGS.XML DRIVER#
- #KODI AUDIODEVICE ADVANCEDSETTINGS.XML CODE#
- #KODI AUDIODEVICE ADVANCEDSETTINGS.XML WINDOWS#
#KODI AUDIODEVICE ADVANCEDSETTINGS.XML DRIVER#
Whenever one of the two buffers is empty, the audio driver "calls you back", and gives you the address of the empty buffer. It can forget about the data stream for a while. The application gives the audio driver a call-back address or function, fills one buffer and starts playback, then goes off to do other processing. WASAPI, and most modern sound devices, also support a "pull" or "event-driven" mode. To do this it must constantly monitor the levels in the buffer, with short "sleeps" in between to allow other threads to run. The normal manner is in push mode - a buffer is created which the audio device draws from, and the application pushes as much data in as it can to keep that buffer full. In addition to Shared and Exclusive modes, there are two modes for how data is passed from the application to the audio driver. This interrogation is a two way process that often involves some back-and-forth depending on the format specified and the device's capabilities, once a set of compatible formats is agreed upon by application and audio driver, the application then decides how it will present the audio stream to the audio driver. WASAPI Exclusive mode allows the application to interrogate the capabilities of the audio driver, since audio is presented directly by the application to the audio driver the format that the audio is sent in by the application must be in a format that is compatible with the capabilities of the audio driver, as there is no DirectSound between to convert it. WASAPI Exclusive mode bypasses the Audio Mixer and thus the mixing/resampling layers of DirectSound so audio is passed-through as-is, this is why WASAPI should be used for encoded formats like DTS in order that they can reach the receiver unchanged for decoding there. Shared mode is in many ways similar to DirectSound as it allows other sounds to be mixed into the currently playing stream, however this mode is not supported on Kodi so won't be covered any further here. WASAPI itself has two modes, Shared and Exclusive. Partly to allow for cleaner, uncompromised or encoded audio, and for low-latency requirements like mixing and recording, Microsoft re-vamped their Kernel Streaming mode after XP and came up with WASAPI for Vista. Even more important for this thread is that you cannot pass through encoded formats, as DirectSound will not decode them and it would otherwise bit-mangle them, and there is a loss of sonic quality involved in the mixing and resampling. This means the program cannot control the sampling rate, channel count, format, etc. The disadvantages are that other programs can play at the same time, and that a program's output gets mixed to whatever the system's settings are.
#KODI AUDIODEVICE ADVANCEDSETTINGS.XML CODE#
The advantages are that programs don't need resampling code or other complexities, and any program can play sounds at the same time as others, or the same time as system sounds, because they are all mixed to one format. Every program using sound passes it's data to DirectSound and the Audio Mixer which then resamples as required so it can mix audio streams from any program together with system sounds.
#KODI AUDIODEVICE ADVANCEDSETTINGS.XML WINDOWS#
With DirectSound, Windows controls the sample rate, channel layout and other details of the audio stream via an Audio Mixer. Since Windows Vista SP1 there has two primary audio interfaces, DirectSound and WASAPI (Windows Audio Session Application Programming Interface) with WASAPI being a replacement for Windows XP's Kernel Streaming mode.ĭirectSound acts as a program-friendly middle layer between the program and the audio driver, which in turn speaks to the audio hardware. Once this is done you should be good to go in setting up audio on Kodi so refer back to AudioEngine This is a requirement if WASAPI mode is to be used in Kodi.
Step 6: Finally go to the Advanced Tab and ensure the Exclusive Mode check boxes Allow applications to take exclusive control of this device and Give exclusive mode applications priority are ticked.
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