22. Table audio

Audio is an attempt to embed audio for multiple platform using the same interface in Lua by the engine.

Each platform uses its own native audio backend, but all share the same Lua API.

For Windows it is used PortAudio.

For Linux it is used PortAudio.

For Android it is used OpenSL ES (the legacy JNI audio backend has been removed).

For macOS and iOS it is used AVFoundation, which supports WAV, MP3, AAC/M4A, OGG Vorbis (via stb_vorbis), AIFF, and more.

Important

For Android only add audio in the asset folder. If you try to read audio from external device such as SD card, it has to modify the Java code for that.

22.1. audio Methods

22.1.1. audio new

new(string file_name, boolean * in_memory, boolean * play, boolean * loop)

Create a new instance of a audio.

Parameters

  • string – file name of sound.

  • boolean – in memory , default is false.

  • boolean – play to play immediately, default is false.

  • boolean – loop to keep in loop, default is false.

Returns

audio table.

22.1.2. audio play

play(boolean * loop)
Parameters

boolean – loop to keep in loop, default is false.

Returns

boolean result

isPlaying
Returns

boolean result

22.1.3. audio pause

pause
Returns

boolean result

isPaused
Returns

boolean result

22.1.4. audio stop

stop
Returns

boolean result

22.1.5. audio volume

setVolume(number volume)
Parameters

number – volume of sound (usually 0 to 1).

Returns

boolean result

getVolume
Returns

number volume

22.1.6. audio pitch

setPitch(number pitch)
Parameters

number – pitch of sound.

Returns

boolean result

getPitch
Returns

number pitch

22.1.7. audio pan

setPan(number pan)
Parameters

number – pan of sound.

Returns

boolean result

getPan
Returns

number pan

22.1.8. audio pan

setPan(number pan)
Parameters

number – pan of sound.

Returns

boolean result

getPan
Returns

number pan

22.1.9. audio reset

reset
Returns

boolean result

22.1.10. audio len

getLen
Returns

number length of sound.

22.1.11. audio setPosition

setPan(number position)
Parameters

number – position of sound as integer.

Returns

boolean result

22.1.12. audio pan

setPan(number pan)
Parameters

number – pan of sound.

Returns

boolean result

getName
Returns

string name of sound.

22.1.13. audio persistent

setPersistent(boolean persistent)
Parameters

boolean – persistent.

isPersistent
Returns

boolean persistent.

22.1.15. audio onEnd

onEnd(function callback)
Parameters

function –

callback.

function onEndStream(audio tAudio,string name)

end