generate-audio ( generator -- c-ptr size )
Audio playback engine » Audio generator protocol

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generator-audio-format ( generator -- channels sample-bits sample-rate )

Vocabulary
audio.engine

Inputs

generator

an object implementing the Audio generator protocol

Outputs

c-ptr	a c-ptr or f
size	an integer or f

Word description
Tells generator to generate another block of PCM data. c-ptr can be a byte-array or alien pointer. size indicates the size in bytes of the returned buffer. The generator is allowed to reuse the buffer; the engine will copy the data to its own internal buffer before its next call to generate-audio. The method can provide f for both outputs or a size of 0 to indicate that its stream is exhausted.

Definition

IN: audio.engine

GENERIC: generate-audio ( generator -- c-ptr size )

Methods

USING: audio.engine audio.engine.test kernel random ranges
sequences specialized-arrays.instances.alien.c-types.short ;

M: noise-generator generate-audio
    drop 4096
    [ -4096 4096 [a..b] random ] short-array{ } replicate-as
    8192 ;


USING: accessors audio.engine audio.vorbis audio.vorbis.private
kernel ;

M: vorbis-stream generate-audio
    [ buffer>> ] [ 0 decode-audio ] bi ;