45 lines
2.5 KiB
Factor
45 lines
2.5 KiB
Factor
! Copyright (C) 2010 Joe Groff.
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! See http://factorcode.org/license.txt for BSD license.
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USING: alien byte-arrays help.markup help.syntax kernel math
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memory ;
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IN: audio
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HELP: <audio>
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{ $values
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{ "channels" integer } { "sample-bits" integer } { "sample-rate" integer } { "size" integer } { "data" c-ptr }
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{ "audio" integer }
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}
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{ $description "Constructs an " { $link audio } " object with the given parameters." } ;
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HELP: audio
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{ $class-description "Objects of this class contain uncompressed PCM audio data. The " { $snippet "data" } " slot contains an " { $link alien } " pointer or " { $link byte-array } " with the binary PCM data, and the " { $link size } " slot indicates the length in bytes of the data. The " { $snippet "channels" } ", " { $snippet "sample-bits" } " and " { $snippet "sample-rate" } " slots indicate the number of channels (1 for mono, 2 for stereo), bits per sample, and sample rate of the data." } ;
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HELP: format-unsupported-by-openal
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{ $values
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{ "audio" audio }
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}
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{ $description "Errors of this class are thrown when " { $link openal-format } " is called on an " { $link audio } " object for which there is no OpenAL-supported format." } ;
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HELP: openal-format
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{ $values
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{ "audio" audio }
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{ "format" "an ALenum value" }
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}
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{ $description "Returns the OpenAL format value that corresponds to the format of the " { $snippet "audio" } " object. If the object's format doesn't match an OpenAL-supported format, a " { $link format-unsupported-by-openal } " error is thrown." } ;
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ARTICLE: "audio" "Audio framework"
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"The " { $vocab-link "audio" } " vocabulary and its child vocabularies provide a framework for reading audio data from disk and playing back audio using prerendered, streaming, or generated audio sources. By itself, the " { $snippet "audio" } " vocabulary provides a container class for prerendered PCM audio data:"
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{ $subsections
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audio
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<audio>
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openal-format
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}
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"The following child vocabularies provide additional audio features:"
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{ $list
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{ { $vocab-link "audio.engine" } " provides a high-level OpenAL-based engine for playing audio clips." }
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{ { $vocab-link "audio.loader" } " reads PCM data from files on disk into " { $link audio } " objects. " { $vocab-link "audio.wav" } " and " { $vocab-link "audio.aiff" } " support specific audio file formats." }
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{ { $vocab-link "audio.vorbis" } " implements an " { $snippet "audio.engine" } " compatible generator object for decoding Ogg Vorbis audio data from a stream." }
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} ;
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ABOUT: "audio"
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