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flac
Steve Ayerhart 2020-03-25 23:45:47 -05:00
parent 776ab11a08
commit c1db0336f2
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2 changed files with 74 additions and 68 deletions
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70
extra/flac/decoder/decoder.factor
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@ -1,8 +1,8 @@
! Copyright (C) 2020 .
! See http://factorcode.org/license.txt for BSD license.
USING: alien.syntax math io.encodings.binary kernel io io.files locals endian bit-arrays math.intervals combinators math.order sequences io.streams.peek io.binary namespaces accessors byte-arrays ;
USING: math io.encodings.binary kernel io io.files locals endian bit-arrays math.intervals combinators math.order sequences io.streams.peek io.binary namespaces accessors byte-arrays ;
USING: prettyprint ;
USING: flac.metadata.private flac.metadata ;
USING: flac.metadata.private flac.metadata flac.format ;
QUALIFIED: bitstreams
@ -19,72 +19,6 @@ ERROR: invalid-sample-rate ;
ERROR: invalid-subframe-type ;
ERROR: invalid-subframe-sync ;
ENUM: flac-channel-assignment
channels-mono
channels-left/right
channels-left/right/center
channels-left/right/left-surround/right-surround
channels-left/right/center/left-surround/right-surround
channels-left/right/center/lfe/left-surround/right-surround
channels-left/right/center/lfe/center-surround/side-left/side-right
channels-left/right/center/lfe/left-surround/right-surround/side-left/side-right
channels-left
channels-right
channels-mid ;
ENUM: flac-frame-number-type
frame-number-type-frame
frame-number-type-sample ;
ENUM: flac-subframe-type
subframe-type-constant
subframe-type-verbatim
subframe-type-fixed
subframe-type-lpc ;
ENUM: flac-entropy-coding-method
entropy-coding-partioned-rice
entropy-coding-partioned-rice2 ;
TUPLE: flac-subframe-header
{ subframe-type maybe{ subframe-type-constant
subframe-type-verbatim
subframe-type-fixed
subframe-type-lpc } }
{ wasted-bits integer } ;
TUPLE: flac-subframe
{ subframe-header flac-subframe-header }
{ data byte-array } ;
TUPLE: flac-frame-header
{ number-type maybe{ frame-number-type-frame frame-number-type-sample } }
{ blocksize integer }
{ sample-rate integer }
{ channels integer }
{ channel-assignment maybe{ channels-mono
channels-left/right
channels-left/right/center
channels-left/right/left-surround/right-surround
channels-left/right/center/left-surround/right-surround
channels-left/right/center/lfe/left-surround/right-surround
channels-left/right/center/lfe/center-surround/side-left/side-right
channels-left/right/center/lfe/left-surround/right-surround/side-left/side-right
channels-left
channels-right
channels-mid } }
{ bits-per-sample integer }
{ frame|sample-number integer }
{ crc integer } ;
TUPLE: flac-frame-footer
{ crc integer } ;
TUPLE: flac-frame
{ header flac-frame-header }
{ subframes sequence }
{ footer flac-frame-footer } ;
: 0xxxxxxx? ( n -- ? ) 0x80 bitand 0x80 = not ;
: 110xxxxx? ( n -- ? ) dup [ 0xc0 bitand 0xc0 = ] [ 0x20 bitand 0x20 = not ] bi* and ;
: 1110xxxx? ( n -- ? ) dup [ 0xe0 bitand 0xe0 = ] [ 0x10 bitand 0x10 = not ] bi* and ;

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extra/flac/format/format.factor Normal file
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! Copyright (C) 2020 .
! See http://factorcode.org/license.txt for BSD license.
USING: alien.syntax math byte-arrays sequences ;
IN: flac.format
ENUM: flac-frame-number-type
frame-number-type-frame
frame-number-type-sample ;
ENUM: flac-channel-assignment
channels-mono
channels-left/right
channels-left/right/center
channels-left/right/left-surround/right-surround
channels-left/right/center/left-surround/right-surround
channels-left/right/center/lfe/left-surround/right-surround
channels-left/right/center/lfe/center-surround/side-left/side-right
channels-left/right/center/lfe/left-surround/right-surround/side-left/side-right
channels-left
channels-right
channels-mid ;
TUPLE: flac-frame-header
{ number-type maybe{ frame-number-type-frame frame-number-type-sample } }
{ blocksize integer }
{ sample-rate integer }
{ channels integer }
{ channel-assignment
maybe{ channels-mono
channels-left/right
channels-left/right/center
channels-left/right/left-surround/right-surround
channels-left/right/center/left-surround/right-surround
channels-left/right/center/lfe/left-surround/right-surround
channels-left/right/center/lfe/center-surround/side-left/side-right
channels-left/right/center/lfe/left-surround/right-surround/side-left/side-right
channels-left
channels-right
channels-mid } }
{ bits-per-sample integer }
{ frame|sample-number integer }
{ crc integer } ;
ENUM: flac-subframe-type
subframe-type-constant
subframe-type-verbatim
subframe-type-fixed
subframe-type-lpc ;
TUPLE: flac-subframe-header
{ subframe-type maybe{ subframe-type-constant
subframe-type-verbatim
subframe-type-fixed
subframe-type-lpc } }
{ wasted-bits integer } ;
TUPLE: flac-subframe
{ subframe-header flac-subframe-header }
{ data byte-array } ;
ENUM: flac-entropy-coding-method
entropy-coding-partioned-rice
entropy-coding-partioned-rice2 ;
TUPLE: flac-frame-footer
{ crc integer } ;
TUPLE: flac-frame
{ header flac-frame-header }
{ subframes sequence }
{ footer flac-frame-footer } ;