2020-12-17 22:11:31 -05:00
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! Copyright (C) 2020 .
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! See http://factorcode.org/license.txt for BSD license.
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USING: alien.syntax math byte-arrays sequences kernel strings arrays assocs ;
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IN: flac.format
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CONSTANT: FLAC-MAGIC 0x664c6143 ! fLaC
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CONSTANT: sync-code 0b11111111111110
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CONSTANT: MIN-BLOCK-SIZE 16
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CONSTANT: MAX-BLOCK-SIZE 65535
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CONSTANT: MAX-SAMPLE-SIZE: 4608
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CONSTANT: MAX-CHANNELS 8
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CONSTANT: MIN-BITS-PER-SAMPLE 4
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CONSTANT: MAX-BITS-PER-SAMPLE 32 ! The value is ((2^16) - 1) * 10
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CONSTANT: MAX-LPC-ORDER 32
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CONSTANT: MAX-LPC-ORDER-48000HZ 12
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CONSTANT: MIN-QLP-COEFF-PRECISION 5
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CONSTANT: MAX-QLP-COEEF-PRECISION 15
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CONSTANT: MAX-FIXED-ORDER 4
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CONSTANT: MAX-RICE-PARTITION-ORDER 15
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ERROR: not-a-flac-file ;
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ERROR: sync-code-error ;
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ERROR: invalid-channel-assignment ;
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ERROR: reserved-block-size ;
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2021-11-25 12:18:59 -05:00
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ERROR: reserved-sample-size ;
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2020-12-17 22:11:31 -05:00
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ERROR: invalid-sample-rate ;
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ERROR: reserved-subframe-type ;
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ERROR: invalid-subframe-sync ;
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ERROR: reserved-residual-coding-type ;
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2021-11-25 12:18:59 -05:00
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ERROR: invalid-blocksize/rice-partitions
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ENUM: flac-frame-blocking-strategy
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fixed-blocksize variable-blocksize ;
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2020-12-17 22:11:31 -05:00
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ENUM: flac-frame-number-type
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frame-number-type-frame
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frame-number-type-sample ;
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ENUM: flac-channel-assignment
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channels-mono
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channels-left/right
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channels-left/right/center
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channels-left/right/left-surround/right-surround
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channels-left/right/center/left-surround/right-surround
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channels-left/right/center/lfe/left-surround/right-surround
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channels-left/right/center/lfe/center-surround/side-left/side-right
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channels-left/right/center/lfe/left-surround/right-surround/side-left/side-right
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channels-left
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channels-right
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channels-mid ;
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TUPLE: flac-frame-header
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{ blocking-strategy maybe{ fixed-blocksize variable-blocksize } }
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{ blocksize integer }
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{ sample-rate integer }
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{ channels integer }
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{ channel-assignment
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maybe{ channels-mono
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channels-left/right
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channels-left/right/center
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channels-left/right/left-surround/right-surround
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channels-left/right/center/left-surround/right-surround
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channels-left/right/center/lfe/left-surround/right-surround
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channels-left/right/center/lfe/center-surround/side-left/side-right
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channels-left/right/center/lfe/left-surround/right-surround/side-left/side-right
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channels-left
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channels-right
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channels-mid } }
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{ bits-per-sample integer }
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{ frame|sample-number integer }
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{ crc integer } ;
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ENUM: flac-subframe-type
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subframe-type-constant
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subframe-type-verbatim
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subframe-type-fixed
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subframe-type-lpc ;
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ENUM: flac-entropy-coding-method-type
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entropy-coding-partitioned-rice
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entropy-coding-partitioned-rice2 ;
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TUPLE: flac-entropy-coding-method-partitioned-rice-contents
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{ parameters sequence }
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{ raw-bits sequence } ;
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2020-12-17 22:11:31 -05:00
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TUPLE: flac-entropy-coding-method-partitioned-rice
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{ order integer }
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{ contents flac-entropy-coding-method-partitioned-rice-contents } ;
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TUPLE: flac-entropy-coding-method
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{ type maybe{ entropy-coding-partitioned-rice
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entropy-coding-partitioned-rice2 } }
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{ data flac-entropy-coding-method-partitioned-rice } ;
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TUPLE: flac-subframe-constant
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{ data sequence } ;
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2020-12-17 22:11:31 -05:00
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TUPLE: flac-subframe-verbatim
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{ data sequence } ;
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2020-12-17 22:11:31 -05:00
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TUPLE: flac-subframe-fixed
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{ warmup sequence }
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{ entropy-coding-method flac-entropy-coding-method }
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residual ;
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TUPLE: flac-subframe-lpc
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{ entropy-coding-method maybe{ entropy-coding-partitioned-rice
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entropy-coding-partitioned-rice2 } }
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{ qlp-coeff-precision integer }
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{ quantization-level integer }
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{ qlp-coeff sequence }
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{ warmup sequence }
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2020-12-17 22:11:31 -05:00
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residual ;
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TUPLE: flac-subframe-header
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{ subframe-type maybe{ subframe-type-constant
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subframe-type-verbatim
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subframe-type-fixed
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subframe-type-lpc } }
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{ predictor-order maybe{ integer } }
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{ wasted-bits integer } ;
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TUPLE: flac-subframe
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{ header flac-subframe-header }
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{ data maybe{ flac-subframe-constant
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flac-subframe-verbatim
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flac-subframe-fixed
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flac-subframe-lpc } } ;
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TUPLE: flac-frame-footer
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{ crc integer } ;
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TUPLE: flac-frame
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{ header flac-frame-header }
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{ subframes sequence }
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{ footer flac-frame-footer } ;
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ENUM: metadata-type
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metadata-stream-info
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metadata-padding
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metadata-application
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metadata-seek-table
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metadata-vorbis-comment
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metadata-cuesheet
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metadata-picture
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{ metadata-invalid 127 } ;
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TUPLE: metadata-block-header
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{ last? boolean }
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{ type maybe{ metadata-stream-info
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metadata-padding
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metadata-application
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metadata-seek-table
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metadata-vorbis-comment
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metadata-cuesheet
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metadata-picture
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metadata-invalid } }
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{ length integer } ;
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TUPLE: stream-info
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{ min-block-size integer }
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{ max-block-size integer }
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{ min-frame-size integer }
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{ max-frame-size integer }
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{ sample-rate integer }
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{ channels integer }
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{ bits-per-sample integer }
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{ samples integer }
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{ md5 string } ;
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TUPLE: seek-table
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{ seek-points array } ;
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TUPLE: seek-point
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{ sample-number integer }
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{ offset integer }
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{ total-samples } ;
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TUPLE: vorbis-comment
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{ vendor-string string }
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{ comments assoc } ;
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TUPLE: flac-padding
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{ length integer } ;
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TUPLE: application
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{ id string }
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{ data byte-array } ;
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ENUM: cuesheet-track-type audio non-audio ;
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TUPLE: cuesheet-track
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{ offset integer }
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{ number number }
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{ isrc string }
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{ type integer }
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{ pre-emphasis boolean }
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{ indices array } ;
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TUPLE: cuesheet-index
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{ offset integer }
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{ number integer } ;
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TUPLE: cuesheet
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{ catalog-number integer }
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{ lead-in integer }
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{ cd? boolean }
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{ tracks array } ;
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ENUM: picture-type
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other
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file-icon
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other-file-icon
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front-cover
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back-cover
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leaflet-page
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media
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lead-artist/performer/soloist
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artist/performer
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conductor
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band/orchestra
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composer
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lyricist/text-writer
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recording-location
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during-recording
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during-performance
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movie/video-screen-capture
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bright-coloured-fish
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illustration
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badn/artist-logotype
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publisher/studio-logotype ;
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TUPLE: picture
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type
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{ mime-type string }
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{ description string }
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{ width integer }
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{ height integer }
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{ depth integer }
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{ colors integer }
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{ data byte-array } ;
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TUPLE: metadata
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{ stream-info stream-info }
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{ padding maybe{ flac-padding } }
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{ application maybe{ application } }
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{ seek-table maybe{ seek-table } }
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{ vorbis-comment maybe{ vorbis-comment } }
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{ cuesheet maybe{ cuesheet } }
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{ picture maybe{ sequence } initial: { } } ;
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