working decoder
parent
3246b2c064
commit
f2402fa759
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@ -200,7 +200,7 @@ SYMBOL: current-flac-output
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read-flac-subframe-wasted-bits
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read-flac-subframe-wasted-bits
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flac-subframe-header boa ;
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flac-subframe-header boa ;
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: calculate-sample-depth ( bps channel-assignment wasted-bits channel -- sample-depth )
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: calculate-sample-depth ( bps wasted-bits channel-assignment channel -- sample-depth )
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[ - ] 2dip swap
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[ - ] 2dip swap
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{
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{
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{ channel-assignment-left [ 1 = [ 1 ] [ 0 ] if ] }
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{ channel-assignment-left [ 1 = [ 1 ] [ 0 ] if ] }
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@ -238,7 +238,7 @@ SYMBOL: current-flac-output
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frame-header bits-per-sample>> :> bps
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frame-header bits-per-sample>> :> bps
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frame-header blocksize>> :> blocksize
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frame-header blocksize>> :> blocksize
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frame-header channel-assignment>> :> channel-assignment
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frame-header channel-assignment>> :> channel-assignment
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bps channel-assignment wasted-bits channel calculate-sample-depth :> sample-depth
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bps wasted-bits channel-assignment channel calculate-sample-depth :> sample-depth
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subframe-type
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subframe-type
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{
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{
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@ -0,0 +1,49 @@
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USING: kernel audio.wav io io.files io.encodings.ascii io.encodings.binary io.encodings.string endian accessors math sequences ;
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USING: flac.decoder flac.stream flac.metadata ;
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USING: specialized-arrays alien.c-types prettyprint io.encodings.utf8 ;
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IN: flac
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:: wav-header ( stream-info -- byte-array )
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RIFF-MAGIC ascii encode
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stream-info samples>> stream-info channels>> stream-info bits-per-sample>> 8 /i * * 36 + 4 >le
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WAVE-MAGIC ascii encode
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FMT-MAGIC ascii encode
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16 4 >le
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1 2 >le
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stream-info channels>> 2 >le
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stream-info sample-rate>> 4 >le
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stream-info sample-rate>> stream-info channels>> stream-info bits-per-sample>> 8 /i * * 4 >le
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stream-info channels>> stream-info bits-per-sample>> 8 /i * 2 >le
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stream-info bits-per-sample>> 2 >le
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DATA-MAGIC ascii encode
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stream-info samples>> stream-info channels>> stream-info bits-per-sample>> 8 /i * * 4 >le
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'{ _ _ _ _ _ _ _ _ _ _ _ _ _ } B{ } concat-as ;
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:: write-frame ( sample-depth channels blocksize samples -- )
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sample-depth 8 /i :> sample-bytes
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sample-depth 8 = [ 128 ] [ 0 ] if :> addend
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blocksize <iota> [| block |
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channels <iota> [| channel |
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block channel samples nth nth addend + sample-bytes >le write
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] each
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] each ;
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! TODO: actually write good code
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: decode-file ( flac-file -- )
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[
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"/home/steve/FACTOR.wav" binary [
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read-stream-info/seek-data
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dup
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[ wav-header write ]
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[ samples>> ] bi
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swap <repetition>
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[
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[ [ bits-per-sample>> ] [ channels>> ] bi ]
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[ read-flac-frame ] bi
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[ header>> blocksize>> ] [ samples>> ] bi
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write-frame
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] each
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] with-file-writer
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] with-flac-file-reader ;
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@ -1,14 +1,13 @@
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USING: kernel namespaces accessors sequences destructors io.files io.encodings.binary math math.functions math.bitwise ;
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USING: kernel namespaces accessors sequences destructors io io.files io.encodings.binary math math.functions math.bitwise ;
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FROM: flac.format => FLAC-MAGIC not-a-flac-stream ;
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FROM: flac.format => FLAC-MAGIC not-a-flac-stream ;
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QUALIFIED: bitstreams
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QUALIFIED: bitstreams
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QUALIFIED: io
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QUALIFIED: io
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USING: prettyprint ;
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IN: flac.stream
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IN: flac.stream
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SYMBOL: flac-input-stream
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SYMBOL: flac-input-stream
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CONSTANT: default-bitreader-capacity 65536
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CONSTANT: default-bitreader-capacity 6553600
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TUPLE: flac-stream-reader stream bitstream ;
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TUPLE: flac-stream-reader stream bitstream ;
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@ -25,6 +24,14 @@ M: flac-stream-reader dispose stream>> dispose ;
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dup bytes>> swap [ prepend ] dip swap >>bytes drop
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dup bytes>> swap [ prepend ] dip swap >>bytes drop
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] while flac-input-stream get bitstream>> bitstreams:read ;
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] while flac-input-stream get bitstream>> bitstreams:read ;
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: flac-seek ( n -- )
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[ dup flac-input-stream get bitstream>> bitstreams:enough-bits? not ]
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[
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flac-input-stream get
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[ stream>> default-bitreader-capacity swap io:stream-read ] [ bitstream>> ] bi
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dup bytes>> swap [ prepend ] dip swap >>bytes drop
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] while flac-input-stream get bitstream>> bitstreams:seek ;
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: flac-align-to-byte ( -- )
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: flac-align-to-byte ( -- )
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8 flac-input-stream get bitstream>> bitstreams:align ;
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8 flac-input-stream get bitstream>> bitstreams:align ;
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