author | Claus Gittinger <cg@exept.de> |
Tue, 30 Apr 2019 20:07:57 +0200 | |
changeset 4258 | 5fc4985b0d74 |
parent 1452 | e79910279100 |
child 3855 | 1db7742d33ad |
child 4413 | 8c800ee6b489 |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1997 by eXept Software AG |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libview2' }" |
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parents:
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Object subclass:#RIFFReader |
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instanceVariableNames:'inStream fileType streamTypes client msb' |
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classVariableNames:'UnsupportedFormatErrorSignal' |
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poolDictionaries:'' |
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category:'System-Support-FileFormats' |
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! |
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!RIFFReader class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1997 by eXept Software AG |
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All Rights Reserved |
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||
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
|
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inclusion of the above copyright notice. This software may not |
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32 |
be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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documentation |
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" |
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Abstract helper class to read RIFF files. See concrete subclasses for details. |
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RIFF is the abstract base-format used for a whole bunch of concrete file formats: |
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WAV, AVI, AIF etc. |
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Concrete formats must be parsed by concrete readers. |
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Use: |
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define your own concrete reader, with methods getChunk_FOO:, |
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for each chunk type FOO you want to parse there. |
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Define your reader as a client to this reader, and let it processChunks. |
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See AVIReader for a concrete example. |
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This is in an experimental state and not yet finished. |
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The protocol may change. |
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! ! |
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!RIFFReader class methodsFor:'instance creation'! |
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fromFile:aFilename |
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|s reader| |
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s := aFilename asFilename readStream. |
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reader := self new fromStream:s. |
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s close. |
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^ reader |
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! ! |
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!RIFFReader class methodsFor:'class initialization'! |
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initialize |
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UnsupportedFormatErrorSignal isNil ifTrue:[ |
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UnsupportedFormatErrorSignal := ErrorSignal newSignalMayProceed:true. |
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UnsupportedFormatErrorSignal nameClass:self message:#unsupportedFormatErrorSignal. |
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]. |
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" |
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RIFFReader initialize |
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" |
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"Created: 4.4.1997 / 22:35:52 / cg" |
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"Modified: 5.4.1997 / 16:12:16 / cg" |
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! ! |
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!RIFFReader class methodsFor:'testing'! |
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isFORMFile:aFileName withAnyTypeFrom:typeList |
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"return true, if aFileName contains FORM-encoded data of format:type" |
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^ self isFile:aFileName ofType:'FORM' withAnySubtypeFrom:typeList |
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! |
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isFile:aFileName ofType:mainType withAnySubtypeFrom:typeList |
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"return true, if aFileName contains RIFF-encoded data of format:type" |
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|data1 len data3 inStream| |
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inStream := aFileName asFilename readStream. |
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inStream isNil ifTrue:[^ false]. |
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inStream binary. |
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data1 := String new:4. |
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inStream nextBytes:4 into:data1. |
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len := inStream nextLongMSB:true. |
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data3 := String new:4. |
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inStream nextBytes:4 into:data3. |
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inStream close. |
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data3 := data3 withoutTrailingSeparators. |
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((data1 = mainType) |
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and:[typeList includes:data3]) ifTrue:[ |
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^ true |
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]. |
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^ false. |
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" |
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RIFFReader isRIFFFile:'bitmaps/magtape.xpm' withType:'AVI ' |
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RIFFReader isRIFFFile:'/phys/exept/home/pd_stuff/movies/avi/drlair.avi' withType:'AVI' |
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RIFFReader isRIFFFile: '/usr/share/sounds/alsa/test.wav' withType:'WAVE' |
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" |
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"Created: 4.4.1997 / 22:35:52 / cg" |
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"Modified: 5.4.1997 / 16:12:16 / cg" |
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! |
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isRIFFFile:aFileName |
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"return true, if aFileName contains RIFF-encoded data" |
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|data1 inStream| |
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inStream := aFileName asFilename readStream. |
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inStream isNil ifTrue:[^ false]. |
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inStream binary. |
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data1 := String new:4. |
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inStream nextBytes:4 into:data1. |
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inStream close. |
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^ (data1 = 'RIFF') |
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RIFFReader isRIFFFile:'bitmaps/magtape.xpm' |
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RIFFReader isRIFFFile:'/phys/exept/home/pd_stuff/movies/avi/drlair.avi' |
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RIFFReader isRIFFFile: '/usr/share/sounds/alsa/test.wav' |
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RIFFReader isRIFFFile: '../../goodies/sounds/testSounds/wav/gong.wav' |
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RIFFReader isRIFFFile: '../../goodies/sounds/testSounds/aif/instr/conga_hi.aiff' |
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" |
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"Created: 4.4.1997 / 22:35:52 / cg" |
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"Modified: 5.4.1997 / 16:12:16 / cg" |
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! |
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isRIFFFile:aFileName withAnyTypeFrom:typeList |
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"return true, if aFileName contains RIFF-encoded data of format:type" |
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^ self isFile:aFileName ofType:'RIFF' withAnySubtypeFrom:typeList |
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! |
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isRIFFFile:aFileName withType:type |
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"return true, if aFileName contains RIFF-encoded data of format:type" |
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^ self isRIFFFile:aFileName withAnyTypeFrom:(Array with:type) |
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" |
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RIFFReader isRIFFFile:'bitmaps/magtape.xpm' withType:'AVI ' |
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RIFFReader isRIFFFile:'/phys/exept/home/pd_stuff/movies/avi/drlair.avi' withType:'AVI' |
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RIFFReader isRIFFFile: '/usr/share/sounds/alsa/test.wav' withType:'WAVE' |
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" |
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"Created: 4.4.1997 / 22:35:52 / cg" |
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"Modified: 5.4.1997 / 16:12:16 / cg" |
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! ! |
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!RIFFReader methodsFor:'accessing'! |
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addStream:type |
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streamTypes add:type |
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! |
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client |
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"return the value of the instance variable 'client' (automatically generated)" |
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^ client |
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! |
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client:something |
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"set the value of the instance variable 'client' (automatically generated)" |
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client := something. |
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! |
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msb |
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"return the value of the instance variable 'msb' (automatically generated)" |
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^ msb |
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! |
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msb:something |
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"set the value of the instance variable 'msb' (automatically generated)" |
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msb := something. |
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! |
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streamTypes:something |
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"set the value of the instance variable 'streamTypes' (automatically generated)" |
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streamTypes := something. |
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! ! |
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!RIFFReader methodsFor:'reading from stream'! |
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fromStream:aStream |
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"read RIFF chunks from aStream. Process chunks in getChunkXXX methods |
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(usually redefined in concrete reader classes." |
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client := self. |
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self processStream:aStream |
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" |
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RIFFReader fromFile:'/phys/exept/home/pd_stuff/movies/avi/hangldm.avi' |
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RIFFReader fromFile:'../../goodies/sounds/testSounds/wav/gong.wav' |
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AVIReader fromFile:'/phys/exept/home/pd_stuff/movies/avi/hangldm.avi' |
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WAVFileReader fromFile:'/phys/exept/opt/office52/share/gallery/sounds/gong.wav' |
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AIFFFileReader fromFile:'/phys/exept/opt/office52/share/gallery/sounds/gong.wav' |
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" |
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"Modified: 17.4.1997 / 03:25:08 / cg" |
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! |
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getChunk |
231 |
"get a single chunk" |
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232 |
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1437 | 233 |
|id sel sTyp chunkSize| |
525 | 234 |
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235 |
'getChunk -> ' infoPrint. |
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237 |
id := ' '. |
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(inStream nextBytes:4 into:id startingAt:1) ~~ 4 ifTrue:[ |
239 |
self error:'short chunk' mayProceed:true. |
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240 |
^ self |
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241 |
]. |
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chunkSize := inStream nextLongMSB:msb. |
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(id at:1) == $0 ifTrue:[ |
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sTyp := '_Unknown'. |
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streamTypes notNil ifTrue:[ |
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sTyp := streamTypes at:((id at:2) digitValue + 1) ifAbsent:nil. |
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248 |
]. |
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249 |
sel := 'getChunk_' , sTyp , '_' , (id copyFrom:3), ':'. |
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"/id infoPrint. ' -> ' infoPrint. sel infoPrintCR. |
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sel := sel asSymbolIfInterned. |
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(sel isNil or:[(client respondsTo:sel) not and:[(self respondsTo:sel) not]]) ifTrue:[ |
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254 |
sel := 'getChunk_' , sTyp , '_Unknown:'. |
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"/' ' infoPrint. id infoPrint. ' -> ' infoPrint. sel infoPrintCR. |
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sel := sel asSymbolIfInterned. |
1437 | 257 |
(sel isNil or:[(client respondsTo:sel) not and:[(self respondsTo:sel) not]]) ifTrue:[ |
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'[' infoPrint. ('getChunk_' , sTyp , '_' , (id copyFrom:3)) infoPrint. '] ' infoPrint. |
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259 |
sel := #'getChunk_Unknown:'. |
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"/' ' infoPrint. id infoPrint. ' -> ' infoPrint. sel infoPrintCR. |
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261 |
]. |
541 | 262 |
] |
525 | 263 |
] ifFalse:[ |
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(id at:4) == Character space ifTrue:[ |
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265 |
id := id copyTo:3 |
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266 |
]. |
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267 |
sel := ('getChunk_' , id , ':') asSymbolIfInterned. |
1437 | 268 |
(sel isNil or:[(client respondsTo:sel) not and:[(self respondsTo:sel) not]]) ifTrue:[ |
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269 |
'[' infoPrint. ('getChunk_' , id) infoPrint. '] ' infoPrint. |
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270 |
sel := #'getChunk_Unknown:' |
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271 |
]. |
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272 |
"/id infoPrint. ' -> ' infoPrint. sel infoPrintCR. |
525 | 273 |
]. |
274 |
||
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client perform:sel with:chunkSize ifNotUnderstood:[self perform:sel with:chunkSize]. |
525 | 276 |
'' infoPrintCR. |
277 |
||
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278 |
" |
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279 |
RIFFReader fromFile:'/phys/exept/home/pd_stuff/movies/avi/hangldm.avi' |
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280 |
AVIReader fromFile:'/phys/exept/home/pd_stuff/movies/avi/hangldm.avi' |
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281 |
" |
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282 |
|
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283 |
"Created: 4.4.1997 / 22:50:13 / cg" |
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284 |
"Modified: 5.4.1997 / 15:47:48 / cg" |
525 | 285 |
! |
286 |
||
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287 |
getChunk_DISP:chunkSize |
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288 |
"process (ignore) a DISP chunk" |
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289 |
|
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290 |
'getChunk_DISP -> ' infoPrint. |
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291 |
|
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292 |
self skipChunk:chunkSize |
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293 |
|
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294 |
"Created: 5.4.1997 / 15:19:10 / cg" |
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295 |
! |
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296 |
|
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297 |
getChunk_JUNK:chunkSize |
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298 |
"ignore JUNK chunk" |
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299 |
|
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300 |
'getChunk_JUNK -> ' infoPrint. |
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301 |
|
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302 |
self skipChunk:chunkSize |
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303 |
! |
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304 |
|
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305 |
getChunk_LIST:chunkSize |
525 | 306 |
"process a LIST chunk" |
307 |
||
308 |
'getChunk_LIST' infoPrint. |
|
309 |
||
310 |
inStream skip:4. |
|
311 |
||
312 |
" |
|
313 |
AVIReader fromFile:'/home2/pd_stuff/movies/avi/hangldm.avi' |
|
541 | 314 |
RIFFReader fromFile:'/home2/pd_stuff/movies/avi/hangldm.avi' |
315 |
RIFFReader fromFile:'/home2/cg/AFsp-V2R0/test/audiofiles/jg00b1ss.wav' |
|
525 | 316 |
" |
317 |
||
318 |
"Created: 4.4.1997 / 23:18:33 / cg" |
|
541 | 319 |
"Modified: 17.4.1997 / 03:22:15 / cg" |
525 | 320 |
! |
321 |
||
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322 |
getChunk_RIFF:chunkSize |
525 | 323 |
"process a RIFF chunk" |
324 |
||
1446 | 325 |
'getChunk_RIFF' infoPrintCR. |
525 | 326 |
|
1437 | 327 |
fileType := (inStream next:4) asString. |
1446 | 328 |
|
329 |
'fileType -> ' infoPrint. fileType infoPrint. |
|
525 | 330 |
! |
331 |
||
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332 |
getChunk_Unknown:chunkSize |
525 | 333 |
"ignore any other chunk" |
334 |
||
335 |
'getChunk_Unknown -> ' infoPrint. |
|
336 |
||
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337 |
self skipChunk:chunkSize |
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338 |
! |
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339 |
|
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340 |
processStream:aStream |
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341 |
"read RIFF chunks from aStream. Process chunks in getChunkXXX methods |
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342 |
(usually redefined in concrete reader classes." |
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343 |
|
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344 |
inStream := aStream. |
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345 |
inStream binary. |
1451 | 346 |
msb isNil ifTrue:[ |
347 |
msb := false. |
|
348 |
]. |
|
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349 |
|
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350 |
[inStream atEnd] whileFalse:[ |
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351 |
client perform:#getChunk ifNotUnderstood:[self getChunk]. |
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352 |
]. |
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353 |
^ nil |
525 | 354 |
|
355 |
" |
|
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356 |
RIFFReader fromFile:'/home2/pd_stuff/movies/avi/hangldm.avi' |
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357 |
RIFFReader fromFile:'/home2/cg/AFsp-V2R0/test/audiofiles/jg00b1ss.wav' |
525 | 358 |
" |
359 |
||
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360 |
"Modified: 17.4.1997 / 03:25:08 / cg" |
525 | 361 |
! |
362 |
||
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363 |
skipChunk:chunkSize |
525 | 364 |
"skip a chunk" |
365 |
||
366 |
|sz| |
|
367 |
||
368 |
'skipChunk' infoPrint. |
|
369 |
||
370 |
sz := chunkSize. |
|
371 |
(sz bitTest:1) ifTrue:[ |
|
372 |
sz := sz + 1 |
|
373 |
]. |
|
374 |
||
375 |
inStream skip:sz. |
|
376 |
! ! |
|
377 |
||
378 |
!RIFFReader class methodsFor:'documentation'! |
|
379 |
||
380 |
version |
|
1452 | 381 |
^ '$Header: /cvs/stx/stx/libview2/RIFFReader.st,v 1.10 2000-12-30 21:31:41 cg Exp $' |
525 | 382 |
! ! |
383 |
RIFFReader initialize! |