author | Claus Gittinger <cg@exept.de> |
Thu, 27 Feb 2020 16:08:38 +0100 | |
changeset 4457 | 8c328436fba9 |
parent 4420 | 1ee60327c114 |
permissions | -rw-r--r-- |
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"{ Encoding: utf8 }" |
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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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"{ NameSpace: Smalltalk }" |
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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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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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||
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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, WAVFileReader, AIFFFileReader for concrete examples. |
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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 nextInt32MSB: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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" |
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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'. |
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This is usually false for RIFF (intel-LSB files), |
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but may also be true for RIFX (mororola-MSB files)" |
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^ msb |
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! |
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msb:aBoolean |
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"do not call - this should be set when a header (RIFF vs. RIFX) is read" |
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msb := aBoolean. |
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! |
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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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RIFFReader fromFile:'/Users/exept/Downloads/Accordion Harmonium 3.0/Bluesharp_BR mono 3.1.nsmp3' |
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" |
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"Modified: 17.4.1997 / 03:25:08 / cg" |
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! |
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236 |
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525 | 237 |
getChunk |
238 |
"get a single chunk" |
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239 |
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1437 | 240 |
|id sel sTyp chunkSize| |
525 | 241 |
|
242 |
'getChunk -> ' infoPrint. |
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243 |
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244 |
id := ' '. |
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1449 | 245 |
(inStream nextBytes:4 into:id startingAt:1) ~~ 4 ifTrue:[ |
246 |
self error:'short chunk' mayProceed:true. |
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247 |
^ self |
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248 |
]. |
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4413 | 249 |
chunkSize := inStream nextInt32MSB:msb. |
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(id at:1) == $0 ifTrue:[ |
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252 |
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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255 |
]. |
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256 |
sel := 'getChunk_' , sTyp , '_' , (id copyFrom:3), ':'. |
525 | 257 |
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"/id infoPrint. ' -> ' infoPrint. sel infoPrintCR. |
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259 |
sel := sel asSymbolIfInterned. |
1437 | 260 |
(sel isNil or:[(client respondsTo:sel) not and:[(self respondsTo:sel) not]]) ifTrue:[ |
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261 |
sel := 'getChunk_' , sTyp , '_Unknown:'. |
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262 |
"/' ' infoPrint. id infoPrint. ' -> ' infoPrint. sel infoPrintCR. |
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263 |
sel := sel asSymbolIfInterned. |
1437 | 264 |
(sel isNil or:[(client respondsTo:sel) not and:[(self respondsTo:sel) not]]) ifTrue:[ |
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265 |
'[' infoPrint. ('getChunk_' , sTyp , '_' , (id copyFrom:3)) infoPrint. '] ' infoPrint. |
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266 |
sel := #'getChunk_Unknown:'. |
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"/' ' infoPrint. id infoPrint. ' -> ' infoPrint. sel infoPrintCR. |
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268 |
]. |
541 | 269 |
] |
525 | 270 |
] ifFalse:[ |
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(id at:4) == Character space ifTrue:[ |
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272 |
id := id copyTo:3 |
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273 |
]. |
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274 |
sel := ('getChunk_' , id , ':') asSymbolIfInterned. |
1437 | 275 |
(sel isNil or:[(client respondsTo:sel) not and:[(self respondsTo:sel) not]]) ifTrue:[ |
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276 |
'[' infoPrint. ('getChunk_' , id) infoPrint. '] ' infoPrint. |
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277 |
sel := #'getChunk_Unknown:' |
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278 |
]. |
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279 |
"/id infoPrint. ' -> ' infoPrint. sel infoPrintCR. |
525 | 280 |
]. |
281 |
||
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282 |
client perform:sel with:chunkSize ifNotUnderstood:[self perform:sel with:chunkSize]. |
525 | 283 |
'' infoPrintCR. |
284 |
||
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285 |
" |
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286 |
RIFFReader fromFile:'/phys/exept/home/pd_stuff/movies/avi/hangldm.avi' |
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287 |
AVIReader fromFile:'/phys/exept/home/pd_stuff/movies/avi/hangldm.avi' |
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288 |
" |
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289 |
|
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290 |
"Created: 4.4.1997 / 22:50:13 / cg" |
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291 |
"Modified: 5.4.1997 / 15:47:48 / cg" |
525 | 292 |
! |
293 |
||
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294 |
getChunk_DISP:chunkSize |
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295 |
"process (ignore) a DISP chunk" |
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296 |
|
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297 |
'getChunk_DISP -> ' infoPrint. |
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298 |
|
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299 |
self skipChunk:chunkSize |
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300 |
|
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301 |
"Created: 5.4.1997 / 15:19:10 / cg" |
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302 |
! |
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|
303 |
|
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304 |
getChunk_JUNK:chunkSize |
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305 |
"ignore JUNK chunk" |
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306 |
|
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307 |
'getChunk_JUNK -> ' infoPrint. |
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308 |
|
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309 |
self skipChunk:chunkSize |
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310 |
! |
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|
311 |
|
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312 |
getChunk_LIST:chunkSize |
4420 | 313 |
"process a LIST chunk." |
314 |
||
315 |
|listID| |
|
525 | 316 |
|
317 |
'getChunk_LIST' infoPrint. |
|
318 |
||
4420 | 319 |
listID := inStream next:4. |
320 |
self startList:listID. |
|
525 | 321 |
|
322 |
" |
|
323 |
AVIReader fromFile:'/home2/pd_stuff/movies/avi/hangldm.avi' |
|
541 | 324 |
RIFFReader fromFile:'/home2/pd_stuff/movies/avi/hangldm.avi' |
325 |
RIFFReader fromFile:'/home2/cg/AFsp-V2R0/test/audiofiles/jg00b1ss.wav' |
|
525 | 326 |
" |
327 |
||
328 |
"Created: 4.4.1997 / 23:18:33 / cg" |
|
541 | 329 |
"Modified: 17.4.1997 / 03:22:15 / cg" |
525 | 330 |
! |
331 |
||
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|
332 |
getChunk_RIFF:chunkSize |
525 | 333 |
"process a RIFF chunk" |
334 |
||
1446 | 335 |
'getChunk_RIFF' infoPrintCR. |
525 | 336 |
|
1437 | 337 |
fileType := (inStream next:4) asString. |
1446 | 338 |
|
339 |
'fileType -> ' infoPrint. fileType infoPrint. |
|
525 | 340 |
! |
341 |
||
4413 | 342 |
getChunk_RIFX:chunkSize |
343 |
"process a RIFX chunk (motorola byte order header chunk)" |
|
344 |
||
345 |
'getChunk_RIFX' infoPrintCR. |
|
346 |
||
347 |
fileType := (inStream next:4) asString. |
|
348 |
msb := true. |
|
349 |
||
350 |
'fileType -> ' infoPrint. fileType infoPrint. |
|
351 |
! |
|
352 |
||
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|
353 |
getChunk_Unknown:chunkSize |
525 | 354 |
"ignore any other chunk" |
355 |
||
356 |
'getChunk_Unknown -> ' infoPrint. |
|
357 |
||
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|
358 |
self skipChunk:chunkSize |
9675c5ea14df
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|
359 |
! |
9675c5ea14df
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changeset
|
360 |
|
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|
361 |
processStream:aStream |
9675c5ea14df
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Claus Gittinger <cg@exept.de>
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changeset
|
362 |
"read RIFF chunks from aStream. Process chunks in getChunkXXX methods |
9675c5ea14df
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|
363 |
(usually redefined in concrete reader classes." |
9675c5ea14df
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|
364 |
|
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|
365 |
inStream := aStream. |
9675c5ea14df
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|
366 |
inStream binary. |
1451 | 367 |
msb isNil ifTrue:[ |
368 |
msb := false. |
|
369 |
]. |
|
1434
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|
370 |
|
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|
371 |
[inStream atEnd] whileFalse:[ |
9675c5ea14df
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|
372 |
client perform:#getChunk ifNotUnderstood:[self getChunk]. |
9675c5ea14df
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|
373 |
]. |
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|
374 |
^ nil |
525 | 375 |
|
376 |
" |
|
1434
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|
377 |
RIFFReader fromFile:'/home2/pd_stuff/movies/avi/hangldm.avi' |
9675c5ea14df
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Claus Gittinger <cg@exept.de>
parents:
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changeset
|
378 |
RIFFReader fromFile:'/home2/cg/AFsp-V2R0/test/audiofiles/jg00b1ss.wav' |
525 | 379 |
" |
380 |
||
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|
381 |
"Modified: 17.4.1997 / 03:25:08 / cg" |
525 | 382 |
! |
383 |
||
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changeset
|
384 |
skipChunk:chunkSize |
525 | 385 |
"skip a chunk" |
386 |
||
387 |
|sz| |
|
388 |
||
389 |
'skipChunk' infoPrint. |
|
390 |
||
391 |
sz := chunkSize. |
|
392 |
(sz bitTest:1) ifTrue:[ |
|
393 |
sz := sz + 1 |
|
394 |
]. |
|
395 |
||
396 |
inStream skip:sz. |
|
4420 | 397 |
! |
398 |
||
399 |
startList:listID |
|
400 |
"ignored here. |
|
401 |
May be changed in the future to keep track of the current list" |
|
402 |
||
403 |
" |
|
404 |
AVIReader fromFile:'/home2/pd_stuff/movies/avi/hangldm.avi' |
|
405 |
RIFFReader fromFile:'/home2/pd_stuff/movies/avi/hangldm.avi' |
|
406 |
RIFFReader fromFile:'/home2/cg/AFsp-V2R0/test/audiofiles/jg00b1ss.wav' |
|
407 |
" |
|
408 |
||
409 |
"Created: 4.4.1997 / 23:18:33 / cg" |
|
410 |
"Modified: 17.4.1997 / 03:22:15 / cg" |
|
525 | 411 |
! ! |
412 |
||
413 |
!RIFFReader class methodsFor:'documentation'! |
|
414 |
||
415 |
version |
|
4413 | 416 |
^ '$Header$' |
4414 | 417 |
! |
418 |
||
419 |
version_CVS |
|
420 |
^ '$Header$' |
|
525 | 421 |
! ! |
4413 | 422 |
|
423 |
||
525 | 424 |
RIFFReader initialize! |