109 lines
2.9 KiB
Smalltalk
109 lines
2.9 KiB
Smalltalk
"
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Simple UDP replay from the state files
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"
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PackageLoader fileInPackage: #Sockets.
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Object subclass: SDPUtils [
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"Look into using PetitParser."
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SDPUtils class >> findPort: aSDP [
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aSDP linesDo: [:line |
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(line startsWith: 'm=audio ') ifTrue: [
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| stream |
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stream := line readStream
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skip: 'm=audio ' size;
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yourself.
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^ Number readFrom: stream.
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]
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].
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^ self error: 'Not found'.
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]
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SDPUtils class >> findHost: aSDP [
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aSDP linesDo: [:line |
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(line startsWith: 'c=IN IP4 ') ifTrue: [
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| stream |
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^ stream := line readStream
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skip: 'c=IN IP4 ' size;
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upToEnd.
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]
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].
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^ self error: 'Not found'.
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]
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]
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Object subclass: RTPReplay [
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| filename socket |
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RTPReplay class >> on: aFile [
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^ self new
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initialize;
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file: aFile; yourself
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]
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initialize [
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socket := Sockets.DatagramSocket new.
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]
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file: aFile [
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filename := aFile
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]
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localPort [
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^ socket port
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]
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streamAudio: aHost port: aPort [
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| file last_time last_image udp_send dest |
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last_time := nil.
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last_image := nil.
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file := FileStream open: filename.
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"Send the payload"
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dest := Sockets.SocketAddress byName: aHost.
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udp_send := [:payload | | datagram |
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datagram := Sockets.Datagram data: payload contents address: dest port: aPort.
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socket nextPut: datagram
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].
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[file atEnd] whileFalse: [
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| lineStream time data now_image |
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lineStream := file nextLine readStream.
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"Read the time, skip the blank, parse the data"
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time := Number readFrom: lineStream.
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lineStream skip: 1.
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data := WriteStream on: (ByteArray new: 30).
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[lineStream atEnd] whileFalse: [
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| hex |
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hex := lineStream next: 2.
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data nextPut: (Number readFrom: hex readStream radix: 16).
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].
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last_time isNil
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ifTrue: [
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"First time, send it right now"
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last_time := time.
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last_image := Time millisecondClockValue.
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udp_send value: data.
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]
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ifFalse: [
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| wait_image new_image_time |
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"How long to wait?"
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wait_image := last_image + ((time - last_time) * 1000).
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[ wait_image > Time millisecondClockValue ]
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whileTrue: [Processor yield].
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udp_send value: data.
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last_time := time.
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last_image := wait_image.
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]
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]
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]
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]
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