[Indigo]<Voice>Thrush>LarkSmartsSupImpl.mesa!47

LarkSmartsSupImpl.mesa

Last modified by D. Swinehart, June 1, 1986 7:49:57 pm PDT

Polle Zellweger (PTZ) August 27, 1985 9:07:50 pm PDT

DIRECTORY

Atom USING [ DottedPairNode, GetPName ],

Commander USING [ CommandProc, Register ],

Convert USING [ CardFromRope ],

IO,

LarkPlay USING [ MergeToneSpecs, PlayString, ToneSpec, ToneSpecRec ],

LarkSmartsMonitorImpl,

MBQueue USING [ QueueClientAction ],

NamesGV USING [ GVGetAttribute ],

Nice,

RefID USING [ ID, Reseal, Unseal ],

RefTab USING [ Create, Fetch, Ref, Store ],

Rope USING [ Concat, ROPE ],

ThNet USING [ pd ],

ThParty USING [ Advance, ConversationInfo, DescribeParty, GetConversationInfo, GetKeyTable, GetPartyInfo, PartyInfo ],

ThPartyPrivate USING [ GetCurrentParty ],

Thrush USING [
ActionReport, ConvEvent, ConversationID, PartyID, PartyType, NB, notReallyInConv, nullConvID, nullID, Reason, ROPE, SHHH, SmartsID, StateID, StateInConv ],

ThSmartsPrivate USING [

ConvDesc, ConvDescBody, ConvRequest, ConvRequestBody, EnterLarkState, LarkState, OpenConversations, ParseState, SmartsInfo ],

ThSmartsRpcControl,

Triples USING [ Select ],

TU,

VoiceUtils USING [ MakeAtom, ProblemFR, Report, ReportFR ]

;

LarkSmartsSupImpl: CEDAR MONITOR LOCKS root

IMPORTS

Atom,

Commander,

Convert,

IO,

LarkPlay,

root: LarkSmartsMonitorImpl,

MBQueue,

NamesGV,

Nice,

RefID,

RefTab,

Rope,

ThNet,

ThParty,

ThPartyPrivate,

ThSmartsPrivate,

Triples,

TU,

VoiceUtils

EXPORTS ThSmartsPrivate

SHARES LarkSmartsMonitorImpl = {

OPEN IO;

Definitions

ConversationID: TYPE = Thrush.ConversationID;

nullConvID: ConversationID=Thrush.nullConvID;

ConvDesc: TYPE = ThSmartsPrivate.ConvDesc;

ConvEvent: TYPE = Thrush.ConvEvent;

Reseal: PROC[r: REF] RETURNS[RefID.ID] = INLINE {RETURN[RefID.Reseal[r]]; };

NB: TYPE = Thrush.NB;

OpenConversations: TYPE = ThSmartsPrivate.OpenConversations;

PartyID: TYPE = Thrush.PartyID;

nullID: RefID.ID = Thrush.nullID;

ROPE: TYPE = Thrush.ROPE;

SmartsID: TYPE = Thrush.SmartsID;

SmartsInfo: TYPE = ThSmartsPrivate.SmartsInfo;

StateInConv: TYPE = Thrush.StateInConv;

LORA: TYPE = LIST OF REF ANY;

PD: TYPE = RECORD [

timeoutNoAction: INTEGER ← 5,

doReports: BOOL←FALSE,

larkRegistry: ROPE ← ".lark",

doNice: BOOL←FALSE

];

pd: REF PD ← NEW[PD←[]];

Party-invoked actions

LarkProgress: PUBLIC ENTRY PROC[

interface: ThSmartsRpcControl.InterfaceRecord,

shh: Thrush.SHHH,

convEvent: Thrush.ConvEvent

] = {

ENABLE UNWIND => NULL; -- RestoreInvariant;

Some party has changed state in a conversation we know about.

Three cases:

Another smarts initiated a state change for this party, and we're not receptive.

(For now, when we don't know about that conversation and already in another)

Another smarts initiated a change for this party, and we're receptive.

(New conversation and we're idle or a conversation we're in already)

Another party changed state in a conversation we know about.

convID: ConversationID = convEvent.self.convID;

info: SmartsInfo = GetSmartsInfo[smartsID: convEvent.self.smartsID];

cDesc: ConvDesc;

whatNeedsDoing: WhatNeedsDoing;

IF info=NIL THEN { Report["No info at Progress", NIL]; RETURN; };

cDesc ← GetConv[ info, convID, TRUE ];

IF convEvent.self.partyID = convEvent.other.partyID THEN { -- own state changed

NoteNewState[cDesc, convEvent];

SELECT info.currentConvID FROM

convID, nullConvID => NULL;

(new conversation and we're idle) or (this is the one we like)

ENDCASE => DoRejectCall[cDesc, convEvent];

We have to reject this, since we're already dealing with another conv.

We are (still) willing to seriously consider only one conversation at a time.

RETURN;

};

IF convID#info.currentConvID THEN {

Situation is that someone else reported a change of theirs concerning a conversation we've expressed no interest in. I don't believe this should happen.

Report["Strange progress report", cDesc.info];

ForgetConv[cDesc];

RETURN;

};

Someone else's state changed in a conv. we're interested in; see if it means anything to us!

whatNeedsDoing ← whatNeedsDoingIf[cDesc.situation.self.state][convEvent.other.state];

SELECT whatNeedsDoing FROM

$noop, $ntiy => NULL; -- No action is needed, or we don't know what one to take.

$imp => ERROR; -- This is supposed to be impossible!

$xrep => Report["Didn't expect state change report", info];

We don't expect reports of state changes like $notified and $ringback to be reported to us unless it's us.

$frgt => ForgetConv[cDesc];

We were told something about a conversation we didn't particularly care to know about. Forget it.

$invl => {

We don't know a valid interpretation of this transition on someone else's part when we're in the state we're in.

Report["Invalid state transition", info];

[]𡤌hangeState[cDesc: cDesc, state: $failed,

reason: $error, comment: "System Error: Invalid state transition"];

};

$idle => {

If everybody else is gone, go too. I'm sure I've got the dial-tone stuff messed up.

nb2: NB;

reason: Thrush.Reason;

cInfo: ThParty.ConversationInfo;

[nb2, cInfo] ← ThParty.GetConversationInfo[convID: convEvent.self.convID];

reason ← IF nb2 # $success THEN $error ELSE convEvent.reason;

IF nb2 # $success OR (cInfo.numParties-cInfo.numIdle) <= 1 THEN

[]𡤌hangeState[cDesc, IF reason=$terminating THEN $idle ELSE $failed, reason];

};

$rback => []𡤌hangeState[cDesc, $ringback]; -- Provide ring-back signal

$actv => []𡤌hangeState[cDesc, $active]; -- Go active

$reac => NULL; -- Will be used to reactivate when somebody else leaves inactive

$deac => NULL; -- Will be used to deactivate when everybody else leaves active;

ENDCASE => ERROR;

};

LarkSubstitution: PUBLIC ENTRY PROC[

interface: ThSmartsRpcControl.InterfaceRecord,

shh: Thrush.SHHH,

convEvent: Thrush.ConvEvent,

oldPartyID: Thrush.PartyID,

newPartyID: Thrush.PartyID

] = {

ENABLE UNWIND => NULL; -- RestoreInvariant;

A poacher has substituted for a poachee, or the other way around. Update state so that if it's us, we know who we are.

No conversation state has changed, so just update our notion of our state and quit.

info: SmartsInfo = GetSmartsInfo[smartsID: convEvent.self.smartsID];

cDesc: ConvDesc;

IF info=NIL THEN { Report["No info at Substitution", NIL]; RETURN; };

cDesc ← GetConv[ info, convEvent.self.convID, FALSE ];

IF cDesc=NIL THEN RETURN;

NoteNewState[cDesc, convEvent];

};

LarkReportAction: PUBLIC ENTRY PROC[

interface: ThSmartsRpcControl.InterfaceRecord,

shh: Thrush.SHHH,

report: Thrush.ActionReport

] = { shh ← shh; shh ← shh; }; -- a Place to stand.

Queued procedures — via request or party->smarts report

All have prefix "Qd" (queued request)

The only ones left are those that avoid recursive calls on ThParty.Advance and on NoteNewState. Even those could probably be eliminated with a bit more thought. Like maybe Loop with the resulting ConvEvent.

QdNotification: ENTRY PROC [r: REF] ~ {

We have been invited to join a conversation, and we were not otherwise occupied. Decide how to deal with it. r is the updated cDesc

ENABLE UNWIND => NULL; -- RestoreInvariant;

cDesc: ConvDesc = NARROW[r];

{

OPEN now: cDesc.situation.self;

The only question is whether to ring or to accept right away.

IF now.state # $notified THEN RETURN; -- Nothing to do any more??

[]𡤌hangeState[cDesc,

IF VoiceUtils.MakeAtom[DBInfo[now.partyID, $autoanswer].value] = $true THEN $active

ELSE $ringing];

};

Action procedures: change state, queue up interval request, and so on.

All have prefix "Do"

DoAdvance: INTERNAL PROC[convRequest: ThSmartsPrivate.ConvRequest]

RETURNS [nb: NB] = {

cDesc: ConvDesc = convRequest.cDesc;

DO -- for possible stateMismatch loop

OPEN now: cDesc.situation.self, desired: convRequest.desiredSituation.self;

convEvent: Thrush.ConvEvent;

IF now.state=$idle OR now.state = desired.state THEN RETURN;

More comfortable if this were a complete check for reasonable transitions. For now, if the initial request wasn't a transition to $idle and we got a state mismatch, we've given up, assuming that what our other smarts did was as reasonable as what we wanted to do. Later queued actions, and later actions in LarkSmartsImpl (synchronous with user actions) will have to detect any anomalies and deal with them.

[nb, convEvent] ← ThParty.Advance[

credentials: now,

state: desired.state,

reason: convRequest.desiredSituation.reason,

comment: convRequest.desiredSituation.comment,

reportToAll: shouldReportToAll[desired.state]

];

SELECT nb FROM

$success => cDesc.info.NoteNewStateP[cDesc, convEvent];

$stateMismatch => {

We and some other smarts acting on our behalf requested something at the same time. The other one won. If we were trying to hang up, we must persist. Otherwise, assume the winner was right.

cDesc.info.NoteNewStateP[cDesc, convEvent];

IF desired.state = $idle THEN LOOP;

};

$noSuchConv => Report["Conv doesn't exist at Advance", cDesc.info];

Unusual, but possible if idle report took a real long time to get here.

$partyAlreadyActive => NULL; -- Deal with $canActivate here some time

ENDCASE => AssessDamage[nb, cDesc, convEvent];

EXIT; ENDLOOP;

};

DoRejectCall: INTERNAL PROC[cDesc: ConvDesc, convEvent: ConvEvent] = {

[]𡤌hangeState[cDesc, $idle, $busy];

};

Update procedures: record state changes, take local actions based on what they are, and so on.

All Update procedures have prefix "Note". These procedures should never result directly in another ThParty request, to avoid uncontrolled recursions. (It might be necessary for them to queue another -- thinking particularly of the "going idle" case.)

NoteNewState: PUBLIC INTERNAL PROC[cDesc: ConvDesc, convEvent: ConvEvent] ~ {

OPEN now: cDesc.situation.self;

nb: NB;

larkStateData: LORA ←NIL;

state: StateInConv ← convEvent.self.state;

previousState: StateInConv = cDesc.situation.self.state;

savedCurrentConvID: ConversationID;

cDesc hasn't been updated with convEvent, yet, so comparisons of previous and current state are possible here if desirable.

cDesc.situation ← convEvent^;

IF state = previousState THEN RETURN; -- No conceivable value in acting.

IF cDesc.info.currentConvID=nullConvID THEN

cDesc.info.currentConvID ← cDesc.situation.self.convID;

savedCurrentConvID ← cDesc.info.currentConvID; -- ForgetConv might clear it.

SELECT state FROM

$notified => { -- Somebody else did the notifying. We have to respond.

This is the only time a change in our own state has to be reacted to? Still queued up because otherwise the state-management is confusing.

cDesc.info.requests.QueueClientAction[QdNotification, cDesc];

};

$ringing, $ringback => larkStateData ← LIST[SetupRingTunes[cDesc]];

$idle, $neverWas => {

If off-hook or speakerphone on, schedule a new dial-tone? I'm sure there's not enough info around to know why the other party quit, at this time.

ForgetConv[cDesc];

};

$active => {

value: ROPE; dbAtom: ATOM;

larkStateData ← LIST[ComputeConnection[cDesc]];

[, dbAtom, value] ← DBInfo[now.partyID, $audiosource];

larkStateData ← CONS[NEW[Atom.DottedPairNode←[$audioSource, VoiceUtils.MakeAtom[value]]], larkStateData]; --[[$audioSource,audioSource],...]

value ← DBInfo[now.partyID, $transmitonly, dbAtom].value;

larkStateData ← CONS[NEW[Atom.DottedPairNode←[$transmitOnly, VoiceUtils.MakeAtom[value]]], larkStateData];

};

ENDCASE;

IF state > Thrush.notReallyInConv AND cDesc.keyTable=NIL THEN {

Earliest opportunity to get keys

[nb, cDesc.keyTable] ← ThParty.GetKeyTable[credentials: now];

IF nb # $success THEN cDesc.keyTable←NIL;

};

IF state> Thrush.notReallyInConv AND cDesc.keyTable#cDesc.info.larkInfo.keyTable AND cDesc.keyTable#NIL THEN larkStateData ← CONS[cDesc.keyTable, larkStateData];

IF now.convID = savedCurrentConvID THEN SetLarkState[cDesc, larkStateData];

The test prevents changes in lark state for a conversation that we're participating in but don't have the voice terminal connected to.

};

AssessDamage: PUBLIC INTERNAL PROC [nb: NB, cDesc: ConvDesc, convEvent: ConvEvent] ~ {

nb # $success after a call to ThParty. It was also not one of the failures that one expects in normal discourse. Decide how bad it is.

SELECT nb FROM

};

Connection Management Utilities

ChangeState: PUBLIC INTERNAL PROC[

cDesc: ConvDesc,

state: StateInConv ← idle,

reason: Thrush.Reason ← NIL, -- $wontSay

comment: ROPE←NIL

] RETURNS [nb: NB] = {

convRequest: ThSmartsPrivate.ConvRequest;

IF cDesc = NIL THEN RETURN;

convRequest ← NEW[ThSmartsPrivate.ConvRequestBody ← [cDesc: cDesc]];

convRequest.desiredSituation.self.state ← state;

convRequest.desiredSituation.reason ← reason;

convRequest.desiredSituation.comment ← comment;

nb ← DoAdvance[convRequest];

};

GetConv: PUBLIC INTERNAL PROC[info: SmartsInfo, convID: ConversationID, createOK: BOOL�LSE

] RETURNS [ cDesc: ConvDesc←NIL ] = --INLINE-- {

FOR convs: OpenConversations ← info.conversations, convs.rest WHILE convs#NIL DO

IF convs.first.situation.self.convID = convID THEN RETURN[convs.first];

ENDLOOP;

IF ~createOK THEN RETURN;

cDesc ← NEW[ThSmartsPrivate.ConvDescBody←[]];

cDesc.situation.self ← [ convID: convID, smartsID: info.smartsID,

partyID: ThPartyPrivate.GetCurrentParty[smartsID: info.smartsID].partyID ]; -- nb check?

cDesc.info ← info;

info.conversations ← CONS[cDesc, info.conversations];

IF pd.doReports THEN

ReportFR[" ** NewConv %t %g\n", info, time[convID], TU.RefAddr[info] ];

};

ForgetConv: PUBLIC INTERNAL PROC[cDesc: ConvDesc] = {

Just remove its cDesc from info.conversations; also clear info.currentConvID if it's us.

info: SmartsInfo = cDesc.info;

prev: OpenConversations←NIL;

IF cDesc.situation.self.convID = info.currentConvID THEN info.currentConvID ← nullConvID;

FOR convs: OpenConversations ← info.conversations, convs.rest WHILE convs#NIL DO

IF convs.first # cDesc THEN { prev𡤌onvs; LOOP; };

IF prev#NIL THEN prev.rest ← convs.rest ELSE info.conversations ← convs.rest;

RETURN;

ENDLOOP;

};

ComputeConnection: PUBLIC INTERNAL PROC[cDesc: ConvDesc]

RETURNS [pInfo: ThParty.PartyInfo ← NIL] = {

Socket assignment: Each transmitting host gets an assigned socket (ThParty makes them) and ThParty.GetConversationInfo returns a list of them (self first). One transmits voice to a socket comprised of the other host's address combined with one's OWN socket number. In a conference, the other host is the multicast host. One listens to some number of sockets, comprised of the other host's (or multicast) address, and their own socket numbers. This makes the multicast case consistent.

A ConnectionSpec, when sent to the lark, includes:

buffer: {in1, in2, out1, out2, out3}. A buffer to which analog-to-ethernet (ini, corresponding to txi) or ethernet-to-analog (outj, corresponding to rxj) samples for this connection will be queued. When running the standard program O3I1 (1 in, 3 out) only in1 can be used, and any ethernet-to-analog connection can be assigned to any of the outj buffers. This is the conference mode. When running O2I2 (2 in, 2 out), in1 and out1 are paired, as are in2 and out2; out3 is not used. This is the "simultaneous back door and front door call" mode.

localSocket: for ini (txi) buffers, this is ignored by the Lark Pup code. For outj (rxj) buffers, this specifies the socket on which to listen -- see above.

remoteSocket: ignored for outj (rxj) buffers. For in1 (tx1) buffers, specifies the socket to send to.

This call now simply gets the PartyInfo from ThParty; LarkOutImpl produces the actual connection specs and sends them on to the lark.

nb: NB;

[nb, pInfo] ←

ThParty.GetPartyInfo[credentials: cDesc.situation.self, nameReq: $none, allParties: TRUE];

IF nb # $success OR pInfo[0].partyID=0 THEN {

Problem["No conversation info, or incomplete", cDesc.info]; pInfo←NIL; RETURN; }; -- This is really bad!

};

Other Utilities

GetSmartsInfo: PUBLIC PROC[smartsID: SmartsID] RETURNS [info: SmartsInfo←NIL] = {

sd: REF ← RefID.Unseal[smartsID];

IF sd#NIL THEN RETURN[NARROW[Triples.Select[$SmartsData, sd, --info--]]];

};

DBInfo: PUBLIC PROC[partyID: Thrush.PartyID, attribute: ATOM←NIL, prevDbAtom: ATOM←NIL]

RETURNS [dbRname: ROPE←NIL, dbAtom: ATOM←NIL, value: ROPE←NIL] = {

nb: NB ← $success;

rName: ROPE;

dbAtom ← prevDbAtom;

IF dbAtom#NIL THEN rName ← Atom.GetPName[dbAtom]

ELSE IF partyID#nullID THEN

[nb, rName] ← ThParty.DescribeParty[partyID: partyID, nameReq: $current];

IF nb # $success OR rName=NIL THEN RETURN;

dbRname ← rName.Concat[pd.larkRegistry];

IF dbAtom=NIL THEN dbAtom ← VoiceUtils.MakeAtom[rName: rName, case: FALSE];

IF attribute#NIL THEN value ← NamesGV.GVGetAttribute[dbRname, attribute, NIL];

};

Problem: PROC[comment: ROPE, info: SmartsInfo] = {

VoiceUtils.ProblemFR[Rope.Concat["LarkSmarts(%g): ", comment], $Smarts, info, TU.RefAddr[info]];

};

Report: PROC[what: ROPE, info: SmartsInfo] = {

IF NOT pd.doReports THEN RETURN;

VoiceUtils.Report[what, $Lark, info.larkInfo];

};

ReportFR: PROC[what: ROPE, info: SmartsInfo, a1, a2, a3: IO.Value←rope[NIL]] = {

IF NOT pd.doReports THEN RETURN;

VoiceUtils.ReportFR[what, $Lark, info.larkInfo, a1, a2, a3];

};

BeNice: PROC[r: REF, d: INT, info: SmartsInfo] = {

IF NOT pd.doNice THEN RETURN;

Nice.BeNice[r, d, $Lark, info.larkInfo];

};

Ring Tune Stuff — but for GFI's, would move to another file.

ringTunes: RefTab.Ref←RefTab.Create[59];

ringTone: LarkPlay.ToneSpec ← NIL;

subduedRingTone: LarkPlay.ToneSpec ← NIL;

outsideRingTone: LarkPlay.ToneSpec ← NIL;

outsideRingTune: PUBLIC LarkPlay.ToneSpec ← NIL;

outsideRingTuneRope: ROPE ← "@300;G%>G<%G%>G<%G%>G<%G%>G<%G%>*C";

ringTuneDelay: NAT ← 2400; -- ms. delay between tune starts.

SetupRingTunes: PROC[cDesc: ConvDesc] RETURNS [toneSpec: LarkPlay.ToneSpec] = {

OPEN self: cDesc.situation.self;

partyID: Thrush.PartyID = self.partyID;

dbName: ROPE = DBInfo[partyID].dbRname;

otherPartyID: Thrush.PartyID←nullID;

otherDbName: ROPE;

otherTune: LarkPlay.ToneSpec←NIL;

otherType: Thrush.PartyType;

defaultSpec: LarkPlay.ToneSpec; -- outside or inside ringing

nb: NB;

pInfo: ThParty.PartyInfo;

divisor: NAT ← 1;

rope: ROPE;

now: BasicTime.GMT = BasicTime.Now[];

expiration: BasicTime.GMT ← now;

ringMode: ATOM;

ringDo: ATOM;

[nb, pInfo] ←

ThParty.GetPartyInfo[credentials: [convID: self.convID, partyID: partyID], allParties: TRUE, nameReq: $none];

IF pInfo.numParties=2 THEN {

Doesn't handle conference situations: look for a party in ringing or ringBack state!

otherPartyID ← pInfo[1].partyID;

otherType ← pInfo[1].type;

otherDbName← DBInfo[otherPartyID].dbRname;

};

IF ThNet.pd.ringsInvalid THEN MakeDefaultRingTunes[];

SELECT self.state FROM

$ringback => {

toneSpec ← GetRingTune[otherPartyID];

IF toneSpec=NIL THEN RETURN;

toneSpec ← NEW[LarkPlay.ToneSpecRec ← toneSpec^];

toneSpec.volume ← ThNet.pd.tonesVolume+2;

toneSpec.repeatIndefinitely ← TRUE;

RETURN;

};

$ringing => NULL; -- main case continues below

ENDCASE => RETURN; -- what are we doing here anyhow?

We are being called. Figure out how to respond.

If there's an expiration for a temporary ringing mode, and it hasn't expired yet, use it. If there isn't one or it has expired, use the permanent ringing mode.

defaultSpec ← SELECT otherType FROM $trunk => outsideRingTone, ENDCASE => ringTone;

rope ← NamesGV.GVGetAttribute[dbName, $expiration, NIL];

IF rope#NIL THEN expiration ← BasicTime.FromNSTime[Convert.CardFromRope[rope]];

rope ← NamesGV.GVGetAttribute[dbName,

IF BasicTime.Period[from: now, to: expiration] > 0 THEN $timedringmode ELSE $ringmode, NIL];

ringMode ← IF rope=NIL THEN $r ELSE VoiceUtils.MakeAtom[rName: rope, case: FALSE];

SELECT ringMode FROM -- $o, $s, $r

$o => RETURN[NIL];

$s => RETURN[subduedRingTone];

$r => NULL; -- largest case continues below

ENDCASE => RETURN[defaultSpec]; -- unknown case; act vanilla

We're ringing. Figure out how to do it.

rope ← NamesGV.GVGetAttribute[dbName, $dotune, NIL];

ringDo ← IF rope=NIL THEN $standard ELSE VoiceUtils.MakeAtom[rName: rope, case: FALSE];

SELECT ringDo FROM

$false, $standard => RETURN[defaultSpec];

$both => {

SELECT otherType FROM

$individual, $telephone => {

divisor ← 2;

rope ← NamesGV.GVGetAttribute[otherDbName, $dotune, NIL];

ringDo ← IF rope=NIL THEN $standard ELSE VoiceUtils.MakeAtom[rName: rope, case: FALSE];

IF ringDo=$both THEN otherTune ← GetRingTune[otherPartyID];

This produces a second ring tune, compatible with the callee's; they will be played together.

};

$trunk => otherTune ← outsideRingTune;

ENDCASE;

};

$true, $tune => NULL; -- continue below

ENDCASE => RETURN[defaultSpec];

toneSpec ← GetRingTune[partyID];

IF toneSpec=NIL THEN RETURN[defaultSpec];

IF otherTune#NIL THEN toneSpec ← LarkPlay.MergeToneSpecs[toneSpec, otherTune, divisor, ringTuneDelay];

};

GetRingTune: PROC[party: PartyID] RETURNS [ringTune: LarkPlay.ToneSpec←NIL] = {

Returns the ring tune, if any, associated with the party. If the caller wants to change anything, it must copy the results, since GetRingTune doesn't.

nameAtom: ATOM;

name: ROPE;

ringTuneRope: ROPE;

IF party = nullID THEN RETURN;

[name, nameAtom, ringTuneRope] ← DBInfo[party, $ringtune];

IF ringTuneRope=NIL THEN RETURN;

ringTune ← NARROW[ringTunes.Fetch[nameAtom].val];

IF ringTune#NIL AND ringTune.asRope=ringTuneRope THEN RETURN;

ringTune ← LarkPlay.PlayString[music: ringTuneRope, file: FALSE, volume: ThNet.pd.defaultRingVolume];

[]←ringTunes.Store[nameAtom, ringTune]

};

MakeDefaultRingTunes: PROC = {

ringTone ← NEW[LarkPlay.ToneSpecRec ← [

repeatIndefinitely: TRUE, volume: ThNet.pd.defaultRingVolume,

tones: LIST[LIST[ [f1: 440, f2: 480, on: 2000, off: 4000],

[f1: 440, f2: 480, on: 2000, off: 4000]]]]];

outsideRingTone ← NEW[LarkPlay.ToneSpecRec ← [

repeatIndefinitely: TRUE, volume: ThNet.pd.defaultRingVolume,

tones: LIST[LIST[ [f1: 440, f2: 480, on: 500, off: 500],

[f1: 440, f2: 480, on: 500, off: 4500]]]]];

subduedRingTone ← NEW[LarkPlay.ToneSpecRec ← [

repeatIndefinitely: FALSE,

volume: ThNet.pd.defaultRingVolume+ThNet.pd.subduedVolumeInterval,

tones: LIST[LIST[[f1: 440, f2: 480, on: 500, off: 0]]]

]];

outsideRingTune ←

LarkPlay.PlayString[outsideRingTuneRope, FALSE, ThNet.pd.defaultRingVolume];

ThNet.pd.ringsInvalid ← FALSE;

};

State Transition Tables

larkStateForState: ARRAY StateInConv OF ThSmartsPrivate.LarkState ← [

neverWas, idle, failed, reserved, parsing, initiating, pending, maybe, ringing,

silence, idle, errorTone, dialTone, silence, silence, silence, ringBack, ringing,

canActivate, active, inActive

silence, talking, silence

];

SetLarkState: INTERNAL PROC[cDesc: ConvDesc, data: LORA ] = {

larkState: ThSmartsPrivate.LarkState ← larkStateForState[cDesc.situation.self.state];

SELECT larkState FROM

$talking => {

If connection is to the back door on the same machine, Trunk smarts has already set state to trunkTalking, or is about to. Don't change it.

spec: ThParty.PartyInfo;

FOR dL: LORA ← data, dL.rest WHILE dL#NIL DO WITH dL.first SELECT FROM

pI: ThParty.PartyInfo => spec ← pI;

ENDCASE; ENDLOOP;

IF spec=NIL THEN ERROR;

IF spec.numParties=2 AND spec[0].socket.host = spec[1].socket.host THEN

See the discussion of sockets — they'll be equal only when sender and receiver is same host. We're disallowing conferences in this case.

larkState ← cDesc.info.larkInfo.larkState; -- don't change

};

$errorTone => larkState ← SELECT cDesc.situation.reason FROM

$busy, $notImportantEnough => $busyTone,

$absent, $noCircuits, $noParticular, $notFound, $error => $errorTone,

ENDCASE => $errorTone;

ENDCASE;

ThSmartsPrivate.EnterLarkState[cDesc.info.larkInfo, larkState, data];

};

Should we report this transition to everyone, or just to our own smartses?

shouldReportToAll: ARRAY StateInConv OF BOOL = [

never idle error reserved parsing init notified ringback ringing canAc active inactive

FALSE, TRUE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE, TRUE, TRUE, TRUE ];

WhatNeedsDoing: TYPE = ATOM; -- {

Just codes to dispatch on in Supervisor; explained there

$noop, $idle, $actv, $rback, $reac, $deac, $frgt, -- cases explained in code

$invl, -- considered an invalid request

$xrep, -- we got a report we feel we shouldn't have got

$ntiy, -- not implemented yet

$imp -- this situation should not arise even in the face of invalid requests

};

whatNeedsDoingIf: ARRAY StateInConv OF ARRAY StateInConv OF WhatNeedsDoing ← [

If we're in the state identified by the row, and someone else in the conversation reports a transition onto the state identified by the column, what should we do?

never idle failed resrv pars init notif rback ring canAc activ inact -- ← (other)

[ $imp, $frgt, $frgt, $frgt, $frgt, $frgt, $frgt, $frgt, $frgt, $frgt, $frgt, $frgt], --neverWas

(Clip this table to view without these comments.)

This situation arises when we've forgotten about the conversation that somebody else is still reporting on.

[ $imp, $noop, $noop, $noop, $noop, $noop, $noop, $noop, $noop, $noop, $noop, $ntiy ], -- idle

[ $imp, $noop, $noop, $noop, $noop, $noop, $noop, $noop, $noop, $noop, $noop, $ntiy ], -- failed

[ $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp ], -- reserved

The actions of other parties are not of interest to us yet, since they're not in this conv.

[ $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp, $imp ], -- parsing

Ditto.

[ $imp, $idle,$noop, $invl, $invl, $invl, $xrep, $xrep,$rback,$actv, $actv, $actv ], -- initiating

They can either enter ringing to indicate interest, or go active without ringing

[ $imp, $idle,$noop, $invl, $invl, $invl, $xrep, $noop, $noop, $ntiy, $noop, $ntiy ], -- notified

We don't expect to hear from others while we're deciding whether to play

[ $imp, $idle,$noop,$invl, $invl, $invl, $noop, $xrep, $noop, $ntiy, $actv, $ntiy ], -- ringback

They have earlier expressed interest noopringing), and are now joining the fray

[ $imp, $idle,$noop, $invl, $invl, $invl, $xrep, $xrep, $noop, $ntiy, $noop, $ntiy ], -- ringing

The only thing that interests us here is everybody else quitting.

[ $imp, $idle,$noop, $invl, $invl, $invl, $xrep, $xrep, $noop, $ntiy, $noop, $ntiy ], -- canActivate

[ $imp, $idle,$noop, $invl, $invl, $invl, $xrep, $xrep, $noop, $ntiy, $reac, $deac ], -- active

[ $imp, $idle,$invl, $invl, $invl, $invl, $xrep, $xrep, $noop, $ntiy, $ntiy, $ntiy ] -- inactive (current ^)

];

Debugging nonsense

ViewCmd: Commander.CommandProc = TRUSTED {

Nice.View[pd, "Lark PD"];

};

Commander.Register["VuLarkSmarts", ViewCmd, "Program Management variables for Lark Smarts"];

Swinehart, May 15, 1985 11:05:22 am PDT

Cedar 6.0, add Prose stuff as direct copy of Interval stuff.

changes to: IntervalSpecs, ProseSpec, ProseSpecs, LarkState, LarkProgress, LarkSupervise, EnqueueProses

Swinehart, May 22, 1985 12:15:11 pm PDT

hotLine => autoAnswer

changes to: LarkSupervise

Swinehart, July 2, 1985 10:09:14 am PDT

Fixing up trunkTalking stuff

changes to: LarkSupervise, LarkStateForState

Polle Zellweger (PTZ) July 11, 1985 6:15:01 pm PDT

changes to: DIRECTORY, EnqueueProses, ReportProseDone, LarkSupervise

Polle Zellweger (PTZ) July 16, 1985 9:42:51 pm PDT

changes to: LarkProgress, LarkSupervise, ReportProseDone

Polle Zellweger (PTZ) July 30, 1985 4:41:39 pm PDT

Handle copying of newProses correctly - give Lark its own copy.

changes to: LarkSupervise

Swinehart, August 6, 1985 2:26:39 pm PDT

Merge PTZ ProseSpec changes

changes to: DIRECTORY, LarkProgress, LarkSupervise, EnqueueProses

Polle Zellweger (PTZ) August 14, 1985 6:12:13 pm PDT

Prose flushing, also fix undesired speakerphone hangup for intervals, proseSpecs.

changes to: LarkProgress, LarkSupervise

Polle Zellweger (PTZ) August 22, 1985 2:04:45 pm PDT

changes to: LarkProgress -- comment out some optimizing queue flushing

Swinehart, October 28, 1985 9:58:08 am PST

Handle => ID, H => Reseal, Log => VoiceUtils

changes to: DIRECTORY, LarkSmartsSupImpl, ConversationID, Reseal, IntervalSpec, NB, nullID, PartyID, SmartsID, LarkProgress, LarkSupervise, GetConv, GetSmartsInfo

Swinehart, November 9, 1985 5:03:39 pm PST

Major revision: MBQueue replaces supervisor process. More responsibility for own state transitions, socket calculations, key maintenance, ...

changes to: LarkProgress, NoteProgress, LarkSupervise, GetConv, larkStateForState, transForStates, ConvEvent, NoteProgress, RejectCall, NoteNewState, LarkSupervise, whatNeedsDoingIf, pairedState, WhatNeedsDoing, ]

Swinehart, June 1, 1986 7:33:23 pm PDT

Test hypothesis that Smarts supervisory actions don't have to be queued, since progress reports are queued at the Party level. Will vastly simplify Smartses. Keep the MBQueue around for things that might take a while and that can be done out of sequence. In fact, can keep LarkSmartsImpl's use of the MBQueue around for a while. It's harmless, says here. Left in also to help with QdNotification, although that's considered eliminatable.

changes to: LarkProgress, LarkSubstitution, QdLarkProgress, QdSubstitution, QdNotification, NoteNewState, LarkReportAction