Deleted unused (?) files

svn path=/trunk/; revision=4318

1 files changed, 0 insertions, 1417 deletions

diff --git a/pd/portaudio/pa_sgi/pa_sgi.c b/pd/portaudio/pa_sgi/pa_sgi.c
deleted file mode 100644
index 8b45d09d..00000000
--- a/pd/portaudio/pa_sgi/pa_sgi.c
+++ /dev/null
@@ -1,1417 +0,0 @@
-/*
- * $Id: pa_sgi.c,v 1.2.2.20 2004/01/03 19:20:09 pieter Exp $
- * PortAudio Portable Real-Time Audio Library. 
- * Latest Version at: http://www.portaudio.com.
- * Silicon Graphics (SGI) IRIX implementation by Pieter Suurmond.
- *
- * Based on the Open Source API proposed by Ross Bencina
- * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files
- * (the "Software"), to deal in the Software without restriction,
- * including without limitation the rights to use, copy, modify, merge,
- * publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * Any person wishing to distribute modifications to the Software is
- * requested to send the modifications to the original developer so that
- * they can be incorporated into the canonical version.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
- * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-/** @file
- @brief SGI IRIX AL implementation (according to V19 API version 2.0).
-
- @note This file started as a copy of pa_skeleton.c (v 1.1.2.35 2003/09/20), it
- has nothing to do with the old V18 pa_sgi version: this implementation uses the
- newer IRIX AL calls and uses pthreads instead of sproc.
-
- On IRIX, one may type './configure' followed by 'gmake' from the portaudio root 
- directory to build the static and shared libraries, as well as all the tests.
-
- On IRIX 6.5, using 'make' instead of 'gmake' may cause Makefile to fail. (This 
- happens on my machine: make does not understand syntax with 2 colons on a line,
- like this:
-               $(TESTS): bin/%: [snip]
-
- Maybe this is due to an old make version(?), my only solution is: use gmake.
- Anyway, all the tests compile well now, with GCC 3.3, as well as with MIPSpro 7.2.1.
- Tested:
-        - paqa_devs              ok, but at a certain point digital i/o fails:
-                                     TestAdvance: INPUT, device = 2, rate = 32000, numChannels = 1, format = 1
-                                     Possibly, this is an illegal sr or number of channels for digital i/o.
-        - paqa_errs              13 of the tests run ok, but 5 of them give weird results.
-        + patest1                ok.
-        + patest_buffer          ok.
-        + patest_callbackstop    ok.
-        - patest_clip            ok, but hear no difference between dithering turned OFF and ON.
-        + patest_hang            ok.
-        + patest_latency         ok.
-        + patest_leftright       ok.
-        + patest_maxsines        ok.
-        + patest_many            ok.
-        + patest_multi_sine      ok.
-        + patest_pink            ok.
-        + patest_prime           ok.
-        - patest_read_record     ok, but playback stops a little earlier than 5 seconds it seems(?).
-        + patest_record          ok.
-        + patest_ringmix         ok.
-        + patest_saw             ok.
-        + patest_sine            ok.
-        + patest_sine8           ok.
-        - patest_sine_formats    ok, FLOAT32 + INT16 + INT18 are OK, but UINT8 IS NOT OK!
-        + patest_sine_time       ok.
-        + patest_start_stop      ok, but under/overflow errors of course in the AL queue monitor.
-        + patest_stop            ok.
-        - patest_sync            ok?
-        + patest_toomanysines    ok.
-        - patest_underflow       ok? (stopping after SleepTime = 91: err=Stream is stopped)
-        - patest_wire            ok.
-        + patest_write_sine      ok.
-        + pa_devs                ok.
-                                 Ok on an Indy, in both stereo and quadrophonic mode.
-        + pa_fuzz                ok.
-        + pa_minlat              ok.
-
- Worked on (or checked) proposals:
- 
-  003:    Improve Latency Specification OK, but not 100% sure: plus or minus 1 host buffer?
-  004 OK: Allow Callbacks to Accept Variable Number of Frames per Buffer. 
-          Simply using a fixed host buffer size. Very roughly implemented now, the adaption
-          to limited-requested latencies and samplerate may be improved. At least this
-          implementation chooses its own internal host buffer size (no coredumps any longer).
-  005 OK: Blocking Read/Write Interface.
-  006:    Non-interleaved buffers seems OK? Covered by the buffer-processor and such?....
-  009 OK: Host error reporting should now be.
-  010 OK: State Machine and State Querying Functions.
-  011 OK: Renaming done.
-  014     Implementation Style Guidelines (sorry, my braces are not ANSI style).
-  015 OK: Callback Timestamps (During priming, though, these are still null!).
-  016 OK: Use Structs for Pa_OpenStream() Parameters.
-  019:    Notify Client When All Buffers Have Played (Ok, covered by the buffer processor?)
-  020 OK: Allow Callback to prime output stream (StartStream() should do the priming)
-          Should be tested more thoroughly for full duplex streams. (patest_prime seems ok).
-
-
- @todo Underrun or overflow flags at some more places.
-
- @todo Callback Timestamps during priming.
-
- @todo Improve adaption to number of channels, samplerate and such when inventing 
-       some frames per host buffer (when client requests 0).
-
- @todo Make a complete new version to support 'sproc'-applications.
-       Or could we manage that with some clever if-defs?
-       It must be clear which version we use (especially when using pa as lib!):
-       an irix-sproc() version or pthread version.
-
- @todo In Makefile.in: 'make clean' does not remove lib/libportaudio.so.0.0.19.
-    
- Note: Even when mono-output is requested, with ALv7, the audio library opens
-       a outputs stereo. One can observe this in SGI's 'Audio Queue Monitor'.
-*/
-
-#include <string.h>         /* For strlen() but also for strerror()! */
-#include <stdio.h>          /* printf() */
-#include <math.h>           /* fabs()   */
-
-#include <dmedia/audio.h>   /* IRIX AL (audio library). Link with -laudio. */
-#include <dmedia/dmedia.h>  /* IRIX DL (digital media library), solely for */
-                            /* function dmGetUST(). Link with -ldmedia.    */
-#include <errno.h>          /* To catch 'oserror' after AL-calls. */
-#include <pthread.h>        /* POSIX threads. */
-#include <unistd.h>
-
-#include "pa_util.h"
-#include "pa_allocation.h"
-#include "pa_hostapi.h"
-#include "pa_stream.h"
-#include "pa_cpuload.h"
-#include "pa_process.h"
-
-                            /* Uncomment for diagnostics: */
-#define DBUG(x) /*{ printf x; fflush(stdout); }*/
-
-
-/* prototypes for functions declared in this file */
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif /* __cplusplus */
-
-PaError PaSGI_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-
-
-static void Terminate( struct PaUtilHostApiRepresentation *hostApi );
-static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
-                                  const PaStreamParameters *inputParameters,
-                                  const PaStreamParameters *outputParameters,
-                                  double sampleRate );
-static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
-                           PaStream** s,
-                           const PaStreamParameters *ipp,
-                           const PaStreamParameters *opp,
-                           double sampleRate,
-                           unsigned long framesPerBuffer,
-                           PaStreamFlags streamFlags,
-                           PaStreamCallback *streamCallback,
-                           void *userData );
-static PaError CloseStream( PaStream* stream );
-static PaError StartStream( PaStream *stream );
-static PaError StopStream( PaStream *stream );
-static PaError AbortStream( PaStream *stream );
-static PaError IsStreamStopped( PaStream *s );
-static PaError IsStreamActive( PaStream *stream );
-static PaTime GetStreamTime( PaStream *stream );
-static double GetStreamCpuLoad( PaStream* stream );
-static PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
-static PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
-static signed long GetStreamReadAvailable( PaStream* stream );
-static signed long GetStreamWriteAvailable( PaStream* stream );
-
-
-/* 
-    Apparently, we must use macros for reporting unanticipated host errors.    
-    Only in case we return paUnanticipatedHostError from an Portaudio call, 
-    we have to call one of the following three macro's.
-    (Constant paAL is defined in pa_common/portaudio.h. See also proposal 009.)
-
-    After an AL error, use this to translate the AL error code to human text:
-*/
-#define PA_SGI_SET_LAST_AL_ERROR() \
-    {\
-    int ee = oserror();\
-    PaUtil_SetLastHostErrorInfo(paAL, ee, alGetErrorString(ee));\
-    }
-/*
-    But after a generic IRIX error, let strerror() translate the error code from
-    the operating system and use this (strerror() gives the same as perror()):
-*/
-#define PA_SGI_SET_LAST_IRIX_ERROR() \
-    {\
-    int ee = oserror();\
-    PaUtil_SetLastHostErrorInfo(paAL, ee, strerror(ee));\
-    }
-
-/* GOT RID OF calling PaUtil_SetLastHostErrorInfo() with 0 as error number.
-- Weird samplerate difference became:  paInvalidSampleRate.
-- Failing to set AL queue size became: paInternalError
-  (Because I cannot decide between paBufferTooBig and paBufferTooSmall
-   because it may even the 'default AL queue size that failed... Or 
-   should we introduce another error-code like 'paInvalidQueueSize'?... NO)
-*/
-
-/* PaSGIHostApiRepresentation - host api datastructure specific to this implementation */
-
-typedef struct
-{
-    PaUtilHostApiRepresentation   inheritedHostApiRep;
-    PaUtilStreamInterface         callbackStreamInterface;
-    PaUtilStreamInterface         blockingStreamInterface;
-    PaUtilAllocationGroup*        allocations;
-                                                    /* implementation specific data goes here. */
-    ALvalue*                      sgiDeviceIDs;     /* Array of AL resource device numbers.    */
- /* PaHostApiIndex                hostApiIndex;        Hu? As in the linux and oss files? */
-}
-PaSGIHostApiRepresentation;
-
-/*
-    Initialises sgiDeviceIDs array.
-*/
-PaError PaSGI_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
-{
-    PaError                     result = paNoError;
-    int                         e, i, deviceCount, def_in, def_out;
-    PaSGIHostApiRepresentation* SGIHostApi;
-    PaDeviceInfo*               deviceInfoArray;    
-    static const short          numParams = 4;            /* Array with name, samplerate, channels */
-    ALpv                        y[numParams];             /* and type.                             */
-    static const short          maxDevNameChars = 32;     /* Including the terminating null char.  */
-    char                        devName[maxDevNameChars]; /* Too lazy for dynamic alloc.           */
-
-    /* DBUG(("PaSGI_Initialize() started.\n")); */
-    SGIHostApi = (PaSGIHostApiRepresentation*)PaUtil_AllocateMemory(sizeof(PaSGIHostApiRepresentation));
-    if( !SGIHostApi )
-        { result = paInsufficientMemory; goto cleanup; }
-    SGIHostApi->allocations = PaUtil_CreateAllocationGroup();
-    if( !SGIHostApi->allocations )
-        { result = paInsufficientMemory; goto cleanup; }
-    *hostApi = &SGIHostApi->inheritedHostApiRep;
-    (*hostApi)->info.structVersion = 1;
-    (*hostApi)->info.type = paAL;                       /* IRIX AL type id, was paInDevelopment. */
-    (*hostApi)->info.name = "SGI IRIX AL";
-    (*hostApi)->info.defaultInputDevice  = paNoDevice;  /* Set later. */
-    (*hostApi)->info.defaultOutputDevice = paNoDevice;  /* Set later.  */
-    (*hostApi)->info.deviceCount = 0;                   /* We 'll increment in the loop below. */
-    
-    /* Determine the total number of input and output devices (thanks to Gary Scavone). */
-    deviceCount = alQueryValues(AL_SYSTEM, AL_DEVICES, 0, 0, 0, 0);
-    if (deviceCount < 0)        /* Returns -1 in case of failure. */
-        {
-        DBUG(("Failed to count devices: alQueryValues()=%d; %s.\n",
-               deviceCount, alGetErrorString(oserror())));
-        result = paDeviceUnavailable;             /* Is this an appropriate error return code? */
-        goto cleanup;
-        }
-    if (deviceCount > 0)
-        {
-        (*hostApi)->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
-                                  SGIHostApi->allocations, sizeof(PaDeviceInfo*) * deviceCount);
-        if (!(*hostApi)->deviceInfos)
-            { result = paInsufficientMemory; goto cleanup; }
-
-        /* Allocate all device info structs in a contiguous block. */
-        deviceInfoArray = (PaDeviceInfo*)PaUtil_GroupAllocateMemory(
-                          SGIHostApi->allocations, sizeof(PaDeviceInfo) * deviceCount);
-        if (!deviceInfoArray)
-            { result = paInsufficientMemory; goto cleanup; }
-                                                             /* Store all AL device IDs in an array. */
-        SGIHostApi->sgiDeviceIDs = (ALvalue*)PaUtil_GroupAllocateMemory(SGIHostApi->allocations,
-                                                                        deviceCount * sizeof(ALvalue));
-        if (!SGIHostApi->sgiDeviceIDs)
-            { result = paInsufficientMemory; goto cleanup; }
-        /* Same query again, but now store all IDs in array sgiDeviceIDs (still using no qualifiers).*/
-        e = alQueryValues(AL_SYSTEM, AL_DEVICES, SGIHostApi->sgiDeviceIDs, deviceCount, 0, 0);
-        if (e != deviceCount)
-            {
-            if (e < 0)                                     /* Sure an AL error really occurred. */
-                { PA_SGI_SET_LAST_AL_ERROR() result = paUnanticipatedHostError; }
-            else                                                 /* Seems we lost some devices. */
-                { DBUG(("Number of devices suddenly changed!\n")); result = paDeviceUnavailable; }
-            goto cleanup;
-            }
-        y[0].param = AL_DEFAULT_INPUT;
-        y[1].param = AL_DEFAULT_OUTPUT;
-        e = alGetParams(AL_SYSTEM, y, 2);       /* Get params global to the AL system. */
-        if (e != 2)
-            {
-            if (e < 0)
-                {
-                PA_SGI_SET_LAST_AL_ERROR()         /* Calls oserror() and alGetErrorString(). */
-                result = paUnanticipatedHostError; /* Sure an AL error really occurred. */
-                }
-            else
-                {
-                DBUG(("Default input and/or output could not be found!\n"));
-                result = paDeviceUnavailable;   /* FIX: What if only in or out are available? */
-                }
-            goto cleanup;
-            }
-        def_in  = y[0].value.i;         /* Remember both AL devices for a while. */
-        def_out = y[1].value.i;
-        y[0].param     = AL_NAME;
-        y[0].value.ptr = devName;
-        y[0].sizeIn    = maxDevNameChars; /* Including terminating null char. */
-        y[1].param     = AL_RATE;
-        y[2].param     = AL_CHANNELS;
-        y[3].param     = AL_TYPE;       /* Subtype of AL_INPUT_DEVICE_TYPE or AL_OUTPUT_DEVICE_TYPE? */
-        for (i=0; i < deviceCount; ++i) /* Fill allocated deviceInfo structs. */
-            {
-            PaDeviceInfo *deviceInfo = &deviceInfoArray[i];
-            deviceInfo->structVersion = 2;
-            deviceInfo->hostApi = hostApiIndex; /* Retrieve name, samplerate, channels and type. */
-            e = alGetParams(SGIHostApi->sgiDeviceIDs[i].i, y, numParams);
-            if (e != numParams)
-                {
-                if (e < 0) /* Calls oserror() and alGetErrorString(). */
-                    { PA_SGI_SET_LAST_AL_ERROR() result = paUnanticipatedHostError; }
-                else
-                    { DBUG(("alGetParams() could not get all params!\n")); result = paInternalError; }
-                goto cleanup;
-                }
-            deviceInfo->name = (char*)PaUtil_GroupAllocateMemory(SGIHostApi->allocations, strlen(devName) + 1);
-            if (!deviceInfo->name)
-                { result = paInsufficientMemory; goto cleanup; }
-            strcpy((char*)deviceInfo->name, devName);
-
-            /* Determine whether the received number of channels belongs to input or output device. */
-            if (alIsSubtype(AL_INPUT_DEVICE_TYPE, y[3].value.i))
-                {
-                deviceInfo->maxInputChannels  = y[2].value.i;
-                deviceInfo->maxOutputChannels = 0;
-                }
-            else if (alIsSubtype(AL_OUTPUT_DEVICE_TYPE, y[3].value.i))
-                {
-                deviceInfo->maxInputChannels  = 0;
-                deviceInfo->maxOutputChannels = y[2].value.i;
-                }
-            else /* Should never occur. */
-                {
-                DBUG(("AL device is neither input nor output!\n"));
-                result = paInternalError;
-                goto cleanup;
-                }
-            
-            /* Determine if this device is the default (in or out). If so, assign. */
-            if (def_in == SGIHostApi->sgiDeviceIDs[i].i)
-                {
-                if ((*hostApi)->info.defaultInputDevice != paNoDevice)
-                    {
-                    DBUG(("Default input already assigned!\n"));
-                    result = paInternalError;
-                    goto cleanup;
-                    }
-                (*hostApi)->info.defaultInputDevice = i;
-                /* DBUG(("Default input assigned to pa device %d (%s).\n", i, deviceInfo->name)); */
-                }
-            else if (def_out == SGIHostApi->sgiDeviceIDs[i].i)
-                {
-                if ((*hostApi)->info.defaultOutputDevice != paNoDevice)
-                    {
-                    DBUG(("Default output already assigned!\n"));
-                    result = paInternalError;
-                    goto cleanup;
-                    }
-                (*hostApi)->info.defaultOutputDevice = i;
-                /* DBUG(("Default output assigned to pa device %d (%s).\n", i, deviceInfo->name)); */
-                }
-            /*---------------------------------------------- Default latencies set to 'reasonable' values. */
-            deviceInfo->defaultLowInputLatency   = 0.050; /* 50 milliseconds seems ok. */
-            deviceInfo->defaultLowOutputLatency  = 0.050; /* These are ALSO ABSOLUTE MINIMA in OpenStream(). */
-            deviceInfo->defaultHighInputLatency  = 0.500; /* 500 milliseconds a reasonable value? */
-            deviceInfo->defaultHighOutputLatency = 0.500; /* Ten times these are ABSOLUTE MAX in OpenStream()). */
-
-            deviceInfo->defaultSampleRate = alFixedToDouble(y[1].value.ll); /* Read current sr. */
-            (*hostApi)->deviceInfos[i] = deviceInfo;
-            ++(*hostApi)->info.deviceCount;
-            }
-        }
-    /* What if (deviceCount==0)? */
-    (*hostApi)->Terminate         = Terminate;
-    (*hostApi)->OpenStream        = OpenStream;
-    (*hostApi)->IsFormatSupported = IsFormatSupported;
-
-    PaUtil_InitializeStreamInterface(&SGIHostApi->callbackStreamInterface, CloseStream, StartStream,
-                                     StopStream, AbortStream, IsStreamStopped, IsStreamActive,
-                                     GetStreamTime, GetStreamCpuLoad,
-                                     PaUtil_DummyRead, PaUtil_DummyWrite,
-                                     PaUtil_DummyGetReadAvailable, PaUtil_DummyGetWriteAvailable );
-
-    PaUtil_InitializeStreamInterface(&SGIHostApi->blockingStreamInterface, CloseStream, StartStream,
-                                     StopStream, AbortStream, IsStreamStopped, IsStreamActive,
-                                     GetStreamTime, PaUtil_DummyGetCpuLoad,
-                                     ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable );
-cleanup:        
-    if (result != paNoError)
-        {
-        if (SGIHostApi)
-            {
-            if (SGIHostApi->allocations)
-                {
-                PaUtil_FreeAllAllocations(SGIHostApi->allocations);
-                PaUtil_DestroyAllocationGroup(SGIHostApi->allocations);
-                }
-            PaUtil_FreeMemory(SGIHostApi);
-            }
-        }
-    return result;
-}
-
-
-static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
-{
-    PaSGIHostApiRepresentation *SGIHostApi = (PaSGIHostApiRepresentation*)hostApi;
-
-    /* Clean up any resources not handled by the allocation group. */
-    if( SGIHostApi->allocations )
-    {
-        PaUtil_FreeAllAllocations( SGIHostApi->allocations );
-        PaUtil_DestroyAllocationGroup( SGIHostApi->allocations );
-    }
-    PaUtil_FreeMemory( SGIHostApi );
-}
-
-/*
-    Check if samplerate is supported for this output device. Called once
-    or twice by function IsFormatSupported() and one time by OpenStream().
-    When paUnanticipatedHostError is returned, the caller does NOT have 
-    to call PA_SGI_SET_LAST_AL_ERROR() or such.
-*/
-static PaError sr_supported(int al_device, double sr)
-{
-    int         e;
-    PaError     result;
-    ALparamInfo pinfo;
-    long long   lsr;    /* 64 bit fixed point internal AL samplerate. */
-    
-    if (alGetParamInfo(al_device, AL_RATE, &pinfo))
-        {
-        e = oserror();
-        DBUG(("alGetParamInfo(AL_RATE) failed: %s.\n", alGetErrorString(e)));
-        if (e == AL_BAD_RESOURCE)
-            result = paInvalidDevice;
-        else
-            {
-            PA_SGI_SET_LAST_AL_ERROR()        /* Sure an AL error occured. */
-            result = paUnanticipatedHostError;
-            }
-        }
-    else
-        {
-        lsr = alDoubleToFixed(sr);  /* Within the range? */
-        if ((pinfo.min.ll <= lsr) && (lsr <= pinfo.max.ll))
-            result = paFormatIsSupported;
-        else
-            result = paInvalidSampleRate;
-        }
-    /* DBUG(("sr_supported()=%d.\n", result)); */
-    return result;
-}
-
-
-/*
-    See common/portaudio.h (suggestedLatency field is ignored).
-*/
-static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
-                                  const PaStreamParameters *inputParameters,
-                                  const PaStreamParameters *outputParameters,
-                                  double sampleRate )
-{
-    PaSGIHostApiRepresentation* SGIHostApi = (PaSGIHostApiRepresentation*)hostApi;
-    int inputChannelCount, outputChannelCount, result;
-    PaSampleFormat inputSampleFormat, outputSampleFormat;
-    
-    if( inputParameters )
-    {
-        inputChannelCount = inputParameters->channelCount;
-        inputSampleFormat = inputParameters->sampleFormat;
-        /* Unless alternate device specification is supported, reject the use of
-           paUseHostApiSpecificDeviceSpecification. */
-        if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
-            return paInvalidDevice;
-        /* Check that input device can support inputChannelCount. */
-        if( inputChannelCount > hostApi->deviceInfos[ inputParameters->device ]->maxInputChannels )
-            return paInvalidChannelCount;
-        /* Validate inputStreamInfo. */
-        if( inputParameters->hostApiSpecificStreamInfo )
-            return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
-        /* Check if samplerate is supported for this input device. */
-        result = sr_supported(SGIHostApi->sgiDeviceIDs[inputParameters->device].i, sampleRate);
-        if (result != paFormatIsSupported) /* PA_SGI_SET_LAST_AL_ERROR() may already be called. */
-            return result;
-    }
-    else
-    {
-        inputChannelCount = 0;
-    }
-    if( outputParameters ) /* As with input above. */
-    {
-        outputChannelCount = outputParameters->channelCount;
-        outputSampleFormat = outputParameters->sampleFormat;
-        if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
-            return paInvalidDevice;
-        if( outputChannelCount > hostApi->deviceInfos[ outputParameters->device ]->maxOutputChannels )
-            return paInvalidChannelCount;
-        if( outputParameters->hostApiSpecificStreamInfo )
-            return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
-        /* Check if samplerate is supported for this output device. */
-        result = sr_supported(SGIHostApi->sgiDeviceIDs[outputParameters->device].i, sampleRate);
-        if (result != paFormatIsSupported)
-            return result;
-    }
-    else
-    {
-        outputChannelCount = 0;
-    }
-    /*  IMPLEMENT ME:
-        Because the buffer adapter handles conversion between all standard
-        sample formats, the following checks are only required if paCustomFormat
-        is implemented, or under some other unusual conditions.
-
-            - check that input device can support inputSampleFormat, or that
-              we have the capability to convert from outputSampleFormat to
-              a native format
-
-            - check that output device can support outputSampleFormat, or that
-              we have the capability to convert from outputSampleFormat to
-              a native format
-    */
-    /* suppress unused variable warnings */
-    (void) inputSampleFormat;
-    (void) outputSampleFormat;
-    return paFormatIsSupported;
-}
-
-/** Auxilary struct, embedded twice in the struct below, for inputs and outputs. */
-typedef struct PaSGIhostPortBuffer
-{
-            /** NULL means IRIX AL port closed. */
-    ALport  port;
-            /** NULL means memory not allocated. */
-    void*   buffer;
-}
-    PaSGIhostPortBuffer;
-
-/** Stream data structure specifically for this IRIX AL implementation. */
-typedef struct PaSGIStream
-{
-    PaUtilStreamRepresentation  streamRepresentation;
-    PaUtilCpuLoadMeasurer       cpuLoadMeasurer;
-    PaUtilBufferProcessor       bufferProcessor;
-    unsigned long               framesPerHostCallback;
-                                /** Allocated host buffers and AL ports. */
-    PaSGIhostPortBuffer         hostPortBuffIn,
-                                hostPortBuffOut;
-                                /** Copy of stream flags given to OpenStream(). */
-    PaStreamFlags               streamFlags;
-                                /** Stream state may be 0 or 1 or 2, but never 3. */
-    unsigned char               state;
-                                /** Requests to stop or abort may come from the parent,
-                                    or from the child itself (user callback result). */
-    unsigned char               stopAbort;
-    pthread_t                   thread;
-}
-    PaSGIStream;
-
-/** Stream can be in only one of the following three states: stopped (1), active (2), or
-    callback finshed (0). To prevent 'state 3' from occurring, Setting and testing of the
-    state bits is done atomically.
-*/
-#define PA_SGI_STREAM_FLAG_FINISHED_ (0) /* After callback finished or cancelled queued buffers. */
-#define PA_SGI_STREAM_FLAG_STOPPED_  (1) /* Set by OpenStream(), StopStream() and AbortStream(). */
-#define PA_SGI_STREAM_FLAG_ACTIVE_   (2) /* Set by StartStream. Reset by OpenStream(),           */
-                                         /* StopStream() and AbortStream().                      */
-
-/** Stop requests, via the 'stopAbort' field can be either 1, meaning 'stop' or 2, meaning 'abort'.
-    When both occur at the same time, 'abort' takes precedence, even after a first 'stop'.
-*/
-#define PA_SGI_REQ_CONT_    (0)         /* Reset by OpenStream(), StopStream and AbortStream. */
-#define PA_SGI_REQ_STOP_    (1)         /* Set by StopStream(). */
-#define PA_SGI_REQ_ABORT_   (2)         /* Set by AbortStream(). */
-
-
-/** Called by OpenStream() once or twice. First, the number of channels, sampleformat, and
-    queue size are configured. The configuration is then bound to the specified AL device. 
-    Then an AL port is opened. Finally, the samplerate of the device is altered (or at least
-    set again).
-    
-    After successful return, actual latency is written in *latency, and actual samplerate 
-    in *samplerate.
-
-    @param pa_params may be NULL and pa_params->channelCount may also be null, in both 
-           cases the function immediately returns.
-    @return paNoError if configuration was skipped or if it succeeded.
-*/
-static PaError set_sgi_device(ALvalue*                  sgiDeviceIDs,   /* Array built by PaSGI_Initialize(). */
-                              const PaStreamParameters* pa_params,      /* read device and channels. */                             
-                              double*                   latency,        /* Read and write in seconds. */
-                              
-                              PaSampleFormat            pasfmt,         /* Don't read from pa_params!. */
-                              char*                     direction,      /* "r" or "w". */
-                              char*                     name,
-                              long                      framesPerHostBuffer,
-                              double*                   samplerate,     /* Also writes back here. */
-                              PaSGIhostPortBuffer*      hostPortBuff)   /* Receive pointers here. */
-{
-    int       bytesPerFrame, sgiDevice, alErr, d, dd, iq_size, default_iq_size;
-    ALpv      pvs[2];
-    ALconfig  alc = NULL;
-    PaError   result = paNoError;
-
-    if (!pa_params)
-        goto cleanup;                  /* Not errors, just not full duplex, skip all. */
-    if (!pa_params->channelCount)
-        goto cleanup;
-    alc = alNewConfig();    /* Create default config. This defaults to stereo, 16-bit integer data. */
-    if (!alc)               /* Call alFreeConfig() later, when done with it. */
-        { result = paInsufficientMemory;  goto cleanup; }
-    /*----------------------- CONFIGURE NUMBER OF CHANNELS: ---------------------------*/
-    if (alSetChannels(alc, pa_params->channelCount))          /* Returns 0 on success. */
-        {
-        if (oserror() == AL_BAD_CHANNELS)
-            result = paInvalidChannelCount;
-        else
-            {
-            PA_SGI_SET_LAST_AL_ERROR()
-            result = paUnanticipatedHostError;
-            }
-        goto cleanup;
-        }
-    bytesPerFrame = pa_params->channelCount;          /* Is multiplied by width below. */
-    /*----------------------- CONFIGURE SAMPLE FORMAT: --------------------------------*/
-    if (pasfmt == paFloat32)
-        {
-        if (alSetSampFmt(alc, AL_SAMPFMT_FLOAT))
-            {
-            if (oserror() == AL_BAD_SAMPFMT)
-                result = paSampleFormatNotSupported;
-            else
-                {
-                PA_SGI_SET_LAST_AL_ERROR()
-                result = paUnanticipatedHostError; 
-                }
-            goto cleanup;
-            }
-        bytesPerFrame *= 4;             /* No need to set width for floats. */
-        }
-    else
-        {
-        if (alSetSampFmt(alc, AL_SAMPFMT_TWOSCOMP))
-            {
-            if (oserror() == AL_BAD_SAMPFMT)
-                result = paSampleFormatNotSupported;
-            else
-                {
-                PA_SGI_SET_LAST_AL_ERROR()
-                result = paUnanticipatedHostError;
-                }
-            goto cleanup;
-            }
-        if (pasfmt == paInt8)
-            {
-            if (alSetWidth(alc, AL_SAMPLE_8))
-                {
-                if (oserror() == AL_BAD_WIDTH)
-                    result = paSampleFormatNotSupported;
-                else
-                    {
-                    PA_SGI_SET_LAST_AL_ERROR()
-                    result = paUnanticipatedHostError;
-                    }
-                goto cleanup;
-                }
-            /* bytesPerFrame *= 1; */
-            }
-        else if (pasfmt == paInt16)
-            {
-            if (alSetWidth(alc, AL_SAMPLE_16))
-                {
-                if (oserror() == AL_BAD_WIDTH)
-                    result = paSampleFormatNotSupported;
-                else
-                    {
-                    PA_SGI_SET_LAST_AL_ERROR()
-                    result = paUnanticipatedHostError;
-                    }
-                goto cleanup;
-                }
-            bytesPerFrame *= 2;
-            }
-        else if (pasfmt == paInt24)
-            {
-            if (alSetWidth(alc, AL_SAMPLE_24))
-                {
-                if (oserror() == AL_BAD_WIDTH)
-                    result = paSampleFormatNotSupported;
-                else
-                    {
-                    PA_SGI_SET_LAST_AL_ERROR()
-                    result = paUnanticipatedHostError;
-                    }
-                goto cleanup;
-                }
-            bytesPerFrame *= 3;   /* OR 4 ???????! */
-            }
-        else return paSampleFormatNotSupported;
-        }
-    /*----------------------- SET INTERNAL AL QUEUE SIZE: -------------------------------*/
-    /*  The AL API doesn't provide a means for querying minimum and maximum buffer sizes.
-        So, if the requested size fails, try again with a value that is closer to the AL's 
-        default queue size. In this implementation, 'Portaudio latency' corresponds to
-        the AL queue size minus one buffersize:
-                                                 AL queue size - framesPerHostBuffer
-                                    PA latency = -----------------------------------
-                                                            sample rate                  */
-    default_iq_size = alGetQueueSize(alc);
-    if (default_iq_size < 0)     /* So let's first get that 'default size'. */
-        {                        /* Default internal queue size could not be determined. */
-        PA_SGI_SET_LAST_AL_ERROR()
-        result = paUnanticipatedHostError;
-        goto cleanup;
-        }
-    /* AL buffer becomes somewhat bigger than the suggested latency, notice this is   */
-    /* based on requsted samplerate, not in the actual rate, which is measured later. */
-    /* Do NOT read pa_params->suggestedLatency, but use the limited *latency param!   */
-    
-    iq_size = (int)(0.5 + ((*latency) * (*samplerate))) + (int)framesPerHostBuffer;
-                                                /* The AL buffer becomes somewhat     */
-                                                /* bigger than the suggested latency. */
-    if (iq_size < (framesPerHostBuffer << 1))   /* Make sure the minimum is twice     */
-        {                                       /* framesPerHostBuffer.               */
-        DBUG(("Setting minimum queue size.\n"));
-        iq_size = (framesPerHostBuffer << 1);
-        }
-    d = iq_size - default_iq_size;                 /* Determine whether we'll decrease */
-    while (alSetQueueSize(alc, iq_size))           /* or increase after failing.       */
-        {                                          /* Size in sample frames.           */
-        if (oserror() != AL_BAD_QSIZE)                       /* Stop at AL_BAD_CONFIG. */
-            {
-            PA_SGI_SET_LAST_AL_ERROR()
-            result = paUnanticipatedHostError;
-            goto cleanup;
-            }
-        dd = iq_size - default_iq_size;     /* Stop when even the default size failed  */
-        if (((d >= 0) && (dd <= 0)) ||      /* (dd=0) or when difference flipped sign. */
-            ((d <= 0) && (dd >= 0)) ||
-            (iq_size <= framesPerHostBuffer))  /* Also guarentee that framesPerHostBuffer */
-            {                                  /* can be subtracted (res>0) after return. */
-            DBUG(("Could not set AL queue size to %d sample frames!\n", iq_size));
-            result = paInternalError; /* FIX: PROBABLY AN INAPROPRIATE ERROR CODE HERE.   */
-            goto cleanup;             /* As inapropriate as paUnanticipatedHostError was? */
-            }
-        DBUG(("Failed to set internal queue size to %d frames, ", iq_size));
-        if (d > 0)
-            iq_size -= framesPerHostBuffer;    /* Try lesser multiple. */
-        else
-            iq_size += framesPerHostBuffer;    /* Try larger multiple. */
-        DBUG(("trying %d frames now...\n", iq_size));
-        }
-    /* Note: Actual latency is written back to *latency after meausuring actual (not
-             the requested) samplerate. See below. 
-    */
-    /*----------------------- ALLOCATE HOST BUFFER: --------------------------------------*/
-    hostPortBuff->buffer = PaUtil_AllocateMemory((long)bytesPerFrame * framesPerHostBuffer);
-    if (!hostPortBuff->buffer) /* Caller is responsible for cleanup+close after failures! */
-        { result = paInsufficientMemory; goto cleanup; }
-    /*----------------------- BIND CONFIGURATION TO DEVICE: ------------------------------*/
-    sgiDevice = sgiDeviceIDs[pa_params->device].i;
-    if (alSetDevice(alc, sgiDevice)) /* Try to switch the hardware. */
-        {
-        if (oserror() == AL_BAD_DEVICE)
-            result = paInvalidDevice;
-        else
-            {
-            PA_SGI_SET_LAST_AL_ERROR()
-            result = paUnanticipatedHostError;
-            }
-        goto cleanup;
-        }
-    /*----------------------- OPEN PORT: ----------------------------------------------*/
-    hostPortBuff->port = alOpenPort(name, direction, alc);  /* Caller is responsible   */
-    if (!hostPortBuff->port)                                /* for closing after fail. */
-        {
-        PA_SGI_SET_LAST_AL_ERROR()
-        result = paUnanticipatedHostError;
-        goto cleanup;
-        }                                                     /* Maybe set SR earlier? */
-    /*----------------------- SET SAMPLERATE: -----------------------------------------*/
-    pvs[0].param    = AL_MASTER_CLOCK;       /* Attempt to set a crystal-based sample- */
-    pvs[0].value.i  = AL_CRYSTAL_MCLK_TYPE;  /* rate on input or output device.        */
-    pvs[1].param    = AL_RATE;
-    pvs[1].value.ll = alDoubleToFixed(*samplerate);
-    if (2 != alSetParams(sgiDevice, pvs, 2))
-        {
-        DBUG(("alSetParams() failed to set samplerate to %.4f Hz!\n", *samplerate));
-        result = paInvalidSampleRate;
-        goto cleanup;
-        }
-    /*----------------------- GET ACTUAL SAMPLERATE: ---------------------------*/
-    alErr = alGetParams(sgiDevice, &pvs[1], 1); /* SEE WHAT WE REALY SET IT TO. */
-    if (alErr != 1)                             /* And return that to caller.   */
-        {
-        DBUG(("alGetParams() failed to read samplerate!\n"));
-        result = paInvalidSampleRate;
-        goto cleanup;
-        }
-    *samplerate = alFixedToDouble(pvs[1].value.ll);  /* Between 1 Hz and 1 MHz. */
-    if ((*samplerate < 1.0) || (*samplerate > 1000000.0))
-        {
-        DBUG(("alFixedToDouble() resulted a weird samplerate: %.6f Hz!\n", *samplerate));
-        result = paInvalidSampleRate;
-        goto cleanup;
-        }
-    /*----------------------- CALC ACTUAL LATENCY (based on actual SR): -----------------------*/
-    *latency = (iq_size - framesPerHostBuffer) / (*samplerate);         /* FIX:  SURE > 0!???? */
-cleanup:
-    if (alc)
-        alFreeConfig(alc); /* We no longer need configuration. */
-    return result;
-}
-
-/**
-    Called by OpenStream() if it fails and by CloseStream. Only used here, in this file.
-    Fields MUST be set to NULL or to a valid value, prior to call.
-*/
-static void streamCleanupAndClose(PaSGIStream* stream)
-{
-    if (stream->hostPortBuffIn.port)    alClosePort(stream->hostPortBuffIn.port);         /* Close AL ports.  */
-    if (stream->hostPortBuffIn.buffer)  PaUtil_FreeMemory(stream->hostPortBuffIn.buffer); /* Release buffers. */
-    if (stream->hostPortBuffOut.port)   alClosePort(stream->hostPortBuffOut.port);
-    if (stream->hostPortBuffOut.buffer) PaUtil_FreeMemory(stream->hostPortBuffOut.buffer);
-}
-
-
-/* See pa_hostapi.h for a list of validity guarantees made about OpenStream parameters. */
-static PaError OpenStream(struct PaUtilHostApiRepresentation* hostApi,
-                          PaStream**                          s,
-                          const PaStreamParameters*           ipp,
-                          const PaStreamParameters*           opp,
-                          double                              sampleRate, /* Common to both i and o. */
-                          unsigned long                       framesPerBuffer,
-                          PaStreamFlags                       streamFlags,
-                          PaStreamCallback*                   streamCallback,
-                          void*                               userData)
-{
-    PaError                     result = paNoError;
-    PaSGIHostApiRepresentation* SGIHostApi = (PaSGIHostApiRepresentation*)hostApi;
-    PaSGIStream*                stream = 0;
-    unsigned long               framesPerHostBuffer;   /* Not necessarily the same as framesPerBuffer. */
-    int                         inputChannelCount,     outputChannelCount;
-    PaSampleFormat              inputSampleFormat,     outputSampleFormat,
-                                hostInputSampleFormat, hostOutputSampleFormat;
-    double                      sr_in,                 sr_out,
-                                latency_in,            latency_out;
-    static const PaSampleFormat irixFormats = (paInt8 | paInt16 | paInt24 | paFloat32);
-    /* Constant used by PaUtil_SelectClosestAvailableFormat(). Because IRIX AL does not
-       provide a way to query for possible formats for a given device, interface or port,
-       just add together the formats we know that are supported in general by IRIX AL 
-       (at the end of the year 2003): AL_SAMPFMT_TWOSCOMP with AL_SAMPLE_8(=paInt8),
-       AL_SAMPLE_16(=paInt16) or AL_SAMPLE_24(=paInt24); AL_SAMPFMT_FLOAT(=paFloat32); 
-       AL_SAMPFMT_DOUBLE(=paFloat64); IRIX misses unsigned 8 and 32 bit signed ints.
-    */
-    DBUG(("OpenStream() started.\n"));
-    if (ipp)
-        {
-        inputChannelCount = ipp->channelCount;
-        inputSampleFormat = ipp->sampleFormat;
-        /* Unless alternate device specification is supported, reject the use of paUseHostApiSpecificDeviceSpecification. */
-        if (ipp->device == paUseHostApiSpecificDeviceSpecification) /* DEVICE CHOOSEN BY CLIENT. */
-            return paInvalidDevice;
-        /* Check that input device can support inputChannelCount. */
-        if (inputChannelCount > hostApi->deviceInfos[ipp->device]->maxInputChannels)
-            return paInvalidChannelCount;
-        /* Validate inputStreamInfo. */
-        if (ipp->hostApiSpecificStreamInfo)
-            return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
-        hostInputSampleFormat = PaUtil_SelectClosestAvailableFormat(irixFormats, inputSampleFormat);
-        /* Check if samplerate is supported for this input device. */
-        result = sr_supported(SGIHostApi->sgiDeviceIDs[ipp->device].i, sampleRate);
-        if (result != paFormatIsSupported) /* PA_SGI_SET_LAST_AL_ERROR() may already be called. */
-            return result;
-        /* Validate input latency. Use defaults if necessary. */
-        if (ipp->suggestedLatency < hostApi->deviceInfos[ipp->device]->defaultLowInputLatency)
-            latency_in = hostApi->deviceInfos[ipp->device]->defaultLowInputLatency;         /* Low = minimum. */
-        else if (ipp->suggestedLatency > 10.0 * hostApi->deviceInfos[ipp->device]->defaultHighInputLatency)
-            latency_in = 10.0 * hostApi->deviceInfos[ipp->device]->defaultHighInputLatency; /* 10*High = max. */
-        else
-            latency_in = ipp->suggestedLatency;
-        }
-    else
-        {
-        inputChannelCount = 0;
-        inputSampleFormat = hostInputSampleFormat = paInt16; /* Surpress 'uninitialised var' warnings. */
-        latency_in = 0.0; /* Necessary? */
-        }
-    if (opp)
-        {
-        outputChannelCount = opp->channelCount;        
-        outputSampleFormat = opp->sampleFormat;
-        if (opp->device == paUseHostApiSpecificDeviceSpecification) /* Like input (above). */
-            return paInvalidDevice;
-        if (outputChannelCount > hostApi->deviceInfos[opp->device]->maxOutputChannels)
-            return paInvalidChannelCount;
-        if (opp->hostApiSpecificStreamInfo )
-            return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
-        hostOutputSampleFormat = PaUtil_SelectClosestAvailableFormat(irixFormats, outputSampleFormat);
-        /* Check if samplerate is supported for this output device. */
-        result = sr_supported(SGIHostApi->sgiDeviceIDs[opp->device].i, sampleRate);
-        if (result != paFormatIsSupported)
-            return result;
-        /* Validate output latency. Use defaults if necessary. */
-        if (opp->suggestedLatency < hostApi->deviceInfos[opp->device]->defaultLowOutputLatency)
-            latency_out = hostApi->deviceInfos[opp->device]->defaultLowOutputLatency;         /* Low = minimum. */
-        else if (opp->suggestedLatency > 10.0 * hostApi->deviceInfos[opp->device]->defaultHighOutputLatency)
-            latency_out = 10.0 * hostApi->deviceInfos[opp->device]->defaultHighOutputLatency; /* 10*High = max. */
-        else
-            latency_out = opp->suggestedLatency;
-        }
-    else
-        {
-        outputChannelCount = 0;
-        outputSampleFormat = hostOutputSampleFormat = paInt16; /* Surpress 'uninitialised var' warning. */
-        latency_out = 0.0;
-        }
-    /*  Sure that ipp and opp will never be both NULL. */
-
-    if( (streamFlags & paPlatformSpecificFlags) != 0 )  /* Validate platform specific flags.  */
-        return paInvalidFlag;                           /* Unexpected platform specific flag. */
-
-    stream = (PaSGIStream*)PaUtil_AllocateMemory( sizeof(PaSGIStream) );
-    if (!stream)
-        { result = paInsufficientMemory; goto cleanup; }
-
-    stream->hostPortBuffIn.port    = (ALport)NULL;       /* Ports closed.   */
-    stream->hostPortBuffIn.buffer  =         NULL;       /* No buffers yet. */
-    stream->hostPortBuffOut.port   = (ALport)NULL;
-    stream->hostPortBuffOut.buffer =         NULL;
-
-    if (streamCallback)
-        PaUtil_InitializeStreamRepresentation(&stream->streamRepresentation,
-               &SGIHostApi->callbackStreamInterface, streamCallback, userData);
-    else
-        PaUtil_InitializeStreamRepresentation(&stream->streamRepresentation,
-               &SGIHostApi->blockingStreamInterface, streamCallback, userData);
-                                                     /* (NULL.) */
-    if (framesPerBuffer == paFramesPerBufferUnspecified)            /* Proposal 004. */
-        { /* Keep framesPerBuffer zero but come up with some fixed host buffer size. */
-        double  lowest_lat = 0.0; /* 0.0 to surpress uninit warning, we're sure it will end up higher. */
-        if (ipp)
-            lowest_lat = latency_in;            /* Sure > 0.0! */
-        if (opp && (latency_out < lowest_lat))
-            lowest_lat = latency_out;
-        /* So that queue size becomes approximately 5 times framesPerHostBuffer: */
-        framesPerHostBuffer = (unsigned long)((lowest_lat * sampleRate) / 4.0);
-        /* But always limit: */
-        if (framesPerHostBuffer < 64L)
-            framesPerHostBuffer = 64L;
-        else if (framesPerHostBuffer > 32768L)
-            framesPerHostBuffer = 32768L;
-        DBUG(("Decided to use a fixed host buffer size of %ld frames.\n", framesPerHostBuffer));
-        }
-    else
-        framesPerHostBuffer = framesPerBuffer; /* Then just take the requested amount. No buffer-adaption yet? */
-
-    sr_in = sr_out = sampleRate;
-    /*-------------------------------------------------------------------------------------------*/
-    result = set_sgi_device(SGIHostApi->sgiDeviceIDs, /* Needed by alSetDevice and other functs. */
-                            ipp,                      /* Reads channelCount, device but NOT latency. */
-                            &latency_in,              /* Read limited requested latency but also WRITE actual. */
-                            hostInputSampleFormat,    /* For alSetSampFmt and alSetWidth. */                            
-                            "r",                      /* "r" for reading from input port. */
-                            "portaudio in",           /* Name string. */
-                            framesPerHostBuffer,      /* As calculated or as requested by the client. */
-                            &sr_in,                   /* Receive actual s.rate after setting it. */
-                            &stream->hostPortBuffIn); /* Receives ALport and input host buffer.  */
-    if (result != paNoError) goto cleanup;
-    /*-------------------------------------------------------------------------------------------*/
-    result = set_sgi_device(SGIHostApi->sgiDeviceIDs,
-                            opp,
-                            &latency_out,
-                            hostOutputSampleFormat,
-                            "w",                      /* "w" for writing. */
-                            "portaudio out",
-                            framesPerHostBuffer,
-                            &sr_out,
-                            &stream->hostPortBuffOut);
-    if (result != paNoError) goto cleanup;
-    /*------------------------------------------------------------------------------------------*/
-    if (fabs(sr_in - sr_out) > 0.001)                         /* Make sure both are the 'same'. */
-        {
-        DBUG(("Weird samplerate difference between input and output!\n"));
-        result = paInvalidSampleRate;            /* Could not come up with a better error code. */
-        goto cleanup;
-        }                                                                 /* sr_in '==' sr_out. */
-    sampleRate = sr_in;                  /* Following fields set to estimated or actual values: */
-    stream->streamRepresentation.streamInfo.sampleRate    = sampleRate;
-    stream->streamRepresentation.streamInfo.inputLatency  = latency_in;  /* 0.0 if output only. */
-    stream->streamRepresentation.streamInfo.outputLatency = latency_out; /* 0.0 if input only.  */
-
-    PaUtil_InitializeCpuLoadMeasurer(&stream->cpuLoadMeasurer, sampleRate);
-    result = PaUtil_InitializeBufferProcessor(&stream->bufferProcessor,
-                    inputChannelCount,   inputSampleFormat,  hostInputSampleFormat,
-                    outputChannelCount,  outputSampleFormat, hostOutputSampleFormat,
-                    sampleRate,          streamFlags,
-                    framesPerBuffer,           /* As requested by OpenStream(), may be zero! */
-                    framesPerHostBuffer,       /* Use fixed number of frames per host buffer */
-                    paUtilFixedHostBufferSize, /* to keep things simple. See pa_common/pa_   */
-                    streamCallback, userData); /* process.h for more hostbuffersize options. */
-    if (result != paNoError)
-        goto cleanup;
-
-    stream->framesPerHostCallback = framesPerHostBuffer;
-    stream->streamFlags           = streamFlags;                  /* Remember priming request. */
-    stream->state                 = PA_SGI_STREAM_FLAG_STOPPED_;  /* After opening, the stream */
-    stream->stopAbort             = PA_SGI_REQ_CONT_;             /* is in the stopped state.  */
-    *s = (PaStream*)stream;         /* Pass object to caller. */
-cleanup:
-    if (result != paNoError)        /* Always set result when jumping to cleanup after failure. */
-        {
-        if (stream)
-            {
-            streamCleanupAndClose(stream); /* Frees i/o buffers and closes AL ports. */
-            PaUtil_FreeMemory(stream);
-            }
-        }
-    return result;
-}
-
-/** POSIX thread that performs the actual i/o and calls the client's callback,
-    spawned by StartStream().
-*/
-static void* PaSGIpthread(void *userData)
-{
-    PaSGIStream*              stream = (PaSGIStream*)userData;
-    int                       callbackResult = paContinue;
-    double                    nanosec_per_frame;
-    PaStreamCallbackTimeInfo  timeInfo = { 0, 0, 0 };
-
-    stream->state = PA_SGI_STREAM_FLAG_ACTIVE_;   /* Parent thread also sets active flag, but we 
-                                                     make no assumption about who does this first. */
-    nanosec_per_frame = 1000000000.0 / stream->streamRepresentation.streamInfo.sampleRate;
-    /*----------------------------------------------- OUTPUT PRIMING: -----------------------------*/
-    if (stream->hostPortBuffOut.port)              /* Somewhat less than AL queue size so the next */
-        {                                          /* output buffer will (probably) not block.     */
-        unsigned long frames_to_prime = (long)(0.5 + 
-                                        (stream->streamRepresentation.streamInfo.outputLatency
-                                         * stream->streamRepresentation.streamInfo.sampleRate));
-        if (stream->streamFlags & paPrimeOutputBuffersUsingStreamCallback)
-          {
-          PaStreamCallbackFlags cbflags = paPrimingOutput;
-          if (stream->hostPortBuffIn.port) /* Only set this flag in case of full duplex. */
-            cbflags |= paInputUnderflow;
-          DBUG(("Prime with client's callback: < %ld frames.\n", frames_to_prime));
-          while (frames_to_prime >= stream->framesPerHostCallback)  /* We will not do less (yet).  */
-            {                                                     /* TODO: Timestamps and CPU load */
-            PaUtil_BeginBufferProcessing(&stream->bufferProcessor,  /* measurement during priming. */
-                                         &timeInfo,
-                                         cbflags);             /* Pass underflow + priming flags.  */
-            if (stream->hostPortBuffIn.port)                   /* Does that provide client's call- */
-                PaUtil_SetNoInput(&stream->bufferProcessor);   /* back with silent inputbuffers?   */
-            
-            PaUtil_SetOutputFrameCount(&stream->bufferProcessor, 0);   /* 0=take host buffer size. */
-            PaUtil_SetInterleavedOutputChannels(&stream->bufferProcessor, 0,
-                                                 stream->hostPortBuffOut.buffer, 0);
-            callbackResult = paContinue;                            /* Call the client's callback. */
-            frames_to_prime -= PaUtil_EndBufferProcessing(&stream->bufferProcessor, &callbackResult);
-            if (callbackResult == paAbort)
-                {                                           /* What should we do in other cases    */
-                stream->stopAbort = PA_SGI_REQ_ABORT_;      /* where (callbackResult!=paContinue). */
-                break; /* Don't even output the samples just returned (also skip following while). */
-                }
-            else                                       /* Write interleaved samples to SGI device. */
-                alWriteFrames(stream->hostPortBuffOut.port, stream->hostPortBuffOut.buffer, 
-                              stream->framesPerHostCallback);
-            }
-          }
-        else /* Prime with silence.  */
-            {
-            DBUG(("Prime with silence: %ld frames.\n", frames_to_prime));
-            alZeroFrames(stream->hostPortBuffOut.port, frames_to_prime);
-            }
-        }
-    /*------------------------------------------------------ I/O: ---------------------------------*/
-    while (!stream->stopAbort)         /* Exit loop immediately when 'stop' or 'abort' are raised. */
-        {
-        unsigned long   framesProcessed;
-        stamp_t         fn, t, fnd, td;   /* Unsigned 64 bit. */
-        
-        PaUtil_BeginCpuLoadMeasurement( &stream->cpuLoadMeasurer );
-        /* IMPLEMENT ME: - handle buffer slips. */
-        if (stream->hostPortBuffIn.port)
-            {
-            /*  Get device sample frame number associated with next audio sample frame
-                we're going to read from this port. */
-            alGetFrameNumber(stream->hostPortBuffIn.port, &fn);
-            /*  Get some recent pair of (frame number, time) from the audio device to 
-                which our port is connected. time is 'UST' which is given in nanoseconds 
-                and shared with the other audio devices and with other media. */
-            alGetFrameTime(stream->hostPortBuffIn.port, &fnd, &td);
-            /*  Calculate UST associated with fn, the next sample frame we're going to read or
-                write. Because this is signed arithmetic, code works for both inputs and outputs. */
-            t = td + (stamp_t) ((double)(fn - fnd) * nanosec_per_frame);
-            /*  If port is not in underflow or overflow state, we can alReadFrames() or 
-                alWriteFrames() here and know that t is the time associated with the first 
-                sample frame of the buffer we read or write. */
-            timeInfo.inputBufferAdcTime = ((PaTime)t) / 1000000000.0;
-            /* Read interleaved samples from AL port (I think it will block only the first time). */
-            alReadFrames(stream->hostPortBuffIn.port, stream->hostPortBuffIn.buffer, 
-                         stream->framesPerHostCallback);
-            }
-        if (stream->hostPortBuffOut.port)
-            {
-            alGetFrameNumber(stream->hostPortBuffOut.port, &fn);
-            alGetFrameTime(stream->hostPortBuffOut.port, &fnd, &td);
-            t = td + (stamp_t) ((double)(fn - fnd) * nanosec_per_frame);
-            timeInfo.outputBufferDacTime = ((PaTime)t) / 1000000000.0;
-            }
-        dmGetUST((unsigned long long*)(&t));                /* Receive time in nanoseconds in t. */
-        timeInfo.currentTime = ((PaTime)t) / 1000000000.0;
-        
-        /* If you need to byte swap or shift inputBuffer to convert it into a pa format, do it here. */
-        PaUtil_BeginBufferProcessing(&stream->bufferProcessor,
-                                     &timeInfo,
-                                     0 /* IMPLEMENT ME: pass underflow/overflow flags when necessary */);
-                                     
-        if (stream->hostPortBuffIn.port)                    /* Equivalent to (inputChannelCount > 0) */
-            {                /* We are sure about the amount to transfer (PaUtil_Set before alRead). */
-            PaUtil_SetInputFrameCount(&stream->bufferProcessor, 0 /* 0 means take host buffer size */);
-            PaUtil_SetInterleavedInputChannels(&stream->bufferProcessor,
-                    0, /* first channel of inputBuffer is channel 0 */
-                    stream->hostPortBuffIn.buffer,
-                    0 ); /* 0 - use inputChannelCount passed to init buffer processor */
-            }
-        if (stream->hostPortBuffOut.port)
-            {
-            PaUtil_SetOutputFrameCount(&stream->bufferProcessor, 0 /* 0 means take host buffer size */);
-            PaUtil_SetInterleavedOutputChannels(&stream->bufferProcessor,
-                    0, /* first channel of outputBuffer is channel 0 */
-                    stream->hostPortBuffOut.buffer,
-                    0 ); /* 0 - use outputChannelCount passed to init buffer processor */
-            }
-        /*
-            You must pass a valid value of callback result to PaUtil_EndBufferProcessing()
-            in general you would pass paContinue for normal operation, and
-            paComplete to drain the buffer processor's internal output buffer.
-            You can check whether the buffer processor's output buffer is empty
-            using PaUtil_IsBufferProcessorOuputEmpty( bufferProcessor )
-        */
-        callbackResult = paContinue;      /* Whoops, lost this somewhere, back again in v 1.2.2.16! */
-        framesProcessed = PaUtil_EndBufferProcessing(&stream->bufferProcessor, &callbackResult);
-        /* If you need to byte swap or shift outputBuffer to convert it to host format, do it here. */
-        PaUtil_EndCpuLoadMeasurement( &stream->cpuLoadMeasurer, framesProcessed );
-        
-        if (callbackResult != paContinue)
-            {                                              /* Once finished, call the finished callback. */
-            DBUG(("SGI callbackResult = %d.\n", callbackResult));
-            if (stream->streamRepresentation.streamFinishedCallback)
-                stream->streamRepresentation.streamFinishedCallback(stream->streamRepresentation.userData);
-            if (callbackResult == paAbort)
-                {
-                stream->stopAbort = PA_SGI_REQ_ABORT_;
-                break;  /* Don't play the last buffer returned. */
-                }
-            else        /* paComplete or some other non-zero value. */
-                stream->stopAbort = PA_SGI_REQ_STOP_;
-            }
-        if (stream->hostPortBuffOut.port)                /* Write interleaved samples to SGI device */
-            alWriteFrames(stream->hostPortBuffOut.port,  /* (like unix_oss, AFTER checking callback result). */
-                          stream->hostPortBuffOut.buffer, stream->framesPerHostCallback);
-        }
-    if (stream->hostPortBuffOut.port) /* Drain output buffer(s), as long as we don't see an 'abort' request. */
-        {
-        while ((!(stream->stopAbort & PA_SGI_REQ_ABORT_)) &&    /* Assume _STOP_ is set (or meant). */
-               (alGetFilled(stream->hostPortBuffOut.port) > 1)) /* In case of ABORT we quickly leave (again). */
-            ; /* Don't provide any new (not even silent) samples, but let an underrun [almost] occur. */
-        }
-    if (callbackResult != paContinue)
-        stream->state = PA_SGI_STREAM_FLAG_FINISHED_;
-    return NULL;
-}
-
-
-/*
-    When CloseStream() is called, the multi-api layer ensures
-    that the stream has already been stopped or aborted.
-*/
-static PaError CloseStream(PaStream* s)
-{
-    PaError       result = paNoError;
-    PaSGIStream*  stream = (PaSGIStream*)s;
-
-    DBUG(("SGI CloseStream() started.\n"));
-    streamCleanupAndClose(stream); /* Releases i/o buffers and closes AL ports. */
-    PaUtil_TerminateBufferProcessor(&stream->bufferProcessor);
-    PaUtil_TerminateStreamRepresentation(&stream->streamRepresentation);
-    PaUtil_FreeMemory(stream);
-    return result;
-}
-
-
-static PaError StartStream(PaStream *s)
-{
-    PaError       result = paNoError;
-    PaSGIStream*  stream = (PaSGIStream*)s;
-
-    DBUG(("StartStream() started.\n"));
-    PaUtil_ResetBufferProcessor(&stream->bufferProcessor); /* See pa_common/pa_process.h. */
-    if (stream->bufferProcessor.streamCallback)
-        {                                       /* only when callback is used */
-        if (pthread_create(&stream->thread,
-                           NULL,                /* pthread_attr_t * attr */
-                           PaSGIpthread,        /* Function to spawn.    */
-                           (void*)stream))      /* Pass stream as arg.   */
-            {
-            PA_SGI_SET_LAST_IRIX_ERROR()        /* Let's hope oserror() tells something useful. */
-            result = paUnanticipatedHostError;
-            }
-        else
-            stream->state = PA_SGI_STREAM_FLAG_ACTIVE_;
-        }                   /* Set active before returning from this function. */
-    else
-        stream->state = PA_SGI_STREAM_FLAG_ACTIVE_; /* Apparently, setting active for blocking i/o is */
-    return result;                                  /* necessary (for patest_write_sine for example). */
-}
-
-
-static PaError StopStream( PaStream *s )
-{
-    PaError         result = paNoError;
-    PaSGIStream*    stream = (PaSGIStream*)s;
-    
-    if (stream->bufferProcessor.streamCallback) /* Only for callback streams. */
-        {
-        stream->stopAbort = PA_SGI_REQ_STOP_;   /* Signal and wait for the thread to drain outputs. */
-        if (pthread_join(stream->thread, NULL)) /* When succesful, stream->state */
-            {                                   /* is still ACTIVE, or FINISHED. */
-            PA_SGI_SET_LAST_IRIX_ERROR()
-            result = paUnanticipatedHostError;
-            }
-        else  /* Transition from ACTIVE or FINISHED to STOPPED. */
-            stream->state = PA_SGI_STREAM_FLAG_STOPPED_;
-        stream->stopAbort = PA_SGI_REQ_CONT_; /* For possible next start. */
-        }
-/*  else
-        stream->state = PA_SGI_STREAM_FLAG_STOPPED_;  Is this necessary for blocking i/o? */
-    return result;
-}
-
-
-static PaError AbortStream( PaStream *s )
-{
-    PaError result = paNoError;
-    PaSGIStream *stream = (PaSGIStream*)s;
-
-    if (stream->bufferProcessor.streamCallback) /* Only for callback streams. */
-        {
-        stream->stopAbort = PA_SGI_REQ_ABORT_;
-        if (pthread_join(stream->thread, NULL))
-            {
-            PA_SGI_SET_LAST_IRIX_ERROR()
-            result = paUnanticipatedHostError;
-            }
-        else  /* Transition from ACTIVE or FINISHED to STOPPED. */
-            stream->state = PA_SGI_STREAM_FLAG_STOPPED_;
-        stream->stopAbort = PA_SGI_REQ_CONT_; /* For possible next start. */
-        }
-/*  else
-        stream->state = PA_SGI_STREAM_FLAG_STOPPED_;  Is this necessary for blocking i/o? */
-    return result;
-}
-
-
-static PaError IsStreamStopped( PaStream *s )   /* Not just the opposite of IsStreamActive(): */
-{                                               /* in the 'callback finished' state, it       */
-                                                /* returns zero instead of nonzero.           */
-    if (((PaSGIStream*)s)->state & PA_SGI_STREAM_FLAG_STOPPED_)
-        return 1;
-    return 0;
-}
-
-
-static PaError IsStreamActive( PaStream *s )
-{
-    if (((PaSGIStream*)s)->state & PA_SGI_STREAM_FLAG_ACTIVE_)
-        return 1;
-    return 0;
-}
-
-
-static PaTime GetStreamTime( PaStream *s )
-{
-    stamp_t t;
-    
-    (void) s; /* Suppress unused argument warning. */
-    dmGetUST((unsigned long long*)(&t)); /* Receive time in nanoseconds in t. */
-    return (PaTime)t / 1000000000.0;
-}
-
-
-static double GetStreamCpuLoad( PaStream* s )
-{
-    PaSGIStream *stream = (PaSGIStream*)s;
-
-    return PaUtil_GetCpuLoad( &stream->cpuLoadMeasurer );
-}
-
-
-/*
-    As separate stream interfaces are used for blocking and callback
-    streams, the following functions can be guaranteed to only be called
-    for blocking streams.
-*/
-
-static PaError ReadStream( PaStream* s,
-                           void *buffer,
-                           unsigned long frames )
-{
-    PaSGIStream*    stream = (PaSGIStream*)s;
-    int             n;
-
-printf("stream->framesPerHostCallback=%ld.\n", stream->framesPerHostCallback);
-fflush(stdout);
-
-    while (frames)
-        {
-        if (frames > stream->framesPerHostCallback) n = stream->framesPerHostCallback;
-        else                                        n = frames;
-        /* Read interleaved samples from SGI device. */
-        alReadFrames(stream->hostPortBuffIn.port,           /* Port already opened by OpenStream(). */
-                     stream->hostPortBuffIn.buffer, n);     /* Already allocated by OpenStream().   */
-                                                            /* alReadFrames() always returns 0.     */
-        PaUtil_SetInputFrameCount(&stream->bufferProcessor, 0); /* 0 means take host buffer size */
-        PaUtil_SetInterleavedInputChannels(&stream->bufferProcessor,
-                                           0,   /* first channel of inputBuffer is channel 0 */
-                                           stream->hostPortBuffIn.buffer,
-                                           0 ); /* 0 means use inputChannelCount passed at init. */
-        /* Copy samples from host input channels set up by the PaUtil_SetInterleavedInputChannels 
-           to a user supplied buffer. */
-printf("frames=%ld, buffer=%ld\n", frames, (long)buffer);
-fflush(stdout);
-        PaUtil_CopyInput(&stream->bufferProcessor, &buffer, n);
-        frames -= n;
-        }
-printf("DONE: frames=%ld, buffer=%ld\n", frames, (long)buffer);
-    return paNoError;
-}
-
-
-static PaError WriteStream( PaStream* s,
-                            const void *buffer,
-                            unsigned long frames )
-{
-    PaSGIStream*    stream = (PaSGIStream*)s;
-    unsigned long   n;
-    while (frames)
-        {
-        PaUtil_SetOutputFrameCount(&stream->bufferProcessor, 0); /* 0 means take host buffer size */
-        PaUtil_SetInterleavedOutputChannels(&stream->bufferProcessor,
-                                            0,   /* first channel of inputBuffer is channel 0 */
-                                            stream->hostPortBuffOut.buffer,
-                                            0 ); /* 0 means use inputChannelCount passed at init. */
-        /* Copy samples from user supplied buffer to host input channels set up by
-           PaUtil_SetInterleavedOutputChannels. Copies the minimum of the number of user frames 
-           (specified by the frameCount parameter) and the number of host frames (specified in 
-           a previous call to SetOutputFrameCount()). */
-        n = PaUtil_CopyOutput(&stream->bufferProcessor, &buffer, frames);
-        /* Write interleaved samples to SGI device. */
-        alWriteFrames(stream->hostPortBuffOut.port, stream->hostPortBuffOut.buffer, n);
-        frames -= n;                                           /* alWriteFrames always returns 0. */
-        }
-    return paNoError;
-}
-
-
-static signed long GetStreamReadAvailable( PaStream* s )
-{
-    return (signed long)alGetFilled(((PaSGIStream*)s)->hostPortBuffIn.port);
-}
-
-
-static signed long GetStreamWriteAvailable( PaStream* s )
-{
-    return (signed long)alGetFillable(((PaSGIStream*)s)->hostPortBuffOut.port);
-}
-
-
-/* CVS reminder:
-   To download the 'v19-devel' branch from portaudio's CVS server for the first time, type:
-    cvs -d:pserver:anonymous@www.portaudio.com:/home/cvs checkout -r v19-devel portaudio
-   Then 'cd' to the 'portaudio' directory that should have been created.
-   To commit changes:
-    cvs -d:pserver:pieter@www.portaudio.com:/home/cvs login
-    cvs -d:pserver:pieter@www.portaudio.com:/home/cvs commit -m 'blabla.' -r v19-devel pa_sgi/pa_sgi.c
-    cvs -d:pserver:pieter@www.portaudio.com:/home/cvs logout
-   To see if someone else worked on something:
-    cvs -d:pserver:anonymous@www.portaudio.com:/home/cvs update -r v19-devel
-   To get an older revision of a certain file (without sticky business):
-    cvs -d:pserver:anonymous@www.portaudio.com:/home/cvs update -p -r 1.1.1.1.2.4 pa_tests/patest1.c >pa_tests/patest1.c-OLD
-   To see logs:
-    cvs -d:pserver:anonymous@www.portaudio.com:/home/cvs log pa_common/pa_skeleton.c
-*/