From 4f6f0405e6cd9ca3ebea1eb37be441b7037c4cf7 Mon Sep 17 00:00:00 2001 From: fedor Date: Mon, 21 Mar 2005 16:22:11 +0000 Subject: [PATCH] * Tools/gsnd/portaudio/pa_unix_oss/pa_unix_oss.c: Fix for FreeBSD FTBFS (Fixes Bug #12316). Strip DOS LFs. git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@20937 72102866-910b-0410-8b05-ffd578937521 --- ChangeLog | 5 + .../gsnd/portaudio/pa_unix_oss/pa_unix_oss.c | 2776 ++++++++--------- 2 files changed, 1392 insertions(+), 1389 deletions(-) diff --git a/ChangeLog b/ChangeLog index 9428ec0a6..18565d7c0 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2005-03-21 Adam Fedor + + * Tools/gsnd/portaudio/pa_unix_oss/pa_unix_oss.c: Fix for FreeBSD + FTBFS (Fixes Bug #12316). Strip DOS LFs. + 2005-03-21 Adam Fedor * configure.ac: Check for libgif diff --git a/Tools/gsnd/portaudio/pa_unix_oss/pa_unix_oss.c b/Tools/gsnd/portaudio/pa_unix_oss/pa_unix_oss.c index 436d75e99..24414f444 100644 --- a/Tools/gsnd/portaudio/pa_unix_oss/pa_unix_oss.c +++ b/Tools/gsnd/portaudio/pa_unix_oss/pa_unix_oss.c @@ -1,1389 +1,1387 @@ -/* - * PortAudio Portable Real-Time Audio Library - * Latest Version at: http://www.portaudio.com - * Linux OSS Implementation by douglas repetto and Phil Burk - * - * Copyright (c) 1999-2000 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. - * - */ -/* -Modfication History - 1/2001 - Phil Burk - initial hack for Linux - 2/2001 - Douglas Repetto - many improvements, initial query support - 4/2/2001 - Phil - stop/abort thread control, separate in/out native buffers - 5/28/2001 - Phil - use pthread_create() instead of clone(). Thanks Stephen Brandon! - use pthread_join() after thread shutdown. - 5/29/2001 - Phil - query for multiple devices, multiple formats, - input mode and input+output mode working, - Pa_GetCPULoad() implemented. - PLB20010817 - Phil & Janos Haber - don't halt if test of sample rate fails. - SB20010904 - Stephen Brandon - mods needed for GNUSTEP and SndKit - JH20010905 - Janos Haber - FreeBSD mods - 2001-09-22 - Heiko - (i.e. Heiko Purnhagen ;-) - added 24k and 16k to ratesToTry[] - fixed Pa_GetInternalDevice() - changed DEVICE_NAME_BASE from /dev/audio to /dev/dsp - handled SNDCTL_DSP_SPEED in Pq_QueryDevice() more graceful - fixed Pa_StreamTime() for paqa_errs.c - fixed numCannel=2 oddity and error handling in Pa_SetupDeviceFormat() - grep also for HP20010922 ... - PLB20010924 - Phil - merged Heiko's changes - removed sNumDevices and potential related bugs, - use getenv("PA_MIN_LATENCY_MSEC") to set desired latency, - simplify CPU Load calculation by comparing real-time to framesPerBuffer, - always close device when querying even if error occurs, - PLB20010927 - Phil - Improved negotiation for numChannels. - SG20011005 - Stewart Greenhill - set numChannels back to reasonable value after query. - DH20010115 - David Herring - fixed uninitialized handle. - - DM20020218 - Dominic Mazzoni - Try to open in nonblocking mode first, in case - the device is already open. New implementation of - Pa_StreamTime that uses SNDCTL_DSP_GETOPTR but - uses our own counter to avoid wraparound. - PLB20020222 - Phil Burk - Added WatchDog proc if audio running at high priority. - Check error return from read() and write(). - Check CPU endianness instead of assuming Little Endian. - -TODO -O- put semaphore lock around shared data? -O- handle native formats better -O- handle stereo-only device better ??? -O- what if input and output of a device capabilities differ (e.g. es1371) ??? -*/ -/* - PROPOSED - should we add this to "portaudio.h". Problem with - Pa_QueryDevice() not having same driver name os Pa_OpenStream(). - - A PaDriverInfo structure can be passed to the underlying device - on the Pa_OpenStream() call. The contents and interpretation of - the structure is determined by the PA implementation. -*/ -typedef struct PaDriverInfo /* PROPOSED */ -{ - /* Size of structure. Allows driver to extend the structure without breaking existing applications. */ - int size; - /* Can be used to request a specific device name. */ - const char *name; - unsigned long data; -} -PaDriverInfo; - - - -#include -#include -#ifndef __FreeBSD__ -#include -#endif -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef __linux__ -#include -#else -#ifdef __FreeBSD__ -#include -#else -#ifdef __OpenBSD__ -#include -#else -#include /* JH20010905 */ -#endif -#endif -#endif - -#include "portaudio.h" -#include "pa_host.h" -#include "pa_trace.h" - -#define PRINT(x) { printf x; fflush(stdout); } -#define ERR_RPT(x) PRINT(x) -#define DBUG(x) /* PRINT(x) */ -#define DBUGX(x) /* PRINT(x) */ - -#define BAD_DEVICE_ID (-1) - -#define MIN_LATENCY_MSEC (100) -#define MIN_TIMEOUT_MSEC (100) -#define MAX_TIMEOUT_MSEC (1000) - -/************************************************* Definitions ********/ -#ifdef __linux__ - #define DEVICE_NAME_BASE "/dev/dsp" -#else - #define DEVICE_NAME_BASE "/dev/audio" -#endif - -/* What is a pthread_t anyway? Here is a guess at a value that will never happen in real life. */ -#define INVALID_THREAD (-1) - -#define MAX_CHARS_DEVNAME (32) -#define MAX_SAMPLE_RATES (10) -typedef struct internalPortAudioDevice -{ - struct internalPortAudioDevice *pad_Next; /* Singly linked list. */ - double pad_SampleRates[MAX_SAMPLE_RATES]; /* for pointing to from pad_Info */ - char pad_DeviceName[MAX_CHARS_DEVNAME]; - PaDeviceInfo pad_Info; -} -internalPortAudioDevice; - -/* Define structure to contain all OSS and Linux specific data. */ -typedef struct PaHostSoundControl -{ - int pahsc_OutputHandle; - int pahsc_InputHandle; - int pahsc_AudioPriority; /* priority of background audio thread */ - pthread_t pahsc_AudioThread; /* background audio thread */ - pid_t pahsc_AudioThreadPID; /* background audio thread */ - pthread_t pahsc_WatchDogThread; /* highest priority thread that protects system */ - int pahsc_WatchDogRun; /* Ask WatchDog to stop. */ - pthread_t pahsc_CanaryThread; /* low priority thread that detects abuse by audio */ - struct timeval pahsc_CanaryTime; - int pahsc_CanaryRun; /* Ask Canary to stop. */ - short *pahsc_NativeInputBuffer; - short *pahsc_NativeOutputBuffer; - unsigned int pahsc_BytesPerInputBuffer; /* native buffer size in bytes */ - unsigned int pahsc_BytesPerOutputBuffer; /* native buffer size in bytes */ - /* For measuring CPU utilization. */ - struct timeval pahsc_EntryTime; - double pahsc_InverseMicrosPerBuffer; /* 1/Microseconds of real-time audio per user buffer. */ - - /* For calculating stream time */ - int pahsc_LastPosPtr; - double pahsc_LastStreamBytes; -} -PaHostSoundControl; - -/************************************************* Shared Data ********/ -/* FIXME - put Mutex around this shared data. */ -static internalPortAudioDevice *sDeviceList = NULL; -static int sDefaultInputDeviceID = paNoDevice; -static int sDefaultOutputDeviceID = paNoDevice; -static int sPaHostError = 0; - -/************************************************* Prototypes **********/ - -static internalPortAudioDevice *Pa_GetInternalDevice( PaDeviceID id ); -static PaError Pa_QueryDevices( void ); -static PaError Pa_QueryDevice( const char *deviceName, internalPortAudioDevice *pad ); -static PaError Pa_SetupDeviceFormat( int devHandle, int numChannels, int sampleRate ); - -/********************************* BEGIN CPU UTILIZATION MEASUREMENT ****/ -static void Pa_StartUsageCalculation( internalPortAudioStream *past ) -{ - PaHostSoundControl *pahsc = (PaHostSoundControl *) past->past_DeviceData; - if( pahsc == NULL ) return; - /* Query system timer for usage analysis and to prevent overuse of CPU. */ - gettimeofday( &pahsc->pahsc_EntryTime, NULL ); -} - -static long SubtractTime_AminusB( struct timeval *timeA, struct timeval *timeB ) -{ - long secs = timeA->tv_sec - timeB->tv_sec; - long usecs = secs * 1000000; - usecs += (timeA->tv_usec - timeB->tv_usec); - return usecs; -} - -/****************************************************************************** -** Measure fractional CPU load based on real-time it took to calculate -** buffers worth of output. -*/ -static void Pa_EndUsageCalculation( internalPortAudioStream *past ) -{ - struct timeval currentTime; - long usecsElapsed; - double newUsage; - -#define LOWPASS_COEFFICIENT_0 (0.95) -#define LOWPASS_COEFFICIENT_1 (0.99999 - LOWPASS_COEFFICIENT_0) - - PaHostSoundControl *pahsc = (PaHostSoundControl *) past->past_DeviceData; - if( pahsc == NULL ) return; - - if( gettimeofday( ¤tTime, NULL ) == 0 ) - { - usecsElapsed = SubtractTime_AminusB( ¤tTime, &pahsc->pahsc_EntryTime ); - /* Use inverse because it is faster than the divide. */ - newUsage = usecsElapsed * pahsc->pahsc_InverseMicrosPerBuffer; - - past->past_Usage = (LOWPASS_COEFFICIENT_0 * past->past_Usage) + - (LOWPASS_COEFFICIENT_1 * newUsage); - } -} -/****************************************** END CPU UTILIZATION *******/ - -#ifndef AFMT_S16_NE -#define AFMT_S16_NE Get_AFMT_S16_NE() -/********************************************************************* - * Some versions of OSS do not define AFMT_S16_NE. So check CPU. - * PowerPC is Big Endian. X86 is Little Endian. - */ -static int Get_AFMT_S16_NE( void ) -{ - long testData = 1; - char *ptr = (char *) &testData; - int isLittle = ( *ptr == 1 ); /* Does address point to least significant byte? */ - return isLittle ? AFMT_S16_LE : AFMT_S16_BE; -} -#endif - -/********************************************************************* - * Try to open the named device. - * If it opens, try to set various rates and formats and fill in - * the device info structure. - */ -static PaError Pa_QueryDevice( const char *deviceName, internalPortAudioDevice *pad ) -{ - int result = paHostError; - int tempDevHandle; - int numChannels, maxNumChannels; - int format; - int numSampleRates; - int sampleRate; - int numRatesToTry; - int ratesToTry[9] = {96000, 48000, 44100, 32000, 24000, 22050, 16000, 11025, 8000}; - int i; - - /* douglas: - we have to do this querying in a slightly different order. apparently - some sound cards will give you different info based on their settins. - e.g. a card might give you stereo at 22kHz but only mono at 44kHz. - the correct order for OSS is: format, channels, sample rate - - */ - if ( (tempDevHandle = open(deviceName,O_WRONLY|O_NONBLOCK)) == -1 ) - { - DBUG(("Pa_QueryDevice: could not open %s\n", deviceName )); - return paHostError; - } - - /* Ask OSS what formats are supported by the hardware. */ - pad->pad_Info.nativeSampleFormats = 0; - if (ioctl(tempDevHandle, SNDCTL_DSP_GETFMTS, &format) == -1) - { - ERR_RPT(("Pa_QueryDevice: could not get format info\n" )); - goto error; - } - if( format & AFMT_U8 ) pad->pad_Info.nativeSampleFormats |= paUInt8; - if( format & AFMT_S16_NE ) pad->pad_Info.nativeSampleFormats |= paInt16; - - /* Negotiate for the maximum number of channels for this device. PLB20010927 - * Consider up to 16 as the upper number of channels. - * Variable numChannels should contain the actual upper limit after the call. - * Thanks to John Lazzaro and Heiko Purnhagen for suggestions. - */ - maxNumChannels = 0; - for( numChannels = 1; numChannels <= 16; numChannels++ ) - { - int temp = numChannels; - DBUG(("Pa_QueryDevice: use SNDCTL_DSP_CHANNELS, numChannels = %d\n", numChannels )) - if(ioctl(tempDevHandle, SNDCTL_DSP_CHANNELS, &temp) < 0 ) - { - /* ioctl() failed so bail out if we already have stereo */ - if( numChannels > 2 ) break; - } - else - { - /* ioctl() worked but bail out if it does not support numChannels. - * We don't want to leave gaps in the numChannels supported. - */ - if( (numChannels > 2) && (temp != numChannels) ) break; - DBUG(("Pa_QueryDevice: temp = %d\n", temp )) - if( temp > maxNumChannels ) maxNumChannels = temp; /* Save maximum. */ - } - } - - /* The above negotiation may fail for an old driver so try this older technique. */ - if( maxNumChannels < 1 ) - { - int stereo = 1; - if(ioctl(tempDevHandle, SNDCTL_DSP_STEREO, &stereo) < 0) - { - maxNumChannels = 1; - } - else - { - maxNumChannels = (stereo) ? 2 : 1; - } - DBUG(("Pa_QueryDevice: use SNDCTL_DSP_STEREO, maxNumChannels = %d\n", maxNumChannels )) - } - - pad->pad_Info.maxOutputChannels = maxNumChannels; - DBUG(("Pa_QueryDevice: maxNumChannels = %d\n", maxNumChannels)) - - /* During channel negotiation, the last ioctl() may have failed. This can - * also cause sample rate negotiation to fail. Hence the following, to return - * to a supported number of channels. SG20011005 */ - { - int temp = maxNumChannels; - if( temp > 2 ) temp = 2; /* use most reasonable default value */ - ioctl(tempDevHandle, SNDCTL_DSP_CHANNELS, &temp); - } - - /* FIXME - for now, assume maxInputChannels = maxOutputChannels. - * Eventually do separate queries for O_WRONLY and O_RDONLY - */ - pad->pad_Info.maxInputChannels = pad->pad_Info.maxOutputChannels; - - DBUG(("Pa_QueryDevice: maxInputChannels = %d\n", - pad->pad_Info.maxInputChannels)) - - - /* Determine available sample rates by trying each one and seeing result. - */ - numSampleRates = 0; - numRatesToTry = sizeof(ratesToTry)/sizeof(int); - for (i = 0; i < numRatesToTry; i++) - { - sampleRate = ratesToTry[i]; - - if (ioctl(tempDevHandle, SNDCTL_DSP_SPEED, &sampleRate) >= 0 ) /* PLB20010817 */ - { - if (sampleRate == ratesToTry[i]) - { - DBUG(("Pa_QueryDevice: got sample rate: %d\n", sampleRate)) - pad->pad_SampleRates[numSampleRates] = (float)ratesToTry[i]; - numSampleRates++; - } - } - } - - DBUG(("Pa_QueryDevice: final numSampleRates = %d\n", numSampleRates)) - if (numSampleRates==0) /* HP20010922 */ - { - ERR_RPT(("Pa_QueryDevice: no supported sample rate (or SNDCTL_DSP_SPEED ioctl call failed).\n" )); - goto error; - } - - pad->pad_Info.numSampleRates = numSampleRates; - pad->pad_Info.sampleRates = pad->pad_SampleRates; - - pad->pad_Info.name = deviceName; - - result = paNoError; - -error: - /* We MUST close the handle here or we won't be able to reopen it later!!! */ - close(tempDevHandle); - - return result; -} - -/********************************************************************* - * Determines the number of available devices by trying to open - * each "/dev/dsp#" or "/dsp/audio#" in order until it fails. - * Add each working device to a singly linked list of devices. - */ -static PaError Pa_QueryDevices( void ) -{ - internalPortAudioDevice *pad, *lastPad; - int go = 1; - int numDevices = 0; - PaError testResult; - PaError result = paNoError; - - sDefaultInputDeviceID = paNoDevice; - sDefaultOutputDeviceID = paNoDevice; - - lastPad = NULL; - - while( go ) - { - /* Allocate structure to hold device info. */ - pad = PaHost_AllocateFastMemory( sizeof(internalPortAudioDevice) ); - if( pad == NULL ) return paInsufficientMemory; - memset( pad, 0, sizeof(internalPortAudioDevice) ); - - /* Build name for device. */ - if( numDevices == 0 ) - { - sprintf( pad->pad_DeviceName, DEVICE_NAME_BASE); - } - else - { - sprintf( pad->pad_DeviceName, DEVICE_NAME_BASE "%d", numDevices ); - } - - DBUG(("Try device %s\n", pad->pad_DeviceName )); - testResult = Pa_QueryDevice( pad->pad_DeviceName, pad ); - DBUG(("Pa_QueryDevice returned %d\n", testResult )); - if( testResult != paNoError ) - { - if( lastPad == NULL ) - { - result = testResult; /* No good devices! */ - } - go = 0; - PaHost_FreeFastMemory( pad, sizeof(internalPortAudioDevice) ); - } - else - { - numDevices += 1; - /* Add to linked list of devices. */ - if( lastPad ) - { - lastPad->pad_Next = pad; - } - else - { - sDeviceList = pad; /* First element in linked list. */ - } - lastPad = pad; - } - } - - return result; - -} - -/*************************************************************************/ -int Pa_CountDevices() -{ - int numDevices = 0; - internalPortAudioDevice *pad; - - if( sDeviceList == NULL ) Pa_Initialize(); - /* Count devices in list. */ - pad = sDeviceList; - while( pad != NULL ) - { - pad = pad->pad_Next; - numDevices++; - } - - return numDevices; -} - -/*************************************************************************/ -static internalPortAudioDevice *Pa_GetInternalDevice( PaDeviceID id ) -{ - internalPortAudioDevice *pad; - if( (id < 0) || ( id >= Pa_CountDevices()) ) return NULL; - pad = sDeviceList; - while( id > 0 ) - { - pad = pad->pad_Next; - id--; - } - return pad; -} - -/*************************************************************************/ -const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceID id ) -{ - internalPortAudioDevice *pad; - if( (id < 0) || ( id >= Pa_CountDevices()) ) return NULL; - pad = Pa_GetInternalDevice( id ); - return &pad->pad_Info ; -} - -static PaError Pa_MaybeQueryDevices( void ) -{ - if( sDeviceList == NULL ) - { - return Pa_QueryDevices(); - } - return 0; -} - -PaDeviceID Pa_GetDefaultInputDeviceID( void ) -{ - /* return paNoDevice; */ - return 0; -} - -PaDeviceID Pa_GetDefaultOutputDeviceID( void ) -{ - return 0; -} - -/********************************************************************** -** Make sure that we have queried the device capabilities. -*/ - -PaError PaHost_Init( void ) -{ - return Pa_MaybeQueryDevices(); -} - -/******************************************************************************************* - * The ol' Canary in a Coal Mine trick. - * Just update the time periodically. - * Runs at low priority so if audio thread runs wild, this thread will get starved - * and the watchdog will detect it. - */ - -#define SCHEDULER_POLICY SCHED_RR -#define WATCHDOG_MAX_SECONDS (3) -#define WATCHDOG_INTERVAL_USEC (1000000) - -static int PaHost_CanaryProc( PaHostSoundControl *pahsc ) -{ - int result = 0; - -#ifdef GNUSTEP - GSRegisterCurrentThread(); /* SB20010904 */ -#endif - - while( pahsc->pahsc_CanaryRun) - { - usleep( WATCHDOG_INTERVAL_USEC ); - gettimeofday( &pahsc->pahsc_CanaryTime, NULL ); - } - - DBUG(("PaHost_CanaryProc: exiting.\n")); - -#ifdef GNUSTEP - GSUnregisterCurrentThread(); /* SB20010904 */ -#endif - - return result; -} - -/******************************************************************************************* - * Monitor audio thread and lower its it if it hogs the CPU. - * To prevent getting killed, the audio thread must update a - * variable with a timer value. - * If the value is not recent enough, then the - * thread will get killed. - */ - -static PaError PaHost_WatchDogProc( PaHostSoundControl *pahsc ) -{ - PaError result = 0; - struct sched_param schp = { 0 }; - int maxPri; - -#ifdef GNUSTEP - GSRegisterCurrentThread(); /* SB20010904 */ -#endif - -/* Run at a priority level above audio thread so we can still run if it hangs. */ -/* Rise more than 1 because of rumored off-by-one scheduler bugs. */ - schp.sched_priority = pahsc->pahsc_AudioPriority + 4; - maxPri = sched_get_priority_max(SCHEDULER_POLICY); - if( schp.sched_priority > maxPri ) schp.sched_priority = maxPri; - - if (sched_setscheduler(0, SCHEDULER_POLICY, &schp) != 0) - { - ERR_RPT(("PaHost_WatchDogProc: cannot set watch dog priority!\n")); - goto killAudio; - } - - /* Compare watchdog time with audio and canary thread times. */ - /* Sleep for a while or until thread cancelled. */ - while( pahsc->pahsc_WatchDogRun) - { - int delta; - struct timeval currentTime; - - usleep( WATCHDOG_INTERVAL_USEC ); - gettimeofday( ¤tTime, NULL ); - - /* If audio thread is not advancing, then lower its priority. */ - delta = currentTime.tv_sec - pahsc->pahsc_EntryTime.tv_sec; - DBUG(("PaHost_WatchDogProc: audio delta = %d\n", delta )); - if( delta > WATCHDOG_MAX_SECONDS ) - { - goto killAudio; - } - - /* If canary died, then kill audio and canary. */ - delta = currentTime.tv_sec - pahsc->pahsc_CanaryTime.tv_sec; - if( delta > WATCHDOG_MAX_SECONDS ) - { - ERR_RPT(("PaHost_WatchDogProc: canary died!\n")); - goto lowerAudio; - } - } - - DBUG(("PaHost_WatchDogProc: exiting.\n")); -#ifdef GNUSTEP - GSUnregisterCurrentThread(); /* SB20010904 */ -#endif - return 0; - -lowerAudio: - { - struct sched_param schat = { 0 }; - if( sched_setscheduler(pahsc->pahsc_AudioThreadPID, SCHED_OTHER, &schat) != 0) - { - ERR_RPT(("PaHost_WatchDogProc: failed to lower audio priority. errno = %d\n", errno )); - /* Fall through into killing audio thread. */ - } - else - { - ERR_RPT(("PaHost_WatchDogProc: lowered audio priority to prevent hogging of CPU.\n")); - goto cleanup; - } - } - -killAudio: - ERR_RPT(("PaHost_WatchDogProc: killing hung audio thread!\n")); - pthread_kill( pahsc->pahsc_AudioThread, SIGKILL ); - -cleanup: - pahsc->pahsc_CanaryRun = 0; - DBUG(("PaHost_WatchDogProc: cancel Canary\n")); - pthread_cancel( pahsc->pahsc_CanaryThread ); - DBUG(("PaHost_WatchDogProc: join Canary\n")); - pthread_join( pahsc->pahsc_CanaryThread, NULL ); - DBUG(("PaHost_WatchDogProc: forget Canary\n")); - pahsc->pahsc_CanaryThread = INVALID_THREAD; - -#ifdef GNUSTEP - GSUnregisterCurrentThread(); /* SB20010904 */ -#endif - return 0; -} - -/*******************************************************************************************/ -static void PaHost_StopWatchDog( PaHostSoundControl *pahsc ) -{ -/* Cancel WatchDog thread if there is one. */ - if( pahsc->pahsc_WatchDogThread != INVALID_THREAD ) - { - pahsc->pahsc_WatchDogRun = 0; - DBUG(("PaHost_StopWatchDog: cancel WatchDog\n")); - pthread_cancel( pahsc->pahsc_WatchDogThread ); - pthread_join( pahsc->pahsc_WatchDogThread, NULL ); - pahsc->pahsc_WatchDogThread = INVALID_THREAD; - } -/* Cancel Canary thread if there is one. */ - if( pahsc->pahsc_CanaryThread != INVALID_THREAD ) - { - pahsc->pahsc_CanaryRun = 0; - DBUG(("PaHost_StopWatchDog: cancel Canary\n")); - pthread_cancel( pahsc->pahsc_CanaryThread ); - DBUG(("PaHost_StopWatchDog: join Canary\n")); - pthread_join( pahsc->pahsc_CanaryThread, NULL ); - pahsc->pahsc_CanaryThread = INVALID_THREAD; - } -} - -/*******************************************************************************************/ -static PaError PaHost_StartWatchDog( PaHostSoundControl *pahsc ) -{ - int hres; - PaError result = 0; - - /* The watch dog watches for these timer updates */ - gettimeofday( &pahsc->pahsc_EntryTime, NULL ); - gettimeofday( &pahsc->pahsc_CanaryTime, NULL ); - - /* Launch a canary thread to detect priority abuse. */ - pahsc->pahsc_CanaryRun = 1; - hres = pthread_create(&(pahsc->pahsc_CanaryThread), - NULL /*pthread_attr_t * attr*/, - (void*)PaHost_CanaryProc, pahsc); - if( hres != 0 ) - { - pahsc->pahsc_CanaryThread = INVALID_THREAD; - result = paHostError; - sPaHostError = hres; - goto error; - } - - /* Launch a watchdog thread to prevent runaway audio thread. */ - pahsc->pahsc_WatchDogRun = 1; - hres = pthread_create(&(pahsc->pahsc_WatchDogThread), - NULL /*pthread_attr_t * attr*/, - (void*)PaHost_WatchDogProc, pahsc); - if( hres != 0 ) - { - pahsc->pahsc_WatchDogThread = INVALID_THREAD; - result = paHostError; - sPaHostError = hres; - goto error; - } - return result; - -error: - PaHost_StopWatchDog( pahsc ); - return result; -} - -/******************************************************************************************* - * Bump priority of audio thread if running with superuser priveledges. - * if priority bumped then launch a watchdog. - */ -static PaError PaHost_BoostPriority( internalPortAudioStream *past ) -{ - PaHostSoundControl *pahsc; - PaError result = paNoError; - struct sched_param schp = { 0 }; - - pahsc = (PaHostSoundControl *) past->past_DeviceData; - if( pahsc == NULL ) return paInternalError; - - pahsc->pahsc_AudioThreadPID = getpid(); - DBUG(("PaHost_BoostPriority: audio PID = %d\n", pahsc->pahsc_AudioThreadPID )); - - /* Choose a priority in the middle of the range. */ - pahsc->pahsc_AudioPriority = (sched_get_priority_max(SCHEDULER_POLICY) - - sched_get_priority_min(SCHEDULER_POLICY)) / 2; - schp.sched_priority = pahsc->pahsc_AudioPriority; - - if (sched_setscheduler(0, SCHEDULER_POLICY, &schp) != 0) - { - PRINT(("PortAudio: only superuser can use real-time priority.\n")); - } - else - { - PRINT(("PortAudio: audio callback priority set to level %d!\n", schp.sched_priority)); - /* We are running at high priority so we should have a watchdog in case audio goes wild. */ - result = PaHost_StartWatchDog( pahsc ); - } - - return result; -} - -/*******************************************************************************************/ -static PaError Pa_AudioThreadProc( internalPortAudioStream *past ) -{ - PaError result; - PaHostSoundControl *pahsc; - ssize_t bytes_read, bytes_written; - count_info info; - int delta; - - pahsc = (PaHostSoundControl *) past->past_DeviceData; - if( pahsc == NULL ) return paInternalError; - -#ifdef GNUSTEP - GSRegisterCurrentThread(); /* SB20010904 */ -#endif - - result = PaHost_BoostPriority( past ); - if( result < 0 ) goto error; - - past->past_IsActive = 1; - DBUG(("entering thread.\n")); - - while( (past->past_StopNow == 0) && (past->past_StopSoon == 0) ) - { - /* Read data from device */ - if(pahsc->pahsc_NativeInputBuffer) - { - DBUG(("Pa_AudioThreadProc: attempt to read %d bytes\n", pahsc->pahsc_BytesPerInputBuffer)); - bytes_read = read(pahsc->pahsc_InputHandle, - (void *)pahsc->pahsc_NativeInputBuffer, - pahsc->pahsc_BytesPerInputBuffer); - DBUG(("Pa_AudioThreadProc: bytes_read = %d\n", bytes_read)); - if( bytes_read < pahsc->pahsc_BytesPerInputBuffer ) - { - ERR_RPT(("PortAudio: read interrupted! Only got %d bytes.\n", bytes_read )); - break; - } - } - - /* Convert 16 bit native data to user data and call user routine. */ - DBUG(("converting...\n")); - Pa_StartUsageCalculation( past ); - result = Pa_CallConvertInt16( past, - pahsc->pahsc_NativeInputBuffer, - pahsc->pahsc_NativeOutputBuffer ); - Pa_EndUsageCalculation( past ); - if( result != 0) - { - DBUG(("hmm, Pa_CallConvertInt16() says: %d. i'm bailing.\n", - result)); - break; - } - - /* Write data to device. */ - if( pahsc->pahsc_NativeOutputBuffer ) - { - - bytes_written = write(pahsc->pahsc_OutputHandle, - (void *)pahsc->pahsc_NativeOutputBuffer, - pahsc->pahsc_BytesPerOutputBuffer); - if( bytes_written < pahsc->pahsc_BytesPerOutputBuffer ) - { - ERR_RPT(("PortAudio: write interrupted! Only got %d bytes.\n", bytes_written )); - break; - } - } - - /* Update current stream time (using a double so that - we don't wrap around like info.bytes does) */ - if( pahsc->pahsc_NativeOutputBuffer ) - ioctl(pahsc->pahsc_OutputHandle, SNDCTL_DSP_GETOPTR, &info); - else - ioctl(pahsc->pahsc_InputHandle, SNDCTL_DSP_GETIPTR, &info); - delta = (info.bytes - pahsc->pahsc_LastPosPtr) & 0x000FFFFF; - pahsc->pahsc_LastStreamBytes += delta; - pahsc->pahsc_LastPosPtr = info.bytes; - } - DBUG(("Pa_AudioThreadProc: left audio loop.\n")); - - past->past_IsActive = 0; - PaHost_StopWatchDog( pahsc ); - -error: - DBUG(("leaving audio thread.\n")); -#ifdef GNUSTEP - GSUnregisterCurrentThread(); /* SB20010904 */ -#endif - return result; -} - -/*******************************************************************************************/ -static PaError Pa_SetupDeviceFormat( int devHandle, int numChannels, int sampleRate ) -{ - PaError result = paNoError; - int tmp; - - /* Set format, channels, and rate in this order to keep OSS happy. */ - /* Set data format. FIXME - handle more native formats. */ - tmp = AFMT_S16_NE; - if( ioctl(devHandle,SNDCTL_DSP_SETFMT,&tmp) == -1) - { - ERR_RPT(("Pa_SetupDeviceFormat: could not SNDCTL_DSP_SETFMT\n" )); - return paHostError; - } - if( tmp != AFMT_S16_NE ) - { - ERR_RPT(("Pa_SetupDeviceFormat: HW does not support AFMT_S16_NE\n" )); - return paHostError; - } - - - /* Set number of channels. */ - tmp = numChannels; - if (ioctl(devHandle, SNDCTL_DSP_CHANNELS, &numChannels) == -1) - { - ERR_RPT(("Pa_SetupDeviceFormat: could not SNDCTL_DSP_CHANNELS\n" )); - return paHostError; - } - if( tmp != numChannels) - { - ERR_RPT(("Pa_SetupDeviceFormat: HW does not support %d channels\n", numChannels )); - return paHostError; - } - - /* Set playing frequency. 44100, 22050 and 11025 are safe bets. */ - tmp = sampleRate; - if( ioctl(devHandle,SNDCTL_DSP_SPEED,&tmp) == -1) - { - ERR_RPT(("Pa_SetupDeviceFormat: could not SNDCTL_DSP_SPEED\n" )); - return paHostError; - } - if( tmp != sampleRate) - { - ERR_RPT(("Pa_SetupDeviceFormat: HW does not support %d Hz sample rate\n",sampleRate )); - return paHostError; - } - - return result; -} - -static int CalcHigherLogTwo( int n ) -{ - int log2 = 0; - while( (1< 8 ) - { - numBuffers = (numBuffers + 1) >> 1; - framesPerBuffer = framesPerBuffer << 1; - } - - /* calculate size of buffers in bytes */ - bufferSize = framesPerBuffer * channelsPerFrame * sizeof(short); /* FIXME - other sizes? */ - - /* Calculate next largest power of two */ - powerOfTwo = CalcHigherLogTwo( bufferSize ); - DBUG(("Pa_SetLatency: numBuffers = %d, framesPerBuffer = %d, powerOfTwo = %d\n", - numBuffers, framesPerBuffer, powerOfTwo )); - - /* Encode info into a single int */ - tmp=(numBuffers<<16) + powerOfTwo; - - if(ioctl(devHandle,SNDCTL_DSP_SETFRAGMENT,&tmp) == -1) - { - ERR_RPT(("Pa_SetLatency: could not SNDCTL_DSP_SETFRAGMENT\n" )); - /* Don't return an error. Best to just continue and hope for the best. */ - ERR_RPT(("Pa_SetLatency: numBuffers = %d, framesPerBuffer = %d, powerOfTwo = %d\n", - numBuffers, framesPerBuffer, powerOfTwo )); - } -} - -/************************************************************************* -** Determine minimum number of buffers required for this host based -** on minimum latency. Latency can be optionally set by user by setting -** an environment variable. For example, to set latency to 200 msec, put: -** -** set PA_MIN_LATENCY_MSEC=200 -** -** in the cshrc file. -*/ -#define PA_LATENCY_ENV_NAME ("PA_MIN_LATENCY_MSEC") - -int Pa_GetMinNumBuffers( int framesPerBuffer, double framesPerSecond ) -{ - int minBuffers; - int minLatencyMsec = MIN_LATENCY_MSEC; - char *minLatencyText = getenv(PA_LATENCY_ENV_NAME); - if( minLatencyText != NULL ) - { - PRINT(("PA_MIN_LATENCY_MSEC = %s\n", minLatencyText )); - minLatencyMsec = atoi( minLatencyText ); - if( minLatencyMsec < 1 ) minLatencyMsec = 1; - else if( minLatencyMsec > 5000 ) minLatencyMsec = 5000; - } - - minBuffers = (int) ((minLatencyMsec * framesPerSecond) / ( 1000.0 * framesPerBuffer )); - if( minBuffers < 2 ) minBuffers = 2; - return minBuffers; -} - -/*******************************************************************/ -PaError PaHost_OpenStream( internalPortAudioStream *past ) -{ - PaError result = paNoError; - PaHostSoundControl *pahsc; - unsigned int minNumBuffers; - internalPortAudioDevice *pad; - DBUG(("PaHost_OpenStream() called.\n" )); - - /* Allocate and initialize host data. */ - pahsc = (PaHostSoundControl *) malloc(sizeof(PaHostSoundControl)); - if( pahsc == NULL ) - { - result = paInsufficientMemory; - goto error; - } - memset( pahsc, 0, sizeof(PaHostSoundControl) ); - past->past_DeviceData = (void *) pahsc; - - pahsc->pahsc_OutputHandle = BAD_DEVICE_ID; /* No device currently opened. */ - pahsc->pahsc_InputHandle = BAD_DEVICE_ID; - pahsc->pahsc_AudioThread = INVALID_THREAD; - pahsc->pahsc_WatchDogThread = INVALID_THREAD; - - /* Allocate native buffers. */ - pahsc->pahsc_BytesPerInputBuffer = past->past_FramesPerUserBuffer * - past->past_NumInputChannels * sizeof(short); - if( past->past_NumInputChannels > 0) - { - pahsc->pahsc_NativeInputBuffer = (short *) malloc(pahsc->pahsc_BytesPerInputBuffer); - if( pahsc->pahsc_NativeInputBuffer == NULL ) - { - result = paInsufficientMemory; - goto error; - } - } - pahsc->pahsc_BytesPerOutputBuffer = past->past_FramesPerUserBuffer * - past->past_NumOutputChannels * sizeof(short); - if( past->past_NumOutputChannels > 0) - { - pahsc->pahsc_NativeOutputBuffer = (short *) malloc(pahsc->pahsc_BytesPerOutputBuffer); - if( pahsc->pahsc_NativeOutputBuffer == NULL ) - { - result = paInsufficientMemory; - goto error; - } - } - - /* DBUG(("PaHost_OpenStream: pahsc_MinFramesPerHostBuffer = %d\n", pahsc->pahsc_MinFramesPerHostBuffer )); */ - minNumBuffers = Pa_GetMinNumBuffers( past->past_FramesPerUserBuffer, past->past_SampleRate ); - past->past_NumUserBuffers = ( minNumBuffers > past->past_NumUserBuffers ) ? minNumBuffers : past->past_NumUserBuffers; - - pahsc->pahsc_InverseMicrosPerBuffer = past->past_SampleRate / (1000000.0 * past->past_FramesPerUserBuffer); - DBUG(("pahsc_InverseMicrosPerBuffer = %g\n", pahsc->pahsc_InverseMicrosPerBuffer )); - - /* ------------------------- OPEN DEVICE -----------------------*/ - - /* just output */ - if (past->past_OutputDeviceID == past->past_InputDeviceID) - { - - if ((past->past_NumOutputChannels > 0) && (past->past_NumInputChannels > 0) ) - { - pad = Pa_GetInternalDevice( past->past_OutputDeviceID ); - DBUG(("PaHost_OpenStream: attempt to open %s for O_RDWR\n", pad->pad_DeviceName )); - - /* dmazzoni: test it first in nonblocking mode to - make sure the device is not busy */ - pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDWR|O_NONBLOCK); - if(pahsc->pahsc_InputHandle==-1) - { - ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDWR\n", pad->pad_DeviceName )); - result = paHostError; - goto error; - } - close(pahsc->pahsc_InputHandle); - - pahsc->pahsc_OutputHandle = pahsc->pahsc_InputHandle = - open(pad->pad_DeviceName,O_RDWR); - if(pahsc->pahsc_InputHandle==-1) - { - ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDWR\n", pad->pad_DeviceName )); - result = paHostError; - goto error; - } - Pa_SetLatency( pahsc->pahsc_OutputHandle, - past->past_NumUserBuffers, past->past_FramesPerUserBuffer, - past->past_NumOutputChannels ); - result = Pa_SetupDeviceFormat( pahsc->pahsc_OutputHandle, - past->past_NumOutputChannels, (int)past->past_SampleRate ); - } - } - else - { - if (past->past_NumOutputChannels > 0) - { - pad = Pa_GetInternalDevice( past->past_OutputDeviceID ); - DBUG(("PaHost_OpenStream: attempt to open %s for O_WRONLY\n", pad->pad_DeviceName )); - /* dmazzoni: test it first in nonblocking mode to - make sure the device is not busy */ - pahsc->pahsc_OutputHandle = open(pad->pad_DeviceName,O_WRONLY|O_NONBLOCK); - if(pahsc->pahsc_OutputHandle==-1) - { - ERR_RPT(("PaHost_OpenStream: could not open %s for O_WRONLY\n", pad->pad_DeviceName )); - result = paHostError; - goto error; - } - close(pahsc->pahsc_OutputHandle); - - pahsc->pahsc_OutputHandle = open(pad->pad_DeviceName,O_WRONLY); - if(pahsc->pahsc_OutputHandle==-1) - { - ERR_RPT(("PaHost_OpenStream: could not open %s for O_WRONLY\n", pad->pad_DeviceName )); - result = paHostError; - goto error; - } - Pa_SetLatency( pahsc->pahsc_OutputHandle, - past->past_NumUserBuffers, past->past_FramesPerUserBuffer, - past->past_NumOutputChannels ); - result = Pa_SetupDeviceFormat( pahsc->pahsc_OutputHandle, - past->past_NumOutputChannels, (int)past->past_SampleRate ); - } - - if (past->past_NumInputChannels > 0) - { - pad = Pa_GetInternalDevice( past->past_InputDeviceID ); - DBUG(("PaHost_OpenStream: attempt to open %s for O_RDONLY\n", pad->pad_DeviceName )); - /* dmazzoni: test it first in nonblocking mode to - make sure the device is not busy */ - pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDONLY|O_NONBLOCK); - if(pahsc->pahsc_InputHandle==-1) - { - ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDONLY\n", pad->pad_DeviceName )); - result = paHostError; - goto error; - } - close(pahsc->pahsc_InputHandle); - - pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDONLY); - if(pahsc->pahsc_InputHandle==-1) - { - ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDONLY\n", pad->pad_DeviceName )); - result = paHostError; - goto error; - } - Pa_SetLatency( pahsc->pahsc_InputHandle, /* DH20010115 - was OutputHandle! */ - past->past_NumUserBuffers, past->past_FramesPerUserBuffer, - past->past_NumInputChannels ); - result = Pa_SetupDeviceFormat( pahsc->pahsc_InputHandle, - past->past_NumInputChannels, (int)past->past_SampleRate ); - } - } - - - DBUG(("PaHost_OpenStream: SUCCESS - result = %d\n", result )); - return result; - -error: - ERR_RPT(("PaHost_OpenStream: ERROR - result = %d\n", result )); - PaHost_CloseStream( past ); - return result; -} - -/*************************************************************************/ -PaError PaHost_StartOutput( internalPortAudioStream *past ) -{ - return paNoError; -} - -/*************************************************************************/ -PaError PaHost_StartInput( internalPortAudioStream *past ) -{ - return paNoError; -} - -/*************************************************************************/ -PaError PaHost_StartEngine( internalPortAudioStream *past ) -{ - PaHostSoundControl *pahsc; - PaError result = paNoError; - int hres; - - pahsc = (PaHostSoundControl *) past->past_DeviceData; - - past->past_StopSoon = 0; - past->past_StopNow = 0; - past->past_IsActive = 1; - - /* Use pthread_create() instead of __clone() because: - * - pthread_create also works for other UNIX systems like Solaris, - * - the Java HotSpot VM crashes in pthread_setcanceltype() when using __clone() - */ - hres = pthread_create(&(pahsc->pahsc_AudioThread), - NULL /*pthread_attr_t * attr*/, - (void*)Pa_AudioThreadProc, past); - if( hres != 0 ) - { - result = paHostError; - sPaHostError = hres; - pahsc->pahsc_AudioThread = INVALID_THREAD; - goto error; - } - -error: - return result; -} - -/*************************************************************************/ -PaError PaHost_StopEngine( internalPortAudioStream *past, int abort ) -{ - int hres; - PaError result = paNoError; - PaHostSoundControl *pahsc = (PaHostSoundControl *) past->past_DeviceData; - - if( pahsc == NULL ) return paNoError; - - /* Tell background thread to stop generating more data and to let current data play out. */ - past->past_StopSoon = 1; - /* If aborting, tell background thread to stop NOW! */ - if( abort ) past->past_StopNow = 1; - - /* Join thread to recover memory resources. */ - if( pahsc->pahsc_AudioThread != INVALID_THREAD ) - { - /* This check is needed for GNUSTEP - SB20010904 */ - if ( !pthread_equal( pahsc->pahsc_AudioThread, pthread_self() ) ) - { - hres = pthread_join( pahsc->pahsc_AudioThread, NULL ); - } - else - { - DBUG(("Play thread was stopped from itself - can't do pthread_join()\n")); - hres = 0; - } - - if( hres != 0 ) - { - result = paHostError; - sPaHostError = hres; - } - pahsc->pahsc_AudioThread = INVALID_THREAD; - } - - past->past_IsActive = 0; - - return result; -} - -/*************************************************************************/ -PaError PaHost_StopInput( internalPortAudioStream *past, int abort ) -{ - return paNoError; -} - -/*************************************************************************/ -PaError PaHost_StopOutput( internalPortAudioStream *past, int abort ) -{ - return paNoError; -} - -/*******************************************************************/ -PaError PaHost_CloseStream( internalPortAudioStream *past ) -{ - PaHostSoundControl *pahsc; - if( past == NULL ) return paBadStreamPtr; - pahsc = (PaHostSoundControl *) past->past_DeviceData; - if( pahsc == NULL ) return paNoError; - - if( pahsc->pahsc_OutputHandle != BAD_DEVICE_ID ) - { - int err; - DBUG(("PaHost_CloseStream: attempt to close output device handle = %d\n", - pahsc->pahsc_OutputHandle )); - err = close(pahsc->pahsc_OutputHandle); - if( err < 0 ) - { - ERR_RPT(("PaHost_CloseStream: warning, closing output device failed.\n")); - } - } - - if( (pahsc->pahsc_InputHandle != BAD_DEVICE_ID) && - (pahsc->pahsc_InputHandle != pahsc->pahsc_OutputHandle) ) - { - int err; - DBUG(("PaHost_CloseStream: attempt to close input device handle = %d\n", - pahsc->pahsc_InputHandle )); - err = close(pahsc->pahsc_InputHandle); - if( err < 0 ) - { - ERR_RPT(("PaHost_CloseStream: warning, closing input device failed.\n")); - } - } - pahsc->pahsc_OutputHandle = BAD_DEVICE_ID; - pahsc->pahsc_InputHandle = BAD_DEVICE_ID; - - if( pahsc->pahsc_NativeInputBuffer ) - { - free( pahsc->pahsc_NativeInputBuffer ); - pahsc->pahsc_NativeInputBuffer = NULL; - } - if( pahsc->pahsc_NativeOutputBuffer ) - { - free( pahsc->pahsc_NativeOutputBuffer ); - pahsc->pahsc_NativeOutputBuffer = NULL; - } - - free( pahsc ); - past->past_DeviceData = NULL; - return paNoError; -} - -/*************************************************************************/ -PaError PaHost_Term( void ) -{ - /* Free all of the linked devices. */ - internalPortAudioDevice *pad, *nextPad; - pad = sDeviceList; - while( pad != NULL ) - { - nextPad = pad->pad_Next; - DBUG(("PaHost_Term: freeing %s\n", pad->pad_DeviceName )); - PaHost_FreeFastMemory( pad, sizeof(internalPortAudioDevice) ); - pad = nextPad; - } - sDeviceList = NULL; - return 0; -} - -/************************************************************************* - * Sleep for the requested number of milliseconds. - */ -void Pa_Sleep( long msec ) -{ -#if 0 - struct timeval timeout; - timeout.tv_sec = msec / 1000; - timeout.tv_usec = (msec % 1000) * 1000; - select( 0, NULL, NULL, NULL, &timeout ); -#else - long usecs = msec * 1000; - usleep( usecs ); -#endif -} - -/************************************************************************* - * Allocate memory that can be accessed in real-time. - * This may need to be held in physical memory so that it is not - * paged to virtual memory. - * This call MUST be balanced with a call to PaHost_FreeFastMemory(). - */ -void *PaHost_AllocateFastMemory( long numBytes ) -{ - void *addr = malloc( numBytes ); /* FIXME - do we need physical, wired, non-virtual memory? */ - if( addr != NULL ) memset( addr, 0, numBytes ); - return addr; -} - -/************************************************************************* - * Free memory that could be accessed in real-time. - * This call MUST be balanced with a call to PaHost_AllocateFastMemory(). - */ -void PaHost_FreeFastMemory( void *addr, long numBytes ) -{ - if( addr != NULL ) free( addr ); -} - - -/***********************************************************************/ -PaError PaHost_StreamActive( internalPortAudioStream *past ) -{ - PaHostSoundControl *pahsc; - if( past == NULL ) return paBadStreamPtr; - pahsc = (PaHostSoundControl *) past->past_DeviceData; - if( pahsc == NULL ) return paInternalError; - return (PaError) (past->past_IsActive != 0); -} - -/***********************************************************************/ -PaTimestamp Pa_StreamTime( PortAudioStream *stream ) -{ - internalPortAudioStream *past = (internalPortAudioStream *) stream; - PaHostSoundControl *pahsc = (PaHostSoundControl *) past->past_DeviceData; - count_info info; - int delta; - - if( past == NULL ) return paBadStreamPtr; - - if( pahsc->pahsc_NativeOutputBuffer ) { - ioctl(pahsc->pahsc_OutputHandle, SNDCTL_DSP_GETOPTR, &info); - delta = (info.bytes - pahsc->pahsc_LastPosPtr) & 0x000FFFFF; - return (pahsc->pahsc_LastStreamBytes + delta) / (past->past_NumOutputChannels * sizeof(short)); - } - else { - ioctl(pahsc->pahsc_InputHandle, SNDCTL_DSP_GETIPTR, &info); - delta = (info.bytes - pahsc->pahsc_LastPosPtr) & 0x000FFFFF; - return (pahsc->pahsc_LastStreamBytes + delta) / (past->past_NumInputChannels * sizeof(short)); - - } -} - -/***********************************************************************/ -long Pa_GetHostError( void ) -{ - return (long) sPaHostError; -} +/* + * PortAudio Portable Real-Time Audio Library + * Latest Version at: http://www.portaudio.com + * Linux OSS Implementation by douglas repetto and Phil Burk + * + * Copyright (c) 1999-2000 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. + * + */ +/* +Modfication History + 1/2001 - Phil Burk - initial hack for Linux + 2/2001 - Douglas Repetto - many improvements, initial query support + 4/2/2001 - Phil - stop/abort thread control, separate in/out native buffers + 5/28/2001 - Phil - use pthread_create() instead of clone(). Thanks Stephen Brandon! + use pthread_join() after thread shutdown. + 5/29/2001 - Phil - query for multiple devices, multiple formats, + input mode and input+output mode working, + Pa_GetCPULoad() implemented. + PLB20010817 - Phil & Janos Haber - don't halt if test of sample rate fails. + SB20010904 - Stephen Brandon - mods needed for GNUSTEP and SndKit + JH20010905 - Janos Haber - FreeBSD mods + 2001-09-22 - Heiko - (i.e. Heiko Purnhagen ;-) + added 24k and 16k to ratesToTry[] + fixed Pa_GetInternalDevice() + changed DEVICE_NAME_BASE from /dev/audio to /dev/dsp + handled SNDCTL_DSP_SPEED in Pq_QueryDevice() more graceful + fixed Pa_StreamTime() for paqa_errs.c + fixed numCannel=2 oddity and error handling in Pa_SetupDeviceFormat() + grep also for HP20010922 ... + PLB20010924 - Phil - merged Heiko's changes + removed sNumDevices and potential related bugs, + use getenv("PA_MIN_LATENCY_MSEC") to set desired latency, + simplify CPU Load calculation by comparing real-time to framesPerBuffer, + always close device when querying even if error occurs, + PLB20010927 - Phil - Improved negotiation for numChannels. + SG20011005 - Stewart Greenhill - set numChannels back to reasonable value after query. + DH20010115 - David Herring - fixed uninitialized handle. + + DM20020218 - Dominic Mazzoni - Try to open in nonblocking mode first, in case + the device is already open. New implementation of + Pa_StreamTime that uses SNDCTL_DSP_GETOPTR but + uses our own counter to avoid wraparound. + PLB20020222 - Phil Burk - Added WatchDog proc if audio running at high priority. + Check error return from read() and write(). + Check CPU endianness instead of assuming Little Endian. + +TODO +O- put semaphore lock around shared data? +O- handle native formats better +O- handle stereo-only device better ??? +O- what if input and output of a device capabilities differ (e.g. es1371) ??? +*/ +/* + PROPOSED - should we add this to "portaudio.h". Problem with + Pa_QueryDevice() not having same driver name os Pa_OpenStream(). + + A PaDriverInfo structure can be passed to the underlying device + on the Pa_OpenStream() call. The contents and interpretation of + the structure is determined by the PA implementation. +*/ +typedef struct PaDriverInfo /* PROPOSED */ +{ + /* Size of structure. Allows driver to extend the structure without breaking existing applications. */ + int size; + /* Can be used to request a specific device name. */ + const char *name; + unsigned long data; +} +PaDriverInfo; + + + +#include +#include +#ifndef __FreeBSD__ +#include +#endif +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#if defined(__linux__) +#include +#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) +#include +#elif defined(__OpenBSD__) +#include +#else +#include /* JH20010905 */ +#endif +#endif +#endif + +#include "portaudio.h" +#include "pa_host.h" +#include "pa_trace.h" + +#define PRINT(x) { printf x; fflush(stdout); } +#define ERR_RPT(x) PRINT(x) +#define DBUG(x) /* PRINT(x) */ +#define DBUGX(x) /* PRINT(x) */ + +#define BAD_DEVICE_ID (-1) + +#define MIN_LATENCY_MSEC (100) +#define MIN_TIMEOUT_MSEC (100) +#define MAX_TIMEOUT_MSEC (1000) + +/************************************************* Definitions ********/ +#ifdef __linux__ + #define DEVICE_NAME_BASE "/dev/dsp" +#else + #define DEVICE_NAME_BASE "/dev/audio" +#endif + +/* What is a pthread_t anyway? Here is a guess at a value that will never happen in real life. */ +#define INVALID_THREAD (-1) + +#define MAX_CHARS_DEVNAME (32) +#define MAX_SAMPLE_RATES (10) +typedef struct internalPortAudioDevice +{ + struct internalPortAudioDevice *pad_Next; /* Singly linked list. */ + double pad_SampleRates[MAX_SAMPLE_RATES]; /* for pointing to from pad_Info */ + char pad_DeviceName[MAX_CHARS_DEVNAME]; + PaDeviceInfo pad_Info; +} +internalPortAudioDevice; + +/* Define structure to contain all OSS and Linux specific data. */ +typedef struct PaHostSoundControl +{ + int pahsc_OutputHandle; + int pahsc_InputHandle; + int pahsc_AudioPriority; /* priority of background audio thread */ + pthread_t pahsc_AudioThread; /* background audio thread */ + pid_t pahsc_AudioThreadPID; /* background audio thread */ + pthread_t pahsc_WatchDogThread; /* highest priority thread that protects system */ + int pahsc_WatchDogRun; /* Ask WatchDog to stop. */ + pthread_t pahsc_CanaryThread; /* low priority thread that detects abuse by audio */ + struct timeval pahsc_CanaryTime; + int pahsc_CanaryRun; /* Ask Canary to stop. */ + short *pahsc_NativeInputBuffer; + short *pahsc_NativeOutputBuffer; + unsigned int pahsc_BytesPerInputBuffer; /* native buffer size in bytes */ + unsigned int pahsc_BytesPerOutputBuffer; /* native buffer size in bytes */ + /* For measuring CPU utilization. */ + struct timeval pahsc_EntryTime; + double pahsc_InverseMicrosPerBuffer; /* 1/Microseconds of real-time audio per user buffer. */ + + /* For calculating stream time */ + int pahsc_LastPosPtr; + double pahsc_LastStreamBytes; +} +PaHostSoundControl; + +/************************************************* Shared Data ********/ +/* FIXME - put Mutex around this shared data. */ +static internalPortAudioDevice *sDeviceList = NULL; +static int sDefaultInputDeviceID = paNoDevice; +static int sDefaultOutputDeviceID = paNoDevice; +static int sPaHostError = 0; + +/************************************************* Prototypes **********/ + +static internalPortAudioDevice *Pa_GetInternalDevice( PaDeviceID id ); +static PaError Pa_QueryDevices( void ); +static PaError Pa_QueryDevice( const char *deviceName, internalPortAudioDevice *pad ); +static PaError Pa_SetupDeviceFormat( int devHandle, int numChannels, int sampleRate ); + +/********************************* BEGIN CPU UTILIZATION MEASUREMENT ****/ +static void Pa_StartUsageCalculation( internalPortAudioStream *past ) +{ + PaHostSoundControl *pahsc = (PaHostSoundControl *) past->past_DeviceData; + if( pahsc == NULL ) return; + /* Query system timer for usage analysis and to prevent overuse of CPU. */ + gettimeofday( &pahsc->pahsc_EntryTime, NULL ); +} + +static long SubtractTime_AminusB( struct timeval *timeA, struct timeval *timeB ) +{ + long secs = timeA->tv_sec - timeB->tv_sec; + long usecs = secs * 1000000; + usecs += (timeA->tv_usec - timeB->tv_usec); + return usecs; +} + +/****************************************************************************** +** Measure fractional CPU load based on real-time it took to calculate +** buffers worth of output. +*/ +static void Pa_EndUsageCalculation( internalPortAudioStream *past ) +{ + struct timeval currentTime; + long usecsElapsed; + double newUsage; + +#define LOWPASS_COEFFICIENT_0 (0.95) +#define LOWPASS_COEFFICIENT_1 (0.99999 - LOWPASS_COEFFICIENT_0) + + PaHostSoundControl *pahsc = (PaHostSoundControl *) past->past_DeviceData; + if( pahsc == NULL ) return; + + if( gettimeofday( ¤tTime, NULL ) == 0 ) + { + usecsElapsed = SubtractTime_AminusB( ¤tTime, &pahsc->pahsc_EntryTime ); + /* Use inverse because it is faster than the divide. */ + newUsage = usecsElapsed * pahsc->pahsc_InverseMicrosPerBuffer; + + past->past_Usage = (LOWPASS_COEFFICIENT_0 * past->past_Usage) + + (LOWPASS_COEFFICIENT_1 * newUsage); + } +} +/****************************************** END CPU UTILIZATION *******/ + +#ifndef AFMT_S16_NE +#define AFMT_S16_NE Get_AFMT_S16_NE() +/********************************************************************* + * Some versions of OSS do not define AFMT_S16_NE. So check CPU. + * PowerPC is Big Endian. X86 is Little Endian. + */ +static int Get_AFMT_S16_NE( void ) +{ + long testData = 1; + char *ptr = (char *) &testData; + int isLittle = ( *ptr == 1 ); /* Does address point to least significant byte? */ + return isLittle ? AFMT_S16_LE : AFMT_S16_BE; +} +#endif + +/********************************************************************* + * Try to open the named device. + * If it opens, try to set various rates and formats and fill in + * the device info structure. + */ +static PaError Pa_QueryDevice( const char *deviceName, internalPortAudioDevice *pad ) +{ + int result = paHostError; + int tempDevHandle; + int numChannels, maxNumChannels; + int format; + int numSampleRates; + int sampleRate; + int numRatesToTry; + int ratesToTry[9] = {96000, 48000, 44100, 32000, 24000, 22050, 16000, 11025, 8000}; + int i; + + /* douglas: + we have to do this querying in a slightly different order. apparently + some sound cards will give you different info based on their settins. + e.g. a card might give you stereo at 22kHz but only mono at 44kHz. + the correct order for OSS is: format, channels, sample rate + + */ + if ( (tempDevHandle = open(deviceName,O_WRONLY|O_NONBLOCK)) == -1 ) + { + DBUG(("Pa_QueryDevice: could not open %s\n", deviceName )); + return paHostError; + } + + /* Ask OSS what formats are supported by the hardware. */ + pad->pad_Info.nativeSampleFormats = 0; + if (ioctl(tempDevHandle, SNDCTL_DSP_GETFMTS, &format) == -1) + { + ERR_RPT(("Pa_QueryDevice: could not get format info\n" )); + goto error; + } + if( format & AFMT_U8 ) pad->pad_Info.nativeSampleFormats |= paUInt8; + if( format & AFMT_S16_NE ) pad->pad_Info.nativeSampleFormats |= paInt16; + + /* Negotiate for the maximum number of channels for this device. PLB20010927 + * Consider up to 16 as the upper number of channels. + * Variable numChannels should contain the actual upper limit after the call. + * Thanks to John Lazzaro and Heiko Purnhagen for suggestions. + */ + maxNumChannels = 0; + for( numChannels = 1; numChannels <= 16; numChannels++ ) + { + int temp = numChannels; + DBUG(("Pa_QueryDevice: use SNDCTL_DSP_CHANNELS, numChannels = %d\n", numChannels )) + if(ioctl(tempDevHandle, SNDCTL_DSP_CHANNELS, &temp) < 0 ) + { + /* ioctl() failed so bail out if we already have stereo */ + if( numChannels > 2 ) break; + } + else + { + /* ioctl() worked but bail out if it does not support numChannels. + * We don't want to leave gaps in the numChannels supported. + */ + if( (numChannels > 2) && (temp != numChannels) ) break; + DBUG(("Pa_QueryDevice: temp = %d\n", temp )) + if( temp > maxNumChannels ) maxNumChannels = temp; /* Save maximum. */ + } + } + + /* The above negotiation may fail for an old driver so try this older technique. */ + if( maxNumChannels < 1 ) + { + int stereo = 1; + if(ioctl(tempDevHandle, SNDCTL_DSP_STEREO, &stereo) < 0) + { + maxNumChannels = 1; + } + else + { + maxNumChannels = (stereo) ? 2 : 1; + } + DBUG(("Pa_QueryDevice: use SNDCTL_DSP_STEREO, maxNumChannels = %d\n", maxNumChannels )) + } + + pad->pad_Info.maxOutputChannels = maxNumChannels; + DBUG(("Pa_QueryDevice: maxNumChannels = %d\n", maxNumChannels)) + + /* During channel negotiation, the last ioctl() may have failed. This can + * also cause sample rate negotiation to fail. Hence the following, to return + * to a supported number of channels. SG20011005 */ + { + int temp = maxNumChannels; + if( temp > 2 ) temp = 2; /* use most reasonable default value */ + ioctl(tempDevHandle, SNDCTL_DSP_CHANNELS, &temp); + } + + /* FIXME - for now, assume maxInputChannels = maxOutputChannels. + * Eventually do separate queries for O_WRONLY and O_RDONLY + */ + pad->pad_Info.maxInputChannels = pad->pad_Info.maxOutputChannels; + + DBUG(("Pa_QueryDevice: maxInputChannels = %d\n", + pad->pad_Info.maxInputChannels)) + + + /* Determine available sample rates by trying each one and seeing result. + */ + numSampleRates = 0; + numRatesToTry = sizeof(ratesToTry)/sizeof(int); + for (i = 0; i < numRatesToTry; i++) + { + sampleRate = ratesToTry[i]; + + if (ioctl(tempDevHandle, SNDCTL_DSP_SPEED, &sampleRate) >= 0 ) /* PLB20010817 */ + { + if (sampleRate == ratesToTry[i]) + { + DBUG(("Pa_QueryDevice: got sample rate: %d\n", sampleRate)) + pad->pad_SampleRates[numSampleRates] = (float)ratesToTry[i]; + numSampleRates++; + } + } + } + + DBUG(("Pa_QueryDevice: final numSampleRates = %d\n", numSampleRates)) + if (numSampleRates==0) /* HP20010922 */ + { + ERR_RPT(("Pa_QueryDevice: no supported sample rate (or SNDCTL_DSP_SPEED ioctl call failed).\n" )); + goto error; + } + + pad->pad_Info.numSampleRates = numSampleRates; + pad->pad_Info.sampleRates = pad->pad_SampleRates; + + pad->pad_Info.name = deviceName; + + result = paNoError; + +error: + /* We MUST close the handle here or we won't be able to reopen it later!!! */ + close(tempDevHandle); + + return result; +} + +/********************************************************************* + * Determines the number of available devices by trying to open + * each "/dev/dsp#" or "/dsp/audio#" in order until it fails. + * Add each working device to a singly linked list of devices. + */ +static PaError Pa_QueryDevices( void ) +{ + internalPortAudioDevice *pad, *lastPad; + int go = 1; + int numDevices = 0; + PaError testResult; + PaError result = paNoError; + + sDefaultInputDeviceID = paNoDevice; + sDefaultOutputDeviceID = paNoDevice; + + lastPad = NULL; + + while( go ) + { + /* Allocate structure to hold device info. */ + pad = PaHost_AllocateFastMemory( sizeof(internalPortAudioDevice) ); + if( pad == NULL ) return paInsufficientMemory; + memset( pad, 0, sizeof(internalPortAudioDevice) ); + + /* Build name for device. */ + if( numDevices == 0 ) + { + sprintf( pad->pad_DeviceName, DEVICE_NAME_BASE); + } + else + { + sprintf( pad->pad_DeviceName, DEVICE_NAME_BASE "%d", numDevices ); + } + + DBUG(("Try device %s\n", pad->pad_DeviceName )); + testResult = Pa_QueryDevice( pad->pad_DeviceName, pad ); + DBUG(("Pa_QueryDevice returned %d\n", testResult )); + if( testResult != paNoError ) + { + if( lastPad == NULL ) + { + result = testResult; /* No good devices! */ + } + go = 0; + PaHost_FreeFastMemory( pad, sizeof(internalPortAudioDevice) ); + } + else + { + numDevices += 1; + /* Add to linked list of devices. */ + if( lastPad ) + { + lastPad->pad_Next = pad; + } + else + { + sDeviceList = pad; /* First element in linked list. */ + } + lastPad = pad; + } + } + + return result; + +} + +/*************************************************************************/ +int Pa_CountDevices() +{ + int numDevices = 0; + internalPortAudioDevice *pad; + + if( sDeviceList == NULL ) Pa_Initialize(); + /* Count devices in list. */ + pad = sDeviceList; + while( pad != NULL ) + { + pad = pad->pad_Next; + numDevices++; + } + + return numDevices; +} + +/*************************************************************************/ +static internalPortAudioDevice *Pa_GetInternalDevice( PaDeviceID id ) +{ + internalPortAudioDevice *pad; + if( (id < 0) || ( id >= Pa_CountDevices()) ) return NULL; + pad = sDeviceList; + while( id > 0 ) + { + pad = pad->pad_Next; + id--; + } + return pad; +} + +/*************************************************************************/ +const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceID id ) +{ + internalPortAudioDevice *pad; + if( (id < 0) || ( id >= Pa_CountDevices()) ) return NULL; + pad = Pa_GetInternalDevice( id ); + return &pad->pad_Info ; +} + +static PaError Pa_MaybeQueryDevices( void ) +{ + if( sDeviceList == NULL ) + { + return Pa_QueryDevices(); + } + return 0; +} + +PaDeviceID Pa_GetDefaultInputDeviceID( void ) +{ + /* return paNoDevice; */ + return 0; +} + +PaDeviceID Pa_GetDefaultOutputDeviceID( void ) +{ + return 0; +} + +/********************************************************************** +** Make sure that we have queried the device capabilities. +*/ + +PaError PaHost_Init( void ) +{ + return Pa_MaybeQueryDevices(); +} + +/******************************************************************************************* + * The ol' Canary in a Coal Mine trick. + * Just update the time periodically. + * Runs at low priority so if audio thread runs wild, this thread will get starved + * and the watchdog will detect it. + */ + +#define SCHEDULER_POLICY SCHED_RR +#define WATCHDOG_MAX_SECONDS (3) +#define WATCHDOG_INTERVAL_USEC (1000000) + +static int PaHost_CanaryProc( PaHostSoundControl *pahsc ) +{ + int result = 0; + +#ifdef GNUSTEP + GSRegisterCurrentThread(); /* SB20010904 */ +#endif + + while( pahsc->pahsc_CanaryRun) + { + usleep( WATCHDOG_INTERVAL_USEC ); + gettimeofday( &pahsc->pahsc_CanaryTime, NULL ); + } + + DBUG(("PaHost_CanaryProc: exiting.\n")); + +#ifdef GNUSTEP + GSUnregisterCurrentThread(); /* SB20010904 */ +#endif + + return result; +} + +/******************************************************************************************* + * Monitor audio thread and lower its it if it hogs the CPU. + * To prevent getting killed, the audio thread must update a + * variable with a timer value. + * If the value is not recent enough, then the + * thread will get killed. + */ + +static PaError PaHost_WatchDogProc( PaHostSoundControl *pahsc ) +{ + PaError result = 0; + struct sched_param schp = { 0 }; + int maxPri; + +#ifdef GNUSTEP + GSRegisterCurrentThread(); /* SB20010904 */ +#endif + +/* Run at a priority level above audio thread so we can still run if it hangs. */ +/* Rise more than 1 because of rumored off-by-one scheduler bugs. */ + schp.sched_priority = pahsc->pahsc_AudioPriority + 4; + maxPri = sched_get_priority_max(SCHEDULER_POLICY); + if( schp.sched_priority > maxPri ) schp.sched_priority = maxPri; + + if (sched_setscheduler(0, SCHEDULER_POLICY, &schp) != 0) + { + ERR_RPT(("PaHost_WatchDogProc: cannot set watch dog priority!\n")); + goto killAudio; + } + + /* Compare watchdog time with audio and canary thread times. */ + /* Sleep for a while or until thread cancelled. */ + while( pahsc->pahsc_WatchDogRun) + { + int delta; + struct timeval currentTime; + + usleep( WATCHDOG_INTERVAL_USEC ); + gettimeofday( ¤tTime, NULL ); + + /* If audio thread is not advancing, then lower its priority. */ + delta = currentTime.tv_sec - pahsc->pahsc_EntryTime.tv_sec; + DBUG(("PaHost_WatchDogProc: audio delta = %d\n", delta )); + if( delta > WATCHDOG_MAX_SECONDS ) + { + goto killAudio; + } + + /* If canary died, then kill audio and canary. */ + delta = currentTime.tv_sec - pahsc->pahsc_CanaryTime.tv_sec; + if( delta > WATCHDOG_MAX_SECONDS ) + { + ERR_RPT(("PaHost_WatchDogProc: canary died!\n")); + goto lowerAudio; + } + } + + DBUG(("PaHost_WatchDogProc: exiting.\n")); +#ifdef GNUSTEP + GSUnregisterCurrentThread(); /* SB20010904 */ +#endif + return 0; + +lowerAudio: + { + struct sched_param schat = { 0 }; + if( sched_setscheduler(pahsc->pahsc_AudioThreadPID, SCHED_OTHER, &schat) != 0) + { + ERR_RPT(("PaHost_WatchDogProc: failed to lower audio priority. errno = %d\n", errno )); + /* Fall through into killing audio thread. */ + } + else + { + ERR_RPT(("PaHost_WatchDogProc: lowered audio priority to prevent hogging of CPU.\n")); + goto cleanup; + } + } + +killAudio: + ERR_RPT(("PaHost_WatchDogProc: killing hung audio thread!\n")); + pthread_kill( pahsc->pahsc_AudioThread, SIGKILL ); + +cleanup: + pahsc->pahsc_CanaryRun = 0; + DBUG(("PaHost_WatchDogProc: cancel Canary\n")); + pthread_cancel( pahsc->pahsc_CanaryThread ); + DBUG(("PaHost_WatchDogProc: join Canary\n")); + pthread_join( pahsc->pahsc_CanaryThread, NULL ); + DBUG(("PaHost_WatchDogProc: forget Canary\n")); + pahsc->pahsc_CanaryThread = INVALID_THREAD; + +#ifdef GNUSTEP + GSUnregisterCurrentThread(); /* SB20010904 */ +#endif + return 0; +} + +/*******************************************************************************************/ +static void PaHost_StopWatchDog( PaHostSoundControl *pahsc ) +{ +/* Cancel WatchDog thread if there is one. */ + if( pahsc->pahsc_WatchDogThread != INVALID_THREAD ) + { + pahsc->pahsc_WatchDogRun = 0; + DBUG(("PaHost_StopWatchDog: cancel WatchDog\n")); + pthread_cancel( pahsc->pahsc_WatchDogThread ); + pthread_join( pahsc->pahsc_WatchDogThread, NULL ); + pahsc->pahsc_WatchDogThread = INVALID_THREAD; + } +/* Cancel Canary thread if there is one. */ + if( pahsc->pahsc_CanaryThread != INVALID_THREAD ) + { + pahsc->pahsc_CanaryRun = 0; + DBUG(("PaHost_StopWatchDog: cancel Canary\n")); + pthread_cancel( pahsc->pahsc_CanaryThread ); + DBUG(("PaHost_StopWatchDog: join Canary\n")); + pthread_join( pahsc->pahsc_CanaryThread, NULL ); + pahsc->pahsc_CanaryThread = INVALID_THREAD; + } +} + +/*******************************************************************************************/ +static PaError PaHost_StartWatchDog( PaHostSoundControl *pahsc ) +{ + int hres; + PaError result = 0; + + /* The watch dog watches for these timer updates */ + gettimeofday( &pahsc->pahsc_EntryTime, NULL ); + gettimeofday( &pahsc->pahsc_CanaryTime, NULL ); + + /* Launch a canary thread to detect priority abuse. */ + pahsc->pahsc_CanaryRun = 1; + hres = pthread_create(&(pahsc->pahsc_CanaryThread), + NULL /*pthread_attr_t * attr*/, + (void*)PaHost_CanaryProc, pahsc); + if( hres != 0 ) + { + pahsc->pahsc_CanaryThread = INVALID_THREAD; + result = paHostError; + sPaHostError = hres; + goto error; + } + + /* Launch a watchdog thread to prevent runaway audio thread. */ + pahsc->pahsc_WatchDogRun = 1; + hres = pthread_create(&(pahsc->pahsc_WatchDogThread), + NULL /*pthread_attr_t * attr*/, + (void*)PaHost_WatchDogProc, pahsc); + if( hres != 0 ) + { + pahsc->pahsc_WatchDogThread = INVALID_THREAD; + result = paHostError; + sPaHostError = hres; + goto error; + } + return result; + +error: + PaHost_StopWatchDog( pahsc ); + return result; +} + +/******************************************************************************************* + * Bump priority of audio thread if running with superuser priveledges. + * if priority bumped then launch a watchdog. + */ +static PaError PaHost_BoostPriority( internalPortAudioStream *past ) +{ + PaHostSoundControl *pahsc; + PaError result = paNoError; + struct sched_param schp = { 0 }; + + pahsc = (PaHostSoundControl *) past->past_DeviceData; + if( pahsc == NULL ) return paInternalError; + + pahsc->pahsc_AudioThreadPID = getpid(); + DBUG(("PaHost_BoostPriority: audio PID = %d\n", pahsc->pahsc_AudioThreadPID )); + + /* Choose a priority in the middle of the range. */ + pahsc->pahsc_AudioPriority = (sched_get_priority_max(SCHEDULER_POLICY) - + sched_get_priority_min(SCHEDULER_POLICY)) / 2; + schp.sched_priority = pahsc->pahsc_AudioPriority; + + if (sched_setscheduler(0, SCHEDULER_POLICY, &schp) != 0) + { + PRINT(("PortAudio: only superuser can use real-time priority.\n")); + } + else + { + PRINT(("PortAudio: audio callback priority set to level %d!\n", schp.sched_priority)); + /* We are running at high priority so we should have a watchdog in case audio goes wild. */ + result = PaHost_StartWatchDog( pahsc ); + } + + return result; +} + +/*******************************************************************************************/ +static PaError Pa_AudioThreadProc( internalPortAudioStream *past ) +{ + PaError result; + PaHostSoundControl *pahsc; + ssize_t bytes_read, bytes_written; + count_info info; + int delta; + + pahsc = (PaHostSoundControl *) past->past_DeviceData; + if( pahsc == NULL ) return paInternalError; + +#ifdef GNUSTEP + GSRegisterCurrentThread(); /* SB20010904 */ +#endif + + result = PaHost_BoostPriority( past ); + if( result < 0 ) goto error; + + past->past_IsActive = 1; + DBUG(("entering thread.\n")); + + while( (past->past_StopNow == 0) && (past->past_StopSoon == 0) ) + { + /* Read data from device */ + if(pahsc->pahsc_NativeInputBuffer) + { + DBUG(("Pa_AudioThreadProc: attempt to read %d bytes\n", pahsc->pahsc_BytesPerInputBuffer)); + bytes_read = read(pahsc->pahsc_InputHandle, + (void *)pahsc->pahsc_NativeInputBuffer, + pahsc->pahsc_BytesPerInputBuffer); + DBUG(("Pa_AudioThreadProc: bytes_read = %d\n", bytes_read)); + if( bytes_read < pahsc->pahsc_BytesPerInputBuffer ) + { + ERR_RPT(("PortAudio: read interrupted! Only got %d bytes.\n", bytes_read )); + break; + } + } + + /* Convert 16 bit native data to user data and call user routine. */ + DBUG(("converting...\n")); + Pa_StartUsageCalculation( past ); + result = Pa_CallConvertInt16( past, + pahsc->pahsc_NativeInputBuffer, + pahsc->pahsc_NativeOutputBuffer ); + Pa_EndUsageCalculation( past ); + if( result != 0) + { + DBUG(("hmm, Pa_CallConvertInt16() says: %d. i'm bailing.\n", + result)); + break; + } + + /* Write data to device. */ + if( pahsc->pahsc_NativeOutputBuffer ) + { + + bytes_written = write(pahsc->pahsc_OutputHandle, + (void *)pahsc->pahsc_NativeOutputBuffer, + pahsc->pahsc_BytesPerOutputBuffer); + if( bytes_written < pahsc->pahsc_BytesPerOutputBuffer ) + { + ERR_RPT(("PortAudio: write interrupted! Only got %d bytes.\n", bytes_written )); + break; + } + } + + /* Update current stream time (using a double so that + we don't wrap around like info.bytes does) */ + if( pahsc->pahsc_NativeOutputBuffer ) + ioctl(pahsc->pahsc_OutputHandle, SNDCTL_DSP_GETOPTR, &info); + else + ioctl(pahsc->pahsc_InputHandle, SNDCTL_DSP_GETIPTR, &info); + delta = (info.bytes - pahsc->pahsc_LastPosPtr) & 0x000FFFFF; + pahsc->pahsc_LastStreamBytes += delta; + pahsc->pahsc_LastPosPtr = info.bytes; + } + DBUG(("Pa_AudioThreadProc: left audio loop.\n")); + + past->past_IsActive = 0; + PaHost_StopWatchDog( pahsc ); + +error: + DBUG(("leaving audio thread.\n")); +#ifdef GNUSTEP + GSUnregisterCurrentThread(); /* SB20010904 */ +#endif + return result; +} + +/*******************************************************************************************/ +static PaError Pa_SetupDeviceFormat( int devHandle, int numChannels, int sampleRate ) +{ + PaError result = paNoError; + int tmp; + + /* Set format, channels, and rate in this order to keep OSS happy. */ + /* Set data format. FIXME - handle more native formats. */ + tmp = AFMT_S16_NE; + if( ioctl(devHandle,SNDCTL_DSP_SETFMT,&tmp) == -1) + { + ERR_RPT(("Pa_SetupDeviceFormat: could not SNDCTL_DSP_SETFMT\n" )); + return paHostError; + } + if( tmp != AFMT_S16_NE ) + { + ERR_RPT(("Pa_SetupDeviceFormat: HW does not support AFMT_S16_NE\n" )); + return paHostError; + } + + + /* Set number of channels. */ + tmp = numChannels; + if (ioctl(devHandle, SNDCTL_DSP_CHANNELS, &numChannels) == -1) + { + ERR_RPT(("Pa_SetupDeviceFormat: could not SNDCTL_DSP_CHANNELS\n" )); + return paHostError; + } + if( tmp != numChannels) + { + ERR_RPT(("Pa_SetupDeviceFormat: HW does not support %d channels\n", numChannels )); + return paHostError; + } + + /* Set playing frequency. 44100, 22050 and 11025 are safe bets. */ + tmp = sampleRate; + if( ioctl(devHandle,SNDCTL_DSP_SPEED,&tmp) == -1) + { + ERR_RPT(("Pa_SetupDeviceFormat: could not SNDCTL_DSP_SPEED\n" )); + return paHostError; + } + if( tmp != sampleRate) + { + ERR_RPT(("Pa_SetupDeviceFormat: HW does not support %d Hz sample rate\n",sampleRate )); + return paHostError; + } + + return result; +} + +static int CalcHigherLogTwo( int n ) +{ + int log2 = 0; + while( (1< 8 ) + { + numBuffers = (numBuffers + 1) >> 1; + framesPerBuffer = framesPerBuffer << 1; + } + + /* calculate size of buffers in bytes */ + bufferSize = framesPerBuffer * channelsPerFrame * sizeof(short); /* FIXME - other sizes? */ + + /* Calculate next largest power of two */ + powerOfTwo = CalcHigherLogTwo( bufferSize ); + DBUG(("Pa_SetLatency: numBuffers = %d, framesPerBuffer = %d, powerOfTwo = %d\n", + numBuffers, framesPerBuffer, powerOfTwo )); + + /* Encode info into a single int */ + tmp=(numBuffers<<16) + powerOfTwo; + + if(ioctl(devHandle,SNDCTL_DSP_SETFRAGMENT,&tmp) == -1) + { + ERR_RPT(("Pa_SetLatency: could not SNDCTL_DSP_SETFRAGMENT\n" )); + /* Don't return an error. Best to just continue and hope for the best. */ + ERR_RPT(("Pa_SetLatency: numBuffers = %d, framesPerBuffer = %d, powerOfTwo = %d\n", + numBuffers, framesPerBuffer, powerOfTwo )); + } +} + +/************************************************************************* +** Determine minimum number of buffers required for this host based +** on minimum latency. Latency can be optionally set by user by setting +** an environment variable. For example, to set latency to 200 msec, put: +** +** set PA_MIN_LATENCY_MSEC=200 +** +** in the cshrc file. +*/ +#define PA_LATENCY_ENV_NAME ("PA_MIN_LATENCY_MSEC") + +int Pa_GetMinNumBuffers( int framesPerBuffer, double framesPerSecond ) +{ + int minBuffers; + int minLatencyMsec = MIN_LATENCY_MSEC; + char *minLatencyText = getenv(PA_LATENCY_ENV_NAME); + if( minLatencyText != NULL ) + { + PRINT(("PA_MIN_LATENCY_MSEC = %s\n", minLatencyText )); + minLatencyMsec = atoi( minLatencyText ); + if( minLatencyMsec < 1 ) minLatencyMsec = 1; + else if( minLatencyMsec > 5000 ) minLatencyMsec = 5000; + } + + minBuffers = (int) ((minLatencyMsec * framesPerSecond) / ( 1000.0 * framesPerBuffer )); + if( minBuffers < 2 ) minBuffers = 2; + return minBuffers; +} + +/*******************************************************************/ +PaError PaHost_OpenStream( internalPortAudioStream *past ) +{ + PaError result = paNoError; + PaHostSoundControl *pahsc; + unsigned int minNumBuffers; + internalPortAudioDevice *pad; + DBUG(("PaHost_OpenStream() called.\n" )); + + /* Allocate and initialize host data. */ + pahsc = (PaHostSoundControl *) malloc(sizeof(PaHostSoundControl)); + if( pahsc == NULL ) + { + result = paInsufficientMemory; + goto error; + } + memset( pahsc, 0, sizeof(PaHostSoundControl) ); + past->past_DeviceData = (void *) pahsc; + + pahsc->pahsc_OutputHandle = BAD_DEVICE_ID; /* No device currently opened. */ + pahsc->pahsc_InputHandle = BAD_DEVICE_ID; + pahsc->pahsc_AudioThread = INVALID_THREAD; + pahsc->pahsc_WatchDogThread = INVALID_THREAD; + + /* Allocate native buffers. */ + pahsc->pahsc_BytesPerInputBuffer = past->past_FramesPerUserBuffer * + past->past_NumInputChannels * sizeof(short); + if( past->past_NumInputChannels > 0) + { + pahsc->pahsc_NativeInputBuffer = (short *) malloc(pahsc->pahsc_BytesPerInputBuffer); + if( pahsc->pahsc_NativeInputBuffer == NULL ) + { + result = paInsufficientMemory; + goto error; + } + } + pahsc->pahsc_BytesPerOutputBuffer = past->past_FramesPerUserBuffer * + past->past_NumOutputChannels * sizeof(short); + if( past->past_NumOutputChannels > 0) + { + pahsc->pahsc_NativeOutputBuffer = (short *) malloc(pahsc->pahsc_BytesPerOutputBuffer); + if( pahsc->pahsc_NativeOutputBuffer == NULL ) + { + result = paInsufficientMemory; + goto error; + } + } + + /* DBUG(("PaHost_OpenStream: pahsc_MinFramesPerHostBuffer = %d\n", pahsc->pahsc_MinFramesPerHostBuffer )); */ + minNumBuffers = Pa_GetMinNumBuffers( past->past_FramesPerUserBuffer, past->past_SampleRate ); + past->past_NumUserBuffers = ( minNumBuffers > past->past_NumUserBuffers ) ? minNumBuffers : past->past_NumUserBuffers; + + pahsc->pahsc_InverseMicrosPerBuffer = past->past_SampleRate / (1000000.0 * past->past_FramesPerUserBuffer); + DBUG(("pahsc_InverseMicrosPerBuffer = %g\n", pahsc->pahsc_InverseMicrosPerBuffer )); + + /* ------------------------- OPEN DEVICE -----------------------*/ + + /* just output */ + if (past->past_OutputDeviceID == past->past_InputDeviceID) + { + + if ((past->past_NumOutputChannels > 0) && (past->past_NumInputChannels > 0) ) + { + pad = Pa_GetInternalDevice( past->past_OutputDeviceID ); + DBUG(("PaHost_OpenStream: attempt to open %s for O_RDWR\n", pad->pad_DeviceName )); + + /* dmazzoni: test it first in nonblocking mode to + make sure the device is not busy */ + pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDWR|O_NONBLOCK); + if(pahsc->pahsc_InputHandle==-1) + { + ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDWR\n", pad->pad_DeviceName )); + result = paHostError; + goto error; + } + close(pahsc->pahsc_InputHandle); + + pahsc->pahsc_OutputHandle = pahsc->pahsc_InputHandle = + open(pad->pad_DeviceName,O_RDWR); + if(pahsc->pahsc_InputHandle==-1) + { + ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDWR\n", pad->pad_DeviceName )); + result = paHostError; + goto error; + } + Pa_SetLatency( pahsc->pahsc_OutputHandle, + past->past_NumUserBuffers, past->past_FramesPerUserBuffer, + past->past_NumOutputChannels ); + result = Pa_SetupDeviceFormat( pahsc->pahsc_OutputHandle, + past->past_NumOutputChannels, (int)past->past_SampleRate ); + } + } + else + { + if (past->past_NumOutputChannels > 0) + { + pad = Pa_GetInternalDevice( past->past_OutputDeviceID ); + DBUG(("PaHost_OpenStream: attempt to open %s for O_WRONLY\n", pad->pad_DeviceName )); + /* dmazzoni: test it first in nonblocking mode to + make sure the device is not busy */ + pahsc->pahsc_OutputHandle = open(pad->pad_DeviceName,O_WRONLY|O_NONBLOCK); + if(pahsc->pahsc_OutputHandle==-1) + { + ERR_RPT(("PaHost_OpenStream: could not open %s for O_WRONLY\n", pad->pad_DeviceName )); + result = paHostError; + goto error; + } + close(pahsc->pahsc_OutputHandle); + + pahsc->pahsc_OutputHandle = open(pad->pad_DeviceName,O_WRONLY); + if(pahsc->pahsc_OutputHandle==-1) + { + ERR_RPT(("PaHost_OpenStream: could not open %s for O_WRONLY\n", pad->pad_DeviceName )); + result = paHostError; + goto error; + } + Pa_SetLatency( pahsc->pahsc_OutputHandle, + past->past_NumUserBuffers, past->past_FramesPerUserBuffer, + past->past_NumOutputChannels ); + result = Pa_SetupDeviceFormat( pahsc->pahsc_OutputHandle, + past->past_NumOutputChannels, (int)past->past_SampleRate ); + } + + if (past->past_NumInputChannels > 0) + { + pad = Pa_GetInternalDevice( past->past_InputDeviceID ); + DBUG(("PaHost_OpenStream: attempt to open %s for O_RDONLY\n", pad->pad_DeviceName )); + /* dmazzoni: test it first in nonblocking mode to + make sure the device is not busy */ + pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDONLY|O_NONBLOCK); + if(pahsc->pahsc_InputHandle==-1) + { + ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDONLY\n", pad->pad_DeviceName )); + result = paHostError; + goto error; + } + close(pahsc->pahsc_InputHandle); + + pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDONLY); + if(pahsc->pahsc_InputHandle==-1) + { + ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDONLY\n", pad->pad_DeviceName )); + result = paHostError; + goto error; + } + Pa_SetLatency( pahsc->pahsc_InputHandle, /* DH20010115 - was OutputHandle! */ + past->past_NumUserBuffers, past->past_FramesPerUserBuffer, + past->past_NumInputChannels ); + result = Pa_SetupDeviceFormat( pahsc->pahsc_InputHandle, + past->past_NumInputChannels, (int)past->past_SampleRate ); + } + } + + + DBUG(("PaHost_OpenStream: SUCCESS - result = %d\n", result )); + return result; + +error: + ERR_RPT(("PaHost_OpenStream: ERROR - result = %d\n", result )); + PaHost_CloseStream( past ); + return result; +} + +/*************************************************************************/ +PaError PaHost_StartOutput( internalPortAudioStream *past ) +{ + return paNoError; +} + +/*************************************************************************/ +PaError PaHost_StartInput( internalPortAudioStream *past ) +{ + return paNoError; +} + +/*************************************************************************/ +PaError PaHost_StartEngine( internalPortAudioStream *past ) +{ + PaHostSoundControl *pahsc; + PaError result = paNoError; + int hres; + + pahsc = (PaHostSoundControl *) past->past_DeviceData; + + past->past_StopSoon = 0; + past->past_StopNow = 0; + past->past_IsActive = 1; + + /* Use pthread_create() instead of __clone() because: + * - pthread_create also works for other UNIX systems like Solaris, + * - the Java HotSpot VM crashes in pthread_setcanceltype() when using __clone() + */ + hres = pthread_create(&(pahsc->pahsc_AudioThread), + NULL /*pthread_attr_t * attr*/, + (void*)Pa_AudioThreadProc, past); + if( hres != 0 ) + { + result = paHostError; + sPaHostError = hres; + pahsc->pahsc_AudioThread = INVALID_THREAD; + goto error; + } + +error: + return result; +} + +/*************************************************************************/ +PaError PaHost_StopEngine( internalPortAudioStream *past, int abort ) +{ + int hres; + PaError result = paNoError; + PaHostSoundControl *pahsc = (PaHostSoundControl *) past->past_DeviceData; + + if( pahsc == NULL ) return paNoError; + + /* Tell background thread to stop generating more data and to let current data play out. */ + past->past_StopSoon = 1; + /* If aborting, tell background thread to stop NOW! */ + if( abort ) past->past_StopNow = 1; + + /* Join thread to recover memory resources. */ + if( pahsc->pahsc_AudioThread != INVALID_THREAD ) + { + /* This check is needed for GNUSTEP - SB20010904 */ + if ( !pthread_equal( pahsc->pahsc_AudioThread, pthread_self() ) ) + { + hres = pthread_join( pahsc->pahsc_AudioThread, NULL ); + } + else + { + DBUG(("Play thread was stopped from itself - can't do pthread_join()\n")); + hres = 0; + } + + if( hres != 0 ) + { + result = paHostError; + sPaHostError = hres; + } + pahsc->pahsc_AudioThread = INVALID_THREAD; + } + + past->past_IsActive = 0; + + return result; +} + +/*************************************************************************/ +PaError PaHost_StopInput( internalPortAudioStream *past, int abort ) +{ + return paNoError; +} + +/*************************************************************************/ +PaError PaHost_StopOutput( internalPortAudioStream *past, int abort ) +{ + return paNoError; +} + +/*******************************************************************/ +PaError PaHost_CloseStream( internalPortAudioStream *past ) +{ + PaHostSoundControl *pahsc; + if( past == NULL ) return paBadStreamPtr; + pahsc = (PaHostSoundControl *) past->past_DeviceData; + if( pahsc == NULL ) return paNoError; + + if( pahsc->pahsc_OutputHandle != BAD_DEVICE_ID ) + { + int err; + DBUG(("PaHost_CloseStream: attempt to close output device handle = %d\n", + pahsc->pahsc_OutputHandle )); + err = close(pahsc->pahsc_OutputHandle); + if( err < 0 ) + { + ERR_RPT(("PaHost_CloseStream: warning, closing output device failed.\n")); + } + } + + if( (pahsc->pahsc_InputHandle != BAD_DEVICE_ID) && + (pahsc->pahsc_InputHandle != pahsc->pahsc_OutputHandle) ) + { + int err; + DBUG(("PaHost_CloseStream: attempt to close input device handle = %d\n", + pahsc->pahsc_InputHandle )); + err = close(pahsc->pahsc_InputHandle); + if( err < 0 ) + { + ERR_RPT(("PaHost_CloseStream: warning, closing input device failed.\n")); + } + } + pahsc->pahsc_OutputHandle = BAD_DEVICE_ID; + pahsc->pahsc_InputHandle = BAD_DEVICE_ID; + + if( pahsc->pahsc_NativeInputBuffer ) + { + free( pahsc->pahsc_NativeInputBuffer ); + pahsc->pahsc_NativeInputBuffer = NULL; + } + if( pahsc->pahsc_NativeOutputBuffer ) + { + free( pahsc->pahsc_NativeOutputBuffer ); + pahsc->pahsc_NativeOutputBuffer = NULL; + } + + free( pahsc ); + past->past_DeviceData = NULL; + return paNoError; +} + +/*************************************************************************/ +PaError PaHost_Term( void ) +{ + /* Free all of the linked devices. */ + internalPortAudioDevice *pad, *nextPad; + pad = sDeviceList; + while( pad != NULL ) + { + nextPad = pad->pad_Next; + DBUG(("PaHost_Term: freeing %s\n", pad->pad_DeviceName )); + PaHost_FreeFastMemory( pad, sizeof(internalPortAudioDevice) ); + pad = nextPad; + } + sDeviceList = NULL; + return 0; +} + +/************************************************************************* + * Sleep for the requested number of milliseconds. + */ +void Pa_Sleep( long msec ) +{ +#if 0 + struct timeval timeout; + timeout.tv_sec = msec / 1000; + timeout.tv_usec = (msec % 1000) * 1000; + select( 0, NULL, NULL, NULL, &timeout ); +#else + long usecs = msec * 1000; + usleep( usecs ); +#endif +} + +/************************************************************************* + * Allocate memory that can be accessed in real-time. + * This may need to be held in physical memory so that it is not + * paged to virtual memory. + * This call MUST be balanced with a call to PaHost_FreeFastMemory(). + */ +void *PaHost_AllocateFastMemory( long numBytes ) +{ + void *addr = malloc( numBytes ); /* FIXME - do we need physical, wired, non-virtual memory? */ + if( addr != NULL ) memset( addr, 0, numBytes ); + return addr; +} + +/************************************************************************* + * Free memory that could be accessed in real-time. + * This call MUST be balanced with a call to PaHost_AllocateFastMemory(). + */ +void PaHost_FreeFastMemory( void *addr, long numBytes ) +{ + if( addr != NULL ) free( addr ); +} + + +/***********************************************************************/ +PaError PaHost_StreamActive( internalPortAudioStream *past ) +{ + PaHostSoundControl *pahsc; + if( past == NULL ) return paBadStreamPtr; + pahsc = (PaHostSoundControl *) past->past_DeviceData; + if( pahsc == NULL ) return paInternalError; + return (PaError) (past->past_IsActive != 0); +} + +/***********************************************************************/ +PaTimestamp Pa_StreamTime( PortAudioStream *stream ) +{ + internalPortAudioStream *past = (internalPortAudioStream *) stream; + PaHostSoundControl *pahsc = (PaHostSoundControl *) past->past_DeviceData; + count_info info; + int delta; + + if( past == NULL ) return paBadStreamPtr; + + if( pahsc->pahsc_NativeOutputBuffer ) { + ioctl(pahsc->pahsc_OutputHandle, SNDCTL_DSP_GETOPTR, &info); + delta = (info.bytes - pahsc->pahsc_LastPosPtr) & 0x000FFFFF; + return (pahsc->pahsc_LastStreamBytes + delta) / (past->past_NumOutputChannels * sizeof(short)); + } + else { + ioctl(pahsc->pahsc_InputHandle, SNDCTL_DSP_GETIPTR, &info); + delta = (info.bytes - pahsc->pahsc_LastPosPtr) & 0x000FFFFF; + return (pahsc->pahsc_LastStreamBytes + delta) / (past->past_NumInputChannels * sizeof(short)); + + } +} + +/***********************************************************************/ +long Pa_GetHostError( void ) +{ + return (long) sPaHostError; +}