diff options
Diffstat (limited to 'pd/portaudio_v18/pa_unix_oss/pa_unix.c')
| -rw-r--r-- | pd/portaudio_v18/pa_unix_oss/pa_unix.c | 1122 |
1 files changed, 0 insertions, 1122 deletions
diff --git a/pd/portaudio_v18/pa_unix_oss/pa_unix.c b/pd/portaudio_v18/pa_unix_oss/pa_unix.c deleted file mode 100644 index 8d652b73..00000000 --- a/pd/portaudio_v18/pa_unix_oss/pa_unix.c +++ /dev/null @@ -1,1122 +0,0 @@ -/* - * 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. - * - */ - -/* -Modification 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 <purnhage@tnt.uni-hannover.de> ;-) - 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. - 20020621 - pa_unix_oss.c split into pa_unix.c, pa_unix.h, pa_unix_oss.c by - Augustus Saunders. Return values from usleep() ignored by Sam Bayer - because not cross-platform compatible (at least until we get configure - going). Pa_SetupDeviceFormat split into input and output sides to - reflect capabilities of Solaris. - - 20030206 - Martin Rohrbach - various mods for Solaris - - 20030410 - Bjorn Dittmer-Roche - fixed numerous problems associated with pthread_t - - 20030630 - Thomas Richter - eliminated unused variable warnings. - -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) ??? -*/ - - -#include "pa_unix.h" - -typedef void *(*pthread_function_t)(void *); - -/************************************************* 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; - -/********************************* 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 *******/ - -/********************************************************************* - * 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. - */ -PaError Pa_QueryDevices( void ) -{ - internalPortAudioDevice *pad, *lastPad; - int go = 1; - int numDevices = 0; - PaError testResult; - PaError result = paNoError; - char *envdev; - - sDefaultInputDeviceID = paNoDevice; - sDefaultOutputDeviceID = paNoDevice; - - lastPad = NULL; - - while( go ) - { - /* Allocate structure to hold device info. */ - pad = (internalPortAudioDevice *) - 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; - } - } - - /* I'm sitting at a SunRay1 and I neither have /dev/audio# nor /dev/dsp#. - Instead, the correct audio device is stored in the environment variable - AUDIODEV and/or UTAUDIODEV, so check these devices as well if we haven't - checked them yet above - MR */ - - DBUG(("Checking for AUDIODEV and UTAUDIODEV\n")); - envdev = getenv("AUDIODEV"); - if (envdev != NULL && !strstr(envdev, DEVICE_NAME_BASE)) { - result = paNoError; - - /* Allocate structure to hold device info. */ - pad = (internalPortAudioDevice *) - PaHost_AllocateFastMemory( sizeof(internalPortAudioDevice) ); - if( pad == NULL ) return paInsufficientMemory; - memset( pad, 0, sizeof(internalPortAudioDevice) ); - - /* Build name for device. */ - strcpy(pad->pad_DeviceName, envdev); - - 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! */ - } - 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; - } - } - - envdev = getenv("UTAUDIODEV"); - if (envdev != NULL && !strstr(envdev, DEVICE_NAME_BASE) && getenv("AUDIODEV") != NULL && strcmp(envdev, getenv("AUDIODEV"))) { - result = paNoError; - - /* Allocate structure to hold device info. */ - pad = (internalPortAudioDevice *) - PaHost_AllocateFastMemory( sizeof(internalPortAudioDevice) ); - if( pad == NULL ) return paInsufficientMemory; - memset( pad, 0, sizeof(internalPortAudioDevice) ); - - /* Build name for device. */ - strcpy(pad->pad_DeviceName, envdev); - - 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! */ - } - 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; -} - -/*************************************************************************/ -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 ) -{ - 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 it must be hung so kill it. */ - 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 lower audio priority and halt 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_IsCanaryThreadValid = 0; - -#ifdef GNUSTEP - GSUnregisterCurrentThread(); /* SB20010904 */ -#endif - return 0; -} - -/*******************************************************************************************/ -static void PaHost_StopWatchDog( PaHostSoundControl *pahsc ) -{ -/* Cancel WatchDog thread if there is one. */ - if( pahsc->pahsc_IsWatchDogThreadValid ) - { - pahsc->pahsc_WatchDogRun = 0; - DBUG(("PaHost_StopWatchDog: cancel WatchDog\n")); - pthread_cancel( pahsc->pahsc_WatchDogThread ); - pthread_join( pahsc->pahsc_WatchDogThread, NULL ); - pahsc->pahsc_IsWatchDogThreadValid = 0; - } -/* Cancel Canary thread if there is one. */ - if( pahsc->pahsc_IsCanaryThreadValid ) - { - 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_IsCanaryThreadValid = 0; - } -} - -/*******************************************************************************************/ -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*/, - (pthread_function_t)PaHost_CanaryProc, pahsc); - if( hres != 0 ) - { - pahsc->pahsc_IsCanaryThreadValid = 0; - result = paHostError; - sPaHostError = hres; - goto error; - } - pahsc->pahsc_IsCanaryThreadValid = 1; - - /* Launch a watchdog thread to prevent runaway audio thread. */ - pahsc->pahsc_WatchDogRun = 1; - hres = pthread_create(&(pahsc->pahsc_WatchDogThread), - NULL /*pthread_attr_t * attr*/, - (pthread_function_t)PaHost_WatchDogProc, pahsc); - if( hres != 0 ) - { - pahsc->pahsc_IsWatchDogThreadValid = 0; - result = paHostError; - sPaHostError = hres; - goto error; - } - pahsc->pahsc_IsWatchDogThreadValid = 1; - 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) - { - DBUG(("PortAudio: only superuser can use real-time priority.\n")); - } - else - { - DBUG(("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; - - 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) - { - unsigned int totalread = 0; - DBUG(("Pa_AudioThreadProc: attempt to read %d bytes\n", pahsc->pahsc_BytesPerInputBuffer)); - do - { - bytes_read = read(pahsc->pahsc_InputHandle, - (char *)pahsc->pahsc_NativeInputBuffer + totalread, - pahsc->pahsc_BytesPerInputBuffer - totalread); - - if (bytes_read < 0) - { - ERR_RPT(("PortAudio: read interrupted!\n")); - break; - } - - totalread += bytes_read; - } while( totalread < pahsc->pahsc_BytesPerInputBuffer); - } - - /* 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 ) - { - unsigned int totalwritten = 0; - do - { - bytes_written = write(pahsc->pahsc_OutputHandle, - (void *)pahsc->pahsc_NativeOutputBuffer, - pahsc->pahsc_BytesPerOutputBuffer); - if( bytes_written < 0 ) - { - ERR_RPT(("PortAudio: write interrupted!")); - break; - } - - totalwritten += bytes_written; - } while( totalwritten < pahsc->pahsc_BytesPerOutputBuffer); - } - - Pa_UpdateStreamTime(pahsc); - } - 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; -} - -/************************************************************************* -** 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_IsAudioThreadValid = 0; - pahsc->pahsc_IsWatchDogThreadValid = 0; - - /* 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(("past_SampleRate = %g\n", past->past_SampleRate )); - DBUG(("past_FramesPerUserBuffer = %d\n", 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_SetupOutputDeviceFormat( 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_SetupInputDeviceFormat( 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 ) -{ - past = past; /* unused */ - return paNoError; -} - -/*************************************************************************/ -PaError PaHost_StartInput( internalPortAudioStream *past ) -{ - past = past; /* unused */ - 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*/, - (pthread_function_t)Pa_AudioThreadProc, past); - if( hres != 0 ) - { - result = paHostError; - sPaHostError = hres; - pahsc->pahsc_IsAudioThreadValid = 0; - goto error; - } - pahsc->pahsc_IsAudioThreadValid = 1; - -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_IsAudioThreadValid ) - { - /* 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_IsAudioThreadValid = 0; - } - - past->past_IsActive = 0; - - return result; -} - -/*************************************************************************/ -PaError PaHost_StopInput( internalPortAudioStream *past, int abort ) -{ - past = past; /* unused */ - abort = abort; /* unused */ - return paNoError; -} - -/*************************************************************************/ -PaError PaHost_StopOutput( internalPortAudioStream *past, int abort ) -{ - past = past; /* unused */ - abort = abort; /* unused */ - 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 = 0; - DBUG(("PaHost_CloseStream: attempt to close output device handle = %d\n", - pahsc->pahsc_OutputHandle )); - - Pa_FlushStream(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 = 0; - DBUG(("PaHost_CloseStream: attempt to close input device handle = %d\n", - pahsc->pahsc_InputHandle )); - - Pa_FlushStream(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 ) -{ - numBytes = numBytes; /* unused */ - 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); -} - -/***********************************************************************/ -long Pa_GetHostError( void ) -{ - return (long) sPaHostError; -} |