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RtAudio.cpp
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/************************************************************************/
/*! \class RtAudio
\brief Realtime audio i/o C++ classes.
RtAudio provides a common API (Application Programming Interface)
for realtime audio input/output across Linux (native ALSA, Jack,
and OSS), Macintosh OS X (CoreAudio and Jack), and Windows
(DirectSound, ASIO and WASAPI) operating systems.
RtAudio GitHub site: https://github.com/thestk/rtaudio
RtAudio WWW site: http://www.music.mcgill.ca/~gary/rtaudio/
RtAudio: realtime audio i/o C++ classes
Copyright (c) 2001-2021 Gary P. Scavone
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
asked to send the modifications to the original developer so that
they can be incorporated into the canonical version. This is,
however, not a binding provision of this license.
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.
*/
/************************************************************************/
// RtAudio: Version 6.0.0beta1
#include "RtAudio.h"
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <climits>
#include <cmath>
#include <algorithm>
// Static variable definitions.
const unsigned int RtApi::MAX_SAMPLE_RATES = 14;
const unsigned int RtApi::SAMPLE_RATES[] = {
4000, 5512, 8000, 9600, 11025, 16000, 22050,
32000, 44100, 48000, 88200, 96000, 176400, 192000
};
#if defined(_WIN32) || defined(__CYGWIN__)
#define MUTEX_INITIALIZE(A) InitializeCriticalSection(A)
#define MUTEX_DESTROY(A) DeleteCriticalSection(A)
#define MUTEX_LOCK(A) EnterCriticalSection(A)
#define MUTEX_UNLOCK(A) LeaveCriticalSection(A)
#include "tchar.h"
template<typename T> inline
std::string convertCharPointerToStdString(const T *text);
template<> inline
std::string convertCharPointerToStdString(const char *text)
{
return std::string(text);
}
template<> inline
std::string convertCharPointerToStdString(const wchar_t *text)
{
int length = WideCharToMultiByte(CP_UTF8, 0, text, -1, NULL, 0, NULL, NULL);
std::string s( length-1, '\0' );
WideCharToMultiByte(CP_UTF8, 0, text, -1, &s[0], length, NULL, NULL);
return s;
}
#elif defined(__unix__) || defined(__APPLE__)
// pthread API
#define MUTEX_INITIALIZE(A) pthread_mutex_init(A, NULL)
#define MUTEX_DESTROY(A) pthread_mutex_destroy(A)
#define MUTEX_LOCK(A) pthread_mutex_lock(A)
#define MUTEX_UNLOCK(A) pthread_mutex_unlock(A)
#endif
// *************************************************** //
//
// RtAudio definitions.
//
// *************************************************** //
std::string RtAudio :: getVersion( void )
{
return RTAUDIO_VERSION;
}
// Define API names and display names.
// Must be in same order as API enum.
extern "C" {
const char* rtaudio_api_names[][2] = {
{ "unspecified" , "Unknown" },
{ "alsa" , "ALSA" },
{ "pulse" , "Pulse" },
{ "oss" , "OpenSoundSystem" },
{ "jack" , "Jack" },
{ "core" , "CoreAudio" },
{ "wasapi" , "WASAPI" },
{ "asio" , "ASIO" },
{ "ds" , "DirectSound" },
{ "dummy" , "Dummy" },
};
const unsigned int rtaudio_num_api_names =
sizeof(rtaudio_api_names)/sizeof(rtaudio_api_names[0]);
#if defined(__UNIX_JACK__)
std::string escapeJackPortRegex(std::string &str)
{
const std::string need_escaping = "()[]{}*+?$^.|\\";
std::string escaped_string;
for (auto c : str)
{
if (need_escaping.find(c) != std::string::npos)
escaped_string.push_back('\\');
escaped_string.push_back(c);
}
return escaped_string;
}
#endif
// The order here will control the order of RtAudio's API search in
// the constructor.
extern "C" const RtAudio::Api rtaudio_compiled_apis[] = {
#if defined(__UNIX_JACK__)
RtAudio::UNIX_JACK,
#endif
#if defined(__LINUX_PULSE__)
RtAudio::LINUX_PULSE,
#endif
#if defined(__LINUX_ALSA__)
RtAudio::LINUX_ALSA,
#endif
#if defined(__LINUX_OSS__)
RtAudio::LINUX_OSS,
#endif
#if defined(__WINDOWS_ASIO__)
RtAudio::WINDOWS_ASIO,
#endif
#if defined(__WINDOWS_WASAPI__)
RtAudio::WINDOWS_WASAPI,
#endif
#if defined(__WINDOWS_DS__)
RtAudio::WINDOWS_DS,
#endif
#if defined(__MACOSX_CORE__)
RtAudio::MACOSX_CORE,
#endif
#if defined(__RTAUDIO_DUMMY__)
RtAudio::RTAUDIO_DUMMY,
#endif
RtAudio::UNSPECIFIED,
};
extern "C" const unsigned int rtaudio_num_compiled_apis =
sizeof(rtaudio_compiled_apis)/sizeof(rtaudio_compiled_apis[0])-1;
}
// This is a compile-time check that rtaudio_num_api_names == RtAudio::NUM_APIS.
// If the build breaks here, check that they match.
template<bool b> class StaticAssert { private: StaticAssert() {} };
template<> class StaticAssert<true>{ public: StaticAssert() {} };
class StaticAssertions { StaticAssertions() {
StaticAssert<rtaudio_num_api_names == RtAudio::NUM_APIS>();
}};
void RtAudio :: getCompiledApi( std::vector<RtAudio::Api> &apis )
{
apis = std::vector<RtAudio::Api>(rtaudio_compiled_apis,
rtaudio_compiled_apis + rtaudio_num_compiled_apis);
}
std::string RtAudio :: getApiName( RtAudio::Api api )
{
if (api < 0 || api >= RtAudio::NUM_APIS)
return "";
return rtaudio_api_names[api][0];
}
std::string RtAudio :: getApiDisplayName( RtAudio::Api api )
{
if (api < 0 || api >= RtAudio::NUM_APIS)
return "Unknown";
return rtaudio_api_names[api][1];
}
RtAudio::Api RtAudio :: getCompiledApiByName( const std::string &name )
{
unsigned int i=0;
for (i = 0; i < rtaudio_num_compiled_apis; ++i)
if (name == rtaudio_api_names[rtaudio_compiled_apis[i]][0])
return rtaudio_compiled_apis[i];
return RtAudio::UNSPECIFIED;
}
void RtAudio :: openRtApi( RtAudio::Api api )
{
if ( rtapi_ )
delete rtapi_;
rtapi_ = 0;
#if defined(__UNIX_JACK__)
if ( api == UNIX_JACK )
rtapi_ = new RtApiJack();
#endif
#if defined(__LINUX_ALSA__)
if ( api == LINUX_ALSA )
rtapi_ = new RtApiAlsa();
#endif
#if defined(__LINUX_PULSE__)
if ( api == LINUX_PULSE )
rtapi_ = new RtApiPulse();
#endif
#if defined(__LINUX_OSS__)
if ( api == LINUX_OSS )
rtapi_ = new RtApiOss();
#endif
#if defined(__WINDOWS_ASIO__)
if ( api == WINDOWS_ASIO )
rtapi_ = new RtApiAsio();
#endif
#if defined(__WINDOWS_WASAPI__)
if ( api == WINDOWS_WASAPI )
rtapi_ = new RtApiWasapi();
#endif
#if defined(__WINDOWS_DS__)
if ( api == WINDOWS_DS )
rtapi_ = new RtApiDs();
#endif
#if defined(__MACOSX_CORE__)
if ( api == MACOSX_CORE )
rtapi_ = new RtApiCore();
#endif
#if defined(__RTAUDIO_DUMMY__)
if ( api == RTAUDIO_DUMMY )
rtapi_ = new RtApiDummy();
#endif
}
RtAudio :: RtAudio( RtAudio::Api api, RtAudioErrorCallback&& errorCallback )
{
rtapi_ = 0;
std::string errorMessage;
if ( api != UNSPECIFIED ) {
// Attempt to open the specified API.
openRtApi( api );
if ( rtapi_ ) {
if ( errorCallback ) rtapi_->setErrorCallback( errorCallback );
return;
}
// No compiled support for specified API value. Issue a warning
// and continue as if no API was specified.
errorMessage = "RtAudio: no compiled support for specified API argument!";
if ( errorCallback )
errorCallback( RTAUDIO_INVALID_USE, errorMessage );
else
std::cerr << '\n' << errorMessage << '\n' << std::endl;
}
// Iterate through the compiled APIs and return as soon as we find
// one with at least one device or we reach the end of the list.
std::vector< RtAudio::Api > apis;
getCompiledApi( apis );
for ( unsigned int i=0; i<apis.size(); i++ ) {
openRtApi( apis[i] );
if ( rtapi_ && rtapi_->getDeviceCount() ) break;
}
if ( rtapi_ ) {
if ( errorCallback ) rtapi_->setErrorCallback( errorCallback );
return;
}
// It should not be possible to get here because the preprocessor
// definition __RTAUDIO_DUMMY__ is automatically defined in RtAudio.h
// if no API-specific definitions are passed to the compiler. But just
// in case something weird happens, issue an error message and abort.
errorMessage = "RtAudio: no compiled API support found ... critical error!";
if ( errorCallback )
errorCallback( RTAUDIO_INVALID_USE, errorMessage );
else
std::cerr << '\n' << errorMessage << '\n' << std::endl;
abort();
}
RtAudio :: ~RtAudio()
{
if ( rtapi_ )
delete rtapi_;
}
RtAudioErrorType RtAudio :: openStream( RtAudio::StreamParameters *outputParameters,
RtAudio::StreamParameters *inputParameters,
RtAudioFormat format, unsigned int sampleRate,
unsigned int *bufferFrames,
RtAudioCallback callback, void *userData,
RtAudio::StreamOptions *options )
{
return rtapi_->openStream( outputParameters, inputParameters, format,
sampleRate, bufferFrames, callback,
userData, options );
}
// *************************************************** //
//
// Public RtApi definitions (see end of file for
// private or protected utility functions).
//
// *************************************************** //
RtApi :: RtApi()
{
clearStreamInfo();
MUTEX_INITIALIZE( &stream_.mutex );
errorCallback_ = 0;
showWarnings_ = true;
}
RtApi :: ~RtApi()
{
MUTEX_DESTROY( &stream_.mutex );
}
RtAudioErrorType RtApi :: openStream( RtAudio::StreamParameters *oParams,
RtAudio::StreamParameters *iParams,
RtAudioFormat format, unsigned int sampleRate,
unsigned int *bufferFrames,
RtAudioCallback callback, void *userData,
RtAudio::StreamOptions *options )
{
if ( stream_.state != STREAM_CLOSED ) {
errorText_ = "RtApi::openStream: a stream is already open!";
return error( RTAUDIO_INVALID_USE );
}
// Clear stream information potentially left from a previously open stream.
clearStreamInfo();
if ( oParams && oParams->nChannels < 1 ) {
errorText_ = "RtApi::openStream: a non-NULL output StreamParameters structure cannot have an nChannels value less than one.";
return error( RTAUDIO_INVALID_USE );
}
if ( iParams && iParams->nChannels < 1 ) {
errorText_ = "RtApi::openStream: a non-NULL input StreamParameters structure cannot have an nChannels value less than one.";
return error( RTAUDIO_INVALID_USE );
}
if ( oParams == NULL && iParams == NULL ) {
errorText_ = "RtApi::openStream: input and output StreamParameters structures are both NULL!";
return error( RTAUDIO_INVALID_USE );
}
if ( formatBytes(format) == 0 ) {
errorText_ = "RtApi::openStream: 'format' parameter value is undefined.";
return error( RTAUDIO_INVALID_USE );
}
unsigned int nDevices = getDeviceCount();
unsigned int oChannels = 0;
if ( oParams ) {
oChannels = oParams->nChannels;
if ( oParams->deviceId >= nDevices ) {
errorText_ = "RtApi::openStream: output device parameter value is invalid.";
return error( RTAUDIO_INVALID_USE );
}
}
unsigned int iChannels = 0;
if ( iParams ) {
iChannels = iParams->nChannels;
if ( iParams->deviceId >= nDevices ) {
errorText_ = "RtApi::openStream: input device parameter value is invalid.";
return error( RTAUDIO_INVALID_USE );
}
}
bool result;
if ( oChannels > 0 ) {
result = probeDeviceOpen( oParams->deviceId, OUTPUT, oChannels, oParams->firstChannel,
sampleRate, format, bufferFrames, options );
if ( result == false ) {
return error( RTAUDIO_SYSTEM_ERROR );
}
}
if ( iChannels > 0 ) {
result = probeDeviceOpen( iParams->deviceId, INPUT, iChannels, iParams->firstChannel,
sampleRate, format, bufferFrames, options );
if ( result == false ) {
return error( RTAUDIO_SYSTEM_ERROR );
}
}
stream_.callbackInfo.callback = (void *) callback;
stream_.callbackInfo.userData = userData;
if ( options ) options->numberOfBuffers = stream_.nBuffers;
stream_.state = STREAM_STOPPED;
return RTAUDIO_NO_ERROR;
}
unsigned int RtApi :: getDefaultInputDevice( void )
{
// Should be reimplemented in subclasses if necessary.
unsigned int nDevices = getDeviceCount();
for ( unsigned int i = 0; i < nDevices; i++ ) {
if ( getDeviceInfo( i ).isDefaultInput ) {
return i;
}
}
return 0;
}
unsigned int RtApi :: getDefaultOutputDevice( void )
{
// Should be reimplemented in subclasses if necessary.
unsigned int nDevices = getDeviceCount();
for ( unsigned int i = 0; i < nDevices; i++ ) {
if ( getDeviceInfo( i ).isDefaultOutput ) {
return i;
}
}
return 0;
}
void RtApi :: closeStream( void )
{
// MUST be implemented in subclasses!
return;
}
bool RtApi :: probeDeviceOpen( unsigned int /*device*/, StreamMode /*mode*/, unsigned int /*channels*/,
unsigned int /*firstChannel*/, unsigned int /*sampleRate*/,
RtAudioFormat /*format*/, unsigned int * /*bufferSize*/,
RtAudio::StreamOptions * /*options*/ )
{
// MUST be implemented in subclasses!
return FAILURE;
}
void RtApi :: tickStreamTime( void )
{
// Subclasses that do not provide their own implementation of
// getStreamTime should call this function once per buffer I/O to
// provide basic stream time support.
stream_.streamTime += ( stream_.bufferSize * 1.0 / stream_.sampleRate );
/*
#if defined( HAVE_GETTIMEOFDAY )
gettimeofday( &stream_.lastTickTimestamp, NULL );
#endif
*/
}
long RtApi :: getStreamLatency( void )
{
long totalLatency = 0;
if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX )
totalLatency = stream_.latency[0];
if ( stream_.mode == INPUT || stream_.mode == DUPLEX )
totalLatency += stream_.latency[1];
return totalLatency;
}
/*
double RtApi :: getStreamTime( void )
{
#if defined( HAVE_GETTIMEOFDAY )
// Return a very accurate estimate of the stream time by
// adding in the elapsed time since the last tick.
struct timeval then;
struct timeval now;
if ( stream_.state != STREAM_RUNNING || stream_.streamTime == 0.0 )
return stream_.streamTime;
gettimeofday( &now, NULL );
then = stream_.lastTickTimestamp;
return stream_.streamTime +
((now.tv_sec + 0.000001 * now.tv_usec) -
(then.tv_sec + 0.000001 * then.tv_usec));
#else
return stream_.streamTime;
#endif
}
*/
void RtApi :: setStreamTime( double time )
{
if ( time >= 0.0 )
stream_.streamTime = time;
/*
#if defined( HAVE_GETTIMEOFDAY )
gettimeofday( &stream_.lastTickTimestamp, NULL );
#endif
*/
}
unsigned int RtApi :: getStreamSampleRate( void )
{
if ( isStreamOpen() ) return stream_.sampleRate;
else return 0;
}
// *************************************************** //
//
// OS/API-specific methods.
//
// *************************************************** //
#if defined(__MACOSX_CORE__)
#include <unistd.h>
// The OS X CoreAudio API is designed to use a separate callback
// procedure for each of its audio devices. A single RtAudio duplex
// stream using two different devices is supported here, though it
// cannot be guaranteed to always behave correctly because we cannot
// synchronize these two callbacks.
//
// A property listener is installed for over/underrun information.
// However, no functionality is currently provided to allow property
// listeners to trigger user handlers because it is unclear what could
// be done if a critical stream parameter (buffer size, sample rate,
// device disconnect) notification arrived. The listeners entail
// quite a bit of extra code and most likely, a user program wouldn't
// be prepared for the result anyway. However, we do provide a flag
// to the client callback function to inform of an over/underrun.
// A structure to hold various information related to the CoreAudio API
// implementation.
struct CoreHandle {
AudioDeviceID id[2]; // device ids
#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )
AudioDeviceIOProcID procId[2];
#endif
UInt32 iStream[2]; // device stream index (or first if using multiple)
UInt32 nStreams[2]; // number of streams to use
bool xrun[2];
char *deviceBuffer;
pthread_cond_t condition;
int drainCounter; // Tracks callback counts when draining
bool internalDrain; // Indicates if stop is initiated from callback or not.
bool xrunListenerAdded[2];
bool disconnectListenerAdded[2];
CoreHandle()
:deviceBuffer(0), drainCounter(0), internalDrain(false) { nStreams[0] = 1; nStreams[1] = 1; id[0] = 0; id[1] = 0; procId[0] = 0; procId[1] = 0; xrun[0] = false; xrun[1] = false; xrunListenerAdded[0] = false; xrunListenerAdded[1] = false; disconnectListenerAdded[0] = false; disconnectListenerAdded[1] = false; }
};
RtApiCore:: RtApiCore()
{
#if defined( AVAILABLE_MAC_OS_X_VERSION_10_6_AND_LATER )
// This is a largely undocumented but absolutely necessary
// requirement starting with OS-X 10.6. If not called, queries and
// updates to various audio device properties are not handled
// correctly.
CFRunLoopRef theRunLoop = NULL;
AudioObjectPropertyAddress property = { kAudioHardwarePropertyRunLoop,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMain };
OSStatus result = AudioObjectSetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, sizeof(CFRunLoopRef), &theRunLoop);
if ( result != noErr ) {
errorText_ = "RtApiCore::RtApiCore: error setting run loop property!";
error( RTAUDIO_SYSTEM_ERROR );
}
#endif
}
RtApiCore :: ~RtApiCore()
{
// The subclass destructor gets called before the base class
// destructor, so close an existing stream before deallocating
// apiDeviceId memory.
if ( stream_.state != STREAM_CLOSED ) closeStream();
}
unsigned int RtApiCore :: getDeviceCount( void )
{
// Find out how many audio devices there are, if any.
UInt32 dataSize;
AudioObjectPropertyAddress propertyAddress = { kAudioHardwarePropertyDevices, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMain };
OSStatus result = AudioObjectGetPropertyDataSize( kAudioObjectSystemObject, &propertyAddress, 0, NULL, &dataSize );
if ( result != noErr ) {
errorText_ = "RtApiCore::getDeviceCount: OS-X error getting device info!";
error( RTAUDIO_SYSTEM_ERROR );
return 0;
}
return dataSize / sizeof( AudioDeviceID );
}
unsigned int RtApiCore :: getDefaultInputDevice( void )
{
unsigned int nDevices = getDeviceCount();
if ( nDevices <= 1 ) return 0;
AudioDeviceID id;
UInt32 dataSize = sizeof( AudioDeviceID );
AudioObjectPropertyAddress property = { kAudioHardwarePropertyDefaultInputDevice, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMain };
OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, &id );
if ( result != noErr ) {
errorText_ = "RtApiCore::getDefaultInputDevice: OS-X system error getting device.";
error( RTAUDIO_SYSTEM_ERROR );
return 0;
}
dataSize *= nDevices;
AudioDeviceID deviceList[ nDevices ];
property.mSelector = kAudioHardwarePropertyDevices;
result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, (void *) &deviceList );
if ( result != noErr ) {
errorText_ = "RtApiCore::getDefaultInputDevice: OS-X system error getting device IDs.";
error( RTAUDIO_SYSTEM_ERROR );
return 0;
}
for ( unsigned int i=0; i<nDevices; i++ )
if ( id == deviceList[i] ) return i;
errorText_ = "RtApiCore::getDefaultInputDevice: No default device found!";
error( RTAUDIO_WARNING );
return 0;
}
unsigned int RtApiCore :: getDefaultOutputDevice( void )
{
unsigned int nDevices = getDeviceCount();
if ( nDevices <= 1 ) return 0;
AudioDeviceID id;
UInt32 dataSize = sizeof( AudioDeviceID );
AudioObjectPropertyAddress property = { kAudioHardwarePropertyDefaultOutputDevice, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMain };
OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, &id );
if ( result != noErr ) {
errorText_ = "RtApiCore::getDefaultOutputDevice: OS-X system error getting device.";
error( RTAUDIO_SYSTEM_ERROR );
return 0;
}
dataSize = sizeof( AudioDeviceID ) * nDevices;
AudioDeviceID deviceList[ nDevices ];
property.mSelector = kAudioHardwarePropertyDevices;
result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, (void *) &deviceList );
if ( result != noErr ) {
errorText_ = "RtApiCore::getDefaultOutputDevice: OS-X system error getting device IDs.";
error( RTAUDIO_SYSTEM_ERROR );
return 0;
}
for ( unsigned int i=0; i<nDevices; i++ )
if ( id == deviceList[i] ) return i;
errorText_ = "RtApiCore::getDefaultOutputDevice: No default device found!";
error( RTAUDIO_WARNING );
return 0;
}
RtAudio::DeviceInfo RtApiCore :: getDeviceInfo( unsigned int device )
{
RtAudio::DeviceInfo info;
info.probed = false;
// Get device ID
unsigned int nDevices = getDeviceCount();
if ( nDevices == 0 ) {
errorText_ = "RtApiCore::getDeviceInfo: no devices found!";
error( RTAUDIO_INVALID_USE );
return info;
}
if ( device >= nDevices ) {
errorText_ = "RtApiCore::getDeviceInfo: device ID is invalid!";
error( RTAUDIO_INVALID_USE );
return info;
}
AudioDeviceID deviceList[ nDevices ];
UInt32 dataSize = sizeof( AudioDeviceID ) * nDevices;
AudioObjectPropertyAddress property = { kAudioHardwarePropertyDevices,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMain };
OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property,
0, NULL, &dataSize, (void *) &deviceList );
if ( result != noErr ) {
errorText_ = "RtApiCore::getDeviceInfo: OS-X system error getting device IDs.";
error( RTAUDIO_WARNING );
return info;
}
AudioDeviceID id = deviceList[ device ];
// Get the device name.
info.name.erase();
CFStringRef cfname;
dataSize = sizeof( CFStringRef );
property.mSelector = kAudioObjectPropertyManufacturer;
result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &cfname );
if ( result != noErr ) {
errorStream_ << "RtApiCore::probeDeviceInfo: system error (" << getErrorCode( result ) << ") getting device manufacturer.";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
//const char *mname = CFStringGetCStringPtr( cfname, CFStringGetSystemEncoding() );
long length = CFStringGetLength(cfname);
char *mname = (char *)malloc(length * 3 + 1);
#if defined( UNICODE ) || defined( _UNICODE )
CFStringGetCString(cfname, mname, length * 3 + 1, kCFStringEncodingUTF8);
#else
CFStringGetCString(cfname, mname, length * 3 + 1, CFStringGetSystemEncoding());
#endif
info.name.append( (const char *)mname, strlen(mname) );
info.name.append( ": " );
CFRelease( cfname );
free(mname);
property.mSelector = kAudioObjectPropertyName;
result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &cfname );
if ( result != noErr ) {
errorStream_ << "RtApiCore::probeDeviceInfo: system error (" << getErrorCode( result ) << ") getting device name.";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
//const char *name = CFStringGetCStringPtr( cfname, CFStringGetSystemEncoding() );
length = CFStringGetLength(cfname);
char *name = (char *)malloc(length * 3 + 1);
#if defined( UNICODE ) || defined( _UNICODE )
CFStringGetCString(cfname, name, length * 3 + 1, kCFStringEncodingUTF8);
#else
CFStringGetCString(cfname, name, length * 3 + 1, CFStringGetSystemEncoding());
#endif
info.name.append( (const char *)name, strlen(name) );
CFRelease( cfname );
free(name);
// Get the output stream "configuration".
AudioBufferList *bufferList = nil;
property.mSelector = kAudioDevicePropertyStreamConfiguration;
property.mScope = kAudioDevicePropertyScopeOutput;
// property.mElement = kAudioObjectPropertyElementWildcard;
dataSize = 0;
result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );
if ( result != noErr || dataSize == 0 ) {
errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting output stream configuration info for device (" << device << ").";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
// Allocate the AudioBufferList.
bufferList = (AudioBufferList *) malloc( dataSize );
if ( bufferList == NULL ) {
errorText_ = "RtApiCore::getDeviceInfo: memory error allocating output AudioBufferList.";
error( RTAUDIO_WARNING );
return info;
}
result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, bufferList );
if ( result != noErr || dataSize == 0 ) {
free( bufferList );
errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting output stream configuration for device (" << device << ").";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
// Get output channel information.
unsigned int i, nStreams = bufferList->mNumberBuffers;
for ( i=0; i<nStreams; i++ )
info.outputChannels += bufferList->mBuffers[i].mNumberChannels;
free( bufferList );
// Get the input stream "configuration".
property.mScope = kAudioDevicePropertyScopeInput;
result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );
if ( result != noErr || dataSize == 0 ) {
errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting input stream configuration info for device (" << device << ").";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
// Allocate the AudioBufferList.
bufferList = (AudioBufferList *) malloc( dataSize );
if ( bufferList == NULL ) {
errorText_ = "RtApiCore::getDeviceInfo: memory error allocating input AudioBufferList.";
error( RTAUDIO_WARNING );
return info;
}
result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, bufferList );
if (result != noErr || dataSize == 0) {
free( bufferList );
errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting input stream configuration for device (" << device << ").";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
// Get input channel information.
nStreams = bufferList->mNumberBuffers;
for ( i=0; i<nStreams; i++ )
info.inputChannels += bufferList->mBuffers[i].mNumberChannels;
free( bufferList );
// If device opens for both playback and capture, we determine the channels.
if ( info.outputChannels > 0 && info.inputChannels > 0 )
info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;
// Probe the device sample rates.
bool isInput = false;
if ( info.outputChannels == 0 ) isInput = true;
// Determine the supported sample rates.
property.mSelector = kAudioDevicePropertyAvailableNominalSampleRates;
if ( isInput == false ) property.mScope = kAudioDevicePropertyScopeOutput;
result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );
if ( result != kAudioHardwareNoError || dataSize == 0 ) {
errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting sample rate info.";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
UInt32 nRanges = dataSize / sizeof( AudioValueRange );
AudioValueRange rangeList[ nRanges ];
result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &rangeList );
if ( result != kAudioHardwareNoError ) {
errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting sample rates.";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
// The sample rate reporting mechanism is a bit of a mystery. It
// seems that it can either return individual rates or a range of
// rates. I assume that if the min / max range values are the same,
// then that represents a single supported rate and if the min / max
// range values are different, the device supports an arbitrary
// range of values (though there might be multiple ranges, so we'll
// use the most conservative range).
Float64 minimumRate = 1.0, maximumRate = 10000000000.0;
bool haveValueRange = false;
info.sampleRates.clear();
for ( UInt32 i=0; i<nRanges; i++ ) {
if ( rangeList[i].mMinimum == rangeList[i].mMaximum ) {
unsigned int tmpSr = (unsigned int) rangeList[i].mMinimum;
info.sampleRates.push_back( tmpSr );
if ( !info.preferredSampleRate || ( tmpSr <= 48000 && tmpSr > info.preferredSampleRate ) )
info.preferredSampleRate = tmpSr;
} else {
haveValueRange = true;
if ( rangeList[i].mMinimum > minimumRate ) minimumRate = rangeList[i].mMinimum;
if ( rangeList[i].mMaximum < maximumRate ) maximumRate = rangeList[i].mMaximum;
}
}
if ( haveValueRange ) {
for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {
if ( SAMPLE_RATES[k] >= (unsigned int) minimumRate && SAMPLE_RATES[k] <= (unsigned int) maximumRate ) {
info.sampleRates.push_back( SAMPLE_RATES[k] );
if ( !info.preferredSampleRate || ( SAMPLE_RATES[k] <= 48000 && SAMPLE_RATES[k] > info.preferredSampleRate ) )
info.preferredSampleRate = SAMPLE_RATES[k];
}
}
}
// Sort and remove any redundant values
std::sort( info.sampleRates.begin(), info.sampleRates.end() );
info.sampleRates.erase( unique( info.sampleRates.begin(), info.sampleRates.end() ), info.sampleRates.end() );
if ( info.sampleRates.size() == 0 ) {
errorStream_ << "RtApiCore::probeDeviceInfo: No supported sample rates found for device (" << device << ").";
errorText_ = errorStream_.str();
error( RTAUDIO_WARNING );
return info;
}
// Probe the currently configured sample rate
Float64 nominalRate;
dataSize = sizeof( Float64 );
property.mSelector = kAudioDevicePropertyNominalSampleRate;
result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &nominalRate );
if ( result == noErr ) info.currentSampleRate = (unsigned int) nominalRate;
// CoreAudio always uses 32-bit floating point data for PCM streams.
// Thus, any other "physical" formats supported by the device are of
// no interest to the client.
info.nativeFormats = RTAUDIO_FLOAT32;
if ( info.outputChannels > 0 )
if ( getDefaultOutputDevice() == device ) info.isDefaultOutput = true;
if ( info.inputChannels > 0 )
if ( getDefaultInputDevice() == device ) info.isDefaultInput = true;
info.probed = true;
return info;
}
static OSStatus callbackHandler( AudioDeviceID inDevice,
const AudioTimeStamp* /*inNow*/,
const AudioBufferList* inInputData,
const AudioTimeStamp* /*inInputTime*/,
AudioBufferList* outOutputData,
const AudioTimeStamp* /*inOutputTime*/,
void* infoPointer )
{
CallbackInfo *info = (CallbackInfo *) infoPointer;
RtApiCore *object = (RtApiCore *) info->object;
if ( object->callbackEvent( inDevice, inInputData, outOutputData ) == false )
return kAudioHardwareUnspecifiedError;
else
return kAudioHardwareNoError;
}
static OSStatus disconnectListener( AudioObjectID /*inDevice*/,
UInt32 nAddresses,
const AudioObjectPropertyAddress properties[],
void* infoPointer )
{
for ( UInt32 i=0; i<nAddresses; i++ ) {
if ( properties[i].mSelector == kAudioDevicePropertyDeviceIsAlive ) {
CallbackInfo *info = (CallbackInfo *) infoPointer;
RtApiCore *object = (RtApiCore *) info->object;
info->deviceDisconnected = true;
object->closeStream();
return kAudioHardwareUnspecifiedError;
}
}
return kAudioHardwareNoError;
}
static OSStatus xrunListener( AudioObjectID /*inDevice*/,
UInt32 nAddresses,
const AudioObjectPropertyAddress properties[],
void* handlePointer )
{
CoreHandle *handle = (CoreHandle *) handlePointer;
for ( UInt32 i=0; i<nAddresses; i++ ) {
if ( properties[i].mSelector == kAudioDeviceProcessorOverload ) {
if ( properties[i].mScope == kAudioDevicePropertyScopeInput )
handle->xrun[1] = true;
else
handle->xrun[0] = true;
}
}
return kAudioHardwareNoError;
}
bool RtApiCore :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
unsigned int firstChannel, unsigned int sampleRate,
RtAudioFormat format, unsigned int *bufferSize,
RtAudio::StreamOptions *options )
{
// Get device ID
unsigned int nDevices = getDeviceCount();
if ( nDevices == 0 ) {
// This should not happen because a check is made before this function is called.
errorText_ = "RtApiCore::probeDeviceOpen: no devices found!";
return FAILURE;
}