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Diffstat (limited to 'portaudio/src/common/pa_front.c')
| -rw-r--r-- | portaudio/src/common/pa_front.c | 1810 |
1 files changed, 1810 insertions, 0 deletions
diff --git a/portaudio/src/common/pa_front.c b/portaudio/src/common/pa_front.c new file mode 100644 index 0000000..65a656f --- /dev/null +++ b/portaudio/src/common/pa_front.c @@ -0,0 +1,1810 @@ +/* + * $Id$ + * Portable Audio I/O Library Multi-Host API front end + * Validate function parameters and manage multiple host APIs. + * + * Based on the Open Source API proposed by Ross Bencina + * Copyright (c) 1999-2008 Ross Bencina, Phil Burk + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files + * (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * 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. + */ + +/* + * The text above constitutes the entire PortAudio license; however, + * the PortAudio community also makes the following non-binding requests: + * + * 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. It is also + * requested that these non-binding requests be included along with the + * license above. + */ + +/** @file + @ingroup common_src + + @brief Implements PortAudio API functions defined in portaudio.h, checks + some errors, delegates platform-specific behavior to host API implementations. + + Implements the functions defined in the PortAudio API (portaudio.h), + validates some parameters and checks for state inconsistencies before + forwarding API requests to specific Host API implementations (via the + interface declared in pa_hostapi.h), and Streams (via the interface + declared in pa_stream.h). + + This file manages initialization and termination of Host API + implementations via initializer functions stored in the paHostApiInitializers + global array (usually defined in an os-specific pa_[os]_hostapis.c file). + + This file maintains a list of all open streams and closes them at Pa_Terminate(). + + Some utility functions declared in pa_util.h are implemented in this file. + + All PortAudio API functions can be conditionally compiled with logging code. + To compile with logging, define the PA_LOG_API_CALLS precompiler symbol. +*/ + + +#include <stdio.h> +#include <memory.h> +#include <string.h> +#include <stdlib.h> /* needed for strtol() */ +#include <assert.h> /* needed by PA_VALIDATE_ENDIANNESS */ + +#include "portaudio.h" +#include "pa_util.h" +#include "pa_endianness.h" +#include "pa_types.h" +#include "pa_hostapi.h" +#include "pa_stream.h" +#include "pa_trace.h" /* still useful?*/ +#include "pa_debugprint.h" + +#ifndef PA_GIT_REVISION +#include "pa_gitrevision.h" +#endif + +/** + * This is incremented if we make incompatible API changes. + * This version scheme is based loosely on http://semver.org/ + */ +#define paVersionMajor 19 + +/** + * This is incremented when we add functionality in a backwards-compatible manner. + * Or it is set to zero when paVersionMajor is incremented. + */ +#define paVersionMinor 7 + +/** + * This is incremented when we make backwards-compatible bug fixes. + * Or it is set to zero when paVersionMinor changes. + */ +#define paVersionSubMinor 0 + +/** + * This is a combination of paVersionMajor, paVersionMinor and paVersionSubMinor. + * It will always increase so that version numbers can be compared as integers to + * see which is later. + */ +#define paVersion paMakeVersionNumber(paVersionMajor, paVersionMinor, paVersionSubMinor) + +#define STRINGIFY(x) #x +#define TOSTRING(x) STRINGIFY(x) + +#define PA_VERSION_STRING_ TOSTRING(paVersionMajor) "." TOSTRING(paVersionMinor) "." TOSTRING(paVersionSubMinor) +#define PA_VERSION_TEXT_ "PortAudio V" PA_VERSION_STRING_ "-devel, revision " TOSTRING(PA_GIT_REVISION) + +int Pa_GetVersion( void ) +{ + return paVersion; +} + +const char* Pa_GetVersionText( void ) +{ + return PA_VERSION_TEXT_; +} + +static PaVersionInfo versionInfo_ = { + /*.versionMajor =*/ paVersionMajor, + /*.versionMinor =*/ paVersionMinor, + /*.versionSubMinor =*/ paVersionSubMinor, + /*.versionControlRevision =*/ TOSTRING(PA_GIT_REVISION), + /*.versionText =*/ PA_VERSION_TEXT_ +}; + +const PaVersionInfo* Pa_GetVersionInfo( void ) +{ + return &versionInfo_; +} + +#define PA_LAST_HOST_ERROR_TEXT_LENGTH_ 1024 + +static char lastHostErrorText_[ PA_LAST_HOST_ERROR_TEXT_LENGTH_ + 1 ] = {0}; + +static PaHostErrorInfo lastHostErrorInfo_ = { (PaHostApiTypeId)-1, 0, lastHostErrorText_ }; + + +void PaUtil_SetLastHostErrorInfo( PaHostApiTypeId hostApiType, long errorCode, + const char *errorText ) +{ + lastHostErrorInfo_.hostApiType = hostApiType; + lastHostErrorInfo_.errorCode = errorCode; + + strncpy( lastHostErrorText_, errorText, PA_LAST_HOST_ERROR_TEXT_LENGTH_ ); +} + + + +static PaUtilHostApiRepresentation **hostApis_ = 0; +static int hostApisCount_ = 0; +static int defaultHostApiIndex_ = 0; +static int initializationCount_ = 0; +static int deviceCount_ = 0; + +PaUtilStreamRepresentation *firstOpenStream_ = NULL; + + +#define PA_IS_INITIALISED_ (initializationCount_ != 0) + + +static int CountHostApiInitializers( void ) +{ + int result = 0; + + while( paHostApiInitializers[ result ] != 0 ) + ++result; + return result; +} + + +static void TerminateHostApis( void ) +{ + /* terminate in reverse order from initialization */ + PA_DEBUG(("TerminateHostApis in \n")); + + while( hostApisCount_ > 0 ) + { + --hostApisCount_; + hostApis_[hostApisCount_]->Terminate( hostApis_[hostApisCount_] ); + } + hostApisCount_ = 0; + defaultHostApiIndex_ = 0; + deviceCount_ = 0; + + if( hostApis_ != 0 ) + PaUtil_FreeMemory( hostApis_ ); + hostApis_ = 0; + + PA_DEBUG(("TerminateHostApis out\n")); +} + + +static PaError InitializeHostApis( void ) +{ + PaError result = paNoError; + int i, initializerCount, baseDeviceIndex; + + initializerCount = CountHostApiInitializers(); + + hostApis_ = (PaUtilHostApiRepresentation**)PaUtil_AllocateMemory( + sizeof(PaUtilHostApiRepresentation*) * initializerCount ); + if( !hostApis_ ) + { + result = paInsufficientMemory; + goto error; + } + + hostApisCount_ = 0; + defaultHostApiIndex_ = -1; /* indicates that we haven't determined the default host API yet */ + deviceCount_ = 0; + baseDeviceIndex = 0; + + for( i=0; i< initializerCount; ++i ) + { + hostApis_[hostApisCount_] = NULL; + + PA_DEBUG(( "before paHostApiInitializers[%d].\n",i)); + + result = paHostApiInitializers[i]( &hostApis_[hostApisCount_], hostApisCount_ ); + if( result != paNoError ) + goto error; + + PA_DEBUG(( "after paHostApiInitializers[%d].\n",i)); + + if( hostApis_[hostApisCount_] ) + { + PaUtilHostApiRepresentation* hostApi = hostApis_[hostApisCount_]; + assert( hostApi->info.defaultInputDevice < hostApi->info.deviceCount ); + assert( hostApi->info.defaultOutputDevice < hostApi->info.deviceCount ); + + /* the first successfully initialized host API with a default input *or* + output device is used as the default host API. + */ + if( (defaultHostApiIndex_ == -1) && + ( hostApi->info.defaultInputDevice != paNoDevice + || hostApi->info.defaultOutputDevice != paNoDevice ) ) + { + defaultHostApiIndex_ = hostApisCount_; + } + + hostApi->privatePaFrontInfo.baseDeviceIndex = baseDeviceIndex; + + if( hostApi->info.defaultInputDevice != paNoDevice ) + hostApi->info.defaultInputDevice += baseDeviceIndex; + + if( hostApi->info.defaultOutputDevice != paNoDevice ) + hostApi->info.defaultOutputDevice += baseDeviceIndex; + + baseDeviceIndex += hostApi->info.deviceCount; + deviceCount_ += hostApi->info.deviceCount; + + ++hostApisCount_; + } + } + + /* if no host APIs have devices, the default host API is the first initialized host API */ + if( defaultHostApiIndex_ == -1 ) + defaultHostApiIndex_ = 0; + + return result; + +error: + TerminateHostApis(); + return result; +} + + +/* + FindHostApi() finds the index of the host api to which + <device> belongs and returns it. if <hostSpecificDeviceIndex> is + non-null, the host specific device index is returned in it. + returns -1 if <device> is out of range. + +*/ +static int FindHostApi( PaDeviceIndex device, int *hostSpecificDeviceIndex ) +{ + int i=0; + + if( !PA_IS_INITIALISED_ ) + return -1; + + if( device < 0 ) + return -1; + + while( i < hostApisCount_ + && device >= hostApis_[i]->info.deviceCount ) + { + + device -= hostApis_[i]->info.deviceCount; + ++i; + } + + if( i >= hostApisCount_ ) + return -1; + + if( hostSpecificDeviceIndex ) + *hostSpecificDeviceIndex = device; + + return i; +} + + +static void AddOpenStream( PaStream* stream ) +{ + ((PaUtilStreamRepresentation*)stream)->nextOpenStream = firstOpenStream_; + firstOpenStream_ = (PaUtilStreamRepresentation*)stream; +} + + +static void RemoveOpenStream( PaStream* stream ) +{ + PaUtilStreamRepresentation *previous = NULL; + PaUtilStreamRepresentation *current = firstOpenStream_; + + while( current != NULL ) + { + if( ((PaStream*)current) == stream ) + { + if( previous == NULL ) + { + firstOpenStream_ = current->nextOpenStream; + } + else + { + previous->nextOpenStream = current->nextOpenStream; + } + return; + } + else + { + previous = current; + current = current->nextOpenStream; + } + } +} + + +static void CloseOpenStreams( void ) +{ + /* we call Pa_CloseStream() here to ensure that the same destruction + logic is used for automatically closed streams */ + + while( firstOpenStream_ != NULL ) + Pa_CloseStream( firstOpenStream_ ); +} + + +PaError Pa_Initialize( void ) +{ + PaError result; + + PA_LOGAPI_ENTER( "Pa_Initialize" ); + + if( PA_IS_INITIALISED_ ) + { + ++initializationCount_; + result = paNoError; + } + else + { + PA_VALIDATE_TYPE_SIZES; + PA_VALIDATE_ENDIANNESS; + + PaUtil_InitializeClock(); + PaUtil_ResetTraceMessages(); + + result = InitializeHostApis(); + if( result == paNoError ) + ++initializationCount_; + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_Initialize", result ); + + return result; +} + + +PaError Pa_Terminate( void ) +{ + PaError result; + + PA_LOGAPI_ENTER( "Pa_Terminate" ); + + if( PA_IS_INITIALISED_ ) + { + // leave initializationCount_>0 so that Pa_CloseStream() can execute + if( initializationCount_ == 1 ) + { + CloseOpenStreams(); + + TerminateHostApis(); + + PaUtil_DumpTraceMessages(); + } + --initializationCount_; + result = paNoError; + } + else + { + result= paNotInitialized; + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_Terminate", result ); + + return result; +} + + +const PaHostErrorInfo* Pa_GetLastHostErrorInfo( void ) +{ + return &lastHostErrorInfo_; +} + + +const char *Pa_GetErrorText( PaError errorCode ) +{ + const char *result; + + switch( errorCode ) + { + case paNoError: result = "Success"; break; + case paNotInitialized: result = "PortAudio not initialized"; break; + /** @todo could catenate the last host error text to result in the case of paUnanticipatedHostError. see: http://www.portaudio.com/trac/ticket/114 */ + case paUnanticipatedHostError: result = "Unanticipated host error"; break; + case paInvalidChannelCount: result = "Invalid number of channels"; break; + case paInvalidSampleRate: result = "Invalid sample rate"; break; + case paInvalidDevice: result = "Invalid device"; break; + case paInvalidFlag: result = "Invalid flag"; break; + case paSampleFormatNotSupported: result = "Sample format not supported"; break; + case paBadIODeviceCombination: result = "Illegal combination of I/O devices"; break; + case paInsufficientMemory: result = "Insufficient memory"; break; + case paBufferTooBig: result = "Buffer too big"; break; + case paBufferTooSmall: result = "Buffer too small"; break; + case paNullCallback: result = "No callback routine specified"; break; + case paBadStreamPtr: result = "Invalid stream pointer"; break; + case paTimedOut: result = "Wait timed out"; break; + case paInternalError: result = "Internal PortAudio error"; break; + case paDeviceUnavailable: result = "Device unavailable"; break; + case paIncompatibleHostApiSpecificStreamInfo: result = "Incompatible host API specific stream info"; break; + case paStreamIsStopped: result = "Stream is stopped"; break; + case paStreamIsNotStopped: result = "Stream is not stopped"; break; + case paInputOverflowed: result = "Input overflowed"; break; + case paOutputUnderflowed: result = "Output underflowed"; break; + case paHostApiNotFound: result = "Host API not found"; break; + case paInvalidHostApi: result = "Invalid host API"; break; + case paCanNotReadFromACallbackStream: result = "Can't read from a callback stream"; break; + case paCanNotWriteToACallbackStream: result = "Can't write to a callback stream"; break; + case paCanNotReadFromAnOutputOnlyStream: result = "Can't read from an output only stream"; break; + case paCanNotWriteToAnInputOnlyStream: result = "Can't write to an input only stream"; break; + case paIncompatibleStreamHostApi: result = "Incompatible stream host API"; break; + case paBadBufferPtr: result = "Bad buffer pointer"; break; + default: + if( errorCode > 0 ) + result = "Invalid error code (value greater than zero)"; + else + result = "Invalid error code"; + break; + } + return result; +} + + +PaHostApiIndex Pa_HostApiTypeIdToHostApiIndex( PaHostApiTypeId type ) +{ + PaHostApiIndex result; + int i; + + PA_LOGAPI_ENTER_PARAMS( "Pa_HostApiTypeIdToHostApiIndex" ); + PA_LOGAPI(("\tPaHostApiTypeId type: %d\n", type )); + + if( !PA_IS_INITIALISED_ ) + { + result = paNotInitialized; + } + else + { + result = paHostApiNotFound; + + for( i=0; i < hostApisCount_; ++i ) + { + if( hostApis_[i]->info.type == type ) + { + result = i; + break; + } + } + } + + PA_LOGAPI_EXIT_PAERROR_OR_T_RESULT( "Pa_HostApiTypeIdToHostApiIndex", "PaHostApiIndex: %d", result ); + + return result; +} + + +PaError PaUtil_GetHostApiRepresentation( struct PaUtilHostApiRepresentation **hostApi, + PaHostApiTypeId type ) +{ + PaError result; + int i; + + if( !PA_IS_INITIALISED_ ) + { + result = paNotInitialized; + } + else + { + result = paHostApiNotFound; + + for( i=0; i < hostApisCount_; ++i ) + { + if( hostApis_[i]->info.type == type ) + { + *hostApi = hostApis_[i]; + result = paNoError; + break; + } + } + } + + return result; +} + + +PaError PaUtil_DeviceIndexToHostApiDeviceIndex( + PaDeviceIndex *hostApiDevice, PaDeviceIndex device, struct PaUtilHostApiRepresentation *hostApi ) +{ + PaError result; + PaDeviceIndex x; + + x = device - hostApi->privatePaFrontInfo.baseDeviceIndex; + + if( x < 0 || x >= hostApi->info.deviceCount ) + { + result = paInvalidDevice; + } + else + { + *hostApiDevice = x; + result = paNoError; + } + + return result; +} + + +PaHostApiIndex Pa_GetHostApiCount( void ) +{ + int result; + + PA_LOGAPI_ENTER( "Pa_GetHostApiCount" ); + + if( !PA_IS_INITIALISED_ ) + { + result = paNotInitialized; + } + else + { + result = hostApisCount_; + } + + PA_LOGAPI_EXIT_PAERROR_OR_T_RESULT( "Pa_GetHostApiCount", "PaHostApiIndex: %d", result ); + + return result; +} + + +PaHostApiIndex Pa_GetDefaultHostApi( void ) +{ + int result; + + PA_LOGAPI_ENTER( "Pa_GetDefaultHostApi" ); + + if( !PA_IS_INITIALISED_ ) + { + result = paNotInitialized; + } + else + { + result = defaultHostApiIndex_; + + /* internal consistency check: make sure that the default host api + index is within range */ + + if( result < 0 || result >= hostApisCount_ ) + { + result = paInternalError; + } + } + + PA_LOGAPI_EXIT_PAERROR_OR_T_RESULT( "Pa_GetDefaultHostApi", "PaHostApiIndex: %d", result ); + + return result; +} + + +const PaHostApiInfo* Pa_GetHostApiInfo( PaHostApiIndex hostApi ) +{ + PaHostApiInfo *info; + + PA_LOGAPI_ENTER_PARAMS( "Pa_GetHostApiInfo" ); + PA_LOGAPI(("\tPaHostApiIndex hostApi: %d\n", hostApi )); + + if( !PA_IS_INITIALISED_ ) + { + info = NULL; + + PA_LOGAPI(("Pa_GetHostApiInfo returned:\n" )); + PA_LOGAPI(("\tPaHostApiInfo*: NULL [ PortAudio not initialized ]\n" )); + + } + else if( hostApi < 0 || hostApi >= hostApisCount_ ) + { + info = NULL; + + PA_LOGAPI(("Pa_GetHostApiInfo returned:\n" )); + PA_LOGAPI(("\tPaHostApiInfo*: NULL [ hostApi out of range ]\n" )); + + } + else + { + info = &hostApis_[hostApi]->info; + + PA_LOGAPI(("Pa_GetHostApiInfo returned:\n" )); + PA_LOGAPI(("\tPaHostApiInfo*: 0x%p\n", info )); + PA_LOGAPI(("\t{\n" )); + PA_LOGAPI(("\t\tint structVersion: %d\n", info->structVersion )); + PA_LOGAPI(("\t\tPaHostApiTypeId type: %d\n", info->type )); + PA_LOGAPI(("\t\tconst char *name: %s\n", info->name )); + PA_LOGAPI(("\t}\n" )); + + } + + return info; +} + + +PaDeviceIndex Pa_HostApiDeviceIndexToDeviceIndex( PaHostApiIndex hostApi, int hostApiDeviceIndex ) +{ + PaDeviceIndex result; + + PA_LOGAPI_ENTER_PARAMS( "Pa_HostApiDeviceIndexToPaDeviceIndex" ); + PA_LOGAPI(("\tPaHostApiIndex hostApi: %d\n", hostApi )); + PA_LOGAPI(("\tint hostApiDeviceIndex: %d\n", hostApiDeviceIndex )); + + if( !PA_IS_INITIALISED_ ) + { + result = paNotInitialized; + } + else + { + if( hostApi < 0 || hostApi >= hostApisCount_ ) + { + result = paInvalidHostApi; + } + else + { + if( hostApiDeviceIndex < 0 || + hostApiDeviceIndex >= hostApis_[hostApi]->info.deviceCount ) + { + result = paInvalidDevice; + } + else + { + result = hostApis_[hostApi]->privatePaFrontInfo.baseDeviceIndex + hostApiDeviceIndex; + } + } + } + + PA_LOGAPI_EXIT_PAERROR_OR_T_RESULT( "Pa_HostApiDeviceIndexToPaDeviceIndex", "PaDeviceIndex: %d", result ); + + return result; +} + + +PaDeviceIndex Pa_GetDeviceCount( void ) +{ + PaDeviceIndex result; + + PA_LOGAPI_ENTER( "Pa_GetDeviceCount" ); + + if( !PA_IS_INITIALISED_ ) + { + result = paNotInitialized; + } + else + { + result = deviceCount_; + } + + PA_LOGAPI_EXIT_PAERROR_OR_T_RESULT( "Pa_GetDeviceCount", "PaDeviceIndex: %d", result ); + + return result; +} + + +PaDeviceIndex Pa_GetDefaultInputDevice( void ) +{ + PaHostApiIndex hostApi; + PaDeviceIndex result; + + PA_LOGAPI_ENTER( "Pa_GetDefaultInputDevice" ); + + hostApi = Pa_GetDefaultHostApi(); + if( hostApi < 0 ) + { + result = paNoDevice; + } + else + { + result = hostApis_[hostApi]->info.defaultInputDevice; + } + + PA_LOGAPI_EXIT_T( "Pa_GetDefaultInputDevice", "PaDeviceIndex: %d", result ); + + return result; +} + + +PaDeviceIndex Pa_GetDefaultOutputDevice( void ) +{ + PaHostApiIndex hostApi; + PaDeviceIndex result; + + PA_LOGAPI_ENTER( "Pa_GetDefaultOutputDevice" ); + + hostApi = Pa_GetDefaultHostApi(); + if( hostApi < 0 ) + { + result = paNoDevice; + } + else + { + result = hostApis_[hostApi]->info.defaultOutputDevice; + } + + PA_LOGAPI_EXIT_T( "Pa_GetDefaultOutputDevice", "PaDeviceIndex: %d", result ); + + return result; +} + + +const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceIndex device ) +{ + int hostSpecificDeviceIndex; + int hostApiIndex = FindHostApi( device, &hostSpecificDeviceIndex ); + PaDeviceInfo *result; + + + PA_LOGAPI_ENTER_PARAMS( "Pa_GetDeviceInfo" ); + PA_LOGAPI(("\tPaDeviceIndex device: %d\n", device )); + + if( hostApiIndex < 0 ) + { + result = NULL; + + PA_LOGAPI(("Pa_GetDeviceInfo returned:\n" )); + PA_LOGAPI(("\tPaDeviceInfo* NULL [ invalid device index ]\n" )); + + } + else + { + result = hostApis_[hostApiIndex]->deviceInfos[ hostSpecificDeviceIndex ]; + + PA_LOGAPI(("Pa_GetDeviceInfo returned:\n" )); + PA_LOGAPI(("\tPaDeviceInfo*: 0x%p:\n", result )); + PA_LOGAPI(("\t{\n" )); + + PA_LOGAPI(("\t\tint structVersion: %d\n", result->structVersion )); + PA_LOGAPI(("\t\tconst char *name: %s\n", result->name )); + PA_LOGAPI(("\t\tPaHostApiIndex hostApi: %d\n", result->hostApi )); + PA_LOGAPI(("\t\tint maxInputChannels: %d\n", result->maxInputChannels )); + PA_LOGAPI(("\t\tint maxOutputChannels: %d\n", result->maxOutputChannels )); + PA_LOGAPI(("\t}\n" )); + + } + + return result; +} + + +/* + SampleFormatIsValid() returns 1 if sampleFormat is a sample format + defined in portaudio.h, or 0 otherwise. +*/ +static int SampleFormatIsValid( PaSampleFormat format ) +{ + switch( format & ~paNonInterleaved ) + { + case paFloat32: return 1; + case paInt16: return 1; + case paInt32: return 1; + case paInt24: return 1; + case paInt8: return 1; + case paUInt8: return 1; + case paCustomFormat: return 1; + default: return 0; + } +} + +/* + NOTE: make sure this validation list is kept synchronised with the one in + pa_hostapi.h + + ValidateOpenStreamParameters() checks that parameters to Pa_OpenStream() + conform to the expected values as described below. This function is + also designed to be used with the proposed Pa_IsFormatSupported() function. + + There are basically two types of validation that could be performed: + Generic conformance validation, and device capability mismatch + validation. This function performs only generic conformance validation. + Validation that would require knowledge of device capabilities is + not performed because of potentially complex relationships between + combinations of parameters - for example, even if the sampleRate + seems ok, it might not be for a duplex stream - we have no way of + checking this in an API-neutral way, so we don't try. + + On success the function returns PaNoError and fills in hostApi, + hostApiInputDeviceID, and hostApiOutputDeviceID fields. On failure + the function returns an error code indicating the first encountered + parameter error. + + + If ValidateOpenStreamParameters() returns paNoError, the following + assertions are guaranteed to be true. + + - at least one of inputParameters & outputParmeters is valid (not NULL) + + - if inputParameters & outputParameters are both valid, that + inputParameters->device & outputParameters->device both use the same host api + + PaDeviceIndex inputParameters->device + - is within range (0 to Pa_GetDeviceCount-1) Or: + - is paUseHostApiSpecificDeviceSpecification and + inputParameters->hostApiSpecificStreamInfo is non-NULL and refers + to a valid host api + + int inputParameters->channelCount + - if inputParameters->device is not paUseHostApiSpecificDeviceSpecification, channelCount is > 0 + - upper bound is NOT validated against device capabilities + + PaSampleFormat inputParameters->sampleFormat + - is one of the sample formats defined in portaudio.h + + void *inputParameters->hostApiSpecificStreamInfo + - if supplied its hostApi field matches the input device's host Api + + PaDeviceIndex outputParmeters->device + - is within range (0 to Pa_GetDeviceCount-1) + + int outputParmeters->channelCount + - if inputDevice is valid, channelCount is > 0 + - upper bound is NOT validated against device capabilities + + PaSampleFormat outputParmeters->sampleFormat + - is one of the sample formats defined in portaudio.h + + void *outputParmeters->hostApiSpecificStreamInfo + - if supplied its hostApi field matches the output device's host Api + + double sampleRate + - is not an 'absurd' rate (less than 1000. or greater than 384000.) + - sampleRate is NOT validated against device capabilities + + PaStreamFlags streamFlags + - unused platform neutral flags are zero + - paNeverDropInput is only used for full-duplex callback streams with + variable buffer size (paFramesPerBufferUnspecified) +*/ +static PaError ValidateOpenStreamParameters( + const PaStreamParameters *inputParameters, + const PaStreamParameters *outputParameters, + double sampleRate, + unsigned long framesPerBuffer, + PaStreamFlags streamFlags, + PaStreamCallback *streamCallback, + PaUtilHostApiRepresentation **hostApi, + PaDeviceIndex *hostApiInputDevice, + PaDeviceIndex *hostApiOutputDevice ) +{ + int inputHostApiIndex = -1; /* Suppress uninitialised var warnings: compiler does */ + int outputHostApiIndex = -1; /* not see that if inputParameters and outputParameters */ + /* are both nonzero, these indices are set. */ + + if( (inputParameters == NULL) && (outputParameters == NULL) ) + { + return paInvalidDevice; /** @todo should be a new error code "invalid device parameters" or something */ + } + else + { + if( inputParameters == NULL ) + { + *hostApiInputDevice = paNoDevice; + } + else if( inputParameters->device == paUseHostApiSpecificDeviceSpecification ) + { + if( inputParameters->hostApiSpecificStreamInfo ) + { + inputHostApiIndex = Pa_HostApiTypeIdToHostApiIndex( + ((PaUtilHostApiSpecificStreamInfoHeader*)inputParameters->hostApiSpecificStreamInfo)->hostApiType ); + + if( inputHostApiIndex != -1 ) + { + *hostApiInputDevice = paUseHostApiSpecificDeviceSpecification; + *hostApi = hostApis_[inputHostApiIndex]; + } + else + { + return paInvalidDevice; + } + } + else + { + return paInvalidDevice; + } + } + else + { + if( inputParameters->device < 0 || inputParameters->device >= deviceCount_ ) + return paInvalidDevice; + + inputHostApiIndex = FindHostApi( inputParameters->device, hostApiInputDevice ); + if( inputHostApiIndex < 0 ) + return paInternalError; + + *hostApi = hostApis_[inputHostApiIndex]; + + if( inputParameters->channelCount <= 0 ) + return paInvalidChannelCount; + + if( !SampleFormatIsValid( inputParameters->sampleFormat ) ) + return paSampleFormatNotSupported; + + if( inputParameters->hostApiSpecificStreamInfo != NULL ) + { + if( ((PaUtilHostApiSpecificStreamInfoHeader*)inputParameters->hostApiSpecificStreamInfo)->hostApiType + != (*hostApi)->info.type ) + return paIncompatibleHostApiSpecificStreamInfo; + } + } + + if( outputParameters == NULL ) + { + *hostApiOutputDevice = paNoDevice; + } + else if( outputParameters->device == paUseHostApiSpecificDeviceSpecification ) + { + if( outputParameters->hostApiSpecificStreamInfo ) + { + outputHostApiIndex = Pa_HostApiTypeIdToHostApiIndex( + ((PaUtilHostApiSpecificStreamInfoHeader*)outputParameters->hostApiSpecificStreamInfo)->hostApiType ); + + if( outputHostApiIndex != -1 ) + { + *hostApiOutputDevice = paUseHostApiSpecificDeviceSpecification; + *hostApi = hostApis_[outputHostApiIndex]; + } + else + { + return paInvalidDevice; + } + } + else + { + return paInvalidDevice; + } + } + else + { + if( outputParameters->device < 0 || outputParameters->device >= deviceCount_ ) + return paInvalidDevice; + + outputHostApiIndex = FindHostApi( outputParameters->device, hostApiOutputDevice ); + if( outputHostApiIndex < 0 ) + return paInternalError; + + *hostApi = hostApis_[outputHostApiIndex]; + + if( outputParameters->channelCount <= 0 ) + return paInvalidChannelCount; + + if( !SampleFormatIsValid( outputParameters->sampleFormat ) ) + return paSampleFormatNotSupported; + + if( outputParameters->hostApiSpecificStreamInfo != NULL ) + { + if( ((PaUtilHostApiSpecificStreamInfoHeader*)outputParameters->hostApiSpecificStreamInfo)->hostApiType + != (*hostApi)->info.type ) + return paIncompatibleHostApiSpecificStreamInfo; + } + } + + if( (inputParameters != NULL) && (outputParameters != NULL) ) + { + /* ensure that both devices use the same API */ + if( inputHostApiIndex != outputHostApiIndex ) + return paBadIODeviceCombination; + } + } + + + /* Check for absurd sample rates. */ + if( (sampleRate < 1000.0) || (sampleRate > 384000.0) ) + return paInvalidSampleRate; + + if( ((streamFlags & ~paPlatformSpecificFlags) & ~(paClipOff | paDitherOff | paNeverDropInput | paPrimeOutputBuffersUsingStreamCallback ) ) != 0 ) + return paInvalidFlag; + + if( streamFlags & paNeverDropInput ) + { + /* must be a callback stream */ + if( !streamCallback ) + return paInvalidFlag; + + /* must be a full duplex stream */ + if( (inputParameters == NULL) || (outputParameters == NULL) ) + return paInvalidFlag; + + /* must use paFramesPerBufferUnspecified */ + if( framesPerBuffer != paFramesPerBufferUnspecified ) + return paInvalidFlag; + } + + return paNoError; +} + + +PaError Pa_IsFormatSupported( const PaStreamParameters *inputParameters, + const PaStreamParameters *outputParameters, + double sampleRate ) +{ + PaError result; + PaUtilHostApiRepresentation *hostApi = 0; + PaDeviceIndex hostApiInputDevice = paNoDevice, hostApiOutputDevice = paNoDevice; + PaStreamParameters hostApiInputParameters, hostApiOutputParameters; + PaStreamParameters *hostApiInputParametersPtr, *hostApiOutputParametersPtr; + + +#ifdef PA_LOG_API_CALLS + PA_LOGAPI_ENTER_PARAMS( "Pa_IsFormatSupported" ); + + if( inputParameters == NULL ){ + PA_LOGAPI(("\tPaStreamParameters *inputParameters: NULL\n" )); + }else{ + PA_LOGAPI(("\tPaStreamParameters *inputParameters: 0x%p\n", inputParameters )); + PA_LOGAPI(("\tPaDeviceIndex inputParameters->device: %d\n", inputParameters->device )); + PA_LOGAPI(("\tint inputParameters->channelCount: %d\n", inputParameters->channelCount )); + PA_LOGAPI(("\tPaSampleFormat inputParameters->sampleFormat: %d\n", inputParameters->sampleFormat )); + PA_LOGAPI(("\tPaTime inputParameters->suggestedLatency: %f\n", inputParameters->suggestedLatency )); + PA_LOGAPI(("\tvoid *inputParameters->hostApiSpecificStreamInfo: 0x%p\n", inputParameters->hostApiSpecificStreamInfo )); + } + + if( outputParameters == NULL ){ + PA_LOGAPI(("\tPaStreamParameters *outputParameters: NULL\n" )); + }else{ + PA_LOGAPI(("\tPaStreamParameters *outputParameters: 0x%p\n", outputParameters )); + PA_LOGAPI(("\tPaDeviceIndex outputParameters->device: %d\n", outputParameters->device )); + PA_LOGAPI(("\tint outputParameters->channelCount: %d\n", outputParameters->channelCount )); + PA_LOGAPI(("\tPaSampleFormat outputParameters->sampleFormat: %d\n", outputParameters->sampleFormat )); + PA_LOGAPI(("\tPaTime outputParameters->suggestedLatency: %f\n", outputParameters->suggestedLatency )); + PA_LOGAPI(("\tvoid *outputParameters->hostApiSpecificStreamInfo: 0x%p\n", outputParameters->hostApiSpecificStreamInfo )); + } + + PA_LOGAPI(("\tdouble sampleRate: %g\n", sampleRate )); +#endif + + if( !PA_IS_INITIALISED_ ) + { + result = paNotInitialized; + + PA_LOGAPI_EXIT_PAERROR( "Pa_IsFormatSupported", result ); + return result; + } + + result = ValidateOpenStreamParameters( inputParameters, + outputParameters, + sampleRate, 0, paNoFlag, 0, + &hostApi, + &hostApiInputDevice, + &hostApiOutputDevice ); + if( result != paNoError ) + { + PA_LOGAPI_EXIT_PAERROR( "Pa_IsFormatSupported", result ); + return result; + } + + + if( inputParameters ) + { + hostApiInputParameters.device = hostApiInputDevice; + hostApiInputParameters.channelCount = inputParameters->channelCount; + hostApiInputParameters.sampleFormat = inputParameters->sampleFormat; + hostApiInputParameters.suggestedLatency = inputParameters->suggestedLatency; + hostApiInputParameters.hostApiSpecificStreamInfo = inputParameters->hostApiSpecificStreamInfo; + hostApiInputParametersPtr = &hostApiInputParameters; + } + else + { + hostApiInputParametersPtr = NULL; + } + + if( outputParameters ) + { + hostApiOutputParameters.device = hostApiOutputDevice; + hostApiOutputParameters.channelCount = outputParameters->channelCount; + hostApiOutputParameters.sampleFormat = outputParameters->sampleFormat; + hostApiOutputParameters.suggestedLatency = outputParameters->suggestedLatency; + hostApiOutputParameters.hostApiSpecificStreamInfo = outputParameters->hostApiSpecificStreamInfo; + hostApiOutputParametersPtr = &hostApiOutputParameters; + } + else + { + hostApiOutputParametersPtr = NULL; + } + + result = hostApi->IsFormatSupported( hostApi, + hostApiInputParametersPtr, hostApiOutputParametersPtr, + sampleRate ); + +#ifdef PA_LOG_API_CALLS + PA_LOGAPI(("Pa_OpenStream returned:\n" )); + if( result == paFormatIsSupported ) + PA_LOGAPI(("\tPaError: 0 [ paFormatIsSupported ]\n" )); + else + PA_LOGAPI(("\tPaError: %d ( %s )\n", result, Pa_GetErrorText( result ) )); +#endif + + return result; +} + + +PaError Pa_OpenStream( PaStream** stream, + const PaStreamParameters *inputParameters, + const PaStreamParameters *outputParameters, + double sampleRate, + unsigned long framesPerBuffer, + PaStreamFlags streamFlags, + PaStreamCallback *streamCallback, + void *userData ) +{ + PaError result; + PaUtilHostApiRepresentation *hostApi = 0; + PaDeviceIndex hostApiInputDevice = paNoDevice, hostApiOutputDevice = paNoDevice; + PaStreamParameters hostApiInputParameters, hostApiOutputParameters; + PaStreamParameters *hostApiInputParametersPtr, *hostApiOutputParametersPtr; + + +#ifdef PA_LOG_API_CALLS + PA_LOGAPI_ENTER_PARAMS( "Pa_OpenStream" ); + PA_LOGAPI(("\tPaStream** stream: 0x%p\n", stream )); + + if( inputParameters == NULL ){ + PA_LOGAPI(("\tPaStreamParameters *inputParameters: NULL\n" )); + }else{ + PA_LOGAPI(("\tPaStreamParameters *inputParameters: 0x%p\n", inputParameters )); + PA_LOGAPI(("\tPaDeviceIndex inputParameters->device: %d\n", inputParameters->device )); + PA_LOGAPI(("\tint inputParameters->channelCount: %d\n", inputParameters->channelCount )); + PA_LOGAPI(("\tPaSampleFormat inputParameters->sampleFormat: %d\n", inputParameters->sampleFormat )); + PA_LOGAPI(("\tPaTime inputParameters->suggestedLatency: %f\n", inputParameters->suggestedLatency )); + PA_LOGAPI(("\tvoid *inputParameters->hostApiSpecificStreamInfo: 0x%p\n", inputParameters->hostApiSpecificStreamInfo )); + } + + if( outputParameters == NULL ){ + PA_LOGAPI(("\tPaStreamParameters *outputParameters: NULL\n" )); + }else{ + PA_LOGAPI(("\tPaStreamParameters *outputParameters: 0x%p\n", outputParameters )); + PA_LOGAPI(("\tPaDeviceIndex outputParameters->device: %d\n", outputParameters->device )); + PA_LOGAPI(("\tint outputParameters->channelCount: %d\n", outputParameters->channelCount )); + PA_LOGAPI(("\tPaSampleFormat outputParameters->sampleFormat: %d\n", outputParameters->sampleFormat )); + PA_LOGAPI(("\tPaTime outputParameters->suggestedLatency: %f\n", outputParameters->suggestedLatency )); + PA_LOGAPI(("\tvoid *outputParameters->hostApiSpecificStreamInfo: 0x%p\n", outputParameters->hostApiSpecificStreamInfo )); + } + + PA_LOGAPI(("\tdouble sampleRate: %g\n", sampleRate )); + PA_LOGAPI(("\tunsigned long framesPerBuffer: %d\n", framesPerBuffer )); + PA_LOGAPI(("\tPaStreamFlags streamFlags: 0x%x\n", streamFlags )); + PA_LOGAPI(("\tPaStreamCallback *streamCallback: 0x%p\n", streamCallback )); + PA_LOGAPI(("\tvoid *userData: 0x%p\n", userData )); +#endif + + if( !PA_IS_INITIALISED_ ) + { + result = paNotInitialized; + + PA_LOGAPI(("Pa_OpenStream returned:\n" )); + PA_LOGAPI(("\t*(PaStream** stream): undefined\n" )); + PA_LOGAPI(("\tPaError: %d ( %s )\n", result, Pa_GetErrorText( result ) )); + return result; + } + + /* Check for parameter errors. + NOTE: make sure this validation list is kept synchronised with the one + in pa_hostapi.h + */ + + if( stream == NULL ) + { + result = paBadStreamPtr; + + PA_LOGAPI(("Pa_OpenStream returned:\n" )); + PA_LOGAPI(("\t*(PaStream** stream): undefined\n" )); + PA_LOGAPI(("\tPaError: %d ( %s )\n", result, Pa_GetErrorText( result ) )); + return result; + } + + result = ValidateOpenStreamParameters( inputParameters, + outputParameters, + sampleRate, framesPerBuffer, + streamFlags, streamCallback, + &hostApi, + &hostApiInputDevice, + &hostApiOutputDevice ); + if( result != paNoError ) + { + PA_LOGAPI(("Pa_OpenStream returned:\n" )); + PA_LOGAPI(("\t*(PaStream** stream): undefined\n" )); + PA_LOGAPI(("\tPaError: %d ( %s )\n", result, Pa_GetErrorText( result ) )); + return result; + } + + + if( inputParameters ) + { + hostApiInputParameters.device = hostApiInputDevice; + hostApiInputParameters.channelCount = inputParameters->channelCount; + hostApiInputParameters.sampleFormat = inputParameters->sampleFormat; + hostApiInputParameters.suggestedLatency = inputParameters->suggestedLatency; + hostApiInputParameters.hostApiSpecificStreamInfo = inputParameters->hostApiSpecificStreamInfo; + hostApiInputParametersPtr = &hostApiInputParameters; + } + else + { + hostApiInputParametersPtr = NULL; + } + + if( outputParameters ) + { + hostApiOutputParameters.device = hostApiOutputDevice; + hostApiOutputParameters.channelCount = outputParameters->channelCount; + hostApiOutputParameters.sampleFormat = outputParameters->sampleFormat; + hostApiOutputParameters.suggestedLatency = outputParameters->suggestedLatency; + hostApiOutputParameters.hostApiSpecificStreamInfo = outputParameters->hostApiSpecificStreamInfo; + hostApiOutputParametersPtr = &hostApiOutputParameters; + } + else + { + hostApiOutputParametersPtr = NULL; + } + + result = hostApi->OpenStream( hostApi, stream, + hostApiInputParametersPtr, hostApiOutputParametersPtr, + sampleRate, framesPerBuffer, streamFlags, streamCallback, userData ); + + if( result == paNoError ) + AddOpenStream( *stream ); + + + PA_LOGAPI(("Pa_OpenStream returned:\n" )); + PA_LOGAPI(("\t*(PaStream** stream): 0x%p\n", *stream )); + PA_LOGAPI(("\tPaError: %d ( %s )\n", result, Pa_GetErrorText( result ) )); + + return result; +} + + +PaError Pa_OpenDefaultStream( PaStream** stream, + int inputChannelCount, + int outputChannelCount, + PaSampleFormat sampleFormat, + double sampleRate, + unsigned long framesPerBuffer, + PaStreamCallback *streamCallback, + void *userData ) +{ + PaError result; + PaStreamParameters hostApiInputParameters, hostApiOutputParameters; + PaStreamParameters *hostApiInputParametersPtr, *hostApiOutputParametersPtr; + + PA_LOGAPI_ENTER_PARAMS( "Pa_OpenDefaultStream" ); + PA_LOGAPI(("\tPaStream** stream: 0x%p\n", stream )); + PA_LOGAPI(("\tint inputChannelCount: %d\n", inputChannelCount )); + PA_LOGAPI(("\tint outputChannelCount: %d\n", outputChannelCount )); + PA_LOGAPI(("\tPaSampleFormat sampleFormat: %d\n", sampleFormat )); + PA_LOGAPI(("\tdouble sampleRate: %g\n", sampleRate )); + PA_LOGAPI(("\tunsigned long framesPerBuffer: %d\n", framesPerBuffer )); + PA_LOGAPI(("\tPaStreamCallback *streamCallback: 0x%p\n", streamCallback )); + PA_LOGAPI(("\tvoid *userData: 0x%p\n", userData )); + + + if( inputChannelCount > 0 ) + { + hostApiInputParameters.device = Pa_GetDefaultInputDevice(); + if( hostApiInputParameters.device == paNoDevice ) + return paDeviceUnavailable; + + hostApiInputParameters.channelCount = inputChannelCount; + hostApiInputParameters.sampleFormat = sampleFormat; + /* defaultHighInputLatency is used below instead of + defaultLowInputLatency because it is more important for the default + stream to work reliably than it is for it to work with the lowest + latency. + */ + hostApiInputParameters.suggestedLatency = + Pa_GetDeviceInfo( hostApiInputParameters.device )->defaultHighInputLatency; + hostApiInputParameters.hostApiSpecificStreamInfo = NULL; + hostApiInputParametersPtr = &hostApiInputParameters; + } + else + { + hostApiInputParametersPtr = NULL; + } + + if( outputChannelCount > 0 ) + { + hostApiOutputParameters.device = Pa_GetDefaultOutputDevice(); + if( hostApiOutputParameters.device == paNoDevice ) + return paDeviceUnavailable; + + hostApiOutputParameters.channelCount = outputChannelCount; + hostApiOutputParameters.sampleFormat = sampleFormat; + /* defaultHighOutputLatency is used below instead of + defaultLowOutputLatency because it is more important for the default + stream to work reliably than it is for it to work with the lowest + latency. + */ + hostApiOutputParameters.suggestedLatency = + Pa_GetDeviceInfo( hostApiOutputParameters.device )->defaultHighOutputLatency; + hostApiOutputParameters.hostApiSpecificStreamInfo = NULL; + hostApiOutputParametersPtr = &hostApiOutputParameters; + } + else + { + hostApiOutputParametersPtr = NULL; + } + + + result = Pa_OpenStream( + stream, hostApiInputParametersPtr, hostApiOutputParametersPtr, + sampleRate, framesPerBuffer, paNoFlag, streamCallback, userData ); + + PA_LOGAPI(("Pa_OpenDefaultStream returned:\n" )); + PA_LOGAPI(("\t*(PaStream** stream): 0x%p", *stream )); + PA_LOGAPI(("\tPaError: %d ( %s )\n", result, Pa_GetErrorText( result ) )); + + return result; +} + + +PaError PaUtil_ValidateStreamPointer( PaStream* stream ) +{ + if( !PA_IS_INITIALISED_ ) return paNotInitialized; + + if( stream == NULL ) return paBadStreamPtr; + + if( ((PaUtilStreamRepresentation*)stream)->magic != PA_STREAM_MAGIC ) + return paBadStreamPtr; + + return paNoError; +} + + +PaError Pa_CloseStream( PaStream* stream ) +{ + PaUtilStreamInterface *interface; + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_CloseStream" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + /* always remove the open stream from our list, even if this function + eventually returns an error. Otherwise CloseOpenStreams() will + get stuck in an infinite loop */ + RemoveOpenStream( stream ); /* be sure to call this _before_ closing the stream */ + + if( result == paNoError ) + { + interface = PA_STREAM_INTERFACE(stream); + + /* abort the stream if it isn't stopped */ + result = interface->IsStopped( stream ); + if( result == 1 ) + result = paNoError; + else if( result == 0 ) + result = interface->Abort( stream ); + + if( result == paNoError ) /** @todo REVIEW: shouldn't we close anyway? see: http://www.portaudio.com/trac/ticket/115 */ + result = interface->Close( stream ); + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_CloseStream", result ); + + return result; +} + + +PaError Pa_SetStreamFinishedCallback( PaStream *stream, PaStreamFinishedCallback* streamFinishedCallback ) +{ + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_SetStreamFinishedCallback" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + PA_LOGAPI(("\tPaStreamFinishedCallback* streamFinishedCallback: 0x%p\n", streamFinishedCallback )); + + if( result == paNoError ) + { + result = PA_STREAM_INTERFACE(stream)->IsStopped( stream ); + if( result == 0 ) + { + result = paStreamIsNotStopped ; + } + if( result == 1 ) + { + PA_STREAM_REP( stream )->streamFinishedCallback = streamFinishedCallback; + result = paNoError; + } + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_SetStreamFinishedCallback", result ); + + return result; + +} + + +PaError Pa_StartStream( PaStream *stream ) +{ + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_StartStream" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( result == paNoError ) + { + result = PA_STREAM_INTERFACE(stream)->IsStopped( stream ); + if( result == 0 ) + { + result = paStreamIsNotStopped ; + } + else if( result == 1 ) + { + result = PA_STREAM_INTERFACE(stream)->Start( stream ); + } + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_StartStream", result ); + + return result; +} + + +PaError Pa_StopStream( PaStream *stream ) +{ + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_StopStream" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( result == paNoError ) + { + result = PA_STREAM_INTERFACE(stream)->IsStopped( stream ); + if( result == 0 ) + { + result = PA_STREAM_INTERFACE(stream)->Stop( stream ); + } + else if( result == 1 ) + { + result = paStreamIsStopped; + } + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_StopStream", result ); + + return result; +} + + +PaError Pa_AbortStream( PaStream *stream ) +{ + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_AbortStream" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( result == paNoError ) + { + result = PA_STREAM_INTERFACE(stream)->IsStopped( stream ); + if( result == 0 ) + { + result = PA_STREAM_INTERFACE(stream)->Abort( stream ); + } + else if( result == 1 ) + { + result = paStreamIsStopped; + } + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_AbortStream", result ); + + return result; +} + + +PaError Pa_IsStreamStopped( PaStream *stream ) +{ + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_IsStreamStopped" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( result == paNoError ) + result = PA_STREAM_INTERFACE(stream)->IsStopped( stream ); + + PA_LOGAPI_EXIT_PAERROR( "Pa_IsStreamStopped", result ); + + return result; +} + + +PaError Pa_IsStreamActive( PaStream *stream ) +{ + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_IsStreamActive" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( result == paNoError ) + result = PA_STREAM_INTERFACE(stream)->IsActive( stream ); + + + PA_LOGAPI_EXIT_PAERROR( "Pa_IsStreamActive", result ); + + return result; +} + + +const PaStreamInfo* Pa_GetStreamInfo( PaStream *stream ) +{ + PaError error = PaUtil_ValidateStreamPointer( stream ); + const PaStreamInfo *result; + + PA_LOGAPI_ENTER_PARAMS( "Pa_GetStreamInfo" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( error != paNoError ) + { + result = 0; + + PA_LOGAPI(("Pa_GetStreamInfo returned:\n" )); + PA_LOGAPI(("\tconst PaStreamInfo*: 0 [PaError error:%d ( %s )]\n", error, Pa_GetErrorText( error ) )); + + } + else + { + result = &PA_STREAM_REP( stream )->streamInfo; + + PA_LOGAPI(("Pa_GetStreamInfo returned:\n" )); + PA_LOGAPI(("\tconst PaStreamInfo*: 0x%p:\n", result )); + PA_LOGAPI(("\t{" )); + + PA_LOGAPI(("\t\tint structVersion: %d\n", result->structVersion )); + PA_LOGAPI(("\t\tPaTime inputLatency: %f\n", result->inputLatency )); + PA_LOGAPI(("\t\tPaTime outputLatency: %f\n", result->outputLatency )); + PA_LOGAPI(("\t\tdouble sampleRate: %f\n", result->sampleRate )); + PA_LOGAPI(("\t}\n" )); + + } + + return result; +} + + +PaTime Pa_GetStreamTime( PaStream *stream ) +{ + PaError error = PaUtil_ValidateStreamPointer( stream ); + PaTime result; + + PA_LOGAPI_ENTER_PARAMS( "Pa_GetStreamTime" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( error != paNoError ) + { + result = 0; + + PA_LOGAPI(("Pa_GetStreamTime returned:\n" )); + PA_LOGAPI(("\tPaTime: 0 [PaError error:%d ( %s )]\n", result, error, Pa_GetErrorText( error ) )); + + } + else + { + result = PA_STREAM_INTERFACE(stream)->GetTime( stream ); + + PA_LOGAPI(("Pa_GetStreamTime returned:\n" )); + PA_LOGAPI(("\tPaTime: %g\n", result )); + + } + + return result; +} + + +double Pa_GetStreamCpuLoad( PaStream* stream ) +{ + PaError error = PaUtil_ValidateStreamPointer( stream ); + double result; + + PA_LOGAPI_ENTER_PARAMS( "Pa_GetStreamCpuLoad" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( error != paNoError ) + { + + result = 0.0; + + PA_LOGAPI(("Pa_GetStreamCpuLoad returned:\n" )); + PA_LOGAPI(("\tdouble: 0.0 [PaError error: %d ( %s )]\n", error, Pa_GetErrorText( error ) )); + + } + else + { + result = PA_STREAM_INTERFACE(stream)->GetCpuLoad( stream ); + + PA_LOGAPI(("Pa_GetStreamCpuLoad returned:\n" )); + PA_LOGAPI(("\tdouble: %g\n", result )); + + } + + return result; +} + + +PaError Pa_ReadStream( PaStream* stream, + void *buffer, + unsigned long frames ) +{ + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_ReadStream" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( result == paNoError ) + { + if( frames == 0 ) + { + /* @todo Should we not allow the implementation to signal any overflow condition? see: http://www.portaudio.com/trac/ticket/116*/ + result = paNoError; + } + else if( buffer == 0 ) + { + result = paBadBufferPtr; + } + else + { + result = PA_STREAM_INTERFACE(stream)->IsStopped( stream ); + if( result == 0 ) + { + result = PA_STREAM_INTERFACE(stream)->Read( stream, buffer, frames ); + } + else if( result == 1 ) + { + result = paStreamIsStopped; + } + } + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_ReadStream", result ); + + return result; +} + + +PaError Pa_WriteStream( PaStream* stream, + const void *buffer, + unsigned long frames ) +{ + PaError result = PaUtil_ValidateStreamPointer( stream ); + + PA_LOGAPI_ENTER_PARAMS( "Pa_WriteStream" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( result == paNoError ) + { + if( frames == 0 ) + { + /* @todo Should we not allow the implementation to signal any underflow condition? see: http://www.portaudio.com/trac/ticket/116*/ + result = paNoError; + } + else if( buffer == 0 ) + { + result = paBadBufferPtr; + } + else + { + result = PA_STREAM_INTERFACE(stream)->IsStopped( stream ); + if( result == 0 ) + { + result = PA_STREAM_INTERFACE(stream)->Write( stream, buffer, frames ); + } + else if( result == 1 ) + { + result = paStreamIsStopped; + } + } + } + + PA_LOGAPI_EXIT_PAERROR( "Pa_WriteStream", result ); + + return result; +} + +signed long Pa_GetStreamReadAvailable( PaStream* stream ) +{ + PaError error = PaUtil_ValidateStreamPointer( stream ); + signed long result; + + PA_LOGAPI_ENTER_PARAMS( "Pa_GetStreamReadAvailable" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( error != paNoError ) + { + result = 0; + + PA_LOGAPI(("Pa_GetStreamReadAvailable returned:\n" )); + PA_LOGAPI(("\tunsigned long: 0 [ PaError error: %d ( %s ) ]\n", error, Pa_GetErrorText( error ) )); + + } + else + { + result = PA_STREAM_INTERFACE(stream)->GetReadAvailable( stream ); + + PA_LOGAPI(("Pa_GetStreamReadAvailable returned:\n" )); + PA_LOGAPI(("\tPaError: %d ( %s )\n", result, Pa_GetErrorText( result ) )); + + } + + return result; +} + + +signed long Pa_GetStreamWriteAvailable( PaStream* stream ) +{ + PaError error = PaUtil_ValidateStreamPointer( stream ); + signed long result; + + PA_LOGAPI_ENTER_PARAMS( "Pa_GetStreamWriteAvailable" ); + PA_LOGAPI(("\tPaStream* stream: 0x%p\n", stream )); + + if( error != paNoError ) + { + result = 0; + + PA_LOGAPI(("Pa_GetStreamWriteAvailable returned:\n" )); + PA_LOGAPI(("\tunsigned long: 0 [ PaError error: %d ( %s ) ]\n", error, Pa_GetErrorText( error ) )); + + } + else + { + result = PA_STREAM_INTERFACE(stream)->GetWriteAvailable( stream ); + + PA_LOGAPI(("Pa_GetStreamWriteAvailable returned:\n" )); + PA_LOGAPI(("\tPaError: %d ( %s )\n", result, Pa_GetErrorText( result ) )); + + } + + return result; +} + + +PaError Pa_GetSampleSize( PaSampleFormat format ) +{ + int result; + + PA_LOGAPI_ENTER_PARAMS( "Pa_GetSampleSize" ); + PA_LOGAPI(("\tPaSampleFormat format: %d\n", format )); + + switch( format & ~paNonInterleaved ) + { + + case paUInt8: + case paInt8: + result = 1; + break; + + case paInt16: + result = 2; + break; + + case paInt24: + result = 3; + break; + + case paFloat32: + case paInt32: + result = 4; + break; + + default: + result = paSampleFormatNotSupported; + break; + } + + PA_LOGAPI_EXIT_PAERROR_OR_T_RESULT( "Pa_GetSampleSize", "int: %d", result ); + + return (PaError) result; +} |