diff options
Diffstat (limited to 'portaudio/test/patest_dsound_find_best_latency_params.c')
| -rw-r--r-- | portaudio/test/patest_dsound_find_best_latency_params.c | 513 |
1 files changed, 0 insertions, 513 deletions
diff --git a/portaudio/test/patest_dsound_find_best_latency_params.c b/portaudio/test/patest_dsound_find_best_latency_params.c deleted file mode 100644 index 1c074ab..0000000 --- a/portaudio/test/patest_dsound_find_best_latency_params.c +++ /dev/null @@ -1,513 +0,0 @@ -/* - * $Id: $ - * Portable Audio I/O Library - * Windows DirectSound low level buffer user guided parameters search - * - * Copyright (c) 2010-2011 Ross Bencina - * - * 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. - */ - -#include <stdio.h> -#include <time.h> -#include <math.h> - -#define _WIN32_WINNT 0x0501 /* for GetNativeSystemInfo */ -#include <windows.h> -//#include <mmsystem.h> /* required when using pa_win_wmme.h */ - -#include <conio.h> /* for _getch */ - - -#include "portaudio.h" -#include "pa_win_ds.h" - - -#define DEFAULT_SAMPLE_RATE (44100.) - -#ifndef M_PI -#define M_PI (3.14159265) -#endif - -#define TABLE_SIZE (2048) - -#define CHANNEL_COUNT (2) - - -/*******************************************************************/ -/* functions to query and print Windows version information */ - -typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL); - -LPFN_ISWOW64PROCESS fnIsWow64Process; - -static BOOL IsWow64() -{ - BOOL bIsWow64 = FALSE; - - //IsWow64Process is not available on all supported versions of Windows. - //Use GetModuleHandle to get a handle to the DLL that contains the function - //and GetProcAddress to get a pointer to the function if available. - - fnIsWow64Process = (LPFN_ISWOW64PROCESS) GetProcAddress( - GetModuleHandle(TEXT("kernel32")),"IsWow64Process" ); - - if(NULL != fnIsWow64Process) - { - if (!fnIsWow64Process(GetCurrentProcess(),&bIsWow64)) - { - //handle error - } - } - return bIsWow64; -} - -static void printWindowsVersionInfo( FILE *fp ) -{ - OSVERSIONINFOEX osVersionInfoEx; - SYSTEM_INFO systemInfo; - const char *osName = "Unknown"; - const char *osProductType = ""; - const char *processorArchitecture = "Unknown"; - - memset( &osVersionInfoEx, 0, sizeof(OSVERSIONINFOEX) ); - osVersionInfoEx.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); - GetVersionEx( &osVersionInfoEx ); - - - if( osVersionInfoEx.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS ){ - switch( osVersionInfoEx.dwMinorVersion ){ - case 0: osName = "Windows 95"; break; - case 10: osName = "Windows 98"; break; // could also be 98SE (I've seen code discriminate based - // on osInfo.Version.Revision.ToString() == "2222A") - case 90: osName = "Windows Me"; break; - } - }else if( osVersionInfoEx.dwPlatformId == VER_PLATFORM_WIN32_NT ){ - switch( osVersionInfoEx.dwMajorVersion ){ - case 3: osName = "Windows NT 3.51"; break; - case 4: osName = "Windows NT 4.0"; break; - case 5: switch( osVersionInfoEx.dwMinorVersion ){ - case 0: osName = "Windows 2000"; break; - case 1: osName = "Windows XP"; break; - case 2: - if( osVersionInfoEx.wSuiteMask & 0x00008000 /*VER_SUITE_WH_SERVER*/ ){ - osName = "Windows Home Server"; - }else{ - if( osVersionInfoEx.wProductType == VER_NT_WORKSTATION ){ - osName = "Windows XP Professional x64 Edition (?)"; - }else{ - if( GetSystemMetrics(/*SM_SERVERR2*/89) == 0 ) - osName = "Windows Server 2003"; - else - osName = "Windows Server 2003 R2"; - } - }break; - }break; - case 6:switch( osVersionInfoEx.dwMinorVersion ){ - case 0: - if( osVersionInfoEx.wProductType == VER_NT_WORKSTATION ) - osName = "Windows Vista"; - else - osName = "Windows Server 2008"; - break; - case 1: - if( osVersionInfoEx.wProductType == VER_NT_WORKSTATION ) - osName = "Windows 7"; - else - osName = "Windows Server 2008 R2"; - break; - }break; - } - } - - if(osVersionInfoEx.dwMajorVersion == 4) - { - if(osVersionInfoEx.wProductType == VER_NT_WORKSTATION) - osProductType = "Workstation"; - else if(osVersionInfoEx.wProductType == VER_NT_SERVER) - osProductType = "Server"; - } - else if(osVersionInfoEx.dwMajorVersion == 5) - { - if(osVersionInfoEx.wProductType == VER_NT_WORKSTATION) - { - if((osVersionInfoEx.wSuiteMask & VER_SUITE_PERSONAL) == VER_SUITE_PERSONAL) - osProductType = "Home Edition"; // Windows XP Home Edition - else - osProductType = "Professional"; // Windows XP / Windows 2000 Professional - } - else if(osVersionInfoEx.wProductType == VER_NT_SERVER) - { - if(osVersionInfoEx.dwMinorVersion == 0) - { - if((osVersionInfoEx.wSuiteMask & VER_SUITE_DATACENTER) == VER_SUITE_DATACENTER) - osProductType = "Datacenter Server"; // Windows 2000 Datacenter Server - else if((osVersionInfoEx.wSuiteMask & VER_SUITE_ENTERPRISE) == VER_SUITE_ENTERPRISE) - osProductType = "Advanced Server"; // Windows 2000 Advanced Server - else - osProductType = "Server"; // Windows 2000 Server - } - } - else - { - if((osVersionInfoEx.wSuiteMask & VER_SUITE_DATACENTER) == VER_SUITE_DATACENTER) - osProductType = "Datacenter Edition"; // Windows Server 2003 Datacenter Edition - else if((osVersionInfoEx.wSuiteMask & VER_SUITE_ENTERPRISE) == VER_SUITE_ENTERPRISE) - osProductType = "Enterprise Edition"; // Windows Server 2003 Enterprise Edition - else if((osVersionInfoEx.wSuiteMask & VER_SUITE_BLADE) == VER_SUITE_BLADE) - osProductType = "Web Edition"; // Windows Server 2003 Web Edition - else - osProductType = "Standard Edition"; // Windows Server 2003 Standard Edition - } - } - - memset( &systemInfo, 0, sizeof(SYSTEM_INFO) ); - GetNativeSystemInfo( &systemInfo ); - - if( systemInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_INTEL ) - processorArchitecture = "x86"; - else if( systemInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 ) - processorArchitecture = "x64"; - else if( systemInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64 ) - processorArchitecture = "Itanium"; - - - fprintf( fp, "OS name and edition: %s %s\n", osName, osProductType ); - fprintf( fp, "OS version: %d.%d.%d %S\n", - osVersionInfoEx.dwMajorVersion, osVersionInfoEx.dwMinorVersion, - osVersionInfoEx.dwBuildNumber, osVersionInfoEx.szCSDVersion ); - fprintf( fp, "Processor architecture: %s\n", processorArchitecture ); - fprintf( fp, "WoW64 process: %s\n", IsWow64() ? "Yes" : "No" ); -} - -static void printTimeAndDate( FILE *fp ) -{ - struct tm *local; - time_t t; - - t = time(NULL); - local = localtime(&t); - fprintf(fp, "Local time and date: %s", asctime(local)); - local = gmtime(&t); - fprintf(fp, "UTC time and date: %s", asctime(local)); -} - -/*******************************************************************/ - -typedef struct -{ - float sine[TABLE_SIZE]; - double phase; - double phaseIncrement; - volatile int fadeIn; - volatile int fadeOut; - double amp; -} -paTestData; - -static paTestData data; - -/* This routine will be called by the PortAudio engine when audio is needed. -** It may called at interrupt level on some machines so don't do anything -** that could mess up the system like calling malloc() or free(). -*/ -static int patestCallback( const void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo* timeInfo, - PaStreamCallbackFlags statusFlags, - void *userData ) -{ - paTestData *data = (paTestData*)userData; - float *out = (float*)outputBuffer; - unsigned long i,j; - - (void) timeInfo; /* Prevent unused variable warnings. */ - (void) statusFlags; - (void) inputBuffer; - - for( i=0; i<framesPerBuffer; i++ ) - { - float x = data->sine[(int)data->phase]; - data->phase += data->phaseIncrement; - if( data->phase >= TABLE_SIZE ){ - data->phase -= TABLE_SIZE; - } - - x *= data->amp; - if( data->fadeIn ){ - data->amp += .001; - if( data->amp >= 1. ) - data->fadeIn = 0; - }else if( data->fadeOut ){ - if( data->amp > 0 ) - data->amp -= .001; - } - - for( j = 0; j < CHANNEL_COUNT; ++j ){ - *out++ = x; - } - } - - if( data->amp > 0 ) - return paContinue; - else - return paComplete; -} - - -#define YES 1 -#define NO 0 - - -static int playUntilKeyPress( int deviceIndex, float sampleRate, - int framesPerUserBuffer, int framesPerDSoundBuffer ) -{ - PaStreamParameters outputParameters; - PaWinDirectSoundStreamInfo directSoundStreamInfo; - PaStream *stream; - PaError err; - int c; - - outputParameters.device = deviceIndex; - outputParameters.channelCount = CHANNEL_COUNT; - outputParameters.sampleFormat = paFloat32; /* 32 bit floating point processing */ - outputParameters.suggestedLatency = 0; /*Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;*/ - outputParameters.hostApiSpecificStreamInfo = NULL; - - directSoundStreamInfo.size = sizeof(PaWinDirectSoundStreamInfo); - directSoundStreamInfo.hostApiType = paDirectSound; - directSoundStreamInfo.version = 2; - directSoundStreamInfo.flags = paWinDirectSoundUseLowLevelLatencyParameters; - directSoundStreamInfo.framesPerBuffer = framesPerDSoundBuffer; - outputParameters.hostApiSpecificStreamInfo = &directSoundStreamInfo; - - err = Pa_OpenStream( - &stream, - NULL, /* no input */ - &outputParameters, - sampleRate, - framesPerUserBuffer, - paClipOff | paPrimeOutputBuffersUsingStreamCallback, /* we won't output out of range samples so don't bother clipping them */ - patestCallback, - &data ); - if( err != paNoError ) goto error; - - data.amp = 0; - data.fadeIn = 1; - data.fadeOut = 0; - data.phase = 0; - data.phaseIncrement = 15 + ((rand()%100) / 10); // randomise pitch - - err = Pa_StartStream( stream ); - if( err != paNoError ) goto error; - - - do{ - printf( "Trying buffer size %d.\nIf it sounds smooth (without clicks or glitches) press 'y', if it sounds bad press 'n' ('q' to quit)\n", framesPerDSoundBuffer ); - c = tolower(_getch()); - if( c == 'q' ){ - Pa_Terminate(); - exit(0); - } - }while( c != 'y' && c != 'n' ); - - data.fadeOut = 1; - while( Pa_IsStreamActive(stream) == 1 ) - Pa_Sleep( 100 ); - - err = Pa_StopStream( stream ); - if( err != paNoError ) goto error; - - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto error; - - return (c == 'y') ? YES : NO; - -error: - return err; -} - -/*******************************************************************/ -static void usage( int dsoundHostApiIndex ) -{ - int i; - - fprintf( stderr, "PortAudio DirectSound output latency user guided test\n" ); - fprintf( stderr, "Usage: x.exe dsound-device-index [sampleRate]\n" ); - fprintf( stderr, "Invalid device index. Use one of these:\n" ); - for( i=0; i < Pa_GetDeviceCount(); ++i ){ - - if( Pa_GetDeviceInfo(i)->hostApi == dsoundHostApiIndex && Pa_GetDeviceInfo(i)->maxOutputChannels > 0 ) - fprintf( stderr, "%d (%s)\n", i, Pa_GetDeviceInfo(i)->name ); - } - Pa_Terminate(); - exit(-1); -} - -/* - ideas: - o- could be testing with 80% CPU load - o- could test with different channel counts -*/ - -int main(int argc, char* argv[]) -{ - PaError err; - int i; - int deviceIndex; - int dsoundBufferSize, smallestWorkingBufferSize; - int smallestWorkingBufferingLatencyFrames; - int min, max, mid; - int testResult; - FILE *resultsFp; - int dsoundHostApiIndex; - const PaHostApiInfo *dsoundHostApiInfo; - double sampleRate = DEFAULT_SAMPLE_RATE; - - err = Pa_Initialize(); - if( err != paNoError ) goto error; - - dsoundHostApiIndex = Pa_HostApiTypeIdToHostApiIndex( paDirectSound ); - dsoundHostApiInfo = Pa_GetHostApiInfo( dsoundHostApiIndex ); - - if( argc > 3 ) - usage(dsoundHostApiIndex); - - deviceIndex = dsoundHostApiInfo->defaultOutputDevice; - if( argc >= 2 ){ - deviceIndex = -1; - if( sscanf( argv[1], "%d", &deviceIndex ) != 1 ) - usage(dsoundHostApiInfo); - if( deviceIndex < 0 || deviceIndex >= Pa_GetDeviceCount() || Pa_GetDeviceInfo(deviceIndex)->hostApi != dsoundHostApiIndex ){ - usage(dsoundHostApiInfo); - } - } - - printf( "Using device id %d (%s)\n", deviceIndex, Pa_GetDeviceInfo(deviceIndex)->name ); - - if( argc >= 3 ){ - if( sscanf( argv[2], "%lf", &sampleRate ) != 1 ) - usage(dsoundHostApiIndex); - } - - printf( "Testing with sample rate %f.\n", (float)sampleRate ); - - - - /* initialise sinusoidal wavetable */ - for( i=0; i<TABLE_SIZE; i++ ) - { - data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); - } - - data.phase = 0; - - resultsFp = fopen( "results.txt", "at" ); - fprintf( resultsFp, "*** DirectSound smallest working output buffer sizes\n" ); - - printTimeAndDate( resultsFp ); - printWindowsVersionInfo( resultsFp ); - - fprintf( resultsFp, "audio device: %s\n", Pa_GetDeviceInfo( deviceIndex )->name ); - fflush( resultsFp ); - - fprintf( resultsFp, "Sample rate: %f\n", (float)sampleRate ); - fprintf( resultsFp, "Smallest working buffer size (frames), Smallest working buffering latency (frames), Smallest working buffering latency (Seconds)\n" ); - - - /* - Binary search after Niklaus Wirth - from http://en.wikipedia.org/wiki/Binary_search_algorithm#The_algorithm - */ - min = 1; - max = (int)(sampleRate * .3); /* we assume that this size works 300ms */ - smallestWorkingBufferSize = 0; - - do{ - mid = min + ((max - min) / 2); - - dsoundBufferSize = mid; - testResult = playUntilKeyPress( deviceIndex, sampleRate, 0, dsoundBufferSize ); - - if( testResult == YES ){ - max = mid - 1; - smallestWorkingBufferSize = dsoundBufferSize; - }else{ - min = mid + 1; - } - - }while( (min <= max) && (testResult == YES || testResult == NO) ); - - smallestWorkingBufferingLatencyFrames = smallestWorkingBufferSize; /* not strictly true, but we're using an unspecified callback size, so kind of */ - - printf( "Smallest working buffer size is: %d\n", smallestWorkingBufferSize ); - printf( "Corresponding to buffering latency of %d frames, or %f seconds.\n", smallestWorkingBufferingLatencyFrames, smallestWorkingBufferingLatencyFrames / sampleRate ); - - fprintf( resultsFp, "%d, %d, %f\n", smallestWorkingBufferSize, smallestWorkingBufferingLatencyFrames, smallestWorkingBufferingLatencyFrames / sampleRate ); - fflush( resultsFp ); - - - /* power of 2 test. iterate to the smallest power of two that works */ - - smallestWorkingBufferSize = 0; - dsoundBufferSize = 64; - - do{ - testResult = playUntilKeyPress( deviceIndex, sampleRate, 0, dsoundBufferSize ); - - if( testResult == YES ){ - smallestWorkingBufferSize = dsoundBufferSize; - }else{ - dsoundBufferSize *= 2; - } - - }while( (dsoundBufferSize <= (int)(sampleRate * .3)) && testResult == NO ); - - smallestWorkingBufferingLatencyFrames = smallestWorkingBufferSize; /* not strictly true, but we're using an unspecified callback size, so kind of */ - - fprintf( resultsFp, "%d, %d, %f\n", smallestWorkingBufferSize, smallestWorkingBufferingLatencyFrames, smallestWorkingBufferingLatencyFrames / sampleRate ); - fflush( resultsFp ); - - - fprintf( resultsFp, "###\n" ); - fclose( resultsFp ); - - Pa_Terminate(); - printf("Test finished.\n"); - - return err; -error: - Pa_Terminate(); - fprintf( stderr, "An error occurred while using the PortAudio stream\n" ); - fprintf( stderr, "Error number: %d\n", err ); - fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); - return err; -} |