519 lines
19 KiB
C
519 lines
19 KiB
C
/*
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* $Id: $
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* Portable Audio I/O Library
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* Windows MME low level buffer user guided parameters search
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*
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* Copyright (c) 2010 Ross Bencina
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The text above constitutes the entire PortAudio license; however,
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* the PortAudio community also makes the following non-binding requests:
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version. It is also
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* requested that these non-binding requests be included along with the
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* license above.
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*/
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#include <stdio.h>
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#include <time.h>
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#include <math.h>
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#define _WIN32_WINNT 0x0501 /* for GetNativeSystemInfo */
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#include <windows.h> /* required when using pa_win_wmme.h */
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#include <mmsystem.h> /* required when using pa_win_wmme.h */
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#include <conio.h> /* for _getch */
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#include "portaudio.h"
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#include "pa_win_wmme.h"
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#define DEFAULT_SAMPLE_RATE (44100.)
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#ifndef M_PI
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#define M_PI (3.14159265)
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#endif
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#define TABLE_SIZE (2048)
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#define CHANNEL_COUNT (2)
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/* seach parameters. we test all buffer counts in this range */
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#define MIN_WMME_BUFFER_COUNT (2)
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#define MAX_WMME_BUFFER_COUNT (12)
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/*******************************************************************/
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/* functions to query and print Windows version information */
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typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
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LPFN_ISWOW64PROCESS fnIsWow64Process;
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static BOOL IsWow64()
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{
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BOOL bIsWow64 = FALSE;
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//IsWow64Process is not available on all supported versions of Windows.
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//Use GetModuleHandle to get a handle to the DLL that contains the function
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//and GetProcAddress to get a pointer to the function if available.
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fnIsWow64Process = (LPFN_ISWOW64PROCESS) GetProcAddress(
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GetModuleHandle(TEXT("kernel32")),"IsWow64Process" );
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if(NULL != fnIsWow64Process)
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{
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if (!fnIsWow64Process(GetCurrentProcess(),&bIsWow64))
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{
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//handle error
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}
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}
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return bIsWow64;
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}
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static void printWindowsVersionInfo( FILE *fp )
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{
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OSVERSIONINFOEX osVersionInfoEx;
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SYSTEM_INFO systemInfo;
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const char *osName = "Unknown";
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const char *osProductType = "";
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const char *processorArchitecture = "Unknown";
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memset( &osVersionInfoEx, 0, sizeof(OSVERSIONINFOEX) );
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osVersionInfoEx.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
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GetVersionEx( &osVersionInfoEx );
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if( osVersionInfoEx.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS ){
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switch( osVersionInfoEx.dwMinorVersion ){
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case 0: osName = "Windows 95"; break;
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case 10: osName = "Windows 98"; break; // could also be 98SE (I've seen code discriminate based
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// on osInfo.Version.Revision.ToString() == "2222A")
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case 90: osName = "Windows Me"; break;
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}
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}else if( osVersionInfoEx.dwPlatformId == VER_PLATFORM_WIN32_NT ){
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switch( osVersionInfoEx.dwMajorVersion ){
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case 3: osName = "Windows NT 3.51"; break;
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case 4: osName = "Windows NT 4.0"; break;
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case 5: switch( osVersionInfoEx.dwMinorVersion ){
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case 0: osName = "Windows 2000"; break;
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case 1: osName = "Windows XP"; break;
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case 2:
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if( osVersionInfoEx.wSuiteMask & 0x00008000 /*VER_SUITE_WH_SERVER*/ ){
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osName = "Windows Home Server";
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}else{
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if( osVersionInfoEx.wProductType == VER_NT_WORKSTATION ){
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osName = "Windows XP Professional x64 Edition (?)";
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}else{
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if( GetSystemMetrics(/*SM_SERVERR2*/89) == 0 )
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osName = "Windows Server 2003";
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else
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osName = "Windows Server 2003 R2";
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}
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}break;
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}break;
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case 6:switch( osVersionInfoEx.dwMinorVersion ){
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case 0:
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if( osVersionInfoEx.wProductType == VER_NT_WORKSTATION )
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osName = "Windows Vista";
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else
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osName = "Windows Server 2008";
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break;
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case 1:
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if( osVersionInfoEx.wProductType == VER_NT_WORKSTATION )
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osName = "Windows 7";
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else
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osName = "Windows Server 2008 R2";
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break;
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}break;
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}
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}
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if(osVersionInfoEx.dwMajorVersion == 4)
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{
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if(osVersionInfoEx.wProductType == VER_NT_WORKSTATION)
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osProductType = "Workstation";
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else if(osVersionInfoEx.wProductType == VER_NT_SERVER)
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osProductType = "Server";
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}
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else if(osVersionInfoEx.dwMajorVersion == 5)
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{
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if(osVersionInfoEx.wProductType == VER_NT_WORKSTATION)
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{
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if((osVersionInfoEx.wSuiteMask & VER_SUITE_PERSONAL) == VER_SUITE_PERSONAL)
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osProductType = "Home Edition"; // Windows XP Home Edition
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else
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osProductType = "Professional"; // Windows XP / Windows 2000 Professional
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}
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else if(osVersionInfoEx.wProductType == VER_NT_SERVER)
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{
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if(osVersionInfoEx.dwMinorVersion == 0)
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{
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if((osVersionInfoEx.wSuiteMask & VER_SUITE_DATACENTER) == VER_SUITE_DATACENTER)
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osProductType = "Datacenter Server"; // Windows 2000 Datacenter Server
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else if((osVersionInfoEx.wSuiteMask & VER_SUITE_ENTERPRISE) == VER_SUITE_ENTERPRISE)
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osProductType = "Advanced Server"; // Windows 2000 Advanced Server
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else
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osProductType = "Server"; // Windows 2000 Server
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}
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}
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else
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{
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if((osVersionInfoEx.wSuiteMask & VER_SUITE_DATACENTER) == VER_SUITE_DATACENTER)
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osProductType = "Datacenter Edition"; // Windows Server 2003 Datacenter Edition
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else if((osVersionInfoEx.wSuiteMask & VER_SUITE_ENTERPRISE) == VER_SUITE_ENTERPRISE)
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osProductType = "Enterprise Edition"; // Windows Server 2003 Enterprise Edition
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else if((osVersionInfoEx.wSuiteMask & VER_SUITE_BLADE) == VER_SUITE_BLADE)
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osProductType = "Web Edition"; // Windows Server 2003 Web Edition
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else
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osProductType = "Standard Edition"; // Windows Server 2003 Standard Edition
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}
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}
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memset( &systemInfo, 0, sizeof(SYSTEM_INFO) );
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GetNativeSystemInfo( &systemInfo );
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if( systemInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_INTEL )
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processorArchitecture = "x86";
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else if( systemInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 )
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processorArchitecture = "x64";
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else if( systemInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64 )
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processorArchitecture = "Itanium";
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fprintf( fp, "OS name and edition: %s %s\n", osName, osProductType );
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fprintf( fp, "OS version: %d.%d.%d %S\n",
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osVersionInfoEx.dwMajorVersion, osVersionInfoEx.dwMinorVersion,
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osVersionInfoEx.dwBuildNumber, osVersionInfoEx.szCSDVersion );
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fprintf( fp, "Processor architecture: %s\n", processorArchitecture );
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fprintf( fp, "WoW64 process: %s\n", IsWow64() ? "Yes" : "No" );
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}
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static void printTimeAndDate( FILE *fp )
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{
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struct tm *local;
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time_t t;
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t = time(NULL);
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local = localtime(&t);
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fprintf(fp, "Local time and date: %s", asctime(local));
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local = gmtime(&t);
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fprintf(fp, "UTC time and date: %s", asctime(local));
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}
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/*******************************************************************/
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typedef struct
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{
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float sine[TABLE_SIZE];
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double phase;
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double phaseIncrement;
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volatile int fadeIn;
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volatile int fadeOut;
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double amp;
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}
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paTestData;
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static paTestData data;
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/* This routine will be called by the PortAudio engine when audio is needed.
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** It may called at interrupt level on some machines so don't do anything
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** that could mess up the system like calling malloc() or free().
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*/
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static int patestCallback( const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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paTestData *data = (paTestData*)userData;
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float *out = (float*)outputBuffer;
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unsigned long i,j;
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(void) timeInfo; /* Prevent unused variable warnings. */
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(void) statusFlags;
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(void) inputBuffer;
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for( i=0; i<framesPerBuffer; i++ )
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{
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float x = data->sine[(int)data->phase];
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data->phase += data->phaseIncrement;
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if( data->phase >= TABLE_SIZE ){
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data->phase -= TABLE_SIZE;
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}
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x *= data->amp;
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if( data->fadeIn ){
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data->amp += .001;
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if( data->amp >= 1. )
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data->fadeIn = 0;
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}else if( data->fadeOut ){
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if( data->amp > 0 )
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data->amp -= .001;
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}
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for( j = 0; j < CHANNEL_COUNT; ++j ){
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*out++ = x;
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}
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}
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if( data->amp > 0 )
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return paContinue;
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else
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return paComplete;
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}
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#define YES 1
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#define NO 0
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static int playUntilKeyPress( int deviceIndex, float sampleRate,
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int framesPerUserBuffer, int framesPerWmmeBuffer, int wmmeBufferCount )
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{
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PaStreamParameters outputParameters;
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PaWinMmeStreamInfo wmmeStreamInfo;
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PaStream *stream;
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PaError err;
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int c;
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outputParameters.device = deviceIndex;
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outputParameters.channelCount = CHANNEL_COUNT;
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outputParameters.sampleFormat = paFloat32; /* 32 bit floating point processing */
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outputParameters.suggestedLatency = 0; /*Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;*/
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outputParameters.hostApiSpecificStreamInfo = NULL;
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wmmeStreamInfo.size = sizeof(PaWinMmeStreamInfo);
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wmmeStreamInfo.hostApiType = paMME;
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wmmeStreamInfo.version = 1;
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wmmeStreamInfo.flags = paWinMmeUseLowLevelLatencyParameters | paWinMmeDontThrottleOverloadedProcessingThread;
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wmmeStreamInfo.framesPerBuffer = framesPerWmmeBuffer;
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wmmeStreamInfo.bufferCount = wmmeBufferCount;
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outputParameters.hostApiSpecificStreamInfo = &wmmeStreamInfo;
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err = Pa_OpenStream(
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&stream,
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NULL, /* no input */
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&outputParameters,
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sampleRate,
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framesPerUserBuffer,
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paClipOff | paPrimeOutputBuffersUsingStreamCallback, /* we won't output out of range samples so don't bother clipping them */
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patestCallback,
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&data );
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if( err != paNoError ) goto error;
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data.amp = 0;
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data.fadeIn = 1;
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data.fadeOut = 0;
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data.phase = 0;
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data.phaseIncrement = 15 + ((rand()%100) / 10); // randomise pitch
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto error;
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do{
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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", framesPerWmmeBuffer );
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c = tolower(_getch());
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if( c == 'q' ){
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Pa_Terminate();
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exit(0);
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}
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}while( c != 'y' && c != 'n' );
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data.fadeOut = 1;
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while( Pa_IsStreamActive(stream) == 1 )
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Pa_Sleep( 100 );
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err = Pa_StopStream( stream );
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if( err != paNoError ) goto error;
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err = Pa_CloseStream( stream );
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if( err != paNoError ) goto error;
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return (c == 'y') ? YES : NO;
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error:
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return err;
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}
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/*******************************************************************/
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static void usage( int wmmeHostApiIndex )
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{
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int i;
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fprintf( stderr, "PortAudio WMME output latency user guided test\n" );
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fprintf( stderr, "Usage: x.exe mme-device-index [sampleRate [min-buffer-count max-buffer-count]]\n" );
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fprintf( stderr, "Invalid device index. Use one of these:\n" );
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for( i=0; i < Pa_GetDeviceCount(); ++i ){
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if( Pa_GetDeviceInfo(i)->hostApi == wmmeHostApiIndex && Pa_GetDeviceInfo(i)->maxOutputChannels > 0 )
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fprintf( stderr, "%d (%s)\n", i, Pa_GetDeviceInfo(i)->name );
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}
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Pa_Terminate();
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exit(-1);
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}
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/*
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ideas:
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o- could be testing with 80% CPU load
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o- could test with different channel counts
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*/
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int main(int argc, char* argv[])
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{
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PaError err;
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int i;
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int deviceIndex;
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int wmmeBufferCount, wmmeBufferSize, smallestWorkingBufferSize;
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int smallestWorkingBufferingLatencyFrames;
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int min, max, mid;
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int testResult;
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FILE *resultsFp;
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int wmmeHostApiIndex;
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const PaHostApiInfo *wmmeHostApiInfo;
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double sampleRate = DEFAULT_SAMPLE_RATE;
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int wmmeMinBufferCount = MIN_WMME_BUFFER_COUNT;
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int wmmeMaxBufferCount = MAX_WMME_BUFFER_COUNT;
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err = Pa_Initialize();
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if( err != paNoError ) goto error;
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wmmeHostApiIndex = Pa_HostApiTypeIdToHostApiIndex( paMME );
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wmmeHostApiInfo = Pa_GetHostApiInfo( wmmeHostApiIndex );
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if( argc > 5 )
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usage(wmmeHostApiIndex);
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deviceIndex = wmmeHostApiInfo->defaultOutputDevice;
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if( argc >= 2 ){
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deviceIndex = -1;
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if( sscanf( argv[1], "%d", &deviceIndex ) != 1 )
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usage(wmmeHostApiIndex);
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if( deviceIndex < 0 || deviceIndex >= Pa_GetDeviceCount() || Pa_GetDeviceInfo(deviceIndex)->hostApi != wmmeHostApiIndex ){
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usage(wmmeHostApiIndex);
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}
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}
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printf( "Using device id %d (%s)\n", deviceIndex, Pa_GetDeviceInfo(deviceIndex)->name );
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if( argc >= 3 ){
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if( sscanf( argv[2], "%lf", &sampleRate ) != 1 )
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usage(wmmeHostApiIndex);
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}
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printf( "Testing with sample rate %f.\n", (float)sampleRate );
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if( argc == 4 ){
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if( sscanf( argv[3], "%d", &wmmeMinBufferCount ) != 1 )
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usage(wmmeHostApiIndex);
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wmmeMaxBufferCount = wmmeMinBufferCount;
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}
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if( argc == 5 ){
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if( sscanf( argv[3], "%d", &wmmeMinBufferCount ) != 1 )
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usage(wmmeHostApiIndex);
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if( sscanf( argv[4], "%d", &wmmeMaxBufferCount ) != 1 )
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usage(wmmeHostApiIndex);
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}
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printf( "Testing buffer counts from %d to %d\n", wmmeMinBufferCount, wmmeMaxBufferCount );
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/* initialise sinusoidal wavetable */
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for( i=0; i<TABLE_SIZE; i++ )
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{
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data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
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}
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data.phase = 0;
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resultsFp = fopen( "results.txt", "at" );
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fprintf( resultsFp, "*** WMME smallest working output buffer sizes\n" );
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printTimeAndDate( resultsFp );
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printWindowsVersionInfo( resultsFp );
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fprintf( resultsFp, "audio device: %s\n", Pa_GetDeviceInfo( deviceIndex )->name );
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fflush( resultsFp );
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fprintf( resultsFp, "Sample rate: %f\n", (float)sampleRate );
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fprintf( resultsFp, "Buffer count, Smallest working buffer size (frames), Smallest working buffering latency (frames), Smallest working buffering latency (Seconds)\n" );
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for( wmmeBufferCount = wmmeMinBufferCount; wmmeBufferCount <= wmmeMaxBufferCount; ++wmmeBufferCount ){
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printf( "Test %d of %d\n", (wmmeBufferCount - wmmeMinBufferCount) + 1, (wmmeMaxBufferCount-wmmeMinBufferCount) + 1 );
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printf( "Testing with %d buffers...\n", wmmeBufferCount );
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/*
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Binary search after Niklaus Wirth
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from http://en.wikipedia.org/wiki/Binary_search_algorithm#The_algorithm
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*/
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min = 1;
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max = (int)((sampleRate * .3) / (wmmeBufferCount-1)); //8192; /* we assume that this size works 300ms */
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smallestWorkingBufferSize = 0;
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do{
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mid = min + ((max - min) / 2);
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wmmeBufferSize = mid;
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testResult = playUntilKeyPress( deviceIndex, sampleRate, wmmeBufferSize, wmmeBufferSize, wmmeBufferCount );
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if( testResult == YES ){
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max = mid - 1;
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smallestWorkingBufferSize = wmmeBufferSize;
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}else{
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min = mid + 1;
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}
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}while( (min <= max) && (testResult == YES || testResult == NO) );
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smallestWorkingBufferingLatencyFrames = smallestWorkingBufferSize * (wmmeBufferCount - 1);
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printf( "Smallest working buffer size for %d buffers is: %d\n", wmmeBufferCount, smallestWorkingBufferSize );
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printf( "Corresponding to buffering latency of %d frames, or %f seconds.\n", smallestWorkingBufferingLatencyFrames, smallestWorkingBufferingLatencyFrames / sampleRate );
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fprintf( resultsFp, "%d, %d, %d, %f\n", wmmeBufferCount, 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 occured while using the portaudio stream\n" );
|
|
fprintf( stderr, "Error number: %d\n", err );
|
|
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
|
|
return err;
|
|
}
|
|
|