BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  vista and wavoutopen          BorlandTalk.com Forum Index -> Delphi Multimedia View previous topic :: View next topic   Author Message York Guest Posted: Tue Mar 13, 2007 10:55 pm    Post subject: vista and wavoutopen Hello, In my application (Works fine on XP) I have two threads. Each theard calls WaveOutOpen function and after that processess some audio buffers using WaveOutWrite. Running this on Vista I get the following. The first thread calls WaveOutOpen and starts to "write" the audio buffers. So far so good. As soon as the second thread calls WaveOutOpen the first thread stops and the second thread "writes" the headers ok. The error message I get from the WaveOutWrite in the first thread (after the second starts) is with MMResult = 6 which is "No driver" Could you help me resolve this in vista. Thank you so much. Back to top Jens Gruschel Guest Posted: Wed Mar 14, 2007 4:10 am    Post subject: Re: vista and wavoutopen Quote: In my application (Works fine on XP) I have two threads. Each theard calls WaveOutOpen function and after that processess some audio buffers using WaveOutWrite. Although I don't know what specific problem this is, I know that on Vista sound processing is quite different (more work is done by the OS, less by the audio driver). Using older audio hardware your approach might cause problems, too, because the number of waves that can be played at the same time is limited (very old soundcards could only play one wave at the same time). You can avoid this problem by mixing the waves yourself (at the cost of some more CPU cycles). Why don't you have one WaveOutOpen (let's say in the main thread), which prepares the buffers and asks the threads to populate them? Each thread would simply add its wave to the buffer (and doing some clipping to avoid overflow). Another option might be using DirectSound, which does the mixing for you (either using the audio hardware or the CPU). But as I said I don't know exactly either, so I'm looking forward to see a real explanation here. -- Jens Gruschel http://www.pegtop.net Back to top York Guest Posted: Wed Mar 14, 2007 5:44 pm    Post subject: Re: vista and wavoutopen Reserching this in details I noticed the following: Each time I run Skype for example while my app is running the audio in my application fails. Same happens with Skype - each time I run my application when skype is running the audio in skype fails. Tested this with other pairs - same thing. It seems that the "famous WASAPI" vista layer has some problems or is still not documented quite well. "Jens Gruschel" <nospam (AT) thisurldoesnotexist (DOT) com> wrote in message news:45f72f6f$1 (AT) newsgroups (DOT) borland.com... Quote: In my application (Works fine on XP) I have two threads. Each theard calls WaveOutOpen function and after that processess some audio buffers using WaveOutWrite. Although I don't know what specific problem this is, I know that on Vista sound processing is quite different (more work is done by the OS, less by the audio driver). Using older audio hardware your approach might cause problems, too, because the number of waves that can be played at the same time is limited (very old soundcards could only play one wave at the same time). You can avoid this problem by mixing the waves yourself (at the cost of some more CPU cycles). Why don't you have one WaveOutOpen (let's say in the main thread), which prepares the buffers and asks the threads to populate them? Each thread would simply add its wave to the buffer (and doing some clipping to avoid overflow). Another option might be using DirectSound, which does the mixing for you (either using the audio hardware or the CPU). But as I said I don't know exactly either, so I'm looking forward to see a real explanation here. -- Jens Gruschel http://www.pegtop.net Back to top Jens Gruschel Guest Posted: Wed Mar 14, 2007 11:05 pm    Post subject: Re: vista and wavoutopen Quote: Reserching this in details I noticed the following: Each time I run Skype for example while my app is running the audio in my application fails. Same happens with Skype - each time I run my application when skype is running the audio in skype fails. Tested this with other pairs - same thing. It seems that the "famous WASAPI" vista layer has some problems or is still not documented quite well. Exactly what was happening before soundcards could manage more than one wave at the same time. I guess your soundcard actually isn't the problem, but Vista or the driver is. Have you tried to update the driver? -- Jens Gruschel http://www.pegtop.net Back to top York Guest Posted: Thu Mar 15, 2007 8:12 am    Post subject: Re: vista and wavoutopen To be hones, actually I did not try to do update the driver. My sound card is a pretty new one and as far as I see it is recognized by Vista correctly but today I'll try to use the driver provided by the vendor. I'll update you with the results. Regards "Jens Gruschel" <nospam (AT) thisurldoesnotexist (DOT) com> wrote in message news:45f8398c$1 (AT) newsgroups (DOT) borland.com... Quote: Reserching this in details I noticed the following: Each time I run Skype for example while my app is running the audio in my application fails. Same happens with Skype - each time I run my application when skype is running the audio in skype fails. Tested this with other pairs - same thing. It seems that the "famous WASAPI" vista layer has some problems or is still not documented quite well. Exactly what was happening before soundcards could manage more than one wave at the same time. I guess your soundcard actually isn't the problem, but Vista or the driver is. Have you tried to update the driver? -- Jens Gruschel http://www.pegtop.net Back to top York Guest Posted: Tue Mar 20, 2007 3:12 pm    Post subject: Re: vista and wavoutopen Solverd !!! must do this: WaveOutOpen(@hWaveHandve, UINT($FFFFFF).....) i.e. use the system default device without the WAVE_MAPPER flag. The above works both on Vista and XP "Jens Gruschel" <nospam (AT) thisurldoesnotexist (DOT) com> wrote in message news:45f8398c$1 (AT) newsgroups (DOT) borland.com... Quote: Reserching this in details I noticed the following: Each time I run Skype for example while my app is running the audio in my application fails. Same happens with Skype - each time I run my application when skype is running the audio in skype fails. Tested this with other pairs - same thing. It seems that the "famous WASAPI" vista layer has some problems or is still not documented quite well. Exactly what was happening before soundcards could manage more than one wave at the same time. I guess your soundcard actually isn't the problem, but Vista or the driver is. Have you tried to update the driver? -- Jens Gruschel http://www.pegtop.net Back to top Jens Gruschel Guest Posted: Tue Mar 20, 2007 11:29 pm    Post subject: Re: vista and wavoutopen Quote: WaveOutOpen(@hWaveHandve, UINT($FFFFFF).....) i.e. use the system default device without the WAVE_MAPPER flag. The above works both on Vista and XP What did you use before? Maybe using waveOutGetNumDevs and waveOutGetDevCaps isn't a bad idea. Maybe your Vista system has the same default device as your XP system had, but devices are ordered differently. -- Jens Gruschel http://www.pegtop.net Back to top York Guest Posted: Wed Mar 21, 2007 8:12 am    Post subject: Re: vista and wavoutopen For XP - works with DeviceID = 0 (or any other valid ID) Params := CALLBACK_FUNCTION or WAVE_MAPPED; Res := WaveOutOpen(@FWaveOutHandle, DeviceID, FFormat, DWORD(@waveOutPrc), FWindowHandle, params); For Vista (though I have a deviceID = 0) Params := CALLBACK_FUNCTION; Res := WaveOutOpen(@FWaveOutHandle, UINT($FFFFFFFF), FFormat, DWORD(@waveOutPrc), FWindowHandle, params); and it works. (i.e. WAVE_MAPPED flag removed from params) So though I have a deviceID = 0 if I pass this to the example above it fails. Note that it does not fail when I try to open the device but after I try to use WaveOutWrite. The examples above work just fine if only a single call is made but in my application I need to "waveout" several simultaneous independent audio streams which cannot be mixed. "Jens Gruschel" <nospam (AT) thisurldoesnotexist (DOT) com> wrote in message news:46002830$1 (AT) newsgroups (DOT) borland.com... Quote: WaveOutOpen(@hWaveHandve, UINT($FFFFFF).....) i.e. use the system default device without the WAVE_MAPPER flag. The above works both on Vista and XP What did you use before? Maybe using waveOutGetNumDevs and waveOutGetDevCaps isn't a bad idea. Maybe your Vista system has the same default device as your XP system had, but devices are ordered differently. -- Jens Gruschel http://www.pegtop.net Back to top Jens Gruschel Guest Posted: Fri Mar 23, 2007 4:32 am    Post subject: Re: vista and wavoutopen Quote: and it works. (i.e. WAVE_MAPPED flag removed from params) So though I have a deviceID = 0 if I pass this to the example above it fails. Interesting. Thanks for that information. -- Jens Gruschel http://www.pegtop.net Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Multimedia All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.