Re: 96kHz 24bit WAV playback

John Stirling wrote:
> Any chance we could get a comment from one of your experts on .wav 
> playback (Jon/Ken I presume) before we start digging into this any more ?
> 

John,

I don't have time to dig too deep, but I downloaded the file

    Test_File_2_0_STEREO_PCM.wav

from http://www.itrax.com/Pages/HelpFAQs.php#1 (PCM 96/24 2.0 stereo)


It won't play back in splay because of a failure in:

	HX_RESULT CPCMAudioFormat::Init(IHXValues* pHeader)


It does:

       retVal = pHeader->GetPropertyCString("MimeType", pMimeTypeStr);

then:

            else if (!strcmp(pszMimeType, "audio/x-pn-wav"))
             {
                 m_ucMimeType = kMimeTypeAudioXPNWav;
             }

Finally:

                 // Get the opaque data
                 IHXBuffer* pBuffer = NULL;
                 retVal = pHeader->GetPropertyBuffer("OpaqueData", pBuffer);
                 if (SUCCEEDED(retVal))


There appears to be no OpaqueData, it returns HXR_FAIL, and ends
up returning that error back up the chain. It does that for 2
renderers.

Not sure if that is much of a clue or not.

--greg.



> 
> Eric Hyche wrote:
>> Hard to tell when using PC RealPlayer as comparison. It
>> uses DirectX to play back .wav files, and not Helix,
>> the Windows RealPlayer might be able to play it back
>> but Helix still might not.
>>
>> If the changes suggested below by Greg didn't work,
>> then further investigation is needed to find out
>> why.
>>
>> Eric
>>
>> =======================================
>> Eric Hyche ([email protected])
>> Principal Engineer
>> RealNetworks, Inc.
>>
>>
>>   
>>> -----Original Message-----
>>> From: [email protected] [mailto:[email protected]]
>>> On Behalf Of John Stirling
>>> Sent: Tuesday, December 23, 2008 4:14 AM
>>> To: [email protected]
>>> Subject: Re: [Helix-client-dev] 96kHz 24bit WAV playback
>>>
>>> I heard a rumour that the PC real player now supports 24/96 playback ?
>>>
>>> If so, is it possible to port those changes to cayenne ?
>>>
>>> John
>>>
>>>
>>> John Stirling wrote:
>>>     
>>>> I added 96000 into that list but still can't play the file.
>>>>
>>>> Is there anything else easy to try ?
>>>>
>>>> John
>>>>
>>>>
>>>> John Stirling wrote:
>>>>       
>>>>> Thanks (I remember that list)
>>>>>
>>>>> re 24 bit -
>>>>>
>>>>> . if the audio device only supports 16 bit would you expect the
>>>>> core/resampler to handle that ?
>>>>> . if the audio device supports 24 bit would the core be able to
>>>>> output in 24 bit ?
>>>>>
>>>>> John
>>>>>
>>>>>
>>>>> Greg Wright wrote:
>>>>>         
>>>>>> From hxaudses.cpp:
>>>>>>
>>>>>> const unsigned short z_anValidSampleRates[] = { 8000,
>>>>>>                                                 11025,
>>>>>>                                                 16000,
>>>>>>                                                 22050,
>>>>>>                                                 32000,
>>>>>>                                                 44100,
>>>>>>                                                 48000,
>>>>>>                                                 49512
>>>>>>                                               };
>>>>>>
>>>>>> You might need to expand that list at least.
>>>>>>
>>>>>>
>>>>>> --greg.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> John Stirling wrote:
>>>>>>           
>>>>>>> I tried a sample track on RealPlayer10 on windows and it didn't work.
>>>>>>>
>>>>>>> The same track could play ok via itunes, but not via WMP10.
>>>>>>>
>>>>>>> See:
>>>>>>> http://www.itrax.com/Pages/HelpFAQs.php#1
>>>>>>> for track we're trying to play
>>>>>>>
>>>>>>> John
>>>>>>>
>>>>>>>
>>>>>>> Eric Hyche wrote:
>>>>>>>             
>>>>>>>> I was hoping someone else would answer, since
>>>>>>>> I'm not 100% certain of my answer... :-)
>>>>>>>>
>>>>>>>> If you are talking about playing back a raw
>>>>>>>> 96kHz 24-bit-per-sample .wav file, then I can't
>>>>>>>> think of a reason that *wouldn't* work, assuming
>>>>>>>> the audio device could be opened at 96kHz
>>>>>>>> and 24bits. If it couldn't be, then it would
>>>>>>>> have to go through a few other layers of the
>>>>>>>> system (resampler, etc.) which I *believe* suport
>>>>>>>> this format, but I'm not sure.
>>>>>>>>
>>>>>>>> Jon/Ken: do you know if this would work, or
>>>>>>>> have you ever tried 96kHz/24-bit playback?
>>>>>>>>
>>>>>>>> Eric
>>>>>>>>
>>>>>>>> =============================================
>>>>>>>> Eric Hyche ([email protected])
>>>>>>>> Technical Lead
>>>>>>>> RealNetworks, Inc.
>>>>>>>>               
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: [email protected]
>>>>>>>>> [mailto:[email protected]] On Behalf Of
>>>>>>>>> John Stirling
>>>>>>>>> Sent: Friday, January 18, 2008 5:04 AM
>>>>>>>>> To: [email protected]
>>>>>>>>> Subject: Re: [Helix-client-dev] 96kHz 24bit WAV playback
>>>>>>>>>
>>>>>>>>> Any response on this ?
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> John Stirling wrote:
>>>>>>>>>
>>>>>>>>>                 
>>>>>>>>>> Is 96khz, 24bit WAV supported on cayenne1_5_0 ?
>>>>>>>>>>
>>>>>>>>>> Seems a bit excessive, but someone is asking..
>>>>>>>>>>
>>>>>>>>>> John
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Helix-client-dev mailing list
>>>>>>>>>> [email protected]
>>>>>>>>>> http://lists.helixcommunity.org/mailman/listinfo/helix-client-dev
>>>>>>>>>>
>>>>>>>>>>                   
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>>>>>>>>>
>>>>>>>>>                 
>>>>>>>>               
>>>>>>> ------------------------------------------------------------------------
>>>>>>>
>>>>>>>
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