msvad question
in [Device Drivers]
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From: Tulup on 20 May 2005 02:36 Hi all! Newbie with this virtual adapter driver example. When connect capture pin to default renderer i hear only cracks. But one time i heard sound from my usb microphone using msvad (simple) filter. I have saved 2 graphedit projects (both contains only 2 filters - msvad connected to default audio renderer): 1. plays only cracks and clicks. 2. play my microphone sound. now i can't repeat the second graph. i insert the same msvad filter over and over again, render capture pin - and hear only cracks. The only visual differences with two graphs is the second don't have a MIDI Input Pin. 1. Why msvad play cracks? I think playing it i hear silence only ot similar... 2. How can it possible to hear microphone durning playing second graph? 3. Any ideas how to play some some audio stream (wav file for ex) througth msvad? -Andrey
From: Maione on 25 May 2005 09:22 Hi Audrey, to play some audio stream through MSVAD just use graphedit->render mediafile->choose an wave file and change the renderer in the graph: MSVAD directsound for example. regards, Giuseppe "Tulup" <AndreyShubin27(a)msn.com> a ýcrit dans le message de news:%23V5n$YQXFHA.580(a)TK2MSFTNGP15.phx.gbl... > Hi all! > Newbie with this virtual adapter driver example. > When connect capture pin to default renderer i hear only cracks. But one > time i heard sound from my usb microphone using msvad (simple) filter. > > I have saved 2 graphedit projects (both contains only 2 filters - msvad > connected to default audio renderer): > 1. plays only cracks and clicks. > 2. play my microphone sound. > > now i can't repeat the second graph. i insert the same msvad filter over and > over again, render capture pin - and hear only cracks. The only visual > differences with two graphs is the second don't have a MIDI Input Pin. > > 1. Why msvad play cracks? I think playing it i hear silence only ot > similar... > 2. How can it possible to hear microphone durning playing second graph? > 3. Any ideas how to play some some audio stream (wav file for ex) througth > msvad? > > -Andrey > >
From: Tulup on 26 May 2005 04:54 Hi Maione. Thank you for your reply. I think that you know this driver sample. Could you please answer few question about msvad? 1. You tell render wav file to DS msvad renderer. There is a problem, when i use msvad renderer (non ds) it works. But when i use DS msvad renderer - no CMiniportWaveCyclicStreamMSVAD is created and so no sound. 2. I'am trying to pass wav file to msvad renderer and simultaneously capture msvad sound from different graph. how to implement this behavior, audio data passed to renderer (path-through msvad) and in another capture graph (another instance of msvad stream) recieve this sound buffer ? i create global cyclic buffer of 1 second length (44100, 16, stereo), 2 markers (read,write). CopyTo method (render recieve 1764 bytes, i copy to my buffer and increase write position). CopyFrom method (capture filter use it) read from my buffer (BytesCount bytes). 3. Is it right method for this task. For what there is DMA buffer creates in msvad example (m_pvDmaBuffer). I can't use it because there is 2 instance of msvad needed to play 2 graph simultaneously. 4. When i play 2 graphs simultaneously, there is a problem. renderer in CopyTo method writes 1764 bytes, but capture CopyFrom rate(or something like that) is more that renderer produce. So no data availble for capture (read position = wite position). Clicks, cracks in sound. :(( How to solve this? "Maione" <giuseppe.maione(a)gmail.com> wrote in message news:%23LmV2ySYFHA.2520(a)TK2MSFTNGP09.phx.gbl... > Hi Audrey, > > to play some audio stream through MSVAD just use graphedit->render > mediafile->choose an wave file and change the renderer in the graph: MSVAD > directsound for example. > > regards, > Giuseppe > > "Tulup" <AndreyShubin27(a)msn.com> a ýcrit dans le message de > news:%23V5n$YQXFHA.580(a)TK2MSFTNGP15.phx.gbl... >> Hi all! >> Newbie with this virtual adapter driver example. >> When connect capture pin to default renderer i hear only cracks. But one >> time i heard sound from my usb microphone using msvad (simple) filter. >> >> I have saved 2 graphedit projects (both contains only 2 filters - msvad >> connected to default audio renderer): >> 1. plays only cracks and clicks. >> 2. play my microphone sound. >> >> now i can't repeat the second graph. i insert the same msvad filter over > and >> over again, render capture pin - and hear only cracks. The only visual >> differences with two graphs is the second don't have a MIDI Input Pin. >> >> 1. Why msvad play cracks? I think playing it i hear silence only ot >> similar... >> 2. How can it possible to hear microphone durning playing second graph? >> 3. Any ideas how to play some some audio stream (wav file for ex) >> througth >> msvad? >> >> -Andrey >> >> > >
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