[wdmaudiodev] Avstream capture - Sync issue with Cool Edit Pro 2.0
- From: wade <wdawson61@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Fri, 15 Aug 2003 12:32:43 -0700 (PDT)
Hi All:
I have a capture-only AvStreams driver and having a problem with sync on Cool
Edit Pro. I capture a stream in sound forge and it plays back properly in Sound
Forge Playback and capture both work fine on Sound Forge but CEP 2.0 playback
tempo varies and is glitchy. I am filling the duration and time members of the
KSStream Header as follows:
#define BITS_PER_BYTE 8
#define NANOSECONDS 10000000
PWAVEFORMATPCMEX waveFormatPcmeEx = (PWAVEFORMATPCMEX)(pin->ConnectionFormat +
1);
ULONG channels = waveFormatPcmeEx->Format.nChannels;
ULONG hz = waveFormatPcmeEx->Format.nSamplesPerSec;
ULONG bps = (waveFormatPcmeEx->Format.wBitsPerSample)?
waveFormatPcmeEx->Format.wBitsPerSample :
waveFormatPcmeEx->Samples.wValidBitsPerSample;
StreamPointer -> StreamHeader ->OptionsFlags =
(KSSTREAM_HEADER_OPTIONSF_DURATIONVALID | KSSTREAM_HEADER_OPTIONSF_TIMEVALID);
StreamPointer -> StreamHeader->PresentationTime.Numerator = BITS_PER_BYTE *
NANOSECONDS;
StreamPointer -> StreamHeader->PresentationTime.Denominator = bps * channels
* hz;
StreamPointer -> StreamHeader->PresentationTime.Time = Pin->streamOffset;
StreamPointer -> StreamHeader->Duration = StreamPointer -> StreamHeader ->
DataUsed;
Any help appreciated.
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