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[nadia]

Hello 
I'm trying to implement a basic playback driven by a jogwheel and eventually by the mouse wheel; in order to play till a given position I'm using BASS_ChannelSetSync with "BASS_SYNC_POS | BASS_SYNC_ONETIME" flags and it works great when playing forward; it seems that the sync is not generated when playing a reversed stream created with bass_fx; am I missing something or is this feature not implemented for reversed streams? If this should be the case, is there any suggestion for achieving something similar?

Thanks and kind regards 

nadia

[Ian @ un4seen]

BASS_SYNC_POS syncs should also work in reverse. If you aren't already using it, please try this latest build, which includes some sync tweaks:

    www.un4seen.com/stuff/bass_fx.zip

If your sync still isn't working, how far in advance are you setting it? Note that data is decoded for reversal in blocks determined by the BASS_FX_ReverseCreate "dec_block" parameter, and a sync won't be triggered if its position has already been decoded (until the position is reached again).

[nadia]

Hello, 

unfortunately it doesn't seem to work as I would expect.
I'm currently creating the reverse stream in this way

Code SelectExpand

DWORD dwFlags = BASS_STREAM_DECODE;
hStream = BASS_FX_ReverseCreate (hOriginalStream, 2, BASS_FX_FREESOURCE | dwFlags);

and setting the sync in the way below in order to be notified when 6 seconds are played in reverse where these 6 seconds are represented by qwOffsetBytes which are subtracted to the current position:

Code SelectExpand

QWORD qwNewPosBytes = qwCurrPosBytes - qwOffsetBytes;
BASS_ChannelSetSync (hStream, BASS_SYNC_POS | BASS_SYNC_ONETIME, qwNewPosBytes, &EndFunc, NULL);

But, although the stream plays in reverse, the sync is never triggered.

May be some parameter is wrong or may be I'm not doing things correctly?

Thanks and Kind regards

nadia

[Ian @ un4seen]

That seems to be working here. Are you sure your "qwCurrPosBytes" value is correct? This is what I tried successfully:

Code SelectExpand

QWORD qwCurrPosBytes = BASS_ChannelGetPosition(hStream, 0);
QWORD qwOffsetBytes = BASS_ChannelSeconds2Bytes(hStream, 6);
QWORD    qwNewPosBytes = qwCurrPosBytes - qwOffsetBytes;
BASS_ChannelSetSync (hStream, BASS_SYNC_POS | BASS_SYNC_ONETIME, qwNewPosBytes, &EndFunc, NULL);


[nadia]

Ops,
indeed the error was inside the new position, sorry for the trouble, it works just fine.

Thanks and kind regards 

nadia

[Ian @ un4seen]

OK. Good to hear you found the problem, and it wasn't BASS or BASS_FX