[MPlayer-dev-eng] [PATCH] AC3/DTS passthrough for Mac OS X

Nicolas Plourde nicolas.plourde at gmail.com
Thu Oct 11 04:03:17 CEST 2007


On 16-Sep-07, at 8:12 AM, Ulion wrote:

> 2007/9/16, Reimar Döffinger <Reimar.Doeffinger at stud.uni-karlsruhe.de>:
>
> Let me explain.
> When we use digital output, passthrough to s/pdif, all data transfered
> by the audio chain is encoded data, its volume can not be adjusted by
> any way, unless decode the data and adjust volume then re-encoded the
> data, that's not worth. So when we doing passthrough, audio volume
> will not allow to be changed.
> When the control request to set a volume, if return false, we got this
> log and mplayer dead:
>
> [Mixer] No hardware mixing, inserting volume filter.
> [libaf] Adding filter volume
> [libaf] Adding filter format
> [format] Sample format big-endian AC3 not yet supported
>
> Only return true made the expected result.
>
>
> When the control request to get a volume, I tried return false for get
> volume, it works and mixer return a dummy volume to the caller, it's
> an acceptable behavior, fixed.
>
> fixed patch is here.
>

applied

====
Nicolas Plourde <nicolas.plourde at gmail.com>





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