Hi Ani, Did you find answers to your questions? I am facing the exact same problem with Eclair on Zoom2. Ringer volume does change but it does not write anything to codec registers.
thanks, randd On Dec 4 2009, 8:40 am, ani <anish198519851...@gmail.com> wrote: > Please reply to my last question in this thread~ > > On Nov 5, 11:06 am, ani <anish198519851...@gmail.com> wrote: > > > Hack, > > > I just want one information.When i am playing music+ringtone in that > > case there will be a buffer for both the sounds. > > > questions are: > > a.These mixing of buffers takes place in audiomixer.cpp? > > b.If i increase of decrease thevolumeof music,am i increasing or > > decreasing the gain of codec or is it taken care by audiomixer while > > mixing the buffers? > > > Thanks in advance. > > > On Sep 16, 10:15 am, Dianne Hackborn <hack...@android.com> wrote: > > > > Like I said, I can't help you at this level of detail. I wouldn't be > > > surprised if everything is going through the global mixer though. > > > > 2009/9/15 Andy <teddy...@gmail.com> > > > > > Hi Dianne Hackborn, > > > > > Then may I know if every audio stream that you mentioned in different > > > > modes (e.g. ringervolume, mediavolume, etc.) is always going through > > > > a mixer for audio processing? For such a mixer, does it mean the > > > > source file AudioMixer.cpp? I would be appreciated for your further > > > > comments. > > > > > On 9月16日, 上午10時24分, Dianne Hackborn <hack...@android.com> wrote: > > > > > Sorry I can't help you with codecs, maybe somebody else can. > > > > > > 2009/9/15 Andy <teddy...@gmail.com> > > > > > > > Dianne Hackborn, thanks for your comments. > > > > > > > Right, I know this about the ringer and media volumes. But what I > > > > > > concern here is how to set thevolumelevel gain in the real hardware > > > > > > codec driver (instead of the "software"volumechange if it is) when > > > > > > thevolumelevel is changed in the Android. Here is more observations > > > > > > that I missed to mention in the case: > > > > > > > 1. When playback a song and make changed thevolumelevel in the > > > > > > Android, I observe the mediavolumeis using. For what I observed, the > > > > > > "software"volumeis somehow using as I mentioned before. > > > > > > > 2. When not in music playback, I observe the ringervolumeis using. > > > > > > If I make changed thevolumelevel in this case, I found the > > > > > > corresponding hardware codec driver is called to set thevolumegain > > > > > > (i.e. I can see the corresponding codec registers changed by > > > > > > alsa_amixer). However, what I found the LOGCAT is strange. The codec > > > > > > driver is merely called to set zerovolumelevel first (i.e. 0 value) > > > > > > and then set back to its maximum value (i.e. 255 value out of the > > > > > > maximum 255 level). > > > > > > > As I need to ensure that the direct hardware codec driver is called > > > > > > for audio quality concern, I need to be clear of what happens here > > > > > > or > > > > > > what is going wrong with some settings in my case. > > > > > > > What can I do? Thanks! > > > > > > > On 9月16日, 上午4時07分, Dianne Hackborn <hack...@android.com> wrote: > > > > > > > You aren't adjusting the overallvolumelevel, you are adjusting the > > > > > > volumes > > > > > > > of one of the streams being mixed. Typically by default you are > > > > > > adjusting > > > > > > > the ringervolume, and if playing media you will be adjusting the > > > > media > > > > > > >volume. > > > > > > > > On Tue, Sep 15, 2009 at 3:10 AM, Andy <teddy...@gmail.com> wrote: > > > > > > > > > Hi all, > > > > > > > > > I found in my Android platform that everytime when I adjust the > > > >volume > > > > > > > > level (i.e. press thevolumekey +/-), it seems asoftwarevolume > > > > > > > >controlscheme is used (Instead, I expect a direct function call > > > > > > > >to > > > > a > > > > > > > > codec hardware driver, and changing audio gain in corresponding > > > > > > > > registers). > > > > > > > > > I found this using the alsa_amixer to list out thevolumechange > > > > > > > > in > > > > a > > > > > > > > "MasterVolume" element. Here is what I figure out this following > > > > the > > > > > > > > sequence below: > > > > > > > > > 1. After bootup, monitor the currentvolumelevel of the "Master > > > > > > > >Volume" element using the alsa_amixer. The GET value is 255 out > > > > > > > >of > > > > the > > > > > > > > maximum 255. > > > > > > > > > 2. Playback a song using the Android music player. > > > > > > > > > 3. Adjust thevolumelevel in the Android to see if there is > > > > changed > > > > > > > > in the "MasterVolume" status. > > > > > > > > > 4. I found I can hear the change in the headphone audio output, > > > > > > > > but > > > > > > > > the "MasterVolume" element still keeps the value 255 no matter I > > > > > > > > changed thevolumefrom the lowest to the highest. > > > > > > > > > I would like to disable thissoftwarevolumeif it is really using > > > > and > > > > > > > > use the hardware. Does anyone have any idea about what is going > > > > > > > > on > > > > in > > > > > > > > my case? Thanks!!! > > > > > > > > -- > > > > > > > Dianne Hackborn > > > > > > > Android framework engineer > > > > > > > hack...@android.com > > > > > > > > Note: please don't send private questions to me, as I don't have > > > > > > > time > > > > to > > > > > > > provide private support, and so won't reply to such e-mails. All > > > > such > > > > > > > questions should be posted on public forums, where I and others > > > > > > > can > > > > see > > > > > > and > > > > > > > answer them.- 隱藏被引用文字 - > > > > > > > > - 顯示被引用文字 - > > > > > > -- > > > > > Dianne Hackborn > > > > > Android framework engineer > > > > > hack...@android.com > > > > > > Note: please don't send private questions to me, as I don't have time > > > > > to > > > > > provide private support, and so won't reply to such e-mails. All such > > > > > questions should be posted on public forums, where I and others can > > > > > see > > > > and > > > > > answer them.- 隱藏被引用文字 - > > > > > > - 顯示被引用文字 - > > > > -- > > > Dianne Hackborn > > > Android framework engineer > > > hack...@android.com > > > > Note: please don't send private questions to me, as I don't have time to > > > provide private support, and so won't reply to such e-mails. All such > > > questions should be posted on public forums, where I and others can see > > > and > > > answer them.- Hide quoted text - > > > > - Show quoted text - -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting