Well, I'm not sure this is 100% true.
The API is obviously available in Android (E.g. see VOICE_CALL at 
http://developer.android.com/reference/android/media/MediaRecorder.AudioSource.html#VOICE_CALL).
 
Indeed, this doesn't mean that it works on some (let alone all) phones, but 
at least someone in the Android development team thought it could be done.
A lot can be learned about this issue by following the xda thread at 
http://forum.xda-developers.com/showthread.php?t=1441643.
This shows that if your phone is based on Qualcomm chip (e.g. Smapdragon) 
the application processor has access to the baseband audio (provided you 
have the appropriate driver).



On Monday, July 2, 2012 6:21:15 PM UTC+3, Kristopher Micinski wrote:
>
> If it does work on some device, that's really bad, and I'd wager that 
> you're probably just plain wrong... 
>
> The OS does *not* have access to the in call audio stream., this is 
> something that's handled by underlying hardware, it has *nothing* to 
> do with Linux, the only way you interface with the call is through the 
> RIL, which is simply a modem interface protocool. 
>
> People seem to be confused, and think that somehow because Android 
> typically runs on phones, that it actually facilitates the call, it 
> does *not*. 
>
> kris 
>
> On Mon, Jul 2, 2012 at 11:13 AM, Hitendrasinh Gohil 
> <hitendrasin...@gmail.com> wrote: 
> > yes mark that's true that it is not supported. 
> > 
> > But there are various apps that offers this functionality. 
> > 
> > I know that application processor doesn't have access to baseband 
> processor. 
> > 
> > so what i need to change at os/system level or any other  that makes 
> this 
> > possible? 
> > 
> > 
> > 
> > On Mon, Jul 2, 2012 at 8:31 PM, Mark Murphy <mmur...@commonsware.com> 
> wrote: 
> >> 
> >> On Mon, Jul 2, 2012 at 10:49 AM, Hitendrasinh Gohil 
> >> <hitendrasin...@gmail.com> wrote: 
> >> > hey mark murphy, 
> >> > 
> >> > can u pls guide me on this? 
> >> 
> >> As I have written, perhaps 100 times between here and StackOverflow, 
> >> call recording is not supported, except perhaps in speakerphone mode. 
> >> 
> >> -- 
> >> Mark Murphy (a Commons Guy) 
> >> http://commonsware.com | http://github.com/commonsguy 
> >> http://commonsware.com/blog | http://twitter.com/commonsguy 
> >> 
> >> _The Busy Coder's Guide to Android Development_ Version 3.7 Available! 
> >> 
> >> -- 
> >> You received this message because you are subscribed to the Google 
> >> Groups "Android Developers" group. 
> >> To post to this group, send email to 
> android-developers@googlegroups.com 
> >> To unsubscribe from this group, send email to 
> >> android-developers+unsubscr...@googlegroups.com 
> >> For more options, visit this group at 
> >> http://groups.google.com/group/android-developers?hl=en 
> > 
> > 
> > 
> > 
> > -- 
> > regards, 
> > Hitendrasinh Gohil 
> > 
> > -- 
> > You received this message because you are subscribed to the Google 
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>

On Monday, July 2, 2012 6:21:15 PM UTC+3, Kristopher Micinski wrote:
>
> If it does work on some device, that's really bad, and I'd wager that 
> you're probably just plain wrong... 
>
> The OS does *not* have access to the in call audio stream., this is 
> something that's handled by underlying hardware, it has *nothing* to 
> do with Linux, the only way you interface with the call is through the 
> RIL, which is simply a modem interface protocool. 
>
> People seem to be confused, and think that somehow because Android 
> typically runs on phones, that it actually facilitates the call, it 
> does *not*. 
>
> kris 
>
> On Mon, Jul 2, 2012 at 11:13 AM, Hitendrasinh Gohil 
> <hitendrasin...@gmail.com> wrote: 
> > yes mark that's true that it is not supported. 
> > 
> > But there are various apps that offers this functionality. 
> > 
> > I know that application processor doesn't have access to baseband 
> processor. 
> > 
> > so what i need to change at os/system level or any other  that makes 
> this 
> > possible? 
> > 
> > 
> > 
> > On Mon, Jul 2, 2012 at 8:31 PM, Mark Murphy <mmur...@commonsware.com> 
> wrote: 
> >> 
> >> On Mon, Jul 2, 2012 at 10:49 AM, Hitendrasinh Gohil 
> >> <hitendrasin...@gmail.com> wrote: 
> >> > hey mark murphy, 
> >> > 
> >> > can u pls guide me on this? 
> >> 
> >> As I have written, perhaps 100 times between here and StackOverflow, 
> >> call recording is not supported, except perhaps in speakerphone mode. 
> >> 
> >> -- 
> >> Mark Murphy (a Commons Guy) 
> >> http://commonsware.com | http://github.com/commonsguy 
> >> http://commonsware.com/blog | http://twitter.com/commonsguy 
> >> 
> >> _The Busy Coder's Guide to Android Development_ Version 3.7 Available! 
> >> 
> >> -- 
> >> You received this message because you are subscribed to the Google 
> >> Groups "Android Developers" group. 
> >> To post to this group, send email to 
> android-developers@googlegroups.com 
> >> To unsubscribe from this group, send email to 
> >> android-developers+unsubscr...@googlegroups.com 
> >> For more options, visit this group at 
> >> http://groups.google.com/group/android-developers?hl=en 
> > 
> > 
> > 
> > 
> > -- 
> > regards, 
> > Hitendrasinh Gohil 
> > 
> > -- 
> > You received this message because you are subscribed to the Google 
> > Groups "Android Developers" group. 
> > To post to this group, send email to android-developers@googlegroups.com 
> > To unsubscribe from this group, send email to 
> > android-developers+unsubscr...@googlegroups.com 
> > For more options, visit this group at 
> > http://groups.google.com/group/android-developers?hl=en 
>

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