[Bug 743758] osxaudiosrc supports only 44100 sample rate on iOS

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=743758

Ilya Konstantinov <ilya.konstantinov at gmail.com> changed:

           What    |Removed                     |Added
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 Attachment #297486|rejected                    |none
             status|                            |
 Attachment #297486|0                           |1
        is obsolete|                            |

--- Comment #15 from Ilya Konstantinov <ilya.konstantinov at gmail.com> ---
Created attachment 298195
  --> https://bugzilla.gnome.org/attachment.cgi?id=298195&action=edit
osxaudio: Overhaul probing caps -- PATCH OF DOOM!

I've intended this to be much smaller, but ended up with a 47K patch. On the
upside, this is a lot of the things we wanted:

 - preferred caps + template caps
 - channel layout support on both OS X and iOS
 - respecting hardware format changes (via property listeners)

REVIEW

I'm looking for feedback, including but not limited to "holy shit, it's
unreviewable!".

I'll be available on IRC to discuss.

TESTING

I gave special attention to channel layouts, and exercised it thoroughly on OS
X with a Soundflower 64-channel virtual device -- in both unpositioned and
positioned (5.1) modes. I've used the built-in Audio MIDI Setup utility app on
OS X to change speaker setups on the Soundflower device, then re-test.

To make sure the audio actually flows into a Soundflower, use AU Lab and link
the Soundflower to Built-in Output.

TESTING TOOLS

- Soundflower -- https://rogueamoeba.com/freebies/soundflower/
- AU Lab -- get "Audio Tools for Xcode" through
https://developer.apple.com/downloads/index.action?name=for%20Xcode%20-

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