commit 4519c32f528e079f25cb2afc594ecf625f943782
author Oskar Sundbom <ossu@chromium.org> Tue May 29 10:33:47 2018
committer Commit Bot <commit-bot@chromium.org> Tue May 29 10:33:47 2018
tree 42e217f561c1b2c666580c0f79576c267f8a2014
parent a0bcd85d067b98f7c0febbf58b69ecdcdfdacde8

PulseAudio: Filter out unavailable inputs and refuse to open monitor inputs

If there are no available inputs, PulseAudio will, for some reason,
select the monitor of the current default sink as the default source.
Chrome will only add a Default input to the device enumeration if
there is at least one valid input found. Currently, we also include
unavailable inputs in the device enumeration, which means Chrome will
show a Default device, which in that case would likely be a monitor
device, rather than a proper input.

This CL stops this happening by not enumerating inputs that don't have
an available, active port. In case PulseAudio would _still_ pick a
monitor device as the default device, this CL also explicitly returns
invalid AudioParameters for monitor devices, and explicitly fails to
open them as inputs - to be on the safe side.

Bug: b/79580580
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I25bd96e98a48bcdf6e993759e97bf713855d4ad0
Reviewed-on: https://chromium-review.googlesource.com/1064373
Commit-Queue: Oskar Sundbom <ossu@chromium.org>
Reviewed-by: Max Morin <maxmorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562383}