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Commit 18245759 authored by kuanyuhuang's avatar kuanyuhuang Committed by Tom Huang
Browse files

BT: add LOW_LATENCY mode if low latency allowed 

LatencyMode is not updatable after audio session started.
Currently, if low latency is allowed, audio session should have
LOW_LATENCY latency mode.
Create a workaround to add LOW_LATENCY when low_latency_allowed_ set to
ture at ReportLowLatencyModeAllowedChanged.

Bug: 291760415
Test: play low latency audio with supported headset and check
LOW_LATENCY mode can be selected
(cherry picked from https://android-review.googlesource.com/q/commit:25b4819e08280ea1bffa019a231e1d60edea7338)
Merged-In: Ie0626179a56334125cd48a048d162f09882888eb
Merged-In: I9d5510116225aa5857d1bd086956bc46d46a3eba
Change-Id: Ia324f0a368e47ae8b8056c190d8d1f4a2e09ecec
parent a754fb75

bluetooth/audio/utils/aidl_session/BluetoothAudioSession.cpp

+10 −0
Original line number Diff line number Diff line
@@ -440,6 +440,16 @@ void BluetoothAudioSession::ReportControlStatus(bool start_resp, 
void BluetoothAudioSession::ReportLowLatencyModeAllowedChanged(bool allowed) {

  std::lock_guard<std::recursive_mutex> guard(mutex_);

  low_latency_allowed_ = allowed;

  // TODO(b/294498919): Remove this after there is API to update latency mode

  // after audio session started. If low_latency_allowed_ is true, the session

  // can support LOW_LATENCY and FREE LatencyMode.

  if (low_latency_allowed_) {

    if (std::find(latency_modes_.begin(), latency_modes_.end(),

                  LatencyMode::LOW_LATENCY) == latency_modes_.end()) {

      LOG(INFO) << __func__ << " - insert LOW_LATENCY LatencyMode";

      latency_modes_.push_back(LatencyMode::LOW_LATENCY);

    }

  }

  if (observers_.empty()) {

    LOG(WARNING) << __func__ << " - SessionType=" << toString(session_type_)

                 << " has NO port state observer";