diff options
3 files changed, 41 insertions, 3 deletions
diff --git a/services/audiopolicy/common/managerdefinitions/include/AudioInputDescriptor.h b/services/audiopolicy/common/managerdefinitions/include/AudioInputDescriptor.h index 18bcfdb..48d09ed 100644 --- a/services/audiopolicy/common/managerdefinitions/include/AudioInputDescriptor.h +++ b/services/audiopolicy/common/managerdefinitions/include/AudioInputDescriptor.h @@ -56,9 +56,21 @@ public: const struct audio_port_config *srcConfig = NULL) const; virtual sp<AudioPort> getAudioPort() const { return mProfile; } void toAudioPort(struct audio_port *port) const; + void setPreemptedSessions(const SortedVector<audio_session_t>& sessions); + SortedVector<audio_session_t> getPreemptedSessions() const; + bool hasPreemptedSession(audio_session_t session) const; + void clearPreemptedSessions(); private: audio_port_handle_t mId; + // Because a preemtible capture session can preempt another one, we end up in an endless loop + // situation were each session is allowed to restart after being preempted, + // thus preempting the other one which restarts and so on. + // To avoid this situation, we store which audio session was preempted when + // a particular input started and prevent preemption of this active input by this session. + // We also inherit sessions from the preempted input to avoid a 3 way preemption loop etc... + SortedVector<audio_session_t> mPreemptedSessions; + }; class AudioInputCollection : diff --git a/services/audiopolicy/common/managerdefinitions/src/AudioInputDescriptor.cpp b/services/audiopolicy/common/managerdefinitions/src/AudioInputDescriptor.cpp index 937160b..626fdae 100644 --- a/services/audiopolicy/common/managerdefinitions/src/AudioInputDescriptor.cpp +++ b/services/audiopolicy/common/managerdefinitions/src/AudioInputDescriptor.cpp @@ -93,6 +93,26 @@ void AudioInputDescriptor::toAudioPort(struct audio_port *port) const port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL; } +void AudioInputDescriptor::setPreemptedSessions(const SortedVector<audio_session_t>& sessions) +{ + mPreemptedSessions = sessions; +} + +SortedVector<audio_session_t> AudioInputDescriptor::getPreemptedSessions() const +{ + return mPreemptedSessions; +} + +bool AudioInputDescriptor::hasPreemptedSession(audio_session_t session) const +{ + return (mPreemptedSessions.indexOf(session) >= 0); +} + +void AudioInputDescriptor::clearPreemptedSessions() +{ + mPreemptedSessions.clear(); +} + status_t AudioInputDescriptor::dump(int fd) { const size_t SIZE = 256; diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp index dfb477d..8419ed5 100644 --- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp +++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp @@ -1485,10 +1485,15 @@ status_t AudioPolicyManager::startInput(audio_io_handle_t input, // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed, // otherwise the active input continues and the new input cannot be started. sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput); - if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) { + if ((activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) && + !activeDesc->hasPreemptedSession(session)) { ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput); - stopInput(activeInput, activeDesc->mSessions.itemAt(0)); - releaseInput(activeInput, activeDesc->mSessions.itemAt(0)); + audio_session_t activeSession = activeDesc->mSessions.itemAt(0); + SortedVector<audio_session_t> sessions = activeDesc->getPreemptedSessions(); + sessions.add(activeSession); + inputDesc->setPreemptedSessions(sessions); + stopInput(activeInput, activeSession); + releaseInput(activeInput, activeSession); } else { ALOGE("startInput(%d) failed: other input %d already started", input, activeInput); return INVALID_OPERATION; @@ -1592,6 +1597,7 @@ status_t AudioPolicyManager::stopInput(audio_io_handle_t input, if (mInputs.activeInputsCount() == 0) { SoundTrigger::setCaptureState(false); } + inputDesc->clearPreemptedSessions(); } return NO_ERROR; } |