audio policy for concurrent capture.
First implementation of concurrent capture policy:
Initially, only capture for HOTWORD or FM TUNER sources or
re-route submix is allowed at the same time as any other capture.
Several capture clients can share the same input stream. In this case
active clients are sorted by audio source priority level and the input
path configuration and routing is driven by the highest priority
active source.
Bug: 22702906
Change-Id: Icbedfe001c6243ecad7a7b57ab78d893b2b97402
diff --git a/services/audiopolicy/common/include/policy.h b/services/audiopolicy/common/include/policy.h
index 34984f9..e3ee4e5 100755
--- a/services/audiopolicy/common/include/policy.h
+++ b/services/audiopolicy/common/include/policy.h
@@ -30,9 +30,9 @@
/**
* A device mask for all audio input devices that are considered "virtual" when evaluating
- * active inputs in getActiveInput()
+ * active inputs in getActiveInputs()
*/
-#define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX|AUDIO_DEVICE_IN_FM_TUNER)
+#define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX)
/**
@@ -88,3 +88,41 @@
(((device & AUDIO_DEVICE_BIT_IN) == 0) &&
((device & APM_AUDIO_DEVICE_OUT_MATCH_ADDRESS_ALL) != 0));
}
+
+/**
+ * Returns the priority of a given audio source for capture. The priority is used when more than one
+ * capture session is active on a given input stream to determine which session drives routing and
+ * effect configuration.
+ *
+ * @param[in] inputSource to consider. Valid sources are:
+ * - AUDIO_SOURCE_VOICE_COMMUNICATION
+ * - AUDIO_SOURCE_CAMCORDER
+ * - AUDIO_SOURCE_MIC
+ * - AUDIO_SOURCE_FM_TUNER
+ * - AUDIO_SOURCE_VOICE_RECOGNITION
+ * - AUDIO_SOURCE_HOTWORD
+ *
+ * @return the corresponding input source priority or 0 if priority is irrelevant for this source.
+ * This happens when the specified source cannot share a given input stream (e.g remote submix)
+ * The higher the value, the higher the priority.
+ */
+static inline int32_t source_priority(audio_source_t inputSource)
+{
+ switch (inputSource) {
+ case AUDIO_SOURCE_VOICE_COMMUNICATION:
+ return 6;
+ case AUDIO_SOURCE_CAMCORDER:
+ return 5;
+ case AUDIO_SOURCE_MIC:
+ return 4;
+ case AUDIO_SOURCE_FM_TUNER:
+ return 3;
+ case AUDIO_SOURCE_VOICE_RECOGNITION:
+ return 2;
+ case AUDIO_SOURCE_HOTWORD:
+ return 1;
+ default:
+ break;
+ }
+ return 0;
+}