Support querying active record sources

Add support for querying whether there is currently a recording
 underway from the specified audio source.

Bug 7314859

Change-Id: I986b231a10ffd368b08ec2f9c7f348d28eaeb892

2 files changed, 26 insertions, 0 deletions

diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index 5624df4..207f96f 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -735,6 +735,15 @@ status_t AudioSystem::isStreamActive(audio_stream_type_t stream, bool* state, ui
     return NO_ERROR;
 }
 
+status_t AudioSystem::isSourceActive(audio_source_t stream, bool* state)
+{
+    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
+    if (aps == 0) return PERMISSION_DENIED;
+    if (state == NULL) return BAD_VALUE;
+    *state = aps->isSourceActive(stream);
+    return NO_ERROR;
+}
+
 int32_t AudioSystem::getPrimaryOutputSamplingRate()
 {
     const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
diff --git a/media/libmedia/IAudioPolicyService.cpp b/media/libmedia/IAudioPolicyService.cpp
index 31c5d27..401437c 100644
--- a/media/libmedia/IAudioPolicyService.cpp
+++ b/media/libmedia/IAudioPolicyService.cpp
@@ -52,6 +52,7 @@ enum {
     REGISTER_EFFECT,
     UNREGISTER_EFFECT,
     IS_STREAM_ACTIVE,
+    IS_SOURCE_ACTIVE,
     GET_DEVICES_FOR_STREAM,
     QUERY_DEFAULT_PRE_PROCESSING,
     SET_EFFECT_ENABLED
@@ -329,6 +330,15 @@ public:
         return reply.readInt32();
     }
 
+    virtual bool isSourceActive(audio_source_t source) const
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IAudioPolicyService::getInterfaceDescriptor());
+        data.writeInt32((int32_t) source);
+        remote()->transact(IS_SOURCE_ACTIVE, data, &reply);
+        return reply.readInt32();
+    }
+
     virtual status_t queryDefaultPreProcessing(int audioSession,
                                                effect_descriptor_t *descriptors,
                                                uint32_t *count)
@@ -592,6 +602,13 @@ status_t BnAudioPolicyService::onTransact(
             return NO_ERROR;
         } break;
 
+        case IS_SOURCE_ACTIVE: {
+            CHECK_INTERFACE(IAudioPolicyService, data, reply);
+            audio_source_t source = (audio_source_t) data.readInt32();
+            reply->writeInt32( isSourceActive(source));
+            return NO_ERROR;
+        }
+
         case QUERY_DEFAULT_PRE_PROCESSING: {
             CHECK_INTERFACE(IAudioPolicyService, data, reply);
             int audioSession = data.readInt32();