extractors: allow OEM to control output type for WAV/FLAC

Based on some usecase, outputing in float is not an option.

Should allow a property to select the behavior

Bug: 140952553
Test: NativeDecoderTest#testExtractor
Test: MediaExtractorTest#testFlacIdentity
Change-Id: Idf2bf382f50d12c00a85aa7bb5582fb0439c6ea1
Signed-off-by: Jean-Baptiste Théou <jb@essential.com>

media/extractors/flac/Android.bp

@@ -9,6 +9,7 @@ cc_library {
     ],
 
     shared_libs: [
+        "libbase",
         "libbinder_ndk",
     ],
 

media/extractors/flac/FLACExtractor.cpp

@@ -24,6 +24,7 @@
 // libFLAC parser
 #include "FLAC/stream_decoder.h"
 
+#include <android-base/properties.h>
 #include <android/binder_ibinder.h> // for AIBinder_getCallingUid
 #include <audio_utils/primitives.h>
 #include <media/MediaExtractorPluginApi.h>
@@ -47,7 +48,8 @@ namespace android {
 // (Note: duplicated with WAVExtractor.cpp)
 static inline bool shouldExtractorOutputFloat(int bitsPerSample)
 {
-    return bitsPerSample > 16 && AIBinder_getCallingUid() == AID_MEDIA;
+    return bitsPerSample > 16 && AIBinder_getCallingUid() == AID_MEDIA
+                              && android::base::GetBoolProperty("media.extractor.float", true);
 }
 
 class FLACParser;

media/extractors/wav/Android.bp

@@ -10,6 +10,7 @@ cc_library {
     ],
 
     shared_libs: [
+        "libbase",
         "libbinder_ndk",
     ],
 

media/extractors/wav/WAVExtractor.cpp

@@ -20,6 +20,7 @@
 
 #include "WAVExtractor.h"
 
+#include <android-base/properties.h>
 #include <android/binder_ibinder.h> // for AIBinder_getCallingUid
 #include <audio_utils/primitives.h>
 #include <media/stagefright/foundation/ADebug.h>
@@ -43,7 +44,8 @@ namespace android {
 // (Note: duplicated with FLACExtractor.cpp)
 static inline bool shouldExtractorOutputFloat(int bitsPerSample)
 {
-    return bitsPerSample > 16 && AIBinder_getCallingUid() == AID_MEDIA;
+    return bitsPerSample > 16 && AIBinder_getCallingUid() == AID_MEDIA
+                              && android::base::GetBoolProperty("media.extractor.float", true);
 }
 
 enum {