Introduce aacDecoder_drcDisable() and always disable legacy DRC for USAC.

Bug: 176246647
Test: atest DecoderTestXheAac DecoderTestAacDrc
Change-Id: I75edf24b18e1f5392b6eb179d5574cb93fcbc7c2

3 files changed, 24 insertions, 8 deletions

diff --git a/libAACdec/src/aacdec_drc.cpp b/libAACdec/src/aacdec_drc.cpp
index b6f5b49..760a9ba 100644
--- a/libAACdec/src/aacdec_drc.cpp
+++ b/libAACdec/src/aacdec_drc.cpp
@@ -1,7 +1,7 @@
 /* -----------------------------------------------------------------------------
 Software License for The Fraunhofer FDK AAC Codec Library for Android
 
-© Copyright  1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
+© Copyright  1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
 Forschung e.V. All rights reserved.
 
  1.    INTRODUCTION
@@ -150,6 +150,19 @@ static INT convert_drcParam(FIXP_DBL param_dbl) {
 }
 
 /*!
+\brief  Disable DRC
+
+\self Handle of DRC info
+
+\return none
+*/
+void aacDecoder_drcDisable(HANDLE_AAC_DRC self) {
+  self->enable = 0;
+  self->applyExtGain = 0;
+  self->progRefLevelPresent = 0;
+}
+
+/*!
 \brief Reset DRC information
 
 \self Handle of DRC info
diff --git a/libAACdec/src/aacdec_drc.h b/libAACdec/src/aacdec_drc.h
index 76a44d6..2bb945d 100644
--- a/libAACdec/src/aacdec_drc.h
+++ b/libAACdec/src/aacdec_drc.h
@@ -1,7 +1,7 @@
 /* -----------------------------------------------------------------------------
 Software License for The Fraunhofer FDK AAC Codec Library for Android
 
-© Copyright  1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
+© Copyright  1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
 Forschung e.V. All rights reserved.
 
  1.    INTRODUCTION
@@ -140,6 +140,8 @@ typedef enum {
 /**
  * \brief DRC module interface functions
  */
+void aacDecoder_drcDisable(HANDLE_AAC_DRC self);
+
 void aacDecoder_drcReset(HANDLE_AAC_DRC self);
 
 void aacDecoder_drcInit(HANDLE_AAC_DRC self);
diff --git a/libAACdec/src/aacdecoder.cpp b/libAACdec/src/aacdecoder.cpp
index 965631b..414c3e2 100644
--- a/libAACdec/src/aacdecoder.cpp
+++ b/libAACdec/src/aacdecoder.cpp
@@ -2383,8 +2383,7 @@ CAacDecoder_Init(HANDLE_AACDECODER self, const CSAudioSpecificConfig *asc,
 
   if (*configChanged) {
     if (asc->m_aot == AOT_USAC) {
-      self->hDrcInfo->enable = 0;
-      self->hDrcInfo->progRefLevelPresent = 0;
+      aacDecoder_drcDisable(self->hDrcInfo);
     }
   }
 
@@ -3194,11 +3193,12 @@ LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
          * data in the bitstream. */
         self->flags[streamIndex] |= AC_DRC_PRESENT;
       } else {
-        self->hDrcInfo->enable = 0;
-        self->hDrcInfo->progRefLevelPresent = 0;
         ErrorStatus = AAC_DEC_UNSUPPORTED_FORMAT;
       }
     }
+    if (self->flags[streamIndex] & (AC_USAC | AC_RSV603DA)) {
+      aacDecoder_drcDisable(self->hDrcInfo);
+    }
 
     /* Create a reverse mapping table */
     UCHAR Reverse_chMapping[((8) * 2)];
@@ -3441,11 +3441,12 @@ LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
          * data in the bitstream. */
         self->flags[streamIndex] |= AC_DRC_PRESENT;
       } else {
-        self->hDrcInfo->enable = 0;
-        self->hDrcInfo->progRefLevelPresent = 0;
         ErrorStatus = AAC_DEC_UNSUPPORTED_FORMAT;
       }
     }
+    if (self->flags[streamIndex] & (AC_USAC | AC_RSV603DA)) {
+      aacDecoder_drcDisable(self->hDrcInfo);
+    }
   }
 
   /* Add additional concealment delay */