AAC Encoder low delay quality

* AAC-Encoder

   - Revise bit distribution for lowdelay configuration to improve encoder
     audio quality.
   - Adjust lowdelay bitreservoir for low bitreservoir configuration.
     Modified file(s):
        libAACenc\src\aacEnc_ram.cpp
        libAACenc\src\aacenc.cpp
        libAACenc\src\aacenc_lib.cpp
        libAACenc\src\aacenc_tns.cpp
        libAACenc\src\adj_thr.cpp
        libAACenc\src\adj_thr.h
        libAACenc\src\block_switch.cpp
        libAACenc\src\block_switch.h
        libAACenc\src\interface.h
        libAACenc\src\psy_main.cpp
        libAACenc\src\qc_data.h
        libAACenc\src\qc_main.cpp

* FDK-Library

   - Increase the accuracy in CalcInvLdData() calculation which improves the
     encoder audio quality.
     Modified file(s):
        libFDK\src\fixpoint_math.cpp

Bug 9428126

Change-Id: I302d7f4c3aeccf79e1b85f20e18a31e6e2b10544

1 files changed, 3 insertions, 1 deletions

diff --git a/libAACenc/src/qc_data.h b/libAACenc/src/qc_data.h
index be6d158..51e66c6 100644
--- a/libAACenc/src/qc_data.h
+++ b/libAACenc/src/qc_data.h
@@ -143,6 +143,8 @@ struct QC_INIT{
   INT maxBits;     /* maximum number of bits in reservoir  */
   INT averageBits; /* average number of bits we should use */
   INT bitRes;
+  INT sampleRate;       /* output sample rate                   */
+  INT advancedBitsToPe; /* if set, calc bits2PE factor depending on samplerate */
   INT staticBits;  /* Bits per frame consumed by transport layers. */
   QCDATA_BR_MODE bitrateMode;
   INT meanPe;
@@ -252,7 +254,7 @@ typedef struct
   INT minBitsPerFrame;   /* minimal allowd bits per fram, superframing - DRM */
   INT nElements;
   QCDATA_BR_MODE bitrateMode;
-  INT bitDistributenMode; /* 0: full bitreservoir, 1: reduced bitreservoir, 2: disabled bitreservoir */
+  INT bitDistributionMode; /* 0: full bitreservoir, 1: reduced bitreservoir, 2: disabled bitreservoir */
   INT bitResTot;
   INT bitResTotMax;
   INT maxIterations;      /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */