Bug fixes in AAC decoder, AAC encoder, FDK library

Latest code drop from Fraunhofer:

* AAC-Decoder

   - Expanded AAC-LD/ELD decoder TNS max band tables to avoid wrong data
     access for sampling rates <22kHz and >48kHz.
     Modified file(s):
        libAACdec\src\aacdec_tns.cpp
        libAACdec\src\aac_rom.h
        libAACdec\src\aac_rom.cpp

  - Fixed ELD synthesis QMF filterbank scaling for downsampled SBR.
    Modified file(s):
        libFDK\src\qmf.cpp

* AAC-Encoder

  - Fixed bit rate limiting for lower limit as introduced in the Delivery 2012-05-11.
    Modified file(s):
        libAACenc\include\aacenc_lib.h
        libAACenc\src\aacenc.h
        libAACenc\src\aacenc.cpp
        libSBRenc\src\sbr_rom.h
        libSBRenc\src\sbr_rom.cpp

  - Allow negative prediction gain as meaning that there is no coding gain.
    Make use of scaleValueSaturate in gauss window calculation.
    Modified file(s):
        libAACenc\src\aacenc_tns.cpp

  - Added energy saturation to prevent overflow in short blocks.
    Modified file(s):
        libAACenc\src\grp_data.cpp

  - Perform scalefactor adaption in case quantized lines are out of valid range.
    Modified file(s):
        libAACenc\src\quantize.cpp

  - Interrupt quantization loop when no spectral data is available.
    Adjustments in bitreservoir adaption.
    Modified file(s):
        libAACenc\src\qc_main.cpp

  - Indroduced dynamic scaling in none missing harmonic energy lowering compensation.
    Modified file(s):
        libSBRenc\src\env_est.cpp

* FDK-Library

  - Fixed saturation for negative values in scaleValueSaturate.
    Modified file(s):
        libFDK\include\scale.h

Change-Id: If830ea65caef6b5554281e4b7a77a8b2e08825ce

1 files changed, 4 insertions, 7 deletions

diff --git a/libAACenc/src/aacenc.cpp b/libAACenc/src/aacenc.cpp
index 85083cd..d3f36aa 100644
--- a/libAACenc/src/aacenc.cpp
+++ b/libAACenc/src/aacenc.cpp
@@ -149,7 +149,7 @@ INT FDKaacEnc_LimitBitrate(
       transportBits = 208;
     }
 
-    bitRate = FDKmax(bitRate, ((((40 * nChannels) + transportBits + frameLength) * (coreSamplingRate)) / frameLength) );
+    bitRate = FDKmax(bitRate, ((((40 * nChannels) + transportBits) * (coreSamplingRate)) / frameLength) );
     FDK_ASSERT(bitRate >= 0);
 
     bitRate = FDKmin(bitRate, ((nChannelsEff * MIN_BUFSIZE_PER_EFF_CHAN)*(coreSamplingRate>>shift)) / (frameLength>>shift)) ;
@@ -280,7 +280,7 @@ void FDKaacEnc_AacInitDefaultConfig(AACENC_CONFIG *config)
     config->useTns          = TNS_ENABLE_MASK;      /* tns enabled completly */
     config->usePns          = 1;                    /* depending on channelBitrate this might be set to 0 later */
     config->useIS           = 1;                    /* Intensity Stereo Configuration */
-    config->framelength     = DEFAULT_FRAMELENGTH;  /* used frame size */
+    config->framelength     = -1;                   /* Framesize not configured */
     config->syntaxFlags     = 0;                    /* default syntax with no specialities */
     config->epConfig        = -1;                   /* no ER syntax -> no additional error protection */
     config->nSubFrames      = 1;                    /* default, no sub frames */
@@ -451,11 +451,8 @@ AAC_ENCODER_ERROR FDKaacEnc_Initialize(HANDLE_AAC_ENC      hAacEnc,
   switch (config->framelength)
   {
     case 1024:
-      if ( config->audioObjectType != AOT_AAC_LC
-        && config->audioObjectType != AOT_SBR
-        && config->audioObjectType != AOT_PS
-        && config->audioObjectType != AOT_ER_AAC_LC
-        && config->audioObjectType != AOT_AAC_SCAL )
+      if ( config->audioObjectType == AOT_ER_AAC_LD
+        || config->audioObjectType == AOT_ER_AAC_ELD )
       {
         return AAC_ENC_INVALID_FRAME_LENGTH;
       }