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

4 files changed, 20 insertions, 23 deletions

diff --git a/libSBRenc/src/env_est.cpp b/libSBRenc/src/env_est.cpp
index 9423f27..a9a7881 100644
--- a/libSBRenc/src/env_est.cpp
+++ b/libSBRenc/src/env_est.cpp
@@ -536,13 +536,18 @@ mhLoweringEnergy(FIXP_DBL nrg, INT M)
   \return void
 
 ****************************************************************************/
-static FIXP_DBL
-nmhLoweringEnergy(FIXP_DBL nrg, FIXP_DBL nrgSum, INT M)
+static FIXP_DBL nmhLoweringEnergy(
+        FIXP_DBL nrg,
+        const FIXP_DBL nrgSum,
+        const INT nrgSum_scale,
+        const INT M
+        )
 {
   if (nrg>FL2FXCONST_DBL(0)) {
     int sc=0;
     /* gain = nrgSum / (nrg*(M+1)) */
     FIXP_DBL gain = fMult(fDivNorm(nrgSum, nrg, &sc), GetInvInt(M+1));
+    sc += nrgSum_scale;
 
     /* reduce nrg if gain smaller 1.f */
     if ( !((sc>=0) && ( gain > ((FIXP_DBL)MAXVAL_DBL>>sc) )) ) {
@@ -616,6 +621,7 @@ calculateSbrEnvelope (FIXP_DBL **RESTRICT YBufferLeft,  /*! energy buffer left *
 
     FIXP_DBL pNrgLeft[QMF_MAX_TIME_SLOTS];
     FIXP_DBL pNrgRight[QMF_MAX_TIME_SLOTS];
+    int envNrg_scale;
     FIXP_DBL envNrgLeft  = FL2FXCONST_DBL(0.0f);
     FIXP_DBL envNrgRight = FL2FXCONST_DBL(0.0f);
     int      missingHarmonic[QMF_MAX_TIME_SLOTS];
@@ -625,6 +631,7 @@ calculateSbrEnvelope (FIXP_DBL **RESTRICT YBufferLeft,  /*! energy buffer left *
     stop_pos = timeStep * frame_info->borders[i + 1];
     freq_res = frame_info->freqRes[i];
     no_of_bands = h_con->nSfb[freq_res];
+    envNrg_scale = DFRACT_BITS-fNormz((FIXP_DBL)no_of_bands);
 
     if (i == short_env) {
       stop_pos -= fixMax(2, timeStep);  /* consider at least 2 QMF slots less for short envelopes (envelopes just before transients) */
@@ -762,9 +769,8 @@ calculateSbrEnvelope (FIXP_DBL **RESTRICT YBufferLeft,  /*! energy buffer left *
       /* save energies */
       pNrgLeft[j]  = nrgLeft;
       pNrgRight[j] = nrgRight;
-      envNrgLeft  += nrgLeft;
-      envNrgRight += nrgRight;
-
+      envNrgLeft  += (nrgLeft>>envNrg_scale);
+      envNrgRight += (nrgRight>>envNrg_scale);
     } /* j */
 
     for (j = 0; j < no_of_bands; j++) {
@@ -777,9 +783,9 @@ calculateSbrEnvelope (FIXP_DBL **RESTRICT YBufferLeft,  /*! energy buffer left *
       if(!missingHarmonic[j] && h_sbr->fLevelProtect) {
         /* in case of missing energy in base band,
            reduce reference energy to prevent overflows in decoder output */
-        nrgLeft = nmhLoweringEnergy(nrgLeft, envNrgLeft, no_of_bands);
+        nrgLeft = nmhLoweringEnergy(nrgLeft, envNrgLeft, envNrg_scale, no_of_bands);
         if (stereoMode == SBR_COUPLING) {
-          nrgRight = nmhLoweringEnergy(nrgRight, envNrgRight, no_of_bands);
+          nrgRight = nmhLoweringEnergy(nrgRight, envNrgRight, envNrg_scale, no_of_bands);
         }
       }
 
diff --git a/libSBRenc/src/sbr_encoder.cpp b/libSBRenc/src/sbr_encoder.cpp
index 0dcc1b2..e991199 100644
--- a/libSBRenc/src/sbr_encoder.cpp
+++ b/libSBRenc/src/sbr_encoder.cpp
@@ -103,7 +103,7 @@ amm-info@iis.fraunhofer.de
 
 #define SBRENCODER_LIB_VL0 3
 #define SBRENCODER_LIB_VL1 2
-#define SBRENCODER_LIB_VL2 1
+#define SBRENCODER_LIB_VL2 2
 
 
 
diff --git a/libSBRenc/src/sbr_rom.cpp b/libSBRenc/src/sbr_rom.cpp
index 6fd51a2..c8b945f 100644
--- a/libSBRenc/src/sbr_rom.cpp
+++ b/libSBRenc/src/sbr_rom.cpp
@@ -588,7 +588,7 @@ const sbrTuningTable_t sbrTuningTable[SBRENC_TUNING_SIZE] =
   { 100000,160001, 44100, 1, 13,13,11,11,  2, 0, 3, SBR_MONO, 1 }, /* backwards compatible */
 
   /* 48/96 kHz dual rate */  /* not yet finally tuned */
-  {  24000, 36000, 48000, 1,  4, 4, 9, 9,  2, 0, 3, SBR_MONO, 3 }, /* lowest range (multichannel rear) */
+  {  32000, 36000, 48000, 1,  4, 4, 9, 9,  2, 0, 3, SBR_MONO, 3 }, /* lowest range (multichannel rear) */
   {  36000, 60000, 48000, 1,  7, 7,10,10,  2, 0, 3, SBR_MONO, 2 }, /* nominal: 40 */
   {  60000, 72000, 48000, 1,  9, 9,10,10,  2, 0, 3, SBR_MONO, 1 }, /* nominal: 64 */
   {  72000,100000, 48000, 1, 11,11,11,11,  2, 0, 3, SBR_MONO, 1 }, /* nominal: 80 */
@@ -671,7 +671,7 @@ const sbrTuningTable_t sbrTuningTable[SBRENC_TUNING_SIZE] =
   { 144000,256001, 44100, 2, 13,13,11,11,  3, 0, -3, SBR_LEFT_RIGHT, 1 }, /* backwards compatible */
 
   /* 48/96 kHz dual rate */  /* not yet finally tuned */
-  {  32000, 60000, 48000, 2,  4, 4, 9, 9,  2, 0, -3, SBR_SWITCH_LRC, 3 }, /* lowest range (multichannel rear) */
+  {  36000, 60000, 48000, 2,  4, 4, 9, 9,  2, 0, -3, SBR_SWITCH_LRC, 3 }, /* lowest range (multichannel rear) */
   {  60000, 80000, 48000, 2,  7, 7, 9, 9,  3, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 64 */
   {  80000,112000, 48000, 2,  9, 9,10,10,  3, 0, -3, SBR_LEFT_RIGHT, 1 }, /* nominal: 96 */
   { 112000,144000, 48000, 2, 11,11,11,11,  3, 0, -3, SBR_LEFT_RIGHT, 1 }, /* nominal: 128 */
@@ -680,9 +680,6 @@ const sbrTuningTable_t sbrTuningTable[SBRENC_TUNING_SIZE] =
   /** AAC LOW DELAY SECTION **/
 
   /* 22.05/44.1 kHz dual rate */
-  {  8000, 11369,  22050, 1,  1, 1, 1, 1,  1, 0, 6, SBR_MONO, 3 }, /* nominal:  8 kbit/s */ /**changed (not changed !!)*/
-  { 11369, 16000,  22050, 1,  1, 0, 3, 3,  1, 0, 6, SBR_MONO, 3 }, /* nominal: 12 kbit/s */
-  { 16000, 18000,  22050, 1,  2, 4, 4, 3,  1, 0, 6, SBR_MONO, 3 }, /* nominal: 16 kbit/s */
   { 18000, 22000,  22050, 1,  4, 4, 5, 5,  2, 0, 6, SBR_MONO, 2 }, /* nominal: 20 kbit/s */
   { 22000, 28000,  22050, 1,  4, 4, 6, 5,  2, 0, 6, SBR_MONO, 2 }, /* nominal: 24 kbit/s */
   { 28000, 36000,  22050, 1,  7, 8, 8, 8,  2, 0, 3, SBR_MONO, 2 }, /* nominal: 32 kbit/s */
@@ -691,10 +688,7 @@ const sbrTuningTable_t sbrTuningTable[SBRENC_TUNING_SIZE] =
   { 52000, 64001,  22050, 1, 12,11,11,11,  2, 0, 3, SBR_MONO, 1 }, /* nominal: 56 kbit/s */
 
   /* 24/48 kHz dual rate */
-  {  8000, 12000,  24000, 1,  1, 1, 1, 1,  1, 0, 6, SBR_MONO, 3 }, /* nominal:  8 kbit/s */ /**changed (not changed !!)*/
-  { 12000, 16000,  24000, 1,  1, 0, 3, 3,  1, 0, 6, SBR_MONO, 3 }, /* nominal: 12 kbit/s */
-  { 16000, 18000,  24000, 1,  2, 4, 4, 3,  1, 0, 6, SBR_MONO, 3 }, /* nominal: 16 kbit/s */
-  { 18000, 22000,  24000, 1,  4, 4, 5, 5,  2, 0, 6, SBR_MONO, 2 }, /* nominal: 20 kbit/s */
+  { 20000, 22000,  24000, 1,  4, 4, 5, 5,  2, 0, 6, SBR_MONO, 2 }, /* nominal: 20 kbit/s */
   { 22000, 28000,  24000, 1,  4, 4, 6, 5,  2, 0, 6, SBR_MONO, 2 }, /* nominal: 24 kbit/s */
   { 28000, 36000,  24000, 1,  6, 8, 8, 8,  2, 0, 3, SBR_MONO, 2 }, /* nominal: 32 kbit/s */
   { 36000, 44000,  24000, 1,  8, 9, 9, 9,  2, 0, 3, SBR_MONO, 1 }, /* nominal: 40 kbit/s */
@@ -702,8 +696,6 @@ const sbrTuningTable_t sbrTuningTable[SBRENC_TUNING_SIZE] =
   { 52000, 64001,  24000, 1, 13,11,11,10,  2, 0, 3, SBR_MONO, 1 }, /* nominal: 48 kbit/s */
 
   /* 22.05/44.1 kHz dual rate */
-  { 24000, 28000,  22050, 2,  3, 2, 5, 4,  1, 0, -3, SBR_SWITCH_LRC, 3 }, /* nominal: 24 kbit/s */
-  { 28000, 32000,  22050, 2,  3, 2, 7, 6,  2, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 28 kbit/s */
   { 32000, 36000,  22050, 2,  5, 4, 7, 6,  2, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 32 kbit/s */
   { 36000, 44000,  22050, 2,  5, 8, 8, 8,  2, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 40 kbit/s */
   { 44000, 52000,  22050, 2,  7,10, 8, 8,  3, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 48 kbit/s */
@@ -713,8 +705,7 @@ const sbrTuningTable_t sbrTuningTable[SBRENC_TUNING_SIZE] =
   { 82000,128001,  22050, 2, 13,12,11,11,  3, 0, -3, SBR_LEFT_RIGHT, 1 }, /* nominal: 80 kbit/s */
 
   /* 24/48 kHz dual rate */
-  { 24000, 28000,  24000, 2,  3, 3, 5, 5,  1, 0, -3, SBR_SWITCH_LRC, 3 }, /* nominal: 24 kbit/s */
-  { 28000, 36000,  24000, 2,  5, 4, 7, 6,  2, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 32 kbit/s */
+  { 32000, 36000,  24000, 2,  5, 4, 7, 6,  2, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 32 kbit/s */
   { 36000, 44000,  24000, 2,  4, 8, 8, 8,  2, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 40 kbit/s */
   { 44000, 52000,  24000, 2,  6,10, 8, 8,  3, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 48 kbit/s */
   { 52000, 60000,  24000, 2,  9,11, 9, 9,  3, 0, -3, SBR_SWITCH_LRC, 1 }, /* nominal: 56 kbit/s */
diff --git a/libSBRenc/src/sbr_rom.h b/libSBRenc/src/sbr_rom.h
index 4cd1ba5..e79a730 100644
--- a/libSBRenc/src/sbr_rom.h
+++ b/libSBRenc/src/sbr_rom.h
@@ -119,8 +119,8 @@ extern const INT           bookSbrNoiseBalanceC11T[25];
 extern const UCHAR         bookSbrNoiseBalanceL11T[25];
 
 #define SBRENC_AACLC_TUNING_SIZE   124
-#define SBRENC_AACELD_TUNING_SIZE   35
-#define SBRENC_AACELD2_TUNING_SIZE  31
+#define SBRENC_AACELD_TUNING_SIZE   (26)
+#define SBRENC_AACELD2_TUNING_SIZE  (26)
 
 #define SBRENC_TUNING_SIZE (SBRENC_AACLC_TUNING_SIZE + SBRENC_AACELD_TUNING_SIZE)