AAC/SBR decoder improvements and bugfixes

* AAC-Decoder

   - Add support for AOT 20 (ER-AAC scalable) (base layer only)
   - Add support for AAC as used in Digital Radio Mondiale (DRM30/DRM+)
     Modified file(s):
        libAACdec/src/aacdecoder.cpp
        libAACdec/src/aacdecoder_lib.cpp
        libFDK/src/FDK_core.cpp
        libFDK/src/FDK_tools_rom.cpp
        libMpegTPDec/src/tpdec_asc.cpp
        libMpegTPDec/src/tpdec_lib.cpp
        libMpegTPDec/src/version
        libSBRdec/include/sbrdecoder.h
        libSBRdec/src/env_extr.h
        libSBRdec/src/sbrdecoder.cpp
     Added file(s):
        libMpegTPDec/src/tpdec_drm.cpp
        libMpegTPDec/src/tpdec_drm.h

   - Fix sanity check in HCR module that was performed at the wrong point in time.
     Modified file(s):
        libAACdec/src/aacdecoder_lib.cpp
        libAACdec/src/block.cpp

   - Extend core sampling rate support up to 96 kHz.
     Modified file(s):
        libAACdec/src/aac_rom.cpp
        libAACdec/src/aacdecoder.cpp
        libAACdec/src/aacdecoder_lib.cpp

   - Return correct audio output channel description according number of output
     channels.
     Modified file(s):
        libAACdec/src/aacdecoder_lib.cpp

   - Indroduce decoder intern output buffer. This change allows to use framework
     output buffer with the actual size of the deocder output channels.
     Modified file(s):
        libAACdec/include/aacdecoder_lib.h
        libAACdec/src/aacdecoder.h
        libAACdec/src/aacdecoder_lib.cpp

* SBR-Decoder

   - Increase robustness for erroneous input data.
   - Improve error concealment performance.
   - Fix handling of lowest sub-band for LD-SBR
     Modified file(s):
        libAACdec/src/aacdecoder.cpp
        libAACdec/src/aacdecoder_lib.cpp
        libSBRdec/src/env_calc.cpp
        libSBRdec/src/env_dec.cpp
        libSBRdec/src/env_extr.cpp
        libSBRdec/src/env_extr.h
        libSBRdec/src/sbr_dec.cpp
        libSBRdec/src/sbr_rom.cpp
        libSBRdec/src/sbr_rom.h
        libSBRdec/src/sbrdecoder.cpp

   - Add QMF delay compensation for ELD v2 streams decoded with the complex
     low delay filter-bank.
     Modified file(s):
        libSBRdec/src/sbr_dec.cpp
        libSBRdec/src/sbr_dec.h
        libSBRdec/src/sbrdecoder.cpp

   - Introduce a different handling of frames to be flushed
     dependent on whether there are delayed frames available or not.
     Modified file(s):
        libSBRdec/src/sbr_ram.h
        libSBRdec/src/sbrdecoder.cpp

   - Calculate the correct number of samples for dual-mono copy in case of no
     available PS data.
     Modified file(s):
        libSBRdec/src/sbrdecoder.cpp

* SYS-Library

   - Change include order of genericStds.h to prevent conflict with definitions
     which are also used in math.h.
     Modified file(s):
        libSYS/src/genericStds.cpp

Change-Id: I3ecffbad85f39b056213107955cfadbeb3f4b6e1

2 files changed, 197 insertions, 3 deletions

diff --git a/libFDK/src/FDK_core.cpp b/libFDK/src/FDK_core.cpp
index f4b510d..1d8ac7b 100644
--- a/libFDK/src/FDK_core.cpp
+++ b/libFDK/src/FDK_core.cpp
@@ -93,7 +93,7 @@ amm-info@iis.fraunhofer.de
 /* FDK tools library info */
 #define FDK_TOOLS_LIB_VL0 2
 #define FDK_TOOLS_LIB_VL1 3
-#define FDK_TOOLS_LIB_VL2 5
+#define FDK_TOOLS_LIB_VL2 6
 #define FDK_TOOLS_LIB_TITLE "FDK Tools"
 #ifdef __ANDROID__
 #define FDK_TOOLS_LIB_BUILD_DATE ""
diff --git a/libFDK/src/FDK_tools_rom.cpp b/libFDK/src/FDK_tools_rom.cpp
index 49f0ee1..29e37f2 100644
--- a/libFDK/src/FDK_tools_rom.cpp
+++ b/libFDK/src/FDK_tools_rom.cpp
@@ -2236,7 +2236,7 @@ static const rbd_id_t el_aac_cpe1_epc1[] = {
   ics_info,
   ms,
   ltp_data_present,
-  ltp_data,
+  /* ltp_data, */
   global_gain,
   section_data,
   scale_factor_data,
@@ -2247,7 +2247,7 @@ static const rbd_id_t el_aac_cpe1_epc1[] = {
   next_channel,
 
   ltp_data_present,
-  ltp_data,
+  /* ltp_data, */
   global_gain,
   section_data,
   scale_factor_data,
@@ -2290,7 +2290,178 @@ static const element_list_t node_aac_cpe_epc1 = {
   { &node_aac_cpe0_epc1, &node_aac_cpe1_epc1 }
 };
 
+/*
+ * AOT = 20
+ * epConfig = 0
+ */
+static const rbd_id_t el_scal_sce_epc0[] = {
+  ics_info,            /* ESC 1 */
+  tns_data_present,
+  ltp_data_present,
+  /* ltp_data, */
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  esc2_rvlc,           /* ESC 2 */
+  tns_data,            /* ESC 3 */
+  spectral_data,       /* ESC 4 */
+  end_of_sequence
+};
+
+static const struct element_list node_scal_sce_epc0 = {
+  el_scal_sce_epc0,
+  { NULL, NULL }
+};
+
+static const rbd_id_t el_scal_cpe_epc0[] = {
+  ics_info,            /* ESC 0 */
+  ms,
+  tns_data_present,    /* ESC 1 (ch 0) */
+  ltp_data_present,
+  /* ltp_data, */
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  esc2_rvlc,           /* ESC 2 (ch 0) */
+  tns_data,            /* ESC 3 (ch 0) */
+  spectral_data,       /* ESC 4 (ch 0) */
+  next_channel,
+  tns_data_present,    /* ESC 1 (ch 1) */
+  ltp_data_present,
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  esc2_rvlc,           /* ESC 2 (ch 1) */
+  tns_data,            /* ESC 3 (ch 1) */
+  spectral_data,       /* ESC 4 (ch 1) */
+  end_of_sequence
+};
 
+static const struct element_list node_scal_cpe_epc0 = {
+  el_scal_cpe_epc0,
+  { NULL, NULL }
+};
+
+/*
+ * AOT = 20
+ * epConfig = 1
+ */
+static const rbd_id_t el_scal_sce_epc1[] = {
+  ics_info,
+  tns_data_present,
+  ltp_data_present,
+  /* ltp_data, */
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  tns_data,
+  spectral_data,
+  end_of_sequence
+};
+
+static const struct element_list node_scal_sce_epc1 = {
+  el_scal_sce_epc1,
+  { NULL, NULL }
+};
+
+static const rbd_id_t el_scal_cpe_epc1[] = {
+  ics_info,
+  ms,
+  tns_data_present,
+  ltp_data_present,
+  /* ltp_data, */
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  next_channel,
+  tns_data_present,
+  ltp_data_present,
+  /* ltp_data, */
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  next_channel,
+  tns_data,
+  next_channel,
+  tns_data,
+  next_channel,
+  spectral_data,
+  next_channel,
+  spectral_data,
+  end_of_sequence
+};
+
+static const struct element_list node_scal_cpe_epc1 = {
+  el_scal_cpe_epc1,
+  { NULL, NULL }
+};
+
+/*
+ * Pseudo AOT for DRM/DRM+ (similar to AOT 20)
+ * Derived from epConfig = 1
+ */
+static const rbd_id_t el_drm_sce[] = {
+  drmcrc_start_reg,
+  ics_info,
+  tns_data_present,
+  ltp_data_present,
+  /* ltp_data, */
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  tns_data,
+  drmcrc_end_reg,
+  spectral_data,
+  end_of_sequence
+};
+
+static const struct element_list node_drm_sce = {
+  el_drm_sce,
+  { NULL, NULL }
+};
+
+static const rbd_id_t el_drm_cpe[] = {
+  drmcrc_start_reg,
+  ics_info,
+  ms,
+  tns_data_present,
+  ltp_data_present,
+  /* ltp_data, */
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  next_channel,
+  tns_data_present,
+  ltp_data_present,
+  /* ltp_data, */
+  global_gain,
+  section_data,
+  scale_factor_data,
+  esc1_hcr,
+  next_channel,
+  tns_data,
+  next_channel,
+  tns_data,
+  drmcrc_end_reg,
+  next_channel,
+  spectral_data,
+  next_channel,
+  spectral_data,
+  end_of_sequence
+};
+
+static const struct element_list node_drm_cpe = {
+  el_drm_cpe,
+  { NULL, NULL }
+};
 
 /*
  * AOT = 39
@@ -2405,6 +2576,19 @@ const element_list_t * getBitstreamElementList(AUDIO_OBJECT_TYPE aot, SCHAR epCo
           return &node_aac_cpe_epc1;
       }
       break;
+    case AOT_ER_AAC_SCAL:
+      if (nChannels == 1) {
+        if (epConfig <= 0)
+          return &node_scal_sce_epc0;
+        else
+          return &node_scal_sce_epc1;
+      } else {
+        if (epConfig <= 0)
+          return &node_scal_cpe_epc0;
+        else
+          return &node_scal_cpe_epc1;
+      }
+      break;
     case AOT_ER_AAC_ELD:
       if (nChannels == 1) {
         if (epConfig <= 0)
@@ -2417,6 +2601,16 @@ const element_list_t * getBitstreamElementList(AUDIO_OBJECT_TYPE aot, SCHAR epCo
         else
           return &node_eld_cpe_epc1;
       }
+    case AOT_DRM_AAC:
+    case AOT_DRM_SBR:
+    case AOT_DRM_MPEG_PS:
+      FDK_ASSERT(epConfig == 1);
+      if (nChannels == 1) {
+        return &node_drm_sce;
+      } else {
+        return &node_drm_cpe;
+      }
+      break;
     default:
       break;
   }