Check the right element in isBook

This makes sure we read the right array element, corresponding
to all other array accesses in the same function, and all other
use of the isBook array elsewhere in the library.

This makes the fix in the previous commit ("Avoid too big changes
in isScale") work as intended, fixing other samples that triggered
assertions.
Include dependency libs (-lm) in the pkg-config file
Bump the version number, add a changelog entry
Fix HE-AAC SBR ignored high-freq data


Change-Id: I12d284477f07349368e714ba52cbb2a47b024554
(cherry picked from commit a889574e60a02bbc647d3b078d2727cb48d82e5a)
Disclaimer update, lib version increment

- Update disclaimer in all source files.
- Increment library version in each FDK sub-module.

Bug 9428126

Change-Id: I490b96d4ee472246b01483202b0bb4f1e9c2a5d7
Decode and SYS lib cleanup

* AAC-Encoder

   - Remove source snippets related to unsupported frame length of 960.
   - Adjust minBits initialization for disabled VBR configuration.
     Modified file(s):
        libAACenc/src/aacenc.h
        libAACenc/src/aacenc_lib.cpp
        libAACenc/src/aacenc_tns.cpp
        libAACenc/src/bandwidth.cpp
        libAACenc/src/psy_const.h
        libAACenc/src/transform.h

   - Revise encoder parameter restrictions: "Error Resilient(ER) AAC Low Complexity"
     is not supported. Where the AAC part of the FDK encoder threw an
     initialization error, now the aacEncoder_SetParam() returns an error
     before initialization if the application tries to configure this
     audio object type.
     Modified file(s):
        libAACenc/src/aacenc_lib.cpp

* SYS-Library

   - Portability fix for Mingw32.
     Modified file(s):
        libSYS/include/machine_type.h

   - Minor changes.
     Modified file(s):
        libSYS/include/wav_file.h
        libSYS/src/wav_file.cpp
        libSYS/src/cmdl_parser.cpp
        libSYS/src/genericStds.cpp

Bug 9428126

Change-Id: I9fa44923d34f033d0dc607f2b85abacb8a85eb61
Encoder quantizer fix

AAC Encoder: Saturate quantizer shift value to prevent
  undefined behaviour.

In very rare cases the shift value 'totalShift = (16-4)-(3*(totalShift>>2))'
 can be greater than accu data width. If you apply a shift with more then
 31 bit the result depends on the architecture and is not defined in C.
For certain platforms zeros are shifted in. That would be our desired behaviour.
On other platforms the shift will be applied as modulo. For example >>34
 would be applied as >>2. To prevent this discrepancy the shift value
 is limited/saturated to DFRACT_BITS-1. 'accu >>= fixMin(totalShift,DFRACT_BITS-1)'.

Bug 9428126

Change-Id: I27177654c4dc22cf899bc35dad9cdd040dccb02d
Encoder intensity fix

AAC encoder: Prevent illegal intensity values delta coding at short blocks.

Bug 9428126

Change-Id: Ic287b86f3229022740f2317ea74aabe612de5e6b
SBR encoder improvement

SBR encoder: Introduce coupling energy ratio limitation to prevent undesirable SBR band
     amplification while decoding.

Bug 9428126

Change-Id: I18a77cd1a178fff7531b490779a29a0df7d993af
AAC encoder bitrate limitation

AAC encoder: Make the bit rate limiting functionality more stable for multichannel
     configurations where element bit rate for SBR can differ significantly.

Bug 9428126

Change-Id: I35b134c5b3c160a8f5a16b4314782b731fe49cd8
SBR header period

AAC encoder: Connect SBR and PS header repetition rate with AACENC_HEADER_PERIOD
     parameter of the encoder API.

Bug 9428126

Change-Id: Ia1ab965de9eaa2ac229d0c395a337cbd4d20cba1
AAC encoder metadata improvement

AAC-Encoder

   - Introduce metadata support for parametric stereo audio object type.
     Write metadata matrix mixdown coefficient only for channel config 5 and 6.
     Modified file(s):
        libAACenc/src/aacenc_lib.cpp

   - Revise metadata encoder downmix gain and fix matrix mixdown coefficient.
     Modified file(s):
        libAACenc/src/aacenc_lib.cpp
        libAACenc/src/metadata_compressor.cpp
        libMpegTPEnc/src/tpenc_asc.cpp
        libMpegTPEnc/src/tpenc_lib.cpp
        libMpegTPEnc/src/version

Bug 9428126

Change-Id: I87f5f1a1fdddd8223187aa0f9dc733e0ecc3e7e4
FDK update for downsampled SBR

Add missing support for downsampled SBR in libFDK

Bug 9428126

Change-Id: Idb732f8d31a115d36dd4b22916599db7fab98cae
Decode parametric stereo even with invalid channel config

AAC decoder: Allow decoding of Parametric Stereo (AOT 29) bitstreams
   with invalid channel config 2.

Bug 9428126

Change-Id: I1e8b801dfc0e6b1706421342d4985512e83f0dbe
Decode dynamic range control improvements

* AAC-Decoder

   - Only set the program reference level if it has changed compared to the
     previous value. This allows setting it on a frame-by-frame basis without
     limitations.
     Modified file(s):
        libAACdec/src/aacdec_drc.cpp
        libAACdec/src/aacdec_drc.h

   - Add expiry counter for the program reference level.
     Modified file(s):
        libAACdec/src/aacdec_drc.cpp
        libAACdec/src/aacdec_drc_types.h

   - Disable scaling of light compression gain values when heavy compression
     mode is enabled to have the full light compression as fallback if no heavy
     values are available.
     Modified file(s):
        libAACdec/src/aacdec_drc.cpp
        libAACdec/src/aacdecoder_lib.cpp
        libAACdec/src/aacdec_drc_types.h

   - Change initialization and channel disabling to improve start-up behavior in
     SBR decoder.
     Modified file(s):
        libSBRdec/src/sbrdecoder.cpp
        libSBRdec/src/sbrdec_drc.cpp

Bug 9428126

Change-Id: Ie1d3949c53910506da2547d32fe3bf6ee7606eb4
Decoder stability, sanity checks improvements

* AAC-Decoder

   - Improved PCE handling for saver (re-)configuration and metadata processing.
     Modified file(s):
        libAACdec/src/aacdecoder.cpp
        libAACdec/src/aacdecoder_lib.cpp

   - Transport layer changes (config found) -> to be evaluated.
     Modified file(s):
        libMpegTPDec/include/tpdec_lib.h
        libMpegTPDec/src/tpdec_latm.h
        libMpegTPDec/src/version
        libMpegTPDec/src/tpdec_asc.cpp
        libMpegTPDec/src/tpdec_lib.cpp
        libMpegTPDec/src/tpdec_adts.cpp
        libMpegTPDec/src/tpdec_latm.cpp
        libSYS/include/FDK_audio.h
        libSYS/src/genericStds.cpp

   - Enable concealment state machine to skip states if the corresponding
     parameter is set to zero.
     Modified file(s):
        libAACdec/src/conceal.cpp

   - Add some more sanity checks to avoid segmentation faults especially when
     setting dynamic API params.
     Modified file(s):
        libAACdec/src/aacdecoder_lib.cpp

   - Fix to do a fail-safe initialization of IMDCT for all channels even with
     corrupt streams.
     Modified file(s):
        libAACdec/src/aacdecoder.cpp

   - HCR decoder fix (remove warnings).
     Modified file(s):
        libAACdec/src/block.cpp

   - Fix border calculation in SBR decoder's LPP transposer patch determination.
     Modified file(s):
        libSBRdec/src/env_dec.cpp
        libSBRdec/src/sbrdecoder.cpp
        libSBRdec/src/lpp_tran.cpp

Bug 9428126

Change-Id: Ib415b702b88a7ec8e9a55789d79cafb39296d26b
Decoder parse ASC

* AAC-Decoder

   - Add support for explicit backward compatible signaling via ASC extension.

Bug 9428126

Change-Id: I0cb8226da07e3684bbb7eb95d10b6040973aa0f6
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
Encoder downsampled SBR

* AAC-Encoder

   - Introduce optional AACENC_SBR_RATIO encoder API parameter to configure
     dualrate or downsampled SBR explicitely. ELD makes use of downsampled SBR
     in default configuration.
     Modified file(s):
        documentation\aacEncoder.pdf
        libAACenc\include\aacenc_lib.h
        libAACenc\src\aacenc.h
        libAACenc\src\aacenc_lib.cpp

* SBR-Encoder

   - Implement downsampled SBR feature.
   - Revise sbr tuning parameter selection.
     Modified file(s):
        libSBRenc\include\sbr_encoder.h
        libSBRenc\src\bit_sbr.h
        libSBRenc\src\env_est.cpp
        libSBRenc\src\mh_det.cpp
        libSBRenc\src\nf_est.cpp
        libSBRenc\src\ps_main.cpp
        libSBRenc\src\sbr.h
        libSBRenc\src\sbr_def.h
        libSBRenc\src\sbr_encoder.cpp
        libSBRenc\src\sbr_rom.cpp
        libSBRenc\src\sbr_rom.h
        libSBRenc\src\sbrenc_freq_sca.cpp
        libSBRenc\src\sbrenc_freq_sca.h
        libSBRenc\src\ton_corr.cpp

Bug 9428126

Change-Id: I731720a10829272acaaf70b84525df00a09ff3d2
Encoder explicit signaling

* AAC-Encoder

   - Revise explicit signaling method which is required for downsampled SBR.
     The parameter is optional and default configuration is implicit signaling
     for dualrate SBR as before. In case of downsampled SBR and HE-AAC explicit
     signaling is configured as default.
     Modified file(s):
        documentation\aacEncoder.pdf
        libAACenc\include\aacenc_lib.h
        libAACenc\src\aacenc_lib.cpp
        libMpegTPEnc\src\tpenc_asc.cpp
        libMpegTPEnc\src\version
        libSYS\include\FDK_audio.h
        libSYS\src\genericStds.cpp

Bug 9428126

Change-Id: I35138140346f17384d109ee5829be9ea5bab80fc