* AAC-Encoder

   - Introduce ELD auto configurator to get predefined configuration at given
     bitrate and sampling rate. The configurator selects SBR on/off and if SBR
     enabled distinguishes between dualrate and downsampled SBR. In default
     configuration the ELD auto configurator is enabled.
     Modified file(s):
        libAACenc\include\aacenc_lib.h
        libAACenc\src\aacenc_lib.cpp

Bug 9428126

Change-Id: I01acc9c37e57c4154b3a818d496d538b7f8b227d

* 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

* 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

* 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

* AAC-Decoder

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

Bug 9428126

Change-Id: I0cb8226da07e3684bbb7eb95d10b6040973aa0f6

* 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

* 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

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

Bug 9428126

Change-Id: I1e8b801dfc0e6b1706421342d4985512e83f0dbe

Add missing support for downsampled SBR in libFDK

Bug 9428126

Change-Id: Idb732f8d31a115d36dd4b22916599db7fab98cae

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

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

Bug 9428126

Change-Id: I18a77cd1a178fff7531b490779a29a0df7d993af

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

Bug 9428126

Change-Id: Ic287b86f3229022740f2317ea74aabe612de5e6b

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

* 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

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

Bug 9428126

Change-Id: I490b96d4ee472246b01483202b0bb4f1e9c2a5d7

Change-Id: I12d284477f07349368e714ba52cbb2a47b024554
(cherry picked from commit a889574e60a02bbc647d3b078d2727cb48d82e5a)

* commit '0d439d3d':
  Remove a bionic workaround.

(Requires corresponding bionic patch 3975cec694a0c9b42e3f7e671fcd678da92836c3.)

(cherry-pick of 1d24ddc6.)

Change-Id: I7105b17c285ff24fb48be23cf2067aef37f36d45

(Requires corresponding bionic patch 3975cec694a0c9b42e3f7e671fcd678da92836c3.)

Change-Id: Ief968db33e2f9e1957510bbd59f25faa6828d678

From Fraunhofer:
* AAC Decoder

   - Stick to the written MPEG standard instead of the MPEG reference software
     in terms of reference level normalization. Always set the program reference
     level equal to the target level. This disables level normalization using a
     default level for streams without embedded metadata.
     Modified file(s):
        libAACdec\src\aacdec_drc.cpp

   - Fix downmix channel assignment when using a WAV output channel ordering.
     Modified file(s):
        libPCMutils\src\pcmutils_lib.cpp

   - Retain signal accuracy and prevent LSB alteration when no level correction
     needs to be done.
     Modified file(s):
        libAACdec\src\aacdec_drc.h
        libAACdec\src\aacdec_drc.cpp
        libSBRdec\src\sbrdecoder.cpp
        libSBRdec\src\sbr_dec.cpp
        libSBRdec\src\sbrdec_drc.cpp

   - Align metadata processing with reference implementation.
     Modified file(s):
        libAACdec\src\aacdec_drc.h
        libAACdec\src\aacdecoder.cpp

* AAC-Encoder

   - Prevent potential overflow in energy calculation after TNS processing.
     Modified file(s):
       libAACenc\src\band_nrg.cpp

   - Added saturation for number of relevant lines which are used in pe
     calculation.
     Modified file(s):
       libAACenc\src\line_pe.cpp

   - Removed obsolete files.
     Deleded file(s):
       libAACenc\src\tns_param.h
       libAACenc\src\tns_param.cpp

* FDK-Library

   - Added x86 Count Leading Zeros intrinsic.
     Modified file(s):
        libFDK\include\clz.h
     Added file(s):
        libFDK\include\x86\clz_x86.h

   - Fixed compilation for MIPS GCC-4.4 and higher.
     Modified file(s):
        libFDK\include\mips\cplx_mul.h
        libFDK\include\mips\fixmul_mips.h

Change-Id: I4be65f07f88d412224c7fddc3f054e8f451176cc

Addresses bug 7140347.

When flushing the decoder, you need to make sure to zero out any
lingering spectral coefficients as well as zero out the overlap buffer
state after decoding the final access unit.  Zeroing out the spec
coefficients *before* you decode the last block, however, seems like a
mistake.  If the final block contains any useful information for the
stream, then you end up outputting the overlap portion of the second
to last decoded block combined with zeros.  Because of the shape of
the second to last block's windows, this results in what appears to be
a fade out, but actually is a zero'ed out final block.
Signed-off-by: John Grossman <johngro@google.com>
Change-Id: I0fab9ee1a5899811d5519a91dc05631e9bf4963c

- MIPS still needs the work-around

Change-Id: If68b2028bd2779ada79020bb333ec8817abe9429

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

aac project forces the system not to include sys/types.h by defining
_SYS_TYPES_H_. This is a workaround for broken android toolchain.

This is no longer needed in latest android version and can be safely
removed. This will also lead to more errors if changes in bionic
headers are needed.

Change-Id: Icb76c207d6b47e811eacff9f9403177629bfb451
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>

Shifting by more than (or equal to) the variable length is
undefined in C.

This caused the quantized spectrum values to go out of range,
triggering asserts later.

Change-Id: If81b6c8caa7b9c75941ad9d280b686d2069c968c

Change-Id: I47509c20ee32f04ce42105563d2d4013910da531

Mingw32 doesn't define the __int64 types.

Change-Id: Ia45add37be1bf85abde664fd6e382334a6bb4498

Change-Id: If584e579464f28b97d50e51fc76ba654a5536c54