aboutsummaryrefslogtreecommitdiffstats
path: root/documentation
Commit message (Collapse)AuthorAgeFilesLines
* AAC/SBR decoder improvements and bugfixesJean-Michel Trivi2016-04-081-0/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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
* SBR/AAC encoder updates, code clean upJean-Michel Trivi2016-04-041-0/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * SBR-Encoder - Prevent noise level overflow in noise floor detection. - Saturate threshold calculation in transient detection. Modified file(s): libSBRenc/src/nf_est.cpp libSBRenc/src/sbr_encoder.cpp libSBRenc/src/tran_det.cpp * AAC-Encoder - Expand input data range of GetInvInt() function. There was an encoder assert observed in non-default bitrate configuration. Modified file(s): libAACenc/src/aacenc_lib.cpp libAACenc/src/intensity.cpp libFDK/include/fixpoint_math.h libFDK/src/FDK_core.cpp libFDK/src/FDK_tools_rom.cpp - Make sure that the encoder is stable with regard to very low audio bandwidth confguration parameter value. - Fix lowdelay blending for low audio bandwidth. Modified file(s): libAACenc/src/aacenc.cpp libAACenc/src/aacenc_lib.cpp libAACenc/src/adj_thr.cpp libAACenc/src/psy_configuration.cpp libAACenc/src/psy_main.cpp - Disable pseudo surround flag in case metadata matrix mixdown index is present in program config element. Modified file(s): libAACenc/src/aacenc_lib.cpp - Enable variable bitrate mode in encoder api. - Add AACENC_PEAK_BITRATE parameter to encoder api. - Add AACENC_AUDIOMUXVER parameter to encoder api. Modified file(s): libAACenc/include/aacenc_lib.h libAACenc/src/aacenc.cpp libAACenc/src/aacenc.h libAACenc/src/aacenc_lib.cpp libAACenc/src/qc_main.cpp libMpegTPEnc/src/tpenc_latm.cpp libMpegTPEnc/src/version * FDK-Sources - Code clean up. Remove unneeded pseudo audio object types and transport types. Modified file(s): libAACdec/src/aacdecoder.cpp libAACdec/src/aacdecoder_lib.cpp libAACenc/include/aacenc_lib.h libAACenc/src/aacenc.cpp libAACenc/src/aacenc_lib.cpp libFDK/src/FDK_tools_rom.cpp libMpegTPDec/src/tpdec_lib.cpp libMpegTPDec/src/version libMpegTPEnc/src/tpenc_latm.cpp libMpegTPEnc/src/version libSBRdec/src/sbrdecoder.cpp libSBRenc/src/sbr_encoder.cpp libSYS/include/FDK_audio.h libSYS/src/genericStds.cpp Change-Id: I807a53cb7f48c9ee7563cb8da1d0c52221576ca6
* AAC Decoder: introduce time domain limiterJean-Michel Trivi2014-03-311-2065/+2162
| | | | | | | | | | | | | Introduce time domain limiter. The module is per default enabled for all AAC-LC and HE-AAC v1/2 streams. For all ER-AAC-LD and ER-AAC-ELD streams the limiter is disabled per default. The feature can be en- or disabled via dynamic API parameter. Note that the limiter introduces an additional output delay which depends on the module parameters and the streams sampling rate. Bug 9428126 Change-Id: I299a072340b33e2c324facbd347a72c8de3d380e
* AAC Decoder: support 6.1/7.1 decoded as 5.1Jean-Michel Trivi2013-12-301-5711/+3932
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Add 6.1 and 7.1 channel support including downmixer. Per default the decoder creates a 5.1 channel output for all streams with more than six encoded channels. Modified file(s): libPCMutils/include/pcmutils_lib.h libPCMutils/src/pcmutils_lib.cpp libAACdec/include/aacdecoder_lib.h libAACdec/src/aac_rom.h libAACdec/src/aacdecoder.cpp libAACdec/src/aac_ram.cpp libAACdec/src/aacdec_drc.cpp libAACdec/src/aacdecoder_lib.cpp libAACdec/src/aac_rom.cpp libAACdec/src/aacdecoder.h libSBRdec/include/sbrdecoder.h libSBRdec/src/sbrdec_drc.h libSBRdec/src/sbrdecoder.cpp libSBRdec/src/sbr_ram.cpp libSBRdec/src/sbr_ram.h libMpegTPDec/include/tp_data.h libMpegTPDec/include/tpdec_lib.h libMpegTPDec/src/version libMpegTPDec/src/tpdec_asc.cpp libMpegTPEnc/include/tp_data.h libMpegTPEnc/src/version libSYS/include/FDK_audio.h libSYS/src/genericStds.cpp - Fix error concealment modules fade-out/in mechanism. Modified file(s): libAACdec/src/conceal.cpp Bug 9428126 Change-Id: I3230bd2072314b730911cd7ec1740e290cb1d254
* Encoder explicit signalingJean-Michel Trivi2013-09-031-3562/+3650
| | | | | | | | | | | | | | | | | | | | | * 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
* Encoder downsampled SBRJean-Michel Trivi2013-08-291-5118/+4398
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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
* Bug 7170947 Update AAC codecJean-Michel Trivi2012-10-022-1221/+1225
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* Bug fixes in AAC decoder, AAC encoder, FDK libraryJean-Michel Trivi2012-09-092-4131/+4055
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* Snapshot 2bda038c163298531d47394bc2c09e1409c5d0dbThe Android Open Source Project2012-07-112-0/+20911
Change-Id: If584e579464f28b97d50e51fc76ba654a5536c54