atracdenc/src/atrac/atrac_psy_common.cpp, branch fix_input_file_pathOpenSource ATRAC1 ATRAC3 Encoderhttps://code.mastervirt.ru/atracdenc/atom?h=fix_input_file_path2026-04-19T22:27:45Zatrac3: reimplement tonal encoding. Use flatness-based tonal extraction2026-04-19T22:27:45ZDaniil Cherednikdan.cherednik@gmail.com2026-04-18T14:51:23Zurn:sha1:e784b79cfef682059cf5cc8cf9bed635e714c439
- Add shared CalcSpectralFlatnessPerBfu helper in atrac_psy_common
with BFU-table mapping.
- Implement ATRAC3 tonal extraction: compute MDCT energy, estimate
per-BFU flatness, extract up to 5-bin strongest tonal run in
low-flatness BFUs, and zero extracted bins in residual.
- Map extracted tonal bins into TTonalBlocks and integrate them into
bitstream coding.
- Update ATRAC3 bit allocation - reduce residual bits for BFUs with tonal
blocks, and increase tonal quantizer selection.
- Restore --notonal CLI option in main.cpp for A/B comparison.
Fix energy calculation for quantization units2025-09-05T20:08:03ZDaniil Cherednikdan.cherednik@gmail.com2025-08-23T19:59:46Zurn:sha1:65b8ae4337ad68ae0c10f609a11e77d96e5ad8e2[refactoring] Get rid of TFloat parameter. Use float.2024-12-21T15:30:07ZDaniil Cherednikdan.cherednik@gmail.com2024-12-20T21:31:20Zurn:sha1:74d6e04c21bddd435bd74c34dbe027b883772a76[refactoring] Get rid of inheritance from data.2024-12-12T22:52:19ZDaniil Cherednikdan.cherednik@gmail.com2024-12-12T22:26:24Zurn:sha1:39986e653def9d1130235c1cd6a38c3251bb6d79Tiny quality improvements for ATRAC3 compatible mode:2024-12-01T21:28:26ZDaniil Cherednikdan.cherednik@gmail.com2024-11-30T12:32:34Zurn:sha1:2ca3d7fb3cfdc0b311bb20426d53782910dee64e
* Use adaptive ATH, but efficient is limited due to qmf aliasing.
* Use loudness instead of energy to split M/S frame size.
Attempt to use adaptive ATH for ATRAC12024-10-10T22:07:48ZDaniil Cherednikdan.cherednik@gmail.com2024-10-10T22:07:48Zurn:sha1:57ba306db046601b96b5a1943e63574a37c5e96cBring some ATH related code from musepack project2024-08-02T22:52:04ZDaniil Cherednikdan.cherednik@gmail.com2024-08-02T22:52:04Zurn:sha1:a18796c67f26df138601a0e6061daeed03808a29
Motivations:
- We need some psychoacoustic model to apply it
in the AT3P during GHA. The idea is try to use ATH
along with some tonality measurement to determine
whether GHA gives profit or just penalty due to
non effitient GHA bit encoding.
- We can try to improve AT1 and AT3 quality applying ATH
Support for MS Windows platform2019-05-14T22:14:42ZDaniil Cherednikdan.cherednik@gmail.com2019-05-14T22:14:42Zurn:sha1:ed9629395ce9696164c1d617d573a47982e82169
- VS build (2017 tested)
- Media Foundation Framework support to read/write pcm data (instead of
libsndfile)
Set LGPL v2.1 license2017-02-12T13:14:56ZDaniil Cherednikdan.cherednik@gmail.com2017-02-12T13:14:56Zurn:sha1:3740b709a39e4a1eca7a5fbd598e8554944ce0e7Dirty implementation of atrac3 encoder:2016-09-02T18:21:28ZDaniil Cherednikdan.cherednik@gmail.com2016-03-13T06:49:33Zurn:sha1:cfaa2cd39b7256a868a4f5cd83aac207df6bd1b3
- no JS mode
- constant quantiser for tonal components
- gain controll implemented but produces some artifacts with real signals.
- etc...