atracdenc/test, branch fix_input_file_path

Clean up UTF-8 path handling

2026-05-03T18:37:20Z

Reuse the shared UTF-8 path helper in Media Foundation, normalize compressed output open errors, cover AEA encode/decode paths, and expand integration tests for ATRAC1 and decode filenames.

Fix UTF-8 input and output paths

2026-05-03T18:20:31Z

Report libsndfile open failures before sample-rate validation, use UTF-16 Windows opens for PCM and compressed containers, and add integration tests for missing input plus UTF-8 input/output filenames.

Add MSYS2 build support (#70)

2026-05-03T12:41:21Z

* Add MSYS2 build support Add a selectable PCM I/O backend so MSVC builds can keep Media Foundation while MSYS2/MinGW builds use libsndfile. Teach the libsndfile finder about MINGW_PREFIX and add a Windows MSYS2 CI job that builds the libsndfile backend. Fix and enable tests for MSYS2 builds

atrac3: reimplement tonal encoding. Use flatness-based tonal extraction

2026-04-19T22:27:45Z

- 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.

Add CalcCurve and TSpectralUpsampler for transient detection

2026-03-05T22:44:12Z

CalcCurve (transient_detector.cpp/h): - Recursive divide-and-conquer FindTransients scans the gain vector for monotonic 3-subframe windows (rising or falling); kMinScore=2.0 filters out oscillations smaller than a factor of 2 (no-op at Level 4). - RelationToIdx maps an amplitude ratio to an ATRAC3 gain Level index. - TCurveBuilderCtx carries LastLevel across frames; CalcCurve prepends it as a virtual boundary element to detect Location=0 attacks. - budget=8 matches ATRAC3 SubbandInfo::MaxGainPointsNum. TSpectralUpsampler (transient_spectral_upsampler.cpp/h): - Applies a Planck-taper window (ε=0.15) to a 512-sample context window, forward-FFTs, applies a 3-bin raised-cosine HPF, zero-pads to 4096 bins, and inverse-FFTs to give an 8× upsampled output. - Returns highFreqRatio = Σ|X[k]·H[k]|²/Σ|X[k]|²; callers skip CalcCurve when this is below kHighFreqThreshold=0.05, preventing false transients from Planck noise-floor variation in sub-cutoff frames. Tests: - gain_processor_ut: upsampled-path blocks added to all FreqDomain tests; CalcCurve negative tests (NegativeTests suite). - transient_spectral_upsampler_ut: OutputSize, DCIsRemovedByLowCutFilter, HighFreqSinePreservesRMS (parametrised), ChirpNoTransient (0→5510 Hz sweep at 689 Hz low-cut, Len1024/16384/262144). Co-Authored-By: Claude Sonnet 4.6

Add TGainProcessor and frequency-domain gain modulation unit tests

2026-02-23T21:15:20Z

gain_processor_ut.cpp covers three test suites: TGainProcessor_Modulate (5 tests): - Empty gain returns null op - Single-point constant/transition/remainder regions - Two-point and three-point envelopes TGainProcessor_Demodulate (5 tests): - Empty gain returns null op - Single-point constant/transition/remainder regions - Two-point envelope TGainProcessor_Mirror (6 tests): - Round-trip Modulate->Demodulate algebraic identity - Constant, transition, remainder, and asymmetric-scale cases TGainProcessor_FreqDomain (6 tests): Each test builds a 3-frame signal, runs MDCT with Modulate, checks HF energy reduction vs unmodulated, and verifies perfect signal reconstruction via MDCT(Modulate)->MIDCT(Demodulate) with 1e-5 tolerance. Test signals and gain envelopes (mirroring atrac3denc_ut.cpp reference tests): | Test name | Frame 1 gain | Frame 2 comp gain | |-------------------------------------------------------|-----------------------|-------------------| | GainModulation_ReducesSpectralEnergy | {{7,0}} | none | | GainModulation_ReducesSpectralEnergy_TransientInFrame | {{4,8},{7,31}} | {{1,1}} | | GainModulation_ReducesSpectralEnergy_AttackAndRelease | {{7,4},{4,12},{7,31}} | {{1,1}} | | GainModulation_ReducesSpectralEnergy_DcSignal | {{7,1}} | {{1,1}} | | GainModulation_ReducesSpectralEnergy_DcSignal2 | {{7,1}} | {{1,0}} | | GainModulation_ReducesSpectralEnergy_2PointsWithoutScaleDc2 | {{4,0},{1,31}} | none | Round-trip Demodulate mapping (siCur -> siNext at frame 2 MIDCT): | Test name | siCur | siNext | |-------------------------------------------------------|-----------------------|---------| | GainModulation_ReducesSpectralEnergy | {{7,0}} | empty | | GainModulation_ReducesSpectralEnergy_TransientInFrame | {{4,8},{7,31}} | {{1,1}} | | GainModulation_ReducesSpectralEnergy_AttackAndRelease | {{7,4},{4,12},{7,31}} | {{1,1}} | | GainModulation_ReducesSpectralEnergy_DcSignal | {{7,1}} | {{1,1}} | | GainModulation_ReducesSpectralEnergy_DcSignal2 | {{7,1}} | {{1,0}} | | GainModulation_ReducesSpectralEnergy_2PointsWithoutScaleDc2 | {{4,0},{1,31}} | empty | Co-Authored-By: Claude Sonnet 4.6

Disable asan for stable branch. Remove ghasendtool.

2025-07-20T12:01:08Z

Bump c++ version to c++17

2025-06-22T12:37:24Z

Merge branch 'at3plus-dev'

2025-05-31T20:39:38Z

It looks like we are able to encode ATRAC3PLUS compatible bitstream so we can merge at3p development branch in to the main branch. Current limitation for AT3P mode: - Only 352 Kbps (proper bit allocation and some psychoacoustic must be implemented) - GHA sometime works with error (but huge bitrate hide it) - No VLC, VQ, delta encoding - No noise substitution - No gain control - No window shape switching

Compatibility with modern cmake

2025-04-26T14:57:15Z