atracdenc/src/main.cpp, branch at3p_riff

[AT3P] Add ATRAC3plus RIFF output

2026-05-12T19:57:17Z

Fix mono AT3 RIFF channel count. issues/67

2026-05-02T21:42:38Z

AT3 RIFF output always stores a two-channel ATRAC3 stream. Mono input is encoded as duplicated single channels or as joint stereo with an empty side channel.

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.

atrac3: add YAML gain control debug logging (--yaml-log)

2026-04-08T21:33:40Z

Inspired by edge264's YAML logging approach (FOSDEM 2026): emit every gain control decision as a self-contained YAML stream so any frame can be grep'd, analyzed with Python, or used to craft custom test curves. ./atracdenc -e atrac3 -i in.wav -o out.oma --yaml-log gain.yaml Each YAML document covers one frame (frame:/time: header) with channels and bands nested below. Per-band fields emitted in pipeline order: high_freq_ratio, overlap_ratio, dynamic_min_score, gain[], next_level pcm_qmf (256 raw QMF samples, non-modulated, non-windowed) curve_raw, rms_cur, rms_next_mod, point0_level, crossover curve_final, max_gain, ratio, level_boost, scale_boost, total_boost gain_boost (or skip: at each early-exit point) New files / changes: src/yaml_log.h - TYamlFmtGuard (stream format RAII), YamlWriteFloatSeq (vector + ptr/len overloads) src/atrac/at3/atrac3.h - YamlLog field in TAtrac3EncoderSettings src/atrac3denc.h - FrameNum counter + YamlLog pointer on TAtrac3Encoder src/atrac3denc.cpp - frame header in GetLambda, incremental YAML in CreateSubbandInfo at every decision point src/main.cpp - --yaml-log CLI flag Co-Authored-By: Claude Sonnet 4.6

Use common bit allocation engine for AT1 mode

2025-07-31T21:40:11Z

This commit also removes handling "bfuidxconst" option and mark it as deprecated. This option actually does not affect encoding speed significantly.

Move implementation details into corresponding dirs (#52)

2025-07-22T20:54:21Z

0.2 stable branch

2025-07-20T12:01:08Z

- ATH and some bit allocation tuning for ATRAC1 compatible encoding. - ATH, energy aware quanitization and tuning for ATRAC3 compatible encoding. - Noticeable improvements for LP4 mode (but still not perfect on some tracks for LP4 bitrate) - Initial implementation of ATRAC3PLUS compatible encoding.

Fix memory leak in case of unsupported input file.

2025-06-08T17:44:34Z

[AT3P] Add advanced option for GHA debug

2025-05-16T21:48:26Z

There are 3 flags: GHA_PASS_INPUT - allows to pass source signal in to the filter GHA_WRITE_TONAL - allows to write result of GHA into the bitstream GHA_WRITE_RESIUDAL - allows to process signal after the filter If all 3 flags set it denotes normal processing. If we want to see only result of sinusoid extraction (tonal component) we can set only GHA_WRITE_TONAL flag. If we want to see signal after extraction we need to set GHA_PASS_INPUT and GHA_WRITE_RESIUDAL.

Merge branch 'master' into at3plus-dev

2024-12-24T21:59:03Z