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| author | Daniil Cherednik <dan.cherednik@gmail.com> | 2024-11-30 13:32:34 +0100 |
|---|---|---|
| committer | Daniil Cherednik <dan.cherednik@gmail.com> | 2024-12-01 22:28:26 +0100 |
| commit | 2ca3d7fb3cfdc0b311bb20426d53782910dee64e (patch) | |
| tree | 3db4ea83192bf999e0afb5039e9d1441069a259b /src/atrac3denc.h | |
| parent | 4be2e387a494b1c02d2ca0747dd64b6ba8980d21 (diff) | |
| download | atracdenc-2ca3d7fb3cfdc0b311bb20426d53782910dee64e.tar.gz | |
Tiny quality improvements for ATRAC3 compatible mode:
* Use adaptive ATH, but efficient is limited due to qmf aliasing.
* Use loudness instead of energy to split M/S frame size.
Diffstat (limited to 'src/atrac3denc.h')
| -rw-r--r-- | src/atrac3denc.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/atrac3denc.h b/src/atrac3denc.h index 1aea07e..50f2df0 100644 --- a/src/atrac3denc.h +++ b/src/atrac3denc.h @@ -82,11 +82,13 @@ protected: class TAtrac3Encoder : public IProcessor<TFloat>, public TAtrac3MDCT { TCompressedOutputPtr Oma; const NAtrac3::TAtrac3EncoderSettings Params; + const std::vector<float> LoudnessCurve; TDelayBuffer<TFloat, 8, 256> PcmBuffer; //8 = 2 channels * 4 bands TFloat PrevPeak[2][4]; //2 channel, 4 band - peak level (after windowing), used to check overflow during scalling Atrac3AnalysisFilterBank<TFloat> AnalysisFilterBank[2]; + TScaler<TAtrac3Data> Scaler; std::vector<NAtrac3::TAtrac3BitStreamWriter::TSingleChannelElement> SingleChannelElements; public: @@ -100,6 +102,8 @@ public: }; private: std::vector<std::vector<TTransientParam>> TransientParamsHistory; + static constexpr float LoudFactor = 0.006; + float Loudness = LoudFactor; #ifdef ATRAC_UT_PUBLIC public: #endif |