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| author | Daniil Cherednik <dan.cherednik@gmail.com> | 2016-07-17 17:50:38 +0300 |
|---|---|---|
| committer | Daniil Cherednik <dan.cherednik@gmail.com> | 2016-07-17 20:40:57 +0300 |
| commit | 91a4ae90590356b513e5f882ff81a5ca9fda961d (patch) | |
| tree | 040d60afe3e63ed773ff26f4391964f7a36ee916 /src/gain_processor.h | |
| parent | 3999450de0b6098d3d41549a58c3ff23cc0a565d (diff) | |
| download | atracdenc-91a4ae90590356b513e5f882ff81a5ca9fda961d.tar.gz | |
Experimental implementation of gain control.
Diffstat (limited to 'src/gain_processor.h')
| -rw-r--r-- | src/gain_processor.h | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/src/gain_processor.h b/src/gain_processor.h index 04f2041..0fa9728 100644 --- a/src/gain_processor.h +++ b/src/gain_processor.h @@ -24,17 +24,21 @@ public: * so next transformation (mdct #3) gets modulated first part */ typedef std::function<void(TFloat* bufCur, TFloat* bufNext)> TGainModulator; - static TFloat GetGainInc(uint32_t levelIdxCur) { + static TFloat GetGainInc(uint32_t levelIdxCur) + { const int incPos = T::ExponentOffset - levelIdxCur + T::GainInterpolationPosShift; return T::GainInterpolation[incPos]; } - static TFloat GetGainInc(uint32_t levelIdxCur, uint32_t levelIdxNext) { + static TFloat GetGainInc(uint32_t levelIdxCur, uint32_t levelIdxNext) + { const int incPos = levelIdxNext - levelIdxCur + T::GainInterpolationPosShift; return T::GainInterpolation[incPos]; } - TGainDemodulator Demodulate(const std::vector<typename T::SubbandInfo::TGainPoint>& giNow, const std::vector<typename T::SubbandInfo::TGainPoint>& giNext) { + TGainDemodulator Demodulate(const std::vector<typename T::SubbandInfo::TGainPoint>& giNow, + const std::vector<typename T::SubbandInfo::TGainPoint>& giNext) + { return [=](TFloat* out, TFloat* cur, TFloat* prev) { uint32_t pos = 0; const TFloat scale = giNext.size() ? T::GainLevel[giNext[0].Level] : 1; @@ -43,7 +47,8 @@ public: const uint32_t levelPos = giNow[i].Level; assert(levelPos < sizeof(T::GainLevel)/sizeof(T::GainLevel[0])); TFloat level = T::GainLevel[levelPos]; - const int incPos = ((i + 1) < giNow.size() ? giNow[i + 1].Level : T::ExponentOffset) - giNow[i].Level + T::GainInterpolationPosShift; + const int incPos = ((i + 1) < giNow.size() ? giNow[i + 1].Level : T::ExponentOffset) + - giNow[i].Level + T::GainInterpolationPosShift; TFloat gainInc = T::GainInterpolation[incPos]; for (; pos < lastPos; pos++) { //std::cout << "pos: " << pos << " scale: " << scale << " level: " << level << std::endl; @@ -72,7 +77,8 @@ public: const uint32_t levelPos = giCur[i].Level; assert(levelPos < sizeof(T::GainLevel)/sizeof(T::GainLevel[0])); TFloat level = T::GainLevel[levelPos]; - const int incPos = ((i + 1) < giCur.size() ? giCur[i + 1].Level : T::ExponentOffset) - giCur[i].Level + T::GainInterpolationPosShift; + const int incPos = ((i + 1) < giCur.size() ? giCur[i + 1].Level : T::ExponentOffset) + - giCur[i].Level + T::GainInterpolationPosShift; TFloat gainInc = T::GainInterpolation[incPos]; for (; pos < lastPos; pos++) { //std::cout << "mod pos: " << pos << " scale: " << scale << " bufCur: " << bufCur[pos] << " level: " << level << " bufNext: " << bufNext[pos] << std::endl; |