Olivier Smeesters
A DTMF sequence editor and player for HAM radio equipment command & control.
SoundWaveGenerator/WaveCombo.cpp@0:1324e7d9d471, 2011-03-07 (annotated)
- Committer:
- osmeest
- Date:
- Mon Mar 07 22:51:19 2011 +0000
- Revision:
- 0:1324e7d9d471
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| osmeest | 0:1324e7d9d471 | 1 | #include "snd_wave_generator/WaveCombo.h" |
| osmeest | 0:1324e7d9d471 | 2 | |
| osmeest | 0:1324e7d9d471 | 3 | #include <algorithm> |
| osmeest | 0:1324e7d9d471 | 4 | #include <functional> |
| osmeest | 0:1324e7d9d471 | 5 | #include <numeric> |
| osmeest | 0:1324e7d9d471 | 6 | |
| osmeest | 0:1324e7d9d471 | 7 | namespace snd_wave_generator { |
| osmeest | 0:1324e7d9d471 | 8 | |
| osmeest | 0:1324e7d9d471 | 9 | WaveCombo & WaveCombo::add(Wave *wave) { |
| osmeest | 0:1324e7d9d471 | 10 | if (wave) { |
| osmeest | 0:1324e7d9d471 | 11 | this->waves.push_back(wave); |
| osmeest | 0:1324e7d9d471 | 12 | this->numWaves = this->waves.size(); |
| osmeest | 0:1324e7d9d471 | 13 | } |
| osmeest | 0:1324e7d9d471 | 14 | |
| osmeest | 0:1324e7d9d471 | 15 | return *this; |
| osmeest | 0:1324e7d9d471 | 16 | } |
| osmeest | 0:1324e7d9d471 | 17 | |
| osmeest | 0:1324e7d9d471 | 18 | void WaveCombo::prepare(std::size_t sampleRate) |
| osmeest | 0:1324e7d9d471 | 19 | { |
| osmeest | 0:1324e7d9d471 | 20 | std::for_each(this->waves.begin(), this->waves.end(), |
| osmeest | 0:1324e7d9d471 | 21 | std::bind2nd(std::mem_fun(&Wave::prepare), sampleRate)); |
| osmeest | 0:1324e7d9d471 | 22 | } |
| osmeest | 0:1324e7d9d471 | 23 | |
| osmeest | 0:1324e7d9d471 | 24 | struct AccumulateWaveValueAt { |
| osmeest | 0:1324e7d9d471 | 25 | AccumulateWaveValueAt(std::size_t pos) : pos(pos) { } |
| osmeest | 0:1324e7d9d471 | 26 | float operator()(float acc, const Wave *wave) const { |
| osmeest | 0:1324e7d9d471 | 27 | return acc + wave->read(this->pos); |
| osmeest | 0:1324e7d9d471 | 28 | } |
| osmeest | 0:1324e7d9d471 | 29 | |
| osmeest | 0:1324e7d9d471 | 30 | std::size_t pos; |
| osmeest | 0:1324e7d9d471 | 31 | }; |
| osmeest | 0:1324e7d9d471 | 32 | |
| osmeest | 0:1324e7d9d471 | 33 | float WaveCombo::read(std::size_t pos) const { |
| osmeest | 0:1324e7d9d471 | 34 | float v = std::accumulate(this->waves.begin(), this->waves.end(), 0.0f, |
| osmeest | 0:1324e7d9d471 | 35 | AccumulateWaveValueAt(pos)); |
| osmeest | 0:1324e7d9d471 | 36 | |
| osmeest | 0:1324e7d9d471 | 37 | return v / this->numWaves; |
| osmeest | 0:1324e7d9d471 | 38 | } |
| osmeest | 0:1324e7d9d471 | 39 | |
| osmeest | 0:1324e7d9d471 | 40 | } // snd_wave_generator |