| 65 | |
| 66 | |
| 67 | bool AmplifierEffect::processAudioBuffer( sampleFrame* buf, const fpp_t frames ) |
| 68 | { |
| 69 | if( !isEnabled() || !isRunning () ) |
| 70 | { |
| 71 | return( false ); |
| 72 | } |
| 73 | |
| 74 | double outSum = 0.0; |
| 75 | const float d = dryLevel(); |
| 76 | const float w = wetLevel(); |
| 77 | |
| 78 | const ValueBuffer * volBuf = m_ampControls.m_volumeModel.valueBuffer(); |
| 79 | const ValueBuffer * panBuf = m_ampControls.m_panModel.valueBuffer(); |
| 80 | const ValueBuffer * leftBuf = m_ampControls.m_leftModel.valueBuffer(); |
| 81 | const ValueBuffer * rightBuf = m_ampControls.m_rightModel.valueBuffer(); |
| 82 | |
| 83 | for( fpp_t f = 0; f < frames; ++f ) |
| 84 | { |
| 85 | // qDebug( "offset %d, value %f", f, m_ampControls.m_volumeModel.value( f ) ); |
| 86 | |
| 87 | sample_t s[2] = { buf[f][0], buf[f][1] }; |
| 88 | |
| 89 | // vol knob |
| 90 | if( volBuf ) |
| 91 | { |
| 92 | s[0] *= volBuf->value( f ) * 0.01f; |
| 93 | s[1] *= volBuf->value( f ) * 0.01f; |
| 94 | } |
| 95 | else |
| 96 | { |
| 97 | s[0] *= m_ampControls.m_volumeModel.value() * 0.01f; |
| 98 | s[1] *= m_ampControls.m_volumeModel.value() * 0.01f; |
| 99 | } |
| 100 | |
| 101 | // convert pan values to left/right values |
| 102 | const float pan = panBuf |
| 103 | ? panBuf->value( f ) |
| 104 | : m_ampControls.m_panModel.value(); |
| 105 | const float left1 = pan <= 0 |
| 106 | ? 1.0 |
| 107 | : 1.0 - pan * 0.01f; |
| 108 | const float right1 = pan >= 0 |
| 109 | ? 1.0 |
| 110 | : 1.0 + pan * 0.01f; |
| 111 | |
| 112 | // second stage amplification |
| 113 | const float left2 = leftBuf |
| 114 | ? leftBuf->value( f ) |
| 115 | : m_ampControls.m_leftModel.value(); |
| 116 | const float right2 = rightBuf |
| 117 | ? rightBuf->value( f ) |
| 118 | : m_ampControls.m_rightModel.value(); |
| 119 | |
| 120 | s[0] *= left1 * left2 * 0.01; |
| 121 | s[1] *= right1 * right2 * 0.01; |
| 122 | |
| 123 | buf[f][0] = d * buf[f][0] + w * s[0]; |
| 124 | buf[f][1] = d * buf[f][1] + w * s[1]; |