bool LV2Effect::ProcessStereo(int count, WaveTrack *left, WaveTrack *right, sampleCount lstart, sampleCount rstart, sampleCount len) { /* Allocate buffers */ if (mBlockSize == 0) { mBlockSize = left->GetMaxBlockSize() * 2; fInBuffer = new float *[mAudioInputs.GetCount()]; for (size_t i = 0; i < mAudioInputs.GetCount(); i++) { fInBuffer[i] = new float[mBlockSize]; } fOutBuffer = new float *[mAudioOutputs.GetCount()]; for (size_t i = 0; i < mAudioOutputs.GetCount(); i++) { fOutBuffer[i] = new float[mBlockSize]; } } /* Instantiate the plugin */ LilvInstance *handle = lilv_plugin_instantiate(mData, left->GetRate(), gLV2Features); if (!handle) { wxMessageBox(wxString::Format(_("Unable to load plug-in %s"), pluginName.c_str())); return false; } /* Write the Note On to the MIDI event buffer and connect it */ LV2_Event_Buffer *midiBuffer = NULL; int noteOffTime; if (mMidiInput) { midiBuffer = lv2_event_buffer_new(40, 2); LV2_Event_Iterator iter; lv2_event_begin(&iter, midiBuffer); uint8_t noteOn[] = { 0x90, mNoteKey, mNoteVelocity }; lv2_event_write(&iter, 0, 0, 1, 3, noteOn); noteOffTime = mNoteLength * left->GetRate(); if (noteOffTime < len && noteOffTime < mBlockSize) { uint8_t noteOff[] = { 0x80, mNoteKey, 64 }; lv2_event_write(&iter, noteOffTime, 0, 1, 3, noteOff); } lilv_instance_connect_port(handle, mMidiInput->mIndex, midiBuffer); } for (size_t p = 0; p < mAudioInputs.GetCount(); p++) { lilv_instance_connect_port(handle, mAudioInputs[p].mIndex, fInBuffer[p]); } for (size_t p = 0; p < mAudioOutputs.GetCount(); p++) { lilv_instance_connect_port(handle, mAudioOutputs[p].mIndex, fOutBuffer[p]); } for (size_t p = 0; p < mControlInputs.GetCount(); p++) { lilv_instance_connect_port(handle, mControlInputs[p].mIndex, &mControlInputs[p].mControlBuffer); } for (size_t p = 0; p < mControlOutputs.GetCount(); p++) { lilv_instance_connect_port(handle, mControlOutputs[p].mIndex, &mControlOutputs[p].mControlBuffer); } float latency = 0.0; if (mLatencyPortIndex >= 0) { lilv_instance_connect_port(handle, mLatencyPortIndex, &latency); } lilv_instance_activate(handle); // Actually perform the effect here sampleCount originalLen = len; sampleCount ls = lstart; sampleCount rs = rstart; sampleCount ols = ls; sampleCount ors = rs; bool noteOver = false; sampleCount delayed = 0; sampleCount delay = 0; bool cleared = false; while (len || delayed) { int block = mBlockSize; if (len) { if (block > len) { block = len; } if (left && mAudioInputs.GetCount() > 0) { left->Get((samplePtr)fInBuffer[0], floatSample, ls, block); } if (right && mAudioInputs.GetCount() > 1) { right->Get((samplePtr)fInBuffer[1], floatSample, rs, block); } } else if (delayed) { // At the end if we don't have enough left for a whole block if (block > delayed) { block = delayed; } // Clear the input buffer so that we only pass zeros to the effect. if (!cleared) { for (int i = 0; i < mBlockSize; i++) { fInBuffer[0][i] = 0.0; } if (right) { memcpy(fInBuffer[1], fOutBuffer[0], mBlockSize); } cleared = true; } } lilv_instance_run(handle, block); if (delayed == 0 && latency != 0) { delayed = delay = latency; } if (delay >= block) { delay -= block; } else if (delay > 0) { sampleCount oblock = block - delay; if (left && mAudioOutputs.GetCount() > 0) { left->Set((samplePtr)(fOutBuffer[0] + delay), floatSample, ols, oblock); } if (right && mAudioOutputs.GetCount() > 1) { right->Set((samplePtr)(fOutBuffer[1] + delay), floatSample, ors, oblock); } ols += oblock; ors += oblock; delay = 0; } else { if (left && mAudioOutputs.GetCount() > 0) { left->Set((samplePtr)fOutBuffer[0], floatSample, ols, block); } if (right && mAudioOutputs.GetCount() > 1) { right->Set((samplePtr)fOutBuffer[1], floatSample, ors, block); } ols += block; ors += block; } if (len) { len -= block; noteOffTime -= block; // Clear the event buffer and add the note off event if needed if (mMidiInput) { lv2_event_buffer_reset(midiBuffer, 1, (uint8_t *)midiBuffer + sizeof(LV2_Event_Buffer)); if (!noteOver && noteOffTime < len && noteOffTime < block) { LV2_Event_Iterator iter; lv2_event_begin(&iter, midiBuffer); uint8_t noteOff[] = { 0x80, mNoteKey, 64 }; lv2_event_write(&iter, noteOffTime, 0, 1, 3, noteOff); noteOver = true; } } } else if (delayed) { delayed -= block; } ls += block; rs += block; if (mAudioInputs.GetCount() > 1) { if (TrackGroupProgress(count, (ls-lstart)/(double)originalLen)) { return false; } } else { if (TrackProgress(count, (ls-lstart)/(double)originalLen)) { return false; } } } lilv_instance_deactivate(handle); lilv_instance_free(handle); return true; }
bool LV2Effect::ProcessStereo(int count, WaveTrack *left, WaveTrack *right, sampleCount lstart, sampleCount rstart, sampleCount len) { /* Allocate buffers */ if (mBlockSize == 0) { mBlockSize = left->GetMaxBlockSize() * 2; fInBuffer = new float *[mAudioInputs.size()]; unsigned long i; for (i = 0; i < mAudioInputs.size(); i++) fInBuffer[i] = new float[mBlockSize]; fOutBuffer = new float *[mAudioOutputs.size()]; for (i = 0; i < mAudioOutputs.size(); i++) fOutBuffer[i] = new float[mBlockSize]; } /* Instantiate the plugin */ SLV2Instance handle = slv2_plugin_instantiate(mData, left->GetRate(), gLV2Features); /* Write the Note On to the MIDI event buffer and connect it */ LV2_Event_Buffer* midiBuffer; int noteOffTime; if (mMidiInput) { midiBuffer = lv2_event_buffer_new(40, 2); LV2_Event_Iterator iter; lv2_event_begin(&iter, midiBuffer); uint8_t noteOn[] = { 0x90, mNoteKey, mNoteVelocity }; lv2_event_write(&iter, 0, 0, 1, 3, noteOn); noteOffTime = mNoteLength * left->GetRate(); if (noteOffTime < len && noteOffTime < mBlockSize) { uint8_t noteOff[] = { 0x80, mNoteKey, 64 }; lv2_event_write(&iter, noteOffTime, 0, 1, 3, noteOff); } slv2_instance_connect_port(handle, mMidiInput->mIndex, midiBuffer); } unsigned long p; for(p = 0; p < mAudioInputs.size(); p++) { slv2_instance_connect_port(handle, mAudioInputs[p].mIndex, fInBuffer[p]); } for(p = 0; p < mAudioOutputs.size(); p++) { slv2_instance_connect_port(handle, mAudioOutputs[p].mIndex, fOutBuffer[p]); } for (p = 0; p < mControlInputs.size(); p++) { slv2_instance_connect_port(handle, mControlInputs[p].mIndex, &mControlInputs[p].mControlBuffer); } for (p = 0; p < mControlOutputs.size(); p++) { slv2_instance_connect_port(handle, mControlOutputs[p].mIndex, &mControlOutputs[p].mControlBuffer); } slv2_instance_activate(handle); // Actually perform the effect here sampleCount originalLen = len; sampleCount ls = lstart; sampleCount rs = rstart; bool noteOver = false; while (len) { int block = mBlockSize; if (block > len) block = len; if (left && mAudioInputs.size() > 0) { left->Get((samplePtr)fInBuffer[0], floatSample, ls, block); } if (right && mAudioInputs.size() > 1) { right->Get((samplePtr)fInBuffer[1], floatSample, rs, block); } slv2_instance_run(handle, block); if (left && mAudioOutputs.size() > 0) { left->Set((samplePtr)fOutBuffer[0], floatSample, ls, block); } if (right && mAudioOutputs.size() > 1) { right->Set((samplePtr)fOutBuffer[1], floatSample, rs, block); } len -= block; noteOffTime -= block; ls += block; rs += block; // Clear the event buffer and add the note off event if needed if (mMidiInput) { lv2_event_buffer_reset(midiBuffer, 1, (uint8_t*)midiBuffer + sizeof(LV2_Event_Buffer)); if (!noteOver && noteOffTime < len && noteOffTime < block) { LV2_Event_Iterator iter; lv2_event_begin(&iter, midiBuffer); uint8_t noteOff[] = { 0x80, mNoteKey, 64 }; lv2_event_write(&iter, noteOffTime, 0, 1, 3, noteOff); noteOver = true; } } if (mAudioInputs.size() > 1) { if (TrackGroupProgress(count, (ls-lstart)/(double)originalLen)) return false; } else { if (TrackProgress(count, (ls-lstart)/(double)originalLen)) return false; } } slv2_instance_deactivate(handle); slv2_instance_free(handle); return true; }