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Diffstat (limited to 'extern/audaspace/src/fx/Threshold.cpp')
| -rw-r--r-- | extern/audaspace/src/fx/Threshold.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/extern/audaspace/src/fx/Threshold.cpp b/extern/audaspace/src/fx/Threshold.cpp new file mode 100644 index 00000000000..03c4ae4c8a5 --- /dev/null +++ b/extern/audaspace/src/fx/Threshold.cpp @@ -0,0 +1,54 @@ +/******************************************************************************* + * Copyright 2009-2016 Jörg Müller + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + ******************************************************************************/ + +#include "fx/Threshold.h" +#include "fx/CallbackIIRFilterReader.h" + +AUD_NAMESPACE_BEGIN + +sample_t Threshold::thresholdFilter(CallbackIIRFilterReader* reader, float* threshold) +{ + float in = reader->x(0); + if(in >= *threshold) + return 1; + else if(in <= -*threshold) + return -1; + else + return 0; +} + +void Threshold::endThresholdFilter(float* threshold) +{ + delete threshold; +} + +Threshold::Threshold(std::shared_ptr<ISound> sound, float threshold) : + Effect(sound), + m_threshold(threshold) +{ +} + +float Threshold::getThreshold() const +{ + return m_threshold; +} + +std::shared_ptr<IReader> Threshold::createReader() +{ + return std::shared_ptr<IReader>(new CallbackIIRFilterReader(getReader(), 1, 0, doFilterIIR(thresholdFilter), endFilterIIR(endThresholdFilter), new float(m_threshold))); +} + +AUD_NAMESPACE_END |