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Diffstat (limited to 'externals/oboe/src/flowgraph/RampLinear.h')
| -rw-r--r-- | externals/oboe/src/flowgraph/RampLinear.h | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/externals/oboe/src/flowgraph/RampLinear.h b/externals/oboe/src/flowgraph/RampLinear.h deleted file mode 100644 index 3839d6ef96..0000000000 --- a/externals/oboe/src/flowgraph/RampLinear.h +++ /dev/null @@ -1,96 +0,0 @@ -/* - * Copyright 2015 The Android Open Source Project - * - * 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. - */ - -#ifndef FLOWGRAPH_RAMP_LINEAR_H -#define FLOWGRAPH_RAMP_LINEAR_H - -#include <atomic> -#include <unistd.h> -#include <sys/types.h> - -#include "FlowGraphNode.h" - -namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph { - -/** - * When the target is modified then the output will ramp smoothly - * between the original and the new target value. - * This can be used to smooth out control values and reduce pops. - * - * The target may be updated while a ramp is in progress, which will trigger - * a new ramp from the current value. - */ -class RampLinear : public FlowGraphFilter { -public: - explicit RampLinear(int32_t channelCount); - - virtual ~RampLinear() = default; - - int32_t onProcess(int32_t numFrames) override; - - /** - * This is used for the next ramp. - * Calling this does not affect a ramp that is in progress. - */ - void setLengthInFrames(int32_t frames); - - int32_t getLengthInFrames() const { - return mLengthInFrames; - } - - /** - * This may be safely called by another thread. - * @param target - */ - void setTarget(float target); - - float getTarget() const { - return mTarget.load(); - } - - /** - * Force the nextSegment to start from this level. - * - * WARNING: this can cause a discontinuity if called while the ramp is being used. - * Only call this when setting the initial ramp. - * - * @param level - */ - void forceCurrent(float level) { - mLevelFrom = level; - mLevelTo = level; - } - - const char *getName() override { - return "RampLinear"; - } - -private: - - float interpolateCurrent(); - - std::atomic<float> mTarget; - - int32_t mLengthInFrames = 48000.0f / 100.0f ; // 10 msec at 48000 Hz; - int32_t mRemaining = 0; - float mScaler = 0.0f; - float mLevelFrom = 0.0f; - float mLevelTo = 0.0f; -}; - -} /* namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph */ - -#endif //FLOWGRAPH_RAMP_LINEAR_H |
