110 lines
3.4 KiB
Text
110 lines
3.4 KiB
Text
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.hardware.audio.effect@2.0;
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import android.hardware.audio.common@2.0;
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import IEffect;
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interface IVisualizerEffect extends IEffect {
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enum CaptureSizeRange : int32_t {
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MAX = 1024, // maximum capture size in samples
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MIN = 128 // minimum capture size in samples
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};
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/*
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* Sets the number PCM samples in the capture.
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*/
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setCaptureSize(uint16_t captureSize) generates (Result retval);
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/*
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* Gets the number PCM samples in the capture.
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*/
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getCaptureSize() generates (Result retval, uint16_t captureSize);
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enum ScalingMode : int32_t {
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// Keep in sync with SCALING_MODE_... in
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// frameworks/base/media/java/android/media/audiofx/Visualizer.java
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NORMALIZED = 0,
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AS_PLAYED = 1
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};
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/*
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* Specifies the way the captured data is scaled.
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*/
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setScalingMode(ScalingMode scalingMode) generates (Result retval);
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/*
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* Retrieves the way the captured data is scaled.
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*/
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getScalingMode() generates (Result retval, ScalingMode scalingMode);
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/*
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* Informs the visualizer about the downstream latency.
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*/
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setLatency(uint32_t latencyMs) generates (Result retval);
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/*
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* Gets the downstream latency.
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*/
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getLatency() generates (Result retval, uint32_t latencyMs);
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enum MeasurementMode : int32_t {
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// Keep in sync with MEASUREMENT_MODE_... in
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// frameworks/base/media/java/android/media/audiofx/Visualizer.java
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NONE = 0x0,
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PEAK_RMS = 0x1
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};
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/*
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* Specifies which measurements are to be made.
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*/
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setMeasurementMode(MeasurementMode measurementMode)
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generates (Result retval);
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/*
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* Retrieves which measurements are to be made.
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*/
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getMeasurementMode() generates (
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Result retval, MeasurementMode measurementMode);
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/*
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* Retrieves the latest PCM snapshot captured by the visualizer engine. The
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* number of samples to capture is specified by 'setCaptureSize' parameter.
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*
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* @return retval operation completion status.
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* @return samples samples in 8 bit unsigned format (0 = 0x80)
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*/
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capture() generates (Result retval, vec<uint8_t> samples);
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struct Measurement {
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MeasurementMode mode; // discriminator
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union Values {
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struct PeakAndRms {
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int32_t peakMb; // millibels
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int32_t rmsMb; // millibels
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} peakAndRms;
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} value;
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};
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/*
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* Retrieves the lastest measurements. The measurements to be made
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* are specified by 'setMeasurementMode' parameter.
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*
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* @return retval operation completion status.
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* @return result measurement.
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*/
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measure() generates (Result retval, Measurement result);
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};
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