AudioSourceSettingsCamcorderProfileResolver.java
/*
* Copyright 2021 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.
*/
package androidx.camera.video.internal.config;
import android.util.Range;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.camera.core.Logger;
import androidx.camera.core.impl.CamcorderProfileProxy;
import androidx.camera.video.AudioSpec;
import androidx.camera.video.internal.AudioSource;
import androidx.core.util.Supplier;
/**
* An {@link AudioSource.Settings} supplier that resolves requested source settings from an
* {@link AudioSpec} using a {@link CamcorderProfileProxy}.
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
public final class AudioSourceSettingsCamcorderProfileResolver implements
Supplier<AudioSource.Settings> {
private static final String TAG = "AudioSrcCmcrdrPrflRslvr";
private final AudioSpec mAudioSpec;
private final CamcorderProfileProxy mCamcorderProfile;
/**
* Constructor for an AudioSourceSettingsCamcorderProfileResolver.
*
* @param camcorderProfile The {@link CamcorderProfileProxy} used to resolve automatic and
* range settings.
* @param audioSpec The {@link AudioSpec} which defines the settings that should be
* used with the audio source.
*/
public AudioSourceSettingsCamcorderProfileResolver(@NonNull AudioSpec audioSpec,
@NonNull CamcorderProfileProxy camcorderProfile) {
mAudioSpec = audioSpec;
mCamcorderProfile = camcorderProfile;
}
@Override
@NonNull
public AudioSource.Settings get() {
// Resolve audio source
int resolvedAudioSource = AudioConfigUtil.resolveAudioSource(mAudioSpec);
// Resolve source format
int resolvedSourceFormat = AudioConfigUtil.resolveAudioSourceFormat(
mAudioSpec);
int audioSpecChannelCount = mAudioSpec.getChannelCount();
Range<Integer> audioSpecSampleRate = mAudioSpec.getSampleRate();
int resolvedSampleRate;
int resolvedChannelCount;
int camcorderProfileChannelCount = mCamcorderProfile.getAudioChannels();
if (audioSpecChannelCount == AudioSpec.CHANNEL_COUNT_AUTO) {
resolvedChannelCount = camcorderProfileChannelCount;
Logger.d(TAG, "Resolved AUDIO channel count from CamcorderProfile: "
+ resolvedChannelCount);
} else {
resolvedChannelCount = audioSpecChannelCount;
Logger.d(TAG, "Media spec AUDIO channel count overrides CamcorderProfile "
+ "[CamcorderProfile channel count: " + camcorderProfileChannelCount
+ ", Resolved Channel Count: " + resolvedChannelCount + "]");
}
int camcorderProfileAudioSampleRate = mCamcorderProfile.getAudioSampleRate();
resolvedSampleRate = AudioConfigUtil.selectSampleRateOrNearestSupported(
audioSpecSampleRate, resolvedChannelCount, resolvedSourceFormat,
camcorderProfileAudioSampleRate);
Logger.d(TAG, "Using resolved AUDIO sample rate or nearest supported from "
+ "CamcorderProfile: " + resolvedSampleRate + "Hz. [CamcorderProfile sample rate: "
+ camcorderProfileAudioSampleRate + "Hz]");
return AudioSource.Settings.builder()
.setAudioSource(resolvedAudioSource)
.setAudioFormat(resolvedSourceFormat)
.setChannelCount(resolvedChannelCount)
.setSampleRate(resolvedSampleRate)
.build();
}
}