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/*
* Copyright (c) 2017 - 2019, SmartDeviceLink Consortium, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the SmartDeviceLink Consortium, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.smartdevicelink.managers.audio;
import android.content.Context;
import android.media.MediaCodec;
import android.media.MediaFormat;
import android.net.Uri;
import android.os.Build;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import com.smartdevicelink.managers.audio.AudioStreamManager.SampleType;
import com.smartdevicelink.util.DebugTool;
import java.nio.ByteBuffer;
/**
* The audio decoder to decode a single audio file to PCM.
*/
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class AudioDecoder extends BaseAudioDecoder {
private static final String TAG = AudioDecoder.class.getSimpleName();
/**
* Creates a new object of AudioDecoder.
* @param audioSource The audio source to decode.
* @param context The context object to use to open the audio source.
* @param sampleRate The desired sample rate for decoded audio data.
* @param sampleType The desired sample type (8bit, 16bit, float).
* @param listener A listener who receives the decoded audio.
*/
AudioDecoder(Uri audioSource, Context context, int sampleRate, @SampleType int sampleType, AudioDecoderListener listener) {
super(audioSource, context, sampleRate, sampleType, listener);
}
/**
* Starts the audio decoding asynchronously.
*/
public void start() {
try {
initMediaComponents();
decoder.setCallback(new MediaCodec.Callback() {
@Override
public void onInputBufferAvailable(@NonNull MediaCodec mediaCodec, int i) {
ByteBuffer inputBuffer = mediaCodec.getInputBuffer(i);
if (inputBuffer == null) return;
MediaCodec.BufferInfo info = AudioDecoder.super.onInputBufferAvailable(extractor, inputBuffer);
mediaCodec.queueInputBuffer(i, info.offset, info.size, info.presentationTimeUs, info.flags);
}
@Override
public void onOutputBufferAvailable(@NonNull MediaCodec mediaCodec, int i, @NonNull MediaCodec.BufferInfo bufferInfo) {
ByteBuffer outputBuffer = mediaCodec.getOutputBuffer(i);
if (outputBuffer == null) return;
if (outputBuffer.limit() > 0) {
SampleBuffer targetSampleBuffer = AudioDecoder.super.onOutputBufferAvailable(outputBuffer);
AudioDecoder.this.listener.onAudioDataAvailable(targetSampleBuffer);
} else {
DebugTool.logWarning(TAG, "output buffer empty. Chance that silence was detected");
}
mediaCodec.releaseOutputBuffer(i, false);
if (bufferInfo.flags == MediaCodec.BUFFER_FLAG_END_OF_STREAM) {
listener.onDecoderFinish(true);
stop();
}
}
@Override
public void onOutputFormatChanged(@NonNull MediaCodec mediaCodec, @NonNull MediaFormat mediaFormat) {
AudioDecoder.super.onOutputFormatChanged(mediaFormat);
}
@Override
public void onError(@NonNull MediaCodec mediaCodec, @NonNull MediaCodec.CodecException e) {
AudioDecoder.super.onMediaCodecError(e);
}
});
decoder.start();
} catch (Exception e) {
e.printStackTrace();
listener.onDecoderError(e);
listener.onDecoderFinish(false);
stop();
}
}
}
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