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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.media;
import android.media.MediaCodec;
import android.util.SparseArray;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.mozilla.gecko.mozglue.SharedMemory;
final class SamplePool {
private static final class Impl {
private final String mName;
private int mDefaultBufferSize = 4096;
private final List<Sample> mRecycledSamples = new ArrayList<>();
private final boolean mBufferless;
private int mNextBufferId = Sample.NO_BUFFER + 1;
private SparseArray<SampleBuffer> mBuffers = new SparseArray<>();
private Impl(final String name, final boolean bufferless) {
mName = name;
mBufferless = bufferless;
}
private void setDefaultBufferSize(final int size) {
if (mBufferless) {
throw new IllegalStateException("Setting buffer size of a bufferless pool is not allowed");
}
mDefaultBufferSize = size;
}
private synchronized Sample obtain(final int size) {
if (!mRecycledSamples.isEmpty()) {
return mRecycledSamples.remove(0);
}
if (mBufferless) {
return Sample.obtain();
} else {
return allocateSampleAndBuffer(size);
}
}
private Sample allocateSampleAndBuffer(final int size) {
final int id = mNextBufferId++;
try {
final SharedMemory shm = new SharedMemory(id, Math.max(size, mDefaultBufferSize));
mBuffers.put((Integer) id, new SampleBuffer(shm));
final Sample s = Sample.obtain();
s.bufferId = id;
return s;
} catch (final NoSuchMethodException | IOException e) {
mBuffers.delete(id);
throw new UnsupportedOperationException(e);
}
}
private synchronized SampleBuffer getBuffer(final int id) {
return mBuffers.get(id);
}
private synchronized void recycle(final Sample recycled) {
if (mBufferless || isUsefulSample(recycled)) {
mRecycledSamples.add(recycled);
} else {
disposeSample(recycled);
}
}
private boolean isUsefulSample(final Sample sample) {
return mBuffers.get(sample.bufferId).capacity() >= mDefaultBufferSize;
}
private synchronized void clear() {
for (final Sample s : mRecycledSamples) {
disposeSample(s);
}
mRecycledSamples.clear();
for (int i = 0; i < mBuffers.size(); ++i) {
mBuffers.valueAt(i).dispose();
}
mBuffers.clear();
}
private void disposeSample(final Sample sample) {
if (sample.bufferId != Sample.NO_BUFFER) {
mBuffers.get(sample.bufferId).dispose();
mBuffers.delete(sample.bufferId);
}
sample.dispose();
}
@Override
protected void finalize() {
clear();
}
}
private final Impl mInputs;
private final Impl mOutputs;
/* package */ SamplePool(final String name, final boolean renderToSurface) {
mInputs = new Impl(name + " input sample pool", false);
// Buffers are useless when rendering to surface.
mOutputs = new Impl(name + " output sample pool", renderToSurface);
}
/* package */ void setInputBufferSize(final int size) {
mInputs.setDefaultBufferSize(size);
}
/* package */ void setOutputBufferSize(final int size) {
mOutputs.setDefaultBufferSize(size);
}
/* package */ Sample obtainInput(final int size) {
final Sample input = mInputs.obtain(size);
input.info.set(0, 0, 0, 0);
return input;
}
/* package */ Sample obtainOutput(final MediaCodec.BufferInfo info) {
final Sample output = mOutputs.obtain(info.size);
output.info.set(0, info.size, info.presentationTimeUs, info.flags);
return output;
}
/* package */ void recycleInput(final Sample sample) {
sample.cryptoInfo = null;
mInputs.recycle(sample);
}
/* package */ void recycleOutput(final Sample sample) {
mOutputs.recycle(sample);
}
/* package */ void reset() {
mInputs.clear();
mOutputs.clear();
}
/* package */ SampleBuffer getInputBuffer(final int id) {
return mInputs.getBuffer(id);
}
/* package */ SampleBuffer getOutputBuffer(final int id) {
return mOutputs.getBuffer(id);
}
}
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