a2f67b4f7b
We don't have an actual implementation returning anything but the defaults, so apply the defaults directly anywhere we need them Change-Id: Ic651b4b13977799f2f4d2c702c430798fbff77f8
80 lines
2.9 KiB
Java
80 lines
2.9 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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* Copyright (C) 2024 The LineageOS 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 com.android.messaging.util;
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import android.content.Context;
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import android.text.format.Formatter;
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import com.google.common.base.Stopwatch;
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import java.io.File;
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import java.util.concurrent.TimeUnit;
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/**
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* Compresses a GIF so it can be sent via MMS.
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* <p>
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* The entry point lives in its own class, we can defer loading the native GIF transcoding library
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* into memory until we actually need it.
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*/
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public class GifTranscoder {
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private static final String TAG = LogUtil.BUGLE_TAG;
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private static final int MIN_HEIGHT = 100;
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private static final int MIN_WIDTH = 100;
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static {
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System.loadLibrary("giftranscode");
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}
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public static boolean transcode(Context context, String filePath, String outFilePath) {
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final long inputSize = new File(filePath).length();
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Stopwatch stopwatch = Stopwatch.createStarted();
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final boolean success = transcodeInternal(filePath, outFilePath);
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stopwatch.stop();
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final long elapsedMs = stopwatch.elapsed(TimeUnit.MILLISECONDS);
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final long outputSize = new File(outFilePath).length();
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final float compression = (inputSize > 0) ? ((float) outputSize / inputSize) : 0;
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if (success) {
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LogUtil.i(TAG, String.format("Resized GIF (%s) in %d ms, %s => %s (%.0f%%)",
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LogUtil.sanitizePII(filePath),
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elapsedMs,
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Formatter.formatShortFileSize(context, inputSize),
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Formatter.formatShortFileSize(context, outputSize),
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compression * 100.0f));
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}
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return success;
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}
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private static native boolean transcodeInternal(String filePath, String outFilePath);
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/**
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* Estimates the size of a GIF transcoded from a GIF with the specified size.
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*/
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public static long estimateFileSizeAfterTranscode(long fileSize) {
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// I tested transcoding on ~70 GIFs and found that the transcoded files are in general
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// about 25-35% the size of the original. This compression ratio is very consistent for the
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// class of GIFs we care about most: those converted from video clips and 1-3 MB in size.
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return (long) (fileSize * 0.35f);
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}
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public static boolean canBeTranscoded(int width, int height) {
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return width >= MIN_WIDTH && height >= MIN_HEIGHT;
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}
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}
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