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programminghoch10programminghoch10
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Initial working version of CodecMod
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‎CodecMod/build.gradle.kts‎

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plugins {
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alias(libs.plugins.buildlogic.android.application)
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}
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android {
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namespace = "com.programminghoch10.CodecMod"
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defaultConfig {
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minSdk = 29
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targetSdk = 35
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}
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}
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dependencies {
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implementation(libs.androidx.preference)
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}

‎CodecMod/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<application android:label="@string/app_name">
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<activity
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android:name=".SettingsActivity"
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android:exported="true"
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android:label="@string/title_activity_settings"
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android:theme="@android:style/Theme.DeviceDefault.Settings">
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<intent-filter>
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<action android:name="android.intent.action.APPLICATION_PREFERENCES" />
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<category android:name="android.intent.category.DEFAULT" />
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<action android:name="android.intent.action.MAIN" />
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<category android:name="de.robv.android.xposed.category.MODULE_SETTINGS" />
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</intent-filter>
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</activity>
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<meta-data
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android:name="xposedmodule"
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android:value="true" />
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<meta-data
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android:name="xposeddescription"
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android:value="@string/app_name" />
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<meta-data
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android:name="xposedminversion"
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android:value="93" />
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</application>
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</manifest>

‎CodecMod/src/main/assets/xposed_init‎

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com.programminghoch10.CodecMod.Hook

‎CodecMod/src/main/java/com/programminghoch10/CodecMod/CodecStore.java‎

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package com.programminghoch10.CodecMod;
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import static android.content.Context.MODE_WORLD_READABLE;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.media.MediaCodecInfo;
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import java.util.LinkedList;
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import java.util.List;
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import de.robv.android.xposed.XSharedPreferences;
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public class CodecStore {
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static final boolean DEFAULT_VALUE = true;
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private static final boolean REMOVE_DEFAULT_VALUE_FROM_CONFIG = true;
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private static final String PREFERENCES = "codecs";
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SharedPreferences sharedPreferences;
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List<OnCodecPreferenceChangedListenerMeta> receivers = new LinkedList<>();
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CodecStore(Context context) {
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this.sharedPreferences = context.getSharedPreferences(PREFERENCES, MODE_WORLD_READABLE);
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}
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CodecStore() {
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this.sharedPreferences = new XSharedPreferences(BuildConfig.APPLICATION_ID, PREFERENCES);
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}
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static String getKey(MediaCodecInfo mediaCodecInfo) {
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return "codec_" + mediaCodecInfo.getCanonicalName();
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}
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boolean getCodecPreference(MediaCodecInfo mediaCodecInfo) {
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return sharedPreferences.getBoolean(getKey(mediaCodecInfo), DEFAULT_VALUE);
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}
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boolean setCodecPreference(MediaCodecInfo mediaCodecInfo, boolean enabled) {
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boolean success = false;
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if (REMOVE_DEFAULT_VALUE_FROM_CONFIG && enabled == DEFAULT_VALUE) {
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success = sharedPreferences.edit().remove(getKey(mediaCodecInfo)).commit();
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} else {
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success = sharedPreferences.edit().putBoolean(getKey(mediaCodecInfo), enabled).commit();
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}
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if (!success)
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return success;
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dispatchOnCodecPreferenceChanged(mediaCodecInfo, enabled);
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return success;
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}
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void registerOnCodecPreferenceChangedListener(MediaCodecInfo mediaCodecInfo, OnCodecPreferenceChangedListener onCodecPreferenceChangedListener) {
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OnCodecPreferenceChangedListenerMeta listener = new OnCodecPreferenceChangedListenerMeta();
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listener.mediaCodecInfo = mediaCodecInfo;
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listener.callback = onCodecPreferenceChangedListener;
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receivers.add(listener);
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}
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private void dispatchOnCodecPreferenceChanged(MediaCodecInfo mediaCodecInfo, boolean enabled) {
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receivers.stream()
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.filter(r -> getKey(r.mediaCodecInfo).equals(getKey(mediaCodecInfo)))
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.forEach(r -> r.callback.onCodecPreferenceChanged(enabled));
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}
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interface OnCodecPreferenceChangedListener {
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void onCodecPreferenceChanged(boolean value);
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}
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private class OnCodecPreferenceChangedListenerMeta {
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MediaCodecInfo mediaCodecInfo;
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OnCodecPreferenceChangedListener callback;
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}
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}

‎CodecMod/src/main/java/com/programminghoch10/CodecMod/Hook.java‎

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package com.programminghoch10.CodecMod;
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import android.media.MediaCodecInfo;
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import android.media.MediaCodecList;
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import java.util.Arrays;
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import de.robv.android.xposed.IXposedHookLoadPackage;
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import de.robv.android.xposed.XC_MethodReplacement;
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import de.robv.android.xposed.XposedBridge;
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import de.robv.android.xposed.XposedHelpers;
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import de.robv.android.xposed.callbacks.XC_LoadPackage;
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public class Hook implements IXposedHookLoadPackage {
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@Override
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public void handleLoadPackage(XC_LoadPackage.LoadPackageParam lpparam) throws Throwable {
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if (lpparam.packageName.equals(BuildConfig.APPLICATION_ID)) return;
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if (lpparam.packageName.equals("android")) {
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// system-wide hooking not implemented
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return;
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}
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XposedHelpers.findAndHookMethod(MediaCodecList.class, "getCodecInfos", new XC_MethodReplacement() {
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@Override
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protected Object replaceHookedMethod(MethodHookParam param) throws Throwable {
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MediaCodecInfo[] mediaCodecInfos = (MediaCodecInfo[]) XposedBridge.invokeOriginalMethod(param.method, param.thisObject, param.args);
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if (mediaCodecInfos.length == 0) return mediaCodecInfos;
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CodecStore codecStore = new CodecStore();
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MediaCodecInfo[] filteredMediaCodecInfos = Arrays.stream(mediaCodecInfos)
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.filter(codecStore::getCodecPreference)
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.toArray(MediaCodecInfo[]::new);
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return filteredMediaCodecInfos;
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}
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});
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// reimplementations of deprecated methods for compatibility
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XposedHelpers.findAndHookMethod(MediaCodecList.class, "getCodecCount", new XC_MethodReplacement() {
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@Override
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protected Object replaceHookedMethod(MethodHookParam param) throws Throwable {
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return (new MediaCodecList(MediaCodecList.REGULAR_CODECS)).getCodecInfos().length;
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}
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});
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XposedHelpers.findAndHookMethod(MediaCodecList.class, "getCodecInfoAt", int.class, new XC_MethodReplacement() {
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@Override
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protected Object replaceHookedMethod(MethodHookParam param) throws Throwable {
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final int position = (int) param.args[0];
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MediaCodecInfo[] mediaCodecInfos = (new MediaCodecList(MediaCodecList.REGULAR_CODECS)).getCodecInfos();
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if (position < 0 || position >= mediaCodecInfos.length) throw new IllegalArgumentException();
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return mediaCodecInfos[position];
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}
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});
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}
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}

‎CodecMod/src/main/java/com/programminghoch10/CodecMod/SettingsActivity.java‎

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package com.programminghoch10.CodecMod;
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import android.app.ActionBar;
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import android.media.MediaCodecInfo;
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import android.media.MediaCodecList;
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import android.os.Bundle;
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import androidx.fragment.app.FragmentActivity;
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import androidx.preference.PreferenceCategory;
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import androidx.preference.PreferenceFragmentCompat;
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import androidx.preference.SwitchPreference;
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import java.util.Arrays;
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public class SettingsActivity extends FragmentActivity {
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.settings_activity);
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if (savedInstanceState == null) {
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getSupportFragmentManager()
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.beginTransaction()
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.replace(R.id.settings, new SettingsFragment())
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.commit();
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}
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ActionBar actionBar = getActionBar();
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if (actionBar != null) {
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actionBar.setDisplayHomeAsUpEnabled(
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getSupportFragmentManager().getBackStackEntryCount() > 0
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);
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}
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}
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public static class SettingsFragment extends PreferenceFragmentCompat {
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private static final boolean SHOW_ALIASES = true;
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CodecStore codecStore = null;
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@Override
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public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
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setPreferencesFromResource(R.xml.root_preferences, rootKey);
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//getPreferenceManager().setSharedPreferencesName("codecs");
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CodecStore codecStore = new CodecStore(getContext());
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PreferenceCategory decodersPreferenceCategory = findPreference("category_decoders");
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PreferenceCategory encodersPreferenceCategory = findPreference("category_encoders");
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MediaCodecList mediaCodecList = new MediaCodecList(MediaCodecList.ALL_CODECS);
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for (MediaCodecInfo mediaCodecInfo : mediaCodecList.getCodecInfos()) {
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if (mediaCodecInfo.isAlias() && !SHOW_ALIASES) continue;
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SwitchPreference preference = new SwitchPreference(getContext());
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preference.setPersistent(false);
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preference.setDefaultValue(CodecStore.DEFAULT_VALUE);
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preference.setKey(CodecStore.getKey(mediaCodecInfo));
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preference.setOnPreferenceChangeListener((p, n) -> codecStore.setCodecPreference(mediaCodecInfo, (Boolean) n));
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codecStore.registerOnCodecPreferenceChangedListener(mediaCodecInfo, value -> {
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if (preference.isChecked() != value) preference.setChecked(value);
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});
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preference.setTitle(mediaCodecInfo.getName()
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+ (mediaCodecInfo.getName().equals(mediaCodecInfo.getCanonicalName()) ? "" : " (" + mediaCodecInfo.getCanonicalName() + ")"));
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preference.setSummary(
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String.format(getString(R.string.hardware_accelerated), mediaCodecInfo.isHardwareAccelerated())
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+ "\n" +
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String.format(getString(R.string.software_only), mediaCodecInfo.isSoftwareOnly())
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+ "\n" +
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String.format(getString(R.string.supported_types), Arrays.toString(mediaCodecInfo.getSupportedTypes())) +
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(SHOW_ALIASES ? "\n" +
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String.format(getString(R.string.alias), mediaCodecInfo.isAlias()) : "")
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+ "\n" +
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String.format(getString(R.string.vendor), mediaCodecInfo.isVendor())
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);
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PreferenceCategory preferenceCategory = mediaCodecInfo.isEncoder() ? encodersPreferenceCategory : decodersPreferenceCategory;
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preferenceCategory.addPreference(preference);
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preference.setChecked(codecStore.getCodecPreference(mediaCodecInfo));
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}
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}
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}
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}

‎CodecMod/src/main/res/layout/settings_activity.xml‎

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="match_parent">
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<FrameLayout
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android:id="@+id/settings"
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android:layout_width="match_parent"
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android:layout_height="match_parent" />
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</LinearLayout>

‎CodecMod/src/main/res/values/strings.xml‎

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<resources>
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<string name="app_name">CodecMod</string>
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<string name="title_activity_settings">CodecMod Settings</string>
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<string name="hardware_accelerated">Hardware-accelerated: %b</string>
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<string name="software_only">Software-only: %b</string>
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<string name="supported_types">Supported MIME-Types: %s</string>
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<string name="alias">Alias: %b</string>
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<string name="vendor">Vendor: %b</string>
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</resources>

‎CodecMod/src/main/res/xml/root_preferences.xml‎

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<PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto">
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<PreferenceCategory
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app:key="category_decoders"
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app:title="Decoders" />
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<PreferenceCategory
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app:key="category_encoders"
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app:title="Encoders" />
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</PreferenceScreen>

‎gradle/libs.versions.toml‎

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jebrainsAnnotations = "26.0.2"
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kotlin = "2.2.0"
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xposed = "82"
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preference = "1.2.1"
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[libraries]
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android-desugarJdkLibs = { module = "com.android.tools:desugar_jdk_libs", version.ref = "androidDesugarJdkLibs" }
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kotlin-stdlib-jdk8 = { module = "org.jetbrains.kotlin:kotlin-stdlib-jdk8" }
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libsu-core = { module = "com.github.topjohnwu.libsu:core", version.ref = "libsu" }
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xposed-api = { module = "de.robv.android.xposed:api", version.ref = "xposed" }
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androidx-preference = { group = "androidx.preference", name = "preference", version.ref = "preference" }
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[plugins]
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android-application = { id = "com.android.application", version.ref = "androidGradlePlugin" }

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