Initial migration to Android Studio
This commit is contained in:
Cameron Gutman
@@ -0,0 +1,299 @@
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package com.limelight.binding.video;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileReader;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Locale;
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import android.annotation.SuppressLint;
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import android.annotation.TargetApi;
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import android.media.MediaCodecInfo;
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import android.media.MediaCodecList;
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import android.media.MediaCodecInfo.CodecCapabilities;
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import android.media.MediaCodecInfo.CodecProfileLevel;
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import android.os.Build;
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import com.limelight.LimeLog;
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public class MediaCodecHelper {
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public static final List<String> preferredDecoders;
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public static final List<String> blacklistedDecoderPrefixes;
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public static final List<String> spsFixupBitstreamFixupDecoderPrefixes;
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public static final List<String> whitelistedAdaptiveResolutionPrefixes;
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static {
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preferredDecoders = new LinkedList<String>();
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}
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static {
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blacklistedDecoderPrefixes = new LinkedList<String>();
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// Software decoders that don't support H264 high profile
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blacklistedDecoderPrefixes.add("omx.google");
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blacklistedDecoderPrefixes.add("AVCDecoder");
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}
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static {
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spsFixupBitstreamFixupDecoderPrefixes = new LinkedList<String>();
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spsFixupBitstreamFixupDecoderPrefixes.add("omx.nvidia");
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spsFixupBitstreamFixupDecoderPrefixes.add("omx.qcom");
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spsFixupBitstreamFixupDecoderPrefixes.add("omx.mtk");
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whitelistedAdaptiveResolutionPrefixes = new LinkedList<String>();
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whitelistedAdaptiveResolutionPrefixes.add("omx.nvidia");
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whitelistedAdaptiveResolutionPrefixes.add("omx.qcom");
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whitelistedAdaptiveResolutionPrefixes.add("omx.sec");
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whitelistedAdaptiveResolutionPrefixes.add("omx.TI");
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}
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private static boolean isDecoderInList(List<String> decoderList, String decoderName) {
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for (String badPrefix : decoderList) {
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if (decoderName.length() >= badPrefix.length()) {
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String prefix = decoderName.substring(0, badPrefix.length());
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if (prefix.equalsIgnoreCase(badPrefix)) {
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return true;
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}
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}
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}
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return false;
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}
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@TargetApi(Build.VERSION_CODES.KITKAT)
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public static boolean decoderSupportsAdaptivePlayback(String decoderName, MediaCodecInfo decoderInfo) {
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if (isDecoderInList(whitelistedAdaptiveResolutionPrefixes, decoderName)) {
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LimeLog.info("Adaptive playback supported (whitelist)");
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return true;
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}
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// Possibly enable adaptive playback on KitKat and above
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
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try {
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if (decoderInfo.getCapabilitiesForType("video/avc").
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isFeatureSupported(CodecCapabilities.FEATURE_AdaptivePlayback))
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{
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// This will make getCapabilities() return that adaptive playback is supported
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LimeLog.info("Adaptive playback supported (FEATURE_AdaptivePlayback)");
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return true;
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}
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} catch (Exception e) {
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// Tolerate buggy codecs
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}
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}
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return false;
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}
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public static boolean decoderNeedsSpsBitstreamRestrictions(String decoderName, MediaCodecInfo decoderInfo) {
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return isDecoderInList(spsFixupBitstreamFixupDecoderPrefixes, decoderName);
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}
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@SuppressWarnings("deprecation")
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@SuppressLint("NewApi")
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private static LinkedList<MediaCodecInfo> getMediaCodecList() {
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LinkedList<MediaCodecInfo> infoList = new LinkedList<MediaCodecInfo>();
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
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MediaCodecList mcl = new MediaCodecList(MediaCodecList.REGULAR_CODECS);
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for (MediaCodecInfo info : mcl.getCodecInfos()) {
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infoList.add(info);
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}
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}
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else {
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for (int i = 0; i < MediaCodecList.getCodecCount(); i++) {
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infoList.add(MediaCodecList.getCodecInfoAt(i));
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}
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}
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return infoList;
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}
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public static String dumpDecoders() throws Exception {
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String str = "";
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for (MediaCodecInfo codecInfo : getMediaCodecList()) {
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// Skip encoders
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if (codecInfo.isEncoder()) {
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continue;
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}
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str += "Decoder: "+codecInfo.getName()+"\n";
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for (String type : codecInfo.getSupportedTypes()) {
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str += "\t"+type+"\n";
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CodecCapabilities caps = codecInfo.getCapabilitiesForType(type);
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for (CodecProfileLevel profile : caps.profileLevels) {
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str += "\t\t"+profile.profile+" "+profile.level+"\n";
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}
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}
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}
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return str;
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}
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public static MediaCodecInfo findPreferredDecoder() {
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// This is a different algorithm than the other findXXXDecoder functions,
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// because we want to evaluate the decoders in our list's order
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// rather than MediaCodecList's order
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for (String preferredDecoder : preferredDecoders) {
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for (MediaCodecInfo codecInfo : getMediaCodecList()) {
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// Skip encoders
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if (codecInfo.isEncoder()) {
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continue;
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}
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// Check for preferred decoders
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if (preferredDecoder.equalsIgnoreCase(codecInfo.getName())) {
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LimeLog.info("Preferred decoder choice is "+codecInfo.getName());
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return codecInfo;
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}
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}
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}
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return null;
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}
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public static MediaCodecInfo findFirstDecoder() {
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for (MediaCodecInfo codecInfo : getMediaCodecList()) {
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// Skip encoders
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if (codecInfo.isEncoder()) {
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continue;
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}
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// Check for explicitly blacklisted decoders
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if (isDecoderInList(blacklistedDecoderPrefixes, codecInfo.getName())) {
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LimeLog.info("Skipping blacklisted decoder: "+codecInfo.getName());
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continue;
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}
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// Find a decoder that supports H.264
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for (String mime : codecInfo.getSupportedTypes()) {
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if (mime.equalsIgnoreCase("video/avc")) {
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LimeLog.info("First decoder choice is "+codecInfo.getName());
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return codecInfo;
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}
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}
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}
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return null;
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}
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public static MediaCodecInfo findProbableSafeDecoder() {
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// First look for a preferred decoder by name
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MediaCodecInfo info = findPreferredDecoder();
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if (info != null) {
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return info;
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}
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// Now look for decoders we know are safe
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try {
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// If this function completes, it will determine if the decoder is safe
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return findKnownSafeDecoder();
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} catch (Exception e) {
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// Some buggy devices seem to throw exceptions
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// from getCapabilitiesForType() so we'll just assume
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// they're okay and go with the first one we find
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return findFirstDecoder();
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}
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}
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// We declare this method as explicitly throwing Exception
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// since some bad decoders can throw IllegalArgumentExceptions unexpectedly
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// and we want to be sure all callers are handling this possibility
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public static MediaCodecInfo findKnownSafeDecoder() throws Exception {
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for (MediaCodecInfo codecInfo : getMediaCodecList()) {
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// Skip encoders
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if (codecInfo.isEncoder()) {
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continue;
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}
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// Check for explicitly blacklisted decoders
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if (isDecoderInList(blacklistedDecoderPrefixes, codecInfo.getName())) {
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LimeLog.info("Skipping blacklisted decoder: "+codecInfo.getName());
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continue;
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}
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// Find a decoder that supports H.264 high profile
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for (String mime : codecInfo.getSupportedTypes()) {
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if (mime.equalsIgnoreCase("video/avc")) {
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LimeLog.info("Examining decoder capabilities of "+codecInfo.getName());
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CodecCapabilities caps = codecInfo.getCapabilitiesForType(mime);
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for (CodecProfileLevel profile : caps.profileLevels) {
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if (profile.profile == CodecProfileLevel.AVCProfileHigh) {
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LimeLog.info("Decoder "+codecInfo.getName()+" supports high profile");
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LimeLog.info("Selected decoder: "+codecInfo.getName());
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return codecInfo;
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}
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}
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LimeLog.info("Decoder "+codecInfo.getName()+" does NOT support high profile");
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}
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}
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}
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return null;
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}
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public static String readCpuinfo() throws Exception {
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StringBuilder cpuInfo = new StringBuilder();
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BufferedReader br = new BufferedReader(new FileReader(new File("/proc/cpuinfo")));
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try {
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for (;;) {
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int ch = br.read();
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if (ch == -1)
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break;
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cpuInfo.append((char)ch);
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}
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return cpuInfo.toString();
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} finally {
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br.close();
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}
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}
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private static boolean stringContainsIgnoreCase(String string, String substring) {
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return string.toLowerCase(Locale.ENGLISH).contains(substring.toLowerCase(Locale.ENGLISH));
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}
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public static boolean isExynos4Device() {
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try {
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// Try reading CPU info too look for
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String cpuInfo = readCpuinfo();
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// SMDK4xxx is Exynos 4
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if (stringContainsIgnoreCase(cpuInfo, "SMDK4")) {
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LimeLog.info("Found SMDK4 in /proc/cpuinfo");
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return true;
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}
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// If we see "Exynos 4" also we'll count it
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if (stringContainsIgnoreCase(cpuInfo, "Exynos 4")) {
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LimeLog.info("Found Exynos 4 in /proc/cpuinfo");
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return true;
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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try {
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File systemDir = new File("/sys/devices/system");
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File[] files = systemDir.listFiles();
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if (files != null) {
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for (File f : files) {
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if (stringContainsIgnoreCase(f.getName(), "exynos4")) {
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LimeLog.info("Found exynos4 in /sys/devices/system");
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return true;
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}
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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return false;
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}
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}
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