1 files changed, 102 insertions, 0 deletions
diff --git a/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/compat/MediaCodecListCompat.java b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/compat/MediaCodecListCompat.java
new file mode 100644
index 000000000..cc4c7a025
--- /dev/null
+++ b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/compat/MediaCodecListCompat.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2014 Yuya Tanaka
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package net.ypresto.androidtranscoder.compat;
+
+import android.media.MediaCodecInfo;
+import android.media.MediaCodecList;
+import android.media.MediaFormat;
+
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+/**
+ * This class emulates basic behavior of MediaCodecList in API level &gt;= 21.
+ * TODO: implement delegate to MediaCodecList in newer API.
+ */
+public class MediaCodecListCompat {
+    public static final int REGULAR_CODECS = 0;
+    public static final int ALL_CODECS = 1;
+
+    public MediaCodecListCompat(int kind) {
+        if (kind != REGULAR_CODECS) {
+            throw new UnsupportedOperationException("kind other than REGULAR_CODECS is not implemented.");
+        }
+    }
+
+    public final String findDecoderForFormat(MediaFormat format) {
+        return findCoderForFormat(format, false);
+    }
+
+    public final String findEncoderForFormat(MediaFormat format) {
+        return findCoderForFormat(format, true);
+    }
+
+    private String findCoderForFormat(MediaFormat format, boolean findEncoder) {
+        String mimeType = format.getString(MediaFormat.KEY_MIME);
+        Iterator<MediaCodecInfo> iterator = new MediaCodecInfoIterator();
+        while (iterator.hasNext()) {
+            MediaCodecInfo codecInfo = iterator.next();
+            if (codecInfo.isEncoder() != findEncoder) continue;
+            if (Arrays.asList(codecInfo.getSupportedTypes()).contains(mimeType)) {
+                return codecInfo.getName();
+            }
+        }
+        return null;
+    }
+
+    public final MediaCodecInfo[] getCodecInfos() {
+        int codecCount = getCodecCount();
+        MediaCodecInfo[] codecInfos = new MediaCodecInfo[codecCount];
+        Iterator<MediaCodecInfo> iterator = new MediaCodecInfoIterator();
+        for (int i = 0; i < codecCount; i++) {
+            codecInfos[i] = getCodecInfoAt(i);
+        }
+        return codecInfos;
+    }
+
+    private static int getCodecCount() {
+        return MediaCodecList.getCodecCount();
+    }
+
+    private static MediaCodecInfo getCodecInfoAt(int index) {
+        return MediaCodecList.getCodecInfoAt(index);
+    }
+
+    private final class MediaCodecInfoIterator implements Iterator<MediaCodecInfo> {
+        private int mCodecCount = getCodecCount();
+        private int mIndex = -1;
+
+        @Override
+        public boolean hasNext() {
+            return mIndex + 1 < mCodecCount;
+        }
+
+        @Override
+        public MediaCodecInfo next() {
+            if (!hasNext()) {
+                throw new NoSuchElementException();
+            }
+            mIndex++;
+            return getCodecInfoAt(mIndex);
+        }
+
+        @Override
+        public void remove() {
+            throw new UnsupportedOperationException();
+        }
+    }
+}