1 files changed, 50 insertions, 0 deletions
diff --git a/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/engine/MediaFormatValidator.java b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/engine/MediaFormatValidator.java
new file mode 100644
index 000000000..67ea5ba85
--- /dev/null
+++ b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/engine/MediaFormatValidator.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2015 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.engine;
+
+import android.media.MediaFormat;
+
+import net.ypresto.androidtranscoder.format.MediaFormatExtraConstants;
+import net.ypresto.androidtranscoder.utils.AvcCsdUtils;
+import net.ypresto.androidtranscoder.utils.AvcSpsUtils;
+
+import java.nio.ByteBuffer;
+
+class MediaFormatValidator {
+    // Refer: http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC#Profiles
+    private static final byte PROFILE_IDC_BASELINE = 66;
+
+    public static void validateVideoOutputFormat(MediaFormat format) {
+        String mime = format.getString(MediaFormat.KEY_MIME);
+        // Refer: http://developer.android.com/guide/appendix/media-formats.html#core
+        // Refer: http://en.wikipedia.org/wiki/MPEG-4_Part_14#Data_streams
+        if (!MediaFormatExtraConstants.MIMETYPE_VIDEO_AVC.equals(mime)) {
+            throw new InvalidOutputFormatException("Video codecs other than AVC is not supported, actual mime type: " + mime);
+        }
+        ByteBuffer spsBuffer = AvcCsdUtils.getSpsBuffer(format);
+        byte profileIdc = AvcSpsUtils.getProfileIdc(spsBuffer);
+        if (profileIdc != PROFILE_IDC_BASELINE) {
+            throw new InvalidOutputFormatException("Non-baseline AVC video profile is not supported by Android OS, actual profile_idc: " + profileIdc);
+        }
+    }
+
+    public static void validateAudioOutputFormat(MediaFormat format) {
+        String mime = format.getString(MediaFormat.KEY_MIME);
+        if (!MediaFormatExtraConstants.MIMETYPE_AUDIO_AAC.equals(mime)) {
+            throw new InvalidOutputFormatException("Audio codecs other than AAC is not supported, actual mime type: " + mime);
+        }
+    }
+}