1 files changed, 88 insertions, 0 deletions
diff --git a/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/format/Android16By9FormatStrategy.java b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/format/Android16By9FormatStrategy.java
new file mode 100644
index 000000000..faf303127
--- /dev/null
+++ b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/format/Android16By9FormatStrategy.java
@@ -0,0 +1,88 @@
+/*
+ * 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.format;
+
+import android.media.MediaCodecInfo;
+import android.media.MediaFormat;
+import android.util.Log;
+
+class Android16By9FormatStrategy implements MediaFormatStrategy {
+    public static final int AUDIO_BITRATE_AS_IS = -1;
+    public static final int AUDIO_CHANNELS_AS_IS = -1;
+    public static final int SCALE_720P = 5;
+    private static final String TAG = "Android16By9FormatStrategy";
+    private final int mScale;
+    private final int mVideoBitrate;
+    private final int mAudioBitrate;
+    private final int mAudioChannels;
+
+    public Android16By9FormatStrategy(int scale, int videoBitrate) {
+        this(scale, videoBitrate, AUDIO_BITRATE_AS_IS, AUDIO_CHANNELS_AS_IS);
+    }
+
+    public Android16By9FormatStrategy(int scale, int videoBitrate, int audioBitrate, int audioChannels) {
+        mScale = scale;
+        mVideoBitrate = videoBitrate;
+        mAudioBitrate = audioBitrate;
+        mAudioChannels = audioChannels;
+    }
+
+    @Override
+    public MediaFormat createVideoOutputFormat(MediaFormat inputFormat) {
+        int width = inputFormat.getInteger(MediaFormat.KEY_WIDTH);
+        int height = inputFormat.getInteger(MediaFormat.KEY_HEIGHT);
+        int targetLonger = mScale * 16 * 16;
+        int targetShorter = mScale * 16 * 9;
+        int longer, shorter, outWidth, outHeight;
+        if (width >= height) {
+            longer = width;
+            shorter = height;
+            outWidth = targetLonger;
+            outHeight = targetShorter;
+        } else {
+            shorter = width;
+            longer = height;
+            outWidth = targetShorter;
+            outHeight = targetLonger;
+        }
+        if (longer * 9 != shorter * 16) {
+            throw new OutputFormatUnavailableException("This video is not 16:9, and is not able to transcode. (" + width + "x" + height + ")");
+        }
+        if (shorter <= targetShorter) {
+            Log.d(TAG, "This video's height is less or equal to " + targetShorter + ", pass-through. (" + width + "x" + height + ")");
+            return null;
+        }
+        MediaFormat format = MediaFormat.createVideoFormat("video/avc", outWidth, outHeight);
+        // From Nexus 4 Camera in 720p
+        format.setInteger(MediaFormat.KEY_BIT_RATE, mVideoBitrate);
+        format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
+        format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 3);
+        format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
+        return format;
+    }
+
+    @Override
+    public MediaFormat createAudioOutputFormat(MediaFormat inputFormat) {
+        if (mAudioBitrate == AUDIO_BITRATE_AS_IS || mAudioChannels == AUDIO_CHANNELS_AS_IS) return null;
+
+        // Use original sample rate, as resampling is not supported yet.
+        final MediaFormat format = MediaFormat.createAudioFormat(MediaFormatExtraConstants.MIMETYPE_AUDIO_AAC,
+                inputFormat.getInteger(MediaFormat.KEY_SAMPLE_RATE), mAudioChannels);
+        format.setInteger(MediaFormat.KEY_AAC_PROFILE, MediaCodecInfo.CodecProfileLevel.AACObjectLC);
+        format.setInteger(MediaFormat.KEY_BIT_RATE, mAudioBitrate);
+        return format;
+    }
+}