1 files changed, 80 insertions, 0 deletions
diff --git a/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/format/MediaFormatPresets.java b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/format/MediaFormatPresets.java
new file mode 100644
index 000000000..086bcd3f3
--- /dev/null
+++ b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/format/MediaFormatPresets.java
@@ -0,0 +1,80 @@
+/*
+ * 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;
+
+// Refer for example: https://gist.github.com/wobbals/3990442
+// Refer for preferred parameters: https://developer.apple.com/library/ios/documentation/networkinginternet/conceptual/streamingmediaguide/UsingHTTPLiveStreaming/UsingHTTPLiveStreaming.html#//apple_ref/doc/uid/TP40008332-CH102-SW8
+// Refer for available keys: (ANDROID ROOT)/media/libstagefright/ACodec.cpp
+public class MediaFormatPresets {
+    private static final int LONGER_LENGTH_960x540 = 960;
+
+    private MediaFormatPresets() {
+    }
+
+    // preset similar to iOS SDK's AVAssetExportPreset960x540
+    @Deprecated
+    public static MediaFormat getExportPreset960x540() {
+        MediaFormat format = MediaFormat.createVideoFormat("video/avc", 960, 540);
+        format.setInteger(MediaFormat.KEY_BIT_RATE, 5500 * 1000);
+        format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
+        format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
+        format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 1);
+        return format;
+    }
+
+    /**
+     * Preset similar to iOS SDK's AVAssetExportPreset960x540.
+     * Note that encoding resolutions of this preset are not supported in all devices e.g. Nexus 4.
+     * On unsupported device encoded video stream will be broken without any exception.
+     * @param originalWidth Input video width.
+     * @param originalHeight Input video height.
+     * @return MediaFormat instance, or null if pass through.
+     */
+    public static MediaFormat getExportPreset960x540(int originalWidth, int originalHeight) {
+        int longerLength = Math.max(originalWidth, originalHeight);
+        int shorterLength = Math.min(originalWidth, originalHeight);
+
+        if (longerLength <= LONGER_LENGTH_960x540) return null; // don't upscale
+
+        int residue = LONGER_LENGTH_960x540 * shorterLength % longerLength;
+        if (residue != 0) {
+            double ambiguousShorter = (double) LONGER_LENGTH_960x540 * shorterLength / longerLength;
+            throw new OutputFormatUnavailableException(String.format(
+                    "Could not fit to integer, original: (%d, %d), scaled: (%d, %f)",
+                    longerLength, shorterLength, LONGER_LENGTH_960x540, ambiguousShorter));
+        }
+
+        int scaledShorter = LONGER_LENGTH_960x540 * shorterLength / longerLength;
+        int width, height;
+        if (originalWidth >= originalHeight) {
+            width = LONGER_LENGTH_960x540;
+            height = scaledShorter;
+        } else {
+            width = scaledShorter;
+            height = LONGER_LENGTH_960x540;
+        }
+
+        MediaFormat format = MediaFormat.createVideoFormat("video/avc", width, height);
+        format.setInteger(MediaFormat.KEY_BIT_RATE, 5500 * 1000);
+        format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
+        format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
+        format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 1);
+        return format;
+    }
+}