update androidTranscoder to version 0.3

2 files changed, 51 insertions, 3 deletions

diff --git a/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/engine/MediaTranscoderEngine.java b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/engine/MediaTranscoderEngine.java
index e56e307b1..3abdbaf54 100644
--- a/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/engine/MediaTranscoderEngine.java
+++ b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/engine/MediaTranscoderEngine.java
@@ -19,9 +19,12 @@ import android.media.MediaExtractor;
 import android.media.MediaFormat;
 import android.media.MediaMetadataRetriever;
 import android.media.MediaMuxer;
+import android.os.Build;
 import android.util.Log;
 
+import net.ypresto.androidtranscoder.BuildConfig;
 import net.ypresto.androidtranscoder.format.MediaFormatStrategy;
+import net.ypresto.androidtranscoder.utils.ISO6709LocationParser;
 import net.ypresto.androidtranscoder.utils.MediaExtractorUtils;
 
 import java.io.FileDescriptor;
@@ -137,9 +140,17 @@ public class MediaTranscoderEngine {
             // skip
         }
 
-        // TODO: parse ISO 6709
-        // String locationString = mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_LOCATION);
-        // mMuxer.setLocation(Integer.getInteger(rotationString, 0));
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+            String locationString = mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_LOCATION);
+            if (locationString != null) {
+                float[] location = new ISO6709LocationParser().parse(locationString);
+                if (location != null) {
+                    mMuxer.setLocation(location[0], location[1]);
+                } else {
+                    Log.d(TAG, "Failed to parse the location metadata: " + locationString);
+                }
+            }
+        }
 
         try {
             mDurationUs = Long.parseLong(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION)) * 1000;
diff --git a/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/utils/ISO6709LocationParser.java b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/utils/ISO6709LocationParser.java
new file mode 100644
index 000000000..273007d3c
--- /dev/null
+++ b/libs/android-transcoder/src/main/java/net/ypresto/androidtranscoder/utils/ISO6709LocationParser.java
@@ -0,0 +1,37 @@
+package net.ypresto.androidtranscoder.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class ISO6709LocationParser {
+    private final Pattern pattern;
+
+    public ISO6709LocationParser() {
+        this.pattern = Pattern.compile("([+\\-][0-9.]+)([+\\-][0-9.]+)");
+    }
+
+    /**
+     * This method parses the given string representing a geographic point location by coordinates in ISO 6709 format
+     * and returns the latitude and the longitude in float. If <code>location</code> is not in ISO 6709 format,
+     * this method returns <code>null</code>
+     *
+     * @param location a String representing a geographic point location by coordinates in ISO 6709 format
+     * @return <code>null</code> if the given string is not as expected, an array of floats with size 2,
+     * where the first element represents latitude and the second represents longitude, otherwise.
+     */
+    public float[] parse(String location) {
+        if (location == null) return null;
+        Matcher m = pattern.matcher(location);
+        if (m.find() && m.groupCount() == 2) {
+            String latstr = m.group(1);
+            String lonstr = m.group(2);
+            try {
+                float lat = Float.parseFloat(latstr);
+                float lon = Float.parseFloat(lonstr);
+                return new float[]{lat, lon};
+            } catch (NumberFormatException ignored) {
+            }
+        }
+        return null;
+    }
+}