From 77f8531a739c46cffe7f7fd1e035de542deccf48 Mon Sep 17 00:00:00 2001
From: Marco Nelissen <marcone@google.com>
Date: Wed, 10 Feb 2010 09:56:05 -0800
Subject: Do autodetection even if no locale was specified, and use the
 detected encoding if it is unambiguous.

---
 media/libmedia/MediaScannerClient.cpp | 74 ++++++++++++++++++-----------------
 1 file changed, 39 insertions(+), 35 deletions(-)

(limited to 'media/libmedia/MediaScannerClient.cpp')

diff --git a/media/libmedia/MediaScannerClient.cpp b/media/libmedia/MediaScannerClient.cpp
index bd3596e..bb3717f 100644
--- a/media/libmedia/MediaScannerClient.cpp
+++ b/media/libmedia/MediaScannerClient.cpp
@@ -64,28 +64,26 @@ void MediaScannerClient::beginFile()
 
 bool MediaScannerClient::addStringTag(const char* name, const char* value)
 {
-    if (mLocaleEncoding != kEncodingNone) {
-        // don't bother caching strings that are all ASCII.
-        // call handleStringTag directly instead.
-        // check to see if value (which should be utf8) has any non-ASCII characters
-        bool nonAscii = false;
-        const char* chp = value;
-        char ch;
-        while ((ch = *chp++)) {
-            if (ch & 0x80) {
-                nonAscii = true;
-                break;
-            }
+    // don't bother caching strings that are all ASCII.
+    // call handleStringTag directly instead.
+    // check to see if value (which should be utf8) has any non-ASCII characters
+    bool nonAscii = false;
+    const char* chp = value;
+    char ch;
+    while ((ch = *chp++)) {
+        if (ch & 0x80) {
+            nonAscii = true;
+            break;
         }
+    }
 
-        if (nonAscii) {
-            // save the strings for later so they can be used for native encoding detection
-            mNames->push_back(name);
-            mValues->push_back(value);
-            return true;
-        }
-        // else fall through
+    if (nonAscii) {
+        // save the strings for later so they can be used for native encoding detection
+        mNames->push_back(name);
+        mValues->push_back(value);
+        return true;
     }
+    // else fall through
 
     // autodetection is not necessary, so no need to cache the values
     // pass directly to the client instead
@@ -198,23 +196,29 @@ void MediaScannerClient::convertValues(uint32_t encoding)
 
 void MediaScannerClient::endFile()
 {
-    if (mLocaleEncoding != kEncodingNone) {
-        int size = mNames->size();
-        uint32_t encoding = kEncodingAll;
-
-        // compute a bit mask containing all possible encodings
-        for (int i = 0; i < mNames->size(); i++)
-            encoding &= possibleEncodings(mValues->getEntry(i));
-
-        // if the locale encoding matches, then assume we have a native encoding.
-        if (encoding & mLocaleEncoding)
-            convertValues(mLocaleEncoding);
+    int size = mNames->size();
+    uint32_t encoding = kEncodingAll;
+
+    // compute a bit mask containing all possible encodings
+    for (int i = 0; i < mNames->size(); i++)
+        encoding &= possibleEncodings(mValues->getEntry(i));
+
+    // If one of the possible encodings matches the locale encoding, use that.
+    // Otherwise, if there is only one possible encoding, use that.
+    if (encoding & mLocaleEncoding)
+        convertValues(mLocaleEncoding);
+    else if ((encoding & (encoding - 1)) == 0)
+        convertValues(encoding);
+    else {
+        // TODO: try harder to disambiguate the encoding, perhaps by looking at
+        // other files by same artist, or even the user's entire collection.
+        // For now, fall through and insert the strings as they are.
+    }
 
-        // finally, push all name/value pairs to the client
-        for (int i = 0; i < mNames->size(); i++) {
-            if (!handleStringTag(mNames->getEntry(i), mValues->getEntry(i)))
-                break;
-        }
+    // finally, push all name/value pairs to the client
+    for (int i = 0; i < mNames->size(); i++) {
+        if (!handleStringTag(mNames->getEntry(i), mValues->getEntry(i)))
+            break;
     }
     // else addStringTag() has done all the work so we have nothing to do
 
-- 
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