Added support for ID3v2 meta data in 3gp files

Added support for parsing ID3v2 meta data from
the ID32 chunk in 3gp files. The priority will be
3gpp -> ID3v2 -> iTunes per field.

Change-Id: I0282ecab58e3e5fa6bd738078d562c8bb8ce00ed

6 files changed, 91 insertions, 9 deletions

diff --git a/include/media/stagefright/MetaData.h b/include/media/stagefright/MetaData.h
index 3a87474..db8216b 100644
--- a/include/media/stagefright/MetaData.h
+++ b/include/media/stagefright/MetaData.h
@@ -215,6 +215,8 @@ public:
     bool findData(uint32_t key, uint32_t *type,
                   const void **data, size_t *size) const;
 
+    bool hasData(uint32_t key) const;
+
     void dumpToLog() const;
 
 protected:
diff --git a/media/libstagefright/MPEG4Extractor.cpp b/media/libstagefright/MPEG4Extractor.cpp
index dc73980..4f1c5b3 100644
--- a/media/libstagefright/MPEG4Extractor.cpp
+++ b/media/libstagefright/MPEG4Extractor.cpp
@@ -39,6 +39,7 @@
 #include <utils/String8.h>
 
 #include <byteswap.h>
+#include "include/ID3.h"
 
 namespace android {
 
@@ -1787,6 +1788,18 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
             break;
         }
 
+        case FOURCC('I', 'D', '3', '2'):
+        {
+            if (chunk_data_size < 6) {
+                return ERROR_MALFORMED;
+            }
+
+            parseID3v2MetaData(data_offset + 6);
+
+            *offset += chunk_size;
+            break;
+        }
+
         case FOURCC('-', '-', '-', '-'):
         {
             mLastCommentMean.clear();
@@ -2167,7 +2180,7 @@ status_t MPEG4Extractor::parseITunesMetaData(off64_t offset, size_t size) {
             break;
     }
 
-    if (size >= 8 && metadataKey) {
+    if (size >= 8 && metadataKey && !mFileMetaData->hasData(metadataKey)) {
         if (metadataKey == kKeyAlbumArt) {
             mFileMetaData->setData(
                     kKeyAlbumArt, MetaData::TYPE_NONE,
@@ -2316,6 +2329,62 @@ status_t MPEG4Extractor::parse3GPPMetaData(off64_t offset, size_t size, int dept
     return OK;
 }
 
+void MPEG4Extractor::parseID3v2MetaData(off64_t offset) {
+    ID3 id3(mDataSource, true /* ignorev1 */, offset);
+
+    if (id3.isValid()) {
+        struct Map {
+            int key;
+            const char *tag1;
+            const char *tag2;
+        };
+        static const Map kMap[] = {
+            { kKeyAlbum, "TALB", "TAL" },
+            { kKeyArtist, "TPE1", "TP1" },
+            { kKeyAlbumArtist, "TPE2", "TP2" },
+            { kKeyComposer, "TCOM", "TCM" },
+            { kKeyGenre, "TCON", "TCO" },
+            { kKeyTitle, "TIT2", "TT2" },
+            { kKeyYear, "TYE", "TYER" },
+            { kKeyAuthor, "TXT", "TEXT" },
+            { kKeyCDTrackNumber, "TRK", "TRCK" },
+            { kKeyDiscNumber, "TPA", "TPOS" },
+            { kKeyCompilation, "TCP", "TCMP" },
+        };
+        static const size_t kNumMapEntries = sizeof(kMap) / sizeof(kMap[0]);
+
+        for (size_t i = 0; i < kNumMapEntries; ++i) {
+            if (!mFileMetaData->hasData(kMap[i].key)) {
+                ID3::Iterator *it = new ID3::Iterator(id3, kMap[i].tag1);
+                if (it->done()) {
+                    delete it;
+                    it = new ID3::Iterator(id3, kMap[i].tag2);
+                }
+
+                if (it->done()) {
+                    delete it;
+                    continue;
+                }
+
+                String8 s;
+                it->getString(&s);
+                delete it;
+
+                mFileMetaData->setCString(kMap[i].key, s);
+            }
+        }
+
+        size_t dataSize;
+        String8 mime;
+        const void *data = id3.getAlbumArt(&dataSize, &mime);
+
+        if (data) {
+            mFileMetaData->setData(kKeyAlbumArt, MetaData::TYPE_NONE, data, dataSize);
+            mFileMetaData->setCString(kKeyAlbumArtMIME, mime.string());
+        }
+    }
+}
+
 sp<MediaSource> MPEG4Extractor::getTrack(size_t index) {
     status_t err;
     if ((err = readMetaData()) != OK) {
diff --git a/media/libstagefright/MetaData.cpp b/media/libstagefright/MetaData.cpp
index 7b60afc..1daead7 100644
--- a/media/libstagefright/MetaData.cpp
+++ b/media/libstagefright/MetaData.cpp
@@ -221,6 +221,16 @@ bool MetaData::findData(uint32_t key, uint32_t *type,
     return true;
 }
 
+bool MetaData::hasData(uint32_t key) const {
+    ssize_t i = mItems.indexOfKey(key);
+
+    if (i < 0) {
+        return false;
+    }
+
+    return true;
+}
+
 MetaData::typed_data::typed_data()
     : mType(0),
       mSize(0) {
diff --git a/media/libstagefright/id3/ID3.cpp b/media/libstagefright/id3/ID3.cpp
index 34d671a..1ec4a40 100644
--- a/media/libstagefright/id3/ID3.cpp
+++ b/media/libstagefright/id3/ID3.cpp
@@ -56,14 +56,14 @@ private:
     DISALLOW_EVIL_CONSTRUCTORS(MemorySource);
 };
 
-ID3::ID3(const sp<DataSource> &source, bool ignoreV1)
+ID3::ID3(const sp<DataSource> &source, bool ignoreV1, off64_t offset)
     : mIsValid(false),
       mData(NULL),
       mSize(0),
       mFirstFrameOffset(0),
       mVersion(ID3_UNKNOWN),
       mRawSize(0) {
-    mIsValid = parseV2(source);
+    mIsValid = parseV2(source, offset);
 
     if (!mIsValid && !ignoreV1) {
         mIsValid = parseV1(source);
@@ -79,7 +79,7 @@ ID3::ID3(const uint8_t *data, size_t size, bool ignoreV1)
       mRawSize(0) {
     sp<MemorySource> source = new MemorySource(data, size);
 
-    mIsValid = parseV2(source);
+    mIsValid = parseV2(source, 0);
 
     if (!mIsValid && !ignoreV1) {
         mIsValid = parseV1(source);
@@ -115,7 +115,7 @@ bool ID3::ParseSyncsafeInteger(const uint8_t encoded[4], size_t *x) {
     return true;
 }
 
-bool ID3::parseV2(const sp<DataSource> &source) {
+bool ID3::parseV2(const sp<DataSource> &source, off64_t offset) {
 struct id3_header {
     char id[3];
     uint8_t version_major;
@@ -126,7 +126,7 @@ struct id3_header {
 
     id3_header header;
     if (source->readAt(
-                0, &header, sizeof(header)) != (ssize_t)sizeof(header)) {
+                offset, &header, sizeof(header)) != (ssize_t)sizeof(header)) {
         return false;
     }
 
@@ -185,7 +185,7 @@ struct id3_header {
     mSize = size;
     mRawSize = mSize + sizeof(header);
 
-    if (source->readAt(sizeof(header), mData, mSize) != (ssize_t)mSize) {
+    if (source->readAt(offset + sizeof(header), mData, mSize) != (ssize_t)mSize) {
         free(mData);
         mData = NULL;
 
diff --git a/media/libstagefright/include/ID3.h b/media/libstagefright/include/ID3.h
index cca83ab..e83f3ef 100644
--- a/media/libstagefright/include/ID3.h
+++ b/media/libstagefright/include/ID3.h
@@ -35,7 +35,7 @@ struct ID3 {
         ID3_V2_4,
     };
 
-    ID3(const sp<DataSource> &source, bool ignoreV1 = false);
+    ID3(const sp<DataSource> &source, bool ignoreV1 = false, off64_t offset = 0);
     ID3(const uint8_t *data, size_t size, bool ignoreV1 = false);
     ~ID3();
 
@@ -86,7 +86,7 @@ private:
     size_t mRawSize;
 
     bool parseV1(const sp<DataSource> &source);
-    bool parseV2(const sp<DataSource> &source);
+    bool parseV2(const sp<DataSource> &source, off64_t offset);
     void removeUnsynchronization();
     bool removeUnsynchronizationV2_4(bool iTunesHack);
 
diff --git a/media/libstagefright/include/MPEG4Extractor.h b/media/libstagefright/include/MPEG4Extractor.h
index bd5e4b9..7b4bc6d 100644
--- a/media/libstagefright/include/MPEG4Extractor.h
+++ b/media/libstagefright/include/MPEG4Extractor.h
@@ -97,6 +97,7 @@ private:
     status_t parseChunk(off64_t *offset, int depth);
     status_t parseITunesMetaData(off64_t offset, size_t size);
     status_t parse3GPPMetaData(off64_t offset, size_t size, int depth);
+    void parseID3v2MetaData(off64_t offset);
 
     status_t updateAudioTrackInfoFromESDS_MPEG4Audio(
             const void *esds_data, size_t esds_size);