From 227de4e6a0be638b78386050ba188dc33cc30427 Mon Sep 17 00:00:00 2001
From: Sergii Doroshenko <x0163979@ti.com>
Date: Fri, 20 Jul 2012 16:46:23 -0500
Subject: AACExtractor: Added support for APE tag

To support aac audio with APE tag we need parse
this tag. Otherwise AACExtractor stops reading of
audio file.

DR: OMAPS00267689

Change-Id: Ic697b90dbc9f2b93aeb227411359c36c113cb71e
Signed-off-by: Daniel Levin <dendy@ti.com>
---
 media/libstagefright/APE.cpp | 125 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 media/libstagefright/APE.cpp

(limited to 'media/libstagefright/APE.cpp')

diff --git a/media/libstagefright/APE.cpp b/media/libstagefright/APE.cpp
new file mode 100644
index 0000000..74ca7dc
--- /dev/null
+++ b/media/libstagefright/APE.cpp
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) Texas Instruments - http://www.ti.com/
+ *
+ * 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.
+ */
+
+#define LOG_TAG "APE_TAG"
+#include <utils/Log.h>
+
+#include "include/APE.h"
+
+namespace android {
+
+APE::APE(){
+
+}
+
+APE::~APE(){
+
+}
+
+bool APE::isAPE(uint8_t *apeTag) const {
+    if(apeTag[0] == 'A' && apeTag[1] == 'P' && apeTag[2] == 'E' &&
+        apeTag[3] == 'T' && apeTag[4] == 'A' && apeTag[5] == 'G' &&
+        apeTag[6] == 'E' && apeTag[7] == 'X'){
+        return true;
+    }
+    return false;
+}
+
+size_t sizeItemKey(const sp<DataSource> &source, off64_t offset){
+    off64_t ItemKeyOffset = offset;
+    uint8_t keyTerminator = 0;
+    size_t keySize = 0;
+    while (keyTerminator != 0){
+        source->readAt(ItemKeyOffset, &keyTerminator, 1);
+        ItemKeyOffset++;
+        keySize++;
+    }
+    return keySize - 1;
+}
+
+bool APE::parseAPE(const sp<DataSource> &source, off64_t offset,
+        sp<MetaData> &meta){
+
+    struct Map {
+            int key;
+            const char *tag;
+    } const kMap[] = {
+            { kKeyAlbum, "Album" },
+            { kKeyArtist, "Artist" },
+            { kKeyAlbumArtist, "Album" },
+            { kKeyComposer, "Composer" },
+            { kKeyGenre, "Genre" },
+            { kKeyTitle, "Title" },
+            { kKeyYear, "Year" },
+            { kKeyCDTrackNumber, "Track" },
+            { kKeyDate, "Record Date"},
+    };
+
+    static const size_t kNumMapEntries = sizeof(kMap) / sizeof(kMap[0]);
+
+    off64_t headerOffset = offset;
+    headerOffset += 16;
+    itemNumber = 0;
+    if (source->readAt(headerOffset, &itemNumber, 1) == 0)
+        return false;
+
+    headerOffset += 16;
+
+    for(uint32_t it = 0; it < itemNumber; it++){
+        lenValue = 0;
+        if (source->readAt(headerOffset, &lenValue, 1) == 0)
+            return false;
+
+        headerOffset += 4;
+
+        itemFlags = 0;
+        if (source->readAt(headerOffset, &itemFlags, 1) == 0)
+            return false;
+
+        headerOffset += 4;
+
+        size_t sizeKey = sizeItemKey(source, headerOffset);
+
+        char *key = new char[sizeKey];
+
+        if (source->readAt(headerOffset, key, sizeKey) == 0)
+            return false;
+
+        key[sizeKey] = '\0';
+        headerOffset += sizeKey + 1;
+
+        char *val = new char[lenValue + 1];
+
+        if (source->readAt(headerOffset, val, lenValue) == 0)
+            return false;
+
+        val[lenValue] = '\0';
+
+        for (size_t i = 0; i < kNumMapEntries; i++){
+            if (!strcmp(key, kMap[i].tag)){
+                if (itemFlags == 0)
+                    meta->setCString(kMap[i].key, (const char *)val);
+                break;
+            }
+        }
+        headerOffset += lenValue;
+        delete[] key;
+        delete[] val;
+    }
+
+    return true;
+}
+} //namespace android
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