1 files changed, 232 insertions, 0 deletions
diff --git a/media/libstagefright/MetaData.cpp b/media/libstagefright/MetaData.cpp
new file mode 100644
index 0000000..5d23732
--- /dev/null
+++ b/media/libstagefright/MetaData.cpp
@@ -0,0 +1,232 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <media/stagefright/MetaData.h>
+
+namespace android {
+
+MetaData::MetaData() {
+}
+
+MetaData::MetaData(const MetaData &from)
+    : RefBase(),
+      mItems(from.mItems) {
+}
+
+MetaData::~MetaData() {
+    clear();
+}
+
+void MetaData::clear() {
+    mItems.clear();
+}
+
+bool MetaData::remove(uint32_t key) {
+    ssize_t i = mItems.indexOfKey(key);
+
+    if (i < 0) {
+        return false;
+    }
+
+    mItems.removeItemsAt(i);
+
+    return true;
+}
+
+bool MetaData::setCString(uint32_t key, const char *value) {
+    return setData(key, TYPE_C_STRING, value, strlen(value) + 1);
+}
+
+bool MetaData::setInt32(uint32_t key, int32_t value) {
+    return setData(key, TYPE_INT32, &value, sizeof(value));
+}
+
+bool MetaData::setFloat(uint32_t key, float value) {
+    return setData(key, TYPE_FLOAT, &value, sizeof(value));
+}
+
+bool MetaData::setPointer(uint32_t key, void *value) {
+    return setData(key, TYPE_POINTER, &value, sizeof(value));
+}
+
+bool MetaData::findCString(uint32_t key, const char **value) {
+    uint32_t type;
+    const void *data;
+    size_t size;
+    if (!findData(key, &type, &data, &size) || type != TYPE_C_STRING) {
+        return false;
+    }
+
+    *value = (const char *)data;
+
+    return true;
+}
+
+bool MetaData::findInt32(uint32_t key, int32_t *value) {
+    uint32_t type;
+    const void *data;
+    size_t size;
+    if (!findData(key, &type, &data, &size) || type != TYPE_INT32) {
+        return false;
+    }
+
+    assert(size == sizeof(*value));
+
+    *value = *(int32_t *)data;
+
+    return true;
+}
+
+bool MetaData::findFloat(uint32_t key, float *value) {
+    uint32_t type;
+    const void *data;
+    size_t size;
+    if (!findData(key, &type, &data, &size) || type != TYPE_FLOAT) {
+        return false;
+    }
+
+    assert(size == sizeof(*value));
+
+    *value = *(float *)data;
+
+    return true;
+}
+
+bool MetaData::findPointer(uint32_t key, void **value) {
+    uint32_t type;
+    const void *data;
+    size_t size;
+    if (!findData(key, &type, &data, &size) || type != TYPE_POINTER) {
+        return false;
+    }
+
+    assert(size == sizeof(*value));
+
+    *value = *(void **)data;
+
+    return true;
+}
+
+bool MetaData::setData(
+        uint32_t key, uint32_t type, const void *data, size_t size) {
+    bool overwrote_existing = true;
+
+    ssize_t i = mItems.indexOfKey(key);
+    if (i < 0) {
+        typed_data item;
+        i = mItems.add(key, item);
+
+        overwrote_existing = false;
+    }
+
+    typed_data &item = mItems.editValueAt(i);
+
+    item.setData(type, data, size);
+
+    return overwrote_existing;
+}
+
+bool MetaData::findData(uint32_t key, uint32_t *type,
+                        const void **data, size_t *size) const {
+    ssize_t i = mItems.indexOfKey(key);
+
+    if (i < 0) {
+        return false;
+    }
+
+    const typed_data &item = mItems.valueAt(i);
+
+    item.getData(type, data, size);
+
+    return true;
+}
+
+MetaData::typed_data::typed_data()
+    : mType(0),
+      mSize(0) {
+}
+
+MetaData::typed_data::~typed_data() {
+    clear();
+}
+
+MetaData::typed_data::typed_data(const typed_data &from)
+    : mType(from.mType),
+      mSize(0) {
+    allocateStorage(from.mSize);
+    memcpy(storage(), from.storage(), mSize);
+}
+
+MetaData::typed_data &MetaData::typed_data::operator=(
+        const MetaData::typed_data &from) {
+    if (this != &from) {
+        clear();
+        mType = from.mType;
+        allocateStorage(from.mSize);
+        memcpy(storage(), from.storage(), mSize);
+    }
+
+    return *this;
+}
+
+void MetaData::typed_data::clear() {
+    freeStorage();
+
+    mType = 0;
+}
+
+void MetaData::typed_data::setData(
+        uint32_t type, const void *data, size_t size) {
+    clear();
+
+    mType = type;
+    allocateStorage(size);
+    memcpy(storage(), data, size);
+}
+
+void MetaData::typed_data::getData(
+        uint32_t *type, const void **data, size_t *size) const {
+    *type = mType;
+    *size = mSize;
+    *data = storage();
+}
+
+void MetaData::typed_data::allocateStorage(size_t size) {
+    mSize = size;
+
+    if (usesReservoir()) {
+        return;
+    }
+
+    u.ext_data = malloc(mSize);
+}
+
+void MetaData::typed_data::freeStorage() {
+    if (!usesReservoir()) {
+        if (u.ext_data) {
+            free(u.ext_data);
+        }
+    }
+
+    mSize = 0;
+}
+
+}  // namespace android
+