From 4bbfff2dbf3968c267c3b2ea9f8912a38372a9da Mon Sep 17 00:00:00 2001
From: Andreas Huber <andih@google.com>
Date: Mon, 10 Feb 2014 14:40:45 -0800
Subject: Support "data:" URIs again in mediaplayer...

Change-Id: I6dac35c7e606f738a60f985f6dca977dc92c82a4
related-to-bug: 12957757
---
 media/libstagefright/DataURISource.cpp | 109 +++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 media/libstagefright/DataURISource.cpp

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

diff --git a/media/libstagefright/DataURISource.cpp b/media/libstagefright/DataURISource.cpp
new file mode 100644
index 0000000..377bc85
--- /dev/null
+++ b/media/libstagefright/DataURISource.cpp
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2014 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 <media/stagefright/DataURISource.h>
+
+#include <media/stagefright/foundation/ABuffer.h>
+#include <media/stagefright/foundation/AString.h>
+#include <media/stagefright/foundation/base64.h>
+
+namespace android {
+
+// static
+sp<DataURISource> DataURISource::Create(const char *uri) {
+    if (strncasecmp("data:", uri, 5)) {
+        return NULL;
+    }
+
+    char *commaPos = strrchr(uri, ',');
+
+    if (commaPos == NULL) {
+        return NULL;
+    }
+
+    sp<ABuffer> buffer;
+
+    AString tmp(&uri[5], commaPos - &uri[5]);
+
+    if (tmp.endsWith(";base64")) {
+        AString encoded(commaPos + 1);
+
+        // Strip CR and LF...
+        for (size_t i = encoded.size(); i-- > 0;) {
+            if (encoded.c_str()[i] == '\r' || encoded.c_str()[i] == '\n') {
+                encoded.erase(i, 1);
+            }
+        }
+
+        buffer = decodeBase64(encoded);
+
+        if (buffer == NULL) {
+            ALOGE("Malformed base64 encoded content found.");
+            return NULL;
+        }
+    } else {
+#if 0
+        size_t dataLen = strlen(uri) - tmp.size() - 6;
+        buffer = new ABuffer(dataLen);
+        memcpy(buffer->data(), commaPos + 1, dataLen);
+
+        // unescape
+#else
+        // MediaPlayer doesn't care for this right now as we don't
+        // play any text-based media.
+        return NULL;
+#endif
+    }
+
+    // We don't really care about charset or mime type.
+
+    return new DataURISource(buffer);
+}
+
+DataURISource::DataURISource(const sp<ABuffer> &buffer)
+    : mBuffer(buffer) {
+}
+
+DataURISource::~DataURISource() {
+}
+
+status_t DataURISource::initCheck() const {
+    return OK;
+}
+
+ssize_t DataURISource::readAt(off64_t offset, void *data, size_t size) {
+    if (offset >= mBuffer->size()) {
+        return 0;
+    }
+
+    size_t copy = mBuffer->size() - offset;
+    if (copy > size) {
+        copy = size;
+    }
+
+    memcpy(data, mBuffer->data() + offset, copy);
+
+    return copy;
+}
+
+status_t DataURISource::getSize(off64_t *size) {
+    *size = mBuffer->size();
+
+    return OK;
+}
+
+}  // namespace android
+
-- 
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