1 files changed, 76 insertions, 0 deletions
diff --git a/media/libstagefright/DataSource.cpp b/media/libstagefright/DataSource.cpp
new file mode 100644
index 0000000..6e6b43d
--- /dev/null
+++ b/media/libstagefright/DataSource.cpp
@@ -0,0 +1,76 @@
+/*
+ * 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 <media/stagefright/DataSource.h>
+#include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/MP3Extractor.h>
+#include <media/stagefright/MPEG4Extractor.h>
+#include <utils/String8.h>
+
+namespace android {
+
+status_t DataSource::getSize(off_t *size) {
+    *size = 0;
+
+    return ERROR_UNSUPPORTED;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+Mutex DataSource::gSnifferMutex;
+List<DataSource::SnifferFunc> DataSource::gSniffers;
+
+bool DataSource::sniff(String8 *mimeType, float *confidence) {
+    *mimeType = "";
+    *confidence = 0.0f;
+
+    Mutex::Autolock autoLock(gSnifferMutex);
+    for (List<SnifferFunc>::iterator it = gSniffers.begin();
+         it != gSniffers.end(); ++it) {
+        String8 newMimeType;
+        float newConfidence;
+        if ((*it)(this, &newMimeType, &newConfidence)) {
+            if (newConfidence > *confidence) {
+                *mimeType = newMimeType;
+                *confidence = newConfidence;
+            }
+        }
+    }
+
+    return *confidence > 0.0;
+}
+
+// static
+void DataSource::RegisterSniffer(SnifferFunc func) {
+    Mutex::Autolock autoLock(gSnifferMutex);
+
+    for (List<SnifferFunc>::iterator it = gSniffers.begin();
+         it != gSniffers.end(); ++it) {
+        if (*it == func) {
+            return;
+        }
+    }
+
+    gSniffers.push_back(func);
+}
+
+// static
+void DataSource::RegisterDefaultSniffers() {
+    RegisterSniffer(SniffMP3);
+    RegisterSniffer(SniffMPEG4);
+}
+
+}  // namespace android