1 files changed, 110 insertions, 0 deletions
diff --git a/media/libstagefright/ExtendedExtractor.cpp b/media/libstagefright/ExtendedExtractor.cpp
new file mode 100644
index 0000000..8e0d5d7
--- /dev/null
+++ b/media/libstagefright/ExtendedExtractor.cpp
@@ -0,0 +1,110 @@
+/*Copyright (c) 2012, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *      with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *      contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "ExtendedExtractor"
+#include <utils/Log.h>
+#include <dlfcn.h>  // for dlopen/dlclose
+
+#include "include/ExtendedExtractor.h"
+
+static const char* EXTENDED_PARSER_LIB = "libExtendedExtractor.so";
+
+namespace android {
+
+void* ExtendedParserLib() {
+    static void* extendedParserLib = NULL;
+    static bool alreadyTriedToOpenParsers = false;
+
+    if(!alreadyTriedToOpenParsers) {
+        alreadyTriedToOpenParsers = true;
+
+        extendedParserLib = ::dlopen(EXTENDED_PARSER_LIB, RTLD_LAZY);
+
+        if(extendedParserLib == NULL) {
+            ALOGV("Failed to open EXTENDED_PARSER_LIB, dlerror = %s \n", dlerror());
+        }
+    }
+
+    return extendedParserLib;
+}
+
+MediaExtractor* ExtendedExtractor::CreateExtractor(const sp<DataSource> &source, const char *mime) {
+    static MediaExtractorFactory mediaFactoryFunction = NULL;
+    static bool alreadyTriedToFindFactoryFunction = false;
+
+    MediaExtractor* extractor = NULL;
+
+    if(!alreadyTriedToFindFactoryFunction) {
+
+        void *extendedParserLib = ExtendedParserLib();
+        if (extendedParserLib != NULL) {
+
+            mediaFactoryFunction = (MediaExtractorFactory) dlsym(extendedParserLib, MEDIA_CREATE_EXTRACTOR);
+            alreadyTriedToFindFactoryFunction = true;
+        }
+    }
+
+    if(mediaFactoryFunction==NULL) {
+        ALOGE(" dlsym for ExtendedExtractor factory function failed, dlerror = %s \n", dlerror());
+        return NULL;
+    }
+
+    extractor = mediaFactoryFunction(source, mime);
+    if(extractor==NULL) {
+        ALOGE(" ExtendedExtractor failed to instantiate extractor \n");
+    }
+
+    return extractor;
+}
+
+bool SniffExtendedExtractor(const sp<DataSource> &source, String8 *mimeType,
+                            float *confidence,sp<AMessage> *meta) {
+    void *extendedParserLib = ExtendedParserLib();
+    bool retVal = false;
+    if (extendedParserLib != NULL) {
+       ExtendedExtractorSniffers extendedExtractorSniffers=
+           (ExtendedExtractorSniffers) dlsym(extendedParserLib, EXTENDED_EXTRACTOR_SNIFFERS);
+
+       if(extendedExtractorSniffers == NULL) {
+           ALOGE(" dlsym for extendedExtractorSniffers function failed, dlerror = %s \n", dlerror());
+           return retVal;
+       }
+
+       retVal = extendedExtractorSniffers(source, mimeType, confidence, meta);
+
+       if(!retVal) {
+           ALOGV("ExtendedExtractor:: ExtendedExtractorSniffers  Failed");
+       }
+    }
+    return retVal;
+}
+
+}  // namespace android
+
+