Initial checkin of preliminary support for "http live" streaming in stagefright.

Change-Id: I20399f63d63af86a3ba22641c0e43385a108fb3f

2 files changed, 140 insertions, 0 deletions

diff --git a/media/libstagefright/include/LiveSource.h b/media/libstagefright/include/LiveSource.h
new file mode 100644
index 0000000..3218633
--- /dev/null
+++ b/media/libstagefright/include/LiveSource.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#ifndef LIVE_SOURCE_H_
+
+#define LIVE_SOURCE_H_
+
+#include <media/stagefright/foundation/ABase.h>
+#include <media/stagefright/foundation/AString.h>
+#include <media/stagefright/DataSource.h>
+#include <utils/Vector.h>
+
+namespace android {
+
+struct ABuffer;
+struct HTTPDataSource;
+struct M3UParser;
+
+struct LiveSource : public DataSource {
+    LiveSource(const char *url);
+
+    virtual status_t initCheck() const;
+
+    virtual ssize_t readAt(off_t offset, void *data, size_t size);
+
+    virtual uint32_t flags() {
+        return kWantsPrefetching;
+    }
+
+protected:
+    virtual ~LiveSource();
+
+private:
+    AString mURL;
+    status_t mInitCheck;
+
+    sp<M3UParser> mPlaylist;
+    int32_t mFirstItemSequenceNumber;
+    size_t mPlaylistIndex;
+    int64_t mLastFetchTimeUs;
+
+    sp<HTTPDataSource> mSource;
+    off_t mSourceSize;
+    off_t mOffsetBias;
+
+    status_t fetchM3U(const char *url, sp<ABuffer> *buffer);
+
+    bool switchToNext();
+    bool loadPlaylist();
+
+    DISALLOW_EVIL_CONSTRUCTORS(LiveSource);
+};
+
+}  // namespace android
+
+#endif  // LIVE_SOURCE_H_
diff --git a/media/libstagefright/include/M3UParser.h b/media/libstagefright/include/M3UParser.h
new file mode 100644
index 0000000..36553de
--- /dev/null
+++ b/media/libstagefright/include/M3UParser.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#ifndef M3U_PARSER_H_
+
+#define M3U_PARSER_H_
+
+#include <media/stagefright/foundation/ABase.h>
+#include <media/stagefright/foundation/AMessage.h>
+#include <media/stagefright/foundation/AString.h>
+#include <utils/Vector.h>
+
+namespace android {
+
+struct M3UParser : public RefBase {
+    M3UParser(const char *baseURI, const void *data, size_t size);
+
+    status_t initCheck() const;
+
+    bool isExtM3U() const;
+    bool isVariantPlaylist() const;
+
+    sp<AMessage> meta();
+
+    size_t size();
+    bool itemAt(size_t index, AString *uri, sp<AMessage> *meta = NULL);
+
+protected:
+    virtual ~M3UParser();
+
+private:
+    struct Item {
+        AString mURI;
+        sp<AMessage> mMeta;
+    };
+
+    status_t mInitCheck;
+
+    AString mBaseURI;
+    bool mIsExtM3U;
+    bool mIsVariantPlaylist;
+
+    sp<AMessage> mMeta;
+    Vector<Item> mItems;
+
+    status_t parse(const void *data, size_t size);
+
+    static status_t parseMetaData(
+            const AString &line, sp<AMessage> *meta, const char *key);
+
+    static status_t ParseInt32(const char *s, int32_t *x);
+
+    DISALLOW_EVIL_CONSTRUCTORS(M3UParser);
+};
+
+}  // namespace android
+
+#endif  // M3U_PARSER_H_