Initial checkin of support for acting as a wifi display source

Change-Id: I08f17efa0c7d007e17408feb7d4fbef0a19f531a

1 files changed, 76 insertions, 0 deletions

diff --git a/media/libstagefright/wifi-display/source/TSPacketizer.h b/media/libstagefright/wifi-display/source/TSPacketizer.h
new file mode 100644
index 0000000..9dbeb27
--- /dev/null
+++ b/media/libstagefright/wifi-display/source/TSPacketizer.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2012, 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 TS_PACKETIZER_H_
+
+#define TS_PACKETIZER_H_
+
+#include <media/stagefright/foundation/ABase.h>
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/Vector.h>
+
+namespace android {
+
+struct ABuffer;
+struct AMessage;
+
+// Forms the packets of a transport stream given access units.
+// Emits metadata tables (PAT and PMT) and timestamp stream (PCR) based
+// on flags.
+struct TSPacketizer : public RefBase {
+    TSPacketizer();
+
+    // Returns trackIndex or error.
+    ssize_t addTrack(const sp<AMessage> &format);
+
+    enum {
+        EMIT_PAT_AND_PMT = 1,
+        EMIT_PCR         = 2,
+    };
+    status_t packetize(
+            size_t trackIndex, const sp<ABuffer> &accessUnit,
+            sp<ABuffer> *packets,
+            uint32_t flags);
+
+protected:
+    virtual ~TSPacketizer();
+
+private:
+    enum {
+        kPID_PMT = 0x100,
+        kPID_PCR = 0x1000,
+    };
+
+    struct Track;
+
+    Vector<sp<Track> > mTracks;
+
+    unsigned mPATContinuityCounter;
+    unsigned mPMTContinuityCounter;
+
+    uint32_t mCrcTable[256];
+
+    void initCrcTable();
+    uint32_t crc32(const uint8_t *start, size_t size) const;
+
+    DISALLOW_EVIL_CONSTRUCTORS(TSPacketizer);
+};
+
+}  // namespace android
+
+#endif  // TS_PACKETIZER_H_
+