- initial import

src/engine/media/MT_Codec.h

@@ -0,0 +1,64 @@
+/* Copyright(C) 2007-2016 VoIP objects (voipobjects.com)
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef __MT_CODEC_H
+#define __MT_CODEC_H
+
+#ifdef USE_RESIP_INTEGRATION
+# include "resiprocate/resip/stack/SdpContents.hxx"
+#endif
+#include "../helper/HL_Types.h"
+#include <map>
+#include "../helper/HL_Pointer.h"
+
+
+namespace MT
+{
+  class Codec;
+  typedef std::shared_ptr<Codec> PCodec;
+
+  class CodecMap: public std::map<int, PCodec>
+  {
+  };
+
+  class Codec
+  {
+  public:
+    class Factory
+    {
+    public:
+      virtual ~Factory() {}
+      virtual const char* name() = 0;
+      virtual int samplerate() = 0;
+      virtual int payloadType() = 0;
+      virtual PCodec create() = 0;
+
+      virtual int channels();
+#ifdef USE_RESIP_INTEGRATION
+      typedef std::map<int, PCodec > CodecMap;
+      virtual void create(CodecMap& codecs);
+      virtual void updateSdp(resip::SdpContents::Session::Medium::CodecContainer& codecs, SdpDirection direction);
+      // Returns payload type from chosen codec if success. -1 is returned for negative result.
+      virtual int processSdp(const resip::SdpContents::Session::Medium::CodecContainer& codecs, SdpDirection direction);
+      resip::Codec resipCodec();
+#endif
+    };
+    virtual ~Codec() {}
+    virtual const char* name() = 0;
+    virtual int samplerate() = 0;
+    virtual float timestampUnit() { return float(1.0 / samplerate()); }
+    virtual int pcmLength() = 0;
+    virtual int frameTime() = 0;
+    virtual int rtpLength() = 0;
+    virtual int channels() { return 1; }
+    virtual int encode(const void* input, int inputBytes, void* output, int outputCapacity) = 0;
+    virtual int decode(const void* input, int inputBytes, void* output, int outputCapacity) = 0;
+    virtual int plc(int lostFrames, void* output, int outputCapacity) = 0;
+
+    // Returns size of codec in memory
+    virtual int getSize() const { return 0; };
+  };
+}
+#endif