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      1 /*
      2  * libjingle
      3  * Copyright 2004 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_MEDIA_BASE_VOICEPROCESSOR_H_
     29 #define TALK_MEDIA_BASE_VOICEPROCESSOR_H_
     30 
     31 #include "talk/media/base/audioframe.h"
     32 #include "webrtc/base/basictypes.h"
     33 #include "webrtc/base/sigslot.h"
     34 
     35 namespace cricket {
     36 
     37 enum MediaProcessorDirection {
     38     MPD_INVALID = 0,
     39     MPD_RX = 1 << 0,
     40     MPD_TX = 1 << 1,
     41     MPD_RX_AND_TX = MPD_RX | MPD_TX,
     42 };
     43 
     44 class VoiceProcessor : public sigslot::has_slots<> {
     45  public:
     46   virtual ~VoiceProcessor() {}
     47   // Contents of frame may be manipulated by the processor.
     48   // The processed data is expected to be the same size as the
     49   // original data.
     50   virtual void OnFrame(uint32 ssrc,
     51                        MediaProcessorDirection direction,
     52                        AudioFrame* frame) = 0;
     53 };
     54 
     55 }  // namespace cricket
     56 #endif  // TALK_MEDIA_BASE_VOICEPROCESSOR_H_
     57