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      1 /*
      2  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_POST_DECODE_VAD_H_
     12 #define WEBRTC_MODULES_AUDIO_CODING_NETEQ_POST_DECODE_VAD_H_
     13 
     14 #include <string>  // size_t
     15 
     16 #include "webrtc/base/constructormagic.h"
     17 #include "webrtc/common_audio/vad/include/webrtc_vad.h"
     18 #include "webrtc/common_types.h"  // NULL
     19 #include "webrtc/modules/audio_coding/neteq/defines.h"
     20 #include "webrtc/modules/audio_coding/neteq/interface/audio_decoder.h"
     21 #include "webrtc/modules/audio_coding/neteq/packet.h"
     22 #include "webrtc/typedefs.h"
     23 
     24 namespace webrtc {
     25 
     26 class PostDecodeVad {
     27  public:
     28   PostDecodeVad()
     29       : enabled_(false),
     30         running_(false),
     31         active_speech_(true),
     32         sid_interval_counter_(0),
     33         vad_instance_(NULL) {
     34   }
     35 
     36   virtual ~PostDecodeVad();
     37 
     38   // Enables post-decode VAD.
     39   void Enable();
     40 
     41   // Disables post-decode VAD.
     42   void Disable();
     43 
     44   // Initializes post-decode VAD.
     45   void Init();
     46 
     47   // Updates post-decode VAD with the audio data in |signal| having |length|
     48   // samples. The data is of type |speech_type|, at the sample rate |fs_hz|.
     49   void Update(int16_t* signal, int length,
     50               AudioDecoder::SpeechType speech_type, bool sid_frame, int fs_hz);
     51 
     52   // Accessors.
     53   bool enabled() const { return enabled_; }
     54   bool running() const { return running_; }
     55   bool active_speech() const { return active_speech_; }
     56 
     57  private:
     58   static const int kVadMode = 0;  // Sets aggressiveness to "Normal".
     59   // Number of Update() calls without CNG/SID before re-enabling VAD.
     60   static const int kVadAutoEnable = 3000;
     61 
     62   bool enabled_;
     63   bool running_;
     64   bool active_speech_;
     65   int sid_interval_counter_;
     66   ::VadInst* vad_instance_;
     67 
     68   DISALLOW_COPY_AND_ASSIGN(PostDecodeVad);
     69 };
     70 
     71 }  // namespace webrtc
     72 #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_POST_DECODE_VAD_H_
     73