Remove unused method OutputMixer::PlayDtmfTone() and infrastructure.

webrtc/voice_engine/dtmf_inband.h

-/*
- *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_VOICE_ENGINE_DTMF_INBAND_H_
-#define WEBRTC_VOICE_ENGINE_DTMF_INBAND_H_
-
-#include "webrtc/typedefs.h"
-#include "webrtc/voice_engine/voice_engine_defines.h"
-#include "webrtc/base/criticalsection.h"
-
-namespace webrtc {
-
-// TODO(solenberg): Used as a DTMF tone generator in voe::OutputMixer. Pull out
-//                  the one in NetEq and use that instead? We don't need several
-//                  implemenations of this.
-class DtmfInband
-{
-public:
-    DtmfInband(int32_t id);
-
-    virtual ~DtmfInband();
-
-    void Init();
-
-    int SetSampleRate(uint16_t frequency);
-
-    int GetSampleRate(uint16_t& frequency);
-
-    int AddTone(uint8_t eventCode,
-                int32_t lengthMs,
-                int32_t attenuationDb);
-
-    int ResetTone();
-    int StartTone(uint8_t eventCode, int32_t attenuationDb);
-
-    int StopTone();
-
-    bool IsAddingTone();
-
-    int Get10msTone(int16_t output[320], uint16_t& outputSizeInSamples);
-
-    uint32_t DelaySinceLastTone() const;
-
-    void UpdateDelaySinceLastTone();
-
-private:
-    void ReInit();
-    int16_t DtmfFix_generate(int16_t* decoded,
-                             int16_t value,
-                             int16_t volume,
-                             int16_t frameLen,
-                             int16_t fs);
-
-private:
-    enum {kDtmfFrameSizeMs = 10};
-    enum {kDtmfAmpHigh = 32768};
-    enum {kDtmfAmpLow  = 23171};        // 3 dB lower than the high frequency
-
-    int16_t DtmfFix_generateSignal(int16_t a1_times2,
-                                   int16_t a2_times2,
-                                   int16_t volume,
-                                   int16_t* signal,
-                                   int16_t length);
-
-private:
-    rtc::CriticalSection _critSect;
-    int32_t _id;
-    uint16_t _outputFrequencyHz;  // {8000, 16000, 32000}
-    int16_t _oldOutputLow[2];     // Data needed for oscillator model
-    int16_t _oldOutputHigh[2];    // Data needed for oscillator model
-    int16_t _frameLengthSamples;  // {80, 160, 320}
-    int32_t _remainingSamples;
-    int16_t _eventCode;           // [0, 15]
-    int16_t _attenuationDb;       // [0, 36]
-    int32_t _lengthMs;
-    bool _reinit;  // 'true' if the oscillator should be reinit for next event
-    bool _playing;
-    uint32_t _delaySinceLastToneMS; // time since last generated tone [ms]
-};
-
-}  // namespace webrtc
-
-#endif // #ifndef WEBRTC_VOICE_ENGINE_DTMF_INBAND_H_