Remove voe::OutputMixer and AudioConferenceMixer.

modules/audio_conference_mixer/include/audio_conference_mixer_defines.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 MODULES_AUDIO_CONFERENCE_MIXER_INCLUDE_AUDIO_CONFERENCE_MIXER_DEFINES_H_
-#define MODULES_AUDIO_CONFERENCE_MIXER_INCLUDE_AUDIO_CONFERENCE_MIXER_DEFINES_H_
-
-#include "modules/include/module_common_types.h"
-#include "rtc_base/checks.h"
-#include "typedefs.h"  // NOLINT(build/include)
-
-namespace webrtc {
-class MixHistory;
-
-// A callback class that all mixer participants must inherit from/implement.
-class MixerParticipant
-{
-public:
-    // The implementation of this function should update audioFrame with new
-    // audio every time it's called.
-    //
-    // If it returns -1, the frame will not be added to the mix.
-    //
-    // NOTE: This function should not be called. It will remain for a short
-    // time so that subclasses can override it without getting warnings.
-    // TODO(henrik.lundin) Remove this function.
-    virtual int32_t GetAudioFrame(int32_t id,
-                                  AudioFrame* audioFrame) {
-      RTC_CHECK(false);
-      return -1;
-    }
-
-
-    // The implementation of GetAudioFrameWithMuted should update audio_frame
-    // with new audio every time it's called. The return value will be
-    // interpreted as follows.
-    enum class AudioFrameInfo {
-      kNormal,  // The samples in audio_frame are valid and should be used.
-      kMuted,   // The samples in audio_frame should not be used, but should be
-                // implicitly interpreted as zero. Other fields in audio_frame
-                // may be read and should contain meaningful values.
-      kError    // audio_frame will not be used.
-    };
-
-    virtual AudioFrameInfo GetAudioFrameWithMuted(int32_t id,
-                                                  AudioFrame* audio_frame) {
-      return GetAudioFrame(id, audio_frame) == -1 ?
-          AudioFrameInfo::kError :
-          AudioFrameInfo::kNormal;
-    }
-
-    // Returns true if the participant was mixed this mix iteration.
-    bool IsMixed() const;
-
-    // This function specifies the sampling frequency needed for the AudioFrame
-    // for future GetAudioFrame(..) calls.
-    virtual int32_t NeededFrequency(int32_t id) const = 0;
-
-    MixHistory* _mixHistory;
-protected:
-    MixerParticipant();
-    virtual ~MixerParticipant();
-};
-
-class AudioMixerOutputReceiver
-{
-public:
-    // This callback function provides the mixed audio for this mix iteration.
-    // Note that uniqueAudioFrames is an array of AudioFrame pointers with the
-    // size according to the size parameter.
-    virtual void NewMixedAudio(const int32_t id,
-                               const AudioFrame& generalAudioFrame,
-                               const AudioFrame** uniqueAudioFrames,
-                               const uint32_t size) = 0;
-protected:
-    AudioMixerOutputReceiver() {}
-    virtual ~AudioMixerOutputReceiver() {}
-};
-}  // namespace webrtc
-
-#endif // MODULES_AUDIO_CONFERENCE_MIXER_INCLUDE_AUDIO_CONFERENCE_MIXER_DEFINES_H_