f3882571b0
The new version is much shorter than the old one, and hopefully easier to read. This is part of the effort to rewrite the old mixer. NOTRY=True Review-Url: https://codereview.webrtc.org/2132563002 Cr-Commit-Position: refs/heads/master@{#13570}
62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_AUDIO_MIXER_INCLUDE_AUDIO_MIXER_DEFINES_H_
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#define WEBRTC_MODULES_AUDIO_MIXER_INCLUDE_AUDIO_MIXER_DEFINES_H_
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#include "webrtc/base/checks.h"
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#include "webrtc/modules/include/module_common_types.h"
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#include "webrtc/typedefs.h"
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namespace webrtc {
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class NewMixHistory;
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// A callback class that all mixer participants must inherit from/implement.
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class MixerAudioSource {
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public:
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enum class AudioFrameInfo {
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kNormal, // The samples in audio_frame are valid and should be used.
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kMuted, // The samples in audio_frame should not be used, but should be
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// implicitly interpreted as zero. Other fields in audio_frame
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// may be read and should contain meaningful values.
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kError // audio_frame will not be used.
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};
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struct AudioFrameWithMuted {
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AudioFrame* audio_frame;
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AudioFrameInfo audio_frame_info;
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};
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// The implementation of GetAudioFrameWithMuted should update
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// audio_frame with new audio every time it's called. Implementing
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// classes are allowed to return the same AudioFrame pointer on
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// different calls. The pointer must stay valid until the next
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// mixing call or until this audio source is disconnected from the
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// mixer.
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virtual AudioFrameWithMuted GetAudioFrameWithMuted(int32_t id,
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int sample_rate_hz) = 0;
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// Returns true if the participant was mixed this mix iteration.
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bool IsMixed() const;
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// This function specifies the sampling frequency needed for the AudioFrame
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// for future GetAudioFrame(..) calls.
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virtual int32_t NeededFrequency(int32_t id) const = 0;
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NewMixHistory* _mixHistory;
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protected:
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MixerAudioSource();
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virtual ~MixerAudioSource();
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_MIXER_INCLUDE_AUDIO_MIXER_DEFINES_H_
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