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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_AUDIO_MMAP_STREAM_CALLBACK_H
#define ANDROID_AUDIO_MMAP_STREAM_CALLBACK_H
#include <system/audio.h>
#include <utils/Errors.h>
#include <utils/RefBase.h>
namespace android {
class MmapStreamCallback : public virtual RefBase {
public:
/**
* The mmap stream should be torn down because conditions that permitted its creation with
* the requested parameters have changed and do not allow it to operate with the requested
* constraints any more.
* \param[in] handle handle for the client stream to tear down.
*/
virtual void onTearDown(audio_port_handle_t handle) = 0;
/**
* The volume to be applied to the use case specified when opening the stream has changed
* \param[in] channels a channel mask containing all channels the volume should be applied to.
* \param[in] values the volume values to be applied to each channel. The size of the vector
* should correspond to the channel count retrieved with
* audio_channel_count_from_in_mask() or audio_channel_count_from_out_mask()
*/
virtual void onVolumeChanged(audio_channel_mask_t channels, Vector<float> values) = 0;
/**
* The device the stream is routed to/from has changed
* \param[in] onRoutingChanged the unique device ID of the new device.
*/
virtual void onRoutingChanged(audio_port_handle_t deviceId) = 0;
protected:
MmapStreamCallback() {}
virtual ~MmapStreamCallback() {}
};
} // namespace android
#endif // ANDROID_AUDIO_MMAP_STREAM_CALLBACK_H