110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
/*
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* Copyright 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <functional>
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#include "common/message_loop_thread.h"
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namespace bluetooth {
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namespace audio {
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namespace le_audio {
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struct StreamCallbacks {
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std::function<bool(bool start_media_task)> on_resume_;
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std::function<bool(void)> on_suspend_;
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};
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class LeAudioClientInterface {
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public:
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struct PcmParameters {
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uint32_t data_interval_us;
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uint32_t sample_rate;
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uint8_t bits_per_sample;
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uint8_t channels_count;
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};
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private:
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class IClientInterfaceEndpoint {
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public:
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virtual ~IClientInterfaceEndpoint() = default;
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virtual void Cleanup() = 0;
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virtual void SetPcmParameters(const PcmParameters& params) = 0;
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virtual void SetRemoteDelay(uint16_t delay_report_ms) = 0;
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virtual void StartSession() = 0;
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virtual void StopSession() = 0;
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};
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public:
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class Sink : public IClientInterfaceEndpoint {
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public:
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virtual ~Sink() = default;
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void Cleanup() override;
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void SetPcmParameters(const PcmParameters& params) override;
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void SetRemoteDelay(uint16_t delay_report_ms) override;
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void StartSession() override;
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void StopSession() override;
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// Read the stream of bytes sinked to us by the upper layers
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size_t Read(uint8_t* p_buf, uint32_t len);
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};
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class Source : public IClientInterfaceEndpoint {
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public:
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virtual ~Source() = default;
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void Cleanup() override;
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void SetPcmParameters(const PcmParameters& params) override;
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void SetRemoteDelay(uint16_t delay_report_ms) override;
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void StartSession() override;
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void StopSession() override;
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// Source the given stream of bytes to be sinked into the upper layers
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size_t Write(const uint8_t* p_buf, uint32_t len);
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};
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// Get LE Audio sink client interface if it's not previously acquired and not
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// yet released.
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Sink* GetSink(StreamCallbacks stream_cb,
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bluetooth::common::MessageLoopThread* message_loop);
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// This should be called before trying to get sink interface
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bool IsSinkAcquired();
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// Release sink interface if belongs to LE audio client interface
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bool ReleaseSink(Sink* sink);
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// Get LE Audio source client interface if it's not previously acquired and
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// not yet released.
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Source* GetSource(StreamCallbacks stream_cb,
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bluetooth::common::MessageLoopThread* message_loop);
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// This should be called before trying to get source interface
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bool IsSourceAcquired();
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// Release source interface if belongs to LE audio client interface
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bool ReleaseSource(Source* source);
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// Get interface, if previously not initialized - it'll initialize singleton.
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static LeAudioClientInterface* Get();
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private:
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static LeAudioClientInterface* interface;
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Sink* sink_ = nullptr;
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Source* source_ = nullptr;
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};
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} // namespace le_audio
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} // namespace audio
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} // namespace bluetooth
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