/*
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* Copyright 2019 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 <hardware/audio.h>
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#include <system/audio.h>
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#include "device_port_proxy.h"
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constexpr unsigned int kBluetoothDefaultSampleRate = 44100;
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constexpr audio_format_t kBluetoothDefaultAudioFormatBitsPerSample =
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AUDIO_FORMAT_PCM_16_BIT;
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constexpr unsigned int kBluetoothDefaultInputBufferMs = 20;
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constexpr unsigned int kBluetoothDefaultOutputBufferMs = 10;
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constexpr audio_channel_mask_t kBluetoothDefaultOutputChannelModeMask =
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AUDIO_CHANNEL_OUT_STEREO;
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enum class BluetoothStreamState : uint8_t {
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DISABLED = 0, // This stream is closing or set param "suspend=true"
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STANDBY,
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STARTING,
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STARTED,
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SUSPENDING,
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UNKNOWN,
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};
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std::ostream& operator<<(std::ostream& os, const BluetoothStreamState& state);
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struct BluetoothStreamOut {
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// Must be the first member so it can be cast from audio_stream
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// or audio_stream_out pointer
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audio_stream_out stream_out_;
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::android::bluetooth::audio::BluetoothAudioPortOut bluetooth_output_;
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int64_t last_write_time_us_;
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// Audio PCM Configs
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uint32_t sample_rate_;
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audio_channel_mask_t channel_mask_;
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audio_format_t format_;
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// frame is the number of samples per channel
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// frames count per tick
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size_t frames_count_;
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// total frames written, reset on standby
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uint64_t frames_rendered_;
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// total frames written after opened, never reset
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uint64_t frames_presented_;
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mutable std::mutex mutex_;
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};
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int adev_open_output_stream(struct audio_hw_device* dev,
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audio_io_handle_t handle, audio_devices_t devices,
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audio_output_flags_t flags,
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struct audio_config* config,
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struct audio_stream_out** stream_out,
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const char* address __unused);
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void adev_close_output_stream(struct audio_hw_device* dev,
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struct audio_stream_out* stream);
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size_t adev_get_input_buffer_size(const struct audio_hw_device* dev,
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const struct audio_config* config);
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int adev_open_input_stream(struct audio_hw_device* dev,
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audio_io_handle_t handle, audio_devices_t devices,
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struct audio_config* config,
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struct audio_stream_in** stream_in,
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audio_input_flags_t flags __unused,
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const char* address __unused,
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audio_source_t source __unused);
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void adev_close_input_stream(struct audio_hw_device* dev,
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struct audio_stream_in* in);
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