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/*
* Copyright 2019 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.
*/
#pragma once
#include <hardware/audio.h>
#include <system/audio.h>
#include <list>
#include "device_port_proxy.h"
#include "device_port_proxy_hidl.h"
constexpr unsigned int kBluetoothDefaultSampleRate = 44100;
constexpr audio_format_t kBluetoothDefaultAudioFormatBitsPerSample =
AUDIO_FORMAT_PCM_16_BIT;
constexpr unsigned int kBluetoothDefaultInputBufferMs = 20;
constexpr unsigned int kBluetoothDefaultInputStateTimeoutMs = 20;
constexpr unsigned int kBluetoothDefaultOutputBufferMs = 10;
constexpr unsigned int kBluetoothSpatializerOutputBufferMs = 10;
constexpr audio_channel_mask_t kBluetoothDefaultOutputChannelModeMask =
AUDIO_CHANNEL_OUT_STEREO;
constexpr audio_channel_mask_t kBluetoothDefaultInputChannelModeMask =
AUDIO_CHANNEL_IN_MONO;
enum class BluetoothStreamState : uint8_t {
DISABLED = 0, // This stream is closing or set param "suspend=true"
STANDBY,
STARTING,
STARTED,
SUSPENDING,
UNKNOWN,
};
std::ostream& operator<<(std::ostream& os, const BluetoothStreamState& state);
struct BluetoothStreamOut {
// Must be the first member so it can be cast from audio_stream
// or audio_stream_out pointer
audio_stream_out stream_out_{};
std::unique_ptr<::android::bluetooth::audio::BluetoothAudioPort>
bluetooth_output_;
bool is_aidl;
int64_t last_write_time_us_;
// Audio PCM Configs
uint32_t sample_rate_;
audio_channel_mask_t channel_mask_;
audio_format_t format_;
size_t preferred_data_interval_us;
// frame is the number of samples per channel
// frames count per tick
size_t frames_count_;
// total frames written, reset on standby
uint64_t frames_rendered_;
// total frames written after opened, never reset
uint64_t frames_presented_;
mutable std::mutex mutex_;
};
struct BluetoothAudioDevice {
// Important: device must be first as an audio_hw_device* may be cast to
// BluetoothAudioDevice* when the type is implicitly known.
audio_hw_device audio_device_{};
// protect against device->output and stream_out from being inconsistent
std::mutex mutex_;
std::list<BluetoothStreamOut*> opened_stream_outs_ =
std::list<BluetoothStreamOut*>(0);
};
struct BluetoothStreamIn {
// Must be the first member so it can be cast from audio_stream
// or audio_stream_in pointer
audio_stream_in stream_in_;
std::unique_ptr<::android::bluetooth::audio::BluetoothAudioPort>
bluetooth_input_;
bool is_aidl;
int64_t last_read_time_us_;
// Audio PCM Configs
uint32_t sample_rate_;
audio_channel_mask_t channel_mask_;
audio_format_t format_;
size_t preferred_data_interval_us;
// frame is the number of samples per channel
// frames count per tick
size_t frames_count_;
// total frames read after opened, never reset
uint64_t frames_presented_;
mutable std::mutex mutex_;
};
int adev_open_output_stream(struct audio_hw_device* dev,
audio_io_handle_t handle, audio_devices_t devices,
audio_output_flags_t flags,
struct audio_config* config,
struct audio_stream_out** stream_out,
const char* address __unused);
void adev_close_output_stream(struct audio_hw_device* dev,
struct audio_stream_out* stream);
size_t adev_get_input_buffer_size(const struct audio_hw_device* dev,
const struct audio_config* config);
int adev_open_input_stream(struct audio_hw_device* dev,
audio_io_handle_t handle, audio_devices_t devices,
struct audio_config* config,
struct audio_stream_in** stream_in,
audio_input_flags_t flags __unused,
const char* address __unused,
audio_source_t source __unused);
void adev_close_input_stream(struct audio_hw_device* dev,
struct audio_stream_in* in);
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