1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* Copyright 2021 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.
*/
#define LOG_TAG "BTAudioProviderSessionCodecsDB_2_2"
#include "BluetoothAudioSupportedCodecsDB_2_2.h"
#include <android-base/logging.h>
namespace android {
namespace bluetooth {
namespace audio {
using ::android::hardware::bluetooth::audio::V2_0::BitsPerSample;
using ::android::hardware::bluetooth::audio::V2_1::CodecType;
using ::android::hardware::bluetooth::audio::V2_1::Lc3FrameDuration;
using ::android::hardware::bluetooth::audio::V2_1::Lc3Parameters;
using ::android::hardware::bluetooth::audio::V2_1::SampleRate;
using ::android::hardware::bluetooth::audio::V2_2::AudioLocation;
using ::android::hardware::bluetooth::audio::V2_2::BroadcastCapability;
using ::android::hardware::bluetooth::audio::V2_2::
LeAudioCodecCapabilitiesSetting;
using ::android::hardware::bluetooth::audio::V2_2::UnicastCapability;
using SessionType_2_1 =
::android::hardware::bluetooth::audio::V2_1::SessionType;
// Stores the list of offload supported capability
std::vector<LeAudioCodecCapabilitiesSetting> kDefaultOffloadLeAudioCapabilities;
static const UnicastCapability kInvalidUnicastCapability = {
.codecType = CodecType::UNKNOWN};
static const BroadcastCapability kInvalidBroadcastCapability = {
.codecType = CodecType::UNKNOWN};
// Default Supported Codecs
// LC3 16_1: sample rate: 16 kHz, frame duration: 7.5 ms, octets per frame: 30
static const Lc3Parameters kLc3Capability_16_1 = {
.samplingFrequency = SampleRate::RATE_16000,
.frameDuration = Lc3FrameDuration::DURATION_7500US,
.octetsPerFrame = 30};
// Default Supported Codecs
// LC3 16_2: sample rate: 16 kHz, frame duration: 10 ms, octets per frame: 40
static const Lc3Parameters kLc3Capability_16_2 = {
.samplingFrequency = SampleRate::RATE_16000,
.frameDuration = Lc3FrameDuration::DURATION_10000US,
.octetsPerFrame = 40};
// Default Supported Codecs
// LC3 48_4: sample rate: 48 kHz, frame duration: 10 ms, octets per frame: 120
static const Lc3Parameters kLc3Capability_48_4 = {
.samplingFrequency = SampleRate::RATE_48000,
.frameDuration = Lc3FrameDuration::DURATION_10000US,
.octetsPerFrame = 120};
static const std::vector<Lc3Parameters> supportedLc3CapabilityList = {
kLc3Capability_48_4, kLc3Capability_16_2, kLc3Capability_16_1};
static AudioLocation stereoAudio = static_cast<AudioLocation>(
AudioLocation::FRONT_LEFT | AudioLocation::FRONT_RIGHT);
static AudioLocation monoAudio = AudioLocation::UNKNOWN;
// Stores the supported setting of audio location, connected device, and the
// channel count for each device
std::vector<std::tuple<AudioLocation, uint8_t, uint8_t>>
supportedDeviceSetting = {std::make_tuple(stereoAudio, 2, 1),
std::make_tuple(monoAudio, 1, 2),
std::make_tuple(monoAudio, 1, 1)};
bool IsOffloadLeAudioConfigurationValid(
const ::android::hardware::bluetooth::audio::V2_1::SessionType&
session_type,
const ::android::hardware::bluetooth::audio::V2_2::LeAudioConfiguration&) {
if (session_type !=
SessionType_2_1::LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH &&
session_type !=
SessionType_2_1::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH) {
return false;
}
// TODO: perform checks on le_audio_codec_config once we know supported
// parameters
return true;
}
UnicastCapability composeUnicastLc3Capability(AudioLocation audioLocation,
uint8_t deviceCnt,
uint8_t channelCount,
Lc3Parameters capability) {
return UnicastCapability{.codecType = CodecType::LC3,
.supportedChannel = audioLocation,
.deviceCount = deviceCnt,
.channelCountPerDevice = channelCount,
.capabilities = capability};
}
std::vector<LeAudioCodecCapabilitiesSetting> GetLeAudioOffloadCodecCapabilities(
const SessionType_2_1& session_type) {
if (session_type !=
SessionType_2_1::LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH &&
session_type !=
SessionType_2_1::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH) {
return std::vector<LeAudioCodecCapabilitiesSetting>(0);
}
if (kDefaultOffloadLeAudioCapabilities.empty()) {
for (auto [audioLocation, deviceCnt, channelCount] :
supportedDeviceSetting) {
for (auto capability : supportedLc3CapabilityList) {
UnicastCapability lc3Capability = composeUnicastLc3Capability(
audioLocation, deviceCnt, channelCount, capability);
UnicastCapability lc3MonoDecodeCapability =
composeUnicastLc3Capability(monoAudio, 1, 1, capability);
// Adds the capability for encode only
kDefaultOffloadLeAudioCapabilities.push_back(
{.unicastEncodeCapability = lc3Capability,
.unicastDecodeCapability = kInvalidUnicastCapability,
.broadcastCapability = kInvalidBroadcastCapability});
// Adds the capability for decode only
kDefaultOffloadLeAudioCapabilities.push_back(
{.unicastEncodeCapability = kInvalidUnicastCapability,
.unicastDecodeCapability = lc3Capability,
.broadcastCapability = kInvalidBroadcastCapability});
// Adds the capability for the case that encode and decode exist at the
// same time
kDefaultOffloadLeAudioCapabilities.push_back(
{.unicastEncodeCapability = lc3Capability,
.unicastDecodeCapability = lc3MonoDecodeCapability,
.broadcastCapability = kInvalidBroadcastCapability});
}
}
}
return kDefaultOffloadLeAudioCapabilities;
}
} // namespace audio
} // namespace bluetooth
} // namespace android
|
