1 /*
2  * Copyright 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #define LOG_TAG "BTAudioProviderSessionCodecsDB"
18 
19 #include "BluetoothAudioSupportedCodecsDB.h"
20 
21 #include <android-base/logging.h>
22 
23 namespace android {
24 namespace bluetooth {
25 namespace audio {
26 
27 using ::android::hardware::bluetooth::audio::V2_0::AacObjectType;
28 using ::android::hardware::bluetooth::audio::V2_0::AacParameters;
29 using ::android::hardware::bluetooth::audio::V2_0::AacVariableBitRate;
30 using ::android::hardware::bluetooth::audio::V2_0::AptxParameters;
31 using ::android::hardware::bluetooth::audio::V2_0::BitsPerSample;
32 using ::android::hardware::bluetooth::audio::V2_0::ChannelMode;
33 using ::android::hardware::bluetooth::audio::V2_0::CodecType;
34 using ::android::hardware::bluetooth::audio::V2_0::LdacChannelMode;
35 using ::android::hardware::bluetooth::audio::V2_0::LdacParameters;
36 using ::android::hardware::bluetooth::audio::V2_0::LdacQualityIndex;
37 using ::android::hardware::bluetooth::audio::V2_0::SampleRate;
38 using ::android::hardware::bluetooth::audio::V2_0::SbcAllocMethod;
39 using ::android::hardware::bluetooth::audio::V2_0::SbcBlockLength;
40 using ::android::hardware::bluetooth::audio::V2_0::SbcChannelMode;
41 using ::android::hardware::bluetooth::audio::V2_0::SbcNumSubbands;
42 using ::android::hardware::bluetooth::audio::V2_0::SbcParameters;
43 
44 // Default Supported PCM Parameters
45 static const PcmParameters kDefaultSoftwarePcmCapabilities = {
46     .sampleRate = static_cast<SampleRate>(
47         SampleRate::RATE_44100 | SampleRate::RATE_48000 |
48         SampleRate::RATE_88200 | SampleRate::RATE_96000 |
49         SampleRate::RATE_16000 | SampleRate::RATE_24000),
50     .channelMode =
51         static_cast<ChannelMode>(ChannelMode::MONO | ChannelMode::STEREO),
52     .bitsPerSample = static_cast<BitsPerSample>(BitsPerSample::BITS_16 |
53                                                 BitsPerSample::BITS_24 |
54                                                 BitsPerSample::BITS_32)};
55 
56 // Default Supported Codecs
57 // SBC: mSampleRate:(44100), mBitsPerSample:(16), mChannelMode:(MONO|STEREO)
58 //      all blocks | subbands 8 | Loudness
59 static const SbcParameters kDefaultOffloadSbcCapability = {
60     .sampleRate = SampleRate::RATE_44100,
61     .channelMode = static_cast<SbcChannelMode>(SbcChannelMode::MONO |
62                                                SbcChannelMode::JOINT_STEREO),
63     .blockLength = static_cast<SbcBlockLength>(
64         SbcBlockLength::BLOCKS_4 | SbcBlockLength::BLOCKS_8 |
65         SbcBlockLength::BLOCKS_12 | SbcBlockLength::BLOCKS_16),
66     .numSubbands = SbcNumSubbands::SUBBAND_8,
67     .allocMethod = SbcAllocMethod::ALLOC_MD_L,
68     .bitsPerSample = BitsPerSample::BITS_16,
69     .minBitpool = 2,
70     .maxBitpool = 53};
71 
72 // AAC: mSampleRate:(44100), mBitsPerSample:(16), mChannelMode:(STEREO)
73 static const AacParameters kDefaultOffloadAacCapability = {
74     .objectType = AacObjectType::MPEG2_LC,
75     .sampleRate = SampleRate::RATE_44100,
76     .channelMode = ChannelMode::STEREO,
77     .variableBitRateEnabled = AacVariableBitRate::DISABLED,
78     .bitsPerSample = BitsPerSample::BITS_16};
79 
80 // LDAC: mSampleRate:(44100|48000|88200|96000), mBitsPerSample:(16|24|32),
81 //       mChannelMode:(DUAL|STEREO)
82 static const LdacParameters kDefaultOffloadLdacCapability = {
83     .sampleRate = static_cast<SampleRate>(
84         SampleRate::RATE_44100 | SampleRate::RATE_48000 |
85         SampleRate::RATE_88200 | SampleRate::RATE_96000),
86     .channelMode = static_cast<LdacChannelMode>(LdacChannelMode::DUAL |
87                                                 LdacChannelMode::STEREO),
88     .qualityIndex = LdacQualityIndex::QUALITY_HIGH,
89     .bitsPerSample = static_cast<BitsPerSample>(BitsPerSample::BITS_16 |
90                                                 BitsPerSample::BITS_24 |
91                                                 BitsPerSample::BITS_32)};
92 
93 // aptX: mSampleRate:(44100|48000), mBitsPerSample:(16), mChannelMode:(STEREO)
94 static const AptxParameters kDefaultOffloadAptxCapability = {
95     .sampleRate = static_cast<SampleRate>(SampleRate::RATE_44100 |
96                                           SampleRate::RATE_48000),
97     .channelMode = ChannelMode::STEREO,
98     .bitsPerSample = BitsPerSample::BITS_16,
99 };
100 
101 // aptX HD: mSampleRate:(44100|48000), mBitsPerSample:(24),
102 //          mChannelMode:(STEREO)
103 static const AptxParameters kDefaultOffloadAptxHdCapability = {
104     .sampleRate = static_cast<SampleRate>(SampleRate::RATE_44100 |
105                                           SampleRate::RATE_48000),
106     .channelMode = ChannelMode::STEREO,
107     .bitsPerSample = BitsPerSample::BITS_24,
108 };
109 
110 const std::vector<CodecCapabilities> kDefaultOffloadA2dpCodecCapabilities = {
111     {.codecType = CodecType::SBC, .capabilities = {}},
112     {.codecType = CodecType::AAC, .capabilities = {}},
113     {.codecType = CodecType::LDAC, .capabilities = {}},
114     {.codecType = CodecType::APTX, .capabilities = {}},
115     {.codecType = CodecType::APTX_HD, .capabilities = {}}};
116 
IsSingleBit(uint32_t bitmasks,uint32_t bitfield)117 static bool IsSingleBit(uint32_t bitmasks, uint32_t bitfield) {
118   bool single = false;
119   uint32_t test_bit = 0x00000001;
120   while (test_bit <= bitmasks && test_bit <= bitfield) {
121     if (bitfield & test_bit && bitmasks & test_bit) {
122       if (single) return false;
123       single = true;
124     }
125     if (test_bit == 0x80000000) break;
126     test_bit <<= 1;
127   }
128   return single;
129 }
130 
131 static bool IsOffloadSbcConfigurationValid(
132     const CodecConfiguration::CodecSpecific& codec_specific);
133 static bool IsOffloadAacConfigurationValid(
134     const CodecConfiguration::CodecSpecific& codec_specific);
135 static bool IsOffloadLdacConfigurationValid(
136     const CodecConfiguration::CodecSpecific& codec_specific);
137 static bool IsOffloadAptxConfigurationValid(
138     const CodecConfiguration::CodecSpecific& codec_specific);
139 static bool IsOffloadAptxHdConfigurationValid(
140     const CodecConfiguration::CodecSpecific& codec_specific);
141 
IsOffloadSbcConfigurationValid(const CodecConfiguration::CodecSpecific & codec_specific)142 static bool IsOffloadSbcConfigurationValid(
143     const CodecConfiguration::CodecSpecific& codec_specific) {
144   if (codec_specific.getDiscriminator() !=
145       CodecConfiguration::CodecSpecific::hidl_discriminator::sbcConfig) {
146     LOG(WARNING) << __func__
147                  << ": Invalid CodecSpecific=" << toString(codec_specific);
148     return false;
149   }
150   const SbcParameters sbc_data = codec_specific.sbcConfig();
151   if (!IsSingleBit(static_cast<uint32_t>(sbc_data.sampleRate), 0xff) ||
152       !IsSingleBit(static_cast<uint32_t>(sbc_data.channelMode), 0x0f) ||
153       !IsSingleBit(static_cast<uint32_t>(sbc_data.blockLength), 0xf0) ||
154       !IsSingleBit(static_cast<uint32_t>(sbc_data.numSubbands), 0x0c) ||
155       !IsSingleBit(static_cast<uint32_t>(sbc_data.allocMethod), 0x03) ||
156       !IsSingleBit(static_cast<uint32_t>(sbc_data.bitsPerSample), 0x07) ||
157       sbc_data.minBitpool > sbc_data.maxBitpool) {
158     LOG(WARNING) << __func__
159                  << ": Invalid CodecSpecific=" << toString(codec_specific);
160     return false;
161   } else if ((sbc_data.sampleRate & kDefaultOffloadSbcCapability.sampleRate) &&
162              (sbc_data.channelMode &
163               kDefaultOffloadSbcCapability.channelMode) &&
164              (sbc_data.blockLength &
165               kDefaultOffloadSbcCapability.blockLength) &&
166              (sbc_data.numSubbands &
167               kDefaultOffloadSbcCapability.numSubbands) &&
168              (sbc_data.allocMethod &
169               kDefaultOffloadSbcCapability.allocMethod) &&
170              (sbc_data.bitsPerSample &
171               kDefaultOffloadSbcCapability.bitsPerSample) &&
172              (kDefaultOffloadSbcCapability.minBitpool <= sbc_data.minBitpool &&
173               sbc_data.maxBitpool <= kDefaultOffloadSbcCapability.maxBitpool)) {
174     return true;
175   }
176   LOG(WARNING) << __func__
177                << ": Unsupported CodecSpecific=" << toString(codec_specific);
178   return false;
179 }
180 
IsOffloadAacConfigurationValid(const CodecConfiguration::CodecSpecific & codec_specific)181 static bool IsOffloadAacConfigurationValid(
182     const CodecConfiguration::CodecSpecific& codec_specific) {
183   if (codec_specific.getDiscriminator() !=
184       CodecConfiguration::CodecSpecific::hidl_discriminator::aacConfig) {
185     LOG(WARNING) << __func__
186                  << ": Invalid CodecSpecific=" << toString(codec_specific);
187     return false;
188   }
189   const AacParameters aac_data = codec_specific.aacConfig();
190   if (!IsSingleBit(static_cast<uint32_t>(aac_data.objectType), 0xf0) ||
191       !IsSingleBit(static_cast<uint32_t>(aac_data.sampleRate), 0xff) ||
192       !IsSingleBit(static_cast<uint32_t>(aac_data.channelMode), 0x03) ||
193       !IsSingleBit(static_cast<uint32_t>(aac_data.bitsPerSample), 0x07)) {
194     LOG(WARNING) << __func__
195                  << ": Invalid CodecSpecific=" << toString(codec_specific);
196     return false;
197   } else if ((aac_data.objectType & kDefaultOffloadAacCapability.objectType) &&
198              (aac_data.sampleRate & kDefaultOffloadAacCapability.sampleRate) &&
199              (aac_data.channelMode &
200               kDefaultOffloadAacCapability.channelMode) &&
201              (aac_data.variableBitRateEnabled == AacVariableBitRate::DISABLED ||
202               kDefaultOffloadAacCapability.variableBitRateEnabled ==
203                   AacVariableBitRate::ENABLED) &&
204              (aac_data.bitsPerSample &
205               kDefaultOffloadAacCapability.bitsPerSample)) {
206     return true;
207   }
208   LOG(WARNING) << __func__
209                << ": Unsupported CodecSpecific=" << toString(codec_specific);
210   return false;
211 }
212 
IsOffloadLdacConfigurationValid(const CodecConfiguration::CodecSpecific & codec_specific)213 static bool IsOffloadLdacConfigurationValid(
214     const CodecConfiguration::CodecSpecific& codec_specific) {
215   if (codec_specific.getDiscriminator() !=
216       CodecConfiguration::CodecSpecific::hidl_discriminator::ldacConfig) {
217     LOG(WARNING) << __func__
218                  << ": Invalid CodecSpecific=" << toString(codec_specific);
219     return false;
220   }
221   const LdacParameters ldac_data = codec_specific.ldacConfig();
222   if (!IsSingleBit(static_cast<uint32_t>(ldac_data.sampleRate), 0xff) ||
223       !IsSingleBit(static_cast<uint32_t>(ldac_data.channelMode), 0x07) ||
224       (ldac_data.qualityIndex > LdacQualityIndex::QUALITY_LOW &&
225        ldac_data.qualityIndex != LdacQualityIndex::QUALITY_ABR) ||
226       !IsSingleBit(static_cast<uint32_t>(ldac_data.bitsPerSample), 0x07)) {
227     LOG(WARNING) << __func__
228                  << ": Invalid CodecSpecific=" << toString(codec_specific);
229     return false;
230   } else if ((ldac_data.sampleRate &
231               kDefaultOffloadLdacCapability.sampleRate) &&
232              (ldac_data.channelMode &
233               kDefaultOffloadLdacCapability.channelMode) &&
234              (ldac_data.bitsPerSample &
235               kDefaultOffloadLdacCapability.bitsPerSample)) {
236     return true;
237   }
238   LOG(WARNING) << __func__
239                << ": Unsupported CodecSpecific=" << toString(codec_specific);
240   return false;
241 }
242 
IsOffloadAptxConfigurationValid(const CodecConfiguration::CodecSpecific & codec_specific)243 static bool IsOffloadAptxConfigurationValid(
244     const CodecConfiguration::CodecSpecific& codec_specific) {
245   if (codec_specific.getDiscriminator() !=
246       CodecConfiguration::CodecSpecific::hidl_discriminator::aptxConfig) {
247     LOG(WARNING) << __func__
248                  << ": Invalid CodecSpecific=" << toString(codec_specific);
249     return false;
250   }
251   const AptxParameters aptx_data = codec_specific.aptxConfig();
252   if (!IsSingleBit(static_cast<uint32_t>(aptx_data.sampleRate), 0xff) ||
253       !IsSingleBit(static_cast<uint32_t>(aptx_data.channelMode), 0x03) ||
254       !IsSingleBit(static_cast<uint32_t>(aptx_data.bitsPerSample), 0x07)) {
255     LOG(WARNING) << __func__
256                  << ": Invalid CodecSpecific=" << toString(codec_specific);
257     return false;
258   } else if ((aptx_data.sampleRate &
259               kDefaultOffloadAptxCapability.sampleRate) &&
260              (aptx_data.channelMode &
261               kDefaultOffloadAptxCapability.channelMode) &&
262              (aptx_data.bitsPerSample &
263               kDefaultOffloadAptxCapability.bitsPerSample)) {
264     return true;
265   }
266   LOG(WARNING) << __func__
267                << ": Unsupported CodecSpecific=" << toString(codec_specific);
268   return false;
269 }
270 
IsOffloadAptxHdConfigurationValid(const CodecConfiguration::CodecSpecific & codec_specific)271 static bool IsOffloadAptxHdConfigurationValid(
272     const CodecConfiguration::CodecSpecific& codec_specific) {
273   if (codec_specific.getDiscriminator() !=
274       CodecConfiguration::CodecSpecific::hidl_discriminator::aptxConfig) {
275     LOG(WARNING) << __func__
276                  << ": Invalid CodecSpecific=" << toString(codec_specific);
277     return false;
278   }
279   const AptxParameters aptx_data = codec_specific.aptxConfig();
280   if (!IsSingleBit(static_cast<uint32_t>(aptx_data.sampleRate), 0xff) ||
281       !IsSingleBit(static_cast<uint32_t>(aptx_data.channelMode), 0x03) ||
282       !IsSingleBit(static_cast<uint32_t>(aptx_data.bitsPerSample), 0x07)) {
283     LOG(WARNING) << __func__
284                  << ": Invalid CodecSpecific=" << toString(codec_specific);
285     return false;
286   } else if ((aptx_data.sampleRate &
287               kDefaultOffloadAptxHdCapability.sampleRate) &&
288              (aptx_data.channelMode &
289               kDefaultOffloadAptxHdCapability.channelMode) &&
290              (aptx_data.bitsPerSample &
291               kDefaultOffloadAptxHdCapability.bitsPerSample)) {
292     return true;
293   }
294   LOG(WARNING) << __func__
295                << ": Unsupported CodecSpecific=" << toString(codec_specific);
296   return false;
297 }
298 
GetSoftwarePcmCapabilities()299 std::vector<PcmParameters> GetSoftwarePcmCapabilities() {
300   return std::vector<PcmParameters>(1, kDefaultSoftwarePcmCapabilities);
301 }
302 
GetOffloadCodecCapabilities(const SessionType & session_type)303 std::vector<CodecCapabilities> GetOffloadCodecCapabilities(
304     const SessionType& session_type) {
305   if (session_type != SessionType::A2DP_HARDWARE_OFFLOAD_DATAPATH) {
306     return std::vector<CodecCapabilities>(0);
307   }
308   std::vector<CodecCapabilities> offload_a2dp_codec_capabilities =
309       kDefaultOffloadA2dpCodecCapabilities;
310   for (auto& codec_capability : offload_a2dp_codec_capabilities) {
311     switch (codec_capability.codecType) {
312       case CodecType::SBC:
313         codec_capability.capabilities.sbcCapabilities(
314             kDefaultOffloadSbcCapability);
315         break;
316       case CodecType::AAC:
317         codec_capability.capabilities.aacCapabilities(
318             kDefaultOffloadAacCapability);
319         break;
320       case CodecType::LDAC:
321         codec_capability.capabilities.ldacCapabilities(
322             kDefaultOffloadLdacCapability);
323         break;
324       case CodecType::APTX:
325         codec_capability.capabilities.aptxCapabilities(
326             kDefaultOffloadAptxCapability);
327         break;
328       case CodecType::APTX_HD:
329         codec_capability.capabilities.aptxCapabilities(
330             kDefaultOffloadAptxHdCapability);
331         break;
332       case CodecType::UNKNOWN:
333         codec_capability = {};
334         break;
335     }
336   }
337   return offload_a2dp_codec_capabilities;
338 }
339 
IsSoftwarePcmConfigurationValid(const PcmParameters & pcm_config)340 bool IsSoftwarePcmConfigurationValid(const PcmParameters& pcm_config) {
341   if ((pcm_config.sampleRate != SampleRate::RATE_44100 &&
342        pcm_config.sampleRate != SampleRate::RATE_48000 &&
343        pcm_config.sampleRate != SampleRate::RATE_88200 &&
344        pcm_config.sampleRate != SampleRate::RATE_96000 &&
345        pcm_config.sampleRate != SampleRate::RATE_16000 &&
346        pcm_config.sampleRate != SampleRate::RATE_24000) ||
347       (pcm_config.bitsPerSample != BitsPerSample::BITS_16 &&
348        pcm_config.bitsPerSample != BitsPerSample::BITS_24 &&
349        pcm_config.bitsPerSample != BitsPerSample::BITS_32) ||
350       (pcm_config.channelMode != ChannelMode::MONO &&
351        pcm_config.channelMode != ChannelMode::STEREO)) {
352     LOG(WARNING) << __func__
353                  << ": Invalid PCM Configuration=" << toString(pcm_config);
354     return false;
355   } else if (pcm_config.sampleRate &
356                  kDefaultSoftwarePcmCapabilities.sampleRate &&
357              pcm_config.bitsPerSample &
358                  kDefaultSoftwarePcmCapabilities.bitsPerSample &&
359              pcm_config.channelMode &
360                  kDefaultSoftwarePcmCapabilities.channelMode) {
361     return true;
362   }
363   LOG(WARNING) << __func__
364                << ": Unsupported PCM Configuration=" << toString(pcm_config);
365   return false;
366 }
367 
IsOffloadCodecConfigurationValid(const SessionType & session_type,const CodecConfiguration & codec_config)368 bool IsOffloadCodecConfigurationValid(const SessionType& session_type,
369                                       const CodecConfiguration& codec_config) {
370   if (session_type != SessionType::A2DP_HARDWARE_OFFLOAD_DATAPATH) {
371     LOG(ERROR) << __func__
372                << ": Invalid SessionType=" << toString(session_type);
373     return false;
374   } else if (codec_config.encodedAudioBitrate < 0x00000001 ||
375              0x00ffffff < codec_config.encodedAudioBitrate) {
376     LOG(ERROR) << __func__ << ": Unsupported Codec Configuration="
377                << toString(codec_config);
378     return false;
379   }
380   const CodecConfiguration::CodecSpecific& codec_specific = codec_config.config;
381   switch (codec_config.codecType) {
382     case CodecType::SBC:
383       if (IsOffloadSbcConfigurationValid(codec_specific)) {
384         return true;
385       }
386       return false;
387     case CodecType::AAC:
388       if (IsOffloadAacConfigurationValid(codec_specific)) {
389         return true;
390       }
391       return false;
392     case CodecType::LDAC:
393       if (IsOffloadLdacConfigurationValid(codec_specific)) {
394         return true;
395       }
396       return false;
397     case CodecType::APTX:
398       if (IsOffloadAptxConfigurationValid(codec_specific)) {
399         return true;
400       }
401       return false;
402     case CodecType::APTX_HD:
403       if (IsOffloadAptxHdConfigurationValid(codec_specific)) {
404         return true;
405       }
406       return false;
407     case CodecType::UNKNOWN:
408       return false;
409   }
410   return false;
411 }
412 
413 }  // namespace audio
414 }  // namespace bluetooth
415 }  // namespace android
416