1 // Copyright (C) 2022 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //      http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #include "AudioUtil.h"
16 
17 #include <system/audio.h>
18 
19 namespace audio_proxy::service {
computeFrameSize(const AidlAudioConfig & config)20 int computeFrameSize(const AidlAudioConfig& config) {
21   audio_format_t format = static_cast<audio_format_t>(config.format);
22 
23   if (!audio_has_proportional_frames(format)) {
24     return sizeof(int8_t);
25   }
26 
27   size_t channelSampleSize = audio_bytes_per_sample(format);
28   return audio_channel_count_from_out_mask(
29              static_cast<audio_channel_mask_t>(config.channelMask)) *
30          channelSampleSize;
31 }
32 
computeBufferSizeBytes(const AidlAudioConfig & config,int32_t bufferSizeMs)33 int64_t computeBufferSizeBytes(const AidlAudioConfig& config,
34                                int32_t bufferSizeMs) {
35   return static_cast<int64_t>(bufferSizeMs) * config.sampleRateHz *
36          computeFrameSize(config) / 1000;
37 }
38 }  // namespace audio_proxy::service