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https://github.com/mudita/MuditaOS.git
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72b06448e1
Set of fixes for Bluetooth volume control issues: * split OS volume from A2DP device volume; * added translations for additional popup required to indicate what volume is being set; * fixed issue that on some devices setting the lowest volume level would set the highest in reality; * fixed Bluetooth auto-turnoff functionality; * minor code cleanup.
70 lines
2.8 KiB
C++
70 lines
2.8 KiB
C++
// Copyright (c) 2017-2022, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#include "VolumeScaler.hpp"
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namespace audio::volume::scaler
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{
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namespace
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{
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/// @brief Takes volume level from bluetooth profile and converts it to according one for the system.
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/// @param profileVolume - Bluetooth profile volume level.
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/// @param profileMaxVolume - Bluetooth profile max volume level.
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/// @return Volume level scaled to satisfy system's range [audio::minVolume, audio::maxVolume].
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Volume btProfileToSystemVolume(std::uint8_t profileVolume, float profileMaxVolume) noexcept
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{
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const auto systemVolume = (profileVolume / profileMaxVolume) * audio::maxVolume;
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// prevents conversion to 0 while in fact sound is not muted
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if (systemVolume > 0.01f && systemVolume < 1.0f) {
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return 1;
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}
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return systemVolume;
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}
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/// @brief Takes volume level and converts it to according one for the bluetooth profile.
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/// @param systemVolume - system volume level.
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/// @param profileMaxVolume - bluetooth profile max volume level.
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/// @return Volume level scaled to satisfy bluetooth profile range [0, profileMaxVolume].
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std::uint8_t systemToBtProfileVolume(float systemVolume, std::uint8_t profileMaxVolume) noexcept
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{
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return std::round(systemVolume * profileMaxVolume / audio::maxVolume);
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}
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} // namespace
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namespace a2dp
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{
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constexpr auto avrcpMaxVolume = std::uint8_t{0x7F}; // from AVRCP documentation
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Volume toSystemVolume(std::uint8_t avrcpVolume) noexcept
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{
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return btProfileToSystemVolume(avrcpVolume, static_cast<float>(avrcpMaxVolume));
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}
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} // namespace a2dp
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namespace hsp
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{
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constexpr auto hspMaxVolume = float{0x0F}; // from HSP documentation
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Volume toSystemVolume(std::uint8_t hspSpeakerGain) noexcept
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{
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return btProfileToSystemVolume(hspSpeakerGain, static_cast<float>(hspMaxVolume));
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}
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std::uint8_t toHSPGain(float systemVolume) noexcept
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{
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return systemToBtProfileVolume(systemVolume, hspMaxVolume);
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}
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} // namespace hsp
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namespace hfp
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{
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constexpr auto hfpMaxVolume = float{0x0F}; // from HFP documentation
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Volume toSystemVolume(std::uint8_t hfpSpeakerGain) noexcept
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{
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return btProfileToSystemVolume(hfpSpeakerGain, static_cast<float>(hfpMaxVolume));
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}
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std::uint8_t toHFPGain(float systemVolume) noexcept
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{
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return systemToBtProfileVolume(systemVolume, hfpMaxVolume);
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}
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} // namespace hfp
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} // namespace audio::volume::scaler
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