AOSP AIDL USB audio HAL implementation.
Bug: 266216550
Test: atest VtsHalAudioCoreTargetTest
Change-Id: I82e053d3f6a918cafe0d43b030f724f63a99eb2a
diff --git a/audio/aidl/default/usb/UsbAlsaUtils.cpp b/audio/aidl/default/usb/UsbAlsaUtils.cpp
new file mode 100644
index 0000000..3c79e1d
--- /dev/null
+++ b/audio/aidl/default/usb/UsbAlsaUtils.cpp
@@ -0,0 +1,181 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+#include <map>
+#include <set>
+
+#include <Utils.h>
+#include <aidl/android/media/audio/common/AudioFormatType.h>
+#include <aidl/android/media/audio/common/PcmType.h>
+
+#include "UsbAlsaUtils.h"
+#include "core-impl/utils.h"
+
+using aidl::android::media::audio::common::AudioChannelLayout;
+using aidl::android::media::audio::common::AudioFormatDescription;
+using aidl::android::media::audio::common::AudioFormatType;
+using aidl::android::media::audio::common::PcmType;
+using android::hardware::audio::common::getChannelCount;
+
+namespace aidl::android::hardware::audio::core::usb {
+
+namespace {
+
+using AudioChannelCountToMaskMap = std::map<unsigned int, AudioChannelLayout>;
+using AudioFormatDescToPcmFormatMap = std::map<AudioFormatDescription, enum pcm_format>;
+using PcmFormatToAudioFormatDescMap = std::map<enum pcm_format, AudioFormatDescription>;
+
+static const AudioChannelLayout INVALID_CHANNEL_LAYOUT =
+ AudioChannelLayout::make<AudioChannelLayout::Tag::invalid>(0);
+
+#define DEFINE_CHANNEL_LAYOUT_MASK(n) \
+ AudioChannelLayout::make<AudioChannelLayout::Tag::layoutMask>(AudioChannelLayout::LAYOUT_##n)
+
+static const std::set<AudioChannelLayout> SUPPORTED_OUT_CHANNEL_LAYOUTS = {
+ DEFINE_CHANNEL_LAYOUT_MASK(MONO), DEFINE_CHANNEL_LAYOUT_MASK(STEREO),
+ DEFINE_CHANNEL_LAYOUT_MASK(2POINT1), DEFINE_CHANNEL_LAYOUT_MASK(QUAD),
+ DEFINE_CHANNEL_LAYOUT_MASK(PENTA), DEFINE_CHANNEL_LAYOUT_MASK(5POINT1),
+ DEFINE_CHANNEL_LAYOUT_MASK(6POINT1), DEFINE_CHANNEL_LAYOUT_MASK(7POINT1),
+ DEFINE_CHANNEL_LAYOUT_MASK(7POINT1POINT4), DEFINE_CHANNEL_LAYOUT_MASK(22POINT2),
+};
+
+static const std::set<AudioChannelLayout> SUPPORTED_IN_CHANNEL_LAYOUTS = {
+ DEFINE_CHANNEL_LAYOUT_MASK(MONO),
+ DEFINE_CHANNEL_LAYOUT_MASK(STEREO),
+};
+
+#define DEFINE_CHANNEL_INDEX_MASK(n) \
+ AudioChannelLayout::make<AudioChannelLayout::Tag::indexMask>(AudioChannelLayout::INDEX_MASK_##n)
+
+static const std::set<AudioChannelLayout> SUPPORTED_INDEX_CHANNEL_LAYOUTS = {
+ DEFINE_CHANNEL_INDEX_MASK(1), DEFINE_CHANNEL_INDEX_MASK(2), DEFINE_CHANNEL_INDEX_MASK(3),
+ DEFINE_CHANNEL_INDEX_MASK(4), DEFINE_CHANNEL_INDEX_MASK(5), DEFINE_CHANNEL_INDEX_MASK(6),
+ DEFINE_CHANNEL_INDEX_MASK(7), DEFINE_CHANNEL_INDEX_MASK(8), DEFINE_CHANNEL_INDEX_MASK(9),
+ DEFINE_CHANNEL_INDEX_MASK(10), DEFINE_CHANNEL_INDEX_MASK(11), DEFINE_CHANNEL_INDEX_MASK(12),
+ DEFINE_CHANNEL_INDEX_MASK(13), DEFINE_CHANNEL_INDEX_MASK(14), DEFINE_CHANNEL_INDEX_MASK(15),
+ DEFINE_CHANNEL_INDEX_MASK(16), DEFINE_CHANNEL_INDEX_MASK(17), DEFINE_CHANNEL_INDEX_MASK(18),
+ DEFINE_CHANNEL_INDEX_MASK(19), DEFINE_CHANNEL_INDEX_MASK(20), DEFINE_CHANNEL_INDEX_MASK(21),
+ DEFINE_CHANNEL_INDEX_MASK(22), DEFINE_CHANNEL_INDEX_MASK(23), DEFINE_CHANNEL_INDEX_MASK(24),
+};
+
+static AudioChannelCountToMaskMap make_ChannelCountToMaskMap(
+ const std::set<AudioChannelLayout>& channelMasks) {
+ AudioChannelCountToMaskMap channelMaskToCountMap;
+ for (const auto& channelMask : channelMasks) {
+ channelMaskToCountMap.emplace(getChannelCount(channelMask), channelMask);
+ }
+ return channelMaskToCountMap;
+}
+
+const AudioChannelCountToMaskMap& getSupportedChannelOutLayoutMap() {
+ static const AudioChannelCountToMaskMap outLayouts =
+ make_ChannelCountToMaskMap(SUPPORTED_OUT_CHANNEL_LAYOUTS);
+ return outLayouts;
+}
+
+const AudioChannelCountToMaskMap& getSupportedChannelInLayoutMap() {
+ static const AudioChannelCountToMaskMap inLayouts =
+ make_ChannelCountToMaskMap(SUPPORTED_IN_CHANNEL_LAYOUTS);
+ return inLayouts;
+}
+
+const AudioChannelCountToMaskMap& getSupportedChannelIndexLayoutMap() {
+ static const AudioChannelCountToMaskMap indexLayouts =
+ make_ChannelCountToMaskMap(SUPPORTED_INDEX_CHANNEL_LAYOUTS);
+ return indexLayouts;
+}
+
+AudioFormatDescription make_AudioFormatDescription(AudioFormatType type) {
+ AudioFormatDescription result;
+ result.type = type;
+ return result;
+}
+
+AudioFormatDescription make_AudioFormatDescription(PcmType pcm) {
+ auto result = make_AudioFormatDescription(AudioFormatType::PCM);
+ result.pcm = pcm;
+ return result;
+}
+
+const AudioFormatDescToPcmFormatMap& getAudioFormatDescriptorToPcmFormatMap() {
+ static const AudioFormatDescToPcmFormatMap formatDescToPcmFormatMap = {
+ {make_AudioFormatDescription(PcmType::UINT_8_BIT), PCM_FORMAT_S8},
+ {make_AudioFormatDescription(PcmType::INT_16_BIT), PCM_FORMAT_S16_LE},
+ {make_AudioFormatDescription(PcmType::INT_24_BIT), PCM_FORMAT_S24_LE},
+ {make_AudioFormatDescription(PcmType::FIXED_Q_8_24), PCM_FORMAT_S24_3LE},
+ {make_AudioFormatDescription(PcmType::INT_32_BIT), PCM_FORMAT_S32_LE},
+ {make_AudioFormatDescription(PcmType::FLOAT_32_BIT), PCM_FORMAT_FLOAT_LE},
+ };
+ return formatDescToPcmFormatMap;
+}
+
+static PcmFormatToAudioFormatDescMap make_PcmFormatToAudioFormatDescMap(
+ const AudioFormatDescToPcmFormatMap& formatDescToPcmFormatMap) {
+ PcmFormatToAudioFormatDescMap result;
+ for (const auto& formatPair : formatDescToPcmFormatMap) {
+ result.emplace(formatPair.second, formatPair.first);
+ }
+ return result;
+}
+
+const PcmFormatToAudioFormatDescMap& getPcmFormatToAudioFormatDescMap() {
+ static const PcmFormatToAudioFormatDescMap pcmFormatToFormatDescMap =
+ make_PcmFormatToAudioFormatDescMap(getAudioFormatDescriptorToPcmFormatMap());
+ return pcmFormatToFormatDescMap;
+}
+
+} // namespace
+
+AudioChannelLayout getChannelLayoutMaskFromChannelCount(unsigned int channelCount, int isInput) {
+ return findValueOrDefault(
+ isInput ? getSupportedChannelInLayoutMap() : getSupportedChannelOutLayoutMap(),
+ channelCount, INVALID_CHANNEL_LAYOUT);
+}
+
+AudioChannelLayout getChannelIndexMaskFromChannelCount(unsigned int channelCount) {
+ return findValueOrDefault(getSupportedChannelIndexLayoutMap(), channelCount,
+ INVALID_CHANNEL_LAYOUT);
+}
+
+unsigned int getChannelCountFromChannelMask(const AudioChannelLayout& channelMask, bool isInput) {
+ switch (channelMask.getTag()) {
+ case AudioChannelLayout::Tag::layoutMask: {
+ return findKeyOrDefault(
+ isInput ? getSupportedChannelInLayoutMap() : getSupportedChannelOutLayoutMap(),
+ (unsigned int)getChannelCount(channelMask), 0u /*defaultValue*/);
+ }
+ case AudioChannelLayout::Tag::indexMask: {
+ return findKeyOrDefault(getSupportedChannelIndexLayoutMap(),
+ (unsigned int)getChannelCount(channelMask),
+ 0u /*defaultValue*/);
+ }
+ case AudioChannelLayout::Tag::none:
+ case AudioChannelLayout::Tag::invalid:
+ case AudioChannelLayout::Tag::voiceMask:
+ default:
+ return 0;
+ }
+}
+
+AudioFormatDescription legacy2aidl_pcm_format_AudioFormatDescription(enum pcm_format legacy) {
+ return findValueOrDefault(getPcmFormatToAudioFormatDescMap(), legacy, AudioFormatDescription());
+}
+
+pcm_format aidl2legacy_AudioFormatDescription_pcm_format(const AudioFormatDescription& aidl) {
+ return findValueOrDefault(getAudioFormatDescriptorToPcmFormatMap(), aidl, PCM_FORMAT_INVALID);
+}
+
+} // namespace aidl::android::hardware::audio::core::usb
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