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/*
* Copyright (C) 2020 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 <log/log.h>
#include <cutils/bitops.h>
#include <system/audio.h>
#include "util.h"
namespace android {
namespace hardware {
namespace audio {
namespace V6_0 {
namespace implementation {
namespace util {
namespace {
const std::array<uint32_t, 8> kSupportedRatesHz = {
8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000
};
const std::array<hidl_bitfield<AudioChannelMask>, 4> kSupportedInChannelMask = {
AudioChannelMask::IN_LEFT | 0,
AudioChannelMask::IN_RIGHT | 0,
AudioChannelMask::IN_FRONT | 0,
AudioChannelMask::IN_STEREO | 0,
};
const std::array<hidl_bitfield<AudioChannelMask>, 4> kSupportedOutChannelMask = {
AudioChannelMask::OUT_FRONT_LEFT | 0,
AudioChannelMask::OUT_FRONT_RIGHT | 0,
AudioChannelMask::OUT_FRONT_CENTER | 0,
AudioChannelMask::OUT_STEREO | 0,
};
const std::array<AudioFormat, 1> kSupportedAudioFormats = {
AudioFormat::PCM_16_BIT,
};
bool checkSampleRateHz(uint32_t value, uint32_t &suggest) {
for (const uint32_t supported : kSupportedRatesHz) {
if (value <= supported) {
suggest = supported;
return (value == supported);
}
}
suggest = kSupportedRatesHz.back();
return false;
}
size_t getBufferSizeFrames(size_t duration_ms, uint32_t sample_rate) {
return sample_rate * duration_ms / 1000;
}
} // namespace
MicrophoneInfo getMicrophoneInfo() {
MicrophoneInfo mic;
mic.deviceId = "mic_goldfish";
mic.group = 0;
mic.indexInTheGroup = 0;
mic.sensitivity = AUDIO_MICROPHONE_SENSITIVITY_UNKNOWN;
mic.maxSpl = AUDIO_MICROPHONE_SENSITIVITY_UNKNOWN;
mic.minSpl = AUDIO_MICROPHONE_SENSITIVITY_UNKNOWN;
mic.directionality = AudioMicrophoneDirectionality::UNKNOWN;
mic.position.x = AUDIO_MICROPHONE_COORDINATE_UNKNOWN;
mic.position.y = AUDIO_MICROPHONE_COORDINATE_UNKNOWN;
mic.position.z = AUDIO_MICROPHONE_COORDINATE_UNKNOWN;
mic.orientation.x = AUDIO_MICROPHONE_COORDINATE_UNKNOWN;
mic.orientation.y = AUDIO_MICROPHONE_COORDINATE_UNKNOWN;
mic.orientation.z = AUDIO_MICROPHONE_COORDINATE_UNKNOWN;
return mic;
}
size_t countChannels(hidl_bitfield<AudioChannelMask> mask) {
return popcount(mask);
}
size_t getBytesPerSample(AudioFormat format) {
return audio_bytes_per_sample(static_cast<audio_format_t>(format));
}
bool checkAudioConfig(bool isOut,
size_t duration_ms,
const AudioConfig &cfg,
AudioConfig &suggested) {
bool valid = checkSampleRateHz(cfg.sampleRateHz, suggested.sampleRateHz);
if (isOut) {
if (std::find(kSupportedOutChannelMask.begin(),
kSupportedOutChannelMask.end(),
cfg.channelMask) == kSupportedOutChannelMask.end()) {
suggested.channelMask = AudioChannelMask::OUT_STEREO | 0;
valid = false;
} else {
suggested.channelMask = cfg.channelMask;
}
} else {
if (std::find(kSupportedInChannelMask.begin(),
kSupportedInChannelMask.end(),
cfg.channelMask) == kSupportedInChannelMask.end()) {
suggested.channelMask = AudioChannelMask::IN_STEREO | 0;
valid = false;
} else {
suggested.channelMask = cfg.channelMask;
}
}
if (std::find(kSupportedAudioFormats.begin(),
kSupportedAudioFormats.end(),
cfg.format) == kSupportedAudioFormats.end()) {
suggested.format = AudioFormat::PCM_16_BIT;
valid = false;
} else {
suggested.format = cfg.format;
}
suggested.offloadInfo = cfg.offloadInfo; // don't care
suggested.frameCount = (cfg.frameCount == 0)
? getBufferSizeFrames(duration_ms, suggested.sampleRateHz)
: cfg.frameCount;
return valid;
}
StreamPosition::StreamPosition() : mTimestamp(systemTime(SYSTEM_TIME_MONOTONIC)) {}
void StreamPosition::addFrames(uint64_t n) {
mTimestamp = systemTime(SYSTEM_TIME_MONOTONIC);
mFrames += n;
}
void StreamPosition::now(const size_t sampleRateHz,
uint64_t &frames,
nsecs_t ×tamp) const {
const nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
const uint64_t deltaUs = ns2us(now - mTimestamp);
frames = mFrames + sampleRateHz * deltaUs / 1000000;
timestamp = now;
}
void StreamPosition::reset() {
*this = StreamPosition();
}
} // namespace util
} // namespace implementation
} // namespace V6_0
} // namespace audio
} // namespace hardware
} // namespace android
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