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106 lines
3.6 KiB
106 lines
3.6 KiB
4 months ago
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_HARDWARE_STREAM_POWER_LOG_H
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#define ANDROID_HARDWARE_STREAM_POWER_LOG_H
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#include <audio_utils/clock.h>
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#include <audio_utils/PowerLog.h>
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#include <cutils/bitops.h>
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#include <cutils/properties.h>
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#include <system/audio.h>
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namespace android {
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namespace CPP_VERSION {
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class StreamPowerLog {
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public:
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StreamPowerLog() :
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mIsUserDebugOrEngBuild(is_userdebug_or_eng_build()),
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mPowerLog(nullptr),
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mFrameSize(0) {
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// use init() to set up the power log.
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}
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~StreamPowerLog() {
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power_log_destroy(mPowerLog); // OK for null mPowerLog
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mPowerLog = nullptr;
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}
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// A one-time initialization (do not call twice) before using StreamPowerLog.
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void init(uint32_t sampleRate, audio_channel_mask_t channelMask, audio_format_t format) {
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if (mPowerLog == nullptr) {
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// Note: A way to get channel count for both input and output channel masks
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// but does not check validity of the channel mask.
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const uint32_t channelCount = popcount(audio_channel_mask_get_bits(channelMask));
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mFrameSize = channelCount * audio_bytes_per_sample(format);
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if (mFrameSize > 0) {
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const size_t kPowerLogFramesPerEntry =
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(long long)sampleRate * kPowerLogSamplingIntervalMs / 1000;
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mPowerLog = power_log_create(
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sampleRate,
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channelCount,
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format,
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kPowerLogEntries,
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kPowerLogFramesPerEntry);
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}
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}
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// mPowerLog may be NULL (not the right build, format not accepted, etc.).
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}
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// Dump the power log to fd.
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void dump(int fd) const {
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// OK for null mPowerLog
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(void)power_log_dump(
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mPowerLog, fd, " " /* prefix */, kPowerLogLines, 0 /* limit_ns */);
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}
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// Log the audio data contained in buffer.
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void log(const void *buffer, size_t sizeInBytes) const {
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if (mPowerLog != nullptr) { // mFrameSize is always nonzero if mPowerLog exists.
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power_log_log(
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mPowerLog, buffer, sizeInBytes / mFrameSize, audio_utils_get_real_time_ns());
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}
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}
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bool isUserDebugOrEngBuild() const {
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return mIsUserDebugOrEngBuild;
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}
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private:
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static inline bool is_userdebug_or_eng_build() {
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char value[PROPERTY_VALUE_MAX];
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(void)property_get("ro.build.type", value, "unknown"); // ignore actual length
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return strcmp(value, "userdebug") == 0 || strcmp(value, "eng") == 0;
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}
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// Audio signal power log configuration.
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static const size_t kPowerLogLines = 40;
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static const size_t kPowerLogSamplingIntervalMs = 50;
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static const size_t kPowerLogEntries = (1 /* minutes */ * 60 /* seconds */ * 1000 /* msec */
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/ kPowerLogSamplingIntervalMs);
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const bool mIsUserDebugOrEngBuild;
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power_log_t *mPowerLog;
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size_t mFrameSize;
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};
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} // namespace CPP_VERSION
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} // namespace android
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#endif // ANDROID_HARDWARE_STREAM_POWER_LOG_H
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