| /* |
| * Copyright (C) 2017 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. |
| */ |
| |
| #ifndef ANDROID_HARDWARE_STREAM_POWER_LOG_H |
| #define ANDROID_HARDWARE_STREAM_POWER_LOG_H |
| |
| #include <audio_utils/clock.h> |
| #include <audio_utils/PowerLog.h> |
| #include <cutils/properties.h> |
| #include <system/audio.h> |
| |
| namespace android { |
| |
| class StreamPowerLog { |
| public: |
| StreamPowerLog() : |
| mIsUserDebugOrEngBuild(is_userdebug_or_eng_build()), |
| mPowerLog(nullptr), |
| mFrameSize(0) { |
| // use init() to set up the power log. |
| } |
| |
| ~StreamPowerLog() { |
| power_log_destroy(mPowerLog); // OK for null mPowerLog |
| mPowerLog = nullptr; |
| } |
| |
| // A one-time initialization (do not call twice) before using StreamPowerLog. |
| void init(uint32_t sampleRate, audio_channel_mask_t channelMask, audio_format_t format) { |
| if (mPowerLog == nullptr) { |
| // Note: A way to get channel count for both input and output channel masks |
| // but does not check validity of the channel mask. |
| const uint32_t channelCount = popcount(audio_channel_mask_get_bits(channelMask)); |
| mFrameSize = channelCount * audio_bytes_per_sample(format); |
| if (mFrameSize > 0) { |
| const size_t kPowerLogFramesPerEntry = |
| (long long)sampleRate * kPowerLogSamplingIntervalMs / 1000; |
| mPowerLog = power_log_create( |
| sampleRate, |
| channelCount, |
| format, |
| kPowerLogEntries, |
| kPowerLogFramesPerEntry); |
| } |
| } |
| // mPowerLog may be NULL (not the right build, format not accepted, etc.). |
| } |
| |
| // Dump the power log to fd. |
| void dump(int fd) const { |
| // OK for null mPowerLog |
| (void)power_log_dump( |
| mPowerLog, fd, " " /* prefix */, kPowerLogLines, 0 /* limit_ns */); |
| } |
| |
| // Log the audio data contained in buffer. |
| void log(const void *buffer, size_t sizeInBytes) const { |
| if (mPowerLog != nullptr) { // mFrameSize is always nonzero if mPowerLog exists. |
| power_log_log( |
| mPowerLog, buffer, sizeInBytes / mFrameSize, audio_utils_get_real_time_ns()); |
| } |
| } |
| |
| bool isUserDebugOrEngBuild() const { |
| return mIsUserDebugOrEngBuild; |
| } |
| |
| private: |
| |
| static inline bool is_userdebug_or_eng_build() { |
| char value[PROPERTY_VALUE_MAX]; |
| (void)property_get("ro.build.type", value, "unknown"); // ignore actual length |
| return strcmp(value, "userdebug") == 0 || strcmp(value, "eng") == 0; |
| } |
| |
| // Audio signal power log configuration. |
| static const size_t kPowerLogLines = 40; |
| static const size_t kPowerLogSamplingIntervalMs = 50; |
| static const size_t kPowerLogEntries = (1 /* minutes */ * 60 /* seconds */ * 1000 /* msec */ |
| / kPowerLogSamplingIntervalMs); |
| |
| const bool mIsUserDebugOrEngBuild; |
| power_log_t *mPowerLog; |
| size_t mFrameSize; |
| }; |
| |
| } // namespace android |
| |
| #endif // ANDROID_HARDWARE_STREAM_POWER_LOG_H |