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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 "src/traced/probes/initial_display_state/initial_display_state_data_source.h"
#include "perfetto/base/task_runner.h"
#include "perfetto/base/time.h"
#include "perfetto/ext/base/optional.h"
#include "perfetto/ext/base/string_utils.h"
#include "perfetto/tracing/core/data_source_config.h"
#include "protos/perfetto/config/android/android_polled_state_config.pbzero.h"
#include "protos/perfetto/trace/android/initial_display_state.pbzero.h"
#include "protos/perfetto/trace/trace_packet.pbzero.h"
#if PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
#include <sys/system_properties.h>
#endif
namespace perfetto {
// static
const InitialDisplayStateDataSource::Descriptor
InitialDisplayStateDataSource::descriptor = {
/* name */ "android.polled_state",
/* flags */ Descriptor::kFlagsNone,
};
InitialDisplayStateDataSource::InitialDisplayStateDataSource(
base::TaskRunner* task_runner,
const DataSourceConfig& ds_config,
TracingSessionID session_id,
std::unique_ptr<TraceWriter> writer)
: ProbesDataSource(session_id, &descriptor),
task_runner_(task_runner),
writer_(std::move(writer)),
weak_factory_(this) {
protos::pbzero::AndroidPolledStateConfig::Decoder cfg(
ds_config.android_polled_state_config_raw());
poll_period_ms_ = cfg.poll_ms();
if (poll_period_ms_ > 0 && poll_period_ms_ < 100) {
PERFETTO_ILOG("poll_ms %" PRIu32
" is less than minimum of 100ms. Increasing to 100ms.",
poll_period_ms_);
poll_period_ms_ = 100;
}
}
void InitialDisplayStateDataSource::Start() {
Tick();
}
base::WeakPtr<InitialDisplayStateDataSource>
InitialDisplayStateDataSource::GetWeakPtr() const {
return weak_factory_.GetWeakPtr();
}
void InitialDisplayStateDataSource::Tick() {
if (poll_period_ms_) {
auto weak_this = GetWeakPtr();
uint32_t delay_ms =
poll_period_ms_ - (base::GetWallTimeMs().count() % poll_period_ms_);
task_runner_->PostDelayedTask(
[weak_this]() -> void {
if (weak_this) {
weak_this->Tick();
}
},
delay_ms);
}
WriteState();
}
void InitialDisplayStateDataSource::WriteState() {
auto packet = writer_->NewTracePacket();
packet->set_timestamp(static_cast<uint64_t>(base::GetBootTimeNs().count()));
const base::Optional<std::string> screen_state_str =
ReadProperty("debug.tracing.screen_state");
const base::Optional<std::string> screen_brightness_str =
ReadProperty("debug.tracing.screen_brightness");
const base::Optional<int> screen_state =
screen_state_str ? base::StringToInt32(*screen_state_str) : base::nullopt;
const base::Optional<double> screen_brightness =
screen_brightness_str ? base::StringToDouble(*screen_brightness_str)
: base::nullopt;
if (screen_state || screen_brightness) {
auto* state = packet->set_initial_display_state();
if (screen_state) {
state->set_display_state(*screen_state);
}
if (screen_brightness) {
state->set_brightness(*screen_brightness);
}
}
packet->Finalize();
writer_->Flush();
}
#if PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
const base::Optional<std::string> InitialDisplayStateDataSource::ReadProperty(
const std::string name) {
char value[PROP_VALUE_MAX];
if (__system_property_get(name.c_str(), value)) {
return base::make_optional(value);
} else {
PERFETTO_ELOG("Unable to read %s", name.c_str());
return base::nullopt;
}
}
#else
const base::Optional<std::string> InitialDisplayStateDataSource::ReadProperty(
const std::string name __attribute__((unused))) {
PERFETTO_ELOG("Initial display state only supported on Android.");
return base::nullopt;
}
#endif
void InitialDisplayStateDataSource::Flush(FlushRequestID,
std::function<void()> callback) {
writer_->Flush(callback);
}
} // namespace perfetto
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