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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/viz/service/frame_sinks/external_begin_frame_source_android.h"
#include "base/android/jni_android.h"
#include "jni/ExternalBeginFrameSourceAndroid_jni.h"
namespace viz {
ExternalBeginFrameSourceAndroid::ExternalBeginFrameSourceAndroid()
: ExternalBeginFrameSource(this),
j_object_(Java_ExternalBeginFrameSourceAndroid_Constructor(
base::android::AttachCurrentThread(),
reinterpret_cast<jlong>(this))) {}
ExternalBeginFrameSourceAndroid::~ExternalBeginFrameSourceAndroid() {
SetEnabled(false);
}
void ExternalBeginFrameSourceAndroid::OnVSync(
JNIEnv* env,
const base::android::JavaParamRef<jobject>& obj,
jlong time_micros,
jlong period_micros) {
// TODO(ericrk): This logic is ported from window_android.cc. Once OOP-D
// conversion is complete, we can delete the logic there.
// Warning: It is generally unsafe to manufacture TimeTicks values. The
// following assumption is being made, AND COULD EASILY BREAK AT ANY TIME:
// Upstream, Java code is providing "System.nanos() / 1000," and this is the
// same timestamp that would be provided by the CLOCK_MONOTONIC POSIX clock.
DCHECK_EQ(base::TimeTicks::GetClock(),
base::TimeTicks::Clock::LINUX_CLOCK_MONOTONIC);
base::TimeTicks frame_time =
base::TimeTicks() + base::TimeDelta::FromMicroseconds(time_micros);
base::TimeDelta vsync_period(
base::TimeDelta::FromMicroseconds(period_micros));
// Calculate the next frame deadline:
base::TimeTicks deadline = frame_time + vsync_period;
auto begin_frame_args = BeginFrameArgs::Create(
BEGINFRAME_FROM_HERE, source_id(), next_sequence_number_++, frame_time,
deadline, vsync_period, BeginFrameArgs::NORMAL);
OnBeginFrame(begin_frame_args);
}
void ExternalBeginFrameSourceAndroid::OnNeedsBeginFrames(
bool needs_begin_frames) {
SetEnabled(needs_begin_frames);
}
void ExternalBeginFrameSourceAndroid::SetEnabled(bool enabled) {
Java_ExternalBeginFrameSourceAndroid_setEnabled(
base::android::AttachCurrentThread(), j_object_, enabled);
}
} // namespace viz
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