tdesktop/Telegram/SourceFiles/media/view/media_clip_playback.cpp

124 lines
3.2 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "media/view/media_clip_playback.h"
#include "styles/style_mediaview.h"
#include "media/media_audio.h"
namespace Media {
namespace Clip {
namespace {
constexpr auto kPlaybackAnimationDurationMs = TimeMs(200);
} // namespace
Playback::Playback() : _a_value(animation(this, &Playback::step_value)) {
}
void Playback::updateState(const Player::TrackState &state) {
qint64 position = 0, length = state.length;
auto wasInLoadingState = _inLoadingState;
if (wasInLoadingState) {
_inLoadingState = false;
if (_inLoadingStateChanged) {
_inLoadingStateChanged(false);
}
}
_playing = !Player::IsStopped(state.state);
if (Player::IsStoppedAtEnd(state.state)) {
position = state.length;
} else if (!Player::IsStoppedOrStopping(state.state)) {
position = state.position;
} else {
position = 0;
}
auto progress = 0.;
if (position > length) {
progress = 1.;
} else if (length) {
progress = snap(float64(position) / length, 0., 1.);
}
auto animatedPosition = position + (state.frequency * kPlaybackAnimationDurationMs / 1000);
auto animatedProgress = length ? qMax(float64(animatedPosition) / length, 0.) : 0.;
if (length != _length || position != _position || wasInLoadingState) {
if (auto animated = (length && _length && animatedProgress > value())) {
setValue(animatedProgress, animated);
} else {
setValue(progress, animated);
}
_position = position;
_length = length;
}
}
void Playback::updateLoadingState(float64 progress) {
if (!_inLoadingState) {
_inLoadingState = true;
if (_inLoadingStateChanged) {
_inLoadingStateChanged(true);
}
}
auto animated = (progress > value());
setValue(progress, animated);
}
float64 Playback::value() const {
return qMin(a_value.current(), 1.);
}
float64 Playback::value(TimeMs ms) {
_a_value.step(ms);
return value();
}
void Playback::setValue(float64 value, bool animated) {
if (animated) {
a_value.start(value);
_a_value.start();
} else {
a_value = anim::value(value, value);
_a_value.stop();
}
if (_valueChanged) {
_valueChanged(a_value.current());
}
}
void Playback::step_value(float64 ms, bool timer) {
auto dt = ms / kPlaybackAnimationDurationMs;
if (dt >= 1.) {
_a_value.stop();
a_value.finish();
} else {
a_value.update(dt, anim::linear);
}
if (timer && _valueChanged) {
_valueChanged(a_value.current());
}
}
} // namespace Clip
} // namespace Media