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