2021-08-02 1.更新

JLChen

2021-08-02 38f4fb064df09f344fc3237409c76a9fba2a8a9e

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/*
 * Copyright (c) 2010-2020 Belledonne Communications SARL.
 *
 * This file is part of linphone-iphone
 *
 * This program 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.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#import "VideoZoomHandler.h"
#include "linphone/linphonecore.h"
#import "LinphoneManager.h"
 
@implementation VideoZoomHandler
 
- (void)zoomInOut:(UITapGestureRecognizer *)reco {
    if (zoomLevel != 1)
        zoomLevel = 1;
    else
        zoomLevel = 2;
 
    if (zoomLevel != 1) {
        CGPoint point = [reco locationInView:videoView];
        cx = point.x / videoView.frame.size.width;
        cy = 1 - point.y / videoView.frame.size.height;
    } else {
        cx = cy = 0.5;
    }
    linphone_call_zoom_video(linphone_core_get_current_call(LC), zoomLevel, &cx, &cy);
}
 
- (void)videoPan:(UIPanGestureRecognizer *)reco {
    if (zoomLevel <= 1.0)
        return;
 
    float x, y;
    CGPoint translation = [reco translationInView:videoView];
    if ([reco state] == UIGestureRecognizerStateEnded) {
        cx -= translation.x / videoView.frame.size.width;
        cy += translation.y / videoView.frame.size.height;
        x = cx;
        y = cy;
    } else if ([reco state] == UIGestureRecognizerStateChanged) {
        x = cx - translation.x / videoView.frame.size.width;
        y = cy + translation.y / videoView.frame.size.height;
        [reco setTranslation:CGPointMake(0, 0) inView:videoView];
    } else {
        return;
    }
 
    linphone_call_zoom_video(linphone_core_get_current_call(LC), zoomLevel, &x, &y);
    cx = x;
    cy = y;
}
 
- (void)pinch:(UIPinchGestureRecognizer *)reco {
    float s = zoomLevel;
    // CGPoint point = [reco locationInView:videoGroup];
    // float ccx = cx + (point.x / videoGroup.frame.size.width - 0.5) / s;
    // float ccy = cy - (point.y / videoGroup.frame.size.height - 0.5) / s;
    if ([reco state] == UIGestureRecognizerStateEnded) {
        zoomLevel = MAX(MIN(zoomLevel * reco.scale, 3.0), 1.0);
        s = zoomLevel;
        // cx = ccx;
        // cy = ccy;
    } else if ([reco state] == UIGestureRecognizerStateChanged) {
        s = zoomLevel * reco.scale;
        s = MAX(MIN(s, 3.0), 1.0);
    } else if ([reco state] == UIGestureRecognizerStateBegan) {
 
    } else {
        return;
    }
 
    linphone_call_zoom_video(linphone_core_get_current_call(LC), s, &cx, &cy);
}
 
- (void)resetZoom {
    zoomLevel = 1;
    cx = cy = 0.5;
}
 
- (void)setup:(UIView *)view {
    videoView = view;
 
    UITapGestureRecognizer *doubleFingerTap =
        [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(zoomInOut:)];
    [doubleFingerTap setNumberOfTapsRequired:2];
    [doubleFingerTap setNumberOfTouchesRequired:1];
    [videoView addGestureRecognizer:doubleFingerTap];
 
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(videoPan:)];
    [videoView addGestureRecognizer:pan];
    UIPinchGestureRecognizer *pinchReco =
        [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
    [videoView addGestureRecognizer:pinchReco];
 
    [self resetZoom];
}
 
@end