effy 0.10.0

A small and friendly terminal FFmpeg helper that simplifies common tasks
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163

use tracing::{debug, warn};

use crate::{
    model::CropData,
    params::{Parameter, ParameterData, PresetParameter},
    visitors::{CommandBuilder, VisitorContext},
};

pub(crate) struct Crop;

impl Crop {
    pub(crate) const ID: &'static str = "crop";
    pub(crate) const NAME: &'static str = "Crop";

    pub fn new_parameter() -> Parameter {
        Parameter::new(
            Self::ID,
            Self::NAME,
            ParameterData::Crop(CropData {
                ..Default::default()
            }),
        )
    }

    pub fn build_command(cb: &mut CommandBuilder, data: &ParameterData) {
        if let ParameterData::Crop(crop_data) = data
            && !crop_data.is_empty()
        {
            debug!(?crop_data, "build_command");

            let (x, y, w, h) = crop_data.parse();
            let args = vec![format!("crop={}:{}:{}:{}", w, h, x, y)];
            debug!(?args, "crop args");
            cb.video_filters.extend(args);
        }
    }

    pub(crate) fn parse_preset(preset_value: &str) -> Option<(&str, &str, &str, &str)> {
        let s = preset_value.strip_prefix('x')?;
        let (x, s) = s.split_once('y')?;
        let (y, s) = s.split_once('w')?;
        let (w, h) = s.split_once('h')?;
        Some((x, y, w, h))
    }
}

impl<'a> PresetParameter<'a> for Crop {
    fn apply_preset(ctx: &VisitorContext, data: &mut ParameterData, preset_value: &str) {
        if let ParameterData::Crop(crop_data) = data {
            let Some((x, y, w, h)) = Self::parse_preset(preset_value) else {
                warn!("Crop preset has invalid format: {preset_value}");
                return;
            };
            let dimensions = ctx.input_dimensions.unwrap_or_default();
            if let Err(msg) = CropData::validate(x, y, w, h, dimensions) {
                warn!("Crop preset is not valid and will be skipped: {msg}");
            } else {
                let to_option = |s: &str| Some(s.to_owned()).filter(|s| !s.is_empty());
                *crop_data = CropData {
                    x: to_option(x),
                    y: to_option(y),
                    w: to_option(w),
                    h: to_option(h),
                };
            }
        }
    }

    fn save_preset(_ctx: &VisitorContext, data: &'a ParameterData) -> Option<String> {
        if let ParameterData::Crop(crop_data) = data {
            if crop_data.is_empty() {
                None
            } else {
                Some(format!(
                    "x{}y{}w{}h{}",
                    crop_data.x.as_deref().unwrap_or(""),
                    crop_data.y.as_deref().unwrap_or(""),
                    crop_data.w.as_deref().unwrap_or(""),
                    crop_data.h.as_deref().unwrap_or(""),
                ))
            }
        } else {
            None
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    fn apply_preset(preset: &str, dimensions: Option<(u32, u32)>) -> CropData {
        let ctx = VisitorContext {
            input_dimensions: dimensions,
            ..Default::default()
        };
        let mut data = ParameterData::Crop(CropData::default());
        Crop::apply_preset(&ctx, &mut data, preset);
        match data {
            ParameterData::Crop(c) => c,
            _ => panic!("Expected Crop data"),
        }
    }

    #[test]
    fn test_apply_crop_preset() {
        let crop = apply_preset("x10y20w100h200", Some((1920, 1080)));
        assert_eq!(crop.x.as_deref(), Some("10"));
        assert_eq!(crop.y.as_deref(), Some("20"));
        assert_eq!(crop.w.as_deref(), Some("100"));
        assert_eq!(crop.h.as_deref(), Some("200"));
    }

    #[test]
    fn test_apply_crop_preset_wh() {
        let crop = apply_preset("xyw100h200", Some((1920, 1080)));
        assert_eq!(crop.x, None);
        assert_eq!(crop.y, None);
        assert_eq!(crop.w.as_deref(), Some("100"));
        assert_eq!(crop.h.as_deref(), Some("200"));
    }

    #[test]
    fn test_apply_crop_preset_xw() {
        let crop = apply_preset("x10yw100h", Some((1920, 1080)));
        assert_eq!(crop.x.as_deref(), Some("10"));
        assert_eq!(crop.y, None);
        assert_eq!(crop.w.as_deref(), Some("100"));
        assert_eq!(crop.h, None);
    }

    #[test]
    fn test_apply_crop_preset_xy() {
        let crop = apply_preset("x10y20wh", Some((1920, 1080)));
        assert_eq!(crop.x.as_deref(), Some("10"));
        assert_eq!(crop.y.as_deref(), Some("20"));
        assert_eq!(crop.w, None);
        assert_eq!(crop.h, None);
    }

    #[test]
    fn test_save_and_apply_preset_save_apply() {
        let original = CropData {
            x: Some("50".to_string()),
            y: Some("60".to_string()),
            w: Some("300".to_string()),
            h: Some("400".to_string()),
        };
        let ctx = VisitorContext {
            input_dimensions: Some((1920, 1080)),
            ..Default::default()
        };
        let data = ParameterData::Crop(original.clone());
        let saved = Crop::save_preset(&ctx, &data).expect("save_preset failed");
        assert_eq!(saved, "x50y60w300h400");

        let applied = apply_preset(&saved, Some((1920, 1080)));
        assert_eq!(applied.x, original.x);
        assert_eq!(applied.y, original.y);
        assert_eq!(applied.w, original.w);
        assert_eq!(applied.h, original.h);
    }
}