mp4/mp4box/
stbl.rs

1use serde::Serialize;
2use std::io::{Read, Seek, Write};
3
4use crate::mp4box::*;
5use crate::mp4box::{
6    co64::Co64Box, ctts::CttsBox, stco::StcoBox, stsc::StscBox, stsd::StsdBox, stss::StssBox,
7    stsz::StszBox, stts::SttsBox,
8};
9
10#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize)]
11pub struct StblBox {
12    pub stsd: StsdBox,
13    pub stts: SttsBox,
14
15    #[serde(skip_serializing_if = "Option::is_none")]
16    pub ctts: Option<CttsBox>,
17
18    #[serde(skip_serializing_if = "Option::is_none")]
19    pub stss: Option<StssBox>,
20    pub stsc: StscBox,
21    pub stsz: StszBox,
22
23    #[serde(skip_serializing_if = "Option::is_none")]
24    pub stco: Option<StcoBox>,
25
26    #[serde(skip_serializing_if = "Option::is_none")]
27    pub co64: Option<Co64Box>,
28}
29
30impl StblBox {
31    pub fn get_type(&self) -> BoxType {
32        BoxType::StblBox
33    }
34
35    pub fn get_size(&self) -> u64 {
36        let mut size = HEADER_SIZE;
37        size += self.stsd.box_size();
38        size += self.stts.box_size();
39        if let Some(ref ctts) = self.ctts {
40            size += ctts.box_size();
41        }
42        if let Some(ref stss) = self.stss {
43            size += stss.box_size();
44        }
45        size += self.stsc.box_size();
46        size += self.stsz.box_size();
47        if let Some(ref stco) = self.stco {
48            size += stco.box_size();
49        }
50        if let Some(ref co64) = self.co64 {
51            size += co64.box_size();
52        }
53        size
54    }
55}
56
57impl Mp4Box for StblBox {
58    fn box_type(&self) -> BoxType {
59        self.get_type()
60    }
61
62    fn box_size(&self) -> u64 {
63        self.get_size()
64    }
65
66    fn to_json(&self) -> Result<String> {
67        Ok(serde_json::to_string(&self).unwrap())
68    }
69
70    fn summary(&self) -> Result<String> {
71        let s = String::new();
72        Ok(s)
73    }
74}
75
76impl<R: Read + Seek> ReadBox<&mut R> for StblBox {
77    fn read_box(reader: &mut R, size: u64) -> Result<Self> {
78        let start = box_start(reader)?;
79
80        let mut stsd = None;
81        let mut stts = None;
82        let mut ctts = None;
83        let mut stss = None;
84        let mut stsc = None;
85        let mut stsz = None;
86        let mut stco = None;
87        let mut co64 = None;
88
89        let mut current = reader.stream_position()?;
90        let end = start + size;
91        while current < end {
92            // Get box header.
93            let header = BoxHeader::read(reader)?;
94            let BoxHeader { name, size: s } = header;
95            if s > size {
96                return Err(Error::InvalidData(
97                    "stbl box contains a box with a larger size than it",
98                ));
99            }
100
101            match name {
102                BoxType::StsdBox => {
103                    stsd = Some(StsdBox::read_box(reader, s)?);
104                }
105                BoxType::SttsBox => {
106                    stts = Some(SttsBox::read_box(reader, s)?);
107                }
108                BoxType::CttsBox => {
109                    ctts = Some(CttsBox::read_box(reader, s)?);
110                }
111                BoxType::StssBox => {
112                    stss = Some(StssBox::read_box(reader, s)?);
113                }
114                BoxType::StscBox => {
115                    stsc = Some(StscBox::read_box(reader, s)?);
116                }
117                BoxType::StszBox => {
118                    stsz = Some(StszBox::read_box(reader, s)?);
119                }
120                BoxType::StcoBox => {
121                    stco = Some(StcoBox::read_box(reader, s)?);
122                }
123                BoxType::Co64Box => {
124                    co64 = Some(Co64Box::read_box(reader, s)?);
125                }
126                _ => {
127                    // XXX warn!()
128                    skip_box(reader, s)?;
129                }
130            }
131            current = reader.stream_position()?;
132        }
133
134        if stsd.is_none() {
135            return Err(Error::BoxNotFound(BoxType::StsdBox));
136        }
137        if stts.is_none() {
138            return Err(Error::BoxNotFound(BoxType::SttsBox));
139        }
140        if stsc.is_none() {
141            return Err(Error::BoxNotFound(BoxType::StscBox));
142        }
143        if stsz.is_none() {
144            return Err(Error::BoxNotFound(BoxType::StszBox));
145        }
146        if stco.is_none() && co64.is_none() {
147            return Err(Error::Box2NotFound(BoxType::StcoBox, BoxType::Co64Box));
148        }
149
150        skip_bytes_to(reader, start + size)?;
151
152        Ok(StblBox {
153            stsd: stsd.unwrap(),
154            stts: stts.unwrap(),
155            ctts,
156            stss,
157            stsc: stsc.unwrap(),
158            stsz: stsz.unwrap(),
159            stco,
160            co64,
161        })
162    }
163}
164
165impl<W: Write> WriteBox<&mut W> for StblBox {
166    fn write_box(&self, writer: &mut W) -> Result<u64> {
167        let size = self.box_size();
168        BoxHeader::new(self.box_type(), size).write(writer)?;
169
170        self.stsd.write_box(writer)?;
171        self.stts.write_box(writer)?;
172        if let Some(ref ctts) = self.ctts {
173            ctts.write_box(writer)?;
174        }
175        if let Some(ref stss) = self.stss {
176            stss.write_box(writer)?;
177        }
178        self.stsc.write_box(writer)?;
179        self.stsz.write_box(writer)?;
180        if let Some(ref stco) = self.stco {
181            stco.write_box(writer)?;
182        }
183        if let Some(ref co64) = self.co64 {
184            co64.write_box(writer)?;
185        }
186
187        Ok(size)
188    }
189}
mp4/mp4box/stbl.rs

mp4/mp4box/
stbl.rs
