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

use std::io::{Read, Seek, SeekFrom, Write};
use serde::{Serialize};

use crate::mp4box::*;
use crate::mp4box::{hdlr::HdlrBox, mdhd::MdhdBox, minf::MinfBox};

#[derive(Debug, Clone, PartialEq, Default, Serialize)]
pub struct MdiaBox {
    pub mdhd: MdhdBox,
    pub hdlr: HdlrBox,
    pub minf: MinfBox,
}

impl MdiaBox {
    pub fn get_type(&self) -> BoxType {
        BoxType::MdiaBox
    }

    pub fn get_size(&self) -> u64 {
        HEADER_SIZE + self.mdhd.box_size() + self.hdlr.box_size() + self.minf.box_size()
    }
}

impl Mp4Box for MdiaBox {
    fn box_type(&self) -> BoxType {
        return self.get_type();
    }

    fn box_size(&self) -> u64 {
        return self.get_size();
    }

    fn to_json(&self) -> Result<String> {
        Ok(serde_json::to_string(&self).unwrap())
    }

    fn summary(&self) -> Result<String> {
        let s = format!("");
        Ok(s)
    }
}

impl<R: Read + Seek> ReadBox<&mut R> for MdiaBox {
    fn read_box(reader: &mut R, size: u64) -> Result<Self> {
        let start = box_start(reader)?;

        let mut mdhd = None;
        let mut hdlr = None;
        let mut minf = None;

        let mut current = reader.seek(SeekFrom::Current(0))?;
        let end = start + size;
        while current < end {
            // Get box header.
            let header = BoxHeader::read(reader)?;
            let BoxHeader { name, size: s } = header;

            match name {
                BoxType::MdhdBox => {
                    mdhd = Some(MdhdBox::read_box(reader, s)?);
                }
                BoxType::HdlrBox => {
                    hdlr = Some(HdlrBox::read_box(reader, s)?);
                }
                BoxType::MinfBox => {
                    minf = Some(MinfBox::read_box(reader, s)?);
                }
                _ => {
                    // XXX warn!()
                    skip_box(reader, s)?;
                }
            }

            current = reader.seek(SeekFrom::Current(0))?;
        }

        if mdhd.is_none() {
            return Err(Error::BoxNotFound(BoxType::MdhdBox));
        }
        if hdlr.is_none() {
            return Err(Error::BoxNotFound(BoxType::HdlrBox));
        }
        if minf.is_none() {
            return Err(Error::BoxNotFound(BoxType::MinfBox));
        }

        skip_bytes_to(reader, start + size)?;

        Ok(MdiaBox {
            mdhd: mdhd.unwrap(),
            hdlr: hdlr.unwrap(),
            minf: minf.unwrap(),
        })
    }
}

impl<W: Write> WriteBox<&mut W> for MdiaBox {
    fn write_box(&self, writer: &mut W) -> Result<u64> {
        let size = self.box_size();
        BoxHeader::new(self.box_type(), size).write(writer)?;

        self.mdhd.write_box(writer)?;
        self.hdlr.write_box(writer)?;
        self.minf.write_box(writer)?;

        Ok(size)
    }
}