use serde::Serialize;
use std::io::{Read, Seek, Write};
use crate::mp4box::*;
#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize)]
pub struct DinfBox {
dref: DrefBox,
}
impl DinfBox {
pub fn get_type(&self) -> BoxType {
BoxType::DinfBox
}
pub fn get_size(&self) -> u64 {
HEADER_SIZE + self.dref.box_size()
}
}
impl Mp4Box for DinfBox {
fn box_type(&self) -> BoxType {
self.get_type()
}
fn box_size(&self) -> u64 {
self.get_size()
}
fn to_json(&self) -> Result<String> {
Ok(serde_json::to_string(&self).unwrap())
}
fn summary(&self) -> Result<String> {
let s = String::new();
Ok(s)
}
}
impl<R: Read + Seek> ReadBox<&mut R> for DinfBox {
fn read_box(reader: &mut R, size: u64) -> Result<Self> {
let start = box_start(reader)?;
let mut dref = None;
let mut current = reader.stream_position()?;
let end = start + size;
while current < end {
let header = BoxHeader::read(reader)?;
let BoxHeader { name, size: s } = header;
if s > size {
return Err(Error::InvalidData(
"dinf box contains a box with a larger size than it",
));
}
match name {
BoxType::DrefBox => {
dref = Some(DrefBox::read_box(reader, s)?);
}
_ => {
skip_box(reader, s)?;
}
}
current = reader.stream_position()?;
}
if dref.is_none() {
return Err(Error::BoxNotFound(BoxType::DrefBox));
}
skip_bytes_to(reader, start + size)?;
Ok(DinfBox {
dref: dref.unwrap(),
})
}
}
impl<W: Write> WriteBox<&mut W> for DinfBox {
fn write_box(&self, writer: &mut W) -> Result<u64> {
let size = self.box_size();
BoxHeader::new(self.box_type(), size).write(writer)?;
self.dref.write_box(writer)?;
Ok(size)
}
}
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
pub struct DrefBox {
pub version: u8,
pub flags: u32,
#[serde(skip_serializing_if = "Option::is_none")]
pub url: Option<UrlBox>,
}
impl Default for DrefBox {
fn default() -> Self {
DrefBox {
version: 0,
flags: 0,
url: Some(UrlBox::default()),
}
}
}
impl DrefBox {
pub fn get_type(&self) -> BoxType {
BoxType::DrefBox
}
pub fn get_size(&self) -> u64 {
let mut size = HEADER_SIZE + HEADER_EXT_SIZE + 4;
if let Some(ref url) = self.url {
size += url.box_size();
}
size
}
}
impl Mp4Box for DrefBox {
fn box_type(&self) -> BoxType {
self.get_type()
}
fn box_size(&self) -> u64 {
self.get_size()
}
fn to_json(&self) -> Result<String> {
Ok(serde_json::to_string(&self).unwrap())
}
fn summary(&self) -> Result<String> {
let s = String::new();
Ok(s)
}
}
impl<R: Read + Seek> ReadBox<&mut R> for DrefBox {
fn read_box(reader: &mut R, size: u64) -> Result<Self> {
let start = box_start(reader)?;
let mut current = reader.stream_position()?;
let (version, flags) = read_box_header_ext(reader)?;
let end = start + size;
let mut url = None;
let entry_count = reader.read_u32::<BigEndian>()?;
for _i in 0..entry_count {
if current >= end {
break;
}
let header = BoxHeader::read(reader)?;
let BoxHeader { name, size: s } = header;
if s > size {
return Err(Error::InvalidData(
"dinf box contains a box with a larger size than it",
));
}
match name {
BoxType::UrlBox => {
url = Some(UrlBox::read_box(reader, s)?);
}
_ => {
skip_box(reader, s)?;
}
}
current = reader.stream_position()?;
}
skip_bytes_to(reader, start + size)?;
Ok(DrefBox {
version,
flags,
url,
})
}
}
impl<W: Write> WriteBox<&mut W> for DrefBox {
fn write_box(&self, writer: &mut W) -> Result<u64> {
let size = self.box_size();
BoxHeader::new(self.box_type(), size).write(writer)?;
write_box_header_ext(writer, self.version, self.flags)?;
writer.write_u32::<BigEndian>(1)?;
if let Some(ref url) = self.url {
url.write_box(writer)?;
}
Ok(size)
}
}
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
pub struct UrlBox {
pub version: u8,
pub flags: u32,
pub location: String,
}
impl Default for UrlBox {
fn default() -> Self {
UrlBox {
version: 0,
flags: 1,
location: String::default(),
}
}
}
impl UrlBox {
pub fn get_type(&self) -> BoxType {
BoxType::UrlBox
}
pub fn get_size(&self) -> u64 {
let mut size = HEADER_SIZE + HEADER_EXT_SIZE;
if !self.location.is_empty() {
size += self.location.bytes().len() as u64 + 1;
}
size
}
}
impl Mp4Box for UrlBox {
fn box_type(&self) -> BoxType {
self.get_type()
}
fn box_size(&self) -> u64 {
self.get_size()
}
fn to_json(&self) -> Result<String> {
Ok(serde_json::to_string(&self).unwrap())
}
fn summary(&self) -> Result<String> {
let s = format!("location={}", self.location);
Ok(s)
}
}
impl<R: Read + Seek> ReadBox<&mut R> for UrlBox {
fn read_box(reader: &mut R, size: u64) -> Result<Self> {
let start = box_start(reader)?;
let (version, flags) = read_box_header_ext(reader)?;
let location = if size.saturating_sub(HEADER_SIZE + HEADER_EXT_SIZE) > 0 {
let buf_size = size - HEADER_SIZE - HEADER_EXT_SIZE - 1;
let mut buf = vec![0u8; buf_size as usize];
reader.read_exact(&mut buf)?;
match String::from_utf8(buf) {
Ok(t) => {
if t.len() != buf_size as usize {
return Err(Error::InvalidData("string too small"));
}
t
}
_ => String::default(),
}
} else {
String::default()
};
skip_bytes_to(reader, start + size)?;
Ok(UrlBox {
version,
flags,
location,
})
}
}
impl<W: Write> WriteBox<&mut W> for UrlBox {
fn write_box(&self, writer: &mut W) -> Result<u64> {
let size = self.box_size();
BoxHeader::new(self.box_type(), size).write(writer)?;
write_box_header_ext(writer, self.version, self.flags)?;
if !self.location.is_empty() {
writer.write_all(self.location.as_bytes())?;
writer.write_u8(0)?;
}
Ok(size)
}
}