use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
use serde::Serialize;
use std::io::{Read, Seek, Write};
use crate::mp4box::*;
pub enum TrackFlag {
TrackEnabled = 0x000001,
}
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
pub struct TkhdBox {
pub version: u8,
pub flags: u32,
pub creation_time: u64,
pub modification_time: u64,
pub track_id: u32,
pub duration: u64,
pub layer: u16,
pub alternate_group: u16,
#[serde(with = "value_u8")]
pub volume: FixedPointU8,
pub matrix: Matrix,
#[serde(with = "value_u32")]
pub width: FixedPointU16,
#[serde(with = "value_u32")]
pub height: FixedPointU16,
}
impl Default for TkhdBox {
fn default() -> Self {
TkhdBox {
version: 0,
flags: TrackFlag::TrackEnabled as u32,
creation_time: 0,
modification_time: 0,
track_id: 0,
duration: 0,
layer: 0,
alternate_group: 0,
volume: FixedPointU8::new(1),
matrix: Matrix::default(),
width: FixedPointU16::new(0),
height: FixedPointU16::new(0),
}
}
}
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
pub struct Matrix {
pub a: i32,
pub b: i32,
pub u: i32,
pub c: i32,
pub d: i32,
pub v: i32,
pub x: i32,
pub y: i32,
pub w: i32,
}
impl std::fmt::Display for Matrix {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{:#x} {:#x} {:#x} {:#x} {:#x} {:#x} {:#x} {:#x} {:#x}",
self.a, self.b, self.u, self.c, self.d, self.v, self.x, self.y, self.w
)
}
}
impl Default for Matrix {
fn default() -> Self {
Self {
a: 0x00010000,
b: 0,
u: 0,
c: 0,
d: 0x00010000,
v: 0,
x: 0,
y: 0,
w: 0x40000000,
}
}
}
impl TkhdBox {
pub fn get_type(&self) -> BoxType {
BoxType::TkhdBox
}
pub fn get_size(&self) -> u64 {
let mut size = HEADER_SIZE + HEADER_EXT_SIZE;
if self.version == 1 {
size += 32;
} else if self.version == 0 {
size += 20;
}
size += 60;
size
}
pub fn set_width(&mut self, width: u16) {
self.width = FixedPointU16::new(width);
}
pub fn set_height(&mut self, height: u16) {
self.height = FixedPointU16::new(height);
}
}
impl Mp4Box for TkhdBox {
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!(
"creation_time={} track_id={} duration={} layer={} volume={} matrix={} width={} height={}",
self.creation_time,
self.track_id,
self.duration,
self.layer,
self.volume.value(),
self.matrix,
self.width.value(),
self.height.value()
);
Ok(s)
}
}
impl<R: Read + Seek> ReadBox<&mut R> for TkhdBox {
fn read_box(reader: &mut R, size: u64) -> Result<Self> {
let start = box_start(reader)?;
let (version, flags) = read_box_header_ext(reader)?;
let (creation_time, modification_time, track_id, _, duration) = if version == 1 {
(
reader.read_u64::<BigEndian>()?,
reader.read_u64::<BigEndian>()?,
reader.read_u32::<BigEndian>()?,
reader.read_u32::<BigEndian>()?,
reader.read_u64::<BigEndian>()?,
)
} else if version == 0 {
(
reader.read_u32::<BigEndian>()? as u64,
reader.read_u32::<BigEndian>()? as u64,
reader.read_u32::<BigEndian>()?,
reader.read_u32::<BigEndian>()?,
reader.read_u32::<BigEndian>()? as u64,
)
} else {
return Err(Error::InvalidData("version must be 0 or 1"));
};
reader.read_u64::<BigEndian>()?; let layer = reader.read_u16::<BigEndian>()?;
let alternate_group = reader.read_u16::<BigEndian>()?;
let volume = FixedPointU8::new_raw(reader.read_u16::<BigEndian>()?);
reader.read_u16::<BigEndian>()?; let matrix = Matrix {
a: reader.read_i32::<BigEndian>()?,
b: reader.read_i32::<BigEndian>()?,
u: reader.read_i32::<BigEndian>()?,
c: reader.read_i32::<BigEndian>()?,
d: reader.read_i32::<BigEndian>()?,
v: reader.read_i32::<BigEndian>()?,
x: reader.read_i32::<BigEndian>()?,
y: reader.read_i32::<BigEndian>()?,
w: reader.read_i32::<BigEndian>()?,
};
let width = FixedPointU16::new_raw(reader.read_u32::<BigEndian>()?);
let height = FixedPointU16::new_raw(reader.read_u32::<BigEndian>()?);
skip_bytes_to(reader, start + size)?;
Ok(TkhdBox {
version,
flags,
creation_time,
modification_time,
track_id,
duration,
layer,
alternate_group,
volume,
matrix,
width,
height,
})
}
}
impl<W: Write> WriteBox<&mut W> for TkhdBox {
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.version == 1 {
writer.write_u64::<BigEndian>(self.creation_time)?;
writer.write_u64::<BigEndian>(self.modification_time)?;
writer.write_u32::<BigEndian>(self.track_id)?;
writer.write_u32::<BigEndian>(0)?; writer.write_u64::<BigEndian>(self.duration)?;
} else if self.version == 0 {
writer.write_u32::<BigEndian>(self.creation_time as u32)?;
writer.write_u32::<BigEndian>(self.modification_time as u32)?;
writer.write_u32::<BigEndian>(self.track_id)?;
writer.write_u32::<BigEndian>(0)?; writer.write_u32::<BigEndian>(self.duration as u32)?;
} else {
return Err(Error::InvalidData("version must be 0 or 1"));
}
writer.write_u64::<BigEndian>(0)?; writer.write_u16::<BigEndian>(self.layer)?;
writer.write_u16::<BigEndian>(self.alternate_group)?;
writer.write_u16::<BigEndian>(self.volume.raw_value())?;
writer.write_u16::<BigEndian>(0)?;
writer.write_i32::<BigEndian>(self.matrix.a)?;
writer.write_i32::<BigEndian>(self.matrix.b)?;
writer.write_i32::<BigEndian>(self.matrix.u)?;
writer.write_i32::<BigEndian>(self.matrix.c)?;
writer.write_i32::<BigEndian>(self.matrix.d)?;
writer.write_i32::<BigEndian>(self.matrix.v)?;
writer.write_i32::<BigEndian>(self.matrix.x)?;
writer.write_i32::<BigEndian>(self.matrix.y)?;
writer.write_i32::<BigEndian>(self.matrix.w)?;
writer.write_u32::<BigEndian>(self.width.raw_value())?;
writer.write_u32::<BigEndian>(self.height.raw_value())?;
Ok(size)
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::mp4box::BoxHeader;
use std::io::Cursor;
#[test]
fn test_tkhd32() {
let src_box = TkhdBox {
version: 0,
flags: TrackFlag::TrackEnabled as u32,
creation_time: 100,
modification_time: 200,
track_id: 1,
duration: 634634,
layer: 0,
alternate_group: 0,
volume: FixedPointU8::new(1),
matrix: Matrix::default(),
width: FixedPointU16::new(512),
height: FixedPointU16::new(288),
};
let mut buf = Vec::new();
src_box.write_box(&mut buf).unwrap();
assert_eq!(buf.len(), src_box.box_size() as usize);
let mut reader = Cursor::new(&buf);
let header = BoxHeader::read(&mut reader).unwrap();
assert_eq!(header.name, BoxType::TkhdBox);
assert_eq!(src_box.box_size(), header.size);
let dst_box = TkhdBox::read_box(&mut reader, header.size).unwrap();
assert_eq!(src_box, dst_box);
}
#[test]
fn test_tkhd64() {
let src_box = TkhdBox {
version: 1,
flags: TrackFlag::TrackEnabled as u32,
creation_time: 100,
modification_time: 200,
track_id: 1,
duration: 634634,
layer: 0,
alternate_group: 0,
volume: FixedPointU8::new(1),
matrix: Matrix::default(),
width: FixedPointU16::new(512),
height: FixedPointU16::new(288),
};
let mut buf = Vec::new();
src_box.write_box(&mut buf).unwrap();
assert_eq!(buf.len(), src_box.box_size() as usize);
let mut reader = Cursor::new(&buf);
let header = BoxHeader::read(&mut reader).unwrap();
assert_eq!(header.name, BoxType::TkhdBox);
assert_eq!(src_box.box_size(), header.size);
let dst_box = TkhdBox::read_box(&mut reader, header.size).unwrap();
assert_eq!(src_box, dst_box);
}
}