mirror of
https://github.com/alfg/mp4-rust.git
synced 2024-05-20 01:08:06 +00:00
187 lines
5.2 KiB
Rust
187 lines
5.2 KiB
Rust
use byteorder::{BigEndian, WriteBytesExt};
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use serde::Serialize;
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use std::io::Write;
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use crate::mp4box::*;
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#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
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pub struct Tx3gBox {
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pub data_reference_index: u16,
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pub display_flags: u32,
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pub horizontal_justification: i8,
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pub vertical_justification: i8,
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pub bg_color_rgba: RgbaColor,
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pub box_record: [i16; 4],
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pub style_record: [u8; 12],
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}
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#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize)]
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pub struct RgbaColor {
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pub red: u8,
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pub green: u8,
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pub blue: u8,
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pub alpha: u8,
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}
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impl Default for Tx3gBox {
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fn default() -> Self {
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Tx3gBox {
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data_reference_index: 0,
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display_flags: 0,
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horizontal_justification: 1,
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vertical_justification: -1,
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bg_color_rgba: RgbaColor {
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red: 0,
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green: 0,
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blue: 0,
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alpha: 255,
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},
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box_record: [0, 0, 0, 0],
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style_record: [0, 0, 0, 0, 0, 1, 0, 16, 255, 255, 255, 255],
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}
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}
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}
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impl Tx3gBox {
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pub fn get_type(&self) -> BoxType {
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BoxType::Tx3gBox
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}
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pub fn get_size(&self) -> u64 {
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HEADER_SIZE + 6 + 32
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}
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}
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impl Mp4Box for Tx3gBox {
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const TYPE: BoxType = BoxType::Tx3gBox;
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fn box_size(&self) -> u64 {
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self.get_size()
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}
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fn to_json(&self) -> Result<String> {
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Ok(serde_json::to_string(&self).unwrap())
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}
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fn summary(&self) -> Result<String> {
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let s = format!("data_reference_index={} horizontal_justification={} vertical_justification={} rgba={}{}{}{}",
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self.data_reference_index, self.horizontal_justification,
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self.vertical_justification, self.bg_color_rgba.red,
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self.bg_color_rgba.green, self.bg_color_rgba.blue, self.bg_color_rgba.alpha);
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Ok(s)
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}
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}
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impl BlockReader for Tx3gBox {
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fn read_block<'a>(reader: &mut impl Reader<'a>) -> Result<Self> {
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reader.get_u32(); // reserved
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reader.get_u16(); // reserved
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let data_reference_index = reader.get_u16();
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let display_flags = reader.get_u32();
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let horizontal_justification = reader.get_i8();
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let vertical_justification = reader.get_i8();
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let bg_color_rgba = RgbaColor {
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red: reader.get_u8(),
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green: reader.get_u8(),
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blue: reader.get_u8(),
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alpha: reader.get_u8(),
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};
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let box_record: [i16; 4] = [
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reader.get_i16(),
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reader.get_i16(),
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reader.get_i16(),
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reader.get_i16(),
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];
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let style_record: [u8; 12] = [
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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reader.get_u8(),
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];
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Ok(Tx3gBox {
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data_reference_index,
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display_flags,
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horizontal_justification,
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vertical_justification,
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bg_color_rgba,
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box_record,
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style_record,
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})
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}
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fn size_hint() -> usize {
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34
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}
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}
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impl<W: Write> WriteBox<&mut W> for Tx3gBox {
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fn write_box(&self, writer: &mut W) -> Result<u64> {
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let size = self.box_size();
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BoxHeader::new(Self::TYPE, size).write(writer)?;
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writer.write_u32::<BigEndian>(0)?; // reserved
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writer.write_u16::<BigEndian>(0)?; // reserved
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writer.write_u16::<BigEndian>(self.data_reference_index)?;
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writer.write_u32::<BigEndian>(self.display_flags)?;
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writer.write_i8(self.horizontal_justification)?;
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writer.write_i8(self.vertical_justification)?;
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writer.write_u8(self.bg_color_rgba.red)?;
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writer.write_u8(self.bg_color_rgba.green)?;
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writer.write_u8(self.bg_color_rgba.blue)?;
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writer.write_u8(self.bg_color_rgba.alpha)?;
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for n in 0..4 {
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writer.write_i16::<BigEndian>(self.box_record[n])?;
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}
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for n in 0..12 {
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writer.write_u8(self.style_record[n])?;
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}
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Ok(size)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::mp4box::BoxHeader;
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#[test]
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fn test_tx3g() {
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let src_box = Tx3gBox {
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data_reference_index: 1,
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display_flags: 0,
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horizontal_justification: 1,
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vertical_justification: -1,
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bg_color_rgba: RgbaColor {
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red: 0,
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green: 0,
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blue: 0,
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alpha: 255,
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},
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box_record: [0, 0, 0, 0],
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style_record: [0, 0, 0, 0, 0, 1, 0, 16, 255, 255, 255, 255],
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};
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let mut buf = Vec::new();
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src_box.write_box(&mut buf).unwrap();
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assert_eq!(buf.len(), src_box.box_size() as usize);
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let mut reader = buf.as_slice();
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let header = BoxHeader::read_sync(&mut reader).unwrap().unwrap();
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assert_eq!(header.kind, BoxType::Tx3gBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = Tx3gBox::read_block(&mut reader).unwrap();
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assert_eq!(src_box, dst_box);
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}
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}
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