From 9e6e4962f2346a3fbd96ab3e6c331858ef6ec0d1 Mon Sep 17 00:00:00 2001
From: Felix Kaaman <tmtu@tmtu.ee>
Date: Thu, 7 Jan 2021 20:32:49 +0100
Subject: Initial commit

---
 src/boxes/tfhd.rs | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 src/boxes/tfhd.rs

(limited to 'src/boxes/tfhd.rs')

diff --git a/src/boxes/tfhd.rs b/src/boxes/tfhd.rs
new file mode 100644
index 0000000..45c5301
--- /dev/null
+++ b/src/boxes/tfhd.rs
@@ -0,0 +1,131 @@
+use byteorder::{BigEndian, WriteBytesExt};
+use four_cc::FourCC;
+
+use bytes::{BufMut, BytesMut};
+
+use crate::{FullBoxHeader, Mp4Box, Mp4BoxError};
+
+use std::mem::size_of;
+
+bitflags::bitflags! {
+    pub struct TrackFragmentHeaderFlags: u32 {
+        const BASE_DATA_OFFSET_PRESENT = 0x000001;
+        const SAMPLE_DESCRIPTION_INDEX_PRESENT = 0x000002;
+        const DEFAULT_SAMPLE_DURATION_PRESENT = 0x000008;
+        const DEFAULT_SAMPLE_SIZE_PRESENT = 0x000010;
+        const DEFAULT_SAMPLE_FLAGS_PRESENT = 0x000020;
+        const DURATION_IS_EMPTY = 0x010000;
+        const DEFAULT_BASE_IS_MOOF = 0x020000;
+    }
+}
+
+pub struct TrackFragmentHeaderBox {
+    pub track_id: u32,
+    pub base_data_offset: Option<u64>,
+    pub sample_description_index: Option<u32>,
+    pub default_sample_duration: Option<u32>,
+    pub default_sample_size: Option<u32>,
+    pub default_sample_flags: Option<u32>,
+    pub duration_is_empty: bool,
+    pub default_base_is_moof: bool,
+}
+
+impl TrackFragmentHeaderBox {
+    fn flags_from_fields(&self) -> TrackFragmentHeaderFlags {
+        let mut flags = TrackFragmentHeaderFlags::empty();
+
+        if self.base_data_offset.is_some() {
+            flags.insert(TrackFragmentHeaderFlags::BASE_DATA_OFFSET_PRESENT);
+        }
+
+        if self.sample_description_index.is_some() {
+            flags.insert(TrackFragmentHeaderFlags::SAMPLE_DESCRIPTION_INDEX_PRESENT);
+        }
+
+        if self.default_sample_duration.is_some() {
+            flags.insert(TrackFragmentHeaderFlags::DEFAULT_SAMPLE_DURATION_PRESENT);
+        }
+
+        if self.default_sample_size.is_some() {
+            flags.insert(TrackFragmentHeaderFlags::DEFAULT_SAMPLE_SIZE_PRESENT);
+        }
+
+        if self.default_sample_flags.is_some() {
+            flags.insert(TrackFragmentHeaderFlags::DEFAULT_SAMPLE_FLAGS_PRESENT);
+        }
+
+        if self.duration_is_empty {
+            flags.insert(TrackFragmentHeaderFlags::DURATION_IS_EMPTY);
+        }
+
+        if self.default_base_is_moof {
+            flags.insert(TrackFragmentHeaderFlags::DEFAULT_BASE_IS_MOOF);
+        }
+
+        flags
+    }
+}
+
+impl Mp4Box for TrackFragmentHeaderBox {
+    const NAME: FourCC = FourCC(*b"tfhd");
+
+    fn get_full_box_header(&self) -> Option<FullBoxHeader> {
+        Some(FullBoxHeader::new(0, self.flags_from_fields().bits()))
+    }
+
+    fn content_size(&self) -> u64 {
+        let mut size = size_of::<u32>() as u64; // track_ID
+
+        if self.base_data_offset.is_some() {
+            size += size_of::<u64>() as u64;
+        }
+
+        if self.sample_description_index.is_some() {
+            size += size_of::<u32>() as u64;
+        }
+
+        if self.default_sample_duration.is_some() {
+            size += size_of::<u32>() as u64;
+        }
+
+        if self.default_sample_size.is_some() {
+            size += size_of::<u32>() as u64;
+        }
+
+        if self.default_sample_flags.is_some() {
+            size += size_of::<u32>() as u64;
+        }
+
+        size
+    }
+
+    fn write_box_contents(&self, writer: &mut BytesMut) -> Result<(), Mp4BoxError> {
+        let mut v = Vec::new();
+
+        v.write_u32::<BigEndian>(self.track_id)?;
+
+        if let Some(base_data_offset) = self.base_data_offset {
+            v.write_u64::<BigEndian>(base_data_offset)?;
+        }
+
+        if let Some(sample_description_index) = self.sample_description_index {
+            v.write_u32::<BigEndian>(sample_description_index)?;
+        }
+
+        if let Some(default_sample_duration) = self.default_sample_duration {
+            v.write_u32::<BigEndian>(default_sample_duration)?;
+        }
+
+        if let Some(default_sample_size) = self.default_sample_size {
+            v.write_u32::<BigEndian>(default_sample_size)?;
+        }
+
+        if let Some(default_sample_flags) = self.default_sample_flags {
+            v.write_u32::<BigEndian>(default_sample_flags)?;
+        }
+
+        writer.put_slice(&v);
+
+        Ok(())
+    }
+}
-- 
cgit v1.2.3-70-g09d2