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Implement detailed writing of HVCC configuration data in Hvc1Box, including various profile and constraint parameters.

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damitha 2025-03-26 18:26:32 +11:00
parent caf699fce8
commit 485d9c9a96
1 changed files with 29 additions and 1 deletions
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30
src/mp4box/hvc1.rs
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@ -171,7 +171,35 @@ impl<W: Write> WriteBox<&mut W> for Hvc1Box {
writer.write_u16::<BigEndian>(self.depth)?;
writer.write_i16::<BigEndian>(-1)?; // pre-defined
self.hvcc.write_box(writer)?;
// Write the hvcc configuration data without its header
writer.write_u8(self.hvcc.configuration_version)?;
let general_profile_space = (self.hvcc.general_profile_space & 0b11) << 6;
let general_tier_flag = u8::from(self.hvcc.general_tier_flag) << 5;
let general_profile_idc = self.hvcc.general_profile_idc & 0b11111;
writer.write_u8(general_profile_space | general_tier_flag | general_profile_idc)?;
writer.write_u32::<BigEndian>(self.hvcc.general_profile_compatibility_flags)?;
writer.write_u48::<BigEndian>(self.hvcc.general_constraint_indicator_flag)?;
writer.write_u8(self.hvcc.general_level_idc)?;
writer.write_u16::<BigEndian>(self.hvcc.min_spatial_segmentation_idc & 0x0FFF)?;
writer.write_u8(self.hvcc.parallelism_type & 0b11)?;
writer.write_u8(self.hvcc.chroma_format_idc & 0b11)?;
writer.write_u8(self.hvcc.bit_depth_luma_minus8 & 0b111)?;
writer.write_u8(self.hvcc.bit_depth_chroma_minus8 & 0b111)?;
writer.write_u16::<BigEndian>(self.hvcc.avg_frame_rate)?;
let constant_frame_rate = (self.hvcc.constant_frame_rate & 0b11) << 6;
let num_temporal_layers = (self.hvcc.num_temporal_layers & 0b111) << 3;
let temporal_id_nested = u8::from(self.hvcc.temporal_id_nested) << 2;
let length_size_minus_one = self.hvcc.length_size_minus_one & 0b11;
writer.write_u8(constant_frame_rate | num_temporal_layers | temporal_id_nested | length_size_minus_one)?;
writer.write_u8(self.hvcc.arrays.len() as u8)?;
for arr in &self.hvcc.arrays {
writer.write_u8((arr.nal_unit_type & 0b111111) | u8::from(arr.completeness) << 7)?;
writer.write_u16::<BigEndian>(arr.nalus.len() as _)?;
for nalu in &arr.nalus {
writer.write_u16::<BigEndian>(nalu.size)?;
writer.write_all(&nalu.data)?;
}
}
Ok(size)
}