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use super::*;
const PRT_REPORT_BLOCK_MIN_LENGTH: u16 = 8;
/// PacketReceiptTimesReportBlock represents a Packet Receipt Times
/// report block, as described in RFC 3611 section 4.3.
///
/// 0 1 2 3
/// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | BT=3 | rsvd. | t | block length |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | ssrc of source |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | begin_seq | end_seq |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | Receipt time of packet begin_seq |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | Receipt time of packet (begin_seq + 1) mod 65536 |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// : ... :
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | Receipt time of packet (end_seq - 1) mod 65536 |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#[derive(Debug, Default, PartialEq, Eq, Clone)]
pub struct PacketReceiptTimesReportBlock {
//not included in marshal/unmarshal
pub t: u8,
//marshal/unmarshal
pub ssrc: u32,
pub begin_seq: u16,
pub end_seq: u16,
pub receipt_time: Vec<u32>,
}
impl fmt::Display for PacketReceiptTimesReportBlock {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{self:?}")
}
}
impl PacketReceiptTimesReportBlock {
pub fn xr_header(&self) -> XRHeader {
XRHeader {
block_type: BlockType::PacketReceiptTimes,
type_specific: self.t & 0x0F,
block_length: (self.raw_size() / 4 - 1) as u16,
}
}
}
impl Packet for PacketReceiptTimesReportBlock {
fn header(&self) -> Header {
Header::default()
}
/// destination_ssrc returns an array of ssrc values that this report block refers to.
fn destination_ssrc(&self) -> Vec<u32> {
vec![self.ssrc]
}
fn raw_size(&self) -> usize {
XR_HEADER_LENGTH + PRT_REPORT_BLOCK_MIN_LENGTH as usize + self.receipt_time.len() * 4
}
fn as_any(&self) -> &(dyn Any + Send + Sync) {
self
}
fn equal(&self, other: &(dyn Packet + Send + Sync)) -> bool {
other
.as_any()
.downcast_ref::<PacketReceiptTimesReportBlock>()
.map_or(false, |a| self == a)
}
fn cloned(&self) -> Box<dyn Packet + Send + Sync> {
Box::new(self.clone())
}
}
impl MarshalSize for PacketReceiptTimesReportBlock {
fn marshal_size(&self) -> usize {
self.raw_size()
}
}
impl Marshal for PacketReceiptTimesReportBlock {
/// marshal_to encodes the PacketReceiptTimesReportBlock in binary
fn marshal_to(&self, mut buf: &mut [u8]) -> Result<usize> {
if buf.remaining_mut() < self.marshal_size() {
return Err(error::Error::BufferTooShort.into());
}
let h = self.xr_header();
let n = h.marshal_to(buf)?;
buf = &mut buf[n..];
buf.put_u32(self.ssrc);
buf.put_u16(self.begin_seq);
buf.put_u16(self.end_seq);
for rt in &self.receipt_time {
buf.put_u32(*rt);
}
Ok(self.marshal_size())
}
}
impl Unmarshal for PacketReceiptTimesReportBlock {
/// Unmarshal decodes the PacketReceiptTimesReportBlock from binary
fn unmarshal<B>(raw_packet: &mut B) -> Result<Self>
where
Self: Sized,
B: Buf,
{
if raw_packet.remaining() < XR_HEADER_LENGTH {
return Err(error::Error::PacketTooShort.into());
}
let xr_header = XRHeader::unmarshal(raw_packet)?;
let block_length = xr_header.block_length * 4;
if block_length < PRT_REPORT_BLOCK_MIN_LENGTH
|| (block_length - PRT_REPORT_BLOCK_MIN_LENGTH) % 4 != 0
|| raw_packet.remaining() < block_length as usize
{
return Err(error::Error::PacketTooShort.into());
}
let t = xr_header.type_specific & 0x0F;
let ssrc = raw_packet.get_u32();
let begin_seq = raw_packet.get_u16();
let end_seq = raw_packet.get_u16();
let remaining = block_length - PRT_REPORT_BLOCK_MIN_LENGTH;
let mut receipt_time = vec![];
for _ in 0..remaining / 4 {
receipt_time.push(raw_packet.get_u32());
}
Ok(PacketReceiptTimesReportBlock {
t,
ssrc,
begin_seq,
end_seq,
receipt_time,
})
}
}