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use serde::de::{Deserialize, Deserializer, SeqAccess, Visitor};
use serde::ser::{Serialize, SerializeSeq, Serializer};
use std::fmt;
use crate::Buffer;
use crate::BufferList;
use crate::BufferListRef;
impl Serialize for BufferListRef {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
let iter = self.iter();
let (remaining, _) = iter.size_hint();
if remaining > 0 {
let mut seq = serializer.serialize_seq(Some(remaining))?;
for buffer in iter {
seq.serialize_element(buffer)?;
}
seq.end()
} else {
let seq = serializer.serialize_seq(None)?;
seq.end()
}
}
}
impl Serialize for BufferList {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
self.as_ref().serialize(serializer)
}
}
struct BufferListVisitor;
impl<'de> Visitor<'de> for BufferListVisitor {
type Value = BufferList;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("a sequence of Buffers")
}
fn visit_seq<A: SeqAccess<'de>>(self, mut seq: A) -> Result<Self::Value, A::Error> {
let mut buffer_list = BufferList::new();
{
let buffer_list = buffer_list.get_mut().unwrap();
while let Some(buffer) = seq.next_element::<Buffer>()? {
buffer_list.add(buffer);
}
}
Ok(buffer_list)
}
}
impl<'de> Deserialize<'de> for BufferList {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
skip_assert_initialized!();
deserializer.deserialize_seq(BufferListVisitor)
}
}
#[cfg(test)]
mod tests {
use crate::BufferList;
use crate::ClockTime;
#[test]
fn test_serialize() {
use crate::Buffer;
crate::init().unwrap();
let mut buffer_list = BufferList::new();
{
let buffer_list = buffer_list.get_mut().unwrap();
let mut buffer = Buffer::from_slice(vec![1, 2, 3, 4]);
{
let buffer = buffer.get_mut().unwrap();
buffer.set_pts(ClockTime::NSECOND);
buffer.set_offset(0);
buffer.set_offset_end(4);
buffer.set_duration(4 * ClockTime::NSECOND);
}
buffer_list.add(buffer);
let mut buffer = Buffer::from_slice(vec![5, 6]);
{
let buffer = buffer.get_mut().unwrap();
buffer.set_pts(5 * ClockTime::NSECOND);
buffer.set_offset(4);
buffer.set_offset_end(6);
buffer.set_duration(2 * ClockTime::NSECOND);
}
buffer_list.add(buffer);
}
let pretty_config = ron::ser::PrettyConfig::new().with_new_line("".to_string());
let res = ron::ser::to_string_pretty(&buffer_list, pretty_config);
assert_eq!(
Ok(concat!(
"[",
" (",
" pts: Some(1),",
" dts: None,",
" duration: Some(4),",
" offset: 0,",
" offset_end: 4,",
" flags: (",
" bits: 0,",
" ),",
" buffer: \"AQIDBA==\",",
" ),",
" (",
" pts: Some(5),",
" dts: None,",
" duration: Some(2),",
" offset: 4,",
" offset_end: 6,",
" flags: (",
" bits: 0,",
" ),",
" buffer: \"BQY=\",",
" ),",
"]"
)
.to_owned()),
res,
);
}
#[test]
fn test_deserialize() {
crate::init().unwrap();
let buffer_list_ron = r#"
[
(
pts: Some(1),
dts: None,
duration: Some(4),
offset: 0,
offset_end: 4,
flags: (
bits: 0,
),
buffer: "AQIDBA==",
),
(
pts: Some(5),
dts: None,
duration: Some(2),
offset: 4,
offset_end: 6,
flags: (
bits: 0,
),
buffer: "BQY=",
),
]
"#;
let buffer_list: BufferList = ron::de::from_str(buffer_list_ron).unwrap();
let mut iter = buffer_list.iter();
let buffer = iter.next().unwrap();
assert_eq!(buffer.pts(), Some(ClockTime::NSECOND));
assert_eq!(buffer.dts(), None);
{
let data = buffer.map_readable().unwrap();
assert_eq!(data.as_slice(), vec![1, 2, 3, 4].as_slice());
}
let buffer = iter.next().unwrap();
assert_eq!(buffer.pts(), Some(5 * ClockTime::NSECOND));
{
let data = buffer.map_readable().unwrap();
assert_eq!(data.as_slice(), vec![5, 6].as_slice());
}
}
#[test]
fn test_serde_roundtrip() {
use crate::Buffer;
crate::init().unwrap();
let mut buffer_list = BufferList::new();
{
let buffer_list = buffer_list.get_mut().unwrap();
let mut buffer = Buffer::from_slice(vec![1, 2, 3, 4]);
{
let buffer = buffer.get_mut().unwrap();
buffer.set_pts(ClockTime::NSECOND);
buffer.set_offset(0);
buffer.set_offset_end(4);
buffer.set_duration(4 * ClockTime::NSECOND);
}
buffer_list.add(buffer);
let mut buffer = Buffer::from_slice(vec![5, 6]);
{
let buffer = buffer.get_mut().unwrap();
buffer.set_pts(5 * ClockTime::NSECOND);
buffer.set_offset(4);
buffer.set_offset_end(6);
buffer.set_duration(2 * ClockTime::NSECOND);
}
buffer_list.add(buffer);
}
let buffer_list_ser = ron::ser::to_string(&buffer_list).unwrap();
let buffer_list: BufferList = ron::de::from_str(buffer_list_ser.as_str()).unwrap();
let mut iter = buffer_list.iter();
let buffer = iter.next().unwrap();
assert_eq!(buffer.pts(), Some(ClockTime::NSECOND));
assert_eq!(buffer.dts(), None);
{
let data = buffer.map_readable().unwrap();
assert_eq!(data.as_slice(), vec![1, 2, 3, 4].as_slice());
}
let buffer = iter.next().unwrap();
assert_eq!(buffer.pts(), Some(5 * ClockTime::NSECOND));
{
let data = buffer.map_readable().unwrap();
assert_eq!(data.as_slice(), vec![5, 6].as_slice());
}
}
}