mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
synced 2024-05-02 16:39:00 +00:00
594 lines
22 KiB
Rust
594 lines
22 KiB
Rust
// Take a look at the license at the top of the repository in the LICENSE file.
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#![allow(clippy::upper_case_acronyms)]
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use std::{cell::RefCell, cmp, fmt, rc::Rc};
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use glib::{
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translate::{from_glib, ToGlibPtr},
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Date, SendValue, ToValue,
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};
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use serde::{
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de,
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de::{Deserialize, DeserializeSeed, Deserializer, SeqAccess, Visitor},
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ser,
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ser::{Serialize, SerializeSeq, SerializeStruct, SerializeTuple, Serializer},
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};
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use crate::{
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date_time_serde,
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tags::{GenericTagIter, TagList, TagListRef},
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value_serde::{DATE_OTHER_TYPE_ID, DATE_TIME_OTHER_TYPE_ID, SAMPLE_OTHER_TYPE_ID},
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DateTime, Sample, TagMergeMode, TagScope,
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};
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macro_rules! ser_tag (
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($value:ident, $seq:ident, $t:ty) => (
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ser_some_value!($value, $t, |_, value| {
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$seq.serialize_element(&value)
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})
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);
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);
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macro_rules! ser_opt_tag (
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($value:ident, $seq:ident, $t:ty) => (
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ser_opt_value!($value, $t, |_, value| {
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$seq.serialize_element(&value)
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})
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);
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);
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// Note: unlike `Value`s, `Tag`s with optional `Type` `String` & `Date` values are guarenteed
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// to be Non-null and non-empty in the C API. See:
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// https://gitlab.freedesktop.org/gstreamer/gstreamer/blob/d90d771a9a512381315f7694c3a50b152035f3cb/gst/gststructure.c#L810-853
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// serialize trait is only available for `&self`, but we need to mutate the iterator
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struct TagValuesSer<'a>(Rc<RefCell<GenericTagIter<'a>>>);
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impl<'a> TagValuesSer<'a> {
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fn from(tags_ser: &TagsSer<'a>) -> Self {
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skip_assert_initialized!();
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TagValuesSer(Rc::clone(&tags_ser.1))
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}
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}
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impl<'a> Serialize for TagValuesSer<'a> {
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fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
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use std::ops::DerefMut;
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let mut tag_iter = self.0.borrow_mut();
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let mut seq = serializer.serialize_seq(tag_iter.size_hint().1)?;
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for value in tag_iter.deref_mut() {
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match value.type_() {
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glib::Type::F64 => ser_tag!(value, seq, f64),
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glib::Type::STRING => {
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// See above comment about `Tag`s with `String` values
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ser_some_value!(value, String, |_, value: String| {
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seq.serialize_element(&value)
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})
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}
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glib::Type::U32 => ser_tag!(value, seq, u32),
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glib::Type::U64 => ser_tag!(value, seq, u64),
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type_id => {
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if *DATE_OTHER_TYPE_ID == type_id {
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// See above comment about `Tag`s with `Date` values
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ser_some_value!(value, Date, |_, value: Date| {
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// Need to wrap the `glib::Date` in new type `date_time_serde::Date` first
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// See comment in `date_time_serde.rs`
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seq.serialize_element(&date_time_serde::Date::from(value))
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})
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} else if *DATE_TIME_OTHER_TYPE_ID == type_id {
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ser_opt_tag!(value, seq, DateTime)
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} else if *SAMPLE_OTHER_TYPE_ID == type_id {
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ser_opt_tag!(value, seq, Sample)
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} else {
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Err(ser::Error::custom(format!(
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"unimplemented `Tag` serialization for type {type_id}",
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)))
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}
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}
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}?;
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}
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seq.end()
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}
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}
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struct TagsSer<'a>(&'a str, Rc<RefCell<GenericTagIter<'a>>>);
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impl<'a> TagsSer<'a> {
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fn new(name: &'a str, tag_iter: GenericTagIter<'a>) -> Self {
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skip_assert_initialized!();
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TagsSer(name, Rc::new(RefCell::new(tag_iter)))
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}
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}
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impl<'a> Serialize for TagsSer<'a> {
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fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
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let mut tup = serializer.serialize_tuple(2)?;
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tup.serialize_element(self.0)?;
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tup.serialize_element(&TagValuesSer::from(self))?;
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tup.end()
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}
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}
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struct TagListSer<'a>(&'a TagListRef);
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impl<'a> Serialize for TagListSer<'a> {
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fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
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let tag_count = self.0.n_tags();
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match tag_count.cmp(&0) {
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cmp::Ordering::Greater => {
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let mut seq = serializer.serialize_seq(Some(tag_count as usize))?;
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let tag_list_iter = self.0.iter_generic();
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for (tag_name, tag_iter) in tag_list_iter {
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seq.serialize_element(&TagsSer::new(tag_name, tag_iter))?;
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}
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seq.end()
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}
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cmp::Ordering::Equal => {
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let seq = serializer.serialize_seq(None)?;
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seq.end()
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}
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cmp::Ordering::Less => Err(ser::Error::custom("tag count < 0")),
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}
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}
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}
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impl Serialize for TagListRef {
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fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
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let mut tag_list = serializer.serialize_struct("TagList", 3)?;
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tag_list.serialize_field("scope", &self.scope())?;
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tag_list.serialize_field("tags", &TagListSer(self))?;
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tag_list.end()
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}
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}
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impl Serialize for TagList {
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fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
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self.as_ref().serialize(serializer)
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}
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}
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macro_rules! de_tag(
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($tag_name:expr, $seq:expr, $t:ty) => (
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de_some_send_value!("Tag", $tag_name, $seq, $t)
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);
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);
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macro_rules! de_opt_tag(
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($tag_name:expr, $seq:expr, $t:ty) => (
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de_opt_send_value!("Tag", $tag_name, $seq, $t)
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);
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);
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struct TagValues<'a>(&'a str, &'a mut TagListRef);
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struct TagValuesVisitor<'a>(&'a str, &'a mut TagListRef);
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impl<'de, 'a> Visitor<'de> for TagValuesVisitor<'a> {
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type Value = ();
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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formatter.write_str("a sequence of `Tag` values with the same type")
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}
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fn visit_seq<A: SeqAccess<'de>>(self, mut seq: A) -> Result<(), A::Error> {
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let tag_type: glib::Type = unsafe {
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let tag_name = self.0.to_glib_none();
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from_glib(ffi::gst_tag_get_type(tag_name.0))
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};
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loop {
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let tag_value = match tag_type {
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glib::Type::F64 => de_tag!(self.0, seq, f64),
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glib::Type::STRING => {
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// See comment above `TagValuesSer` definition about `Tag`s with `String` values
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de_tag!(self.0, seq, String)
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}
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glib::Type::U32 => de_tag!(self.0, seq, u32),
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glib::Type::U64 => de_tag!(self.0, seq, u64),
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type_id => {
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if *DATE_OTHER_TYPE_ID == type_id {
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// See comment above `TagValuesSer` definition about `Tag`s with `Date` values
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// Need to deserialize as `date_time_serde::Date` new type
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// See comment in `date_time_serde.rs`
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de_send_value!("Tag", self.0, seq, date_time_serde::Date, Date)
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} else if *DATE_TIME_OTHER_TYPE_ID == type_id {
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de_opt_tag!(self.0, seq, DateTime)
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} else if *SAMPLE_OTHER_TYPE_ID == type_id {
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de_opt_tag!(self.0, seq, Sample)
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} else {
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return Err(de::Error::custom(format!(
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"unimplemented deserialization for `Tag` {} with type `{}`",
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self.0, type_id,
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)));
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}
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}
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}?;
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match tag_value {
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Some(tag_value) => self
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.1
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.add_value(self.0, &tag_value, TagMergeMode::Append)
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.map_err(|_| {
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de::Error::custom(format!("wrong value type for `Tag` {}", self.0))
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})?,
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None => break,
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}
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}
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Ok(())
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}
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}
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impl<'de, 'a> DeserializeSeed<'de> for TagValues<'a> {
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type Value = ();
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fn deserialize<D: Deserializer<'de>>(self, deserializer: D) -> Result<(), D::Error> {
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skip_assert_initialized!();
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deserializer.deserialize_seq(TagValuesVisitor(self.0, self.1))
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}
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}
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struct TagValuesTuple<'a>(&'a mut TagListRef);
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struct TagValuesTupleVisitor<'a>(&'a mut TagListRef);
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impl<'de, 'a> Visitor<'de> for TagValuesTupleVisitor<'a> {
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type Value = ();
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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formatter
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.write_str("a tuple (`Tag` name: `String`, seq. of `Tag` values with the same type)")
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}
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fn visit_seq<A: SeqAccess<'de>>(self, mut seq: A) -> Result<(), A::Error> {
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let name = seq
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.next_element::<String>()
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.map_err(|err| de::Error::custom(format!("Error reading Tag name. {err:?}")))?
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.ok_or_else(|| de::Error::custom("Expected a name for the `Tag` name"))?;
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seq.next_element_seed(TagValues(name.as_str(), self.0))?
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.ok_or_else(|| de::Error::custom("Expected a seq of values for the `Tag`"))
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}
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}
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impl<'de, 'a> DeserializeSeed<'de> for TagValuesTuple<'a> {
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type Value = ();
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fn deserialize<D: Deserializer<'de>>(self, deserializer: D) -> Result<(), D::Error> {
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skip_assert_initialized!();
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deserializer.deserialize_tuple(2, TagValuesTupleVisitor(self.0))
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}
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}
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struct TagsDe(TagList);
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struct TagsVisitor;
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impl<'de> Visitor<'de> for TagsVisitor {
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type Value = TagsDe;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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formatter.write_str("a sequence of `Tag`s")
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}
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fn visit_seq<A: SeqAccess<'de>>(self, mut seq: A) -> Result<Self::Value, A::Error> {
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let mut tag_list = TagList::new();
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{
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let tag_list = tag_list.get_mut().unwrap();
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while seq.next_element_seed(TagValuesTuple(tag_list))?.is_some() {
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// tags are added in the dedicated deserializers
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}
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}
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Ok(TagsDe(tag_list))
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}
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}
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impl<'de> Deserialize<'de> for TagsDe {
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fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
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skip_assert_initialized!();
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deserializer.deserialize_seq(TagsVisitor)
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}
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}
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#[derive(serde::Deserialize)]
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struct TagListDe {
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scope: TagScope,
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tags: TagsDe,
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}
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impl From<TagListDe> for TagList {
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fn from(tag_list_de: TagListDe) -> Self {
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skip_assert_initialized!();
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let mut tag_list = tag_list_de.tags.0;
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tag_list.get_mut().unwrap().set_scope(tag_list_de.scope);
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tag_list
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}
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}
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impl<'de> Deserialize<'de> for TagList {
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fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
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skip_assert_initialized!();
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TagListDe::deserialize(deserializer).map(|tag_list_de| tag_list_de.into())
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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 crate::{tags::*, Buffer, ClockTime, Sample, TagMergeMode, TagScope};
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#[test]
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fn test_serialize() {
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crate::init().unwrap();
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let mut tags = TagList::new();
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assert_eq!(tags.to_string(), "taglist;");
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{
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let tags = tags.get_mut().unwrap();
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tags.add::<Title>(&"a title", TagMergeMode::Append); // String
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tags.add::<Title>(&"another title", TagMergeMode::Append); // String
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tags.add::<Duration>(&(ClockTime::SECOND * 120), TagMergeMode::Append); // u64
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tags.add::<Bitrate>(&96_000, TagMergeMode::Append); // u32
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tags.add::<TrackGain>(&1f64, TagMergeMode::Append); // f64
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tags.add::<Date>(
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&glib::Date::from_dmy(28, glib::DateMonth::May, 2018).unwrap(),
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TagMergeMode::Append,
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);
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tags.add::<DateTime>(
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&crate::DateTime::from_ymd(2018, 5, 28).unwrap(),
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TagMergeMode::Append,
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);
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let sample = {
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let mut buffer = Buffer::from_slice(vec![1, 2, 3, 4]);
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{
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let buffer = buffer.get_mut().unwrap();
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buffer.set_offset(0);
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buffer.set_offset_end(0);
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}
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Sample::builder().buffer(&buffer).build()
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};
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tags.add::<Image>(&sample, TagMergeMode::Append); // Sample
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}
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let pretty_config = ron::ser::PrettyConfig::new().new_line("".to_string());
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let res = ron::ser::to_string_pretty(&tags, pretty_config);
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assert_eq!(
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Ok(concat!(
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r#"("#,
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r#" scope: Stream,"#,
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r#" tags: ["#,
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r#" ("title", ["#,
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r#" "a title","#,
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r#" "another title","#,
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r#" ]),"#,
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r#" ("duration", ["#,
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r#" 120000000000,"#,
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r#" ]),"#,
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r#" ("bitrate", ["#,
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r#" 96000,"#,
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r#" ]),"#,
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r#" ("replaygain-track-gain", ["#,
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r#" 1.0,"#,
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r#" ]),"#,
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r#" ("date", ["#,
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r#" YMD(2018, 5, 28),"#,
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r#" ]),"#,
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r#" ("datetime", ["#,
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r#" Some(YMD(2018, 5, 28)),"#,
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r#" ]),"#,
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r#" ("image", ["#,
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r#" Some(("#,
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r#" buffer: Some(("#,
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r#" pts: None,"#,
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r#" dts: None,"#,
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r#" duration: None,"#,
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r#" offset: 0,"#,
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r#" offset_end: 0,"#,
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r#" flags: "","#,
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r#" buffer: "AQIDBA==","#,
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r#" )),"#,
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r#" buffer_list: None,"#,
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r#" caps: None,"#,
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r#" segment: Some(("#,
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r#" flags: "","#,
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r#" rate: 1.0,"#,
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r#" applied_rate: 1.0,"#,
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r#" format: Time,"#,
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r#" base: 0,"#,
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r#" offset: 0,"#,
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r#" start: 0,"#,
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r#" stop: -1,"#,
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r#" time: 0,"#,
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r#" position: 0,"#,
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r#" duration: -1,"#,
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r#" )),"#,
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r#" info: None,"#,
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r#" )),"#,
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r#" ]),"#,
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r#" ],"#,
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r#")"#,
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)
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.to_owned()),
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res,
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);
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}
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#[test]
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fn test_deserialize() {
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crate::init().unwrap();
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let tag_list_ron = r#"
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(
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scope: Global,
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tags: [
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("title", [
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"a title",
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"another title",
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]),
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("duration", [120000000000]),
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("bitrate", [96000]),
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("replaygain-track-gain", [1.0]),
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("date", [
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YMD(2018, 5, 28),
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]),
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("datetime", [
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Some(YMD(2018, 5, 28)),
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]),
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("image", [
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Some((
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buffer: Some((
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pts: None,
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dts: None,
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duration: None,
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offset: 0,
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offset_end: 0,
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flags: "",
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buffer: "AQIDBA==",
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)),
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buffer_list: None,
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caps: None,
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segment: None,
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info: None,
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)),
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])
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],
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)
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"#;
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let tags: TagList = ron::de::from_str(tag_list_ron).unwrap();
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assert_eq!(tags.scope(), TagScope::Global);
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assert_eq!(tags.index::<Title>(0).unwrap().get(), "a title");
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assert_eq!(tags.index::<Title>(1).unwrap().get(), "another title");
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assert_eq!(tags.index::<Title>(1).unwrap().get(), "another title");
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assert_eq!(
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tags.index::<Duration>(0).unwrap().get(),
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120 * ClockTime::SECOND,
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);
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assert_eq!(tags.index::<Bitrate>(0).unwrap().get(), 96_000);
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assert!((tags.index::<TrackGain>(0).unwrap().get() - 1f64).abs() < std::f64::EPSILON);
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assert_eq!(
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tags.index::<Date>(0).unwrap().get(),
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glib::Date::from_dmy(28, glib::DateMonth::May, 2018).unwrap()
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);
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assert_eq!(
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tags.index::<DateTime>(0).unwrap().get(),
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crate::DateTime::from_ymd(2018, 5, 28).unwrap()
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);
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let sample = tags.index::<Image>(0).unwrap().get();
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let buffer = sample.buffer().unwrap();
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{
|
|
let data = buffer.map_readable().unwrap();
|
|
assert_eq!(data.as_slice(), vec![1, 2, 3, 4].as_slice());
|
|
}
|
|
|
|
let tag_json = r#"
|
|
{
|
|
"scope":"Global",
|
|
"tags":[
|
|
["title", ["a title", "another title"]],
|
|
["duration", [120000000000]],
|
|
["bitrate", [96000]],
|
|
["replaygain-track-gain", [1]],
|
|
["date",[{"YMD":[2018,5,28]}]],
|
|
["datetime",[{"YMD":[2018,5,28]}]],
|
|
["image",[{"buffer":{"pts":null,"dts":null,"duration":null,"offset":0,"offset_end":0,"flags":"","buffer":[1,2,3,4]},"buffer_list":null,"caps":null,"segment":null,"info":null}]]
|
|
]
|
|
}
|
|
"#;
|
|
let tags: TagList = serde_json::from_str(tag_json).unwrap();
|
|
assert_eq!(tags.scope(), TagScope::Global);
|
|
|
|
assert_eq!(tags.index::<Title>(0).unwrap().get(), "a title");
|
|
assert_eq!(tags.index::<Title>(1).unwrap().get(), "another title");
|
|
assert_eq!(tags.index::<Bitrate>(0).unwrap().get(), 96_000);
|
|
assert!((tags.index::<TrackGain>(0).unwrap().get() - 1f64).abs() < std::f64::EPSILON);
|
|
assert_eq!(
|
|
tags.index::<Date>(0).unwrap().get(),
|
|
glib::Date::from_dmy(28, glib::DateMonth::May, 2018).unwrap()
|
|
);
|
|
assert_eq!(
|
|
tags.index::<DateTime>(0).unwrap().get(),
|
|
crate::DateTime::from_ymd(2018, 5, 28).unwrap()
|
|
);
|
|
let sample = tags.index::<Image>(0).unwrap().get();
|
|
let buffer = sample.buffer().unwrap();
|
|
{
|
|
let data = buffer.map_readable().unwrap();
|
|
assert_eq!(data.as_slice(), vec![1, 2, 3, 4].as_slice());
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_serde_roundtrip() {
|
|
crate::init().unwrap();
|
|
|
|
let mut tags = TagList::new();
|
|
assert_eq!(tags.to_string(), "taglist;");
|
|
{
|
|
let tags = tags.get_mut().unwrap();
|
|
tags.set_scope(TagScope::Global);
|
|
tags.add::<Title>(&"a title", TagMergeMode::Append); // String
|
|
tags.add::<Title>(&"another title", TagMergeMode::Append); // String
|
|
tags.add::<Duration>(&(ClockTime::SECOND * 120), TagMergeMode::Append); // u64
|
|
tags.add::<Bitrate>(&96_000, TagMergeMode::Append); // u32
|
|
tags.add::<TrackGain>(&1f64, TagMergeMode::Append); // f64
|
|
tags.add::<Date>(
|
|
&glib::Date::from_dmy(28, glib::DateMonth::May, 2018).unwrap(),
|
|
TagMergeMode::Append,
|
|
);
|
|
tags.add::<DateTime>(
|
|
&crate::DateTime::from_ymd(2018, 5, 28).unwrap(),
|
|
TagMergeMode::Append,
|
|
);
|
|
|
|
let sample = {
|
|
let mut buffer = Buffer::from_slice(vec![1, 2, 3, 4]);
|
|
{
|
|
let buffer = buffer.get_mut().unwrap();
|
|
buffer.set_offset(0);
|
|
buffer.set_offset_end(0);
|
|
}
|
|
Sample::builder().buffer(&buffer).build()
|
|
};
|
|
tags.add::<Image>(&sample, TagMergeMode::Append); // Sample
|
|
}
|
|
let tags_ser = ron::ser::to_string(&tags).unwrap();
|
|
|
|
let tags_de: TagList = ron::de::from_str(tags_ser.as_str()).unwrap();
|
|
assert_eq!(tags_de.scope(), TagScope::Global);
|
|
|
|
assert_eq!(
|
|
tags_de.index::<Title>(0).unwrap().get(),
|
|
tags.index::<Title>(0).unwrap().get(),
|
|
);
|
|
assert_eq!(
|
|
tags_de.index::<Title>(1).unwrap().get(),
|
|
tags.index::<Title>(1).unwrap().get(),
|
|
);
|
|
assert_eq!(
|
|
tags_de.index::<Duration>(0).unwrap().get(),
|
|
tags.index::<Duration>(0).unwrap().get(),
|
|
);
|
|
assert_eq!(
|
|
tags_de.index::<Bitrate>(0).unwrap().get(),
|
|
tags.index::<Bitrate>(0).unwrap().get(),
|
|
);
|
|
assert!(
|
|
(tags_de.index::<TrackGain>(0).unwrap().get()
|
|
- tags.index::<TrackGain>(0).unwrap().get())
|
|
.abs()
|
|
< std::f64::EPSILON
|
|
);
|
|
assert_eq!(
|
|
tags_de.index::<Date>(0).unwrap().get(),
|
|
tags.index::<Date>(0).unwrap().get(),
|
|
);
|
|
assert_eq!(
|
|
tags.index::<DateTime>(0).unwrap().get(),
|
|
crate::DateTime::from_ymd(2018, 5, 28).unwrap()
|
|
);
|
|
let sample = tags.index::<Image>(0).unwrap().get();
|
|
let buffer = sample.buffer().unwrap();
|
|
{
|
|
let data = buffer.map_readable().unwrap();
|
|
assert_eq!(data.as_slice(), vec![1, 2, 3, 4].as_slice());
|
|
}
|
|
}
|
|
}
|