Support for low-latency media playlist (#33)

* feat: support #EXT-X-PART-INF:PART-TARGET tag

* feat: skip expired partial segments

* feat: support #EXT-X-SKIP tag

Author: Wkkkkk

.github/workflows/coverage.yml

@@ -19,4 +19,4 @@ jobs:
       - run: go test -v -coverprofile=profile.cov ./...
       - uses: shogo82148/actions-goveralls@v1
         with:
-          path-to-profile: profile.cov
+          path-to-profile: profile.cov

CHANGELOG.md

@@ -9,6 +9,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- EncodeWithSkip() to media playlist
+- EXT-X-PART support
+- EXT-X-PART-INF support
+- EXT-X-SERVER-CONTROL support
+- EXT-X-PRELOAD-HINT support
+- EXT-X-SKIP support
 - EXT-X-GAP support
 - EXT-X-SESSION-KEY support
 - EXT-X-CONTENT-STEERING support

README.md

@@ -32,7 +32,8 @@ There is a function `Decode`, that decodes and autodetects the type of playlist,
 both in parallel, and stopping one, once the type is known.
 
 For generating playlists, one starts by calling either `NewMasterPlaylist` or `NewMediaPlaylist`.
-One can then `Set` or `Append` extra data.
+One can then `Set` or `Append` extra data. For example, one can `Append` a full media segment or
+`AppendPartial` a partial segment to Low-Latency HLS media playlists.
 
 For live media playlists with a fixed sliding window, one
 can set a `winsize` and it will be used to always output
@@ -41,6 +42,7 @@ the latest segments.
 For VOD or EVENT media playlists, the `winsize` should be 0.
 
 For writing, there are `Encode` methods that return a `*bytes.Buffer`. This buffer serves as a cache.
+It is also possible to call `EncodeWithSkip` to skip the first `n` segments.
 
 ## Installation / Usage
 

m3u8/read_write_test.go

@@ -399,6 +399,8 @@ func TestReadWritePlaylists(t *testing.T) {
 		"media-playlist-with-start-time.m3u8",
 		"master-with-independent-segments.m3u8",
 		"media-playlist-with-gap.m3u8",
+		"media-playlist-low-latency.m3u8",
+		"media-playlist-with-skip.m3u8",
 	}
 
 	for _, fileName := range files {