mirror of
https://github.com/bluenviron/mediamtx
synced 2025-02-13 18:08:11 +00:00
e5ab731d14
* hls source: support fMP4s video streams * hls source: start reading live streams from (end of playlist - starting point) * hls client: wait processing of current fMP4 segment before downloading another one * hls client: support fmp4 trun boxes with default sample duration, flags and size * hls client: merge fmp4 init file reader and writer * hls client: merge fmp4 part reader and writer * hls client: improve precision of go <-> mp4 time conversion * hls client: fix esds generation in go-mp4 * hls client: support audio in separate playlist * hls client: support an arbitrary number of tracks in fmp4 init files * hls client: support EXT-X-BYTERANGE * hls client: support fmp4 segments with multiple parts at once * hls client: support an arbitrary number of mpeg-ts tracks * hls client: synchronize tracks around a primary track * update go-mp4 * hls: synchronize track reproduction around a leading one * hls client: reset stream if playback is too late * hls client: add limit on DTS-RTC difference * hls client: support again streams that don't provide codecs in master playlist
107 lines
2.3 KiB
Go
107 lines
2.3 KiB
Go
// Package m3u8 contains a M3U8 parser.
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package m3u8
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import (
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"bytes"
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"errors"
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"regexp"
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"strings"
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gm3u8 "github.com/grafov/m3u8"
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)
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var reKeyValue = regexp.MustCompile(`([a-zA-Z0-9_-]+)=("[^"]+"|[^",]+)`)
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func decodeParamsLine(line string) map[string]string {
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out := make(map[string]string)
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for _, kv := range reKeyValue.FindAllStringSubmatch(line, -1) {
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k, v := kv[1], kv[2]
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out[k] = strings.Trim(v, ` "`)
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}
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return out
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}
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// MasterPlaylist is a master playlist.
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type MasterPlaylist struct {
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gm3u8.MasterPlaylist
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Alternatives []*gm3u8.Alternative
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}
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func (MasterPlaylist) isPlaylist() {}
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func newMasterPlaylist(byts []byte, mpl *gm3u8.MasterPlaylist) (*MasterPlaylist, error) {
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var alternatives []*gm3u8.Alternative
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// https://github.com/grafov/m3u8/blob/036100c52a87e26c62be56df85450e9c703201a6/reader.go#L301
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for _, line := range strings.Split(string(byts), "\n") {
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if strings.HasPrefix(line, "#EXT-X-MEDIA:") {
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var alt gm3u8.Alternative
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for k, v := range decodeParamsLine(line[13:]) {
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switch k {
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case "TYPE":
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alt.Type = v
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case "GROUP-ID":
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alt.GroupId = v
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case "LANGUAGE":
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alt.Language = v
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case "NAME":
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alt.Name = v
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case "DEFAULT":
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switch {
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case strings.ToUpper(v) == "YES":
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alt.Default = true
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case strings.ToUpper(v) == "NO":
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alt.Default = false
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default:
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return nil, errors.New("value must be YES or NO")
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}
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case "AUTOSELECT":
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alt.Autoselect = v
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case "FORCED":
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alt.Forced = v
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case "CHARACTERISTICS":
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alt.Characteristics = v
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case "SUBTITLES":
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alt.Subtitles = v
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case "URI":
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alt.URI = v
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}
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}
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alternatives = append(alternatives, &alt)
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}
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}
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return &MasterPlaylist{
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MasterPlaylist: *mpl,
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Alternatives: alternatives,
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}, nil
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}
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// MediaPlaylist is a media playlist.
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type MediaPlaylist gm3u8.MediaPlaylist
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func (MediaPlaylist) isPlaylist() {}
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// Playlist is a M3U8 playlist.
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type Playlist interface {
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isPlaylist()
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}
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// Unmarshal decodes a M3U8 Playlist.
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func Unmarshal(byts []byte) (Playlist, error) {
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pl, _, err := gm3u8.Decode(*(bytes.NewBuffer(byts)), true)
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if err != nil {
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return nil, err
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}
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switch tpl := pl.(type) {
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case *gm3u8.MasterPlaylist:
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return newMasterPlaylist(byts, tpl)
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case *gm3u8.MediaPlaylist:
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return (*MediaPlaylist)(tpl), nil
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}
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panic("unexpected playlist type")
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}
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