74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
package dvr
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import (
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"context"
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"fmt"
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"log"
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"net/http"
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"net/url"
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"sync"
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"time"
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"github.com/grafov/m3u8"
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)
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// playlistRefresher periodically fetches the playlist and enqueues new segments
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func PlaylistRefresher(ctx context.Context, playlistURL string, segmentsChan chan<- string, seen *sync.Map, interval time.Duration) {
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ticker := time.NewTicker(interval)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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close(segmentsChan)
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return
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case <-ticker.C:
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segments, err := fetchPlaylistSegments(playlistURL)
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if err != nil {
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log.Printf("Error fetching playlist: %v", err)
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continue
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}
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for _, seg := range segments {
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if _, exists := seen.LoadOrStore(seg, true); !exists {
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segmentsChan <- seg
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}
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}
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}
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}
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}
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// fetchPlaylistSegments is a placeholder that parses the M3U8 and returns full URLs
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func fetchPlaylistSegments(playlistURL string) ([]string, error) {
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resp, err := http.Get(playlistURL)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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playlist, listType, err := m3u8.DecodeFrom(resp.Body, true)
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if err != nil {
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return nil, err
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}
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if listType == m3u8.MASTER {
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return nil, fmt.Errorf("playlist is a master playlist")
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}
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media := playlist.(*m3u8.MediaPlaylist)
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base, err := url.Parse(playlistURL)
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if err != nil {
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return nil, err
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}
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var segments []string
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for _, segment := range media.Segments {
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if segment == nil {
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continue
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}
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rel, err := url.Parse(segment.URI)
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if err != nil {
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return nil, err
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}
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segments = append(segments, base.ResolveReference(rel).String())
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}
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return segments, nil
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}
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