player/Thread: never reuse decoder when switching radio streams

When switching to another song manually, the player checks if the decoder is already decoding that song; if so, it will attempt to reuse it by seeking it to the new position. That however fails if the decoder is not seekable (e.g. a radio stream) which leaves the user unable to switch to that song with the bogus error message "Not seekable".

player/Thread: never reuse decoder when switching radio streams
44b20024 · Max Kellermann · a2340c31 · 44b20024 · 44b20024 · 44b20024
Commit 44b20024 authored Apr 25, 2018 by Max Kellermann
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Showing with 10 additions and 3 deletions

NEWS NEWS +2 -0

DecoderControl.hxx src/decoder/DecoderControl.hxx +7 -2

Thread.cxx src/player/Thread.cxx +1 -1

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--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,8 @@ ver 0.20.19 (not yet released)
  - validate absolute seek time, reject negative values
 * input
  - mms: fix lockup bug and a crash bug
+* player
+  - fix spurious "Not seekable" error when switching radio streams
 * macOS: fix crash bug

 ver 0.20.18 (2018/02/24)

--- a/src/decoder/DecoderControl.hxx
+++ b/src/decoder/DecoderControl.hxx
@@ -308,9 +308,14 @@ struct DecoderControl {
 	bool IsCurrentSong(const DetachedSong &_song) const noexcept;

 	gcc_pure
-	bool LockIsCurrentSong(const DetachedSong &_song) const noexcept {
+	bool IsSeekableCurrentSong(const DetachedSong &_song) const noexcept {
+		return seekable && IsCurrentSong(_song);
+	}
+
+	gcc_pure
+	bool LockIsSeeakbleCurrentSong(const DetachedSong &_song) const noexcept {
 		const std::lock_guard<Mutex> protect(mutex);
-		return IsCurrentSong(_song);
+		return IsSeekableCurrentSong(_song);
 	}

 private:

--- a/src/player/Thread.cxx
+++ b/src/player/Thread.cxx
@@ -584,7 +584,7 @@ Player::SeekDecoder()

 	const SongTime start_time = pc.next_song->GetStartTime();

-	if (!dc.LockIsCurrentSong(*pc.next_song)) {
+	if (!dc.LockIsSeeakbleCurrentSong(*pc.next_song)) {
 		/* the decoder is already decoding the "next" song -
 		   stop it and start the previous song again */