decoder/plugins/FfmpegIo: return AVERROR_EOF at end of file

This part of the AVIOContext API is not documented :-( Closes https://github.com/MusicPlayerDaemon/MPD/issues/1448

decoder/plugins/FfmpegIo: return AVERROR_EOF at end of file
8f84e1be · Max Kellermann · 9975905f · 8f84e1be · 8f84e1be
Commit 8f84e1be authored Mar 14, 2022 by Max Kellermann
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NEWS NEWS +1 -0

FfmpegIo.cxx src/decoder/plugins/FfmpegIo.cxx +5 -1

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--- a/NEWS
+++ b/NEWS
 ver 0.23.6 (not yet released)
 * decoder
+  - ffmpeg: fix end-of-file check (update stuck at empty files)
  - opus: fix "readpicture" on Opus files
 * output
  - pipewire: fix crash bug if setting volume before playback starts

--- a/src/decoder/plugins/FfmpegIo.cxx
+++ b/src/decoder/plugins/FfmpegIo.cxx
@@ -35,7 +35,11 @@ AvioStream::~AvioStream()
 inline int
 AvioStream::Read(void *dest, int size)
 {
-	return decoder_read(client, input, dest, size);
+	const auto nbytes = decoder_read(client, input, dest, size);
+	if (nbytes == 0)
+		return AVERROR_EOF;
+
+	return nbytes;
 }

 inline int64_t