[MPlayer-dev-eng] [PATCH] Fix incomplete loading of playlists of certain sizes

Reimar Döffinger Reimar.Doeffinger at gmx.de
Fri Jul 31 22:17:30 CEST 2015

On Fri, Jul 31, 2015 at 12:43:14AM +0200, Joel Klinghed wrote:
> stream_read() ends up calling stream_fill_buffer() as the stream
> buffer is empty. stream_fill_buffer() calls
> stream_read_internal(STREAM_BUFFER_SIZE=4096) which returns 2022 bytes
> read.
> stream_fill_buffer() then calls
> stream_read_internal(STREAM_BUFFER_MIN=2048) as the length returned by
> the first call to stream_read_internal returned less than
> STREAM_BUFFER_MIN. The second call to stream_read_internal sets
> stream->eof to true as there is no data left in the file.
> stream_fill_buffer() now returns as the last call
> to stream_read_internal() returned 0.

There's the bug.
EOF should only be triggered if a read external to the
stream layer triggered a buffer fill and we could not
read _any_ data to fill the buffer.
This was a case missed by a bugfix for something else (r37310).
Your patch may well fix the playlist parser but leaves
all other users of the stream layer affected still.
Something like below patch should hopefully fix it properly
(not sure if it's exactly the best way though):
-- a/stream/stream.c
+++ b/stream/stream.c
@@ -366,6 +366,9 @@ int stream_fill_buffer(stream_t *s){
     s->buf_len += len;
+  // since the first read succeeded we are
+  // definitely not at EOF yet
+  s->eof = 0;
 //  printf("[%d]",len);fflush(stdout);
   if (s->capture_file)

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