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A long time ago in an mpd far away...
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MPD has supported more audio formats than just MP3
for over five years...
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We don't change the song pointer there, either.
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We don't modify the Song when we delete it
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It was a huge confusing mess of parameter passing around
and around. Add a few extra assertions to ensure we're
handling parent/child relationships properly.
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This is like basename(3) but with predictable semantics independent
of C library or build options used. This is also much more strict
and does not account for trailing slashes (mpd should never deal with
trailing slashes on internal functions).
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We no longer fork for directory updates, so we
no longer have children to reap.
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Small memory reduction compared to songvec since most users have
much fewer dirs than songs, but still nice to have.
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We no longer for for updates
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"free" implies the songvec structure itself is freed,
which is not the case.
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If we updated the mpd metadata database; then there's a chance
some of those songs in the playlist will have updated metadata.
So be on the safe side and increment the playlist version number
if _any_ song changed (this is how all released versions of mpd
did it, too).
This bug was introduced recently when making "update" threaded.
Thanks to stonecrest for the bug report.
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We forgot to update the playlist.queued marker if
playlist.current changed.
Additionally, if the queue cleared in any other mode,
attempt to requeue (as it's a harmless no-op otherwise).
Thanks to stonecrest for the bug report.
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If repeat is off, we reset (and reshuffle in random mode)
the playlist.
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Fix this regression introduced in the core rewrite so that we
now skip to the next song when we encounter an error with the
song we tried to decode.
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SongList has been superseded by struct songvec.
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With patch 8d2830b3, I broke "addid": it did not return the id of the
new song, because of a typo in the return condition (== instead of
!=).
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This reverts commit efefaee1f9535012be2fbfea8f0f870904daad5d.
Conflicts:
src/directory.c
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Potentially broken free() implementations don't like it
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Use freeList() instead of free() to free all elements in
the list.
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It's possible the playlist will be accessing a song that is to
be freed in the update thread. Rather than going through the
complexity (and potential to make mistakes) of locking the
playlist (as well as losing CPU cycles/pipelining due to
barriers with mutexes), we'll just line up all songs to
be freed in the main thread.
It's relatively uncommon to call freeSong() heavily (as it is to
update); so the extra, temporary memory usage won't be very
noticeable.
Additionally, if a song is renamed and it contains unique tag
item; this has the additional side effect of preventing
unnecessary fragmentation where an item is freed and shortly
reallocated.
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The umask calls were remants of when we used fopen().
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open(2) should only interrupt on "slow" devices, afaik...
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Any pruned files will be noticed during update and pruned
from the live database, so this inefficient function can
go away and never come back.
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A lot of the preparation was needed (and done in previous
months) in making update thread-safe, but here it is.
This was the first thing I made work inside a thread when I
started mpd-uclinux many years ago, and also the last thing I've
done in mainline mpd to work inside a thread, go figure.
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This way we avoid having to document -1, 0, 1
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Pruning is very expensive and we won't need it in the future
anyways. This brings startup back to previous speeds (before
songvec changes).
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pthreads with our existing signal blocking/handling is broken,
for now just sleep a bit in the child to prevent the CHLD handler
from being called too early. Also, improve error reporting when
handling SIGCHLD by storing the status to be called in the main
task (which can be logged, since we can't do logging inside the
sig handler).
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Our linked-list implementation is wasteful and the
SongList isn't modified enough to benefit from being a linked
list. So use a more compact array of song pointers which
saves ~200K on a library with ~9K songs (on x86-32).
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It hasn't been used in many years
commit 3a89afdd80f228139554372a83a9d74486acf691
Author: Warren Dukes <warren.dukes@gmail.com>
Date: Sat Nov 20 20:28:32 2004 +0000
remove --update-db option
(SVN r2719)
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LOC reduction and less noise makes things easier for
tired old folks to follow.
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This allows us to avoid the nasty repetition in strncmp(foo,
bar, strlen(foo)). We'll miss out on the compiler optimizing
strlen() into sizeof() - 1 for string literals for this; but we
don't use this it for performance-critical functions anyways...
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Respect the user's umask (and the number of the beast!)
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Noticed-by: Courtney Cavin
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I have serious trust issues when using stdio to write to the FS.
So it's best to clean this code out so I can start figuring out
what's wrong with Rasi's box not updating...
None of these writes take place in a performance-critical
setting anyways...
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This should save a few thousand ops. Not worth it to malloc
for such a small (3-words on 32-bit ARM and x86) structures.
Signed-off-by: Eric Wong <normalperson@yhbt.net>
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The function decodeFirstFrame() allocates memory based on data from
the mp3 header. This can make the buffer size allocation overflow, or
lead to a DoS attack with a very large buffer. Cap this buffer at 8
million frames, which should really be enough for reasonable files.
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The assertion on "!client_is_expired(client)" was wrong, because
writing the command response may cause the client to become expired.
Replace that assertion with a check.
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A crafted mp4 file could cause an integer overflow in mp4_decode
function in src/inputPlugins/mp4_plugin.c. mp4ff_num_samples()
function returns some tainted value. sizeof(float) * numSamples is an
integer overflow operation if numSamples is too huge, so xmalloc will
allocate a small memory region. I constructe a mp4 file, and use
faad2 to open the file. mp4ff_num_samples() returns -1. So I think mpd
bears from the same problem.
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Seeing the token "client" repeatedly in the same blocks of code
adds to mental fatigue and makes it harder to follow code
because there's fewer unique tokens to distinguish.
"cl" is unique within mpd and conveys enough information
to be useful to anybody reading the code.
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Remove one comparison by changing branch order.
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Since the caller chain doesn't care about the return value (except for
COMMAND_RETURN_KILL, COMMAND_RETURN_CLOSE), just return 0 if there is
nothing special. This saves one local variable initialization, and
one access to it.
Also remove one unreachable "return 1" from client_read().
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Don't close the client within client_process_line(), return
COMMAND_RETURN_CLOSE instead. This is the signal for the caller chain
to actually close it. This makes dealing with the client pointer a
lot safer, since the caller always knows whether it is still valid.
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It's easier to reuse the variable if it has a more generic name.
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Don't update client data if it is going to be closed anyway.
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