This patch redoes the filesystem code from the FAT driver up to the
clipboard code in onplay.c.
Not every aspect of this is finished therefore it is still "WIP". I
don't wish to do too much at once (haha!). What is left to do is get
dircache back in the sim and find an implementation for the dircache
indicies in the tagcache and playlist code or do something else that
has the same benefit. Leaving these out for now does not make anything
unusable. All the basics are done.
Phone app code should probably get vetted (and app path handling
just plain rewritten as environment expansions); the SDL app and
Android run well.
Main things addressed:
1) Thread safety: There is none right now in the trunk code. Most of
what currently works is luck when multiple threads are involved or
multiple descriptors to the same file are open.
2) POSIX compliance: Many of the functions behave nothing like their
counterparts on a host system. This leads to inconsistent code or very
different behavior from native to hosted. One huge offender was
rename(). Going point by point would fill a book.
3) Actual running RAM usage: Many targets will use less RAM and less
stack space (some more RAM because I upped the number of cache buffers
for large memory). There's very little memory lying fallow in rarely-used
areas (see 'Key core changes' below). Also, all targets may open the same
number of directory streams whereas before those with less than 8MB RAM
were limited to 8, not 12 implying those targets will save slightly
less.
4) Performance: The test_disk plugin shows markedly improved performance,
particularly in the area of (uncached) directory scanning, due partly to
more optimal directory reading and to a better sector cache algorithm.
Uncached times tend to be better while there is a bit of a slowdown in
dircache due to it being a bit heavier of an implementation. It's not
noticeable by a human as far as I can say.
Key core changes:
1) Files and directories share core code and data structures.
2) The filesystem code knows which descriptors refer to same file.
This ensures that changes from one stream are appropriately reflected
in every open descriptor for that file (fileobj_mgr.c).
3) File and directory cache buffers are borrowed from the main sector
cache. This means that when they are not in use by a file, they are not
wasted, but used for the cache. Most of the time, only a few of them
are needed. It also means that adding more file and directory handles
is less expensive. All one must do in ensure a large enough cache to
borrow from.
4) Relative path components are supported and the namespace is unified.
It does not support full relative paths to an implied current directory;
what is does support is use of "." and "..". Adding the former would
not be very difficult. The namespace is unified in the sense that
volumes may be specified several times along with relative parts, e.g.:
"/<0>/foo/../../<1>/bar" :<=> "/<1>/bar".
5) Stack usage is down due to sharing of data, static allocation and
less duplication of strings on the stack. This requires more
serialization than I would like but since the number of threads is
limited to a low number, the tradoff in favor of the stack seems
reasonable.
6) Separates and heirarchicalizes (sic) the SIM and APP filesystem
code. SIM path and volume handling is just like the target. Some
aspects of the APP file code get more straightforward (e.g. no path
hashing is needed).
Dircache:
Deserves its own section. Dircache is new but pays homage to the old.
The old one was not compatible and so it, since it got redone, does
all the stuff it always should have done such as:
1) It may be update and used at any time during the build process.
No longer has one to wait for it to finish building to do basic file
management (create, remove, rename, etc.).
2) It does not need to be either fully scanned or completely disabled;
it can be incomplete (i.e. overfilled, missing paths), still be
of benefit and be correct.
3) Handles mounting and dismounting of individual volumes which means
a full rebuild is not needed just because you pop a new SD card in the
slot. Now, because it reuses its freed entry data, may rebuild only
that volume.
4) Much more fundamental to the file code. When it is built, it is
the keeper of the master file list whether enabled or not ("disabled"
is just a state of the cache). Its must always to ready to be started
and bind all streams opened prior to being enabled.
5) Maintains any short filenames in OEM format which means that it does
not need to be rebuilt when changing the default codepage.
Miscellaneous Compatibility:
1) Update any other code that would otherwise not work such as the
hotswap mounting code in various card drivers.
2) File management: Clipboard needed updating because of the behavioral
changes. Still needs a little more work on some finer points.
3) Remove now-obsolete functionality such as the mutex's "no preempt"
flag (which was only for the prior FAT driver).
4) struct dirinfo uses time_t rather than raw FAT directory entry
time fields. I plan to follow up on genericizing everything there
(i.e. no FAT attributes).
5) unicode.c needed some redoing so that the file code does not try
try to load codepages during a scan, which is actually a problem with
the current code. The default codepage, if any is required, is now
kept in RAM separarately (bufalloced) from codepages specified to
iso_decode() (which must not be bufalloced because the conversion
may be done by playback threads).
Brings with it some additional reusable core code:
1) Revised file functions: Reusable code that does things such as
safe path concatenation and parsing without buffer limitations or
data duplication. Variants that copy or alter the input path may be
based off these.
To do:
1) Put dircache functionality back in the sim. Treating it internally
as a different kind of file system seems the best approach at this
time.
2) Restore use of dircache indexes in the playlist and database or
something effectively the same. Since the cache doesn't have to be
complete in order to be used, not getting a hit on the cache doesn't
unambiguously say if the path exists or not.
Change-Id: Ia30f3082a136253e3a0eae0784e3091d138915c8
Reviewed-on: http://gerrit.rockbox.org/566
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested: Michael Sevakis <jethead71@rockbox.org>
add_event_ex is added that takes an extra user_data pointer. This pointer is
passed to the callback (add_event and add_event_ex have slightly different
callbacks types). All callbacks also get the event id passed. Events added
with add_event_ex must be removed with remove_event_ex because the user_data
pointer must match in addition to the callback pointer.
On the other add_event is simplified to omit the oneshort parameter which
was almost always false (still there with add_event_ex).
As a side effect the ata_idle_notify callbacks are changed as well, they
do not take a data parameter anymore which was always NULL anyway.
This commit also adds some documentation to events.h
Change-Id: I13e29a0f88ef908f175b376d83550f9e0231f772
This complements offset-based resume and playback start funcionality.
The implementation is global on both HWCODEC and SWCODEC.
Basically, if either the specified elapsed or offset are non-zero,
it indicates a mid-track resume.
To resume by time only, set elapsed to nonzero and offset to zero.
To resume by offset only, set offset to nonzero and elapsed to zero.
Which one the codec uses and which has priority is up to the codec;
however, using an elapsed time covers more cases:
* Codecs not able to use an offset such as VGM or other atomic
formats
* Starting playback at a nonzero elapsed time from a source that
contains no offset, such as a cuesheet
The change re-versions pretty much everything from tagcache to nvram.
Change-Id: Ic7aebb24e99a03ae99585c5e236eba960d163f38
Reviewed-on: http://gerrit.rockbox.org/516
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested: Michael Sevakis <jethead71@rockbox.org>
readlink() might return the full size of the target buffer
and we write a '\0' to the returned length offset.
cppecheck reported:
[rockbox/apps/tagcache.c:4335]: (warning, inconclusive) readlink() might return the full size of 'target'. Lower the supplied size by one.
(the check was actually written by me)
Change-Id: Ibb42f732aa42c38bb6cb92cdccd3e6a0d3aa9b9f
It was also broken functionally, probably since a while.So restore the
functionality. Run it on the dap, the tcd files will be placed into .rockbox folder.
Change-Id: Id7a6ce4389dfaf99799258902be80d630af0601c
Support multiple roots (i.e. scan folders) using the new folder_select()
function.
Amaximum of 12 dirs can be selected, however the setting (i.e. the entire
folder list) cannot be longer than 80 chars.
The setting works similar to the autoresume dirs: Directories are seperated
by colons, e.g. "/Music:/Podcasts". Default is "/sdcard" on android, "/" on
all other targets.
Changes are made to the multiple-root logic in tagcache.c. This is to
a) provide the logic at all on native targets and b) support more than
one root before the scan even starts (until now it was used to add roots
during scan due to symlinks).
Change-Id: I64992c0678324536e8e64cd4427c8abbd8e8b39e
When a global pointer is not declared as constant, gcc will put it in
memory. Getting the address of the string it points to requires loading
the address of the pointer and then loading the pointer. When the pointer
is declared constant, the address of the string is loaded directly.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31345 a1c6a512-1295-4272-9138-f99709370657
Now all threads need to ack the connection like on real target, dircache is unloaded and playback stops accordingly.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31009 a1c6a512-1295-4272-9138-f99709370657
Also add two dircache function, one of which does what dircache_disable()
did previously as this now also frees the dircache buffer.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30393 a1c6a512-1295-4272-9138-f99709370657
This enables the ability to allocate (and free) memory dynamically
without fragmentation, through compaction. This means allocations can move
and fragmentation be reduced. Most changes are preparing Rockbox for this,
which many times means adding a move callback which can temporarily disable
movement when the corresponding code is in a critical section.
For now, the audio buffer allocation has a central role, because it's the one
having allocated most. This buffer is able to shrink itself, for which it
needs to stop playback for a very short moment. For this,
audio_buffer_available() returns the size of the audio buffer which can
possibly be used by other allocations because the audio buffer can shrink.
lastfm scrobbling and timestretch can now be toggled at runtime without
requiring a reboot.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30381 a1c6a512-1295-4272-9138-f99709370657
The buflib memory allocator is handle based and can free and
compact, move or resize memory on demand. This allows to effeciently
allocate memory dynamically without an MMU, by avoiding fragmentation
through memory compaction.
This patch adds the buflib library to the core, along with
convinience wrappers to omit the context parameter. Compaction is
not yet enabled, but will be in a later patch. Therefore, this acts as a
replacement for buffer_alloc/buffer_get_buffer() with the benifit of a debug
menu.
See buflib.h for some API documentation.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30380 a1c6a512-1295-4272-9138-f99709370657
Namely, introduce buffer_get_buffer() and buffer_release_buffer().
buffer_get_buffer() aquires all available and grabs a lock, attempting to
call buffer_alloc() or buffer_get_buffer() while this lock is locked will cause
a panicf() (doesn't actually happen, but is for debugging purpose).
buffer_release_buffer() unlocks that lock and can additionally increment the
audiobuf buffer to make an allocation. Pass 0 to only unlock if buffer was
used temporarily only.
buffer_available() is a replacement function to query audiobuflen, i.e. what's
left in the buffer.
Buffer init is moved up in the init chain and handles ipodvideo64mb internally.
Further changes happened to mp3data.c and talk.c as to not call the above API
functions, but get the buffer from callers. The caller is the audio system
which has the buffer lock while mp3data.c and talk mess with the buffer.
mpeg.c now implements some buffer related functions of playback.h, especially
audio_get_buffer(), allowing to reduce #ifdef hell a tiny bit.
audiobuf and audiobufend are local to buffer.c now.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30308 a1c6a512-1295-4272-9138-f99709370657
is set on a database entry and the dircache went offline. In this
case, retrieve() and get_next() need to abort and take the ramcache
offline as well.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30255 a1c6a512-1295-4272-9138-f99709370657
Check free space before reading new data from disk, and do not forget
to account for the RAM-cache header.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30246 a1c6a512-1295-4272-9138-f99709370657
files with names differing only in capitalization. Thanks to Slasheri
for the fix.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30241 a1c6a512-1295-4272-9138-f99709370657
in formats and conditions. The basename is the non-directory part of
a file's pathname.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30230 a1c6a512-1295-4272-9138-f99709370657
Only integer IDs are exposed from dircache with this. This way the cache is isolated from other modules.
This is needed for my buflib gsoc project.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30038 a1c6a512-1295-4272-9138-f99709370657
characters in a tag could cause the parser fail to import a track
statistics correctly. Now line feeds are escaped properly and carriage
returns ignored on import.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30021 a1c6a512-1295-4272-9138-f99709370657
memory. One of these headers (current_tcmh) was not loaded in when
tagcache state was initialized from a hibernated state file (flashed
H1xx targets). That caused internal serial number to start always from
zero, rendering "recently played tracks" query not working as expected.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30016 a1c6a512-1295-4272-9138-f99709370657
* There's no need to reset the buffer argument to
check_against_clauses to 0 when it's not needed. We can always
initialize str = buf and only change it on a RAM search hit.
* Do not memset buffer to 0 -- it's sufficient to make sure the
retrieved tag string is zero-terminated.
* Factor out a call to check_virtual_tags from two branches of an if
statement.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29981 a1c6a512-1295-4272-9138-f99709370657
used for nonnumeric tags as well.
Optimization for the nonnumeric case: Only numerics are ever updated,
so there's no need to scan the command queue for updates to nonnumeric
tags.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29979 a1c6a512-1295-4272-9138-f99709370657
all three of album, artist, and title tags to match for resurrection
to take place.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29858 a1c6a512-1295-4272-9138-f99709370657
Logical-AND ("&") always takes precedence over logical-OR.
(Parentheses are not supported.)
Fight binsize increase by storing some common expressions in local
variables. This avoids repeated reevaluations involving memory
accesses.
check_clauses: Fail clause (return false) in case of errors (tag too
long, DB entry deleted).
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29851 a1c6a512-1295-4272-9138-f99709370657
Correct an omission that happened when the DB schema was changed last
time. Add a comment to enum tag_type to prevent this from happening
in the future.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29435 a1c6a512-1295-4272-9138-f99709370657
At least on android it blindly writes to the end of the buffer passed to it assuming it's sufficiently. It wasn't in our case, resulting in a buffer overflow (and breakage).
This should fix strange problems relating to database initialization on application targets.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29147 a1c6a512-1295-4272-9138-f99709370657
Fix for FS#11856: In tagtree_buffer_event, do not wait for database to
come online as that may never happen. Rather, wait until it either
has come online or has decided that this will never happen. Added a
new function to tagcache.c to export this information.
Flyspray: FS#11865
Author: Michael Hohmuth
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29081 a1c6a512-1295-4272-9138-f99709370657
First, it add the ability to tagcache to walk through multiple search roots.
Second, it adds symlinks targets to the search roots if they're are not inside any of the current search roots, otherwise the symlink is ignored (unless it's a file).
The default search root is still /, so no search root will be actually added.
But the tagcache now isn't trapped by recursive symlinks anymore and successfully builds, and it's prepared for a future music directory setting.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28884 a1c6a512-1295-4272-9138-f99709370657
