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* | tag: oops, of course items is now ** and not *Eric Wong2008-09-051-2/+2
| | | | | | | | | | | | Gah, it seems like doing sizeof here either way is error prone. Too easy to leave out a '*' character we can forget.
* | audio_format: volatile removalEric Wong2008-09-051-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | volatile provides absolutely no guarantee thread-safety in SMP environments. volatile was designed to access memory locations in peripheral hardware directly; not for SMP. If volatile is needed to work properly on SMP, then it is only hiding subtle bugs. volatile only prevents the /compiler/ from making optimizations when accessing variables. CPUs do their own optimizations at runtime so it cannot guarantee registers of CPUs are flushed to memory cache-coherent access on different CPUs. Furthermore, the thread-communication via condition variables between threads sharing audio formats already results in memory barriers.
* | tag: lock all accesses to tag_poolEric Wong2008-09-053-6/+15
| | | | | | | | | | | | | | | | | | | | The tag pool is a shared global resource that is infrequently modified. However, it can occasionally be modified by several threads, especially by the metadata_pipe for streaming metadata (both reading/writing). The bulk tag_item pool is NOT locked as currently only the update thread uses it.
* | tag: introduce handy items_size() functionEric Wong2008-09-051-11/+12
| | | | | | | | | | | | | | | | | | | | | | Trying to read or remember "tag->numOfItems * sizeof(*tag->items)" requires too much thinking and mental effort on my part. Also, favor "sizeof(struct mpd_tag)" over "sizeof(*tag->items)" because the former is easier to read and follow, even though the latter is easier to modify if the items member changes to a different type.
* | Merge branch 'mk/tag'Eric Wong2008-09-0344-1468/+998
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * mk/tag: (22 commits) tag: fix segfault on update utf8.h: Fix build (broken os_compat.h #include) tag: optimize tag_dup(), copy item references tag: fix the shout and oggflac plugins const pointers tag: static directory name tag: try not to reallocate tag.items in every add() call song: don't export newNullSong() tag: try not to duplicate the input string tag: pass length to fix_utf8() added "length" parameter to validUtf8String() assert value!=NULL in fix_utf8() tag: converted macro fixUtf8() to an inline function tag: added a pool for tag items tag: converted tag_item.value to a char array removed tree.c tag: converted MpdTag.items to a pointer list tag: moved code to tag_id3.c wavpack: tag_new() cannot fail tag: converted tag_add_item() to an inline function ...
| * | tag: fix segfault on updateEric Wong2008-09-032-14/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | clearMpdTag could be called on a tag that was still in a tag_begin_add transaction before tag_end_add is called. This was causing free() to attempt to operate on bulk.items; which is un-free()-able. Now instead we unmark the bulk.busy to avoid committing the tags to the heap only to be immediately freed. Additionally, we need to remember to call tag_end_add() when a song is updated before we NULL song->tag to avoid tripping an assertion the next time tag_begin_add() is called.
| * | utf8.h: Fix build (broken os_compat.h #include)Eric Wong2008-09-021-1/+1
| | | | | | | | | | | | This is not a system header
| * | tag: optimize tag_dup(), copy item referencesMax Kellermann2008-09-023-7/+42
| | | | | | | | | | | | | | | Don't call tag_pool_get_item() for duplicating tags, just increase the item's reference counter instead.
| * | tag: fix the shout and oggflac pluginsMax Kellermann2008-09-022-6/+8
| | | | | | | | | | | | | | | | | | During the tag library refactoring, the shout plugin was disabled, and I forgot about adapting it to the new API. Apply the same fixes to the oggflac decoder plugin.
| * | const pointersMax Kellermann2008-09-024-10/+10
| | | | | | | | | | | | Yet another patch which converts pointer arguments to "const".
| * | tag: static directory nameMax Kellermann2008-09-021-5/+3
| | | | | | | | | | | | | | | | | | While parsing the tag cache, don't allocate the directory name from the heap, but copy it into a buffer on the stack. This reduces heap fragmentation by 1%.
| * | tag: try not to reallocate tag.items in every add() callMax Kellermann2008-09-023-7/+91
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If many tag_items are added at once while the tag cache is being loaded, manage these items in a static fixed list, instead of reallocating the list with every newly created item. This reduces heap fragmentation. Massif results again: mk before: total 12,837,632; useful 10,626,383; extra 2,211,249 mk now: total 12,736,720; useful 10,626,383; extra 2,110,337 The "useful" value is the same since this patch only changes the way we allocate the same amount of memory, but heap fragmentation was reduced by 5%.
| * | song: don't export newNullSong()Max Kellermann2008-09-022-3/+1
| | | | | | | | | | | | The function newNullSong() is only used internally in song.c.
| * | tag: try not to duplicate the input stringMax Kellermann2008-09-021-13/+18
| | | | | | | | | | | | | | | | | | Try to detect if the string needs Latin1-UTF8 conversion, or whitespace cleanup. If not, we don't need to allocate temporary memory, leading to decreased heap fragmentation.
| * | tag: pass length to fix_utf8()Max Kellermann2008-09-021-3/+4
| | | | | | | | | | | | Same as the previous patch, prepare the function fix_utf8() this time.
| * | added "length" parameter to validUtf8String()Max Kellermann2008-09-024-10/+16
| | | | | | | | | | | | | | | | | | | | | At several places, we create temporary copies of non-null-terminated strings, just to use them in functions like validUtf8String(). We can save this temporary allocation and avoid heap fragmentation if we add a length parameter instead of expecting a null-terminated string.
| * | assert value!=NULL in fix_utf8()Max Kellermann2008-09-021-1/+3
| | | | | | | | | | | | | | | We must never pass value==NULL to fix_utf(). Replace the run-time check with an assertion.
| * | tag: converted macro fixUtf8() to an inline functionMax Kellermann2008-09-021-9/+11
| | | | | | | | | | | | | | | | | | | | | Since the inline function cannot modify its caller's variables (which is a good thing for code readability), the new string pointer is the return value. The resulting binary should be the same as with the macro.
| * | tag: added a pool for tag itemsMax Kellermann2008-09-025-6/+147
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new source tag_pool.c manages a pool of reference counted tag_item objects. This is used to merge tag items of the same type and value, saving lots of memory. Formerly, only the value itself was pooled, wasting memory for all the pointers and tag_item structs. The following results were measured with massif. Started MPD on amd64, typed "mpc", no song being played. My music database contains 35k tagged songs. The results are what massif reports as "peak". 0.13.2: total 14,131,392; useful 11,408,972; extra 2,722,420 eric: total 18,370,696; useful 15,648,182; extra 2,722,514 mk f34f694: total 15,833,952; useful 13,111,470; extra 2,722,482 mk now: total 12,837,632; useful 10,626,383; extra 2,211,249 This patch set saves 20% memory, and does a good job in reducing heap fragmentation.
| * | tag: converted tag_item.value to a char arrayMax Kellermann2008-09-024-20/+5
| | | | | | | | | | | | | | | | | | | | | The value is stored in the same memory allocation as the tag_item struct; this saves memory because we do not store the value pointer anymore. Also remove the getTagItemString()/removeTagItemString() dummies.
| * | removed tree.cMax Kellermann2008-09-024-857/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes MPD consume much more memory because string pooling is disabled, but it prepares the next bunch of patches. Replace the code in tagTracker.c with naive algorithms without the tree code. For now, this should do; later we should find better algorithms, especially for getNumberOfTagItems(), which has become wasteful with temporary memory.
| * | tag: converted MpdTag.items to a pointer listMax Kellermann2008-09-024-17/+20
| | | | | | | | | | | | | | | | | | This prepares the following patches, which aim to reduce MPD's memory usage: we plan to share tag_item instances, instead of just their values.
| * | tag: moved code to tag_id3.cMax Kellermann2008-09-025-352/+402
| | | | | | | | | | | | | | | The ID3 code uses only the public tag API, but is otherwise unrelated. Move it to a separate source file.
| * | wavpack: tag_new() cannot failMax Kellermann2008-09-021-5/+0
| | | | | | | | | | | | | | | Since tag_new() uses xmalloc(), it cannot fail - if we're really out of memory, the process will abort.
| * | tag: converted tag_add_item() to an inline functionMax Kellermann2008-09-021-2/+5
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| * | tag: renamed functions, no CamelCaseMax Kellermann2008-09-0219-121/+120
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| * | tag: renamed MpdTag and MpdTagItem to struct mpd_tag, struct tag_itemMax Kellermann2008-09-0226-109/+112
| | | | | | | | | | | | | | | Getting rid of CamelCase; not having typedefs also allows us to forward-declare the structures.
* | | ob_send: avoid void pointer arithmetic warningEric Wong2008-09-021-1/+1
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* | | volume: include outputBuffer.h for ob_set_sw_volumeEric Wong2008-09-021-0/+1
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* | | Add missing function prototypesEric Wong2008-09-024-4/+7
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* | Merge branch 'ew/deconst'Eric Wong2008-09-016-55/+26
|\ \ | | | | | | | | | | | | | | | * ew/deconst: use deconst_ptr instead of duplicating deconst logic provide a generic deconst_ptr function
| * | use deconst_ptr instead of duplicating deconst logicEric Wong2008-09-015-55/+15
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| * | provide a generic deconst_ptr functionEric Wong2008-09-011-0/+11
| |/ | | | | | | | | | | | | | | | | This is generic enough to be used for various purposes. It will only deconst their argument to work around various braindead APIs without having to write a new wrapper each time we use one of those braindead APIs. It does not cast nor do do anything other than quietly remove the const qualifier for those braindead APIs.
* / playlist: fix shuffle/random distributionEric Wong2008-09-011-6/+19
|/ | | | | | | | | | Previously we were using a naive randomization algorithm that could shuffle already shuffled songs. Now we attempt to correctly[1] implement the Fisher-Yates shuffle. [1] Note: I absolutely suck at basic arithmetic, so there could be off-by-one errors in here, too. I've added assertions in swapSongs and swapOrder functions to more quickly detect them.
* storedPlaylist: correctly expand path when writingEric Wong2008-09-011-6/+7
| | | | | Otherwise we'd be writing to whatever directory that mpd is running in.
* Merge branch 'mk/cleanups'Eric Wong2008-09-0163-776/+993
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * mk/cleanups: (60 commits) pass constant pointers const pointers unsigned integers and size_t oggflac: fix GCC warnings include cleanup protect locate.h from double inclusion playlist: eliminate unused fd parameters jack: made "sample_size" static const moved jack configuration to the JackData struct jack: removed unused macros jack: don't set audioOutput->data=NULL jack: initialize JackData in jack_initDriver() jack: added freeJackClient() jack: initialize jd->client after !jd check jack: eliminate superfluous freeJackData() calls mp3: converted the MUTEFRAME_ macros to an enum mp3: converted the DECODE_ constants to an enum wavpack: don't use "isp" before initialization wavpack: moved code to wavpack_open_wvc() simplified code in the ogg decoder plugin ...
| * pass constant pointersMax Kellermann2008-08-3110-16/+17
| | | | | | | | And again, convert arguments to const.
| * const pointersMax Kellermann2008-08-316-16/+16
| | | | | | | | The usual bunch of pointer arguments which should be const.
| * unsigned integers and size_tMax Kellermann2008-08-313-11/+11
| | | | | | | | | | Use "unsigned int" whenever negative values are not meaningful. Use size_t whenever we are going to describe buffer sizes.
| * oggflac: fix GCC warningsMax Kellermann2008-08-311-9/+9
| | | | | | | | | | | | Fix lots of "unused parameter" warnings in the OggFLAC decoder plugin. Not sure if anybody uses it anymore, since newer libflac obsoletes it.
| * include cleanupMax Kellermann2008-08-314-2/+3
| | | | | | | | Only include headers which are really needed.
| * protect locate.h from double inclusionMax Kellermann2008-08-311-0/+5
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| * playlist: eliminate unused fd parametersMax Kellermann2008-08-313-34/+34
| | | | | | | | | | Again, remove file descriptor parameters, which are not actually used. These functions can also be converted to return void.
| * jack: made "sample_size" static constMax Kellermann2008-08-311-1/+1
| | | | | | | | | | sample_size is a variable which is computed at compile time. Declare it "static const", so the compiler can optimize it away.
| * moved jack configuration to the JackData structMax Kellermann2008-08-311-49/+64
| | | | | | | | | | | | Storing local configuration in global (static) variables is obviously a bad idea. Move all those variables into the JackData struct, including the locks.
| * jack: removed unused macrosMax Kellermann2008-08-311-10/+0
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| * jack: don't set audioOutput->data=NULLMax Kellermann2008-08-311-5/+5
| | | | | | | | | | | | | | There is only one caller of freeJackData() left: jack_finishDriver(). This function is called by the mpd core, and is called exactly once for every successful jack_initDriver(). We do not need to clear audioOutput->data, since this variable is invalidated anyway.
| * jack: initialize JackData in jack_initDriver()Max Kellermann2008-08-311-6/+2
| | | | | | | | | | | | | | | | Over the lifetime of the jack AudioOutput object, we want a single valid JackData object, so we can persistently store data there (configuration etc.). Allocate JackData in jack_initDriver(). After that, we can safely remove all audioOutput->data==NULL checks (and replace them with assertions).
| * jack: added freeJackClient()Max Kellermann2008-08-311-13/+25
| | | | | | | | | | | | | | No need to destroy the JackData object when an error occurs, since jack_finishDriver() already frees it. Only deinitialize the jack library, introduce freeJackClient() for that, and move code from freeJackData().
| * jack: initialize jd->client after !jd checkMax Kellermann2008-08-311-5/+5
| | | | | | | | | | | | Prepare the next patch: make the "!jd" check independent of the jd->client initialization. This way we can change the "jd" initialization semantics later.
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