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* 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.
* 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.
| * jack: eliminate superfluous freeJackData() callsMax Kellermann2008-08-311-6/+0
| | | | | | | | | | | | | | connect_jack() invokes freeJackData() in every error handler, although its caller also invokes this function after a failure. We can save a lot of lines in connect_jack() by removing these redundant freeJackData() invocations.
| * mp3: converted the MUTEFRAME_ macros to an enumMax Kellermann2008-08-311-9/+12
| | | | | | | | Also introduce MUTEFRAME_NONE; previously, the code used "0".
| * mp3: converted the DECODE_ constants to an enumMax Kellermann2008-08-311-8/+13
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| * wavpack: don't use "isp" before initializationMax Kellermann2008-08-311-4/+1
| | | | | | | | | | | | The old code called can_seek() with the uninitialized pointer "isp.is". Has this ever worked? Anyway, initialize "isp" first, then call can_seek(&isp).
| * wavpack: moved code to wavpack_open_wvc()Max Kellermann2008-08-311-70/+66
| | | | | | | | | | | | Move everything related to finding and initializing the WVC stream to wavpack_open_wvc(). This greatly simplifies its error handling and the function wavpack_streamdecode().
| * simplified code in the ogg decoder pluginMax Kellermann2008-08-301-25/+25
| | | | | | | | | | Return early when the player thread sent us a command. This saves one level of indentation.
| * oggvorbis: don't detect OGG header if stream is not seekableMax Kellermann2008-08-302-0/+10
| | | | | | | | | | | | | | | | | | If the input stream is not seekable, the try_decode() function consumes valuable data, which is not available to the decode() function anymore. This means that the decode() function does not parse the header correctly. Better skip the detection if we cannot seek. Or implement better buffering, something like unread() or buffered rewind().
| * mp3: audio_linear_dither() returns mpd_sint16Max Kellermann2008-08-301-11/+9
| | | | | | | | | | | | The return value of audio_linear_dither() is always casted to mpd_sint16. Returning long does not make sense, and consumed 8 bytes on a 64 bit platform.
| * mp3: changed outputBuffer's type to mpd_sint16[]Max Kellermann2008-08-301-4/+3
| | | | | | | | | | The output buffer always contains mpd_sint16; declaring it with that type saves several casts.
| * mp3: moved num_samples calculation out of the loopMax Kellermann2008-08-301-6/+7
| | | | | | | | | | The previous patch removed all loop specific dependencies from the num_samples formula; we can now calculate it before entering the loop.
| * mp3: eliminated outputPtrMax Kellermann2008-08-301-17/+9
| | | | | | | | | | | | The output buffer is always flushed after being appended to, which allows us to assume it is always empty. Always start writing at outputBuffer, don't remember outputPtr.
| * mp3: don't do a second flush in mp3_decode()Max Kellermann2008-08-301-12/+1
| | | | | | | | | | | | The previous patch made mp3Read() flush the output buffer in every iteration, which means we can eliminate the flush check after invoking mp3Read().
| * mp3: always flush directly after decoding/ditheringMax Kellermann2008-08-301-17/+13
| | | | | | | | | | Since we try to fill the buffer in every iteration, we assume that we should flush the output buffer at the end of each iteration.
| * mp3: dither a whole block at a timeMax Kellermann2008-08-301-3/+9
| | | | | | | | | | | | Fill the whole output buffer at a time by using dither_buffer()'s ability to decode blocks. Calculate how many samples fit into the output buffer before each invocation.
| * mp3: moved dropSamplesAtEnd check out of the loopMax Kellermann2008-08-301-21/+19
| | | | | | | | | | | | | | Simplifying loops for performance: why check dropSamplesAtEnd in every iteration, when we could modify the loop boundary? The (writable) variable samplesLeft can be eliminated; add a write-once variable pcm_length instead, which is used for the loop condition.
| * mp3: make samplesPerFrame more localMax Kellermann2008-08-301-2/+1
| | | | | | | | | | | | The variable samplesPerFrame is used only in one single closure. Make it local to this closure. The compiler will probably convert it to a register anyway.
| * mp3: unsigned integersMax Kellermann2008-08-301-11/+11
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| * mp3: moved code to dither_buffer()Max Kellermann2008-08-301-14/+30
| | | | | | | | | | | | | | | | Preparing for simplifying and thus speeding up the dithering code: moved dithering to a separate function which contains a trivial loop. With this patch, only one sample is dithered at a time, but the following patches will allow us to dither a whole block at a time, without complicated buffer length checks.
| * mp3: don't check dropSamplesAtStart in the loopMax Kellermann2008-08-301-7/+14
| | | | | | | | | | Performance improvement by moving stuff out of a loop: skip part of the first frame before entering the loop.
| * assert song->url != NULLMax Kellermann2008-08-301-0/+3
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| * aac: support decoding AAC streamsMax Kellermann2008-08-301-2/+128
| | | | | | | | | | | | Copy some code from aac_decode() to aac_stream_decode() and apply necessary changes to allow streaming audio data. Both functions might be merged later.
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