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* Initial cut of fork() => pthreads() for decoder and playerEric Wong2008-04-121-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I initially started to do a heavy rewrite that changed the way processes communicated, but that was too much to do at once. So this change only focuses on replacing the player and decode processes with threads and using condition variables instead of polling in loops; so the changeset itself is quiet small. * The shared output buffer variables will still need locking to guard against race conditions. So in this effect, we're probably just as buggy as before. The reduced context-switching overhead of using threads instead of processes may even make bugs show up more or less often... * Basic functionality appears to be working for playing local (and NFS) audio, including: play, pause, stop, seek, previous, next, and main playlist editing * I haven't tested HTTP streams yet, they should work. * I've only tested ALSA and Icecast. ALSA works fine, Icecast metadata seems to get screwy at times and breaks song advancement in the playlist at times. * state file loading works, too (after some last-minute hacks with non-blocking wakeup functions) * The non-blocking (*_nb) variants of the task management functions are probably overused. They're more lenient and easier to use because much of our code is still based on our previous polling-based system. * It currently segfaults on exit. I haven't paid much attention to the exit/signal-handling routines other than ensuring it compiles. At least the state file seems to work. We don't do any cleanups of the threads on exit, yet. * Update is still done in a child process and not in a thread. To do this in a thread, we'll need to ensure it does proper locking and communication with the main thread; but should require less memory in the end because we'll be updating the database "in-place" rather than updating a copy and then bulk-loading when done. * We're more sensitive to bugs in 3rd party libraries now. My plan is to eventually use a master process which forks() and restarts the child when it dies: locking and communication with the main thread; but should require less memory in the end because we'll be updating the database "in-place" rather than updating a copy and then bulk-loading when done. * We're more sensitive to bugs in 3rd party libraries now. My plan is to eventually use a master process which forks() and restarts the child when it dies: master - just does waitpid() + fork() in a loop \- main thread \- decoder thread \- player thread At the beginning of every song, the main thread will set a dirty flag and update the state file. This way, if we encounter a song that triggers a segfault killing the main thread, the master will start the replacement main on the next song. * The main thread still wakes up every second on select() to check for signals; which affects power management. [merged r7138 from branches/ew] git-svn-id: https://svn.musicpd.org/mpd/trunk@7240 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* wavpack_plugin: cleanups after the last commitEric Wong2008-03-261-2/+2
| | | | | | | | * malloc() => xmalloc() for error checking * strncpy() replaced with memcpy(), memcpy appears perfectly safe here and mpd does not ever use strncpy() (see r4491) git-svn-id: https://svn.musicpd.org/mpd/trunk@7211 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* WavPack improvementsLaszlo Ashin2008-03-261-29/+130
| | | | | | | | | | This patch does the following: -enables WVC support for streams as well, -improves MPD inputStream <=> WavPack stream connector, -fixes two compile warnings (which were caused by MPD API change). Mantis #1660 <http://musicpd.org/mantis/view.php?id=1660> git-svn-id: https://svn.musicpd.org/mpd/trunk@7210 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* Cleanup #includes of standard system headers and put them in one placeEric Wong2008-01-031-7/+1
| | | | | | | | | | | | | This will make refactoring features easier, especially now that pthreads support and larger refactorings are on the horizon. Hopefully, this will make porting to other platforms (even non-UNIX-like ones for masochists) easier, too. os_compat.h will house all the #includes for system headers considered to be the "core" of MPD. Headers for optional features will be left to individual source files. git-svn-id: https://svn.musicpd.org/mpd/trunk@7130 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* Simplify decode cleanup logic a bitEric Wong2008-01-011-4/+0
| | | | | | | | | | | DECODE_STATE_STOP is always set as dc->state, and dc->stop is always cleared. So handle it in decodeStart once rather than doing it in every plugin. While we're at it, fix a long-standing (but difficult to trigger) bug in mpc_decode where we failed to return if mpc_decoder_initialize() fails. git-svn-id: https://svn.musicpd.org/mpd/trunk@7122 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* Fix wavpack endian issues, tested to work for 16bit. (after blowing my ears ↵Qball Cow2007-10-031-1/+18
| | | | | off with white noise) git-svn-id: https://svn.musicpd.org/mpd/trunk@6952 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* inputPlugins/wavpack_plugin: enable ReplayGain codeJ. Alexander Treuman2007-06-251-14/+3
| | | | | | Turns out the fix was as simple as specifying the OPEN_TAGS flag when opening the file. Thanks again to Kodest for figuring this one out. git-svn-id: https://svn.musicpd.org/mpd/trunk@6657 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* inputPlugins/wavpack_plugin: adding dummy code for ReplayGain supportJ. Alexander Treuman2007-06-251-4/+84
| | | | | | | | | This ReplayGain code is currently disabled because WavpackGetTagItem can't seem to find replaygain_* fields in APEv2 tags (which is how wvgain stores ReplayGain values). Additionally, because APEv2 tags are stored at the end of the file, this code is only implemented for regular files and not HTTP streams. Using HTTP seeking it *may* be possible to implement it for both. git-svn-id: https://svn.musicpd.org/mpd/trunk@6656 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* Updating Kodest's name/email.J. Alexander Treuman2007-06-251-1/+1
| | | git-svn-id: https://svn.musicpd.org/mpd/trunk@6654 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* Adding WavPack support. Patch courtesy Kodest.J. Alexander Treuman2007-06-241-0/+422
git-svn-id: https://svn.musicpd.org/mpd/trunk@6651 09075e82-0dd4-0310-85a5-a0d7c8717e4f