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* audio: don't free uninitialized audio_bufferMax Kellermann2008-09-101-5/+6
| | | | | | | free(NULL) isn't explicitly forbidden, but isn't exactly good style. Check the rare case that the audio buffer isn't initialized yet in closeAudioDevice(). In this case, we also don't have to call flushAudioBuffer().
* audio: added function audio_buffer_resize()Max Kellermann2008-09-101-4/+22
| | | | | | To make openAudioDevice() smaller and more readable, move code to a static function. Also don't use realloc(), since the old value of the buffer isn't needed anymore, saving a memcpy().
* audio: moved static variables into struct audio_bufferMax Kellermann2008-09-101-26/+30
| | | | | | | There are too many static variables in audio.c - organize all properties of the audio buffer in a struct. The current audio format is also a property of the buffer, since it describes the buffer's data format.
* audio: don't allow isCurrentAudioFormat(NULL)Max Kellermann2008-09-101-3/+5
| | | | | | Passing NULL to this function doesn't make sense, and complicates its implementation. The one caller which might pass NULL should rather check this.
* audio: removed isAudioDeviceOpen()Max Kellermann2008-09-102-7/+0
| | | | The function isAudioDeviceOpen() is never used.
* audio_format: added audio_format_clear() and audio_format_defined()Max Kellermann2008-09-102-1/+13
| | | | | | | | | audio_format_clear() sets an audio_format struct to an cleared (undefined) state, which is both faster and smaller than memset(0). audio_format_defined() checks if the audio_format struct actually has a defined value (i.e. non-zero). Both can be used to avoid pointers to audio_format, replacing the "NULL" value with an "undefined" audio_format.
* client: simplified client_read()Max Kellermann2008-09-101-3/+5
| | | | Remove one comparison by changing branch order.
* client: client_input_received() returns 0Max Kellermann2008-09-101-4/+2
| | | | | | | | | 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().
* client: check for COMMAND_RETURN_CLOSEMax Kellermann2008-09-101-15/+14
| | | | | | | 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.
* client: renamed local variable "selret" to "ret"Max Kellermann2008-09-101-4/+4
| | | | It's easier to reuse the variable if it has a more generic name.
* client: moved CLOSE/KILL check after client_process_line()Max Kellermann2008-09-101-4/+3
| | | | Don't update client data if it is going to be closed anyway.
* audio: moved cmpAudioFormat() to audio_format.hMax Kellermann2008-09-095-22/+14
| | | | | Rename it to audio_format_equals() and return "true" if they are equal.
* audio: replaced copyAudioFormat() with simple assignmentMax Kellermann2008-09-094-21/+9
| | | | | | | | | The "!src" check in copyAudioFormat() used to hide bugs - one should never pass NULL to it. There is one caller which might pass NULL, add a check in this caller. Instead of doing mempcy(), we can simply assign the structures, which looks more natural.
* output: renamed the functions in output_control.cMax Kellermann2008-09-094-34/+34
| | | | Getting rid of CamcelCase, again.
* output: moved code from audioOutput.c to output_control.cMax Kellermann2008-09-097-216/+281
| | | | | Similar to decoder_control.c, output_control.c will provide functions for controlling the output thread (which will be implemented later).
* output: renamed method namesMax Kellermann2008-09-092-34/+23
| | | | No CamelCase. Also don't declare typedefs for the methods.
* output: removed keepAudioOutputAlive() declarationMax Kellermann2008-09-091-1/+0
| | | | This function is declared, but is neither used nor implemented.
* timer: constant pointersMax Kellermann2008-09-093-3/+3
| | | | | The audio_format argument to timer_new() should be constant, because it is not modified. The same is true for ShoutData.audioFormat.
* storedPlaylist: correctly expand path when writingEric Wong2008-09-091-5/+6
| | | | | Otherwise we'd be writing to whatever directory that mpd is running in.
* alsa: use blocking instead of non-blocking writeEric Wong2008-09-091-1/+6
| | | | | | | | | | | | The way we used non-blocking mode was HORRIBLE. It was non-blocking to ALSA, but we end up blocking in a busy loop that does absolutely NOTHING but retry. We don't check for playback cancellation (like we do in decoders) or anything. This is seriously broken and I can imagine it affects people on fast CPUs more because we do asynchronous output buffering and our ALSA device will always have data ready.
* alsa: snd_pcm_sw_params_set_xfer_align is deprecatedEric Wong2008-09-081-5/+0
| | | | | Lets not use deprecated functions. It's apparently possible to not care about the sw_params stuff at all!
* alsa: only run snd_config_update_free_global once atexitEric Wong2008-09-081-3/+7
| | | | | | | | | This is safer than the patch in http://www.musicpd.org/mantis/view.php?id=1542 with multiple audio outputs enabled. Sadly, I only noticed that patch/problem when I googled for "snd_config_update_free_global"
* alsa: move bitformat reading code out of the wayEric Wong2008-09-081-16/+12
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* alsa: avoid unnecessary heap usage if we don't set a device nameEric Wong2008-09-081-11/+12
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* alsa: get rid of the needless canPause flagEric Wong2008-09-081-3/+0
| | | | | We never use it for anything anyways as we release the device entirely on pause.
* alsa: capitalize "ALSA" consistently in messagesEric Wong2008-09-081-8/+8
| | | | That's the name of this project.
* alsa: optimistically try resuming from suspendEric Wong2008-09-081-6/+4
| | | | | | | | | | | | | | Apparently snd_pcm_hw_params_can_resume() can return false even though my hardware does in fact support resuming. So stop carrying that value in the canResume flag and just try to resume when we're in the suspended state; falling back to snd_pcm_prepare only if resuming fails. libao does something similar on resume, too. While we're at it, use the E() macro which will enable us to have better error reporting. [mk: remove the E() macro stuff]
* strset: fix duplicate valuesMax Kellermann2008-09-081-1/+1
| | | | | Due to a minor typo, the string set had duplicate values, because strset_add() didn't check the base slot properly.
* use strset.h instead of tagTracker.hMax Kellermann2008-09-086-163/+58
| | | | | | | With a large music database, the linear string collection in tagTracker.c becomes very slow. We implemented that in a quick'n'dirty fashion when we removed tree.c, and now we rewrite it using the fast hashed string set.
* added string set libraryMax Kellermann2008-09-083-0/+195
| | | | | | | | "struct strset" is a hashed string set: you can add strings to this library, and it stores them as a set of unique strings. You can get the size of the set, and you can enumerate through all values. This will be used to replace the linear tagTracker library.
* output: const plugin structuresMax Kellermann2008-09-0811-11/+11
| | | | | Since the plugin struct is never modified, we should store it in constant locations.
* output: static audio_output_plugin list as arrayMax Kellermann2008-09-088-80/+104
| | | | | | Instead of having to register each output plugin, store them statically in an array. This eliminates the need for the List library here, and saves some small allocations during startup.
* output: replace audio_output.*Func with audio_output.pluginMax Kellermann2008-09-072-24/+12
| | | | | Instead of copying all that stuff from the audio output plugin to the audio output structure, store a pointer to the plugin.
* output: renamed typedef AudioOutput to struct audio_outputMax Kellermann2008-09-0714-131/+142
| | | | | Also rename AudioOutputPlugin to struct audio_output_plugin, and use forward declarations to reduce include dependencies.
* output: added output_api.hMax Kellermann2008-09-0715-90/+115
| | | | | Just like decoder_api.h, output_api.h provides the audio output API which is used by the plugins.
* pack the struct audio_formatMax Kellermann2008-09-071-1/+1
| | | | | | Due to clumsy layout, the audio_format struct took 12 bytes. Move the "channels" to the end, so it can be merged into the same 32 bit slot as "bits", which reduces the struct size to 8 bytes.
* audio_format: converted typedef AudioFormat to struct audio_formatMax Kellermann2008-09-0734-83/+98
| | | | | Get rid of CamelCase, and don't use a typedef, so we can forward-declare it, and unclutter the include dependencies.
* playlist: return -1 after assert(0)Max Kellermann2008-09-071-0/+1
| | | | | | | print_playlist_result() had an assert(0) at the end, in case there was an invalid result value. With NDEBUG, this resulted in a function not returning a value - add a dummy "return -1" at the end to keep gcc quiet.
* playlist: replaced song_id_exists() with song_id_to_position()Max Kellermann2008-09-071-16/+29
| | | | | | | Since all callers of song_id_exists() will map it to a song position after the check, introduce a new function called song_id_to_position() which performs both the check and the map lookup, including nice assertions.
* command: use client_[gs]et_permission()Max Kellermann2008-09-073-84/+86
| | | | | | Don't pass a pointer to client->permission to processCommand(), better let the code in command.c use the new permission getter/setter functions.
* client: added client_[gs]et_permission()Max Kellermann2008-09-072-0/+14
| | | | | The code in command.c shouldn't mess with a pointer to client->permission. Provide an API for accessing this value.
* command: don't pass permission as pointer where appropriateMax Kellermann2008-09-071-6/+6
| | | | | Some functions don't want to modify a client's permission set. Pass the permissions to them by value, not by reference.
* audio_format: volatile removalEric Wong2008-09-071-3/+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: oops, of course items is now ** and not *Eric Wong2008-09-071-2/+2
| | | | | | Gah, it seems like doing sizeof here either way is error prone. Too easy to leave out a '*' character we can forget.
* tag: lock all accesses to tag_poolEric Wong2008-09-073-6/+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 Wong2008-09-071-11/+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.
* fix -Wcast-qual -Wwrite-strings warningsMax Kellermann2008-09-076-33/+43
| | | | | | | | | The previous patch enabled these warnings. In Eric's branch, they were worked around with a generic deconst_ptr() function. There are several places where we can add "const" to pointers, and in others, libraries want non-const strings. In the latter, convert string literals to "static char[]" variables - this takes the same space, and seems safer than deconsting a string literal.
* removed fdprintf() and client_print()Max Kellermann2008-09-075-120/+0
| | | | | | All callers of fdprintf() have been converted to client_printf() or fprintf(); it is time to remove this clumsy hack now. We can also remove client_print() which took a file descriptor as parameter.
* client: removed client_get_fd()Max Kellermann2008-09-072-15/+0
| | | | | | Now that we have removed all invocations of client_get_fd(), we can safely remove this transitional function. All access to the file descriptor is now hidden behind the interface declared in client.h.
* audio: don't pass "fd" to printAudioDevices()Max Kellermann2008-09-073-9/+12
| | | | Pass the client struct instead.
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