From ea5b901bcce20949a8d1fd622a7b03ff6f56ae20 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Thu, 23 Jan 2014 23:49:50 +0100 Subject: output/*: move to output/plugins/ --- src/output/OutputControl.cxx | 325 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 325 insertions(+) create mode 100644 src/output/OutputControl.cxx (limited to 'src/output/OutputControl.cxx') diff --git a/src/output/OutputControl.cxx b/src/output/OutputControl.cxx new file mode 100644 index 000000000..b938754fd --- /dev/null +++ b/src/output/OutputControl.cxx @@ -0,0 +1,325 @@ + +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "OutputControl.hxx" +#include "OutputThread.hxx" +#include "OutputInternal.hxx" +#include "OutputPlugin.hxx" +#include "OutputError.hxx" +#include "MixerControl.hxx" +#include "notify.hxx" +#include "filter/ReplayGainFilterPlugin.hxx" +#include "util/Error.hxx" +#include "Log.hxx" + +#include + +/** after a failure, wait this number of seconds before + automatically reopening the device */ +static constexpr unsigned REOPEN_AFTER = 10; + +struct notify audio_output_client_notify; + +/** + * Waits for command completion. + * + * @param ao the #audio_output instance; must be locked + */ +static void ao_command_wait(struct audio_output *ao) +{ + while (ao->command != AO_COMMAND_NONE) { + ao->mutex.unlock(); + audio_output_client_notify.Wait(); + ao->mutex.lock(); + } +} + +/** + * Sends a command to the #audio_output object, but does not wait for + * completion. + * + * @param ao the #audio_output instance; must be locked + */ +static void ao_command_async(struct audio_output *ao, + enum audio_output_command cmd) +{ + assert(ao->command == AO_COMMAND_NONE); + ao->command = cmd; + ao->cond.signal(); +} + +/** + * Sends a command to the #audio_output object and waits for + * completion. + * + * @param ao the #audio_output instance; must be locked + */ +static void +ao_command(struct audio_output *ao, enum audio_output_command cmd) +{ + ao_command_async(ao, cmd); + ao_command_wait(ao); +} + +/** + * Lock the #audio_output object and execute the command + * synchronously. + */ +static void +ao_lock_command(struct audio_output *ao, enum audio_output_command cmd) +{ + const ScopeLock protect(ao->mutex); + ao_command(ao, cmd); +} + +void +audio_output_set_replay_gain_mode(struct audio_output *ao, + ReplayGainMode mode) +{ + if (ao->replay_gain_filter != nullptr) + replay_gain_filter_set_mode(ao->replay_gain_filter, mode); + if (ao->other_replay_gain_filter != nullptr) + replay_gain_filter_set_mode(ao->other_replay_gain_filter, mode); +} + +void +audio_output_enable(struct audio_output *ao) +{ + if (!ao->thread.IsDefined()) { + if (ao->plugin->enable == nullptr) { + /* don't bother to start the thread now if the + device doesn't even have a enable() method; + just assign the variable and we're done */ + ao->really_enabled = true; + return; + } + + audio_output_thread_start(ao); + } + + ao_lock_command(ao, AO_COMMAND_ENABLE); +} + +void +audio_output_disable(struct audio_output *ao) +{ + if (!ao->thread.IsDefined()) { + if (ao->plugin->disable == nullptr) + ao->really_enabled = false; + else + /* if there's no thread yet, the device cannot + be enabled */ + assert(!ao->really_enabled); + + return; + } + + ao_lock_command(ao, AO_COMMAND_DISABLE); +} + +/** + * Object must be locked (and unlocked) by the caller. + */ +static bool +audio_output_open(struct audio_output *ao, + const AudioFormat audio_format, + const MusicPipe &mp) +{ + bool open; + + assert(ao != nullptr); + assert(ao->allow_play); + assert(audio_format.IsValid()); + + ao->fail_timer.Reset(); + + if (ao->open && audio_format == ao->in_audio_format) { + assert(ao->pipe == &mp || + (ao->always_on && ao->pause)); + + if (ao->pause) { + ao->chunk = nullptr; + ao->pipe = ∓ + + /* unpause with the CANCEL command; this is a + hack, but suits well for forcing the thread + to leave the ao_pause() thread, and we need + to flush the device buffer anyway */ + + /* we're not using audio_output_cancel() here, + because that function is asynchronous */ + ao_command(ao, AO_COMMAND_CANCEL); + } + + return true; + } + + ao->in_audio_format = audio_format; + ao->chunk = nullptr; + + ao->pipe = ∓ + + if (!ao->thread.IsDefined()) + audio_output_thread_start(ao); + + ao_command(ao, ao->open ? AO_COMMAND_REOPEN : AO_COMMAND_OPEN); + open = ao->open; + + if (open && ao->mixer != nullptr) { + Error error; + if (!mixer_open(ao->mixer, error)) + FormatWarning(output_domain, + "Failed to open mixer for '%s'", + ao->name); + } + + return open; +} + +/** + * Same as audio_output_close(), but expects the lock to be held by + * the caller. + */ +static void +audio_output_close_locked(struct audio_output *ao) +{ + assert(ao != nullptr); + assert(ao->allow_play); + + if (ao->mixer != nullptr) + mixer_auto_close(ao->mixer); + + assert(!ao->open || !ao->fail_timer.IsDefined()); + + if (ao->open) + ao_command(ao, AO_COMMAND_CLOSE); + else + ao->fail_timer.Reset(); +} + +bool +audio_output_update(struct audio_output *ao, + const AudioFormat audio_format, + const MusicPipe &mp) +{ + const ScopeLock protect(ao->mutex); + + if (ao->enabled && ao->really_enabled) { + if (ao->fail_timer.Check(REOPEN_AFTER * 1000)) { + return audio_output_open(ao, audio_format, mp); + } + } else if (audio_output_is_open(ao)) + audio_output_close_locked(ao); + + return false; +} + +void +audio_output_play(struct audio_output *ao) +{ + const ScopeLock protect(ao->mutex); + + assert(ao->allow_play); + + if (audio_output_is_open(ao) && !ao->in_playback_loop && + !ao->woken_for_play) { + ao->woken_for_play = true; + ao->cond.signal(); + } +} + +void audio_output_pause(struct audio_output *ao) +{ + if (ao->mixer != nullptr && ao->plugin->pause == nullptr) + /* the device has no pause mode: close the mixer, + unless its "global" flag is set (checked by + mixer_auto_close()) */ + mixer_auto_close(ao->mixer); + + const ScopeLock protect(ao->mutex); + + assert(ao->allow_play); + if (audio_output_is_open(ao)) + ao_command_async(ao, AO_COMMAND_PAUSE); +} + +void +audio_output_drain_async(struct audio_output *ao) +{ + const ScopeLock protect(ao->mutex); + + assert(ao->allow_play); + if (audio_output_is_open(ao)) + ao_command_async(ao, AO_COMMAND_DRAIN); +} + +void audio_output_cancel(struct audio_output *ao) +{ + const ScopeLock protect(ao->mutex); + + if (audio_output_is_open(ao)) { + ao->allow_play = false; + ao_command_async(ao, AO_COMMAND_CANCEL); + } +} + +void +audio_output_allow_play(struct audio_output *ao) +{ + const ScopeLock protect(ao->mutex); + + ao->allow_play = true; + if (audio_output_is_open(ao)) + ao->cond.signal(); +} + +void +audio_output_release(struct audio_output *ao) +{ + if (ao->always_on) + audio_output_pause(ao); + else + audio_output_close(ao); +} + +void audio_output_close(struct audio_output *ao) +{ + assert(ao != nullptr); + assert(!ao->open || !ao->fail_timer.IsDefined()); + + const ScopeLock protect(ao->mutex); + audio_output_close_locked(ao); +} + +void audio_output_finish(struct audio_output *ao) +{ + audio_output_close(ao); + + assert(!ao->fail_timer.IsDefined()); + + if (ao->thread.IsDefined()) { + assert(ao->allow_play); + ao_lock_command(ao, AO_COMMAND_KILL); + ao->thread.Join(); + } + + audio_output_free(ao); +} -- cgit v1.2.3