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Diffstat (limited to 'src/mixer/AlsaMixerPlugin.cxx')
| -rw-r--r-- | src/mixer/AlsaMixerPlugin.cxx | 404 |
1 files changed, 0 insertions, 404 deletions
diff --git a/src/mixer/AlsaMixerPlugin.cxx b/src/mixer/AlsaMixerPlugin.cxx deleted file mode 100644 index 4a4ca433c..000000000 --- a/src/mixer/AlsaMixerPlugin.cxx +++ /dev/null @@ -1,404 +0,0 @@ -/* - * Copyright (C) 2003-2013 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 "MixerInternal.hxx" -#include "OutputAPI.hxx" -#include "GlobalEvents.hxx" -#include "Main.hxx" -#include "event/MultiSocketMonitor.hxx" -#include "event/Loop.hxx" -#include "event/Call.hxx" -#include "util/ASCII.hxx" -#include "util/ReusableArray.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" -#include "Log.hxx" - -#include <algorithm> - -#include <alsa/asoundlib.h> - -#define VOLUME_MIXER_ALSA_DEFAULT "default" -#define VOLUME_MIXER_ALSA_CONTROL_DEFAULT "PCM" -static constexpr unsigned VOLUME_MIXER_ALSA_INDEX_DEFAULT = 0; - -class AlsaMixerMonitor final : private MultiSocketMonitor { - snd_mixer_t *mixer; - - ReusableArray<pollfd> pfd_buffer; - -public: - AlsaMixerMonitor(EventLoop &_loop, snd_mixer_t *_mixer) - :MultiSocketMonitor(_loop), mixer(_mixer) { -#ifdef USE_EPOLL - _loop.AddCall([this](){ InvalidateSockets(); }); -#else - _loop.AddIdle(InitAlsaMixerMonitor, this); -#endif - } - -private: -#ifndef USE_EPOLL - static gboolean InitAlsaMixerMonitor(gpointer data) { - AlsaMixerMonitor &amm = *(AlsaMixerMonitor *)data; - amm.InvalidateSockets(); - return false; - } -#endif - - virtual int PrepareSockets() override; - virtual void DispatchSockets() override; -}; - -class AlsaMixer final : public Mixer { - const char *device; - const char *control; - unsigned int index; - - snd_mixer_t *handle; - snd_mixer_elem_t *elem; - long volume_min; - long volume_max; - int volume_set; - - AlsaMixerMonitor *monitor; - -public: - AlsaMixer():Mixer(alsa_mixer_plugin) {} - - void Configure(const config_param ¶m); - bool Setup(Error &error); - bool Open(Error &error); - void Close(); - - int GetVolume(Error &error); - bool SetVolume(unsigned volume, Error &error); -}; - -static constexpr Domain alsa_mixer_domain("alsa_mixer"); - -int -AlsaMixerMonitor::PrepareSockets() -{ - if (mixer == nullptr) - return -1; - - int count = snd_mixer_poll_descriptors_count(mixer); - if (count < 0) - count = 0; - - struct pollfd *pfds = pfd_buffer.Get(count); - - count = snd_mixer_poll_descriptors(mixer, pfds, count); - if (count < 0) - count = 0; - - struct pollfd *end = pfds + count; - - UpdateSocketList([pfds, end](int fd) -> unsigned { - auto i = std::find_if(pfds, end, [fd](const struct pollfd &pfd){ - return pfd.fd == fd; - }); - if (i == end) - return 0; - - auto events = i->events; - i->events = 0; - return events; - }); - - for (auto i = pfds; i != end; ++i) - if (i->events != 0) - AddSocket(i->fd, i->events); - - return -1; -} - -void -AlsaMixerMonitor::DispatchSockets() -{ - assert(mixer != nullptr); - - int err = snd_mixer_handle_events(mixer); - if (err < 0) { - FormatError(alsa_mixer_domain, - "snd_mixer_handle_events() failed: %s", - snd_strerror(err)); - - if (err == -ENODEV) { - /* the sound device was unplugged; disable - this GSource */ - mixer = nullptr; - InvalidateSockets(); - return; - } - } -} - -/* - * libasound callbacks - * - */ - -static int -alsa_mixer_elem_callback(gcc_unused snd_mixer_elem_t *elem, unsigned mask) -{ - if (mask & SND_CTL_EVENT_MASK_VALUE) - GlobalEvents::Emit(GlobalEvents::MIXER); - - return 0; -} - -/* - * mixer_plugin methods - * - */ - -inline void -AlsaMixer::Configure(const config_param ¶m) -{ - device = param.GetBlockValue("mixer_device", - VOLUME_MIXER_ALSA_DEFAULT); - control = param.GetBlockValue("mixer_control", - VOLUME_MIXER_ALSA_CONTROL_DEFAULT); - index = param.GetBlockValue("mixer_index", - VOLUME_MIXER_ALSA_INDEX_DEFAULT); -} - -static Mixer * -alsa_mixer_init(gcc_unused void *ao, const config_param ¶m, - gcc_unused Error &error) -{ - AlsaMixer *am = new AlsaMixer(); - am->Configure(param); - - return am; -} - -static void -alsa_mixer_finish(Mixer *data) -{ - AlsaMixer *am = (AlsaMixer *)data; - - delete am; - - /* free libasound's config cache */ - snd_config_update_free_global(); -} - -gcc_pure -static snd_mixer_elem_t * -alsa_mixer_lookup_elem(snd_mixer_t *handle, const char *name, unsigned idx) -{ - for (snd_mixer_elem_t *elem = snd_mixer_first_elem(handle); - elem != nullptr; elem = snd_mixer_elem_next(elem)) { - if (snd_mixer_elem_get_type(elem) == SND_MIXER_ELEM_SIMPLE && - StringEqualsCaseASCII(snd_mixer_selem_get_name(elem), - name) && - snd_mixer_selem_get_index(elem) == idx) - return elem; - } - - return nullptr; -} - -inline bool -AlsaMixer::Setup(Error &error) -{ - int err; - - if ((err = snd_mixer_attach(handle, device)) < 0) { - error.Format(alsa_mixer_domain, err, - "failed to attach to %s: %s", - device, snd_strerror(err)); - return false; - } - - if ((err = snd_mixer_selem_register(handle, nullptr, - nullptr)) < 0) { - error.Format(alsa_mixer_domain, err, - "snd_mixer_selem_register() failed: %s", - snd_strerror(err)); - return false; - } - - if ((err = snd_mixer_load(handle)) < 0) { - error.Format(alsa_mixer_domain, err, - "snd_mixer_load() failed: %s\n", - snd_strerror(err)); - return false; - } - - elem = alsa_mixer_lookup_elem(handle, control, index); - if (elem == nullptr) { - error.Format(alsa_mixer_domain, 0, - "no such mixer control: %s", control); - return false; - } - - snd_mixer_selem_get_playback_volume_range(elem, &volume_min, - &volume_max); - - snd_mixer_elem_set_callback(elem, alsa_mixer_elem_callback); - - monitor = new AlsaMixerMonitor(*main_loop, handle); - - return true; -} - -inline bool -AlsaMixer::Open(Error &error) -{ - int err; - - volume_set = -1; - - err = snd_mixer_open(&handle, 0); - if (err < 0) { - error.Format(alsa_mixer_domain, err, - "snd_mixer_open() failed: %s", snd_strerror(err)); - return false; - } - - if (!Setup(error)) { - snd_mixer_close(handle); - return false; - } - - return true; -} - -static bool -alsa_mixer_open(Mixer *data, Error &error) -{ - AlsaMixer *am = (AlsaMixer *)data; - - return am->Open(error); -} - -inline void -AlsaMixer::Close() -{ - assert(handle != nullptr); - - delete monitor; - - snd_mixer_elem_set_callback(elem, nullptr); - snd_mixer_close(handle); -} - -static void -alsa_mixer_close(Mixer *data) -{ - AlsaMixer *am = (AlsaMixer *)data; - am->Close(); -} - -inline int -AlsaMixer::GetVolume(Error &error) -{ - int err; - int ret; - long level; - - assert(handle != nullptr); - - err = snd_mixer_handle_events(handle); - if (err < 0) { - error.Format(alsa_mixer_domain, err, - "snd_mixer_handle_events() failed: %s", - snd_strerror(err)); - return false; - } - - err = snd_mixer_selem_get_playback_volume(elem, - SND_MIXER_SCHN_FRONT_LEFT, - &level); - if (err < 0) { - error.Format(alsa_mixer_domain, err, - "failed to read ALSA volume: %s", - snd_strerror(err)); - return false; - } - - ret = ((volume_set / 100.0) * (volume_max - volume_min) - + volume_min) + 0.5; - if (volume_set > 0 && ret == level) { - ret = volume_set; - } else { - ret = (int)(100 * (((float)(level - volume_min)) / - (volume_max - volume_min)) + 0.5); - } - - return ret; -} - -static int -alsa_mixer_get_volume(Mixer *mixer, Error &error) -{ - AlsaMixer *am = (AlsaMixer *)mixer; - return am->GetVolume(error); -} - -inline bool -AlsaMixer::SetVolume(unsigned volume, Error &error) -{ - float vol; - long level; - int err; - - assert(handle != nullptr); - - vol = volume; - - volume_set = vol + 0.5; - - level = (long)(((vol / 100.0) * (volume_max - volume_min) + - volume_min) + 0.5); - level = level > volume_max ? volume_max : level; - level = level < volume_min ? volume_min : level; - - err = snd_mixer_selem_set_playback_volume_all(elem, level); - if (err < 0) { - error.Format(alsa_mixer_domain, err, - "failed to set ALSA volume: %s", - snd_strerror(err)); - return false; - } - - return true; -} - -static bool -alsa_mixer_set_volume(Mixer *mixer, unsigned volume, Error &error) -{ - AlsaMixer *am = (AlsaMixer *)mixer; - return am->SetVolume(volume, error); -} - -const struct mixer_plugin alsa_mixer_plugin = { - alsa_mixer_init, - alsa_mixer_finish, - alsa_mixer_open, - alsa_mixer_close, - alsa_mixer_get_volume, - alsa_mixer_set_volume, - true, -}; |