aboutsummaryrefslogtreecommitdiffstats
path: root/src/mixer/alsa_mixer_plugin.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/mixer/alsa_mixer_plugin.c431
1 files changed, 0 insertions, 431 deletions
diff --git a/src/mixer/alsa_mixer_plugin.c b/src/mixer/alsa_mixer_plugin.c
deleted file mode 100644
index 22e4e22bd..000000000
--- a/src/mixer/alsa_mixer_plugin.c
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * Copyright (C) 2003-2011 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 "mixer_api.h"
-#include "output_api.h"
-#include "event_pipe.h"
-
-#include <glib.h>
-#include <alsa/asoundlib.h>
-
-#define VOLUME_MIXER_ALSA_DEFAULT "default"
-#define VOLUME_MIXER_ALSA_CONTROL_DEFAULT "PCM"
-#define VOLUME_MIXER_ALSA_INDEX_DEFAULT 0
-
-struct alsa_mixer_source {
- GSource source;
-
- snd_mixer_t *mixer;
-
- /** a linked list of all registered GPollFD objects */
- GSList *fds;
-};
-
-struct alsa_mixer {
- /** the base mixer class */
- struct mixer base;
-
- 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;
-
- struct alsa_mixer_source *source;
-};
-
-/**
- * The quark used for GError.domain.
- */
-static inline GQuark
-alsa_mixer_quark(void)
-{
- return g_quark_from_static_string("alsa_mixer");
-}
-
-/*
- * GSource helper functions
- *
- */
-
-static GSList **
-find_fd(GSList **list_r, int fd)
-{
- while (true) {
- GSList *list = *list_r;
- if (list == NULL)
- return NULL;
-
- GPollFD *p = list->data;
- if (p->fd == fd)
- return list_r;
-
- list_r = &list->next;
- }
-}
-
-static void
-alsa_mixer_update_fd(struct alsa_mixer_source *source, const struct pollfd *p,
- GSList **old_r)
-{
- GSList **found_r = find_fd(old_r, p->fd);
- if (found_r == NULL) {
- /* new fd */
- GPollFD *q = g_new(GPollFD, 1);
- q->fd = p->fd;
- q->events = p->events;
- g_source_add_poll(&source->source, q);
- source->fds = g_slist_prepend(source->fds, q);
- return;
- }
-
- GSList *found = *found_r;
- *found_r = found->next;
-
- GPollFD *q = found->data;
- if (q->events != p->events) {
- /* refresh events */
- g_source_remove_poll(&source->source, q);
- q->events = p->events;
- g_source_add_poll(&source->source, q);
- }
-
- found->next = source->fds;
- source->fds = found;
-}
-
-static void
-alsa_mixer_update_fds(struct alsa_mixer_source *source)
-{
- int count = snd_mixer_poll_descriptors_count(source->mixer);
- if (count < 0)
- count = 0;
-
- struct pollfd *pfds = g_new(struct pollfd, count);
- count = snd_mixer_poll_descriptors(source->mixer, pfds, count);
- if (count < 0)
- count = 0;
-
- GSList *old = source->fds;
- source->fds = NULL;
-
- for (int i = 0; i < count; ++i)
- alsa_mixer_update_fd(source, &pfds[i], &old);
- g_free(pfds);
-
- for (; old != NULL; old = old->next) {
- GPollFD *q = old->data;
- g_source_remove_poll(&source->source, q);
- g_free(q);
- }
-
- g_slist_free(old);
-}
-
-/*
- * GSource methods
- *
- */
-
-static gboolean
-alsa_mixer_source_prepare(GSource *_source, G_GNUC_UNUSED gint *timeout_r)
-{
- struct alsa_mixer_source *source = (struct alsa_mixer_source *)_source;
- alsa_mixer_update_fds(source);
-
- return false;
-}
-
-static gboolean
-alsa_mixer_source_check(GSource *_source)
-{
- struct alsa_mixer_source *source = (struct alsa_mixer_source *)_source;
-
- for (const GSList *i = source->fds; i != NULL; i = i->next) {
- const GPollFD *poll_fd = i->data;
- if (poll_fd->revents != 0)
- return true;
- }
-
- return false;
-}
-
-static gboolean
-alsa_mixer_source_dispatch(GSource *_source,
- G_GNUC_UNUSED GSourceFunc callback,
- G_GNUC_UNUSED gpointer user_data)
-{
- struct alsa_mixer_source *source = (struct alsa_mixer_source *)_source;
-
- snd_mixer_handle_events(source->mixer);
- return true;
-}
-
-static void
-alsa_mixer_source_finalize(GSource *_source)
-{
- struct alsa_mixer_source *source = (struct alsa_mixer_source *)_source;
-
- for (GSList *i = source->fds; i != NULL; i = i->next)
- g_free(i->data);
-
- g_slist_free(source->fds);
-}
-
-static GSourceFuncs alsa_mixer_source_funcs = {
- .prepare = alsa_mixer_source_prepare,
- .check = alsa_mixer_source_check,
- .dispatch = alsa_mixer_source_dispatch,
- .finalize = alsa_mixer_source_finalize,
-};
-
-/*
- * libasound callbacks
- *
- */
-
-static int
-alsa_mixer_elem_callback(G_GNUC_UNUSED snd_mixer_elem_t *elem, unsigned mask)
-{
- if (mask & SND_CTL_EVENT_MASK_VALUE)
- event_pipe_emit(PIPE_EVENT_MIXER);
-
- return 0;
-}
-
-/*
- * mixer_plugin methods
- *
- */
-
-static struct mixer *
-alsa_mixer_init(G_GNUC_UNUSED void *ao, const struct config_param *param,
- G_GNUC_UNUSED GError **error_r)
-{
- struct alsa_mixer *am = g_new(struct alsa_mixer, 1);
-
- mixer_init(&am->base, &alsa_mixer_plugin);
-
- am->device = config_get_block_string(param, "mixer_device",
- VOLUME_MIXER_ALSA_DEFAULT);
- am->control = config_get_block_string(param, "mixer_control",
- VOLUME_MIXER_ALSA_CONTROL_DEFAULT);
- am->index = config_get_block_unsigned(param, "mixer_index",
- VOLUME_MIXER_ALSA_INDEX_DEFAULT);
-
- return &am->base;
-}
-
-static void
-alsa_mixer_finish(struct mixer *data)
-{
- struct alsa_mixer *am = (struct alsa_mixer *)data;
-
- g_free(am);
-
- /* free libasound's config cache */
- snd_config_update_free_global();
-}
-
-G_GNUC_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 != NULL; elem = snd_mixer_elem_next(elem)) {
- if (snd_mixer_elem_get_type(elem) == SND_MIXER_ELEM_SIMPLE &&
- g_ascii_strcasecmp(snd_mixer_selem_get_name(elem),
- name) == 0 &&
- snd_mixer_selem_get_index(elem) == idx)
- return elem;
- }
-
- return NULL;
-}
-
-static bool
-alsa_mixer_setup(struct alsa_mixer *am, GError **error_r)
-{
- int err;
-
- if ((err = snd_mixer_attach(am->handle, am->device)) < 0) {
- g_set_error(error_r, alsa_mixer_quark(), err,
- "failed to attach to %s: %s",
- am->device, snd_strerror(err));
- return false;
- }
-
- if ((err = snd_mixer_selem_register(am->handle, NULL,
- NULL)) < 0) {
- g_set_error(error_r, alsa_mixer_quark(), err,
- "snd_mixer_selem_register() failed: %s",
- snd_strerror(err));
- return false;
- }
-
- if ((err = snd_mixer_load(am->handle)) < 0) {
- g_set_error(error_r, alsa_mixer_quark(), err,
- "snd_mixer_load() failed: %s\n",
- snd_strerror(err));
- return false;
- }
-
- am->elem = alsa_mixer_lookup_elem(am->handle, am->control, am->index);
- if (am->elem == NULL) {
- g_set_error(error_r, alsa_mixer_quark(), 0,
- "no such mixer control: %s", am->control);
- return false;
- }
-
- snd_mixer_selem_get_playback_volume_range(am->elem,
- &am->volume_min,
- &am->volume_max);
-
- snd_mixer_elem_set_callback(am->elem, alsa_mixer_elem_callback);
-
- am->source = (struct alsa_mixer_source *)
- g_source_new(&alsa_mixer_source_funcs, sizeof(*am->source));
- am->source->mixer = am->handle;
- am->source->fds = NULL;
- g_source_attach(&am->source->source, g_main_context_default());
-
- return true;
-}
-
-static bool
-alsa_mixer_open(struct mixer *data, GError **error_r)
-{
- struct alsa_mixer *am = (struct alsa_mixer *)data;
- int err;
-
- am->volume_set = -1;
-
- err = snd_mixer_open(&am->handle, 0);
- if (err < 0) {
- g_set_error(error_r, alsa_mixer_quark(), err,
- "snd_mixer_open() failed: %s", snd_strerror(err));
- return false;
- }
-
- if (!alsa_mixer_setup(am, error_r)) {
- snd_mixer_close(am->handle);
- return false;
- }
-
- return true;
-}
-
-static void
-alsa_mixer_close(struct mixer *data)
-{
- struct alsa_mixer *am = (struct alsa_mixer *)data;
-
- assert(am->handle != NULL);
-
- g_source_destroy(&am->source->source);
- g_source_unref(&am->source->source);
-
- snd_mixer_elem_set_callback(am->elem, NULL);
- snd_mixer_close(am->handle);
-}
-
-static int
-alsa_mixer_get_volume(struct mixer *mixer, GError **error_r)
-{
- struct alsa_mixer *am = (struct alsa_mixer *)mixer;
- int err;
- int ret;
- long level;
-
- assert(am->handle != NULL);
-
- err = snd_mixer_handle_events(am->handle);
- if (err < 0) {
- g_set_error(error_r, alsa_mixer_quark(), err,
- "snd_mixer_handle_events() failed: %s",
- snd_strerror(err));
- return false;
- }
-
- err = snd_mixer_selem_get_playback_volume(am->elem,
- SND_MIXER_SCHN_FRONT_LEFT,
- &level);
- if (err < 0) {
- g_set_error(error_r, alsa_mixer_quark(), err,
- "failed to read ALSA volume: %s",
- snd_strerror(err));
- return false;
- }
-
- ret = ((am->volume_set / 100.0) * (am->volume_max - am->volume_min)
- + am->volume_min) + 0.5;
- if (am->volume_set > 0 && ret == level) {
- ret = am->volume_set;
- } else {
- ret = (int)(100 * (((float)(level - am->volume_min)) /
- (am->volume_max - am->volume_min)) + 0.5);
- }
-
- return ret;
-}
-
-static bool
-alsa_mixer_set_volume(struct mixer *mixer, unsigned volume, GError **error_r)
-{
- struct alsa_mixer *am = (struct alsa_mixer *)mixer;
- float vol;
- long level;
- int err;
-
- assert(am->handle != NULL);
-
- vol = volume;
-
- am->volume_set = vol + 0.5;
-
- level = (long)(((vol / 100.0) * (am->volume_max - am->volume_min) +
- am->volume_min) + 0.5);
- level = level > am->volume_max ? am->volume_max : level;
- level = level < am->volume_min ? am->volume_min : level;
-
- err = snd_mixer_selem_set_playback_volume_all(am->elem, level);
- if (err < 0) {
- g_set_error(error_r, alsa_mixer_quark(), err,
- "failed to set ALSA volume: %s",
- snd_strerror(err));
- return false;
- }
-
- return true;
-}
-
-const struct mixer_plugin alsa_mixer_plugin = {
- .init = alsa_mixer_init,
- .finish = alsa_mixer_finish,
- .open = alsa_mixer_open,
- .close = alsa_mixer_close,
- .get_volume = alsa_mixer_get_volume,
- .set_volume = alsa_mixer_set_volume,
- .global = true,
-};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 02:39:56 +0000