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/***
This file is part of PulseAudio.
Copyright 2006 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio 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 Lesser General Public License
along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <pulse/xmalloc.h>
#include <pulse/volume.h>
#include <pulse/channelmap.h>
#include <pulsecore/module.h>
#include <pulsecore/core-util.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
#include <pulsecore/sink-input.h>
PA_MODULE_AUTHOR("Lennart Poettering");
PA_MODULE_DESCRIPTION("Position event sounds between L and R depending on the position on screen of the widget triggering them.");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(true);
static const char* const valid_modargs[] = {
NULL
};
struct userdata {
pa_hook_slot *sink_input_fixate_hook_slot;
const char *name;
};
static int parse_pos(const char *pos, double *f) {
if (pa_atod(pos, f) < 0) {
pa_log_warn("Failed to parse hpos/vpos property '%s'.", pos);
return -1;
}
if (*f < 0.0 || *f > 1.0) {
pa_log_debug("Property hpos/vpos out of range %0.2f", *f);
*f = PA_CLAMP(*f, 0.0, 1.0);
}
return 0;
}
static pa_hook_result_t sink_input_fixate_hook_callback(pa_core *core, pa_sink_input_new_data *data, struct userdata *u) {
const char *hpos, *vpos, *role, *id;
double f;
char t[PA_CVOLUME_SNPRINT_VERBOSE_MAX];
pa_cvolume v;
pa_assert(data);
if (!(role = pa_proplist_gets(data->proplist, PA_PROP_MEDIA_ROLE)))
return PA_HOOK_OK;
if (!pa_streq(role, "event"))
return PA_HOOK_OK;
if ((id = pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID))) {
/* The test sounds should never be positioned in space, since
* they might be triggered themselves to configure the speakers
* in space, which we don't want to mess up. */
if (pa_startswith(id, "audio-channel-"))
return PA_HOOK_OK;
if (pa_streq(id, "audio-volume-change"))
return PA_HOOK_OK;
if (pa_streq(id, "audio-test-signal"))
return PA_HOOK_OK;
}
if (!(hpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_HPOS)))
hpos = pa_proplist_gets(data->proplist, PA_PROP_WINDOW_HPOS);
if (!(vpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_VPOS)))
vpos = pa_proplist_gets(data->proplist, PA_PROP_WINDOW_VPOS);
if (!hpos && !vpos)
return PA_HOOK_OK;
pa_cvolume_reset(&v, data->sink->sample_spec.channels);
if (hpos) {
if (parse_pos(hpos, &f) < 0)
return PA_HOOK_OK;
if (pa_channel_map_can_balance(&data->sink->channel_map)) {
pa_log_debug("Positioning event sound '%s' horizontally at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
pa_cvolume_set_balance(&v, &data->sink->channel_map, f*2.0-1.0);
}
}
if (vpos) {
if (parse_pos(vpos, &f) < 0)
return PA_HOOK_OK;
if (pa_channel_map_can_fade(&data->sink->channel_map)) {
pa_log_debug("Positioning event sound '%s' vertically at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
pa_cvolume_set_fade(&v, &data->sink->channel_map, f*2.0-1.0);
}
}
pa_log_debug("Final volume factor %s.",
pa_cvolume_snprint_verbose(t,
sizeof(t),
&v,
&data->sink->channel_map,
data->sink->flags & PA_SINK_DECIBEL_VOLUME));
pa_sink_input_new_data_add_volume_factor_sink(data, u->name, &v);
return PA_HOOK_OK;
}
int pa__init(pa_module*m) {
pa_modargs *ma;
struct userdata *u;
pa_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments");
goto fail;
}
m->userdata = u = pa_xnew(struct userdata, 1);
u->sink_input_fixate_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_FIXATE], PA_HOOK_EARLY, (pa_hook_cb_t) sink_input_fixate_hook_callback, u);
pa_modargs_free(ma);
u->name = m->name;
return 0;
fail:
pa__done(m);
return -1;
}
void pa__done(pa_module*m) {
struct userdata* u;
pa_assert(m);
if (!(u = m->userdata))
return;
if (u->sink_input_fixate_hook_slot)
pa_hook_slot_free(u->sink_input_fixate_hook_slot);
pa_xfree(u);
}
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