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/* $Id$ */
/***
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 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <pulse/xmalloc.h>
#include <pulse/volume.h>
#include <pulse/channelmap.h>
#include <pulsecore/core-error.h>
#include <pulsecore/module.h>
#include <pulsecore/core-util.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
#include <pulsecore/sink-input.h>
#include "module-position-event-sounds-symdef.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_core *core;
pa_hook_slot *sink_input_fixate_hook_slot;
};
static pa_bool_t is_left(pa_channel_position_t p) {
return
p == PA_CHANNEL_POSITION_FRONT_LEFT ||
p == PA_CHANNEL_POSITION_REAR_LEFT ||
p == PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER ||
p == PA_CHANNEL_POSITION_SIDE_LEFT ||
p == PA_CHANNEL_POSITION_TOP_FRONT_LEFT ||
p == PA_CHANNEL_POSITION_TOP_REAR_LEFT;
}
static pa_bool_t is_right(pa_channel_position_t p) {
return
p == PA_CHANNEL_POSITION_FRONT_RIGHT ||
p == PA_CHANNEL_POSITION_REAR_RIGHT||
p == PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER ||
p == PA_CHANNEL_POSITION_SIDE_RIGHT ||
p == PA_CHANNEL_POSITION_TOP_FRONT_RIGHT ||
p == PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
}
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;
double f;
unsigned c;
char t[PA_CVOLUME_SNPRINT_MAX];
pa_assert(data);
if (!(hpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_HPOS)))
return PA_HOOK_OK;
if (pa_atod(hpos, &f) < 0) {
pa_log_warn("Failed to parse "PA_PROP_EVENT_MOUSE_HPOS" property '%s'.", hpos);
return PA_HOOK_OK;
}
if (f < 0.0 || f > 1.0) {
pa_log_warn("Property "PA_PROP_EVENT_MOUSE_HPOS" out of range %0.2f", f);
return PA_HOOK_OK;
}
pa_log_debug("Positioning event sound '%s' at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
if (!data->volume_is_set) {
pa_cvolume_reset(&data->volume, data->sample_spec.channels);
data->volume_is_set = TRUE;
}
for (c = 0; c < data->sample_spec.channels; c++) {
if (is_left(data->channel_map.map[c]))
data->volume.values[c] =
pa_sw_volume_multiply(data->volume.values[c], (pa_volume_t) (PA_VOLUME_NORM * (1.0 - f)));
if (is_right(data->channel_map.map[c]))
data->volume.values[c] =
pa_sw_volume_multiply(data->volume.values[c], (pa_volume_t) (PA_VOLUME_NORM * f));
}
pa_log_debug("Final volume %s.", pa_cvolume_snprint(t, sizeof(t), &data->volume));
return PA_HOOK_OK;
}
int pa__init(pa_module*m) {
pa_modargs *ma = NULL;
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->core = m->core;
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);
return 0;
fail:
pa__done(m);
if (ma)
pa_modargs_free(ma);
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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