code.delx.au - pulseaudio/blob - src/modules/module-position-event-sounds.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2006 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <unistd.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <sys/types.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <ctype.h>
  33
  34 #include <pulse/xmalloc.h>
  35 #include <pulse/volume.h>
  36 #include <pulse/channelmap.h>
  37
  38 #include <pulsecore/core-error.h>
  39 #include <pulsecore/module.h>
  40 #include <pulsecore/core-util.h>
  41 #include <pulsecore/modargs.h>
  42 #include <pulsecore/log.h>
  43 #include <pulsecore/sink-input.h>
  44
  45 #include "module-position-event-sounds-symdef.h"
  46
  47 PA_MODULE_AUTHOR("Lennart Poettering");
  48 PA_MODULE_DESCRIPTION("Position event sounds between L and R depending on the position on screen of the widget triggering them.");
  49 PA_MODULE_VERSION(PACKAGE_VERSION);
  50 PA_MODULE_LOAD_ONCE(TRUE);
  51
  52 static const char* const valid_modargs[] = {
  53     NULL
  54 };
  55
  56 struct userdata {
  57     pa_core *core;
  58     pa_hook_slot *sink_input_fixate_hook_slot;
  59 };
  60
  61 static pa_bool_t is_left(pa_channel_position_t p) {
  62     return
  63         p == PA_CHANNEL_POSITION_FRONT_LEFT ||
  64         p == PA_CHANNEL_POSITION_REAR_LEFT ||
  65         p == PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER ||
  66         p == PA_CHANNEL_POSITION_SIDE_LEFT ||
  67         p == PA_CHANNEL_POSITION_TOP_FRONT_LEFT ||
  68         p == PA_CHANNEL_POSITION_TOP_REAR_LEFT;
  69 }
  70
  71 static pa_bool_t is_right(pa_channel_position_t p) {
  72     return
  73         p == PA_CHANNEL_POSITION_FRONT_RIGHT ||
  74         p == PA_CHANNEL_POSITION_REAR_RIGHT||
  75         p == PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER ||
  76         p == PA_CHANNEL_POSITION_SIDE_RIGHT ||
  77         p == PA_CHANNEL_POSITION_TOP_FRONT_RIGHT ||
  78         p == PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
  79 }
  80
  81 static pa_hook_result_t sink_input_fixate_hook_callback(pa_core *core, pa_sink_input_new_data *data, struct userdata *u) {
  82     const char *hpos;
  83     double f;
  84     unsigned c;
  85     char t[PA_CVOLUME_SNPRINT_MAX];
  86
  87     pa_assert(data);
  88
  89     if (!(hpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_HPOS)))
  90         return PA_HOOK_OK;
  91
  92     if (pa_atod(hpos, &f) < 0) {
  93         pa_log_warn("Failed to parse "PA_PROP_EVENT_MOUSE_HPOS" property '%s'.", hpos);
  94         return PA_HOOK_OK;
  95     }
  96
  97     if (f < 0.0 || f > 1.0) {
  98         pa_log_warn("Property "PA_PROP_EVENT_MOUSE_HPOS" out of range %0.2f", f);
  99         return PA_HOOK_OK;
 100     }
 101
 102     pa_log_debug("Positioning event sound '%s' at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
 103
 104     if (!data->volume_is_set) {
 105         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 106         data->volume_is_set = TRUE;
 107     }
 108
 109     for (c = 0; c < data->sample_spec.channels; c++) {
 110
 111         if (is_left(data->channel_map.map[c]))
 112             data->volume.values[c] =
 113                 pa_sw_volume_multiply(data->volume.values[c], (pa_volume_t) (PA_VOLUME_NORM * (1.0 - f)));
 114
 115         if (is_right(data->channel_map.map[c]))
 116             data->volume.values[c] =
 117                 pa_sw_volume_multiply(data->volume.values[c], (pa_volume_t) (PA_VOLUME_NORM * f));
 118     }
 119
 120     pa_log_debug("Final volume %s.", pa_cvolume_snprint(t, sizeof(t), &data->volume));
 121
 122     return PA_HOOK_OK;
 123 }
 124
 125 int pa__init(pa_module*m) {
 126     pa_modargs *ma = NULL;
 127     struct userdata *u;
 128
 129     pa_assert(m);
 130
 131     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 132         pa_log("Failed to parse module arguments");
 133         goto fail;
 134     }
 135
 136     m->userdata = u = pa_xnew(struct userdata, 1);
 137     u->core = m->core;
 138     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);
 139
 140     pa_modargs_free(ma);
 141
 142     return 0;
 143
 144 fail:
 145     pa__done(m);
 146
 147     if (ma)
 148         pa_modargs_free(ma);
 149
 150     return  -1;
 151 }
 152
 153 void pa__done(pa_module*m) {
 154     struct userdata* u;
 155
 156     pa_assert(m);
 157
 158     if (!(u = m->userdata))
 159         return;
 160
 161     if (u->sink_input_fixate_hook_slot)
 162         pa_hook_slot_free(u->sink_input_fixate_hook_slot);
 163
 164     pa_xfree(u);
 165 }