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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <errno.h>
  31 #include <sys/types.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <ctype.h>
  35
  36 #include <pulse/xmalloc.h>
  37 #include <pulse/volume.h>
  38 #include <pulse/channelmap.h>
  39
  40 #include <pulsecore/core-error.h>
  41 #include <pulsecore/module.h>
  42 #include <pulsecore/core-util.h>
  43 #include <pulsecore/modargs.h>
  44 #include <pulsecore/log.h>
  45 #include <pulsecore/sink-input.h>
  46
  47 #include "module-position-event-sounds-symdef.h"
  48
  49 PA_MODULE_AUTHOR("Lennart Poettering");
  50 PA_MODULE_DESCRIPTION("Position event sounds between L and R depending on the position on screen of the widget triggering them.");
  51 PA_MODULE_VERSION(PACKAGE_VERSION);
  52 PA_MODULE_LOAD_ONCE(TRUE);
  53
  54 static const char* const valid_modargs[] = {
  55     NULL
  56 };
  57
  58 struct userdata {
  59     pa_core *core;
  60     pa_hook_slot *sink_input_fixate_hook_slot;
  61 };
  62
  63 static pa_bool_t is_left(pa_channel_position_t p) {
  64     return
  65         p == PA_CHANNEL_POSITION_FRONT_LEFT ||
  66         p == PA_CHANNEL_POSITION_REAR_LEFT ||
  67         p == PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER ||
  68         p == PA_CHANNEL_POSITION_SIDE_LEFT ||
  69         p == PA_CHANNEL_POSITION_TOP_FRONT_LEFT ||
  70         p == PA_CHANNEL_POSITION_TOP_REAR_LEFT;
  71 }
  72
  73 static pa_bool_t is_right(pa_channel_position_t p) {
  74     return
  75         p == PA_CHANNEL_POSITION_FRONT_RIGHT ||
  76         p == PA_CHANNEL_POSITION_REAR_RIGHT||
  77         p == PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER ||
  78         p == PA_CHANNEL_POSITION_SIDE_RIGHT ||
  79         p == PA_CHANNEL_POSITION_TOP_FRONT_RIGHT ||
  80         p == PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
  81 }
  82
  83 static pa_hook_result_t sink_input_fixate_hook_callback(pa_core *core, pa_sink_input_new_data *data, struct userdata *u) {
  84     const char *hpos;
  85     double f;
  86     unsigned c;
  87     char t[PA_CVOLUME_SNPRINT_MAX];
  88
  89     pa_assert(data);
  90
  91     if (!(hpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_HPOS)))
  92         return PA_HOOK_OK;
  93
  94     if (pa_atod(hpos, &f) < 0) {
  95         pa_log_warn("Failed to parse "PA_PROP_EVENT_MOUSE_HPOS" property '%s'.", hpos);
  96         return PA_HOOK_OK;
  97     }
  98
  99     if (f < 0.0 || f > 1.0) {
 100         pa_log_warn("Property "PA_PROP_EVENT_MOUSE_HPOS" out of range %0.2f", f);
 101         return PA_HOOK_OK;
 102     }
 103
 104     pa_log_debug("Positioning event sound '%s' at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
 105
 106     if (!data->volume_is_set) {
 107         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 108         data->volume_is_set = TRUE;
 109     }
 110
 111     for (c = 0; c < data->sample_spec.channels; c++) {
 112
 113         if (is_left(data->channel_map.map[c]))
 114             data->volume.values[c] =
 115                 pa_sw_volume_multiply(data->volume.values[c], (pa_volume_t) (PA_VOLUME_NORM * (1.0 - f)));
 116
 117         if (is_right(data->channel_map.map[c]))
 118             data->volume.values[c] =
 119                 pa_sw_volume_multiply(data->volume.values[c], (pa_volume_t) (PA_VOLUME_NORM * f));
 120     }
 121
 122     pa_log_debug("Final volume %s.", pa_cvolume_snprint(t, sizeof(t), &data->volume));
 123
 124     return PA_HOOK_OK;
 125 }
 126
 127 int pa__init(pa_module*m) {
 128     pa_modargs *ma = NULL;
 129     struct userdata *u;
 130
 131     pa_assert(m);
 132
 133     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 134         pa_log("Failed to parse module arguments");
 135         goto fail;
 136     }
 137
 138     m->userdata = u = pa_xnew(struct userdata, 1);
 139     u->core = m->core;
 140     u->sink_input_fixate_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_FIXATE], (pa_hook_cb_t) sink_input_fixate_hook_callback, u);
 141
 142     pa_modargs_free(ma);
 143
 144     return 0;
 145
 146 fail:
 147     pa__done(m);
 148
 149     if (ma)
 150         pa_modargs_free(ma);
 151
 152     return  -1;
 153 }
 154
 155 void pa__done(pa_module*m) {
 156     struct userdata* u;
 157
 158     pa_assert(m);
 159
 160     if (!(u = m->userdata))
 161         return;
 162
 163     if (u->sink_input_fixate_hook_slot)
 164         pa_hook_slot_free(u->sink_input_fixate_hook_slot);
 165
 166     pa_xfree(u);
 167 }