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 2.1 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_hook_slot *sink_input_fixate_hook_slot;
  58 };
  59
  60 static int parse_pos(const char *pos, double *f) {
  61
  62     if (pa_atod(pos, f) < 0) {
  63         pa_log_warn("Failed to parse hpos/vpos property '%s'.", pos);
  64         return -1;
  65     }
  66
  67     if (*f < 0.0 || *f > 1.0) {
  68         pa_log_debug("Property hpos/vpos out of range %0.2f", *f);
  69
  70         *f = PA_CLAMP(*f, 0.0, 1.0);
  71     }
  72
  73     return 0;
  74 }
  75
  76 static pa_hook_result_t sink_input_fixate_hook_callback(pa_core *core, pa_sink_input_new_data *data, struct userdata *u) {
  77     const char *hpos, *vpos, *role, *id;
  78     double f;
  79     char t[PA_CVOLUME_SNPRINT_MAX];
  80     pa_cvolume v;
  81
  82     pa_assert(data);
  83
  84     if (!(role = pa_proplist_gets(data->proplist, PA_PROP_MEDIA_ROLE)))
  85         return PA_HOOK_OK;
  86
  87     if (!pa_streq(role, "event"))
  88         return PA_HOOK_OK;
  89
  90     if ((id = pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID))) {
  91
  92         /* The test sounds should never be positioned in space, since
  93          * they might be trigered themselves to configure the speakers
  94          * in space, which we don't want to mess up. */
  95
  96         if (pa_startswith(id, "audio-channel-"))
  97             return PA_HOOK_OK;
  98
  99         if (pa_streq(id, "audio-volume-change"))
 100             return PA_HOOK_OK;
 101
 102         if (pa_streq(id, "audio-test-signal"))
 103             return PA_HOOK_OK;
 104     }
 105
 106     if (!(hpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_HPOS)))
 107         hpos = pa_proplist_gets(data->proplist, PA_PROP_WINDOW_HPOS);
 108
 109     if (!(vpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_VPOS)))
 110         vpos = pa_proplist_gets(data->proplist, PA_PROP_WINDOW_VPOS);
 111
 112     if (!hpos && !vpos)
 113         return PA_HOOK_OK;
 114
 115     pa_cvolume_reset(&v, data->sink->sample_spec.channels);
 116
 117     if (hpos) {
 118         if (parse_pos(hpos, &f) < 0)
 119             return PA_HOOK_OK;
 120
 121         if (pa_channel_map_can_balance(&data->sink->channel_map)) {
 122             pa_log_debug("Positioning event sound '%s' horizontally at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
 123             pa_cvolume_set_balance(&v, &data->sink->channel_map, f*2.0-1.0);
 124         }
 125     }
 126
 127     if (vpos) {
 128         if (parse_pos(vpos, &f) < 0)
 129             return PA_HOOK_OK;
 130
 131         if (pa_channel_map_can_fade(&data->sink->channel_map)) {
 132             pa_log_debug("Positioning event sound '%s' vertically at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
 133             pa_cvolume_set_fade(&v, &data->sink->channel_map, f*2.0-1.0);
 134         }
 135     }
 136
 137     pa_log_debug("Final volume factor %s.", pa_cvolume_snprint(t, sizeof(t), &v));
 138     pa_sink_input_new_data_apply_volume_factor_sink(data, &v);
 139
 140     return PA_HOOK_OK;
 141 }
 142
 143 int pa__init(pa_module*m) {
 144     pa_modargs *ma = NULL;
 145     struct userdata *u;
 146
 147     pa_assert(m);
 148
 149     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 150         pa_log("Failed to parse module arguments");
 151         goto fail;
 152     }
 153
 154     m->userdata = u = pa_xnew(struct userdata, 1);
 155     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);
 156
 157     pa_modargs_free(ma);
 158
 159     return 0;
 160
 161 fail:
 162     pa__done(m);
 163
 164     if (ma)
 165         pa_modargs_free(ma);
 166
 167     return  -1;
 168 }
 169
 170 void pa__done(pa_module*m) {
 171     struct userdata* u;
 172
 173     pa_assert(m);
 174
 175     if (!(u = m->userdata))
 176         return;
 177
 178     if (u->sink_input_fixate_hook_slot)
 179         pa_hook_slot_free(u->sink_input_fixate_hook_slot);
 180
 181     pa_xfree(u);
 182 }