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 <errno.h>
  28 #include <sys/types.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31
  32 #include <pulse/xmalloc.h>
  33 #include <pulse/volume.h>
  34 #include <pulse/channelmap.h>
  35
  36 #include <pulsecore/module.h>
  37 #include <pulsecore/core-util.h>
  38 #include <pulsecore/modargs.h>
  39 #include <pulsecore/log.h>
  40 #include <pulsecore/sink-input.h>
  41
  42 #include "module-position-event-sounds-symdef.h"
  43
  44 PA_MODULE_AUTHOR("Lennart Poettering");
  45 PA_MODULE_DESCRIPTION("Position event sounds between L and R depending on the position on screen of the widget triggering them.");
  46 PA_MODULE_VERSION(PACKAGE_VERSION);
  47 PA_MODULE_LOAD_ONCE(true);
  48
  49 static const char* const valid_modargs[] = {
  50     NULL
  51 };
  52
  53 struct userdata {
  54     pa_hook_slot *sink_input_fixate_hook_slot;
  55     const char *name;
  56 };
  57
  58 static int parse_pos(const char *pos, double *f) {
  59
  60     if (pa_atod(pos, f) < 0) {
  61         pa_log_warn("Failed to parse hpos/vpos property '%s'.", pos);
  62         return -1;
  63     }
  64
  65     if (*f < 0.0 || *f > 1.0) {
  66         pa_log_debug("Property hpos/vpos out of range %0.2f", *f);
  67
  68         *f = PA_CLAMP(*f, 0.0, 1.0);
  69     }
  70
  71     return 0;
  72 }
  73
  74 static pa_hook_result_t sink_input_fixate_hook_callback(pa_core *core, pa_sink_input_new_data *data, struct userdata *u) {
  75     const char *hpos, *vpos, *role, *id;
  76     double f;
  77     char t[PA_CVOLUME_SNPRINT_VERBOSE_MAX];
  78     pa_cvolume v;
  79
  80     pa_assert(data);
  81
  82     if (!(role = pa_proplist_gets(data->proplist, PA_PROP_MEDIA_ROLE)))
  83         return PA_HOOK_OK;
  84
  85     if (!pa_streq(role, "event"))
  86         return PA_HOOK_OK;
  87
  88     if ((id = pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID))) {
  89
  90         /* The test sounds should never be positioned in space, since
  91          * they might be triggered themselves to configure the speakers
  92          * in space, which we don't want to mess up. */
  93
  94         if (pa_startswith(id, "audio-channel-"))
  95             return PA_HOOK_OK;
  96
  97         if (pa_streq(id, "audio-volume-change"))
  98             return PA_HOOK_OK;
  99
 100         if (pa_streq(id, "audio-test-signal"))
 101             return PA_HOOK_OK;
 102     }
 103
 104     if (!(hpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_HPOS)))
 105         hpos = pa_proplist_gets(data->proplist, PA_PROP_WINDOW_HPOS);
 106
 107     if (!(vpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_VPOS)))
 108         vpos = pa_proplist_gets(data->proplist, PA_PROP_WINDOW_VPOS);
 109
 110     if (!hpos && !vpos)
 111         return PA_HOOK_OK;
 112
 113     pa_cvolume_reset(&v, data->sink->sample_spec.channels);
 114
 115     if (hpos) {
 116         if (parse_pos(hpos, &f) < 0)
 117             return PA_HOOK_OK;
 118
 119         if (pa_channel_map_can_balance(&data->sink->channel_map)) {
 120             pa_log_debug("Positioning event sound '%s' horizontally at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
 121             pa_cvolume_set_balance(&v, &data->sink->channel_map, f*2.0-1.0);
 122         }
 123     }
 124
 125     if (vpos) {
 126         if (parse_pos(vpos, &f) < 0)
 127             return PA_HOOK_OK;
 128
 129         if (pa_channel_map_can_fade(&data->sink->channel_map)) {
 130             pa_log_debug("Positioning event sound '%s' vertically at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
 131             pa_cvolume_set_fade(&v, &data->sink->channel_map, f*2.0-1.0);
 132         }
 133     }
 134
 135     pa_log_debug("Final volume factor %s.",
 136                  pa_cvolume_snprint_verbose(t,
 137                                             sizeof(t),
 138                                             &v,
 139                                             &data->sink->channel_map,
 140                                             data->sink->flags & PA_SINK_DECIBEL_VOLUME));
 141     pa_sink_input_new_data_add_volume_factor_sink(data, u->name, &v);
 142
 143     return PA_HOOK_OK;
 144 }
 145
 146 int pa__init(pa_module*m) {
 147     pa_modargs *ma = NULL;
 148     struct userdata *u;
 149
 150     pa_assert(m);
 151
 152     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 153         pa_log("Failed to parse module arguments");
 154         goto fail;
 155     }
 156
 157     m->userdata = u = pa_xnew(struct userdata, 1);
 158     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);
 159
 160     pa_modargs_free(ma);
 161     u->name = m->name;
 162
 163     return 0;
 164
 165 fail:
 166     pa__done(m);
 167
 168     if (ma)
 169         pa_modargs_free(ma);
 170
 171     return -1;
 172 }
 173
 174 void pa__done(pa_module*m) {
 175     struct userdata* u;
 176
 177     pa_assert(m);
 178
 179     if (!(u = m->userdata))
 180         return;
 181
 182     if (u->sink_input_fixate_hook_slot)
 183         pa_hook_slot_free(u->sink_input_fixate_hook_slot);
 184
 185     pa_xfree(u);
 186 }