code.delx.au - pulseaudio/blob - src/modules/module-filter-heuristics.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2011 Colin Guthrie
   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 <pulse/xmalloc.h>
  27
  28 #include <pulsecore/macro.h>
  29 #include <pulsecore/hook-list.h>
  30 #include <pulsecore/core.h>
  31 #include <pulsecore/core-util.h>
  32 #include <pulsecore/sink-input.h>
  33 #include <pulsecore/modargs.h>
  34
  35 #include "module-filter-heuristics-symdef.h"
  36
  37 #define PA_PROP_FILTER_APPLY_MOVING "filter.apply.moving"
  38 #define PA_PROP_FILTER_HEURISTICS "filter.heuristics"
  39
  40 PA_MODULE_AUTHOR("Colin Guthrie");
  41 PA_MODULE_DESCRIPTION("Detect when various filters are desirable");
  42 PA_MODULE_VERSION(PACKAGE_VERSION);
  43 PA_MODULE_LOAD_ONCE(TRUE);
  44
  45 static const char* const valid_modargs[] = {
  46     NULL
  47 };
  48
  49 struct userdata {
  50     pa_core *core;
  51     pa_hook_slot
  52         *sink_input_put_slot,
  53         *sink_input_move_finish_slot,
  54         *source_output_put_slot,
  55         *source_output_move_finish_slot;
  56 };
  57
  58 static pa_hook_result_t process(struct userdata *u, pa_object *o, pa_bool_t is_sink_input) {
  59     const char *want;
  60     pa_proplist *pl, *parent_pl;
  61
  62     if (is_sink_input) {
  63         pl = PA_SINK_INPUT(o)->proplist;
  64         parent_pl = PA_SINK_INPUT(o)->sink->proplist;
  65     } else {
  66         pl = PA_SOURCE_OUTPUT(o)->proplist;
  67         parent_pl = PA_SOURCE_OUTPUT(o)->source->proplist;
  68     }
  69
  70     /* If the stream already specifies what it must have, then let it be. */
  71     if (!pa_proplist_gets(pl, PA_PROP_FILTER_HEURISTICS) && pa_proplist_gets(pl, PA_PROP_FILTER_APPLY))
  72         return PA_HOOK_OK;
  73
  74     /* On phone sinks, make sure we're not applying echo cancellation */
  75     if (pa_str_in_list_spaces(pa_proplist_gets(parent_pl, PA_PROP_DEVICE_INTENDED_ROLES), "phone")) {
  76         const char *apply = pa_proplist_gets(pl, PA_PROP_FILTER_APPLY);
  77
  78         if (apply && pa_streq(apply, "echo-cancel")) {
  79             pa_proplist_unset(pl, PA_PROP_FILTER_APPLY);
  80             pa_proplist_unset(pl, PA_PROP_FILTER_HEURISTICS);
  81         }
  82
  83         return PA_HOOK_OK;
  84     }
  85
  86     want = pa_proplist_gets(pl, PA_PROP_FILTER_WANT);
  87
  88     if (want) {
  89         /* There's a filter that we want, ask module-filter-apply to apply it, and remember that we're managing filter.apply */
  90         pa_proplist_sets(pl, PA_PROP_FILTER_APPLY, want);
  91         pa_proplist_sets(pl, PA_PROP_FILTER_HEURISTICS, "1");
  92     }
  93
  94     return PA_HOOK_OK;
  95 }
  96
  97 static pa_hook_result_t sink_input_put_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
  98     pa_core_assert_ref(core);
  99     pa_sink_input_assert_ref(i);
 100     pa_assert(u);
 101
 102     return process(u, PA_OBJECT(i), TRUE);
 103 }
 104
 105 static pa_hook_result_t sink_input_move_finish_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
 106     pa_core_assert_ref(core);
 107     pa_sink_input_assert_ref(i);
 108     pa_assert(u);
 109
 110     /* module-filter-apply triggered this move, ignore */
 111     if (pa_proplist_gets(i->proplist, PA_PROP_FILTER_APPLY_MOVING))
 112         return PA_HOOK_OK;
 113
 114     return process(u, PA_OBJECT(i), TRUE);
 115 }
 116
 117 static pa_hook_result_t source_output_put_cb(pa_core *core, pa_source_output *i, struct userdata *u) {
 118     pa_core_assert_ref(core);
 119     pa_source_output_assert_ref(i);
 120     pa_assert(u);
 121
 122     return process(u, PA_OBJECT(i), FALSE);
 123 }
 124
 125 static pa_hook_result_t source_output_move_finish_cb(pa_core *core, pa_source_output *i, struct userdata *u) {
 126     pa_core_assert_ref(core);
 127     pa_source_output_assert_ref(i);
 128     pa_assert(u);
 129
 130     /* module-filter-apply triggered this move, ignore */
 131     if (pa_proplist_gets(i->proplist, PA_PROP_FILTER_APPLY_MOVING))
 132         return PA_HOOK_OK;
 133
 134     return process(u, PA_OBJECT(i), FALSE);
 135 }
 136
 137 int pa__init(pa_module *m) {
 138     pa_modargs *ma = NULL;
 139     struct userdata *u;
 140
 141     pa_assert(m);
 142
 143     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 144         pa_log("Failed to parse module arguments");
 145         goto fail;
 146     }
 147
 148     m->userdata = u = pa_xnew(struct userdata, 1);
 149
 150     u->core = m->core;
 151
 152     u->sink_input_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], PA_HOOK_LATE-1, (pa_hook_cb_t) sink_input_put_cb, u);
 153     u->sink_input_move_finish_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_FINISH], PA_HOOK_LATE-1, (pa_hook_cb_t) sink_input_move_finish_cb, u);
 154     u->source_output_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], PA_HOOK_LATE-1, (pa_hook_cb_t) source_output_put_cb, u);
 155     u->source_output_move_finish_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FINISH], PA_HOOK_LATE-1, (pa_hook_cb_t) source_output_move_finish_cb, 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
 171 void pa__done(pa_module *m) {
 172     struct userdata* u;
 173
 174     pa_assert(m);
 175
 176     if (!(u = m->userdata))
 177         return;
 178
 179     if (u->sink_input_put_slot)
 180         pa_hook_slot_free(u->sink_input_put_slot);
 181     if (u->sink_input_move_finish_slot)
 182         pa_hook_slot_free(u->sink_input_move_finish_slot);
 183     if (u->source_output_put_slot)
 184         pa_hook_slot_free(u->source_output_put_slot);
 185     if (u->source_output_move_finish_slot)
 186         pa_hook_slot_free(u->source_output_move_finish_slot);
 187
 188     pa_xfree(u);
 189
 190 }