From 0e60a80afae49fbde327388be485f7f5691828b8 Mon Sep 17 00:00:00 2001 From: Colin Guthrie Date: Thu, 14 Apr 2011 13:05:45 +0200 Subject: filter-heuristics: New module that applies some basic heuristics regarding filters. At present the only heuristic is one to apply the echo-cancel filter when dealing with phone streams. --- src/Makefile.am | 10 ++- src/modules/module-filter-heuristics.c | 117 +++++++++++++++++++++++++++++++++ 2 files changed, 125 insertions(+), 2 deletions(-) create mode 100644 src/modules/module-filter-heuristics.c (limited to 'src') diff --git a/src/Makefile.am b/src/Makefile.am index b9e24b15..cfa2e1fc 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1053,7 +1053,8 @@ modlibexec_LTLIBRARIES += \ module-virtual-sink.la \ module-virtual-source.la \ module-switch-on-connect.la \ - module-filter-apply.la + module-filter-apply.la \ + module-filter-heuristics.la # See comment at librtp.la above if !OS_IS_WIN32 @@ -1342,7 +1343,8 @@ SYMDEF_FILES = \ module-virtual-sink-symdef.h \ module-virtual-source-symdef.h \ module-switch-on-connect-symdef.h \ - module-filter-apply-symdef.h + module-filter-apply-symdef.h \ + module-filter-heuristics-symdef.h EXTRA_DIST += $(SYMDEF_FILES) BUILT_SOURCES += $(SYMDEF_FILES) builddirs @@ -1492,6 +1494,10 @@ module_filter_apply_la_SOURCES = modules/module-filter-apply.c module_filter_apply_la_LDFLAGS = $(MODULE_LDFLAGS) module_filter_apply_la_LIBADD = $(MODULE_LIBADD) +module_filter_heuristics_la_SOURCES = modules/module-filter-heuristics.c +module_filter_heuristics_la_LDFLAGS = $(MODULE_LDFLAGS) +module_filter_heuristics_la_LIBADD = $(MODULE_LIBADD) + module_remap_sink_la_SOURCES = modules/module-remap-sink.c module_remap_sink_la_LDFLAGS = $(MODULE_LDFLAGS) module_remap_sink_la_LIBADD = $(MODULE_LIBADD) diff --git a/src/modules/module-filter-heuristics.c b/src/modules/module-filter-heuristics.c new file mode 100644 index 00000000..fb01f85a --- /dev/null +++ b/src/modules/module-filter-heuristics.c @@ -0,0 +1,117 @@ +/*** + This file is part of PulseAudio. + + Copyright 2011 Colin Guthrie + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of the License, + or (at your option) any later version. + + PulseAudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include +#include +#include +#include +#include +#include + +#include "module-filter-heuristics-symdef.h" + +#define PA_PROP_FILTER_WANT "filter.want" +#define PA_PROP_FILTER_SUPPRESS "filter.suppress" + + +PA_MODULE_AUTHOR("Colin Guthrie"); +PA_MODULE_DESCRIPTION("Detect when various filters are desirable"); +PA_MODULE_VERSION(PACKAGE_VERSION); +PA_MODULE_LOAD_ONCE(TRUE); + +static const char* const valid_modargs[] = { + NULL +}; + +struct userdata { + pa_core *core; + pa_hook_slot + *sink_input_put_slot; +}; + +static pa_hook_result_t sink_input_put_cb(pa_core *core, pa_sink_input *i, struct userdata *u) { + const char *role; + + pa_core_assert_ref(core); + pa_sink_input_assert_ref(i); + pa_assert(u); + + /* If the stream already specifies what it wants, then let it be. */ + if (pa_proplist_gets(i->proplist, PA_PROP_FILTER_WANT)) + return PA_HOOK_OK; + + if ((role = pa_proplist_gets(i->proplist, PA_PROP_MEDIA_ROLE)) && pa_streq(role, "phone")) + pa_proplist_sets(i->proplist, PA_PROP_FILTER_WANT, "echo-cancel"); + + return PA_HOOK_OK; +} + +int pa__init(pa_module *m) { + pa_modargs *ma = NULL; + struct userdata *u; + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments"); + goto fail; + } + + m->userdata = u = pa_xnew(struct userdata, 1); + + u->core = m->core; + + 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); + + pa_modargs_free(ma); + + return 0; + +fail: + pa__done(m); + + if (ma) + pa_modargs_free(ma); + + return -1; + + +} + +void pa__done(pa_module *m) { + struct userdata* u; + + pa_assert(m); + + if (!(u = m->userdata)) + return; + + if (u->sink_input_put_slot) + pa_hook_slot_free(u->sink_input_put_slot); + + pa_xfree(u); + +} -- cgit