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filter-heuristics: New module that applies some basic heuristics regarding filters.

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At present the only heuristic is one to apply the echo-cancel filter
when dealing with phone streams.
This commit is contained in:
Colin Guthrie 2011-04-14 13:05:45 +02:00
parent 9a2a045d7c
commit 0e60a80afa
2 changed files with 125 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

10
src/Makefile.am
View file

@ -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)

117
src/modules/module-filter-heuristics.c Normal file
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@ -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 <config.h>
#endif
#include <pulsecore/macro.h>
#include <pulsecore/hashmap.h>
#include <pulsecore/hook-list.h>
#include <pulsecore/core.h>
#include <pulsecore/core-util.h>
#include <pulsecore/sink-input.h>
#include <pulsecore/modargs.h>
#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);
}