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authorColin Guthrie <colin@mageia.org>2011-04-14 13:05:45 +0200
committerColin Guthrie <colin@mageia.org>2011-04-18 10:31:51 +0200
commit0e60a80afae49fbde327388be485f7f5691828b8 (patch)
tree65b7bd15465a8e6647c1fa5f0424a62bc19b9b05 /src
parent9a2a045d7c74ecc3c3471252b2cecb64f96e654d (diff)
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.
Diffstat (limited to 'src')
-rw-r--r--src/Makefile.am10
-rw-r--r--src/modules/module-filter-heuristics.c117
2 files changed, 125 insertions, 2 deletions
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 <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);
+
+}