mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-10-31 22:25:33 -04:00
filter-apply: New module to automatically load filter sinks (and move streams) based on sink-input property hints.
This module does not yet deal with modules that need matched inputs/outputs (i.e. echo-cancel) but this will be added in due course.
This commit is contained in:
Colin Guthrie
parent
34658927a3
commit
9a2a045d7c
2 changed files with 408 additions and 2 deletions
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@ -1052,7 +1052,8 @@ modlibexec_LTLIBRARIES += \
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module-loopback.la \
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module-virtual-sink.la \
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module-virtual-source.la \
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module-switch-on-connect.la
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module-switch-on-connect.la \
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module-filter-apply.la
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# See comment at librtp.la above
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if !OS_IS_WIN32
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@ -1340,7 +1341,8 @@ SYMDEF_FILES = \
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module-loopback-symdef.h \
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module-virtual-sink-symdef.h \
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module-virtual-source-symdef.h \
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module-switch-on-connect-symdef.h
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module-switch-on-connect-symdef.h \
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module-filter-apply-symdef.h
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EXTRA_DIST += $(SYMDEF_FILES)
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BUILT_SOURCES += $(SYMDEF_FILES) builddirs
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@ -1486,6 +1488,10 @@ module_switch_on_connect_la_SOURCES = modules/module-switch-on-connect.c
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module_switch_on_connect_la_LDFLAGS = $(MODULE_LDFLAGS)
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module_switch_on_connect_la_LIBADD = $(MODULE_LIBADD)
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module_filter_apply_la_SOURCES = modules/module-filter-apply.c
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module_filter_apply_la_LDFLAGS = $(MODULE_LDFLAGS)
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module_filter_apply_la_LIBADD = $(MODULE_LIBADD)
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module_remap_sink_la_SOURCES = modules/module-remap-sink.c
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module_remap_sink_la_LDFLAGS = $(MODULE_LDFLAGS)
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module_remap_sink_la_LIBADD = $(MODULE_LIBADD)
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400
src/modules/module-filter-apply.c
Normal file
400
src/modules/module-filter-apply.c
Normal file
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@ -0,0 +1,400 @@
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/***
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This file is part of PulseAudio.
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Copyright 2011 Colin Guthrie
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulse/timeval.h>
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#include <pulse/rtclock.h>
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#include <pulsecore/macro.h>
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#include <pulsecore/hashmap.h>
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#include <pulsecore/hook-list.h>
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#include <pulsecore/core.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/sink-input.h>
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#include <pulsecore/modargs.h>
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#include "module-filter-apply-symdef.h"
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#define PA_PROP_FILTER_WANT "filter.want"
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#define PA_PROP_FILTER_SUPPRESS "filter.suppress"
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PA_MODULE_AUTHOR("Colin Guthrie");
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PA_MODULE_DESCRIPTION("Load filter sinks automatically when needed");
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PA_MODULE_VERSION(PACKAGE_VERSION);
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PA_MODULE_LOAD_ONCE(TRUE);
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static const char* const valid_modargs[] = {
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NULL
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};
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#define HOUSEKEEPING_INTERVAL (10 * PA_USEC_PER_SEC)
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struct filter {
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char *name;
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pa_sink* parent_sink;
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uint32_t module_index;
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pa_sink* sink;
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};
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struct userdata {
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pa_core *core;
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pa_hashmap *filters;
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pa_hook_slot
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*sink_input_put_slot,
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*sink_input_proplist_slot,
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*sink_input_unlink_slot,
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*sink_unlink_slot;
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pa_time_event *housekeeping_time_event;
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};
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static unsigned filter_hash(const void *p) {
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const struct filter *f = p;
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return
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(unsigned) f->parent_sink->index +
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pa_idxset_string_hash_func(f->name);
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}
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static int filter_compare(const void *a, const void *b) {
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const struct filter *fa = a, *fb = b;
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int r;
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if (fa->parent_sink != fb->parent_sink)
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return 1;
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if ((r = strcmp(fa->name, fb->name)))
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return r;
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return 0;
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}
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static struct filter *filter_new(const char *name, pa_sink* parent_sink) {
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struct filter *f;
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f = pa_xnew(struct filter, 1);
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f->name = pa_xstrdup(name);
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pa_assert_se(f->parent_sink = parent_sink);
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f->module_index = PA_INVALID_INDEX;
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f->sink = NULL;
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return f;
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}
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static void filter_free(struct filter *f) {
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pa_assert(f);
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pa_xfree(f->name);
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pa_xfree(f);
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}
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static const char* should_filter(pa_sink_input *i) {
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const char *want;
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/* If the stream doesn't what any filter, then let it be. */
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if ((want = pa_proplist_gets(i->proplist, PA_PROP_FILTER_WANT)) && !pa_streq(want, "")) {
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const char* suppress = pa_proplist_gets(i->proplist, PA_PROP_FILTER_SUPPRESS);
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if (!suppress || !pa_streq(suppress, want))
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return want;
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}
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return NULL;
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}
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static void housekeeping_time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *t, void *userdata) {
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struct userdata *u = userdata;
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struct filter *filter;
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void *state;
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pa_assert(a);
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pa_assert(e);
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pa_assert(u);
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pa_assert(e == u->housekeeping_time_event);
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u->core->mainloop->time_free(u->housekeeping_time_event);
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u->housekeeping_time_event = NULL;
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PA_HASHMAP_FOREACH(filter, u->filters, state) {
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if (filter->sink && pa_idxset_size(filter->sink->inputs) == 0) {
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uint32_t idx;
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pa_log_debug("Detected filter %s as no longer used on sink %s. Unloading.", filter->name, filter->sink->name);
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idx = filter->module_index;
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pa_hashmap_remove(u->filters, filter);
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filter_free(filter);
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pa_module_unload_request_by_index(u->core, idx, TRUE);
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}
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}
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pa_log_info("Housekeeping Done.");
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}
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static void trigger_housekeeping(struct userdata *u) {
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pa_assert(u);
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if (u->housekeeping_time_event)
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return;
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u->housekeeping_time_event = pa_core_rttime_new(u->core, pa_rtclock_now() + HOUSEKEEPING_INTERVAL, housekeeping_time_callback, u);
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}
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static void move_input_for_filter(pa_sink_input *i, struct filter* filter, pa_bool_t restore) {
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pa_sink *sink;
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pa_assert(i);
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pa_assert(filter);
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pa_assert_se(sink = (restore ? filter->parent_sink : filter->sink));
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if (pa_sink_input_move_to(i, sink, FALSE) < 0)
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pa_log_info("Failed to move sink input %u \"%s\" to <%s>.", i->index,
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pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), sink->name);
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else
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pa_log_info("Sucessfully moved sink input %u \"%s\" to <%s>.", i->index,
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pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), sink->name);
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}
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static pa_hook_result_t process(struct userdata *u, pa_sink_input *i) {
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const char *want;
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pa_bool_t done_something = FALSE;
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pa_assert(u);
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pa_sink_input_assert_ref(i);
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/* If there is no sink yet, we can't do much */
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if (!i->sink)
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return PA_HOOK_OK;
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/* If the stream doesn't what any filter, then let it be. */
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if ((want = should_filter(i))) {
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char *module_name;
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struct filter *fltr, *filter;
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/* We need to ensure the SI is playing on a sink of this type
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* attached to the sink it's "officially" playing on */
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if (!i->sink->module)
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return PA_HOOK_OK;
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module_name = pa_sprintf_malloc("module-%s", want);
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if (pa_streq(i->sink->module->name, module_name)) {
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pa_log_debug("Stream appears to be playing on an appropriate sink already. Ignoring.");
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pa_xfree(module_name);
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return PA_HOOK_OK;
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}
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fltr = filter_new(want, i->sink);
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if (!(filter = pa_hashmap_get(u->filters, fltr))) {
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char *args;
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pa_module *m;
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args = pa_sprintf_malloc("sink_master=%s", i->sink->name);
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pa_log_debug("Loading %s with arguments '%s'", module_name, args);
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if ((m = pa_module_load(u->core, module_name, args))) {
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uint32_t idx;
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pa_sink *sink;
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fltr->module_index = m->index;
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/* We cannot use the SINK_PUT hook here to detect our sink as it'll
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* be called during the module load so we wont yet have put the filter
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* in our hashmap to compare... so we have to search for it */
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PA_IDXSET_FOREACH(sink, u->core->sinks, idx) {
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if (sink->module == m) {
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fltr->sink = sink;
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break;
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}
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}
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pa_hashmap_put(u->filters, fltr, fltr);
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filter = fltr;
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fltr = NULL;
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done_something = TRUE;
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}
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pa_xfree(args);
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}
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pa_xfree(fltr);
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if (!filter) {
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pa_log("Unable to load %s for sink <%s>", module_name, i->sink->name);
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pa_xfree(module_name);
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return PA_HOOK_OK;
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}
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pa_xfree(module_name);
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if (filter->sink) {
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/* We can move the sink_input now as the know the destination.
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* If this isn't true, we will do it later when the sink appears. */
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move_input_for_filter(i, filter, FALSE);
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done_something = TRUE;
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}
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} else {
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void *state;
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struct filter *filter = NULL;
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/* We do not want to filter... but are we already filtered?
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* This can happen if an input's proplist changes */
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PA_HASHMAP_FOREACH(filter, u->filters, state) {
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if (i->sink == filter->sink) {
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move_input_for_filter(i, filter, TRUE);
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done_something = TRUE;
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break;
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}
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}
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}
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if (done_something)
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trigger_housekeeping(u);
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return PA_HOOK_OK;
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}
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static pa_hook_result_t sink_input_put_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
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pa_core_assert_ref(core);
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pa_sink_input_assert_ref(i);
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return process(u, i);
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}
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static pa_hook_result_t sink_input_proplist_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
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pa_core_assert_ref(core);
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pa_sink_input_assert_ref(i);
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return process(u, i);
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}
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static pa_hook_result_t sink_input_unlink_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
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pa_core_assert_ref(core);
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pa_sink_input_assert_ref(i);
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pa_assert(u);
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if (pa_hashmap_size(u->filters) > 0)
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trigger_housekeeping(u);
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return PA_HOOK_OK;
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}
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static pa_hook_result_t sink_unlink_cb(pa_core *core, pa_sink *sink, struct userdata *u) {
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void *state;
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struct filter *filter = NULL;
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pa_core_assert_ref(core);
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pa_sink_assert_ref(sink);
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pa_assert(u);
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/* If either the parent or the sink we've loaded disappears,
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* we should remove it from our hashmap */
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PA_HASHMAP_FOREACH(filter, u->filters, state) {
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if (filter->parent_sink == sink || filter->sink == sink) {
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uint32_t idx;
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/* Attempt to rescue any streams to the parent sink as this is likely
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* the best course of action (as opposed to a generic rescue via
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* module-rescue-streams */
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if (filter->sink == sink) {
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pa_sink_input *i;
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PA_IDXSET_FOREACH(i, sink->inputs, idx)
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move_input_for_filter(i, filter, TRUE);
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}
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idx = filter->module_index;
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pa_hashmap_remove(u->filters, filter);
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filter_free(filter);
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pa_module_unload_request_by_index(u->core, idx, TRUE);
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}
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}
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return PA_HOOK_OK;
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}
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int pa__init(pa_module *m) {
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pa_modargs *ma = NULL;
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struct userdata *u;
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pa_assert(m);
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if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
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pa_log("Failed to parse module arguments");
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goto fail;
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}
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m->userdata = u = pa_xnew0(struct userdata, 1);
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u->core = m->core;
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u->filters = pa_hashmap_new(filter_hash, filter_compare);
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u->sink_input_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_put_cb, u);
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u->sink_input_proplist_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_proplist_cb, u);
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u->sink_input_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_unlink_cb, u);
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u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) sink_unlink_cb, u);
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pa_modargs_free(ma);
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return 0;
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fail:
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pa__done(m);
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if (ma)
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pa_modargs_free(ma);
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return -1;
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}
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void pa__done(pa_module *m) {
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struct userdata* u;
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pa_assert(m);
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if (!(u = m->userdata))
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return;
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if (u->sink_input_put_slot)
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pa_hook_slot_free(u->sink_input_put_slot);
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if (u->sink_input_proplist_slot)
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pa_hook_slot_free(u->sink_input_proplist_slot);
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if (u->sink_input_unlink_slot)
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pa_hook_slot_free(u->sink_input_unlink_slot);
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if (u->sink_unlink_slot)
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pa_hook_slot_free(u->sink_unlink_slot);
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if (u->housekeeping_time_event)
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u->core->mainloop->time_free(u->housekeeping_time_event);
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if (u->filters) {
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struct filter *f;
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while ((f = pa_hashmap_steal_first(u->filters))) {
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pa_module_unload_request_by_index(u->core, f->module_index, TRUE);
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filter_free(f);
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}
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pa_hashmap_free(u->filters, NULL, NULL);
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}
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pa_xfree(u);
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}
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