[pulseaudio-discuss] [PATCH] call-state-tracker: New component.
Maarten Bosmans
mkbosmans at gmail.com
Tue Apr 5 14:57:41 PDT 2011
What are the users of this state tracker? Is it only some out-of-tree
Meego modules? Are you planning to submit those too? At least a
snippet of how it should be used would be nice.
If I read correctly it is a global boolean state tracker that is a
thin wrapper around pa_shared. Is it possible to add the update-hook
capability pa_shared and just use that from the modules. It would
probably mean a couple of lines more in the modules, but the
functionality in pulsecore would be more generic and more widely
usable then.
Maarten
2011/4/5 Tanu Kaskinen <tanu.kaskinen at digia.com>:
> From: Tanu Kaskinen <ext-tanu.kaskinen at nokia.com>
>
> ---
> src/Makefile.am | 1 +
> src/pulsecore/call-state-tracker.c | 127 ++++++++++++++++++++++++++++++++++++
> src/pulsecore/call-state-tracker.h | 54 +++++++++++++++
> 3 files changed, 182 insertions(+), 0 deletions(-)
> create mode 100644 src/pulsecore/call-state-tracker.c
> create mode 100644 src/pulsecore/call-state-tracker.h
>
> diff --git a/src/Makefile.am b/src/Makefile.am
> index bdedded..85c5602 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -835,6 +835,7 @@ libpulsecore_ at PA_MAJORMINOR@_la_SOURCES = \
> pulsecore/asyncmsgq.c pulsecore/asyncmsgq.h \
> pulsecore/asyncq.c pulsecore/asyncq.h \
> pulsecore/auth-cookie.c pulsecore/auth-cookie.h \
> + pulsecore/call-state-tracker.c pulsecore/call-state-tracker.h \
> pulsecore/cli-command.c pulsecore/cli-command.h \
> pulsecore/cli-text.c pulsecore/cli-text.h \
> pulsecore/client.c pulsecore/client.h \
> diff --git a/src/pulsecore/call-state-tracker.c b/src/pulsecore/call-state-tracker.c
> new file mode 100644
> index 0000000..a605685
> --- /dev/null
> +++ b/src/pulsecore/call-state-tracker.c
> @@ -0,0 +1,127 @@
> +/***
> + This file is part of PulseAudio.
> +
> + Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
> +
> + 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/core.h>
> +#include <pulsecore/hook-list.h>
> +#include <pulsecore/log.h>
> +#include <pulsecore/macro.h>
> +#include <pulsecore/refcnt.h>
> +#include <pulsecore/shared.h>
> +
> +#include "call-state-tracker.h"
> +
> +struct pa_call_state_tracker {
> + PA_REFCNT_DECLARE;
> +
> + pa_core *core;
> + pa_bool_t active;
> + pa_hook hooks[PA_CALL_STATE_HOOK_MAX];
> +};
> +
> +static pa_call_state_tracker* call_state_tracker_new(pa_core *c) {
> + pa_call_state_tracker *t;
> + pa_call_state_hook_t h;
> +
> + pa_assert(c);
> +
> + t = pa_xnew0(pa_call_state_tracker, 1);
> + PA_REFCNT_INIT(t);
> + t->core = pa_core_ref(c);
> + t->active = FALSE;
> +
> + for (h = 0; h < PA_CALL_STATE_HOOK_MAX; h++)
> + pa_hook_init(&t->hooks[h], t);
> +
> + pa_assert_se(pa_shared_set(c, "call-state-tracker", t) >= 0);
> +
> + return t;
> +}
> +
> +pa_call_state_tracker *pa_call_state_tracker_get(pa_core *core) {
> + pa_call_state_tracker *t;
> +
> + if ((t = pa_shared_get(core, "call-state-tracker")))
> + return pa_call_state_tracker_ref(t);
> +
> + return call_state_tracker_new(core);
> +}
> +
> +pa_call_state_tracker *pa_call_state_tracker_ref(pa_call_state_tracker *t) {
> + pa_assert(t);
> + pa_assert(PA_REFCNT_VALUE(t) >= 1);
> +
> + PA_REFCNT_INC(t);
> +
> + return t;
> +}
> +
> +void pa_call_state_tracker_unref(pa_call_state_tracker *t) {
> + pa_call_state_hook_t h;
> +
> + pa_assert(t);
> + pa_assert(PA_REFCNT_VALUE(t) >= 1);
> +
> + if (PA_REFCNT_DEC(t) > 0)
> + return;
> +
> + for (h = 0; h < PA_CALL_STATE_HOOK_MAX; h++)
> + pa_hook_done(&t->hooks[h]);
> +
> + pa_assert_se(pa_shared_remove(t->core, "call-state-tracker") >= 0);
> +
> + pa_core_unref(t->core);
> +
> + pa_xfree(t);
> +}
> +
> +pa_bool_t pa_call_state_tracker_get_active(pa_call_state_tracker *t) {
> + pa_assert(t);
> + pa_assert(PA_REFCNT_VALUE(t) >= 1);
> +
> + return t->active;
> +}
> +
> +void pa_call_state_tracker_set_active(pa_call_state_tracker *t, pa_bool_t active) {
> + pa_bool_t changed;
> +
> + pa_assert(t);
> + pa_assert(PA_REFCNT_VALUE(t) >= 1);
> +
> + changed = active != t->active;
> +
> + t->active = active;
> +
> + if (changed)
> + pa_hook_fire(&t->hooks[PA_CALL_STATE_HOOK_CHANGED], (void *) active);
> +
> + pa_log_debug("Call state set %s (%s)", active ? "active" : "inactive", changed ? "changed" : "not changed");
> +}
> +
> +pa_hook *pa_call_state_tracker_hooks(pa_call_state_tracker *t) {
> + pa_assert(t);
> + pa_assert(PA_REFCNT_VALUE(t) >= 1);
> +
> + return t->hooks;
> +}
> diff --git a/src/pulsecore/call-state-tracker.h b/src/pulsecore/call-state-tracker.h
> new file mode 100644
> index 0000000..9a6c60b
> --- /dev/null
> +++ b/src/pulsecore/call-state-tracker.h
> @@ -0,0 +1,54 @@
> +#ifndef foocallstatetrackerhfoo
> +#define foocallstatetrackerhfoo
> +
> +/***
> + This file is part of PulseAudio.
> +
> + Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
> +
> + 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.
> +***/
> +
> +/* This is a shared singleton object, currently used by Meego's voice and
> + * policy enforcement modules. The purpose of the object is just to maintain
> + * a boolean state of "call is active" or "call is not active", and to provide
> + * notification hooks for tracking state changes. So one module will be setting
> + * the state (the voice module) and one or more modules will follow the state
> + * through the hooks (the policy enforcement module). */
> +
> +#include <pulsecore/core.h>
> +#include <pulsecore/hook-list.h>
> +
> +typedef struct pa_call_state_tracker pa_call_state_tracker;
> +
> +/* Hook data: pa_call_state_tracker pointer. */
> +typedef enum pa_call_state_hook {
> + PA_CALL_STATE_HOOK_CHANGED, /* Call data: NULL. */
> + PA_CALL_STATE_HOOK_MAX
> +} pa_call_state_hook_t;
> +
> +pa_call_state_tracker *pa_call_state_tracker_get(pa_core *core);
> +pa_call_state_tracker *pa_call_state_tracker_ref(pa_call_state_tracker *t);
> +void pa_call_state_tracker_unref(pa_call_state_tracker *t);
> +
> +/* If the value has not been explicitly set, returns FALSE. */
> +pa_bool_t pa_call_state_tracker_get_active(pa_call_state_tracker *t);
> +
> +void pa_call_state_tracker_set_active(pa_call_state_tracker *t, pa_bool_t active);
> +
> +pa_hook *pa_call_state_tracker_hooks(pa_call_state_tracker *t);
> +
> +#endif
> --
> 1.7.4.2
>
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