PipeWire  0.3.49
bluez-session.c

doc} bluez-session.c title
doc} bluez-session.c doc

/* PipeWire
*
* Copyright © 2019 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
[title]
Using the \ref spa_device "SPA Device API", among other things.
[title]
*/
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <math.h>
#include <time.h>
#include "config.h"
#include <spa/node/node.h>
#include <spa/utils/hook.h>
#include <spa/debug/dict.h>
#define NAME "bluez-session"
struct impl;
struct object;
struct node {
struct impl *impl;
struct object *object;
struct spa_list link;
uint32_t id;
struct spa_handle *handle;
struct pw_proxy *proxy;
struct spa_node *node;
};
struct object {
struct impl *impl;
struct spa_list link;
uint32_t id;
struct spa_handle *handle;
struct pw_proxy *proxy;
struct spa_device *device;
struct spa_hook listener;
struct spa_list node_list;
};
struct impl {
struct timespec now;
struct pw_main_loop *loop;
struct pw_context *context;
struct pw_core *core;
struct spa_hook core_listener;
struct spa_handle *handle;
struct spa_device *device;
struct spa_hook listener;
struct spa_list device_list;
};
static struct node *find_node(struct object *obj, uint32_t id)
{
struct node *node;
spa_list_for_each(node, &obj->node_list, link) {
if (node->id == id)
return node;
}
return NULL;
}
static void update_node(struct object *obj, struct node *node,
const struct spa_device_object_info *info)
{
pw_log_debug("update node %u", node->id);
spa_debug_dict(0, info->props);
}
static struct node *create_node(struct object *obj, uint32_t id,
const struct spa_device_object_info *info)
{
struct node *node;
struct impl *impl = obj->impl;
struct pw_context *context = impl->context;
struct spa_handle *handle;
int res;
void *iface;
pw_log_debug("new node %u", id);
return NULL;
handle = pw_context_load_spa_handle(context,
info->factory_name,
info->props);
if (handle == NULL) {
pw_log_error("can't make factory instance: %m");
goto exit;
}
if ((res = spa_handle_get_interface(handle, info->type, &iface)) < 0) {
pw_log_error("can't get %s interface: %s", info->type, spa_strerror(res));
goto unload_handle;
}
node = calloc(1, sizeof(*node));
if (node == NULL)
goto unload_handle;
node->impl = impl;
node->object = obj;
node->id = id;
node->handle = handle;
node->node = iface;
node->proxy = pw_core_export(impl->core,
info->type, info->props, node->node, 0);
if (node->proxy == NULL)
goto clean_node;
spa_list_append(&obj->node_list, &node->link);
update_node(obj, node, info);
return node;
clean_node:
free(node);
unload_handle:
exit:
return NULL;
}
static void remove_node(struct object *obj, struct node *node)
{
pw_log_debug("remove node %u", node->id);
spa_list_remove(&node->link);
pw_proxy_destroy(node->proxy);
free(node->handle);
free(node);
}
static void device_object_info(void *data, uint32_t id,
const struct spa_device_object_info *info)
{
struct object *obj = data;
struct node *node;
node = find_node(obj, id);
if (info == NULL) {
if (node == NULL) {
pw_log_warn("object %p: unknown node %u", obj, id);
return;
}
remove_node(obj, node);
} else if (node == NULL) {
create_node(obj, id, info);
} else {
update_node(obj, node, info);
}
}
static const struct spa_device_events device_events = {
.object_info = device_object_info
};
static struct object *find_object(struct impl *impl, uint32_t id)
{
struct object *obj;
spa_list_for_each(obj, &impl->device_list, link) {
if (obj->id == id)
return obj;
}
return NULL;
}
static void update_object(struct impl *impl, struct object *obj,
const struct spa_device_object_info *info)
{
pw_log_debug("update object %u", obj->id);
spa_debug_dict(0, info->props);
}
static struct object *create_object(struct impl *impl, uint32_t id,
const struct spa_device_object_info *info)
{
struct pw_context *context = impl->context;
struct object *obj;
struct spa_handle *handle;
int res;
void *iface;
pw_log_debug("new object %u", id);
return NULL;
handle = pw_context_load_spa_handle(context,
info->factory_name,
info->props);
if (handle == NULL) {
pw_log_error("can't make factory instance: %m");
goto exit;
}
if ((res = spa_handle_get_interface(handle, info->type, &iface)) < 0) {
pw_log_error("can't get %s interface: %s", info->type, spa_strerror(res));
goto unload_handle;
}
obj = calloc(1, sizeof(*obj));
if (obj == NULL)
goto unload_handle;
obj->impl = impl;
obj->id = id;
obj->handle = handle;
obj->device = iface;
obj->proxy = pw_core_export(impl->core,
info->type, info->props, obj->device, 0);
if (obj->proxy == NULL)
goto clean_object;
spa_list_init(&obj->node_list);
&obj->listener, &device_events, obj);
spa_list_append(&impl->device_list, &obj->link);
update_object(impl, obj, info);
return obj;
clean_object:
free(obj);
unload_handle:
exit:
return NULL;
}
static void remove_object(struct impl *impl, struct object *obj)
{
pw_log_debug("remove object %u", obj->id);
spa_list_remove(&obj->link);
spa_hook_remove(&obj->listener);
pw_proxy_destroy(obj->proxy);
free(obj->handle);
free(obj);
}
static void dbus_device_object_info(void *data, uint32_t id,
const struct spa_device_object_info *info)
{
struct impl *impl = data;
struct object *obj;
obj = find_object(impl, id);
if (info == NULL) {
if (obj == NULL)
return;
remove_object(impl, obj);
} else if (obj == NULL) {
if (create_object(impl, id, info) == NULL)
return;
} else {
update_object(impl, obj, info);
}
}
static const struct spa_device_events dbus_device_events =
{
.object_info = dbus_device_object_info,
};
static int start_monitor(struct impl *impl)
{
struct spa_handle *handle;
int res;
void *iface;
if (handle == NULL) {
res = -errno;
goto out;
}
if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Device, &iface)) < 0) {
pw_log_error("can't get MONITOR interface: %d", res);
goto out_unload;
}
impl->handle = handle;
impl->device = iface;
spa_device_add_listener(impl->device, &impl->listener, &dbus_device_events, impl);
return 0;
out_unload:
out:
return res;
}
static void on_core_error(void *data, uint32_t id, int seq, int res, const char *message)
{
struct impl *impl = data;
pw_log_error("error id:%u seq:%d res:%d (%s): %s",
id, seq, res, spa_strerror(res), message);
if (id == PW_ID_CORE && res == -EPIPE)
pw_main_loop_quit(impl->loop);
}
static const struct pw_core_events core_events = {
.error = on_core_error,
};
int main(int argc, char *argv[])
{
struct impl impl = { 0, };
int res;
pw_init(&argc, &argv);
impl.loop = pw_main_loop_new(NULL);
impl.context = pw_context_new(pw_main_loop_get_loop(impl.loop), NULL, 0);
clock_gettime(CLOCK_MONOTONIC, &impl.now);
spa_list_init(&impl.device_list);
impl.core = pw_context_connect(impl.context, NULL, 0);
if (impl.core == NULL) {
pw_log_error(NAME" %p: can't connect %m", &impl);
return -1;
}
&impl.core_listener,
&core_events, &impl);
if ((res = start_monitor(&impl)) < 0) {
pw_log_error(NAME" %p: error starting monitor: %s", &impl, spa_strerror(res));
return -1;
}
pw_main_loop_run(impl.loop);
pw_context_destroy(impl.context);
return 0;
}