pipewire/src/modules/module-client-device/proxy-device.c

/* 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.
 */

#include <stdio.h>
#include <unistd.h>
#include <errno.h>

#include <spa/pod/parser.h>
#include <spa/monitor/device.h>

#include "pipewire/pipewire.h"
#include "pipewire/private.h"

struct device_data {
	struct pw_remote *remote;
	struct pw_core *core;

	struct spa_device *device;
	struct spa_hook device_listener;
	struct spa_hook device_methods;

        struct pw_proxy *proxy;
	struct spa_hook proxy_listener;
};

#define pw_device_proxy_event(o,method,version,...)			\
({									\
        int _res = -ENOTSUP;						\
        struct spa_interface *_p = o;                                   \
        spa_interface_call_res(&_p->iface,                              \
                        struct pw_core_proxy_methods, _res,             \
                        method, version, ##__VA_ARGS__);                \
        _res;                                                           \
})

static void device_event_info(void *_data, const struct spa_device_info *info)
{
	struct device_data *data = _data;
	struct spa_interface *iface = (struct spa_interface*)data->proxy;
	pw_log_debug("%p", data);
        spa_interface_call(iface, struct spa_device_events, info, 0, info);
}

static void device_event_result(void *_data, int seq, int res, uint32_t type, const void *result)
{
	struct device_data *data = _data;
	struct spa_interface *iface = (struct spa_interface*)data->proxy;
	pw_log_debug("%p", data);
        spa_interface_call(iface, struct spa_device_events, result, 0, seq, res, type, result);
}

static void device_event_event(void *_data, const struct spa_event *event)
{
	struct device_data *data = _data;
	struct spa_interface *iface = (struct spa_interface*)data->proxy;
	pw_log_debug("%p", data);
        spa_interface_call(iface, struct spa_device_events, event, 0, event);
}

static void device_event_object_info(void *_data, uint32_t id,
                const struct spa_device_object_info *info)
{
	struct device_data *data = _data;
	struct spa_interface *iface = (struct spa_interface*)data->proxy;
	pw_log_debug("%p", data);
        spa_interface_call(iface, struct spa_device_events, object_info, 0, id, info);
}

static const struct spa_device_events device_events = {
	SPA_VERSION_DEVICE_EVENTS,
	.info = device_event_info,
	.result = device_event_result,
	.event = device_event_event,
	.object_info = device_event_object_info,
};

static int device_method_enum_params(void *object, int seq,
                            uint32_t id, uint32_t index, uint32_t max,
                            const struct spa_pod *filter)
{
	struct device_data *data = object;
	pw_log_debug("%p", data);
	return spa_device_enum_params(data->device, seq, id, index, max, filter);
}

static int device_method_set_param(void *object,
                          uint32_t id, uint32_t flags,
                          const struct spa_pod *param)
{
	struct device_data *data = object;
	pw_log_debug("%p", data);
	return spa_device_set_param(data->device, id, flags, param);
}

static const struct spa_device_methods device_methods = {
	SPA_VERSION_DEVICE_METHODS,
	.enum_params = device_method_enum_params,
	.set_param = device_method_set_param,
};

static void device_proxy_destroy(void *_data)
{
	struct device_data *data = _data;
	spa_hook_remove(&data->device_listener);
}

static const struct pw_proxy_events proxy_events = {
	PW_VERSION_PROXY_EVENTS,
	.destroy = device_proxy_destroy,
};

struct pw_proxy *pw_remote_spa_device_export(struct pw_remote *remote,
		uint32_t type, struct pw_properties *props, void *object)
{
	struct spa_device *device = object;
	struct pw_proxy *proxy;
	struct device_data *data;

	proxy = pw_core_proxy_create_object(remote->core_proxy,
					    "client-device",
					    SPA_TYPE_INTERFACE_Device,
					    SPA_VERSION_DEVICE,
					    &props->dict,
					    sizeof(struct device_data));
        if (proxy == NULL)
                return NULL;

	data = pw_proxy_get_user_data(proxy);
	data->remote = remote;
	data->device = device;
	data->core = pw_remote_get_core(remote);
	data->proxy = proxy;

	pw_proxy_add_listener(proxy, &data->proxy_listener, &proxy_events, data);
	pw_proxy_add_proxy_listener(proxy, &data->device_methods, &device_methods, data);
	spa_device_add_listener(device, &data->device_listener, &device_events, data);

	return proxy;
}