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/*
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* Copyright © 2019 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <signal.h>
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#include <unistd.h>
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#include <string.h>
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#include <libweston/libweston.h>
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#include <libweston/weston-log.h>
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#include "weston-content-protection-server-protocol.h"
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#include "shared/helpers.h"
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#include "shared/timespec-util.h"
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#define content_protection_log(cp, ...) \
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weston_log_scope_printf((cp)->debug, __VA_ARGS__)
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static const char * const content_type_name [] = {
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[WESTON_PROTECTED_SURFACE_TYPE_UNPROTECTED] = "UNPROTECTED",
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[WESTON_PROTECTED_SURFACE_TYPE_HDCP_0] = "TYPE-0",
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[WESTON_PROTECTED_SURFACE_TYPE_HDCP_1] = "TYPE-1",
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};
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void
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weston_protected_surface_send_event(struct protected_surface *psurface,
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enum weston_hdcp_protection protection)
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{
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struct wl_resource *p_resource;
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enum weston_protected_surface_type protection_type;
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struct content_protection *cp;
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struct wl_resource *surface_resource;
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p_resource = psurface->protection_resource;
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if (!p_resource)
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return;
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/* No event to be sent to client, in case of enforced mode */
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if (psurface->surface->protection_mode == WESTON_SURFACE_PROTECTION_MODE_ENFORCED)
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return;
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protection_type = (enum weston_protected_surface_type) protection;
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weston_protected_surface_send_status(p_resource, protection_type);
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cp = psurface->cp_backptr;
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surface_resource = psurface->surface->resource;
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content_protection_log(cp, "wl_surface@%"PRIu32" Protection type set to %s\n",
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wl_resource_get_id(surface_resource),
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content_type_name[protection_type]);
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}
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static void
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set_type(struct wl_client *client, struct wl_resource *resource,
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enum weston_protected_surface_type content_type)
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{
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struct content_protection *cp;
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struct protected_surface *psurface;
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enum weston_hdcp_protection weston_cp;
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struct wl_resource *surface_resource;
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psurface = wl_resource_get_user_data(resource);
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if (!psurface)
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return;
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cp = psurface->cp_backptr;
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surface_resource = psurface->surface->resource;
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if (content_type < WESTON_PROTECTED_SURFACE_TYPE_UNPROTECTED ||
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content_type > WESTON_PROTECTED_SURFACE_TYPE_HDCP_1) {
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wl_resource_post_error(resource,
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WESTON_PROTECTED_SURFACE_ERROR_INVALID_TYPE,
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"wl_surface@%"PRIu32" Invalid content-type %d for request:set_type\n",
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wl_resource_get_id(surface_resource), content_type);
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content_protection_log(cp, "wl_surface@%"PRIu32" Invalid content-type %d for resquest:set_type\n",
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wl_resource_get_id(surface_resource), content_type);
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return;
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}
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content_protection_log(cp, "wl_surface@%"PRIu32" Request: Enable Content-Protection Type: %s\n",
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wl_resource_get_id(surface_resource),
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content_type_name[content_type]);
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weston_cp = (enum weston_hdcp_protection) content_type;
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psurface->surface->pending.desired_protection = weston_cp;
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}
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static void
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protected_surface_destroy(struct wl_client *client, struct wl_resource *resource)
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{
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struct protected_surface *psurface;
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psurface = wl_resource_get_user_data(resource);
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if (!psurface)
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return;
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psurface->surface->pending.desired_protection = WESTON_HDCP_DISABLE;
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}
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static void
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set_enforce_mode(struct wl_client *client, struct wl_resource *resource)
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{
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/*
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* Enforce Censored-Visibility. Compositor censors the protected
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* surface on an unsecured output.
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* In case of a surface, being shown on an unprotected output, the
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* compositor hides the surface, not allowing it to be displayed on
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* the unprotected output, without bothering the client. No difference
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* for the protected outputs.
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*
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* The member 'protection_mode' is "double-buffered", so setting it in
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* pending_state will cause the setting of the corresponding
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* 'protection_mode' in weston_surface, after the commit.
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*
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* This function sets the 'protection_mode' of the weston_surface_state
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* to 'enfoced'. The renderers inspect the flag and compare the
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* desired_protection of the surface, to the current_protection of the
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* output, based on that the real surface or a place-holder content,
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* (e.g. solid color) are shown.
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*/
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struct protected_surface *psurface;
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psurface = wl_resource_get_user_data(resource);
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if (!psurface)
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return;
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psurface->surface->pending.protection_mode =
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WESTON_SURFACE_PROTECTION_MODE_ENFORCED;
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}
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static void
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set_relax_mode(struct wl_client *client, struct wl_resource *resource)
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{
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/*
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* Relaxed mode. By default this mode will be activated.
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* In case of a surface, being shown in unprotected output,
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* compositor just sends the event for protection status changed.
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*
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* On setting the relaxed mode, the 'protection_mode' member is queued
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* to be set to 'relax' from the existing 'enforce' mode.
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*/
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struct protected_surface *psurface;
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psurface = wl_resource_get_user_data(resource);
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if (!psurface)
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return;
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psurface->surface->pending.protection_mode =
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WESTON_SURFACE_PROTECTION_MODE_RELAXED;
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}
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static const struct weston_protected_surface_interface protected_surface_implementation = {
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protected_surface_destroy,
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set_type,
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set_enforce_mode,
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set_relax_mode,
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};
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static void
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cp_destroy_listener(struct wl_listener *listener, void *data)
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{
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struct content_protection *cp;
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cp = container_of(listener, struct content_protection,
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destroy_listener);
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wl_list_remove(&cp->destroy_listener.link);
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wl_list_remove(&cp->protected_list);
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weston_compositor_log_scope_destroy(cp->debug);
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cp->debug = NULL;
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cp->surface_protection_update = NULL;
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free(cp);
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}
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static void
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free_protected_surface(struct protected_surface *psurface)
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{
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psurface->surface->pending.desired_protection = WESTON_HDCP_DISABLE;
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wl_resource_set_user_data(psurface->protection_resource, NULL);
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wl_list_remove(&psurface->surface_destroy_listener.link);
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wl_list_remove(&psurface->link);
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free(psurface);
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}
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static void
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surface_destroyed(struct wl_listener *listener, void *data)
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{
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struct protected_surface *psurface;
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psurface = container_of(listener, struct protected_surface,
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surface_destroy_listener);
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free_protected_surface(psurface);
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}
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static void
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destroy_protected_surface(struct wl_resource *resource)
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{
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struct protected_surface *psurface;
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psurface = wl_resource_get_user_data(resource);
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if (!psurface)
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return;
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free_protected_surface(psurface);
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}
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static void
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get_protection(struct wl_client *client, struct wl_resource *cp_resource,
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uint32_t id, struct wl_resource *surface_resource)
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{
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struct wl_resource *resource;
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struct weston_surface *surface;
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struct content_protection *cp;
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struct protected_surface *psurface;
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struct wl_listener *listener;
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surface = wl_resource_get_user_data(surface_resource);
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assert(surface);
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cp = wl_resource_get_user_data(cp_resource);
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assert(cp);
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/*
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* Check if this client has a corresponding protected-surface
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*/
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listener = wl_resource_get_destroy_listener(surface->resource,
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surface_destroyed);
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if (listener) {
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wl_resource_post_error(cp_resource,
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WESTON_CONTENT_PROTECTION_ERROR_SURFACE_EXISTS,
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"wl_surface@%"PRIu32" Protection already exists",
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wl_resource_get_id(surface_resource));
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return;
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}
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psurface = zalloc(sizeof(struct protected_surface));
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if (!psurface) {
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wl_client_post_no_memory(client);
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return;
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}
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psurface->cp_backptr = cp;
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resource = wl_resource_create(client, &weston_protected_surface_interface,
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1, id);
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if (!resource) {
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free(psurface);
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wl_client_post_no_memory(client);
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return;
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}
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wl_list_insert(&cp->protected_list, &psurface->link);
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wl_resource_set_implementation(resource, &protected_surface_implementation,
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psurface,
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destroy_protected_surface);
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psurface->protection_resource = resource;
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psurface->surface = surface;
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psurface->surface_destroy_listener.notify = surface_destroyed;
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wl_resource_add_destroy_listener(surface->resource,
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&psurface->surface_destroy_listener);
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weston_protected_surface_send_event(psurface,
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psurface->surface->current_protection);
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}
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static void
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destroy_protection(struct wl_client *client, struct wl_resource *cp_resource)
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{
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wl_resource_destroy(cp_resource);
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}
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static const
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struct weston_content_protection_interface content_protection_implementation = {
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destroy_protection,
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get_protection,
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};
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static void
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bind_weston_content_protection(struct wl_client *client, void *data,
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uint32_t version, uint32_t id)
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{
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struct content_protection *cp = data;
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struct wl_resource *resource;
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resource = wl_resource_create(client,
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&weston_content_protection_interface,
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1, id);
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if (!resource) {
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wl_client_post_no_memory(client);
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return;
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}
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wl_resource_set_implementation(resource,
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&content_protection_implementation,
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cp, NULL);
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}
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/* Advertise the content-protection support.
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*
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* Calling this function sets up the content-protection support via HDCP.
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* This exposes the global interface, visible to the client, enabling them to
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* request for content-protection for their surfaces according to the type of
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* content.
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*/
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WL_EXPORT int
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weston_compositor_enable_content_protection(struct weston_compositor *compositor)
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{
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struct content_protection *cp;
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cp = zalloc(sizeof(*cp));
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if (cp == NULL)
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return -1;
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cp->compositor = compositor;
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compositor->content_protection = cp;
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wl_list_init(&cp->protected_list);
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if (wl_global_create(compositor->wl_display,
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&weston_content_protection_interface, 1, cp,
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bind_weston_content_protection) == NULL)
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return -1;
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cp->destroy_listener.notify = cp_destroy_listener;
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wl_signal_add(&compositor->destroy_signal, &cp->destroy_listener);
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cp->debug = weston_log_ctx_add_log_scope(compositor->weston_log_ctx,
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"content-protection-debug",
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"debug-logs for content-protection",
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NULL, NULL, NULL);
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return 0;
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}
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