peer-utils.h

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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2023 Wim Taymans */
/* SPDX-License-Identifier: MIT */
 
#ifndef SPA_PARAM_PEER_PARAM_UTILS_H
#define SPA_PARAM_PEER_PARAM_UTILS_H
 
#include <float.h>
 
#include <spa/utils/dict.h>
#include <spa/pod/builder.h>
#include <spa/pod/iter.h>
#include <spa/pod/parser.h>
#include <spa/pod/compare.h>
#include <spa/param/peer.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifndef SPA_API_PEER_PARAM_UTILS
 #ifdef SPA_API_IMPL
  #define SPA_API_PEER_PARAM_UTILS SPA_API_IMPL
 #else
  #define SPA_API_PEER_PARAM_UTILS static inline
 #endif
#endif
 
SPA_API_PEER_PARAM_UTILS int
spa_peer_param_parse(const struct spa_pod *param, struct spa_peer_param_info *info,
                size_t size, void **state)
{
        int res;
        const struct spa_pod_object *obj = (const struct spa_pod_object*)param;
        const struct spa_pod_prop *first, *start, *cur;
 
        if ((res = spa_pod_parse_object(param,
                        SPA_TYPE_OBJECT_PeerParam, NULL)) < 0)
                return res;
 
        first = spa_pod_prop_first(&obj->body);
        start = *state ? spa_pod_prop_next((struct spa_pod_prop*)*state) : first;
 
        res = 0;
        for (cur = start; spa_pod_prop_is_inside(&obj->body, obj->pod.size, cur);
             cur = spa_pod_prop_next(cur)) {
                info->peer_id = cur->key;
                info->param = &cur->value;
                *state = (void*)cur;
                return 1;
        }
        return 0;
}
 
 
SPA_API_PEER_PARAM_UTILS void
spa_peer_param_build_start(struct spa_pod_builder *builder, struct spa_pod_frame *f, uint32_t id)
{
        spa_pod_builder_push_object(builder, f, SPA_TYPE_OBJECT_PeerParam, id);
}
 
SPA_API_PEER_PARAM_UTILS void
spa_peer_param_build_add_param(struct spa_pod_builder *builder, uint32_t peer_id,
                const struct spa_pod *param)
{
        spa_pod_builder_prop(builder, peer_id, 0);
        if (param)
                spa_pod_builder_primitive(builder, param);
        else
                spa_pod_builder_none(builder);
}
 
SPA_API_PEER_PARAM_UTILS struct spa_pod *
spa_peer_param_build_end(struct spa_pod_builder *builder, struct spa_pod_frame *f)
{
        return (struct spa_pod*)spa_pod_builder_pop(builder, f);
}
 
#ifdef __cplusplus
}  /* extern "C" */
#endif
 
#endif /* SPA_PARAM_PEER_PARAM_UTILS_H */