mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2026-03-20 05:33:55 -04:00
941fc5f51c
Add a new SPA_TYPE_OBJECT_ParamDict object that contains a struct with key/value pairs. We're using something similar for Tags but this is a more generic version. Make a new Capability param that uses the ParamDict object. This is meant to be used to describe capabilities with the generic key/value struct. Make a new PeerParam object where the keys are generic ids of the peer objects and the values any Pod. The idea is to use this object to store a peer objects. Make some helpers to iterate the peers and their objects. Add a new PeerCapability param that uses the PeerParam object with Capability objects. This can be used to send the collection of Capabilities from all peers to a port. This is a bit like the tags but in a more generic way. The tags could also be implemented in this new generic way later. Make the PeerFormats use the same PeerParam of Format objects. The Capability param is set on ports. impl-link will collect all Capability objects into a PeerCapability object and send this to the peer. The difference with the Tag param is that these Capability params are not in any way forwared on the node automatically (like what is done in the loopback module) because they represent the capabilities of the ports betweem the link.
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/* Simple Plugin API */
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/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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#ifndef SPA_POD_DYNAMIC_H
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#define SPA_POD_DYNAMIC_H
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#include <spa/pod/builder.h>
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#include <spa/utils/cleanup.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef SPA_API_POD_DYNAMIC
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#ifdef SPA_API_IMPL
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#define SPA_API_POD_DYNAMIC SPA_API_IMPL
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#else
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#define SPA_API_POD_DYNAMIC static inline
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#endif
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#endif
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struct spa_pod_dynamic_builder {
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struct spa_pod_builder b;
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void *data;
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uint32_t extend;
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uint32_t _padding;
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};
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static int spa_pod_dynamic_builder_overflow(void *data, uint32_t size)
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{
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struct spa_pod_dynamic_builder *d = (struct spa_pod_dynamic_builder*)data;
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int32_t old_size = d->b.size;
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int32_t new_size = SPA_ROUND_UP_N(size, d->extend);
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void *old_data = d->b.data, *new_data;
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if (old_data == d->data)
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d->b.data = NULL;
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if ((new_data = realloc(d->b.data, new_size)) == NULL)
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return -errno;
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if (old_data == d->data && new_data != old_data && old_size > 0)
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memcpy(new_data, old_data, old_size);
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d->b.data = new_data;
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d->b.size = new_size;
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return 0;
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}
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SPA_API_POD_DYNAMIC void spa_pod_dynamic_builder_init(struct spa_pod_dynamic_builder *builder,
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void *data, uint32_t size, uint32_t extend)
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{
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static const struct spa_pod_builder_callbacks spa_pod_dynamic_builder_callbacks = {
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.version = SPA_VERSION_POD_BUILDER_CALLBACKS,
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.overflow = spa_pod_dynamic_builder_overflow
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};
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builder->b = SPA_POD_BUILDER_INIT(data, size);
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if (extend > 0)
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spa_pod_builder_set_callbacks(&builder->b, &spa_pod_dynamic_builder_callbacks, builder);
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builder->extend = extend;
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builder->data = data;
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}
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SPA_API_POD_DYNAMIC void spa_pod_dynamic_builder_continue(struct spa_pod_dynamic_builder *builder,
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struct spa_pod_builder *b)
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{
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uint32_t remain = b->state.offset >= b->size ? 0 : b->size - b->state.offset;
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spa_pod_dynamic_builder_init(builder,
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remain ? SPA_PTROFF(b->data, b->state.offset, void) : NULL,
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remain, b->callbacks.funcs == NULL ? 0 : 4096);
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}
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SPA_API_POD_DYNAMIC void spa_pod_dynamic_builder_clean(struct spa_pod_dynamic_builder *builder)
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{
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if (builder->data != builder->b.data) {
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free(builder->b.data);
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builder->b.data = NULL;
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}
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}
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SPA_DEFINE_AUTO_CLEANUP(spa_pod_dynamic_builder, struct spa_pod_dynamic_builder, {
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spa_pod_dynamic_builder_clean(thing);
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})
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* SPA_POD_DYNAMIC_H */
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