75 lines
2 KiB
C
75 lines
2 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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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <spa/pod/builder.h>
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#include <spa/utils/cleanup.h>
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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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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_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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}
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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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