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filter: build result in separate builder and copy

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Build the filtered result into a new separate builder and copy it into
the result builder afterwards. This ensures the memory of the old
builder does not suddenly change when it gets reallocated.
This commit is contained in:
Wim Taymans 2025-04-04 11:06:02 +02:00
parent 205ee5b6b0
commit 2f21b27397
1 changed files with 11 additions and 7 deletions
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18
spa/include/spa/pod/filter.h
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@ -19,6 +19,7 @@ extern "C" {
#include <spa/pod/iter.h>
#include <spa/pod/builder.h>
#include <spa/pod/compare.h>
#include <spa/pod/dynamic.h>
#ifndef SPA_API_POD_FILTER
#ifdef SPA_API_IMPL
@ -438,14 +439,17 @@ spa_pod_filter(struct spa_pod_builder *b,
spa_return_val_if_fail(b != NULL, -EINVAL);
spa_pod_builder_get_state(b, &state);
if (filter == NULL)
if (filter == NULL) {
res = spa_pod_builder_raw_padded(b, pod, SPA_POD_SIZE(pod));
else
res = spa_pod_filter_part(b, pod, SPA_POD_SIZE(pod), filter, SPA_POD_SIZE(filter));
if (res < 0) {
spa_pod_builder_reset(b, &state);
} else if (result) {
} else {
struct spa_pod_dynamic_builder db;
spa_pod_dynamic_builder_continue(&db, b);
res = spa_pod_filter_part(&db.b, pod, SPA_POD_SIZE(pod), filter, SPA_POD_SIZE(filter));
if (res >= 0)
res = spa_pod_builder_raw_padded(b, db.b.data, db.b.state.offset);
spa_pod_dynamic_builder_clean(&db);
}
if (res >= 0 && result) {
*result = (struct spa_pod*)spa_pod_builder_deref(b, state.offset);
if (*result == NULL)
res = -ENOSPC;