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swscale/graph: fix memleak of cascaded graphs

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Just free them directly and discard the parent context.

Fixes: bf738412e8
Signed-off-by: Niklas Haas <git@haasn.dev>
Sponsored-by: Sovereign Tech Fund
This commit is contained in:
Niklas Haas 2024-12-02 11:28:45 +01:00
parent 40302cc35b
commit 79452d382f
1 changed files with 7 additions and 5 deletions
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12
libswscale/graph.c
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@ -292,7 +292,7 @@ static void legacy_chr_pos(SwsGraph *graph, int *chr_pos, int override, int *war
*chr_pos = override;
}
static int init_legacy_subpass(SwsGraph *graph, SwsContext *sws, int cascaded,
static int init_legacy_subpass(SwsGraph *graph, SwsContext *sws,
SwsPass *input, SwsPass **output)
{
SwsInternal *c = sws_internal(sws);
@ -308,11 +308,14 @@ static int init_legacy_subpass(SwsGraph *graph, SwsContext *sws, int cascaded,
for (int i = 0; i < num_cascaded; i++) {
SwsContext *sub = c->cascaded_context[i];
const int is_last = i + 1 == num_cascaded;
ret = init_legacy_subpass(graph, sub, 1, input, is_last ? output : &input);
ret = init_legacy_subpass(graph, sub, input, is_last ? output : &input);
if (ret < 0)
return ret;
/* Steal cascaded context, so we can free the parent */
c->cascaded_context[i] = NULL;
}
sws_free_context(&sws);
return 0;
}
@ -336,8 +339,7 @@ static int init_legacy_subpass(SwsGraph *graph, SwsContext *sws, int cascaded,
if (!pass)
return AVERROR(ENOMEM);
pass->setup = setup_legacy_swscale;
if (!cascaded) /* parent context frees this automatically */
pass->free = free_legacy_swscale;
pass->free = free_legacy_swscale;
/**
* For slice threading, we need to create sub contexts, similar to how
@ -452,7 +454,7 @@ static int add_legacy_sws_pass(SwsGraph *graph, SwsFormat src, SwsFormat dst,
brightness, contrast, saturation);
}
ret = init_legacy_subpass(graph, sws, 0, input, output);
ret = init_legacy_subpass(graph, sws, input, output);
if (ret < 0) {
sws_free_context(&sws);
return ret;