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mixer/software: fix double free bug

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This commit is contained in:
Max Kellermann 2013-10-30 22:47:24 +01:00
parent da8bdd62c8
commit 88e630170e
1 changed files with 15 additions and 3 deletions
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18
src/mixer/SoftwareMixerPlugin.cxx
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@ -41,18 +41,28 @@ CreateVolumeFilter()
struct SoftwareMixer final : public Mixer {
Filter *filter;
/**
* If this is true, then this object "owns" the #Filter
* instance (see above). It will be set to false by
* software_mixer_get_filter(); after that, the caller will be
* responsible for the #Filter.
*/
bool owns_filter;
unsigned volume;
SoftwareMixer()
:Mixer(software_mixer_plugin),
filter(CreateVolumeFilter()),
volume(100)
filter(CreateVolumeFilter()),
owns_filter(true),
volume(100)
{
assert(filter != nullptr);
}
~SoftwareMixer() {
delete filter;
if (owns_filter)
delete filter;
}
};
@ -115,6 +125,8 @@ software_mixer_get_filter(Mixer *mixer)
{
SoftwareMixer *sm = (SoftwareMixer *)mixer;
assert(sm->IsPlugin(software_mixer_plugin));
assert(sm->owns_filter);
sm->owns_filter = false;
return sm->filter;
}