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filter/convert: add method IsActive()

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This commit is contained in:
Max Kellermann 2018-02-09 19:04:45 +01:00
parent 6de92bb42b
commit 56b74ad990
1 changed files with 10 additions and 6 deletions
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16
src/filter/plugins/ConvertFilterPlugin.cxx
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@ -57,6 +57,11 @@ public:
}
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
private:
bool IsActive() const noexcept {
return out_audio_format != in_audio_format;
}
};
class PreparedConvertFilter final : public PreparedFilter {
@ -80,7 +85,7 @@ ConvertFilter::Set(const AudioFormat &_out_audio_format)
/* no change */
return;
if (out_audio_format != in_audio_format) {
if (IsActive()) {
out_audio_format = in_audio_format;
state.Close();
}
@ -111,7 +116,7 @@ ConvertFilter::~ConvertFilter()
{
assert(in_audio_format.IsValid());
if (out_audio_format != in_audio_format)
if (IsActive())
state.Close();
}
@ -120,11 +125,10 @@ ConvertFilter::FilterPCM(ConstBuffer<void> src)
{
assert(in_audio_format.IsValid());
if (out_audio_format == in_audio_format)
return IsActive()
? state.Convert(src)
/* optimized special case: no-op */
return src;
return state.Convert(src);
: src;
}
const FilterPlugin convert_filter_plugin = {