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Add audio::mixer::max_length
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This commit is contained in:
Nikita Lisitsa 2026-07-19 19:39:54 +03:00
parent 99b103b267
commit 506a6c303e
2 changed files with 14 additions and 0 deletions
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1
libs/audio/include/psemek/audio/combine/mixer.hpp
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@ -15,6 +15,7 @@ namespace psemek::audio
virtual channel_ptr add(stream_ptr stream) = 0; virtual channel_ptr add(stream_ptr stream) = 0;
virtual std::size_t stream_count() const = 0; virtual std::size_t stream_count() const = 0;
virtual std::size_t max_length() const = 0;
}; };
using mixer_ptr = std::shared_ptr<mixer>; using mixer_ptr = std::shared_ptr<mixer>;

13
libs/audio/source/combine/mixer.cpp
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@ -22,6 +22,8 @@ namespace psemek::audio
return stream_count_.load(); return stream_count_.load();
} }
std::size_t max_length() const override;
std::size_t read(util::span<float> samples) override; std::size_t read(util::span<float> samples) override;
std::optional<std::size_t> length() const override std::optional<std::size_t> length() const override
@ -59,6 +61,17 @@ namespace psemek::audio
return result; return result;
} }
std::size_t mixer_impl::max_length() const
{
// TODO: safe access when the mixer is already playing?
std::size_t result = 0;
for (auto const & channel : new_channels_)
if (auto stream = channel->stream())
if (auto length = stream->length(); length && *length > result)
result = *length;
return result;
}
std::size_t mixer_impl::read(util::span<float> samples) std::size_t mixer_impl::read(util::span<float> samples)
{ {
{ {