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Implement raw audio::track from scratch, without dependence on recoder & duplicator

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This commit is contained in:
Nikita Lisitsa 2023-01-10 14:41:12 +03:00
parent 633e366650
commit a67e00d601
1 changed files with 84 additions and 5 deletions
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89
libs/audio/source/track_raw.cpp
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@ -1,17 +1,96 @@
#include <psemek/audio/track.hpp> #include <psemek/audio/track.hpp>
#include <psemek/audio/combine/duplicate.hpp>
#include <atomic>
namespace psemek::audio namespace psemek::audio
{ {
track_ptr load_raw(util::span<float const> data) namespace
{ {
return make_duplicator(make_recorder(data));
struct data_holder
{
std::vector<float> storage;
util::span<float const> samples;
data_holder(util::span<float const> samples)
: samples(samples)
{}
data_holder(std::vector<float> storage)
: storage(std::move(storage))
, samples(this->storage)
{}
};
struct raw_stream_impl
: stream
{
raw_stream_impl(std::shared_ptr<data_holder> data_holder)
: data_holder_(std::move(data_holder))
{}
std::optional<std::size_t> length() const override
{
return data_holder_->samples.size();
}
std::size_t read(util::span<float> samples) override
{
auto played = played_.load();
auto count = std::min(data_holder_->samples.size() - played, samples.size());
std::copy(data_holder_->samples.begin() + played, data_holder_->samples.begin() + played + count, samples.begin());
played_.fetch_add(count);
return count;
}
std::size_t played() const override
{
return played_;
}
private:
std::shared_ptr<data_holder> data_holder_;
std::atomic<std::size_t> played_{0};
};
struct raw_track_impl
: track
{
raw_track_impl(std::shared_ptr<data_holder> data_holder)
: data_holder_(std::move(data_holder))
{}
stream_ptr stream() const override
{
return std::make_shared<raw_stream_impl>(data_holder_);
}
std::optional<std::size_t> length() const override
{
return data_holder_->samples.size();
}
private:
std::shared_ptr<data_holder> data_holder_;
};
} }
track_ptr load_raw(std::vector<float> data) track_ptr load_raw(util::span<float const> samples)
{ {
return make_duplicator(make_recorder(std::move(data))); if ((samples.size() % 2) != 0)
throw std::runtime_error("bad sample count");
return std::make_shared<raw_track_impl>(std::make_shared<data_holder>(samples));
}
track_ptr load_raw(std::vector<float> samples)
{
if ((samples.size() % 2) != 0)
throw std::runtime_error("bad sample count");
return std::make_shared<raw_track_impl>(std::make_shared<data_holder>(std::move(samples)));
} }
} }