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Update audio example

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This commit is contained in:
Nikita Lisitsa 2022-10-08 19:14:12 +03:00
parent 8048496535
commit cb69759cce
1 changed files with 19 additions and 1 deletions
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20
examples/audio.cpp
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@ -9,6 +9,8 @@
#include <psemek/audio/effect/fade_out.hpp> #include <psemek/audio/effect/fade_out.hpp>
#include <psemek/audio/effect/compressor.hpp> #include <psemek/audio/effect/compressor.hpp>
#include <psemek/audio/effect/pause.hpp> #include <psemek/audio/effect/pause.hpp>
#include <psemek/audio/effect/loop.hpp>
#include <psemek/audio/effect/pitch.hpp>
#include <psemek/audio/duplicate.hpp> #include <psemek/audio/duplicate.hpp>
#include <psemek/audio/stereo.hpp> #include <psemek/audio/stereo.hpp>
#include <psemek/audio/mixer.hpp> #include <psemek/audio/mixer.hpp>
@ -20,6 +22,7 @@
#include <psemek/geom/constants.hpp> #include <psemek/geom/constants.hpp>
#include <psemek/geom/camera.hpp> #include <psemek/geom/camera.hpp>
#include <psemek/prof/profiler.hpp> #include <psemek/prof/profiler.hpp>
#include <psemek/io/file_stream.hpp>
#include <map> #include <map>
@ -69,8 +72,10 @@ struct audio_app
: app::app("Audio example") : app::app("Audio example")
{ {
mixer_ = audio::make_mixer(); mixer_ = audio::make_mixer();
volume_control_ = audio::volume_stereo(mixer_, 0.5f, 0.5f, 0.1f); volume_control_ = audio::volume_stereo(mixer_, 0.5f, 0.5f, 0.1f);
auto compressor = audio::compressor(volume_control_, audio::from_db(-2.f), 0.95f, 0.002f, 1.f, audio::from_db(1.f)); pitch_control_ = audio::pitch(volume_control_, 1.f, 0.1f);
auto compressor = audio::compressor(pitch_control_, audio::from_db(-2.f), 0.95f, 0.002f, 1.f, audio::from_db(1.f));
pause_control_ = audio::pause(compressor, false, 0.01f); pause_control_ = audio::pause(compressor, false, 0.01f);
engine_.output()->stream(pause_control_); engine_.output()->stream(pause_control_);
} }
@ -90,6 +95,12 @@ struct audio_app
{ {
pause_control_->paused(!pause_control_->paused()); pause_control_->paused(!pause_control_->paused());
} }
if (key == SDLK_KP_PLUS)
pitch_control_->pitch(std::pow(2.f, 1.f / 12.f));
if (key == SDLK_KP_MINUS)
pitch_control_->pitch(std::pow(2.f, - 1.f / 12.f));
} }
void on_key_up(SDL_Keycode key) override void on_key_up(SDL_Keycode key) override
@ -103,6 +114,12 @@ struct audio_app
ch->stream(audio::fade_out(s, 0.01f)); ch->stream(audio::fade_out(s, 0.01f));
channels_.erase(key); channels_.erase(key);
} }
if (key == SDLK_KP_PLUS)
pitch_control_->pitch(1.f);
if (key == SDLK_KP_MINUS)
pitch_control_->pitch(1.f);
} }
void update() override void update() override
@ -139,6 +156,7 @@ private:
audio::engine engine_; audio::engine engine_;
audio::mixer_ptr mixer_; audio::mixer_ptr mixer_;
std::shared_ptr<audio::volume_control_stereo> volume_control_; std::shared_ptr<audio::volume_control_stereo> volume_control_;
std::shared_ptr<audio::pitch_control> pitch_control_;
std::shared_ptr<audio::pause_control> pause_control_; std::shared_ptr<audio::pause_control> pause_control_;
std::map<SDL_Keycode, audio::channel_ptr> channels_; std::map<SDL_Keycode, audio::channel_ptr> channels_;