mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 07:22:45 +00:00
9edaa033e5
Visualization widgets should only have to tell how many samples they need per frame and have a render method which receives all data relevant to draw the next frame.
99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2021, Cesar Torres <shortanemoia@protonmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Forward.h>
|
|
#include <AK/TypedTransfer.h>
|
|
#include <LibAudio/Buffer.h>
|
|
#include <LibGUI/Frame.h>
|
|
#include <LibGUI/Painter.h>
|
|
|
|
class VisualizationWidget : public GUI::Frame {
|
|
C_OBJECT(VisualizationWidget)
|
|
|
|
public:
|
|
virtual void render(GUI::PaintEvent&, FixedArray<double> const& samples) = 0;
|
|
|
|
void set_buffer(RefPtr<Audio::Buffer> buffer)
|
|
{
|
|
if (buffer.is_null())
|
|
return;
|
|
if (buffer->id() == m_last_buffer_id)
|
|
return;
|
|
m_last_buffer_id = buffer->id();
|
|
|
|
if (m_sample_buffer.size() != static_cast<size_t>(buffer->sample_count()))
|
|
m_sample_buffer.resize(buffer->sample_count());
|
|
|
|
for (size_t i = 0; i < static_cast<size_t>(buffer->sample_count()); i++)
|
|
m_sample_buffer.data()[i] = (buffer->samples()[i].left + buffer->samples()[i].right) / 2.;
|
|
|
|
m_frame_count = 0;
|
|
}
|
|
|
|
virtual void set_samplerate(int samplerate)
|
|
{
|
|
m_samplerate = samplerate;
|
|
}
|
|
|
|
virtual void paint_event(GUI::PaintEvent& event) override
|
|
{
|
|
if (m_sample_buffer.size() == 0) {
|
|
Frame::paint_event(event);
|
|
GUI::Painter painter(*this);
|
|
painter.add_clip_rect(event.rect());
|
|
painter.fill_rect(frame_inner_rect(), Color::Black);
|
|
return;
|
|
}
|
|
|
|
if (m_render_buffer.size() == 0)
|
|
return;
|
|
|
|
size_t buffer_position = (m_frame_count * REFRESH_TIME_MILLISECONDS) * m_samplerate / 1000;
|
|
if (buffer_position + m_render_buffer.size() >= m_sample_buffer.size())
|
|
buffer_position = m_sample_buffer.size() - m_render_buffer.size();
|
|
|
|
AK::TypedTransfer<double>::copy(m_render_buffer.data(), m_sample_buffer.span().slice(buffer_position).data(), m_render_buffer.size());
|
|
|
|
render(event, m_render_buffer);
|
|
}
|
|
|
|
virtual void timer_event(Core::TimerEvent&) override
|
|
{
|
|
update();
|
|
m_frame_count++;
|
|
}
|
|
|
|
size_t frame_count() const { return m_frame_count; }
|
|
|
|
ErrorOr<void> set_render_sample_count(size_t count)
|
|
{
|
|
auto new_buffer = TRY(FixedArray<double>::try_create(count));
|
|
m_render_buffer.swap(new_buffer);
|
|
return {};
|
|
}
|
|
virtual void start_new_file(StringView) { }
|
|
|
|
protected:
|
|
int m_samplerate;
|
|
int m_last_buffer_id;
|
|
size_t m_frame_count;
|
|
Vector<double> m_sample_buffer;
|
|
FixedArray<double> m_render_buffer;
|
|
|
|
static constexpr size_t REFRESH_TIME_MILLISECONDS = 30;
|
|
|
|
VisualizationWidget()
|
|
: m_samplerate(-1)
|
|
, m_last_buffer_id(-1)
|
|
, m_frame_count(0)
|
|
{
|
|
start_timer(REFRESH_TIME_MILLISECONDS);
|
|
}
|
|
|
|
virtual ~VisualizationWidget() = default;
|
|
};
|