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Code Issues Activity Actions

SoundPlayer: Added playback controls

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The playback of a file can now be paused, stopped, continued and the
user can seek to any part of the file.
This commit is contained in:
Till Mayer 2019-11-04 19:45:19 +01:00 • committed by Andreas Kling
parent 2f13517a1a
commit 77f3c12dc9
7 changed files with 405 additions and 49 deletions
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29
Applications/SoundPlayer/SampleWidget.cpp
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@ -23,30 +23,31 @@ void SampleWidget::paint_event(GPaintEvent& event)
painter.add_clip_rect(event.rect());
painter.fill_rect(frame_inner_rect(), Color::Black);
if (!m_buffer)
return;
int samples_per_pixel = m_buffer->sample_count() / frame_inner_rect().width();
float sample_max = 0;
int count = 0;
int x_offset = frame_inner_rect().x();
int x = x_offset;
int y_offset = frame_inner_rect().center().y();
for (int sample_index = 0; sample_index < m_buffer->sample_count() && (x - x_offset) < frame_inner_rect().width(); ++sample_index) {
float sample = fabsf(m_buffer->samples()[sample_index].left);
if (m_buffer) {
int samples_per_pixel = m_buffer->sample_count() / frame_inner_rect().width();
for (int sample_index = 0; sample_index < m_buffer->sample_count() && (x - x_offset) < frame_inner_rect().width(); ++sample_index) {
float sample = fabsf(m_buffer->samples()[sample_index].left);
sample_max = max(sample, sample_max);
++count;
sample_max = max(sample, sample_max);
++count;
if (count >= samples_per_pixel) {
Point min_point = { x, y_offset + static_cast<int>(-sample_max * frame_inner_rect().height() / 2) };
Point max_point = { x++, y_offset + static_cast<int>(sample_max * frame_inner_rect().height() / 2) };
painter.draw_line(min_point, max_point, Color::Green);
if (count >= samples_per_pixel) {
Point min_point = { x, y_offset + static_cast<int>(-sample_max * frame_inner_rect().height() / 2) };
Point max_point = { x++, y_offset + static_cast<int>(sample_max * frame_inner_rect().height() / 2) };
painter.draw_line(min_point, max_point, Color::Green);
count = 0;
sample_max = 0;
count = 0;
sample_max = 0;
}
}
} else {
painter.draw_line({ x, y_offset }, { frame_inner_rect().width(), y_offset }, Color::Green);
}
}