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path: root/src/plugins/Visual/analyzer/analyzer.cpp
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Diffstat (limited to 'src/plugins/Visual/analyzer/analyzer.cpp')
-rw-r--r--src/plugins/Visual/analyzer/analyzer.cpp125
1 files changed, 53 insertions, 72 deletions
diff --git a/src/plugins/Visual/analyzer/analyzer.cpp b/src/plugins/Visual/analyzer/analyzer.cpp
index c071b12f2..22941892f 100644
--- a/src/plugins/Visual/analyzer/analyzer.cpp
+++ b/src/plugins/Visual/analyzer/analyzer.cpp
@@ -1,5 +1,5 @@
/***************************************************************************
- * Copyright (C) 2007 by Ilya Kotov *
+ * Copyright (C) 2007-2010 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* This program is free software; you can redistribute it and/or modify *
@@ -32,6 +32,8 @@
#include "inlines.h"
#include "analyzer.h"
+#define VISUAL_NODE_SIZE 512 //samples
+#define VISUAL_BUFFER_SIZE (5*VISUAL_NODE_SIZE)
Analyzer::Analyzer (QWidget *parent)
: Visual (parent), m_fps (20)
@@ -42,8 +44,9 @@ Analyzer::Analyzer (QWidget *parent)
m_pixmap = QPixmap (75,20);
m_timer = new QTimer (this);
connect(m_timer, SIGNAL (timeout()), this, SLOT (timeout()));
- m_nodes.clear();
-
+ m_left_buffer = new short[VISUAL_BUFFER_SIZE];
+ m_right_buffer = new short[VISUAL_BUFFER_SIZE];
+ m_buffer_at = 0;
clear();
setWindowTitle (tr("Qmmp Analyzer"));
@@ -66,14 +69,13 @@ Analyzer::Analyzer (QWidget *parent)
Analyzer::~Analyzer()
{
- while (!m_nodes.isEmpty())
- m_nodes.removeFirst();
+ delete [] m_left_buffer;
+ delete [] m_right_buffer;
}
void Analyzer::clear()
{
- while (!m_nodes.isEmpty())
- m_nodes.removeFirst();
+ m_buffer_at = 0;
for (int i = 0; i< 75; ++i)
{
m_intern_vis_data[i] = 0;
@@ -87,50 +89,44 @@ void Analyzer::add (unsigned char *data, qint64 size, int chan)
if (!m_timer->isActive ())
return;
- short *l = 0, *r = 0;
- qint64 samples = size/chan >> 1;
- int frames = samples/512;
- for (int i = 0; i < frames; ++i)
+ if(VISUAL_BUFFER_SIZE == m_buffer_at)
{
- l = new short[512];
- r = 0;
- if (chan == 2)
- {
- r = new short[512];
- stereo16_from_stereopcm16 (l, r, (short *) (data + i*4*512), 512);
- }
- else if (chan == 1)
- mono16_from_monopcm16 (l, (short *) (data + i*2*512), 512);
- else
- {
- r = new short[512];
- stereo16_from_multichannel(l, r, (short *) (data + i*2*chan*512), 512, chan);
- }
- m_nodes.append (new VisualNode (l, r, 512));
+ m_buffer_at -= VISUAL_NODE_SIZE;
+ memmove(m_left_buffer, m_left_buffer + VISUAL_NODE_SIZE, m_buffer_at << 1);
+ memmove(m_right_buffer, m_right_buffer + VISUAL_NODE_SIZE, m_buffer_at << 1);
+ return;
}
-}
-void Analyzer::timeout()
-{
- VisualNode *node = 0;
- mutex()->lock ();
+ int frames = qMin((int)size/chan >> 1, VISUAL_BUFFER_SIZE - m_buffer_at);
- while(m_nodes.size() > 5)
+ if (chan >= 2)
{
- delete m_nodes.takeFirst();
+ stereo16_from_multichannel(m_left_buffer + m_buffer_at,
+ m_right_buffer + m_buffer_at,(short *) data, frames, chan);
+ }
+ else
+ {
+ memcpy(m_left_buffer + m_buffer_at, (short *) data, frames << 1);
+ memcpy(m_right_buffer + m_buffer_at, (short *) data, frames << 1);
}
- if(!m_nodes.isEmpty())
- node = m_nodes.takeFirst();
-
- mutex()->unlock();
+ m_buffer_at += frames;
+}
- if (node)
+void Analyzer::timeout()
+{
+ mutex()->lock ();
+ if(m_buffer_at < VISUAL_NODE_SIZE)
{
- process (node);
- delete node;
- update();
+ mutex()->unlock ();
+ return;
}
+
+ process (m_left_buffer, m_right_buffer);
+ m_buffer_at -= VISUAL_NODE_SIZE;
+ memmove(m_left_buffer, m_left_buffer + VISUAL_NODE_SIZE, m_buffer_at << 1);
+ memmove(m_right_buffer, m_right_buffer + VISUAL_NODE_SIZE, m_buffer_at << 1);
+ mutex()->unlock ();
update();
}
@@ -159,7 +155,7 @@ void Analyzer::closeEvent (QCloseEvent *event)
Visual::closeEvent(event); //removes visualization before class deleting
}
-bool Analyzer::process (VisualNode *node)
+void Analyzer::process (short *left, short *right)
{
static fft_state *state = 0;
if (!state)
@@ -174,15 +170,9 @@ bool Analyzer::process (VisualNode *node)
36, 47, 62, 82, 107, 141, 184, 255
};
- if (node)
- {
- //i = node->length;
- calc_freq (dest_l, node->left);
- if (node->right)
- calc_freq (dest_r, node->right);
- }
- else
- return false;
+ calc_freq (dest_l, left);
+ calc_freq (dest_r, right);
+
const double y_scale = 3.60673760222; /* 20.0 / log(256) */
int yl,yr, j;
@@ -194,16 +184,14 @@ bool Analyzer::process (VisualNode *node)
{
if (dest_l[j] > yl)
yl = dest_l[j];
- if (dest_r[j] > yr && node->right)
+ if (dest_r[j] > yr)
yr = dest_r[j];
}
yl >>= 7;
+ yr >>= 7;
int magnitude_l = 0;
int magnitude_r = 0;
- if (node->right)
- {
- yr >>= 7;
- }
+
if (yl)
{
magnitude_l = int(log (yl) * y_scale);
@@ -212,7 +200,7 @@ bool Analyzer::process (VisualNode *node)
if (magnitude_l < 0)
magnitude_l = 0;
}
- if (yr && node->right)
+ if (yr)
{
magnitude_r = int(log (yr) * y_scale);
if (magnitude_r > 15)
@@ -224,27 +212,20 @@ bool Analyzer::process (VisualNode *node)
m_intern_vis_data[i] -= m_analyzer_falloff;
m_intern_vis_data[i] = magnitude_l > m_intern_vis_data[i]
? magnitude_l : m_intern_vis_data[i];
- if (node->right)
- {
- m_intern_vis_data[37-i] -= m_analyzer_falloff;
- m_intern_vis_data[37-i] = magnitude_r > m_intern_vis_data[37-i]
- ? magnitude_r : m_intern_vis_data[37-i];
- }
+
+ m_intern_vis_data[37-i] -= m_analyzer_falloff;
+ m_intern_vis_data[37-i] = magnitude_r > m_intern_vis_data[37-i]
+ ? magnitude_r : m_intern_vis_data[37-i];
if (m_show_peaks)
{
m_peaks[i] -= m_peaks_falloff;
- m_peaks[i] = magnitude_l > m_peaks[i]
- ? magnitude_l : m_peaks[i];
- if (node->right)
- {
- m_peaks[37-i] -= m_peaks_falloff;
- m_peaks[37-i] = magnitude_r > m_peaks[37-i]
- ? magnitude_r : m_peaks[37-i];
- }
+ m_peaks[i] = magnitude_l > m_peaks[i] ? magnitude_l : m_peaks[i];
+
+ m_peaks[37-i] -= m_peaks_falloff;
+ m_peaks[37-i] = magnitude_r > m_peaks[37-i] ? magnitude_r : m_peaks[37-i];
}
}
- return true;
}
void Analyzer::draw (QPainter *p)
generated by cgit v1.2.3-13-gbd6f (git 2.30.0) at 2025-12-15 14:17:55 +0000