yyc12345

.editorconfig

@@ -0,0 +1,7 @@
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 4

CMakeLists.txt

@@ -20,6 +20,12 @@ find_package(Qt6 6.6 COMPONENTS Widgets Multimedia Network LinguistTools REQUIRE
 find_package(KF6Codecs 6.1.0)
 find_package(PkgConfig)
 
+option(KISSFFT_PKGCONFIG OFF)
+option(KISSFFT_STATIC ON)
+option(KISSFFT_TEST OFF)
+option(KISSFFT_TOOLS OFF)
+add_subdirectory(kissfft EXCLUDE_FROM_ALL)
+
 if (USE_QTEXTCODEC)
     find_package(Qt6 6.6 COMPONENTS Core5Compat REQUIRED)
 endif()
@@ -36,6 +42,7 @@ set (PMUSIC_CPP_FILES
     singleapplicationmanager.cpp
     lrcbar.cpp
     lyricsmanager.cpp
+    fftspectrum.cpp
 )
 
 set (PMUSIC_HEADER_FILES
@@ -45,6 +52,7 @@ set (PMUSIC_HEADER_FILES
     singleapplicationmanager.h
     lrcbar.h
     lyricsmanager.h
+    fftspectrum.h
 )
 
 set (PMUSIC_UI_FILES
@@ -84,7 +92,7 @@ if (TARGET KF6::Codecs)
     target_link_libraries (${EXE_NAME} PRIVATE KF6::Codecs)
 endif ()
 
-target_link_libraries(${EXE_NAME} PRIVATE Qt::Widgets Qt::Multimedia Qt::Network)
+target_link_libraries(${EXE_NAME} PRIVATE Qt::Widgets Qt::Multimedia Qt::Network kissfft::kissfft)
 
 if (USE_QTEXTCODEC)
     target_compile_definitions(${EXE_NAME} PRIVATE USE_QTEXTCODEC=1)

fftspectrum.cpp

@@ -0,0 +1,89 @@
+// SPDX-FileCopyrightText: 2024 Gary Wang <git@blumia.net>
+//
+// SPDX-License-Identifier: MIT
+
+#include "fftspectrum.h"
+
+#include <QAudioBuffer>
+#include <QAudioBufferOutput>
+#include <QPainter>
+
+#include <kissfft.hh>
+
+FFTSpectrum::FFTSpectrum(QWidget* parent)
+    : QWidget(parent)
+    , m_audioBufferOutput(new QAudioBufferOutput(this))
+{
+    connect(this, &FFTSpectrum::mediaPlayerChanged, this, [=]() {
+        if (m_mediaPlayer) {
+            m_mediaPlayer->setAudioBufferOutput(m_audioBufferOutput);
+        }
+    });
+
+    connect(m_audioBufferOutput, &QAudioBufferOutput::audioBufferReceived, this, [=](const QAudioBuffer& buffer) {
+        const QAudioFormat&& fmt = buffer.format();
+        const QAudioFormat::SampleFormat sampleFormat = fmt.sampleFormat();
+        int channelCount = fmt.channelCount();
+        const int frameCount = buffer.frameCount();
+        kissfft<float> fft(frameCount, false);
+        std::vector<kissfft<float>::cpx_t> samples(frameCount);
+        std::vector<kissfft<float>::cpx_t> mass(frameCount);
+        if (sampleFormat == QAudioFormat::Int16 && channelCount == 1) {
+            const QAudioBuffer::S16M* data = buffer.constData<QAudioBuffer::S16M>();
+            for (int i = 0; i < frameCount; ++i) {
+                samples[i].real(data[i].value(QAudioFormat::FrontCenter) / float(32768));
+                samples[i].imag(0);
+            }
+        } else if (sampleFormat == QAudioFormat::Float && channelCount == 2) {
+            const QAudioBuffer::F32S* data = buffer.constData<QAudioBuffer::F32S>();
+            for (int i = 0; i < frameCount; ++i) {
+                samples[i].real(data[i].value(QAudioFormat::FrontLeft));
+                samples[i].imag(0);
+            }
+        }
+        fft.transform(samples.data(), mass.data());
+        m_freq.resize(frameCount);
+        for (int i = 0; i < frameCount; i++) {
+            m_freq[i] = sqrt(mass[i].real() * mass[i].real() + mass[i].imag() * mass[i].imag());
+        }
+        for (auto& val : m_freq) {
+            val = log10(val + 1);
+        }
+        qDebug() << m_freq.size() << "updated";
+        update();
+        qDebug() << sampleFormat << channelCount;
+    });
+
+    resize(490, 420);
+}
+
+FFTSpectrum::~FFTSpectrum()
+{
+
+}
+
+void FFTSpectrum::setMediaPlayer(QMediaPlayer* player)
+{
+    m_mediaPlayer = player;
+    emit mediaPlayerChanged();
+}
+
+void FFTSpectrum::paintEvent(QPaintEvent* e)
+{
+    QPainter painter(this);
+    painter.fillRect(rect(), Qt::black);
+
+    if (!m_freq.empty()) {
+        int width = this->width();
+        int height = this->height();
+        int barWidth = std::max(1ULL, width / m_freq.size());
+        qDebug() << m_freq.size() << barWidth << m_freq << "freq";
+
+        for (int i = 0; i < m_freq.size(); i++) {
+            int barHeight = static_cast<int>(m_freq[i] * height);
+            painter.fillRect(i * barWidth, height - barHeight, barWidth, barHeight, Qt::green);
+        }
+    }
+}
+
+

fftspectrum.h

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: 2024 Gary Wang <git@blumia.net>
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <QWidget>
+#include <QMediaPlayer>
+
+class QAudioBufferOutput;
+class FFTSpectrum : public QWidget
+{
+    Q_OBJECT
+    Q_PROPERTY(QMediaPlayer * mediaPlayer MEMBER m_mediaPlayer WRITE setMediaPlayer NOTIFY mediaPlayerChanged)
+public:
+    explicit FFTSpectrum(QWidget* parent);
+    ~FFTSpectrum();
+
+    void setMediaPlayer(QMediaPlayer* player);
+
+signals:
+    void mediaPlayerChanged();
+
+protected:
+    void paintEvent(QPaintEvent* e) override;
+
+private:
+    QMediaPlayer* m_mediaPlayer = nullptr;
+    QAudioBufferOutput* m_audioBufferOutput = nullptr;
+    std::vector<float> m_freq;
+};

mainwindow.cpp

@@ -6,6 +6,7 @@
 #include "./ui_mainwindow.h"
 
 #include "playlistmanager.h"
+#include "fftspectrum.h"
 #include "lrcbar.h"
 
 // taglib
@@ -17,6 +18,7 @@
 #include <QMediaPlayer>
 #include <QMediaMetaData>
 #include <QAudioOutput>
+#include <QAudioBuffer>
 #include <QPropertyAnimation>
 #include <QFileDialog>
 #include <QTime>
@@ -41,13 +43,15 @@ MainWindow::MainWindow(QWidget *parent)
     , m_mediaDevices(new QMediaDevices(this))
     , m_mediaPlayer(new QMediaPlayer(this))
     , m_audioOutput(new QAudioOutput(this))
+    , m_fftSpectrum(new FFTSpectrum(this))
     , m_lrcbar(new LrcBar(nullptr))
     , m_playlistManager(new PlaylistManager(this))
 {
     ui->setupUi(this);
     m_playlistManager->setAutoLoadFilterSuffixes({
-        "*.mp3", "*.wav", "*.aiff", "*.ape", "*.flac", "*.ogg", "*.oga", "*.mpga", "*.aac"
+        "*.mp3", "*.wav", "*.aiff", "*.ape", "*.flac", "*.ogg", "*.oga", "*.mpga", "*.aac", "*.tta"
     });
+    m_fftSpectrum->setMediaPlayer(m_mediaPlayer);
     m_mediaPlayer->setAudioOutput(m_audioOutput);
     m_mediaPlayer->setLoops(QMediaPlayer::Infinite);
     ui->playlistView->setModel(m_playlistManager->model());
@@ -438,6 +442,7 @@ void MainWindow::initConnections()
         setAudioMetadataForDisplay(metadata.stringValue(QMediaMetaData::Title),
                                    metadata.stringValue(QMediaMetaData::Author),
                                    metadata.stringValue(QMediaMetaData::AlbumTitle));
+        setAudioPropertyInfoForDisplay(-1, metadata.value(QMediaMetaData::AudioBitRate).toInt() / 1000, -1, metadata.stringValue(QMediaMetaData::FileFormat));
 #endif // NO_TAGLIB
         QVariant coverArt(metadata.value(QMediaMetaData::ThumbnailImage));
         if (!coverArt.isNull()) {

mainwindow.h

@@ -17,6 +17,7 @@ class QAudioOutput;
 class QPropertyAnimation;
 QT_END_NAMESPACE
 
+class FFTSpectrum;
 class LrcBar;
 class PlaylistManager;
 class MainWindow : public QMainWindow
@@ -92,6 +93,7 @@ private:
     QMediaDevices *m_mediaDevices;
     QMediaPlayer *m_mediaPlayer;
     QAudioOutput *m_audioOutput;
+    FFTSpectrum* m_fftSpectrum;
     LrcBar *m_lrcbar;
     QPropertyAnimation *m_fadeOutAnimation;
     PlaylistManager *m_playlistManager;