C++ TrackPointer::getWaveform方法代码示例

void GLVSyncTestRenderer::draw(QPainter* painter, QPaintEvent* /*event*/) {

    PerformanceTimer timer;
    //int t5, t6, t7, t8, t9, t10, t11, t12, t13;


    timer.start();

    TrackPointer pTrack = m_waveformRenderer->getTrackInfo();
    if (!pTrack) {
        return;
    }

    ConstWaveformPointer waveform = pTrack->getWaveform();
    if (waveform.isNull()) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;

    const int firstIndex = int(firstVisualIndex + 0.5);
    firstVisualIndex = firstIndex - firstIndex % 2;

    const int lastIndex = int(lastVisualIndex + 0.5);
    lastVisualIndex = lastIndex + lastIndex % 2;

    //t5 = timer.restart(); // 910

    // Reset device for native painting
    painter->beginNativePainting();

    //t6 = timer.restart(); // 29,150

    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    //  Removed Unsupported OpenGL functions, so that Mixxx can run on OpenGL-ES systems -- amvanbaren 9/2015
    //  TODO(XXX) Rewrite OpenGL code in glvsynctestrenderer.cpp to support
    //  the new OpenGL syntax or use Qt instead

    //t12 = timer.restart(); // 22,426
    painter->endNativePainting();

    //t13 = timer.restart(); // 1,430

    //qDebug() << t5 << t6 << t7 << t8 << t9 << t10 << t11 << t12 << t13;

    //qDebug() << timer.restart(); // 129,498
}

bool AnalyzerWaveform::isDisabledOrLoadStoredSuccess(TrackPointer tio) const {
    ConstWaveformPointer pTrackWaveform = tio->getWaveform();
    ConstWaveformPointer pTrackWaveformSummary = tio->getWaveformSummary();
    ConstWaveformPointer pLoadedTrackWaveform;
    ConstWaveformPointer pLoadedTrackWaveformSummary;

    TrackId trackId = tio->getId();
    bool missingWaveform = pTrackWaveform.isNull();
    bool missingWavesummary = pTrackWaveformSummary.isNull();

    if (trackId.isValid() && (missingWaveform || missingWavesummary)) {
        QList<AnalysisDao::AnalysisInfo> analyses =
                m_pAnalysisDao->getAnalysesForTrack(trackId);

        QListIterator<AnalysisDao::AnalysisInfo> it(analyses);
        while (it.hasNext()) {
            const AnalysisDao::AnalysisInfo& analysis = it.next();
            WaveformFactory::VersionClass vc;

            if (analysis.type == AnalysisDao::TYPE_WAVEFORM) {
                vc = WaveformFactory::waveformVersionToVersionClass(analysis.version);
                if (missingWaveform && vc == WaveformFactory::VC_USE) {
                    pLoadedTrackWaveform = ConstWaveformPointer(
                            WaveformFactory::loadWaveformFromAnalysis(analysis));
                    missingWaveform = false;
                } else if (vc != WaveformFactory::VC_KEEP) {
                    // remove all other Analysis except that one we should keep
                    m_pAnalysisDao->deleteAnalysis(analysis.analysisId);
                }
            } if (analysis.type == AnalysisDao::TYPE_WAVESUMMARY) {
                vc = WaveformFactory::waveformSummaryVersionToVersionClass(analysis.version);
                if (missingWavesummary && vc == WaveformFactory::VC_USE) {
                    pLoadedTrackWaveformSummary = ConstWaveformPointer(
                            WaveformFactory::loadWaveformFromAnalysis(analysis));
                    missingWavesummary = false;
                } else if (vc != WaveformFactory::VC_KEEP) {
                    // remove all other Analysis except that one we should keep
                    m_pAnalysisDao->deleteAnalysis(analysis.analysisId);
                }
            }
        }
    }

    // If we don't need to calculate the waveform/wavesummary, skip.
    if (!missingWaveform && !missingWavesummary) {
        kLogger.debug() << "loadStored - Stored waveform loaded";
        if (pLoadedTrackWaveform) {
            tio->setWaveform(pLoadedTrackWaveform);
        }
        if (pLoadedTrackWaveformSummary) {
            tio->setWaveformSummary(pLoadedTrackWaveformSummary);
        }
        return true;
    }
    return false;
}

bool GLSLWaveformRendererSignal::loadTexture() {
    TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
    ConstWaveformPointer waveform;
    int dataSize = 0;
    const WaveformData* data = NULL;

    if (trackInfo) {
        waveform = trackInfo->getWaveform();
        if (waveform) {
            dataSize = waveform->getDataSize();
            if (dataSize > 1) {
                data = waveform->data();
            }
        }
    }

    glEnable(GL_TEXTURE_2D);

    if (m_textureId == 0) {
        glGenTextures(1, &m_textureId);

        int error = glGetError();
        if (error)
            qDebug() << "GLSLWaveformRendererSignal::loadTexture - m_textureId" << m_textureId << "error" << error;
    }

    glBindTexture(GL_TEXTURE_2D, m_textureId);

    int error = glGetError();
    if (error)
        qDebug() << "GLSLWaveformRendererSignal::loadTexture - bind error" << error;

    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    if (waveform != NULL && data != NULL) {
        // Waveform ensures that getTextureSize is a multiple of
        // getTextureStride so there is no rounding here.
        int textureWidth = waveform->getTextureStride();
        int textureHeigth = waveform->getTextureSize() / waveform->getTextureStride();

        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, textureWidth, textureHeigth, 0,
                     GL_RGBA, GL_UNSIGNED_BYTE, data);
        int error = glGetError();
        if (error)
            qDebug() << "GLSLWaveformRendererSignal::loadTexture - glTexImage2D error" << error;
    } else {
        glDeleteTextures(1,&m_textureId);
        m_textureId = 0;
    }

    glDisable(GL_TEXTURE_2D);

    return true;
}

void GLWaveformRendererFilteredSignal::draw(QPainter* painter, QPaintEvent* /*event*/) {

    TrackPointer pTrack = m_waveformRenderer->getTrackInfo();
    if (!pTrack) {
        return;
    }

    ConstWaveformPointer waveform = pTrack->getWaveform();
    if (waveform.isNull()) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;

    const int firstIndex = int(firstVisualIndex+0.5);
    firstVisualIndex = firstIndex - firstIndex%2;

    const int lastIndex = int(lastVisualIndex+0.5);
    lastVisualIndex = lastIndex + lastIndex%2;

    // Reset device for native painting
    painter->beginNativePainting();

    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    // Per-band gain from the EQ knobs.
    float allGain(1.0), lowGain(1.0), midGain(1.0), highGain(1.0);
    getGains(&allGain, &lowGain, &midGain, &highGain);

    float maxLow[2];
    float maxMid[2];
    float maxHigh[2];
    float meanIndex;

    //  Removed Unsupported OpenGL functions, so that Mixxx can run on OpenGL-ES systems -- amvanbaren 9/2015
    //  TODO(XXX) Rewrite OpenGL code in glwaveformrendererfilteredsignal.cpp to support
    //  the new OpenGL syntax or use Qt instead

    painter->endNativePainting();
}

void AnalyzerWaveform::finalize(TrackPointer tio) {
    if (m_skipProcessing) {
        return;
    }

    // Force completion to waveform size
    if (m_waveform) {
        m_waveform->setSaveState(Waveform::SaveState::SavePending);
        m_waveform->setCompletion(m_waveform->getDataSize());
        m_waveform->setVersion(WaveformFactory::currentWaveformVersion());
        m_waveform->setDescription(WaveformFactory::currentWaveformDescription());
        // Since clear() could delete the waveform, clear our pointer to the
        // waveform's vector data first.
        m_waveformData = nullptr;
        m_waveform.clear();
    }

    // Force completion to waveform size
    if (m_waveformSummary) {
        m_waveformSummary->setSaveState(Waveform::SaveState::SavePending);
        m_waveformSummary->setCompletion(m_waveformSummary->getDataSize());
        m_waveformSummary->setVersion(WaveformFactory::currentWaveformSummaryVersion());
        m_waveformSummary->setDescription(WaveformFactory::currentWaveformSummaryDescription());
        // Since clear() could delete the waveform, clear our pointer to the
        // waveform's vector data first.
        m_waveformSummaryData = nullptr;
        m_waveformSummary.clear();
    }

#ifdef TEST_HEAT_MAP
    test_heatMap->save("heatMap.png");
#endif
    // Ensure that the analyses get saved. This is also called from
    // TrackDAO.updateTrack(), but it can happen that we analyze only the
    // waveforms (i.e. if the config setting was disabled in a previous scan)
    // and then it is not called. The other analyzers have signals which control
    // the update of their data.
    m_pAnalysisDao->saveTrackAnalyses(
            tio->getId(),
            tio->getWaveform(),
            tio->getWaveformSummary());

    kLogger.debug() << "Waveform generation for track" << tio->getId() << "done"
             << m_timer.elapsed().debugSecondsWithUnit();
}

void GLWaveformRendererSimpleSignal::draw(QPainter* painter, QPaintEvent* /*event*/) {
    TrackPointer pTrack = m_waveformRenderer->getTrackInfo();
    if (!pTrack) {
        return;
    }

    ConstWaveformPointer waveform = pTrack->getWaveform();
    if (waveform.isNull()) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;
    double lineWidth = (1.0 / m_waveformRenderer->getVisualSamplePerPixel()) + 1.0;

    const int firstIndex = int(firstVisualIndex+0.5);
    firstVisualIndex = firstIndex - firstIndex%2;

    const int lastIndex = int(lastVisualIndex+0.5);
    lastVisualIndex = lastIndex + lastIndex%2;

    // Reset device for native painting
    painter->beginNativePainting();

    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    float allGain(1.0);
    getGains(&allGain, NULL, NULL, NULL);

    if (m_alignment == Qt::AlignCenter) {
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();
        if (m_orientation == Qt::Vertical) {
            glRotatef(90.0f, 0.0f, 0.0f, 1.0f);
            glScalef(-1.0f, 1.0f, 1.0f);
        }
        glOrtho(firstVisualIndex, lastVisualIndex, -255.0, 255.0, -10.0, 10.0);

        glMatrixMode(GL_MODELVIEW);
        glPushMatrix();
        glLoadIdentity();

        glScalef(1.f, allGain, 1.f);

        glLineWidth(1.0);
        glDisable(GL_LINE_SMOOTH);

        //draw reference line
        glBegin(GL_LINES); {
            glColor4f(m_axesColor_r, m_axesColor_g,
                      m_axesColor_b, m_axesColor_a);
            glVertex2f(firstVisualIndex,0);
            glVertex2f(lastVisualIndex,0);
        }
        glEnd();

        glLineWidth(lineWidth);
        glEnable(GL_LINE_SMOOTH);

        glBegin(GL_LINES); {
            int firstIndex = math_max(static_cast<int>(firstVisualIndex), 0);
            int lastIndex = math_min(static_cast<int>(lastVisualIndex), dataSize);

            glColor4f(m_signalColor_r, m_signalColor_g, m_signalColor_b, 0.9);
            for (int visualIndex = firstIndex;
                    visualIndex < lastIndex;
                    visualIndex += 2) {

                GLfloat maxAll0 = data[visualIndex].filtered.all;
                GLfloat maxAll1 = data[visualIndex+1].filtered.all;
                glVertex2f(visualIndex, maxAll0);
                glVertex2f(visualIndex, -1.f * maxAll1);
            }
        }
        glEnd();
    } else { //top || bottom
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();
        if (m_orientation == Qt::Vertical) {
            glRotatef(90.0f, 0.0f, 0.0f, 1.0f);
            glScalef(-1.0f, 1.0f, 1.0f);
        }
        if (m_alignment == Qt::AlignBottom || m_alignment == Qt::AlignRight)
            glOrtho(firstVisualIndex, lastVisualIndex, 0.0, 255.0, -10.0, 10.0);
        else
            glOrtho(firstVisualIndex, lastVisualIndex, 255.0, 0.0, -10.0, 10.0);

//.........这里部分代码省略.........

void QtWaveformRendererSimpleSignal::draw(QPainter* painter, QPaintEvent* /*event*/){

    TrackPointer pTrack = m_waveformRenderer->getTrackInfo();
    if (!pTrack) {
        return;
    }

    const Waveform* waveform = pTrack->getWaveform();
    if (waveform == NULL) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    painter->save();

    painter->setRenderHint(QPainter::Antialiasing);
    painter->resetTransform();

    float allGain(1.0);
    getGains(&allGain, NULL, NULL, NULL);

    double heightGain = allGain * (double)m_waveformRenderer->getHeight()/255.0;
    if (m_alignment == Qt::AlignTop) {
        painter->translate(0.0, 0.0);
        painter->scale(1.0, heightGain);
    } else if (m_alignment == Qt::AlignBottom) {
        painter->translate(0.0, m_waveformRenderer->getHeight());
        painter->scale(1.0, heightGain);
    } else {
        painter->translate(0.0, m_waveformRenderer->getHeight()/2.0);
        painter->scale(1.0, 0.5*heightGain);
    }

    //draw reference line
    if (m_alignment == Qt::AlignCenter) {
        painter->setPen(m_pColors->getAxesColor());
        painter->drawLine(0,0,m_waveformRenderer->getWidth(),0);
    }

    const double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    const double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;
    m_polygon.clear();
    m_polygon.reserve(2 * m_waveformRenderer->getWidth() + 2);
    m_polygon.append(QPointF(0.0, 0.0));

    const double offset = firstVisualIndex;

    // Represents the # of waveform data points per horizontal pixel.
    const double gain = (lastVisualIndex - firstVisualIndex) /
            (double)m_waveformRenderer->getWidth();

    //NOTE(vrince) Please help me find a better name for "channelSeparation"
    //this variable stand for merged channel ... 1 = merged & 2 = separated
    int channelSeparation = 2;
    if (m_alignment != Qt::AlignCenter)
        channelSeparation = 1;

    for (int channel = 0; channel < channelSeparation; ++channel) {
        int startPixel = 0;
        int endPixel = m_waveformRenderer->getWidth() - 1;
        int delta = 1;
        double direction = 1.0;

        //Reverse display for merged bottom channel
        if (m_alignment == Qt::AlignBottom)
            direction = -1.0;

        if (channel == 1) {
            startPixel = m_waveformRenderer->getWidth() - 1;
            endPixel = 0;
            delta = -1;
            direction = -1.0;

            // After preparing the first channel, insert the pivot point.
            m_polygon.append(QPointF(m_waveformRenderer->getWidth(), 0.0));
        }

        for (int x = startPixel;
                (startPixel < endPixel) ? (x <= endPixel) : (x >= endPixel);
                x += delta) {

            // TODO(rryan) remove before 1.11 release. I'm seeing crashes
            // sometimes where the pointIndex is very very large. It hasn't come
            // back since adding locking, but I'm leaving this so that we can
            // get some info about it before crashing. (The crash usually
            // corrupts a lot of the stack).
            if (m_polygon.size() > 2 * m_waveformRenderer->getWidth() + 2) {
                qDebug() << "OUT OF CONTROL"
                         << 2 * m_waveformRenderer->getWidth() + 2
                         << dataSize
                         << channel << m_polygon.size() << x;
//.........这里部分代码省略.........

int QtWaveformRendererFilteredSignal::buildPolygon() {
    // We have to check the track is present because it might have been unloaded
    // between the call to draw and the call to buildPolygon
    TrackPointer pTrack = m_waveformRenderer->getTrackInfo();
    if (!pTrack) {
        return 0;
    }

    const Waveform* waveform = pTrack->getWaveform();
    if (waveform == NULL) {
        return 0;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return 0;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return 0;
    }

    const double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    const double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;

    m_polygon[0].clear();
    m_polygon[1].clear();
    m_polygon[2].clear();

    m_polygon[0].reserve(2 * m_waveformRenderer->getWidth() + 2);
    m_polygon[1].reserve(2 * m_waveformRenderer->getWidth() + 2);
    m_polygon[2].reserve(2 * m_waveformRenderer->getWidth() + 2);

    QPointF point(0.0, 0.0);
    m_polygon[0].append(point);
    m_polygon[1].append(point);
    m_polygon[2].append(point);

    const double offset = firstVisualIndex;

    // Represents the # of waveform data points per horizontal pixel.
    const double gain = (lastVisualIndex - firstVisualIndex) /
            (double)m_waveformRenderer->getWidth();

    float lowGain(1.0), midGain(1.0), highGain(1.0);
    getGains(NULL, &lowGain, &midGain, &highGain);

    //NOTE(vrince) Please help me find a better name for "channelSeparation"
    //this variable stand for merged channel ... 1 = merged & 2 = separated
    int channelSeparation = 2;
    if (m_alignment != Qt::AlignCenter)
        channelSeparation = 1;

    for (int channel = 0; channel < channelSeparation; ++channel) {
        int startPixel = 0;
        int endPixel = m_waveformRenderer->getWidth() - 1;
        int delta = 1;
        double direction = 1.0;

        //Reverse display for merged bottom channel
        if (m_alignment == Qt::AlignBottom)
            direction = -1.0;

        if (channel == 1) {
            startPixel = m_waveformRenderer->getWidth() - 1;
            endPixel = 0;
            delta = -1;
            direction = -1.0;

            // After preparing the first channel, insert the pivot point.
            point = QPointF(m_waveformRenderer->getWidth(), 0.0);
            m_polygon[0].append(point);
            m_polygon[1].append(point);
            m_polygon[2].append(point);
        }

        for (int x = startPixel;
                (startPixel < endPixel) ? (x <= endPixel) : (x >= endPixel);
                x += delta) {

            // TODO(rryan) remove before 1.11 release. I'm seeing crashes
            // sometimes where the pointIndex is very very large. It hasn't come
            // back since adding locking, but I'm leaving this so that we can
            // get some info about it before crashing. (The crash usually
            // corrupts a lot of the stack).
            if (m_polygon[0].size() > 2 * m_waveformRenderer->getWidth() + 2) {
                qDebug() << "OUT OF CONTROL"
                         << 2 * m_waveformRenderer->getWidth() + 2
                         << dataSize
                         << channel << m_polygon[0].size() << x;
            }

            // Width of the x position in visual indices.
            const double xSampleWidth = gain * x;

            // Effective visual index of x
            const double xVisualSampleIndex = xSampleWidth + offset;

            // Our current pixel (x) corresponds to a number of visual samples
//.........这里部分代码省略.........

void WaveformRendererHSV::draw(QPainter* painter,
                                          QPaintEvent* /*event*/) {
    const TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
    if (!trackInfo) {
        return;
    }

    ConstWaveformPointer waveform = trackInfo->getWaveform();
    if (waveform.isNull()) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    painter->save();
    painter->setRenderHints(QPainter::Antialiasing, false);
    painter->setRenderHints(QPainter::HighQualityAntialiasing, false);
    painter->setRenderHints(QPainter::SmoothPixmapTransform, false);
    painter->setWorldMatrixEnabled(false);
    painter->resetTransform();

    // Rotate if drawing vertical waveforms
    if (m_waveformRenderer->getOrientation() == Qt::Vertical) {
        painter->setTransform(QTransform(0, 1, 1, 0, 0, 0));
    }

    const double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    const double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;

    const double offset = firstVisualIndex;

    // Represents the # of waveform data points per horizontal pixel.
    const double gain = (lastVisualIndex - firstVisualIndex) /
            (double)m_waveformRenderer->getLength();

    float allGain(1.0);
    getGains(&allGain, NULL, NULL, NULL);

    // Save HSV of waveform color. NOTE(rryan): On ARM, qreal is float so it's
    // important we use qreal here and not double or float or else we will get
    // build failures on ARM.
    qreal h, s, v;

    // Get base color of waveform in the HSV format (s and v isn't use)
    m_pColors->getLowColor().getHsvF(&h, &s, &v);

    QColor color;
    float lo, hi, total;

    const int breadth = m_waveformRenderer->getBreadth();
    const float halfBreadth = (float)breadth / 2.0;

    const float heightFactor = allGain * halfBreadth / 255.0;

    //draw reference line
    painter->setPen(m_pColors->getAxesColor());
    painter->drawLine(0, halfBreadth, m_waveformRenderer->getLength(), halfBreadth);

    for (int x = 0; x < m_waveformRenderer->getLength(); ++x) {
        // Width of the x position in visual indices.
        const double xSampleWidth = gain * x;

        // Effective visual index of x
        const double xVisualSampleIndex = xSampleWidth + offset;

        // Our current pixel (x) corresponds to a number of visual samples
        // (visualSamplerPerPixel) in our waveform object. We take the max of
        // all the data points on either side of xVisualSampleIndex within a
        // window of 'maxSamplingRange' visual samples to measure the maximum
        // data point contained by this pixel.
        double maxSamplingRange = gain / 2.0;

        // Since xVisualSampleIndex is in visual-samples (e.g. R,L,R,L) we want
        // to check +/- maxSamplingRange frames, not samples. To do this, divide
        // xVisualSampleIndex by 2. Since frames indices are integers, we round
        // to the nearest integer by adding 0.5 before casting to int.
        int visualFrameStart = int(xVisualSampleIndex / 2.0 - maxSamplingRange + 0.5);
        int visualFrameStop = int(xVisualSampleIndex / 2.0 + maxSamplingRange + 0.5);
        const int lastVisualFrame = dataSize / 2 - 1;

        // We now know that some subset of [visualFrameStart, visualFrameStop]
        // lies within the valid range of visual frames. Clamp
        // visualFrameStart/Stop to within [0, lastVisualFrame].
        visualFrameStart = math_clamp(visualFrameStart, 0, lastVisualFrame);
        visualFrameStop = math_clamp(visualFrameStop, 0, lastVisualFrame);

        int visualIndexStart = visualFrameStart * 2;
        int visualIndexStop = visualFrameStop * 2;

        int maxLow[2] = {0, 0};
        int maxHigh[2] = {0, 0};
        int maxMid[2] = {0, 0};
//.........这里部分代码省略.........

void GLWaveformRendererFilteredSignal::draw(QPainter* painter, QPaintEvent* /*event*/) {

    TrackPointer pTrack = m_waveformRenderer->getTrackInfo();
    if (!pTrack) {
        return;
    }

    ConstWaveformPointer waveform = pTrack->getWaveform();
    if (waveform.isNull()) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;
    const double lineWidth = (1.0 / m_waveformRenderer->getVisualSamplePerPixel()) + 1.0;

    const int firstIndex = int(firstVisualIndex+0.5);
    firstVisualIndex = firstIndex - firstIndex%2;

    const int lastIndex = int(lastVisualIndex+0.5);
    lastVisualIndex = lastIndex + lastIndex%2;

    // Reset device for native painting
    painter->beginNativePainting();

    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    // Per-band gain from the EQ knobs.
    float allGain(1.0), lowGain(1.0), midGain(1.0), highGain(1.0);
    getGains(&allGain, &lowGain, &midGain, &highGain);

#ifndef __OPENGLES__

    if (m_alignment == Qt::AlignCenter) {
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();
        if (m_orientation == Qt::Vertical) {
            glRotatef(90.0f, 0.0f, 0.0f, 1.0f);
            glScalef(-1.0f, 1.0f, 1.0f);
        }
        glOrtho(firstVisualIndex, lastVisualIndex, -255.0, 255.0, -10.0, 10.0);

        glMatrixMode(GL_MODELVIEW);
        glPushMatrix();
        glLoadIdentity();

        glScalef(1.f,allGain,1.f);

        glLineWidth(1.0);
        glDisable(GL_LINE_SMOOTH);

        //draw reference line
        glBegin(GL_LINES); {
            glColor4f(m_axesColor_r, m_axesColor_g,
                      m_axesColor_b, m_axesColor_a);
            glVertex2f(firstVisualIndex,0);
            glVertex2f(lastVisualIndex,0);
        }
        glEnd();

        glLineWidth(lineWidth);
        glEnable(GL_LINE_SMOOTH);

        glBegin(GL_LINES); {

            int firstIndex = math_max(static_cast<int>(firstVisualIndex), 0);
            int lastIndex = math_min(static_cast<int>(lastVisualIndex), dataSize);

            glColor4f(m_lowColor_r, m_lowColor_g, m_lowColor_b, 0.8);
            for (int visualIndex = firstIndex;
                    visualIndex < lastIndex;
                    visualIndex += 2) {

                GLfloat maxLow0 = data[visualIndex].filtered.low;
                GLfloat maxLow1 = data[visualIndex+1].filtered.low;

                glVertex2f(visualIndex,lowGain*maxLow0);
                glVertex2f(visualIndex,-1.f*lowGain*maxLow1);
            }

            glColor4f(m_midColor_r, m_midColor_g, m_midColor_b, 0.85);
            for (int visualIndex = firstIndex;
                    visualIndex < lastIndex;
                    visualIndex += 2) {

                GLfloat maxMid0 = data[visualIndex].filtered.mid;
                GLfloat maxMid1 = data[visualIndex+1].filtered.mid;

//.........这里部分代码省略.........

void WaveformRendererFilteredSignal::draw(QPainter* painter,
                                          QPaintEvent* /*event*/) {
    const TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
    if (!trackInfo) {
        return;
    }

    const Waveform* waveform = trackInfo->getWaveform();
    if (waveform == NULL) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    painter->save();
    painter->setRenderHints(QPainter::Antialiasing, false);
    painter->setRenderHints(QPainter::HighQualityAntialiasing, false);
    painter->setRenderHints(QPainter::SmoothPixmapTransform, false);
    painter->setWorldMatrixEnabled(false);
    painter->resetTransform();

    const double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    const double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;

    // Represents the # of waveform data points per horizontal pixel.
    const double gain = (lastVisualIndex - firstVisualIndex) /
            (double)m_waveformRenderer->getWidth();

    // Per-band gain from the EQ knobs.
    float allGain(1.0), lowGain(1.0), midGain(1.0), highGain(1.0);
    getGains(&allGain, &lowGain, &midGain, &highGain);

    const float halfHeight = (float)m_waveformRenderer->getHeight()/2.0;

    const float heightFactor = m_alignment == Qt::AlignCenter
            ? allGain*halfHeight/255.0
            : allGain*m_waveformRenderer->getHeight()/255.0;

    //draw reference line
    if (m_alignment == Qt::AlignCenter) {
        painter->setPen(m_pColors->getAxesColor());
        painter->drawLine(0,halfHeight,m_waveformRenderer->getWidth(),halfHeight);
    }

    int actualLowLineNumber = 0;
    int actualMidLineNumber = 0;
    int actualHighLineNumber = 0;

    for (int x = 0; x < m_waveformRenderer->getWidth(); ++x) {
        // Width of the x position in visual indices.
        const double xSampleWidth = gain * x;

        // Effective visual index of x
        const double xVisualSampleIndex = xSampleWidth + firstVisualIndex;

        // Our current pixel (x) corresponds to a number of visual samples
        // (visualSamplerPerPixel) in our waveform object. We take the max of
        // all the data points on either side of xVisualSampleIndex within a
        // window of 'maxSamplingRange' visual samples to measure the maximum
        // data point contained by this pixel.
        double maxSamplingRange = gain / 2.0;

        // Since xVisualSampleIndex is in visual-samples (e.g. R,L,R,L) we want
        // to check +/- maxSamplingRange frames, not samples. To do this, divide
        // xVisualSampleIndex by 2. Since frames indices are integers, we round
        // to the nearest integer by adding 0.5 before casting to int.
        int visualFrameStart = int(xVisualSampleIndex / 2.0 - maxSamplingRange + 0.5);
        int visualFrameStop = int(xVisualSampleIndex / 2.0 + maxSamplingRange + 0.5);

        // If the entire sample range is off the screen then don't calculate a
        // point for this pixel.
        const int lastVisualFrame = dataSize / 2 - 1;
        if (visualFrameStop < 0 || visualFrameStart > lastVisualFrame) {
            continue;
        }

        // We now know that some subset of [visualFrameStart, visualFrameStop]
        // lies within the valid range of visual frames. Clamp
        // visualFrameStart/Stop to within [0, lastVisualFrame].
        visualFrameStart = math_clamp(visualFrameStart, 0, lastVisualFrame);
        visualFrameStop = math_clamp(visualFrameStop, 0, lastVisualFrame);

        int visualIndexStart = visualFrameStart * 2;
        int visualIndexStop = visualFrameStop * 2;

        // if (x == m_waveformRenderer->getWidth() / 2) {
        //     qDebug() << "audioVisualRatio" << waveform->getAudioVisualRatio();
        //     qDebug() << "visualSampleRate" << waveform->getVisualSampleRate();
        //     qDebug() << "audioSamplesPerVisualPixel" << waveform->getAudioSamplesPerVisualSample();
        //     qDebug() << "visualSamplePerPixel" << visualSamplePerPixel;
        //     qDebug() << "xSampleWidth" << xSampleWidth;
        //     qDebug() << "xVisualSampleIndex" << xVisualSampleIndex;
//.........这里部分代码省略.........

void GLSLWaveformRendererSignal::draw(QPainter* painter, QPaintEvent* /*event*/) {
    if (!m_frameBuffersValid || !m_shadersValid) {
        return;
    }

    TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
    if (!trackInfo) {
        return;
    }

    ConstWaveformPointer waveform = trackInfo->getWaveform();
    if (waveform.isNull()) {
        return;
    }

    int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    // save the GL state set for QPainter
    painter->beginNativePainting();

    //NOTE: (vRince) completion can change during loadTexture
    //do not remove currenCompletion temp variable !
    const int currentCompletion = waveform->getCompletion();
    if (m_loadedWaveform < currentCompletion) {
        loadTexture();
        m_loadedWaveform = currentCompletion;
    }

    // Per-band gain from the EQ knobs.
    float lowGain(1.0), midGain(1.0), highGain(1.0), allGain(1.0);
    getGains(&allGain, &lowGain, &midGain, &highGain);

    double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize/2.0;
    double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize/2.0;

    // const int firstIndex = int(firstVisualIndex+0.5);
    // firstVisualIndex = firstIndex - firstIndex%2;

    // const int lastIndex = int(lastVisualIndex+0.5);
    // lastVisualIndex = lastIndex + lastIndex%2;

    //qDebug() << "GAIN" << allGain << lowGain << midGain << highGain;

    //paint into frame buffer
    {
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();
        glOrtho(firstVisualIndex, lastVisualIndex, -1.0, 1.0, -10.0, 10.0);

        glMatrixMode(GL_MODELVIEW);
        glPushMatrix();
        glLoadIdentity();
        glTranslatef(.0f,.0f,.0f);

        m_frameShaderProgram->bind();

        glViewport(0, 0, m_framebuffer->width(), m_framebuffer->height());

        m_frameShaderProgram->setUniformValue("framebufferSize", QVector2D(
            m_framebuffer->width(), m_framebuffer->height()));
        m_frameShaderProgram->setUniformValue("waveformLength", dataSize);
        m_frameShaderProgram->setUniformValue("textureSize", waveform->getTextureSize());
        m_frameShaderProgram->setUniformValue("textureStride", waveform->getTextureStride());

        m_frameShaderProgram->setUniformValue("firstVisualIndex", (float)firstVisualIndex);
        m_frameShaderProgram->setUniformValue("lastVisualIndex", (float)lastVisualIndex);

        m_frameShaderProgram->setUniformValue("allGain", allGain);
        m_frameShaderProgram->setUniformValue("lowGain", lowGain);
        m_frameShaderProgram->setUniformValue("midGain", midGain);
        m_frameShaderProgram->setUniformValue("highGain", highGain);

        m_frameShaderProgram->setUniformValue("axesColor", QVector4D(m_axesColor_r, m_axesColor_g,
                                                                     m_axesColor_b, m_axesColor_a));

        QVector4D lowColor = m_rgbShader ?
                QVector4D(m_rgbLowColor_r, m_rgbLowColor_g, m_rgbLowColor_b, 1.0) :
                QVector4D(m_lowColor_r, m_lowColor_g, m_lowColor_b, 1.0);
        QVector4D midColor = m_rgbShader ?
                QVector4D(m_rgbMidColor_r, m_rgbMidColor_g, m_rgbMidColor_b, 1.0) :
                QVector4D(m_midColor_r, m_midColor_g, m_midColor_b, 1.0);
        QVector4D highColor = m_rgbShader ?
                QVector4D(m_rgbHighColor_r, m_rgbHighColor_g, m_rgbHighColor_b, 1.0) :
                QVector4D(m_highColor_r, m_highColor_g, m_highColor_b, 1.0);
        m_frameShaderProgram->setUniformValue("lowColor", lowColor);
        m_frameShaderProgram->setUniformValue("midColor", midColor);
        m_frameShaderProgram->setUniformValue("highColor", highColor);

        glEnable(GL_TEXTURE_2D);
        glBindTexture(GL_TEXTURE_2D, m_textureId);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
//.........这里部分代码省略.........

void WaveformRendererRGB::draw(QPainter* painter,
                                          QPaintEvent* /*event*/) {
    const TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
    if (!trackInfo) {
        return;
    }

    const Waveform* waveform = trackInfo->getWaveform();
    if (waveform == NULL) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    painter->save();
    painter->setRenderHints(QPainter::Antialiasing, false);
    painter->setRenderHints(QPainter::HighQualityAntialiasing, false);
    painter->setRenderHints(QPainter::SmoothPixmapTransform, false);
    painter->setWorldMatrixEnabled(false);
    painter->resetTransform();

    const double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    const double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;

    const double offset = firstVisualIndex;

    // Represents the # of waveform data points per horizontal pixel.
    const double gain = (lastVisualIndex - firstVisualIndex) /
            (double)m_waveformRenderer->getWidth();

    float allGain(1.0);
    getGains(&allGain, NULL, NULL, NULL);

    QColor color;

    const float halfHeight = (float)m_waveformRenderer->getHeight()/2.0;

    const float heightFactor = allGain*halfHeight/255.0;

    // Draw reference line
    painter->setPen(m_pColors->getAxesColor());
    painter->drawLine(0,halfHeight,m_waveformRenderer->getWidth(),halfHeight);

    for (int x = 0; x < m_waveformRenderer->getWidth(); ++x) {
        // Width of the x position in visual indices.
        const double xSampleWidth = gain * x;

        // Effective visual index of x
        const double xVisualSampleIndex = xSampleWidth + offset;

        // Our current pixel (x) corresponds to a number of visual samples
        // (visualSamplerPerPixel) in our waveform object. We take the max of
        // all the data points on either side of xVisualSampleIndex within a
        // window of 'maxSamplingRange' visual samples to measure the maximum
        // data point contained by this pixel.
        double maxSamplingRange = gain / 2.0;

        // Since xVisualSampleIndex is in visual-samples (e.g. R,L,R,L) we want
        // to check +/- maxSamplingRange frames, not samples. To do this, divide
        // xVisualSampleIndex by 2. Since frames indices are integers, we round
        // to the nearest integer by adding 0.5 before casting to int.
        int visualFrameStart = int(xVisualSampleIndex / 2.0 - maxSamplingRange + 0.5);
        int visualFrameStop = int(xVisualSampleIndex / 2.0 + maxSamplingRange + 0.5);
        const int lastVisualFrame = dataSize / 2 - 1;

        // We now know that some subset of [visualFrameStart, visualFrameStop]
        // lies within the valid range of visual frames. Clamp
        // visualFrameStart/Stop to within [0, lastVisualFrame].
        visualFrameStart = math_clamp(visualFrameStart, 0, lastVisualFrame);
        visualFrameStop = math_clamp(visualFrameStop, 0, lastVisualFrame);

        int visualIndexStart = visualFrameStart * 2;
        int visualIndexStop  = visualFrameStop * 2;

        unsigned char maxLow  = 0;
        unsigned char maxMid  = 0;
        unsigned char maxHigh = 0;
        unsigned char maxAllA = 0;
        unsigned char maxAllB = 0;

        for (int i = visualIndexStart;
             i >= 0 && i + 1 < dataSize && i + 1 <= visualIndexStop; i += 2) {
            const WaveformData& waveformData = *(data + i);
            const WaveformData& waveformDataNext = *(data + i + 1);

            maxLow  = math_max3(maxLow,  waveformData.filtered.low,  waveformDataNext.filtered.low);
            maxMid  = math_max3(maxMid,  waveformData.filtered.mid,  waveformDataNext.filtered.mid);
            maxHigh = math_max3(maxHigh, waveformData.filtered.high, waveformDataNext.filtered.high);
            maxAllA = math_max(maxAllA, waveformData.filtered.all);
            maxAllB = math_max(maxAllB, waveformDataNext.filtered.all);
        }

//.........这里部分代码省略.........

void GLWaveformRendererRGB::draw(QPainter* painter, QPaintEvent* /*event*/) {

    TrackPointer pTrack = m_waveformRenderer->getTrackInfo();
    if (!pTrack) {
        return;
    }

    const Waveform* waveform = pTrack->getWaveform();
    if (waveform == NULL) {
        return;
    }

    const int dataSize = waveform->getDataSize();
    if (dataSize <= 1) {
        return;
    }

    const WaveformData* data = waveform->data();
    if (data == NULL) {
        return;
    }

    double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
    double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;

    const int firstIndex = int(firstVisualIndex + 0.5);
    firstVisualIndex = firstIndex - firstIndex % 2;

    const int lastIndex = int(lastVisualIndex + 0.5);
    lastVisualIndex = lastIndex + lastIndex % 2;

    // Reset device for native painting
    painter->beginNativePainting();

    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    // Per-band gain from the EQ knobs.
    float allGain(1.0), lowGain(1.0), midGain(1.0), highGain(1.0);
    getGains(&allGain, &lowGain, &midGain, &highGain);

    if (m_alignment == Qt::AlignCenter) {
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();
        glOrtho(firstVisualIndex, lastVisualIndex, -255.0, 255.0, -10.0, 10.0);

        glMatrixMode(GL_MODELVIEW);
        glPushMatrix();
        glLoadIdentity();

        glScalef(1.0f, allGain, 1.0f);

        glLineWidth(1.2);
        glDisable(GL_LINE_SMOOTH);

        // Draw reference line
        glBegin(GL_LINES); {
            glColor4f(m_axesColor_r, m_axesColor_g, m_axesColor_b, m_axesColor_a);
            glVertex2f(firstVisualIndex, 0);
            glVertex2f(lastVisualIndex,  0);
        }
        glEnd();

        glLineWidth(1.2);
        glEnable(GL_LINE_SMOOTH);

        glBegin(GL_LINES); {
            for( int visualIndex = firstVisualIndex;
                 visualIndex < lastVisualIndex;
                 visualIndex += 2) {

                if( visualIndex < 0)
                    continue;

                if( visualIndex > dataSize - 1)
                    break;

                float left_low    = lowGain  * (float) data[visualIndex].filtered.low;
                float left_mid    = midGain  * (float) data[visualIndex].filtered.mid;
                float left_high   = highGain * (float) data[visualIndex].filtered.high;
                float left_all    = sqrtf(left_low * left_low + left_mid * left_mid + left_high * left_high);
                float left_red    = left_low  * m_lowColor.red()   + left_mid  * m_midColor.red()   + left_high  * m_highColor.red();
                float left_green  = left_low  * m_lowColor.green() + left_mid  * m_midColor.green() + left_high  * m_highColor.green();
                float left_blue   = left_low  * m_lowColor.blue()  + left_mid  * m_midColor.blue()  + left_high  * m_highColor.blue();
                float left_max    = math_max3(left_red, left_green, left_blue);
                if (left_max > 0.0f) {  // Prevent division by zero
                    glColor4f(left_red / left_max, left_green / left_max, left_blue / left_max, 0.8f);
                    glVertex2f(visualIndex, 0.0f);
                    glVertex2f(visualIndex, left_all);
                }

                float right_low   = lowGain  * (float) data[visualIndex+1].filtered.low;
                float right_mid   = midGain  * (float) data[visualIndex+1].filtered.mid;
                float right_high  = highGain * (float) data[visualIndex+1].filtered.high;
                float right_all   = sqrtf(right_low * right_low + right_mid * right_mid + right_high * right_high);
                float right_red   = right_low * m_lowColor.red()   + right_mid * m_midColor.red()   + right_high * m_highColor.red();
                float right_green = right_low * m_lowColor.green() + right_mid * m_midColor.green() + right_high * m_highColor.green();
                float right_blue  = right_low * m_lowColor.blue()  + right_mid * m_midColor.blue()  + right_high * m_highColor.blue();
                float right_max   = math_max3(right_red, right_green, right_blue);
//.........这里部分代码省略.........