C++ VideoOutput::GetImageRect方法代码示例

void SubtitleScreen::AddScaledImage(QImage &img, QRect &pos)
{
    VideoOutput *vo = m_player->GetVideoOutput();
    if (!vo)
        return;

    QRect scaled = vo->GetImageRect(pos);
    if (scaled.size() != pos.size())
    {
        img = img.scaled(scaled.width(), scaled.height(),
                         Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
    }

    MythPainter *osd_painter = vo->GetOSDPainter();
    MythImage* image = NULL;
    if (osd_painter)
         image = osd_painter->GetFormatImage();

    if (image)
    {
        image->Assign(img);
        MythUIImage *uiimage = new MythUIImage(this, "dvd_button");
        if (uiimage)
        {
            m_refreshArea = true;
            uiimage->SetImage(image);
            uiimage->SetArea(MythRect(scaled));
        }
    }
}

void BDOverlayScreen::DisplayBDOverlay(BDOverlay *overlay)
{
    if (!overlay || !m_player)
        return;

    if (!overlay->m_data)
    {
        m_overlayArea = overlay->m_position;
        SetArea(MythRect(m_overlayArea));
        DeleteAllChildren();
        m_overlayMap.clear();
        SetRedraw();
        LOG(VB_PLAYBACK, LOG_INFO, LOC +
            QString("Initialised Size: %1x%2 (%3+%4) Plane: %5 Pts: %6")
                .arg(overlay->m_position.width())
                .arg(overlay->m_position.height())
                .arg(overlay->m_position.left())
                .arg(overlay->m_position.top())
                .arg(overlay->m_plane)
                .arg(overlay->m_pts));
        BDOverlay::DeleteOverlay(overlay);
        return;
    }

    if (!m_overlayArea.isValid())
    {
        LOG(VB_GENERAL, LOG_ERR, LOC +
            "Error: Overlay image submitted before initialisation.");
    }

    VideoOutput *vo = m_player->GetVideoOutput();
    if (!vo)
        return;

    QRect   rect = overlay->m_position;
    QString hash = QString("%1+%2+%3x%4")
                    .arg(rect.left()).arg(rect.top())
                    .arg(rect.width()).arg(rect.height());

    // remove if we already have this overlay
    if (m_overlayMap.contains(hash))
    {
        LOG(VB_PLAYBACK, LOG_DEBUG, LOC + QString("Removing %1 (%2 left)")
            .arg(hash).arg(m_overlayMap.size()));
        MythUIImage *old = m_overlayMap.take(hash);
        DeleteChild(old);
    }

    // convert the overlay palette to ARGB
    uint32_t *origpalette = (uint32_t *)(overlay->m_palette);
    QVector<unsigned int> palette;
    for (int i = 0; i < 256; i++)
    {
        int y  = (origpalette[i] >> 0) & 0xff;
        int cr = (origpalette[i] >> 8) & 0xff;
        int cb = (origpalette[i] >> 16) & 0xff;
        int a  = (origpalette[i] >> 24) & 0xff;
        int r  = int(y + 1.4022 * (cr - 128));
        int b  = int(y + 1.7710 * (cb - 128));
        int g  = int(1.7047 * y - (0.1952 * b) - (0.5647 * r));
        if (r < 0) r = 0;
        if (g < 0) g = 0;
        if (b < 0) b = 0;
        if (r > 0xff) r = 0xff;
        if (g > 0xff) g = 0xff;
        if (b > 0xff) b = 0xff;
        palette.push_back((a << 24) | (r << 16) | (g << 8) | b);
    }

    // convert the image to QImage
    QImage img(rect.size(), QImage::Format_Indexed8);
    memcpy(img.bits(), overlay->m_data, rect.width() * rect.height());
    img.setColorTable(palette);
    img.convertToFormat(QImage::Format_ARGB32);

    // add to screen
    QRect scaled = vo->GetImageRect(rect);
    if (scaled.size() != rect.size())
    {
        img = img.scaled(scaled.width(), scaled.height(),
                         Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
    }

    MythPainter *osd_painter = vo->GetOSDPainter();
    MythImage* image = NULL;
    if (osd_painter)
         image = osd_painter->GetFormatImage();

    if (image)
    {
        image->Assign(img);
        MythUIImage *uiimage = new MythUIImage(this, "bdoverlay");
        if (uiimage)
        {
            uiimage->SetImage(image);
            uiimage->SetArea(MythRect(scaled));
            m_overlayMap.insert(hash, uiimage);
            LOG(VB_PLAYBACK, LOG_DEBUG, LOC + QString("Added %1 (%2 tot)")
                .arg(hash).arg(m_overlayMap.size()));
        }
//.........这里部分代码省略.........

void SubtitleScreen::DisplayAVSubtitles(void)
{
    if (!m_player || !m_subreader)
        return;

    AVSubtitles* subs = m_subreader->GetAVSubtitles();
    QMutexLocker lock(&(subs->lock));
    if (subs->buffers.empty() && (kDisplayAVSubtitle != m_subtitleType))
        return;

    VideoOutput    *videoOut = m_player->GetVideoOutput();
    VideoFrame *currentFrame = videoOut ? videoOut->GetLastShownFrame() : NULL;

    if (!currentFrame || !videoOut)
        return;

    float tmp = 0.0;
    QRect dummy;
    videoOut->GetOSDBounds(dummy, m_safeArea, tmp, tmp, tmp);

    while (!subs->buffers.empty())
    {
        const AVSubtitle subtitle = subs->buffers.front();
        if (subtitle.start_display_time > currentFrame->timecode)
            break;

        ClearDisplayedSubtitles();
        subs->buffers.pop_front();
        for (std::size_t i = 0; i < subtitle.num_rects; ++i)
        {
            AVSubtitleRect* rect = subtitle.rects[i];

            bool displaysub = true;
            if (subs->buffers.size() > 0 &&
                subs->buffers.front().end_display_time <
                currentFrame->timecode)
            {
                displaysub = false;
            }

            if (displaysub && rect->type == SUBTITLE_BITMAP)
            {
                // AVSubtitleRect's image data's not guaranteed to be 4 byte
                // aligned.

                QSize img_size(rect->w, rect->h);
                QRect img_rect(rect->x, rect->y, rect->w, rect->h);
                QRect display(rect->display_x, rect->display_y,
                              rect->display_w, rect->display_h);

                // XSUB and some DVD/DVB subs are based on the original video
                // size before the video was converted. We need to guess the
                // original size and allow for the difference

                int right  = rect->x + rect->w;
                int bottom = rect->y + rect->h;
                if (subs->fixPosition || (currentFrame->height < bottom) ||
                   (currentFrame->width  < right))
                {
                    int sd_height = 576;
                    if ((m_player->GetFrameRate() > 26.0f) && bottom <= 480)
                        sd_height = 480;
                    int height = ((currentFrame->height <= sd_height) &&
                                  (bottom <= sd_height)) ? sd_height :
                                 ((currentFrame->height <= 720) && bottom <= 720)
                                   ? 720 : 1080;
                    int width  = ((currentFrame->width  <= 720) &&
                                  (right <= 720)) ? 720 :
                                 ((currentFrame->width  <= 1280) &&
                                  (right <= 1280)) ? 1280 : 1920;
                    display = QRect(0, 0, width, height);
                }

                QRect scaled = videoOut->GetImageRect(img_rect, &display);
                QImage qImage(img_size, QImage::Format_ARGB32);
                for (int y = 0; y < rect->h; ++y)
                {
                    for (int x = 0; x < rect->w; ++x)
                    {
                        const uint8_t color = rect->pict.data[0][y*rect->pict.linesize[0] + x];
                        const uint32_t pixel = *((uint32_t*)rect->pict.data[1]+color);
                        qImage.setPixel(x, y, pixel);
                    }
                }

                if (scaled.size() != img_size)
                {
                    qImage = qImage.scaled(scaled.width(), scaled.height(),
                             Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
                }

                MythPainter *osd_painter = videoOut->GetOSDPainter();
                MythImage* image = NULL;
                if (osd_painter)
                   image = osd_painter->GetFormatImage();

                long long displayfor = subtitle.end_display_time -
                                       subtitle.start_display_time;
                if (displayfor == 0)
                    displayfor = 60000;
//.........这里部分代码省略.........