C++ VideoFrame::to方法代码示例

bool QPainterRenderer::preparePixmap(const VideoFrame &frame)
{
    DPTR_D(QPainterRenderer);
    // already locked in a larger scope of receive()
    QImage::Format imgfmt = frame.imageFormat();
    if (frame.constBits(0)) {
        d.video_frame = frame;
    } else {
        if (imgfmt == QImage::Format_Invalid) {
            d.video_frame = frame.to(VideoFormat::Format_RGB32);
            imgfmt = d.video_frame.imageFormat();
        } else {
            d.video_frame = frame.to(frame.pixelFormat());
        }
    }
    const bool swapRGB = (int)imgfmt < 0;
    if (swapRGB) {
        imgfmt = (QImage::Format)(-imgfmt);
    }
    // DO NOT use frameData().data() because it's temp ptr while d.image does not deep copy the data
    QImage image = QImage((uchar*)d.video_frame.constBits(), d.video_frame.width(), d.video_frame.height(), d.video_frame.bytesPerLine(), imgfmt);
    if (swapRGB)
        image = image.rgbSwapped();
    d.pixmap = QPixmap::fromImage(image);
    //Format_RGB32 is fast. see document
    return true;
}

VideoFrame VideoFrame::to(const VideoFormat &fmt, const QSize& dstSize, const QRectF& roi) const
{
    if (!isValid() || !constBits(0)) {// hw surface. map to host. only supports rgb packed formats now
        Q_D(const VideoFrame);
        const QVariant v = d->metadata.value(QStringLiteral("surface_interop"));
        if (!v.isValid())
            return VideoFrame();
        VideoSurfaceInteropPtr si = v.value<VideoSurfaceInteropPtr>();
        if (!si)
            return VideoFrame();
        VideoFrame f;
        f.setDisplayAspectRatio(displayAspectRatio());
        f.setTimestamp(timestamp());
        if (si->map(HostMemorySurface, fmt, &f)) {
            if ((!dstSize.isValid() ||dstSize == QSize(width(), height())) && (!roi.isValid() || roi == QRectF(0, 0, width(), height()))) //roi is not supported now
                return f;
            return f.to(fmt, dstSize, roi);
        }
        return VideoFrame();
    }
    const int w = dstSize.width() > 0 ? dstSize.width() : width();
    const int h = dstSize.height() > 0 ? dstSize.height() : height();
    if (fmt.pixelFormatFFmpeg() == pixelFormatFFmpeg()
            && w == width() && h == height()
            // TODO: roi check.
            )
        return *this;
    Q_D(const VideoFrame);
    ImageConverterSWS conv;
    conv.setInFormat(pixelFormatFFmpeg());
    conv.setOutFormat(fmt.pixelFormatFFmpeg());
    conv.setInSize(width(), height());
    conv.setOutSize(w, h);
    conv.setInRange(colorRange());
    if (!conv.convert(d->planes.constData(), d->line_sizes.constData())) {
        qWarning() << "VideoFrame::to error: " << format() << "=>" << fmt;
        return VideoFrame();
    }
    VideoFrame f(w, h, fmt, conv.outData());
    f.setBits(conv.outPlanes());
    f.setBytesPerLine(conv.outLineSizes());
    if (fmt.isRGB()) {
        f.setColorSpace(fmt.isPlanar() ? ColorSpace_GBR : ColorSpace_RGB);
    } else {
        f.setColorSpace(ColorSpace_Unknown);
    }
    // TODO: color range
    f.setTimestamp(timestamp());
    f.setDisplayAspectRatio(displayAspectRatio());
    f.d_ptr->metadata = d->metadata; // need metadata?
    return f;
}

VideoFrame VideoFrameConverter::convert(const VideoFrame &frame, int fffmt) const
{
    if (!frame.isValid() || fffmt == QTAV_PIX_FMT_C(NONE))
        return VideoFrame();
    if (!frame.constBits(0)) // hw surface
        return frame.to(VideoFormat::pixelFormatFromFFmpeg(fffmt));
    const VideoFormat format(frame.format());
    //if (fffmt == format.pixelFormatFFmpeg())
      //  return *this;
    if (!m_cvt) {
        m_cvt = new ImageConverterSWS();
    }
    m_cvt->setBrightness(m_eq[0]);
    m_cvt->setContrast(m_eq[1]);
    m_cvt->setSaturation(m_eq[2]);
    m_cvt->setInFormat(format.pixelFormatFFmpeg());
    m_cvt->setOutFormat(fffmt);
    m_cvt->setInSize(frame.width(), frame.height());
    m_cvt->setOutSize(frame.width(), frame.height());
    m_cvt->setInRange(frame.colorRange());
    const int pal = format.hasPalette();
    QVector<const uchar*> pitch(format.planeCount() + pal);
    QVector<int> stride(format.planeCount() + pal);
    for (int i = 0; i < format.planeCount(); ++i) {
        pitch[i] = frame.constBits(i);
        stride[i] = frame.bytesPerLine(i);
    }
    const QByteArray paldata(frame.metaData(QStringLiteral("pallete")).toByteArray());
    if (pal > 0) {
        pitch[1] = (const uchar*)paldata.constData();
        stride[1] = paldata.size();
    }
    if (!m_cvt->convert(pitch.constData(), stride.constData())) {
        return VideoFrame();
    }
    const VideoFormat fmt(fffmt);
    VideoFrame f(frame.width(), frame.height(), fmt, m_cvt->outData());
    f.setBits(m_cvt->outPlanes());
    f.setBytesPerLine(m_cvt->outLineSizes());
    f.setTimestamp(frame.timestamp());
    f.setDisplayAspectRatio(frame.displayAspectRatio());
    // metadata?
    if (fmt.isRGB()) {
        f.setColorSpace(fmt.isPlanar() ? ColorSpace_GBR : ColorSpace_RGB);
    } else {
        f.setColorSpace(ColorSpace_Unknown);
    }
    // TODO: color range
    return f;
}

VideoFrame VideoFrameConverter::convert(const VideoFrame &frame, int fffmt) const
{
    if (!frame.isValid() || fffmt == QTAV_PIX_FMT_C(NONE))
        return VideoFrame();
    if (!frame.bits(0)) // hw surface
        return frame.to(VideoFormat::pixelFormatFromFFmpeg(fffmt));
    const VideoFormat format(frame.format());
    //if (fffmt == format.pixelFormatFFmpeg())
    //  return *this;
    if (!m_cvt) {
        m_cvt = new ImageConverterSWS();
    }
    m_cvt->setBrightness(m_eq[0]);
    m_cvt->setContrast(m_eq[1]);
    m_cvt->setSaturation(m_eq[2]);
    m_cvt->setInFormat(format.pixelFormatFFmpeg());
    m_cvt->setOutFormat(fffmt);
    m_cvt->setInSize(frame.width(), frame.height());
    m_cvt->setOutSize(frame.width(), frame.height());
    QVector<const uchar*> pitch(format.planeCount());
    QVector<int> stride(format.planeCount());
    for (int i = 0; i < format.planeCount(); ++i) {
        pitch[i] = frame.bits(i);
        stride[i] = frame.bytesPerLine(i);
    }
    if (!m_cvt->convert(pitch.constData(), stride.constData())) {
        return VideoFrame();
    }
    const VideoFormat fmt(fffmt);
    VideoFrame f(m_cvt->outData(), frame.width(), frame.height(), fmt);
    f.setBits(m_cvt->outPlanes());
    f.setBytesPerLine(m_cvt->outLineSizes());
    f.setTimestamp(frame.timestamp());
    // metadata?
    if (fmt.isRGB()) {
        f.setColorSpace(fmt.isPlanar() ? ColorSpace_GBR : ColorSpace_RGB);
    } else {
        f.setColorSpace(ColorSpace_Unknow);
    }
    return f;
}

void* SurfaceInteropVAAPI::mapToHost(const VideoFormat &format, void *handle, int plane)
{
    Q_UNUSED(plane);
    VAImage image;
    static const unsigned int fcc[] = { VA_FOURCC_NV12, VA_FOURCC_YV12, VA_FOURCC_IYUV, 0};
    va_new_image(m_surface->vadisplay(), fcc, &image, m_surface->width(), m_surface->height());
    if (image.image_id == VA_INVALID_ID)
        return NULL;
    void *p_base;
    VA_ENSURE(vaGetImage(m_surface->vadisplay(), m_surface->get(), 0, 0, m_surface->width(), m_surface->height(), image.image_id), NULL);
    VA_ENSURE(vaMapBuffer(m_surface->vadisplay(), image.buf, &p_base), NULL); //TODO: destroy image before return
    VideoFormat::PixelFormat pixfmt = pixelFormatFromVA(image.format.fourcc);
    bool swap_uv = image.format.fourcc != VA_FOURCC_NV12;
    if (pixfmt == VideoFormat::Format_Invalid) {
        qWarning("unsupported vaapi pixel format: %#x", image.format.fourcc);
        VA_ENSURE(vaDestroyImage(m_surface->vadisplay(), image.image_id), NULL);
        return NULL;
    }
    const VideoFormat fmt(pixfmt);
    uint8_t *src[3];
    int pitch[3];
    for (int i = 0; i < fmt.planeCount(); ++i) {
        src[i] = (uint8_t*)p_base + image.offsets[i];
        pitch[i] = image.pitches[i];
    }
    VideoFrame frame = VideoFrame::fromGPU(fmt, frame_width, frame_height, m_surface->height(), src, pitch, true, swap_uv);
    if (format != fmt)
        frame = frame.to(format);
    VAWARN(vaUnmapBuffer(m_surface->vadisplay(), image.buf));
    VAWARN(vaDestroyImage(m_surface->vadisplay(), image.image_id));
    image.image_id = VA_INVALID_ID;
    VideoFrame *f = reinterpret_cast<VideoFrame*>(handle);
    frame.setTimestamp(f->timestamp());
    *f = frame;
    return f;
}

bool VideoEncoderFFmpeg::encode(const VideoFrame &frame)
{
    DPTR_D(VideoEncoderFFmpeg);
    QScopedPointer<AVFrame, ScopedAVFrameDeleter> f;
    // hwupload
    AVPixelFormat pixfmt = AVPixelFormat(frame.pixelFormatFFmpeg());
    if (frame.isValid()) {
        f.reset(av_frame_alloc());
        f->format = pixfmt;
        f->width = frame.width();
        f->height = frame.height();
//        f->quality = d.avctx->global_quality;
        switch (timestampMode()) {
        case TimestampCopy:
            f->pts = int64_t(frame.timestamp()*frameRate()); // TODO: check monotically increase and fix if not. or another mode?
            break;
        case TimestampMonotonic:
            f->pts = d.nb_encoded+1;
            break;
        default:
            break;
        }

        // pts is set in muxer
        const int nb_planes = frame.planeCount();
        for (int i = 0; i < nb_planes; ++i) {
            f->linesize[i] = frame.bytesPerLine(i);
            f->data[i] = (uint8_t*)frame.constBits(i);
        }
        if (d.avctx->width <= 0) {
            d.avctx->width = frame.width();
        }
        if (d.avctx->height <= 0) {
            d.avctx->height = frame.width();
        }
#ifdef HAVE_AVHWCTX
        if (d.avctx->hw_frames_ctx) {
            // TODO: try to map to SourceSurface
            // checl valid sw_formats
            if (!d.hwframes_ref) {
                qWarning("no hw frame context for uploading");
                return false;
            }
            if (pixfmt != d.hwframes->sw_format) {
                // reinit or got an unsupported format. assume parameters will not change, so it's  the 1st init
                // check constraints
                bool init_frames_ctx = d.hwframes->sw_format == AVPixelFormat(-1);
                if (d.sw_fmts.contains(pixfmt)) { // format changed
                    init_frames_ctx = true;
                } else { // convert to supported sw format
                    pixfmt = d.sw_fmts[0];
                    f->format = pixfmt;
                    VideoFrame converted = frame.to(VideoFormat::pixelFormatFromFFmpeg(pixfmt));
                    for (int i = 0; i < converted.planeCount(); ++i) {
                        f->linesize[i] = converted.bytesPerLine(i);
                        f->data[i] = (uint8_t*)frame.constBits(i);
                    }
                }
                if (init_frames_ctx) {
                    d.hwframes->sw_format = pixfmt;
                    d.hwframes->width = frame.width();
                    d.hwframes->height = frame.height();
                    AV_ENSURE(av_hwframe_ctx_init(d.hwframes_ref), false);
                }
            }
            // upload
            QScopedPointer<AVFrame, ScopedAVFrameDeleter> hwf( av_frame_alloc());
            AV_ENSURE(av_hwframe_get_buffer(d.hwframes_ref, hwf.data(), 0), false);
            //hwf->format = d.hwframes->format; // not necessary
            //hwf->width = f->width;
            //hwf->height = f->height;
            AV_ENSURE(av_hwframe_transfer_data(hwf.data(), f.data(), 0), false);
            AV_ENSURE(av_frame_copy_props(hwf.data(), f.data()), false);
            av_frame_unref(f.data());
            av_frame_move_ref(f.data(), hwf.data());
        }
#endif //HAVE_AVHWCTX
    }
    AVPacket pkt;
    av_init_packet(&pkt);
    pkt.data = (uint8_t*)d.buffer.constData();
    pkt.size = d.buffer.size();
    int got_packet = 0;
    int ret = avcodec_encode_video2(d.avctx, &pkt, f.data(), &got_packet);
    if (ret < 0) {
        qWarning("error avcodec_encode_video2: %s" ,av_err2str(ret));
        return false; //false
    }
    d.nb_encoded++;
    if (!got_packet) {
        qWarning("no packet got");
        d.packet = Packet();
        // invalid frame means eof
        return frame.isValid();
    }
   // qDebug("enc avpkt.pts: %lld, dts: %lld.", pkt.pts, pkt.dts);
    d.packet = Packet::fromAVPacket(&pkt, av_q2d(d.avctx->time_base));
   // qDebug("enc packet.pts: %.3f, dts: %.3f.", d.packet.pts, d.packet.dts);
    return true;
}