C++ VideoFrame::setBytesPerLine方法代码示例

VideoFrame VideoDecoderFFmpegHW::copyToFrame(const VideoFormat& fmt, int surface_h, quint8 *src[], int pitch[], bool swapUV)
{
    DPTR_D(VideoDecoderFFmpegHW);
    Q_ASSERT_X(src[0] && pitch[0] > 0, "VideoDecoderFFmpegHW::copyToFrame", "src[0] and pitch[0] must be set");
    const int nb_planes = fmt.planeCount();
    const int chroma_pitch = nb_planes > 1 ? fmt.bytesPerLine(pitch[0], 1) : 0;
    const int chroma_h = fmt.chromaHeight(surface_h);
    int h[] = { surface_h, 0, 0};
    for (int i = 1; i < nb_planes; ++i) {
        h[i] = chroma_h;
        // set chroma address and pitch if not set
        if (pitch[i] <= 0)
            pitch[i] = chroma_pitch;
        if (!src[i])
            src[i] = src[i-1] + pitch[i-1]*h[i-1];
    }
    if (swapUV) {
        std::swap(src[1], src[2]);
        std::swap(pitch[1], pitch[2]);
    }
    VideoFrame frame;
    if (copyMode() == VideoDecoderFFmpegHW::OptimizedCopy && d.gpu_mem.isReady()) {
        int yuv_size = 0;
        for (int i = 0; i < nb_planes; ++i) {
            yuv_size += pitch[i]*h[i];
        }
        // additional 15 bytes to ensure 16 bytes aligned
        QByteArray buf(15 + yuv_size, 0);
        const int offset_16 = (16 - ((uintptr_t)buf.data() & 0x0f)) & 0x0f;
        // plane 1, 2... is aligned?
        uchar* plane_ptr = (uchar*)buf.data() + offset_16;
        QVector<uchar*> dst(nb_planes, 0);
        for (int i = 0; i < nb_planes; ++i) {
            dst[i] = plane_ptr;
            // TODO: add VideoFormat::planeWidth/Height() ?
            // pitch instead of surface_width
            plane_ptr += pitch[i] * h[i];
            d.gpu_mem.copyFrame(src[i], dst[i], pitch[i], h[i], pitch[i]);
        }
        frame = VideoFrame(buf, width(), height(), fmt);
        frame.setBits(dst);
        frame.setBytesPerLine(pitch);
    } else {
        frame = VideoFrame(width(), height(), fmt);
        frame.setBits(src);
        frame.setBytesPerLine(pitch);
        // TODO: why clone is faster()?
        // TODO: buffer pool and create VideoFrame when needed to avoid copy? also for other va
        frame = frame.clone();
    }
    frame.setTimestamp(double(d.frame->pkt_pts)/1000.0);
    frame.setDisplayAspectRatio(d.getDAR(d.frame));
    d.updateColorDetails(&frame);
    return frame;
}

VideoFrame VideoDecoderVAAPI::frame()
{
    DPTR_D(VideoDecoderVAAPI);
    if (!d.frame->opaque || !d.frame->data[0])
        return VideoFrame();
    VASurfaceID surface_id = (VASurfaceID)(uintptr_t)d.frame->data[3];
    VAStatus status = VA_STATUS_SUCCESS;
    if (display() == GLX) {
        d.surface_interop->setSurface((va_surface_t*)d.frame->opaque, d.surface_width, d.surface_height);
        VideoFrame f(d.surface_width, d.surface_height, VideoFormat::Format_RGB32);
        f.setBytesPerLine(d.surface_width*4); //used by gl to compute texture size
        f.setSurfaceInterop(d.surface_interop);
        return f;
    }
#if VA_CHECK_VERSION(0,31,0)
    if ((status = vaSyncSurface(d.display, surface_id)) != VA_STATUS_SUCCESS) {
        qWarning("vaSyncSurface(VADisplay:%p, VASurfaceID:%#x) == %#x", d.display, surface_id, status);
#else
    if (vaSyncSurface(d.display, d.context_id, surface_id)) {
        qWarning("vaSyncSurface(VADisplay:%#x, VAContextID:%#x, VASurfaceID:%#x) == %#x", d.display, d.context_id, surface_id, status);
#endif
        return VideoFrame();
    }

    if (!d.disable_derive && d.supports_derive) {
        /*
         * http://web.archiveorange.com/archive/v/OAywENyq88L319OcRnHI
         * vaDeriveImage is faster than vaGetImage. But VAImage is uncached memory and copying from it would be terribly slow
         * TODO: copy from USWC, see vlc and https://github.com/OpenELEC/OpenELEC.tv/pull/2937.diff
         * https://software.intel.com/en-us/articles/increasing-memory-throughput-with-intel-streaming-simd-extensions-4-intel-sse4-streaming-load
         */
        status = vaDeriveImage(d.display, surface_id, &d.image);
        if (status != VA_STATUS_SUCCESS) {
            qWarning("vaDeriveImage(VADisplay:%p, VASurfaceID:%#x, VAImage*:%p) == %#x", d.display, surface_id, &d.image, status);
            return VideoFrame();
        }
    } else {
        status = vaGetImage(d.display, surface_id, 0, 0, d.surface_width, d.surface_height, d.image.image_id);
        if (status != VA_STATUS_SUCCESS) {
            qWarning("vaGetImage(VADisplay:%p, VASurfaceID:%#x, 0,0, %d, %d, VAImageID:%#x) == %#x", d.display, surface_id, d.surface_width, d.surface_height, d.image.image_id, status);
            return VideoFrame();
        }
    }

    void *p_base;
    if ((status = vaMapBuffer(d.display, d.image.buf, &p_base)) != VA_STATUS_SUCCESS) {
        qWarning("vaMapBuffer(VADisplay:%p, VABufferID:%#x, pBuf:%p) == %#x", d.display, d.image.buf, &p_base, status);
        return VideoFrame();
    }

    VideoFormat::PixelFormat pixfmt = VideoFormat::Format_Invalid;
    bool swap_uv = false;
    switch (d.image.format.fourcc) {
    case VA_FOURCC_YV12:
        swap_uv |= d.disable_derive || !d.supports_derive;
        pixfmt = VideoFormat::Format_YUV420P;
        break;
    case VA_FOURCC_IYUV:
        swap_uv = true;
        pixfmt = VideoFormat::Format_YUV420P;
        break;
    case VA_FOURCC_NV12:
        pixfmt = VideoFormat::Format_NV12;
        break;
    default:
        break;
    }
    if (pixfmt == VideoFormat::Format_Invalid) {
        qWarning("unsupported vaapi pixel format: %#x", d.image.format.fourcc);
        return VideoFrame();
    }
    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 + d.image.offsets[i];
        pitch[i] = d.image.pitches[i];
    }
    if (swap_uv) {
        std::swap(src[1], src[2]);
        std::swap(pitch[1], pitch[2]);
    }
    VideoFrame frame;
    if (d.copy_uswc && d.gpu_mem.isReady()) {
        int yuv_size = 0;
        if (pixfmt == VideoFormat::Format_NV12)
            yuv_size = pitch[0]*d.surface_height*3/2;
        else
            yuv_size = pitch[0]*d.surface_height + pitch[1]*d.surface_height/2 + pitch[2]*d.surface_height/2;
        // additional 15 bytes to ensure 16 bytes aligned
        QByteArray buf(15 + yuv_size, 0);
        const int offset_16 = (16 - ((uintptr_t)buf.data() & 0x0f)) & 0x0f;
        // plane 1, 2... is aligned?
        uchar* plane_ptr = (uchar*)buf.data() + offset_16;
        QVector<uchar*> dst(fmt.planeCount(), 0);
        for (int i = 0; i < dst.size(); ++i) {
            dst[i] = plane_ptr;
            // TODO: add VideoFormat::planeWidth/Height() ?
            const int plane_w = pitch[i];//(i == 0 || pixfmt == VideoFormat::Format_NV12) ? d.surface_width : fmt.chromaWidth(d.surface_width);
            const int plane_h = i == 0 ? d.surface_height : fmt.chromaHeight(d.surface_height);
//.........这里部分代码省略.........