#
# cat /sys/class/disp/disp/attr/sys
screen 0:
de_rate 300000000 hz, ref_fps:59
mgr0: 720x1440 fmt[rgb] cs[0x204] range[full] eotf[0x4] bits[8bits] err[166] force_sync[0] unblank direct_show[false] iommu[1]
dmabuf: cache[0] cache max[0] umap skip[0] overflow[0]
lcd output backlight(100) fps:59.9 720x1440
err:1 skip:90 irq:3780659 vsync:0 vsync_skip:0
BUF enable ch[0] lyr[0] z[11] prem[N] a[pixel 0] fmt[ 77] fb[1088,1920; 544, 960; 544, 960] crop[ 8, 0,1080,1920] frame[ 0, 0, 400, 400] addr[fc800000,fc9fe000,fca7d800] flags[0x 0] trd[0,0] depth[ 0]
BUF enable ch[1] lyr[0] z[0] prem[N] a[globl 255] fmt[ 0] fb[ 736,1440; 736,1440; 736,1440] crop[ 0, 0, 720,1440] frame[ 0, 0, 720,1440] addr[ff000000, 0, 0] flags[0x 0] trd[0,0] depth[ 0]
#
#z[11]：视频层
z[0]： UI层
z值越大，越处于上层，所以视频层遮住了视频播放层
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正常的T113板子是这样的：
root:/# cat /sys/class/disp/disp/attr/sys
screen 0:
de_rate 300000000 hz, ref_fps:58
mgr0: 1200x1920 fmt[rgb] cs[0x204] range[full] eotf[0x4] bits[8bits] err[10] force_sync[0] unblank direct_show[false] iommu[1]
dmabuf: cache[2] cache max[2] umap skip[0] umap skip max[20]
lcd output backlight(100) fps:57.1 1200x1920
err:0 skip:78 irq:3685 vsync:0 vsync_skip:0
BUF enable ch[0] lyr[0] z[0] prem[N] a[globl 255] fmt[ 72] fb[1088,1920; 544, 960; 544, 960] crop[ 8, 0,1080,1920] frame[ 0, 0,1200,1920] addr[ 5700000, 597d800, 58fe000] flags[0x 0] trd[0,0]
depth[ 0]
BUF enable ch[1] lyr[0] z[16] prem[N] a[pixel 255] fmt[ 0] fb[1200,1920;1200,1920;1200,1920] crop[ 0,1920,1200,1920] frame[ 0, 0,1200,1920] addr[ 0, 0, 0] flags[0x 0] trd[0,0]
depth[ 0]
root:/#
root:/#
root:/#z[0]：视频层
z[16]： UI层
层数字越大，就越处于顶层，所以UI会把视频层遮住，这个是正常逻辑。
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分析T113 SDK发现，UI处于16层的原因：
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/dev_fb.c
config.info.mode = LAYER_MODE_BUFFER;
config.info.zorder = 16;
config.info.alpha_mode = 0;
config.info.alpha_value = 0xff;
config.info.fb.crop.x = (0LL) << 32;
config.info.fb.crop.y = ((long long)y_offset) << 32;
config.info.fb.crop.width =
((long long)src_width) << 32;
config.info.fb.crop.height =
((long long)src_height) << 32;播放器tplayer处于0的原因：
openwrt/package/allwinner/multimedia/tina_multimedia/tplayer/awsink/tlayer_ctrl.c
lc->mDispOutPort->setRectFake(lc->mDispOutPort,&rect);
lc->mDispOutPort->SetZorder(lc->mDispOutPort, VIDEO_ZORDER_BOTTOM);
lc->mDispOutPort->setEnable(lc->mDispOutPort, 1);
pthread_mutex_unlock(&configMtx);platform/allwinner/display/libuapi/src/videoOutPort.c
static int layer_set_zorder(int fd, unsigned int hlay, int zorder) {
disp_layer_info config;
videoZorder layer_zorder = (videoZorder) zorder;
if ((layer_zorder < VIDEO_ZORDER_TOP)
|| (layer_zorder < VIDEO_ZORDER_TOP)) {
DISP_DBG_LOG("(%s)invalid zorder\n", __FUNCTION__);
return RET_FAIL;
}
memset(&config, 0, sizeof(disp_layer_info));
LayerGetPara(fd, hlay, &config);
switch (layer_zorder) {
case VIDEO_ZORDER_TOP:
config.zorder = ZORDER_MAX;
break;
case VIDEO_ZORDER_BOTTOM:
config.zorder = ZORDER_MIN;
break;
default:
break;
}
return LayerSetPara(fd, hlay, &config);
}#define ZORDER_MIN 0
#define ZORDER_MID 5
#define ZORDER_MAX 11最终决定播放器的层是 ZORDER_MIN，即0
屎山代码写得真烂
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A133 照上面修改，然后把文件lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/dev_fb.c的
config.info.alpha_mode = 1;修改成：
config.info.alpha_mode = 0;即可正常工作。
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UI开个小透明窗，让视频层显示出来：
setAttribute(Qt::WA_TranslucentBackground);
setWindowFlags(Qt::FramelessWindowHint);void paintEvent(QPaintEvent *event) override
{
QPainter painter(this);// 创建一个 QPainter 对象
painter.setRenderHint(QPainter::Antialiasing);
painter.setBrush(Qt::white);
painter.drawRect(rect()); //整个窗口刷白
painter.setCompositionMode(QPainter::CompositionMode_Clear);
QColor color(0, 0, 0, 0); // RGB 和 Alpha 值
painter.setBrush(color);
painter.drawRect(100, 100, 500, 500); // 绘制一个透明矩形
painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
QWidget::paintEvent(event);// 调用基类的 paintEvent 处理其他默认绘制
}离线
测试效果
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