Yes, but what I need to do is make all of the Android's surfaces beneath (and including) the video surface transparent, but leave the global alpha as is for the possible player's media controls. Any ideas?
On May 6, 5:20 pm, Deva R <[email protected]> wrote: > you can chose the transparency level by tuning alpha blend.. > > on enabling global alpha blending, the final ouptput pixel will be arrived as, > output = (framebuffer pixel * alpha + video pixel * (255 - alpha)) / 255 > > you need to set this alpha field with below ioctl commands.. > > ret = v4l2_ioctl(fd, VIDIOC_G_FMT, &fmt); > fmt.fmt.win.global_alpha = alpha & 0xFF; > ret = v4l2_overlay_ioctl(fd, VIDIOC_S_FMT, &fmt); > > you can check complete source in our tree > -http://git.omapzoom.org/?p=platform/hardware/ti/omap3.git;a=blob;f=li... > > On Thu, May 6, 2010 at 7:55 PM, Svetozar Miuchin > > > > <[email protected]> wrote: > > You mean setting the global alpha to fully transparent? If so, I've > > thought about that, but that destroys the possibility of having on- > > screen media controls.. Right? > > > On May 6, 4:18 pm, Deva R <[email protected]> wrote: > >> You can enable alpha blending in your display driver, so both graphics > >> and video overlay blend.. > > >> my call sequence for this are like (get fb handle, toggle alpha > >> blending, set the fb options) > > >> v4l2_ioctl(fd, VIDIOC_G_FBUF, &fbuf); > >> fbuf.flags |= V4L2_FBUF_FLAG_GLOBAL_ALPHA; > >> v4l2_ioctl(fd, VIDIOC_S_FBUF, &fbuf); > > >> more info:http://v4l2spec.bytesex.org/spec/r10595.htm-> framebuffer flags > >> -> > >> V4L2_FBUF_FLAG_GLOBAL_ALPHA > > >> On Thu, May 6, 2010 at 7:20 PM, Svetozar Miuchin > > >> <[email protected]> wrote: > >> > Hi, > >> > I'm porting Android to a board with hardware video decoding support. > >> > The board hardware draws the video into a video layer beneath the > >> > graphic layer. I've implemented a custom media player that passes the > >> > calls to the hardware decoders, but I need to make Android's surfaces > >> > transparent. Is there any way this is possible with the current > >> > Android architecture? I'm using the Eclair version for MIPS > >> > architectures. > >> > Thanks in advance, > >> > Svetozar > > >> > -- > >> > unsubscribe: [email protected] > >> > website:http://groups.google.com/group/android-porting > > >> -- > >> unsubscribe: [email protected] > >> website:http://groups.google.com/group/android-porting > > > -- > > unsubscribe: [email protected] > > website:http://groups.google.com/group/android-porting > > -- > unsubscribe: [email protected] > website:http://groups.google.com/group/android-porting -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
