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* command: add property returning detected hwdec APIwm42015-02-021-0/+13
| | | | | | | | | This is somewhat imperfect, because detection of hw decoding APIs is mostly done on demand, and often avoided if not necessary. (For example, we know very well that there are no hw decoders for certain codecs.) This also requires every hwdec backend to identify itself (see hwdec.h changes).
* video: handle hwdec screenshots differentlywm42015-01-221-0/+9
| | | | | | | | Instead of converting the hw surface to an image in the VO, provide a generic way to convet hw surfaces, and use this in the screenshot code. It's all relatively straightforward, except vdpau is being terrible. It needs a huge chunk of new code, because copying back is not simple.
* video: have a generic context struct for hwdec backendswm42015-01-221-3/+15
| | | | | | | | | | | Before this commit, each hw backend had their own specific struct types for context, and some, like VDA, had none at all. Add a context struct (mp_hwdec_ctx) that provides a somewhat generic way to pass the hwdec context around. Some things get slightly better, some slightly more verbose. mp_hwdec_info is still around; it's still needed, but is reduced to its role of handling delayed loading of the hwdec backend.
* video: move display and timing to a separate threadwm42014-08-121-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The VO is run inside its own thread. It also does most of video timing. The playloop hands the image data and a realtime timestamp to the VO, and the VO does the rest. In particular, this allows the playloop to do other things, instead of blocking for video redraw. But if anything accesses the VO during video timing, it will block. This also fixes vo_sdl.c event handling; but that is only a side-effect, since reimplementing the broken way would require more effort. Also drop --softsleep. In theory, this option helps if the kernel's sleeping mechanism is too inaccurate for video timing. In practice, I haven't ever encountered a situation where it helps, and it just burns CPU cycles. On the other hand it's probably actively harmful, because it prevents the libavcodec decoder threads from doing real work. Side note: Originally, I intended that multiple frames can be queued to the VO. But this is not done, due to problems with OSD and other certain features. OSD in particular is simply designed in a way that it can be neither timed nor copied, so you do have to render it into the video frame before you can draw the next frame. (Subtitles have no such restriction. sd_lavc was even updated to fix this.) It seems the right solution to queuing multiple VO frames is rendering on VO-backed framebuffers, like vo_vdpau.c does. This requires VO driver support, and is out of scope of this commit. As consequence, the VO has a queue size of 1. The existing video queue is just needed to compute frame duration, and will be moved out in the next commit.
* video: move struct mp_hwdec_info into its own header filewm42013-11-231-0/+20
This means most code accessing this struct must now include hwdec.h instead of dec_video.h. I just put it into dec_video.h at first because I thought a separate file would be a waste, but it's more proper to do it this way, as there are too many files which include dec_video.h only to get the mp_hwdec_info definition.