RepoMirrors
/
mpv
mirror of https://github.com/mpv-player/mpv
1
0
Fork 0
Code Issues Releases Wiki Activity
mpv/video/hwdec.h

59 lines
1.9 KiB
C
Raw Normal View History

video: move struct mp_hwdec_info into its own header file 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.
2013-11-23 20:26:31 +00:00
#ifndef MP_HWDEC_H_
#define MP_HWDEC_H_
video: have a generic context struct for hwdec backends 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.
2015-01-22 14:32:23 +00:00
struct mp_image_pool;
command: add property returning detected hwdec API 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).
2015-02-02 21:43:05 +00:00
// keep in sync with --hwdec option
enum hwdec_type {
HWDEC_AUTO = -1,
HWDEC_NONE = 0,
HWDEC_VDPAU = 1,
HWDEC_VDA = 2,
HWDEC_VAAPI = 4,
HWDEC_VAAPI_COPY = 5,
HWDEC_DXVA2_COPY = 6,
RPI support This requires FFmpeg git master for accelerated hardware decoding. Keep in mind that FFmpeg must be compiled with --enable-mmal. Libav will also work. Most things work. Screenshots don't work with accelerated/opaque decoding (except using full window screenshot mode). Subtitles are very slow - even simple but huge overlays can cause frame drops. This always uses fullscreen mode. It uses dispmanx and mmal directly, and there are no window managers or anything on this level. vo_opengl also kind of works, but is pretty useless and slow. It can't use opaque hardware decoding (copy back can be used by forcing the option --vd=lavc:h264_mmal). Keep in mind that the dispmanx backend is preferred over the X11 ones in case you're trying on X11; but X11 is even more useless on RPI. This doesn't correctly reject extended h264 profiles and thus doesn't fallback to software decoding. The hw supports only up to the high profile, and will e.g. return garbage for Hi10P video. This sets a precedent of enabling hw decoding by default, but only if RPI support is compiled (which most hopefully it will be disabled on desktop Linux platforms). While it's more or less required to use hw decoding on the weak RPI, it causes more problems than it solves on real platforms (Linux has the Intel GPU problem, OSX still has some cases with broken decoding.) So I can live with this compromise of having different defaults depending on the platform. Raspberry Pi 2 is required. This wasn't tested on the original RPI, though at least decoding itself seems to work (but full playback was not tested).
2015-03-29 13:12:11 +00:00
HWDEC_RPI = 7,
command: add property returning detected hwdec API 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).
2015-02-02 21:43:05 +00:00
};
video: have a generic context struct for hwdec backends 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.
2015-01-22 14:32:23 +00:00
struct mp_hwdec_ctx {
command: add property returning detected hwdec API 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).
2015-02-02 21:43:05 +00:00
enum hwdec_type type;
video: have a generic context struct for hwdec backends 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.
2015-01-22 14:32:23 +00:00
void *priv; // for free use by hwdec implementation
// API-specific, not needed by all backends.
struct mp_vdpau_ctx *vdpau_ctx;
struct mp_vaapi_ctx *vaapi_ctx;
vo_direct3d, dxva2: use the same D3D device Since we still read-back (and don't have hard plans on changing this), this doesn't have much of an advantage.
2015-07-03 13:58:19 +00:00
struct mp_d3d_ctx *d3d_ctx;
video: handle hwdec screenshots differently 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.
2015-01-22 16:47:14 +00:00
// Optional.
// Allocates a software image from the pool, downloads the hw image from
// mpi, and returns it.
// pool can be NULL (then just use straight allocation).
// Return NULL on error or if mpi has the wrong format.
struct mp_image *(*download_image)(struct mp_hwdec_ctx *ctx,
struct mp_image *mpi,
struct mp_image_pool *swpool);
video: have a generic context struct for hwdec backends 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.
2015-01-22 14:32:23 +00:00
};
video: move struct mp_hwdec_info into its own header file 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.
2013-11-23 20:26:31 +00:00
// Used to communicate hardware decoder API handles from VO to video decoder.
// The VO can set the context pointer for supported APIs.
struct mp_hwdec_info {
video: have a generic context struct for hwdec backends 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.
2015-01-22 14:32:23 +00:00
// (Since currently only 1 hwdec API is loaded at a time, this pointer
// simply maps to the loaded one.)
struct mp_hwdec_ctx *hwctx;
video: move struct mp_hwdec_info into its own header file 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.
2013-11-23 20:26:31 +00:00
// Can be used to lazily load a requested API.
// api_name is e.g. "vdpau" (like the fields above, without "_ctx")
video: have a generic context struct for hwdec backends 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.
2015-01-22 14:32:23 +00:00
// Can be NULL, is idempotent, caller checks hwctx fields for success/access.
video: move display and timing to a separate thread 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.
2014-08-12 21:02:08 +00:00
// Due to threading, the callback is the only code that is allowed to
// change fields in this struct after initialization.
video: move struct mp_hwdec_info into its own header file 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.
2013-11-23 20:26:31 +00:00
void (*load_api)(struct mp_hwdec_info *info, const char *api_name);
void *load_api_ctx;
};
// Trivial helper to call info->load_api().
// Implemented in vd_lavc.c.
void hwdec_request_api(struct mp_hwdec_info *info, const char *api_name);
#endif