diff options
Diffstat (limited to 'DOCS/tech/vidix.txt')
| -rw-r--r-- | DOCS/tech/vidix.txt | 78 |
1 files changed, 39 insertions, 39 deletions
diff --git a/DOCS/tech/vidix.txt b/DOCS/tech/vidix.txt index 71409be69d..7308dde184 100644 --- a/DOCS/tech/vidix.txt +++ b/DOCS/tech/vidix.txt @@ -1,5 +1,5 @@ - VIDIX - VIDeo Interface for *niX - ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + VIDIX - VIDeo Interface for *niX + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This interface was designed and introduced as interface to userspace drivers to provide DGA everywhere where it's possible (unline X11). @@ -40,43 +40,43 @@ So any suggestions, reports, criticism are gladly accepted. 7) APP calls vixConfigPlayback. Driver should prepare BES on this call. APP pass to driver following info: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - vidix_playback_t.fourcc - contains fourcc of movie - vidix_playback_t.capability - currently contsinas copy of vidix_capability_t.flags + vidix_playback_t.fourcc - contains fourcc of movie + vidix_playback_t.capability - currently contsinas copy of vidix_capability_t.flags vidix_playback_t.blend_factor- currently unused - vidix_playback_t.src - x,y,w,h fields contain original movie size - (in pixels) x and y often are nulls. + vidix_playback_t.src - x,y,w,h fields contain original movie size + (in pixels) x and y often are nulls. vidix_playback_t.src.pitch.y These fields contain source pitches vidix_playback_t.src.pitch.u - for each Y,U,V plane in bytes. vidix_playback_t.src.pitch.v (For packed fourcc only Y value is used) - They are hints for driver to use same destinition - pitches as in source memory (to speed up - memcpy process). - Note: when source pitches are unknown or - variable these field will be filled into 0. - vidix_playback_t.dest - x,y,w,h fields contains destinition rectange - on the screen in pixels. + They are hints for driver to use same destinition + pitches as in source memory (to speed up + memcpy process). + Note: when source pitches are unknown or + variable these field will be filled into 0. + vidix_playback_t.dest - x,y,w,h fields contains destinition rectange + on the screen in pixels. vidix_playback_t.num_frames - maximal # of frames which can be used by APP. - (Currently 10). + (Currently 10). Driver should fill following fields: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vidix_playback_t.num_frames - real # of frames which will be used by driver. - (Should be less or equal to app's num_frames). + (Should be less or equal to app's num_frames). vidix_playback_t.dest.pitch.y These fields should contain alignment vidix_playback_t.dest.pitch.u - for each Y,U,V plane in bytes. vidix_playback_t.dest.pitch.v (For packed fourcc only Y value is used) - vidix_playback_t.frame_size - Driver should tell to app which size of - source frame (src.w and src.h) should - use APP (according to pitches and offsets) + vidix_playback_t.frame_size - Driver should tell to app which size of + source frame (src.w and src.h) should + use APP (according to pitches and offsets) - vidix_playback_t.offsets - offsets from begin of BES memory for each frame + vidix_playback_t.offsets - offsets from begin of BES memory for each frame - vidix_playback_t.offset.y These field should contain offset - vidix_playback_t.offset.u - for each Y,U,V plane within frame. - vidix_playback_t.offset.v (For packed fourcc only Y value is used) + vidix_playback_t.offset.y These field should contain offset + vidix_playback_t.offset.u - for each Y,U,V plane within frame. + vidix_playback_t.offset.v (For packed fourcc only Y value is used) - vidix_playback_t.dga_addr - Address of BES memory. + vidix_playback_t.dga_addr - Address of BES memory. Also see this picture: @@ -85,9 +85,9 @@ VIDEO MEMORY layout: | | v v [ RGB memory | YUV memory | UNDEF ] - ^ - | - +---- begin of BES memory + ^ + | + +---- begin of BES memory BES MEMORY layout: +-------- begin of BES memory @@ -109,22 +109,22 @@ offset of Y plane != offset of first frame But often: vidix_playback_t.offsets[0] = vidix_playback_t.offset.y = 0; Formula: (For Y plane) copy source to: - vidix_playback_t.dga_addr + - vidix_playback_t.offsets[i] + - vidix_playback_t.offset.y + vidix_playback_t.dga_addr + + vidix_playback_t.offsets[i] + + vidix_playback_t.offset.y 8) APP calls vixPlaybackOn. Driver should activate BES on this call. 9) PLAYBACK. Driver should sleep here ;) But during playback can be called: vixFrameSelect (if this function is exported) - Driver should prepare and activate corresponded frame. - This function is used only for double and trilpe buffering and - never used for single buffering playback. + Driver should prepare and activate corresponded frame. + This function is used only for double and trilpe buffering and + never used for single buffering playback. vixGet(Set)GrKeys (if this function is exported) - This interface should be tuned but intriduced for overlapped playback - and video effects (TYPE_FX) + This interface should be tuned but intriduced for overlapped playback + and video effects (TYPE_FX) vixPlaybackGet(Set)Eq (if this function is exported) - For color correction. + For color correction. 10) APP calls vixPlaybackOff. Driver should deactivate BES on this call. 11) If vixDestroy is defined APP calls this function before unloading driver from memory. @@ -144,10 +144,10 @@ All other functions are optionaly. Useful links: ~~~~~~~~~~~~~ -Guide to DTV http://www.digitaltelevision.com/dtvbook/toc.shtml -Fourcc http://www.webartz.com/fourcc/ -MPEG http://www.mpeg.org/MPEG/index.html -Analog colors http://www.miranda.com/en/app_notes/TN/TN-05/TN-05.htm +Guide to DTV http://www.digitaltelevision.com/dtvbook/toc.shtml +Fourcc http://www.webartz.com/fourcc/ +MPEG http://www.mpeg.org/MPEG/index.html +Analog colors http://www.miranda.com/en/app_notes/TN/TN-05/TN-05.htm Please send your suggestions, reports, feedback to mplayer-dev-eng@mplayerhq.hu Best regards! Nick Kurshev. |