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authorIvan Kalvachev <ikalvachev@gmail.com>2009-02-15 01:35:32 +0000
committerIvan Kalvachev <ikalvachev@gmail.com>2009-02-15 01:35:32 +0000
commit72d38a749b3e501adfef396c44a939aa2220d8d3 (patch)
tree24879513f0b8faec36ead3ef6bc0cf27c5ab09f1 /libavcodec/xvmc.h
parentf85190957943777d748ad8fadb8b8a63db4eba83 (diff)
downloadffmpeg-72d38a749b3e501adfef396c44a939aa2220d8d3.tar.gz
Detailed description of the interesting fields in xvmc struct.
Originally committed as revision 17306 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/xvmc.h')
-rw-r--r--libavcodec/xvmc.h32
1 files changed, 25 insertions, 7 deletions
diff --git a/libavcodec/xvmc.h b/libavcodec/xvmc.h
index e46a9ba4e2..b871087780 100644
--- a/libavcodec/xvmc.h
+++ b/libavcodec/xvmc.h
@@ -58,17 +58,35 @@ struct xvmc_render_state {
#endif
//}@
-/** modified by calling application and the decoder */
-//@{
- int start_mv_blocks_num; ///< offset in the array for the current slice, updated by vo
- int filled_mv_blocks_num; ///< processed mv block in this slice, changed by decoder
+ /** Offset in the mv array for the current slice:
+ - application - zeros it on get_buffer().
+ successful draw_horiz_band() may increment it
+ with filled_mb_block_num or zero both.
+ - libavcodec - unchanged
+ */
+ int start_mv_blocks_num;
+
+ /** Processed mv blocks in this slice:
+ - application - zeros it on get_buffer() or after successful draw_horiz_band()
+ - libavcodec - increment with one of each stored MB
+ */
+ int filled_mv_blocks_num;
+
+ /** Used in add_mv_block, pointer to next free block
+ - application - zeroes it on get_buffer() and after successful draw_horiz_band()
+ - libvcodec - each macroblock increases it with the number of coded blocks in it.
+ */
+ int next_free_data_block_num;
- int next_free_data_block_num; ///< used in add_mv_block, pointer to next free block
-//}@
/** extensions may be placed here */
#if LIBAVCODEC_VERSION_MAJOR < 53
//@{
- int state; ///< 0 - free, 1 - waiting to display, 2 - waiting for prediction
+ /** State - used to workaround limitations in MPlayer vo system.
+ 0 -Surface not used
+ 1 -Surface is still hold in application to be displayed or is still visible.
+ 2 -Surface is still hold in lavcodec buffer for prediction
+ */
+ int state;
void* p_osd_target_surface_render; ///< pointer to the surface where subpicture is rendered
//}@
#endif