XvMC
[Hardware Accelerators bridge]

Data Structures
struct	xvmc_pix_fmt
Files
file	xvmc.h
	Public libavcodec XvMC header.
Defines
#define	AV_XVMC_ID   0x1DC711C0
	special value to ensure that regular pixel routines haven't corrupted the struct the number is 1337 speak for the letters IDCT MCo (motion compensation)
Variables
XvMCSurface *	xvmc_pix_fmt::p_past_surface
	Set by the decoder before calling ff_draw_horiz_band(), needed by the XvMCRenderSurface function.
XvMCSurface *	xvmc_pix_fmt::p_future_surface
	Pointer to the surface used as future reference application - unchanged libavcodec - set.
unsigned int	xvmc_pix_fmt::picture_structure
	top/bottom field or frame application - unchanged libavcodec - set
unsigned int	xvmc_pix_fmt::flags
	XVMC_SECOND_FIELD - 1st or 2nd field in the sequence application - unchanged libavcodec - set.
int	xvmc_pix_fmt::start_mv_blocks_num
	Number of macroblock descriptions in the mv_blocks array that have already been passed to the hardware.
int	xvmc_pix_fmt::filled_mv_blocks_num
	Number of new macroblock descriptions in the mv_blocks array (after start_mv_blocks_num) that are filled by libavcodec and have to be passed to the hardware.
int	xvmc_pix_fmt::next_free_data_block_num
	Number of the the next free data block; one data block consists of 64 short values in the data_blocks array.

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Define Documentation

#define AV_XVMC_ID   0x1DC711C0

special value to ensure that regular pixel routines haven't corrupted the struct the number is 1337 speak for the letters IDCT MCo (motion compensation)

Definition at line 41 of file xvmc.h.

Referenced by ff_xvmc_decode_mb(), ff_xvmc_field_start(), and ff_xvmc_init_block().

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Variable Documentation

int xvmc_pix_fmt::filled_mv_blocks_num [inherited]

Number of new macroblock descriptions in the mv_blocks array (after start_mv_blocks_num) that are filled by libavcodec and have to be passed to the hardware.

• application - zeroes it on get_buffer() or after successful ff_draw_horiz_band().
• libavcodec - increment with one of each stored MB

Definition at line 148 of file xvmc.h.

Referenced by ff_xvmc_decode_mb(), ff_xvmc_field_end(), and ff_xvmc_field_start().

unsigned int xvmc_pix_fmt::flags [inherited]

XVMC_SECOND_FIELD - 1st or 2nd field in the sequence

• application - unchanged
• libavcodec - set.

Definition at line 129 of file xvmc.h.

Referenced by ff_xvmc_field_start().

int xvmc_pix_fmt::next_free_data_block_num [inherited]

Number of the the next free data block; one data block consists of 64 short values in the data_blocks array.

All blocks before this one have already been claimed by placing their position into the corresponding block description structure field, that are part of the mv_blocks array.

• application - zeroes it on get_buffer(). A successful ff_draw_horiz_band() may zero it together with start_mb_blocks_num.
• libavcodec - each decoded macroblock increases it by the number of coded blocks it contains.

Definition at line 161 of file xvmc.h.

Referenced by ff_xvmc_decode_mb(), ff_xvmc_field_start(), and ff_xvmc_init_block().

XvMCSurface* xvmc_pix_fmt::p_future_surface [inherited]

Pointer to the surface used as future reference

• application - unchanged
• libavcodec - set.

Definition at line 117 of file xvmc.h.

Referenced by ff_xvmc_field_start().

XvMCSurface* xvmc_pix_fmt::p_past_surface [inherited]

Set by the decoder before calling ff_draw_horiz_band(), needed by the XvMCRenderSurface function.

Pointer to the surface used as past reference

• application - unchanged
• libavcodec - set

Definition at line 111 of file xvmc.h.

Referenced by ff_xvmc_field_start().

unsigned int xvmc_pix_fmt::picture_structure [inherited]

top/bottom field or frame

• application - unchanged
• libavcodec - set

Definition at line 123 of file xvmc.h.

Referenced by ff_xvmc_field_start().

int xvmc_pix_fmt::start_mv_blocks_num [inherited]

Number of macroblock descriptions in the mv_blocks array that have already been passed to the hardware.

• application - zeroes it on get_buffer(). A successful ff_draw_horiz_band() may increment it with filled_mb_block_num or zero both.
• libavcodec - unchanged

Definition at line 139 of file xvmc.h.

Referenced by ff_xvmc_decode_mb(), and ff_xvmc_field_start().