ops.c File Reference

#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/bswap.h"
#include "libavutil/mem.h"
#include "libavutil/rational.h"
#include "libavutil/refstruct.h"
#include "format.h"
#include "ops.h"
#include "ops_internal.h"

Go to the source code of this file.

Macros
#define	DUMMY_SIZE   16

Enumerations
enum	{ SWS_COMP_IDENTITY = SWS_COMP_ZERO | SWS_COMP_EXACT }

Functions
const char *	ff_sws_pixel_type_name (SwsPixelType type)
int	ff_sws_pixel_type_size (SwsPixelType type)
bool	ff_sws_pixel_type_is_int (SwsPixelType type)
const char *	ff_sws_op_type_name (SwsOpType op)
SwsCompMask	ff_sws_comp_mask_q4 (const AVRational q[4])
void	ff_sws_comp_mask_swizzle (SwsCompMask *mask, const SwsSwizzleOp *swiz)
SwsCompMask	ff_sws_comp_mask_needed (const SwsOp *op)
int	ff_sws_rw_op_planes (const SwsOp *op)
	Return the number of planes involved in a read/write operation. More...
static AVRational	av_min_q (AVRational a, AVRational b)
static AVRational	av_max_q (AVRational a, AVRational b)
void	ff_sws_apply_op_q (const SwsOp *op, AVRational x[4])
	Apply an operation to an AVRational. More...
static SwsCompFlags	merge_comp_flags (SwsCompFlags a, SwsCompFlags b)
static void	propagate_flags (SwsOp *op, const SwsComps *prev)
static void	clear_undefined_values (AVRational dst[4], const AVRational src[4])
static void	apply_filter_weights (SwsComps *comps, const SwsComps *prev, const SwsFilterWeights *weights)
void	ff_sws_op_list_update_comps (SwsOpList *ops)
	Infer + propagate known information about components. More...
static void	op_uninit (SwsOp *op)
SwsOpList *	ff_sws_op_list_alloc (void)
void	ff_sws_op_list_free (SwsOpList **p_ops)
SwsOpList *	ff_sws_op_list_duplicate (const SwsOpList *ops)
	Returns a duplicate of ops, or NULL on OOM. More...
const SwsOp *	ff_sws_op_list_input (const SwsOpList *ops)
	Returns the input operation for a given op list, or NULL if there is none (e.g. More...
const SwsOp *	ff_sws_op_list_output (const SwsOpList *ops)
	Returns the output operation for a given op list, or NULL if there is none. More...
void	ff_sws_op_list_remove_at (SwsOpList *ops, int index, int count)
int	ff_sws_op_list_insert_at (SwsOpList *ops, int index, SwsOp *op)
int	ff_sws_op_list_append (SwsOpList *ops, SwsOp *op)
	These will take over ownership of op and set it to {0}, even on failure. More...
bool	ff_sws_op_list_is_noop (const SwsOpList *ops)
	Returns whether an op list represents a true no-op operation, i.e. More...
int	ff_sws_op_list_max_size (const SwsOpList *ops)
	Returns the size of the largest pixel type used in ops. More...
uint32_t	ff_sws_linear_mask (const SwsLinearOp *c)
static const char *	describe_lin_mask (uint32_t mask)
static char	describe_comp_flags (SwsCompFlags flags)
static void	print_q (AVBPrint *bp, const AVRational q)
static void	print_q4 (AVBPrint *bp, const AVRational q4[4], SwsCompMask mask)
void	ff_sws_op_desc (AVBPrint *bp, const SwsOp *op)
	Describe an operation in human-readable form. More...
static void	desc_plane_order (AVBPrint *bp, int nb_planes, const uint8_t *order)
void	ff_sws_op_list_print (void *log, int lev, int lev_extra, const SwsOpList *ops)
	Print out the contents of an operation list. More...
static int	enum_ops_fmt (SwsContext *ctx, void *opaque, enum AVPixelFormat src_fmt, enum AVPixelFormat dst_fmt, int(*cb)(SwsContext *ctx, void *opaque, SwsOpList *ops))
int	ff_sws_enum_op_lists (SwsContext *ctx, void *opaque, enum AVPixelFormat src_fmt, enum AVPixelFormat dst_fmt, int(*cb)(SwsContext *ctx, void *opaque, SwsOpList *ops))
	Helper function to enumerate over all possible (optimized) operation lists, under the current set of options in ctx, and run the given callback on each list. More...

Variables
const SwsOpBackend	backend_c
	Copyright (C) 2025 Niklas Haas. More...
const SwsOpBackend	backend_murder
const SwsOpBackend	backend_aarch64
const SwsOpBackend	backend_x86
const SwsOpBackend *const	ff_sws_op_backends []
static const char *const	rw_mode_names []

Macro Definition Documentation

DUMMY_SIZE

#define DUMMY_SIZE   16

Definition at line 1032 of file ops.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
SWS_COMP_IDENTITY

Definition at line 309 of file ops.c.

Function Documentation

ff_sws_pixel_type_name()

const char* ff_sws_pixel_type_name

(

SwsPixelType

type

)

Definition at line 62 of file ops.c.

Referenced by ff_sws_op_desc(), ff_sws_op_list_print(), and ff_sws_uop_name().

ff_sws_pixel_type_size()

int ff_sws_pixel_type_size

(

SwsPixelType

type

)

Definition at line 77 of file ops.c.

Referenced by check_cast(), check_clear(), check_filter_fma(), check_scale(), compile(), convert_to_aarch64_impl(), ff_sws_apply_op_q(), ff_sws_op_list_max_size(), ff_sws_op_list_optimize(), ff_sws_pixel_expand(), ff_sws_solve_shuffle(), get_planar_fmt(), pixel_is_1s(), pixel_type_to_int(), rndq(), rw_pixel_bits(), setup_filter_h(), and setup_filter_h_4x4().

ff_sws_pixel_type_is_int()

bool ff_sws_pixel_type_is_int

(

SwsPixelType

type

)

Definition at line 92 of file ops.c.

Referenced by check_cast(), check_dither(), check_filter_fma(), check_linear(), check_scale(), exact_prod(), ff_sws_apply_op_q(), ff_sws_op_list_optimize(), ff_sws_op_list_update_comps(), ff_sws_uops_macros_gen(), op_commute_filter(), and rndq().

ff_sws_op_type_name()

const char* ff_sws_op_type_name

(

SwsOpType

op

)

Definition at line 109 of file ops.c.

Referenced by ff_sws_op_desc().

ff_sws_comp_mask_q4()

SwsCompMask ff_sws_comp_mask_q4

(

const AVRational

q[4]

)

Definition at line 137 of file ops.c.

Referenced by ff_sws_op_desc(), ff_sws_op_list_print(), and translate_op().

ff_sws_comp_mask_swizzle()

void ff_sws_comp_mask_swizzle	(	SwsCompMask *	mask,
		const SwsSwizzleOp *	swiz
	)

Definition at line 147 of file ops.c.

Referenced by op_commute_clear().

ff_sws_comp_mask_needed()

SwsCompMask ff_sws_comp_mask_needed

(

const SwsOp *

op

)

Definition at line 160 of file ops.c.

Referenced by ff_sws_op_desc(), ff_sws_op_list_optimize(), ff_sws_op_list_print(), translate_move(), translate_op(), and translate_swizzle().

ff_sws_rw_op_planes()

int ff_sws_rw_op_planes

(

const SwsOp *

op

)

Return the number of planes involved in a read/write operation.

Definition at line 170 of file ops.c.

Referenced by aarch64_compile(), compile(), ff_sws_op_list_is_noop(), ff_sws_op_list_print(), ff_sws_solve_shuffle(), and rw_data_planes().

av_min_q()

static AVRational av_min_q ( AVRational  a, AVRational  b  )

static

Definition at line 184 of file ops.c.

Referenced by ff_sws_apply_op_q().

av_max_q()

static AVRational av_max_q ( AVRational  a, AVRational  b  )

static

Definition at line 189 of file ops.c.

Referenced by ff_sws_apply_op_q().

ff_sws_apply_op_q()

void ff_sws_apply_op_q	(	const SwsOp *	op,
		AVRational	x[4]
	)

Apply an operation to an AVRational.

No-op for read/write operations.

Definition at line 194 of file ops.c.

Referenced by ff_sws_op_list_update_comps(), and op_commute_clear().

merge_comp_flags()

static SwsCompFlags merge_comp_flags ( SwsCompFlags  a, SwsCompFlags  b  )

static

Definition at line 313 of file ops.c.

Referenced by ff_sws_op_list_update_comps().

propagate_flags()

static void propagate_flags ( SwsOp *  op, const SwsComps *  prev  )

static

Definition at line 321 of file ops.c.

Referenced by ff_sws_op_list_update_comps().

clear_undefined_values()

static void clear_undefined_values ( AVRational  dst[4], const AVRational  src[4]  )

static

Definition at line 328 of file ops.c.

Referenced by ff_sws_op_list_update_comps().

apply_filter_weights()

static void apply_filter_weights ( SwsComps *  comps, const SwsComps *  prev, const SwsFilterWeights *  weights  )

static

Definition at line 336 of file ops.c.

Referenced by ff_sws_op_list_update_comps().

ff_sws_op_list_update_comps()

void ff_sws_op_list_update_comps

(

SwsOpList *

ops

)

Infer + propagate known information about components.

Called automatically when needed by the optimizer and compiler.

Definition at line 355 of file ops.c.

Referenced by compile_backend(), and ff_sws_op_list_optimize().

op_uninit()

static void op_uninit ( SwsOp *  op )

static

Definition at line 603 of file ops.c.

Referenced by ff_sws_op_list_free(), ff_sws_op_list_insert_at(), and ff_sws_op_list_remove_at().

ff_sws_op_list_alloc()

SwsOpList* ff_sws_op_list_alloc

(

void

)

Definition at line 621 of file ops.c.

ff_sws_op_list_free()

void ff_sws_op_list_free

(

SwsOpList **

p_ops

)

Definition at line 634 of file ops.c.

Referenced by compile_backend(), enum_ops_fmt(), ff_sws_compile_pass(), and ff_sws_op_list_subpass().

ff_sws_op_list_duplicate()

SwsOpList* ff_sws_op_list_duplicate

(

const SwsOpList *

ops

)

Returns a duplicate of ops, or NULL on OOM.

Definition at line 648 of file ops.c.

Referenced by compile_backend(), ff_sws_op_list_subpass(), print_passes(), and register_all_uops().

ff_sws_op_list_input()

const SwsOp* ff_sws_op_list_input

(

const SwsOpList *

ops

)

Returns the input operation for a given op list, or NULL if there is none (e.g.

for a pure CLEAR-only operation list).

This will always be an op of type SWS_OP_READ.

Definition at line 685 of file ops.c.

Referenced by aarch64_compile(), compile(), ff_sws_compile_pass(), ff_sws_op_list_is_noop(), ff_sws_solve_shuffle(), and get_input_size().

ff_sws_op_list_output()

const SwsOp* ff_sws_op_list_output

(

const SwsOpList *

ops

)

Returns the output operation for a given op list, or NULL if there is none.

This will always be an op of type SWS_OP_WRITE.

Definition at line 694 of file ops.c.

Referenced by aarch64_compile(), compile(), ff_sws_compile_pass(), and ff_sws_op_list_is_noop().

ff_sws_op_list_remove_at()

void ff_sws_op_list_remove_at	(	SwsOpList *	ops,
		int	index,
		int	count
	)

Definition at line 703 of file ops.c.

Referenced by ff_sws_op_list_optimize(), and ff_sws_op_list_subpass().

ff_sws_op_list_insert_at()

int ff_sws_op_list_insert_at	(	SwsOpList *	ops,
		int	index,
		SwsOp *	op
	)

Definition at line 714 of file ops.c.

Referenced by ff_sws_op_list_append(), ff_sws_op_list_optimize(), and ff_sws_op_list_subpass().

ff_sws_op_list_append()

int ff_sws_op_list_append	(	SwsOpList *	ops,
		SwsOp *	op
	)

These will take over ownership of op and set it to {0}, even on failure.

Definition at line 728 of file ops.c.

Referenced by ff_sws_op_list_subpass().

ff_sws_op_list_is_noop()

bool ff_sws_op_list_is_noop

(

const SwsOpList *

ops

)

Returns whether an op list represents a true no-op operation, i.e.

may be eliminated entirely from an execution graph.

Note that this check is unlikely to ever be hit in practice, since it would imply the existence of planar formats with different plane orders between them, e.g. rgbap <-> gbrap, which doesn't currently exist. However, the check is cheap and lets me sleep at night.

Definition at line 733 of file ops.c.

Referenced by ff_sws_compile_pass(), and print_passes().

ff_sws_op_list_max_size()

int ff_sws_op_list_max_size

(

const SwsOpList *

ops

)

Returns the size of the largest pixel type used in ops.

Definition at line 762 of file ops.c.

Referenced by aarch64_optimize(), compile(), and register_op().

ff_sws_linear_mask()

uint32_t ff_sws_linear_mask

(

const SwsLinearOp *

c

)

Definition at line 773 of file ops.c.

Referenced by check_linear(), extract_swizzle(), and ff_sws_op_list_optimize().

describe_lin_mask()

static const char* describe_lin_mask ( uint32_t  mask )

static

Definition at line 785 of file ops.c.

Referenced by ff_sws_op_desc().

describe_comp_flags()

static char describe_comp_flags ( SwsCompFlags  flags )

static

Definition at line 826 of file ops.c.

Referenced by ff_sws_op_list_print().

print_q()

static void print_q ( AVBPrint *  bp, const AVRational  q  )

static

Definition at line 840 of file ops.c.

Referenced by ff_sws_op_desc(), and print_q4().

print_q4()

static void print_q4 ( AVBPrint *  bp, const AVRational  q4[4], SwsCompMask  mask  )

static

Definition at line 853 of file ops.c.

Referenced by ff_sws_op_desc(), and ff_sws_op_list_print().

ff_sws_op_desc()

void ff_sws_op_desc	(	AVBPrint *	bp,
		const SwsOp *	op
	)

Describe an operation in human-readable form.

Definition at line 874 of file ops.c.

Referenced by ff_sws_op_list_print().

desc_plane_order()

static void desc_plane_order ( AVBPrint *  bp, int  nb_planes, const uint8_t *  order  )

static

Definition at line 967 of file ops.c.

Referenced by ff_sws_op_list_print().

ff_sws_op_list_print()

void ff_sws_op_list_print	(	void *	log,
		int	lev,
		int	lev_extra,
		const SwsOpList *	ops
	)

Print out the contents of an operation list.

Definition at line 981 of file ops.c.

Referenced by add_ops_convert_pass(), compile_backend(), ff_sws_compile_pass(), and print_ops().

enum_ops_fmt()

static int enum_ops_fmt ( SwsContext *  ctx, void *  opaque, enum AVPixelFormat  src_fmt, enum AVPixelFormat  dst_fmt, int(*)(SwsContext *ctx, void *opaque, SwsOpList *ops)  cb  )

static

Definition at line 1034 of file ops.c.

Referenced by ff_sws_enum_op_lists().

ff_sws_enum_op_lists()

int ff_sws_enum_op_lists	(	SwsContext *	ctx,
		void *	opaque,
		enum AVPixelFormat	src_fmt,
		enum AVPixelFormat	dst_fmt,
		int(*)(SwsContext *ctx, void *opaque, SwsOpList *ops)	cb
	)

Helper function to enumerate over all possible (optimized) operation lists, under the current set of options in ctx, and run the given callback on each list.

Parameters

src_fmt	If set (not AV_PIX_FMT_NONE), constrain the source format
dst_fmt	If set (not AV_PIX_FMT_NONE), constrain the destination format

Returns

0 on success, the return value if cb() < 0, or a negative error code

Note

ops belongs to ff_sws_enum_op_lists(), but may be mutated by cb.

Definition at line 1079 of file ops.c.

Referenced by ff_sws_uops_macros_gen(), and main().

Variable Documentation

backend_c

const SwsOpBackend backend_c

Copyright (C) 2025 Niklas Haas.

This file is part of FFmpeg.

FFmpeg is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

FFmpeg is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with FFmpeg; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Definition at line 193 of file uops_backend.c.

backend_murder

const SwsOpBackend backend_murder

Definition at line 144 of file ops_memcpy.c.

backend_aarch64

const SwsOpBackend backend_aarch64

Definition at line 252 of file ops.c.

backend_x86

const SwsOpBackend backend_x86

Definition at line 665 of file ops.c.

ff_sws_op_backends

const SwsOpBackend* const ff_sws_op_backends[]

Initial value:

= {
    &backend_murder,
 
 
 
 
 
    &backend_c,
 
 
 
 
 
 
    NULL
}

Definition at line 45 of file ops.c.

Referenced by check_ops(), and ff_sws_ops_compile().

rw_mode_names

const char* const rw_mode_names[]

static

Initial value:

= {
    [SWS_RW_PLANAR]     = "planar",
    [SWS_RW_PACKED]     = "packed",
    [SWS_RW_PALETTE]    = "palette"
}

Definition at line 868 of file ops.c.

Referenced by ff_sws_op_desc().