/src/ffmpeg/libswscale/uops.h

Source
/**
 * 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
 */

#ifndef SWSCALE_UOPS_H
#define SWSCALE_UOPS_H

#include <assert.h>
#include <stdbool.h>
#include <stdint.h>

/***************************************************************************
 * Note: This header must be usable at build time, to generate asm sources *
 ***************************************************************************/

#include "libavutil/attributes.h"

typedef struct SwsContext       SwsContext;
typedef struct SwsFilterWeights SwsFilterWeights;
typedef struct SwsOpList        SwsOpList;

typedef enum SwsPixelType {
    SWS_PIXEL_NONE = 0,
    SWS_PIXEL_U8,
    SWS_PIXEL_U16,
    SWS_PIXEL_U32,
    SWS_PIXEL_F32,
    SWS_PIXEL_TYPE_NB
} SwsPixelType;

const char *ff_sws_pixel_type_name(SwsPixelType type);
int ff_sws_pixel_type_size(SwsPixelType type) av_const;
bool ff_sws_pixel_type_is_int(SwsPixelType type) av_const;

typedef union SwsPixel {
    char data[4];

    uint8_t  u8;
    uint16_t u16;
    uint32_t u32;
    float    f32;
} SwsPixel;

/* Ensures (SwsPixel) {0} is properly initialized to all zeros */
static_assert(sizeof(SwsPixel) == sizeof(char[4]), "SwsPixel size mismatch");

/**
 * Bit-mask of components. Exact meaning depends on the usage context.
 */
typedef uint8_t SwsCompMask;
enum {
    SWS_COMP_NONE = 0,
    SWS_COMP_ALL  = 0xF,
#define SWS_COMP(X) (1 << (X))
#define SWS_COMP_TEST(mask, X) (!!((mask) & SWS_COMP(X)))
#define SWS_COMP_INV(mask) ((mask) ^ SWS_COMP_ALL)
#define SWS_COMP_ELEMS(N) ((1 << (N)) - 1)
#define SWS_COMP_COUNT(mask) (av_popcount((mask) & SWS_COMP_ALL))
#define SWS_COMP_MASK(X, Y, Z, W)   \
    (((X) ? SWS_COMP(0) : 0) |      \
     ((Y) ? SWS_COMP(1) : 0) |      \
     ((Z) ? SWS_COMP(2) : 0) |      \
     ((W) ? SWS_COMP(3) : 0))
};


#define ff_sws_comp_mask_str(mask) ff_sws_comp_mask_print(mask, (char[5]){0})
static inline char *ff_sws_comp_mask_print(SwsCompMask mask, char buf[5])
{
    char *ptr = buf;
    for (int c = 0; c < 4; c++) {
        if (SWS_COMP_TEST(mask, c))
            *ptr++ = "xyzw"[c];
    }
    *ptr = '\0';
    return buf;
}

typedef uint32_t SwsUOpFlags;
typedef enum SwsUOpFlagBits {
    SWS_UOP_FLAG_NONE = 0,
    SWS_UOP_FLAG_FMA  = (1 << 0), /* platform supports FMA ops */
} SwsUOpFlagBits;

typedef enum SwsUOpType {
    SWS_UOP_INVALID = 0,

    /* Read/write uops; mask = components to read/write */
    SWS_UOP_READ_PLANAR,     /* simple planar byte-aligned read */
    SWS_UOP_READ_PLANAR_FH,  /* planar read with horizontal filter */
    SWS_UOP_READ_PLANAR_FV,  /* planar read with vertical filter */
    SWS_UOP_READ_PLANAR_FV_FMA,
    SWS_UOP_READ_PACKED,     /* simple packed byte-aligned read */
    SWS_UOP_READ_NIBBLE,     /* fractional read (4 bits) from single plane */
    SWS_UOP_READ_BIT,        /* fractional read (1 bit) from single plane */
    SWS_UOP_READ_PALETTE,    /* indexed read from palette in plane 1 */

    SWS_UOP_WRITE_PLANAR,    /* simple planar byte-aligned write */
    SWS_UOP_WRITE_PACKED,    /* simple packed byte-aligned write */
    SWS_UOP_WRITE_NIBBLE,    /* fractional write (4 bits) to single plane */
    SWS_UOP_WRITE_BIT,       /* fractional write (1 bit) to single plane */

    /* Data rearrangement uops; mask = needed or trivial components */
    SWS_UOP_PERMUTE,         /* permute pointers (no duplicates) */
    SWS_UOP_COPY,            /* permute data (may contain duplicates) */

    /* Data conversion / manipulation uops; mask = affected components */
    SWS_UOP_SWAP_BYTES,      /* swap byte order in components */
    SWS_UOP_EXPAND_BIT,      /* expand low-order bit to all bits in type */
    SWS_UOP_EXPAND_PAIR,     /* expand bytes in pairs (16 bit) */
    SWS_UOP_EXPAND_QUAD,     /* expand bytes in quads (32 bit) */
    SWS_UOP_TO_U8,           /* cast pixel values to SWS_PIXEL_U8  */
    SWS_UOP_TO_U16,          /* cast pixel values to SWS_PIXEL_U16 */
    SWS_UOP_TO_U32,          /* cast pixel values to SWS_PIXEL_U32 */
    SWS_UOP_TO_F32,          /* cast pixel values to SWS_PIXEL_F32 */

    /* Arithmetic uops */
    SWS_UOP_SCALE,           /* multiply masked components by scalar */
    SWS_UOP_ADD,             /* add vec4 to masked components */
    SWS_UOP_MIN,             /* min(x, vec4) on masked components */
    SWS_UOP_MAX,             /* max(x, vec4) on masked components */

    /* Identical to corresponding SwsOpType */
    SWS_UOP_UNPACK,          /* mask = nonzero components in pack pattern */
    SWS_UOP_PACK,            /* mask = nonzero components in pack pattern */
    SWS_UOP_LSHIFT,          /* mask = components to shift */
    SWS_UOP_RSHIFT,          /* mask = components to shift */
    SWS_UOP_CLEAR,           /* mask = components to clear */
    SWS_UOP_LINEAR,          /* mask = non-trivial output rows */
    SWS_UOP_LINEAR_FMA,      /* with SWS_UOP_FLAG_FMA */
    SWS_UOP_DITHER,          /* mask = components to dither */

    /* Platform-specific uops would go here */
    SWS_UOP_TYPE_NB,
} SwsUOpType;

typedef struct SwsFilterUOp {
    SwsPixelType type; /* pixel type to store result as */
} SwsFilterUOp;

typedef struct SwsShiftUOp {
    uint8_t amount;
} SwsShiftUOp;

typedef struct SwsMoveUOp {
    /* The worst case number of moves (for two independent cycles) */
    #define SWS_UOP_MOVE_MAX 6
    int num_moves;

    /* This may involve a temporary register (index -1) */
    int8_t dst[SWS_UOP_MOVE_MAX]; /* destination register index */
    int8_t src[SWS_UOP_MOVE_MAX]; /* source register index */
} SwsMoveUOp;

typedef struct SwsPackUOp {
    uint8_t pattern[4]; /* bit depth pattern, from MSB to LSB */
} SwsPackUOp;

typedef struct SwsClearUOp {
    SwsCompMask one;  /* mask of coefficients equal to all 1s */
    SwsCompMask zero; /* mask of coefficients equal to all 0s */
} SwsClearUOp;

typedef struct SwsLinearUOp {
    uint32_t one;  /* mask of coefficients equal to one */
    uint32_t zero; /* mask of coefficients equal to zero */

    /* for SWS_UOP_LINEAR_FMA only */
    uint32_t exact; /* mask of coefficients whose product is exact */
} SwsLinearUOp;

#define SWS_MASK(I, J)  (1 << (5 * (I) + (J)))
#define SWS_MASK_OFF(I) SWS_MASK(I, 4)
#define SWS_MASK_ROW(I) (0x1F << (5 * (I)))
#define SWS_MASK_COL(J) (0x8421 << J)
#define SWS_MASK_DIAG4  (0x41041)

typedef struct SwsDitherUOp {
    uint8_t y_offset[4];
    uint8_t size_log2;
} SwsDitherUOp;

/**
 * Computes (1 << size_log2) + MAX(y_offset). The dither matrix attached to
 * the SwsUOp is always pre-padded to this number of lines.
 */
int ff_sws_dither_height(const SwsDitherUOp *dither);

typedef union SwsUOpParams {
    SwsFilterUOp    filter; /* for SWS_UOP_READ_*_FV/FH */
    SwsShiftUOp     shift;
    SwsMoveUOp      move; /* for SWS_UOP_PERMUTE and SWS_UOP_COPY */
    SwsPackUOp      pack;
    SwsClearUOp     clear;
    SwsLinearUOp    lin;
    SwsDitherUOp    dither;
} SwsUOpParams;

typedef struct SwsUOp {
    /* These fields uniquely identify the uop implementation */
    SwsPixelType type;
    SwsUOpType uop;
    SwsCompMask mask;
    SwsUOpParams par;

    /* Constant data for this uop; not part of the unique identifier */
    union {
        SwsFilterWeights *kernel;   /* refstruct */
        SwsPixel *ptr;              /* refstruct */
        SwsPixel scalar;
        SwsPixel vec4[4];
        SwsPixel mat4[4][5];        /* row major */
        void *opaque;               /* reserved for internal use */
    } data;
} SwsUOp;

/**
 * Compare two SwsUOps for equality (excluding constant data).
 */
int ff_sws_uop_cmp(const SwsUOp *a, const SwsUOp *b);

static inline int ff_sws_uop_cmp_v(const void *a, const void *b)
{
    return ff_sws_uop_cmp(a, b);
}

/**
 * Generate a unique name for a SwsUOp.
 */
#define SWS_UOP_NAME_MAX 64
void ff_sws_uop_name(const SwsUOp *op, char buf[SWS_UOP_NAME_MAX]);

typedef struct SwsUOpList {
    SwsUOp *ops;
    int num_ops;

    /* Additional metadata for implementations */
    SwsCompMask planes_in;  /* mask of planes read from */
    SwsCompMask planes_out; /* mask of planes written to */
    int pixel_size_max;     /* size of largest pixel type seen in any uop */
} SwsUOpList;

SwsUOpList *ff_sws_uop_list_alloc(void);
void ff_sws_uop_list_free(SwsUOpList **ops);

/* Takes over ownership of `uop` and sets it to {0}, even on failure. */
int ff_sws_uop_list_append(SwsUOpList *uops, SwsUOp *uop);

/**
 * Translate a list of operations down to micro-ops, which can be further
 * optimized and then directly executed by backends.
 *
 * Return 0 or a negative error code.
 */
int ff_sws_ops_translate(SwsContext *ctx, const SwsOpList *ops,
                         SwsUOpFlags flags, SwsUOpList *uops);

#endif

Coverage Report

Created: 2026-07-15 07:31

Line	Count	Source
1		/**
2		* Copyright (C) 2025 Niklas Haas
3		*
4		* This file is part of FFmpeg.
5		*
6		* FFmpeg is free software; you can redistribute it and/or
7		* modify it under the terms of the GNU Lesser General Public
8		* License as published by the Free Software Foundation; either
9		* version 2.1 of the License, or (at your option) any later version.
10		*
11		* FFmpeg is distributed in the hope that it will be useful,
12		* but WITHOUT ANY WARRANTY; without even the implied warranty of
13		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14		* Lesser General Public License for more details.
15		*
16		* You should have received a copy of the GNU Lesser General Public
17		* License along with FFmpeg; if not, write to the Free Software
18		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19		*/
20
21		#ifndef SWSCALE_UOPS_H
22		#define SWSCALE_UOPS_H
23
24		#include <assert.h>
25		#include <stdbool.h>
26		#include <stdint.h>
27
28		/***************************************************************************
29		* Note: This header must be usable at build time, to generate asm sources *
30		***************************************************************************/
31
32		#include "libavutil/attributes.h"
33
34		typedef struct SwsContext SwsContext;
35		typedef struct SwsFilterWeights SwsFilterWeights;
36		typedef struct SwsOpList SwsOpList;
37
38		typedef enum SwsPixelType {
39		SWS_PIXEL_NONE = 0,
40		SWS_PIXEL_U8,
41		SWS_PIXEL_U16,
42		SWS_PIXEL_U32,
43		SWS_PIXEL_F32,
44		SWS_PIXEL_TYPE_NB
45		} SwsPixelType;
46
47		const char *ff_sws_pixel_type_name(SwsPixelType type);
48		int ff_sws_pixel_type_size(SwsPixelType type) av_const;
49		bool ff_sws_pixel_type_is_int(SwsPixelType type) av_const;
50
51		typedef union SwsPixel {
52		char data[4];
53
54		uint8_t u8;
55		uint16_t u16;
56		uint32_t u32;
57		float f32;
58		} SwsPixel;
59
60		/* Ensures (SwsPixel) {0} is properly initialized to all zeros */
61		static_assert(sizeof(SwsPixel) == sizeof(char[4]), "SwsPixel size mismatch");
62
63		/**
64		* Bit-mask of components. Exact meaning depends on the usage context.
65		*/
66		typedef uint8_t SwsCompMask;
67		enum {
68		SWS_COMP_NONE = 0,
69		SWS_COMP_ALL = 0xF,
70	0	#define SWS_COMP(X) (1 << (X))
71	0	#define SWS_COMP_TEST(mask, X) (!!((mask) & SWS_COMP(X)))
72		#define SWS_COMP_INV(mask) ((mask) ^ SWS_COMP_ALL)
73	0	#define SWS_COMP_ELEMS(N) ((1 << (N)) - 1)
74		#define SWS_COMP_COUNT(mask) (av_popcount((mask) & SWS_COMP_ALL))
75		#define SWS_COMP_MASK(X, Y, Z, W) \
76	0	(((X) ? SWS_COMP(0) : 0) \| \
77	0	((Y) ? SWS_COMP(1) : 0) \| \
78	0	((Z) ? SWS_COMP(2) : 0) \| \
79	0	((W) ? SWS_COMP(3) : 0))
80		};
81
82
83	0	#define ff_sws_comp_mask_str(mask) ff_sws_comp_mask_print(mask, (char[5]){0})
84		static inline char *ff_sws_comp_mask_print(SwsCompMask mask, char buf[5])
85	0	{
86	0	char *ptr = buf;
87	0	for (int c = 0; c < 4; c++) {
88	0	if (SWS_COMP_TEST(mask, c))
89	0	*ptr++ = "xyzw"[c];
90	0	}
91	0	*ptr = '\0';
92	0	return buf;
93	0	} Unexecuted instantiation: format.c:ff_sws_comp_mask_print Unexecuted instantiation: graph.c:ff_sws_comp_mask_print Unexecuted instantiation: ops.c:ff_sws_comp_mask_print Unexecuted instantiation: ops_dispatch.c:ff_sws_comp_mask_print Unexecuted instantiation: ops_memcpy.c:ff_sws_comp_mask_print Unexecuted instantiation: ops_optimizer.c:ff_sws_comp_mask_print Unexecuted instantiation: uops_backend.c:ff_sws_comp_mask_print Unexecuted instantiation: ops_chain.c:ff_sws_comp_mask_print Unexecuted instantiation: uops.c:ff_sws_comp_mask_print
94
95		typedef uint32_t SwsUOpFlags;
96		typedef enum SwsUOpFlagBits {
97		SWS_UOP_FLAG_NONE = 0,
98		SWS_UOP_FLAG_FMA = (1 << 0), /* platform supports FMA ops */
99		} SwsUOpFlagBits;
100
101		typedef enum SwsUOpType {
102		SWS_UOP_INVALID = 0,
103
104		/* Read/write uops; mask = components to read/write */
105		SWS_UOP_READ_PLANAR, /* simple planar byte-aligned read */
106		SWS_UOP_READ_PLANAR_FH, /* planar read with horizontal filter */
107		SWS_UOP_READ_PLANAR_FV, /* planar read with vertical filter */
108		SWS_UOP_READ_PLANAR_FV_FMA,
109		SWS_UOP_READ_PACKED, /* simple packed byte-aligned read */
110		SWS_UOP_READ_NIBBLE, /* fractional read (4 bits) from single plane */
111		SWS_UOP_READ_BIT, /* fractional read (1 bit) from single plane */
112		SWS_UOP_READ_PALETTE, /* indexed read from palette in plane 1 */
113
114		SWS_UOP_WRITE_PLANAR, /* simple planar byte-aligned write */
115		SWS_UOP_WRITE_PACKED, /* simple packed byte-aligned write */
116		SWS_UOP_WRITE_NIBBLE, /* fractional write (4 bits) to single plane */
117		SWS_UOP_WRITE_BIT, /* fractional write (1 bit) to single plane */
118
119		/* Data rearrangement uops; mask = needed or trivial components */
120		SWS_UOP_PERMUTE, /* permute pointers (no duplicates) */
121		SWS_UOP_COPY, /* permute data (may contain duplicates) */
122
123		/* Data conversion / manipulation uops; mask = affected components */
124		SWS_UOP_SWAP_BYTES, /* swap byte order in components */
125		SWS_UOP_EXPAND_BIT, /* expand low-order bit to all bits in type */
126		SWS_UOP_EXPAND_PAIR, /* expand bytes in pairs (16 bit) */
127		SWS_UOP_EXPAND_QUAD, /* expand bytes in quads (32 bit) */
128		SWS_UOP_TO_U8, /* cast pixel values to SWS_PIXEL_U8 */
129		SWS_UOP_TO_U16, /* cast pixel values to SWS_PIXEL_U16 */
130		SWS_UOP_TO_U32, /* cast pixel values to SWS_PIXEL_U32 */
131		SWS_UOP_TO_F32, /* cast pixel values to SWS_PIXEL_F32 */
132
133		/* Arithmetic uops */
134		SWS_UOP_SCALE, /* multiply masked components by scalar */
135		SWS_UOP_ADD, /* add vec4 to masked components */
136		SWS_UOP_MIN, /* min(x, vec4) on masked components */
137		SWS_UOP_MAX, /* max(x, vec4) on masked components */
138
139		/* Identical to corresponding SwsOpType */
140		SWS_UOP_UNPACK, /* mask = nonzero components in pack pattern */
141		SWS_UOP_PACK, /* mask = nonzero components in pack pattern */
142		SWS_UOP_LSHIFT, /* mask = components to shift */
143		SWS_UOP_RSHIFT, /* mask = components to shift */
144		SWS_UOP_CLEAR, /* mask = components to clear */
145		SWS_UOP_LINEAR, /* mask = non-trivial output rows */
146		SWS_UOP_LINEAR_FMA, /* with SWS_UOP_FLAG_FMA */
147		SWS_UOP_DITHER, /* mask = components to dither */
148
149		/* Platform-specific uops would go here */
150		SWS_UOP_TYPE_NB,
151		} SwsUOpType;
152
153		typedef struct SwsFilterUOp {
154		SwsPixelType type; /* pixel type to store result as */
155		} SwsFilterUOp;
156
157		typedef struct SwsShiftUOp {
158		uint8_t amount;
159		} SwsShiftUOp;
160
161		typedef struct SwsMoveUOp {
162		/* The worst case number of moves (for two independent cycles) */
163		#define SWS_UOP_MOVE_MAX 6
164		int num_moves;
165
166		/* This may involve a temporary register (index -1) */
167		int8_t dst[SWS_UOP_MOVE_MAX]; /* destination register index */
168		int8_t src[SWS_UOP_MOVE_MAX]; /* source register index */
169		} SwsMoveUOp;
170
171		typedef struct SwsPackUOp {
172		uint8_t pattern[4]; /* bit depth pattern, from MSB to LSB */
173		} SwsPackUOp;
174
175		typedef struct SwsClearUOp {
176		SwsCompMask one; /* mask of coefficients equal to all 1s */
177		SwsCompMask zero; /* mask of coefficients equal to all 0s */
178		} SwsClearUOp;
179
180		typedef struct SwsLinearUOp {
181		uint32_t one; /* mask of coefficients equal to one */
182		uint32_t zero; /* mask of coefficients equal to zero */
183
184		/* for SWS_UOP_LINEAR_FMA only */
185		uint32_t exact; /* mask of coefficients whose product is exact */
186		} SwsLinearUOp;
187
188	0	#define SWS_MASK(I, J) (1 << (5 * (I) + (J)))
189		#define SWS_MASK_OFF(I) SWS_MASK(I, 4)
190	0	#define SWS_MASK_ROW(I) (0x1F << (5 * (I)))
191	0	#define SWS_MASK_COL(J) (0x8421 << J)
192	0	#define SWS_MASK_DIAG4 (0x41041)
193
194		typedef struct SwsDitherUOp {
195		uint8_t y_offset[4];
196		uint8_t size_log2;
197		} SwsDitherUOp;
198
199		/**
200		* Computes (1 << size_log2) + MAX(y_offset). The dither matrix attached to
201		* the SwsUOp is always pre-padded to this number of lines.
202		*/
203		int ff_sws_dither_height(const SwsDitherUOp *dither);
204
205		typedef union SwsUOpParams {
206		SwsFilterUOp filter; /* for SWS_UOP_READ__FV/FH /
207		SwsShiftUOp shift;
208		SwsMoveUOp move; /* for SWS_UOP_PERMUTE and SWS_UOP_COPY */
209		SwsPackUOp pack;
210		SwsClearUOp clear;
211		SwsLinearUOp lin;
212		SwsDitherUOp dither;
213		} SwsUOpParams;
214
215		typedef struct SwsUOp {
216		/* These fields uniquely identify the uop implementation */
217		SwsPixelType type;
218		SwsUOpType uop;
219		SwsCompMask mask;
220		SwsUOpParams par;
221
222		/* Constant data for this uop; not part of the unique identifier */
223		union {
224		SwsFilterWeights kernel; / refstruct */
225		SwsPixel ptr; / refstruct */
226		SwsPixel scalar;
227		SwsPixel vec4[4];
228		SwsPixel mat4[4][5]; /* row major */
229		void opaque; / reserved for internal use */
230		} data;
231		} SwsUOp;
232
233		/**
234		* Compare two SwsUOps for equality (excluding constant data).
235		*/
236		int ff_sws_uop_cmp(const SwsUOp a, const SwsUOp b);
237
238		static inline int ff_sws_uop_cmp_v(const void a, const void b)
239	0	{
240	0	return ff_sws_uop_cmp(a, b);
241	0	} Unexecuted instantiation: format.c:ff_sws_uop_cmp_v Unexecuted instantiation: graph.c:ff_sws_uop_cmp_v Unexecuted instantiation: ops.c:ff_sws_uop_cmp_v Unexecuted instantiation: ops_dispatch.c:ff_sws_uop_cmp_v Unexecuted instantiation: ops_memcpy.c:ff_sws_uop_cmp_v Unexecuted instantiation: ops_optimizer.c:ff_sws_uop_cmp_v Unexecuted instantiation: uops_backend.c:ff_sws_uop_cmp_v Unexecuted instantiation: ops_chain.c:ff_sws_uop_cmp_v Unexecuted instantiation: uops.c:ff_sws_uop_cmp_v
242
243		/**
244		* Generate a unique name for a SwsUOp.
245		*/
246	0	#define SWS_UOP_NAME_MAX 64
247		void ff_sws_uop_name(const SwsUOp *op, char buf[SWS_UOP_NAME_MAX]);
248
249		typedef struct SwsUOpList {
250		SwsUOp *ops;
251		int num_ops;
252
253		/* Additional metadata for implementations */
254		SwsCompMask planes_in; /* mask of planes read from */
255		SwsCompMask planes_out; /* mask of planes written to */
256		int pixel_size_max; /* size of largest pixel type seen in any uop */
257		} SwsUOpList;
258
259		SwsUOpList *ff_sws_uop_list_alloc(void);
260		void ff_sws_uop_list_free(SwsUOpList **ops);
261
262		/* Takes over ownership of `uop` and sets it to {0}, even on failure. */
263		int ff_sws_uop_list_append(SwsUOpList uops, SwsUOp uop);
264
265		/**
266		* Translate a list of operations down to micro-ops, which can be further
267		* optimized and then directly executed by backends.
268		*
269		* Return 0 or a negative error code.
270		*/
271		int ff_sws_ops_translate(SwsContext ctx, const SwsOpList ops,
272		SwsUOpFlags flags, SwsUOpList *uops);
273
274		#endif