Reindent after last commit.
[libav.git] / libswscale / swscale_internal.h
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5427e242 1/*
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2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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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.
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10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
d026b45e 15 *
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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
b19bcbaa 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
d026b45e 19 */
5427e242 20
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21#ifndef SWSCALE_SWSCALE_INTERNAL_H
22#define SWSCALE_SWSCALE_INTERNAL_H
5427e242 23
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24#include "config.h"
25
b63f641e 26#if HAVE_ALTIVEC_H
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27#include <altivec.h>
28#endif
29
83da2c6f 30#include "libavutil/avutil.h"
94c4def2 31
59ded10c 32#define STR(s) AV_TOSTRING(s) //AV_STRINGIFY is too long
1625216e 33
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34#define MAX_FILTER_SIZE 256
35
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36#if ARCH_X86
37#define VOFW 5120
38#else
39#define VOFW 2048 // faster on PPC and not tested on others
40#endif
41
710af50e 42#define VOF (VOFW*2)
8b2fce0d 43
a898cdc9 44#if HAVE_BIGENDIAN
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45#define ALT32_CORR (-1)
46#else
47#define ALT32_CORR 1
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48#endif
49
b63f641e 50#if ARCH_X86_64
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51# define APCK_PTR2 8
52# define APCK_COEF 16
53# define APCK_SIZE 24
54#else
55# define APCK_PTR2 4
56# define APCK_COEF 8
57# define APCK_SIZE 16
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58#endif
59
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60struct SwsContext;
61
a959e247 62typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t* src[],
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63 int srcStride[], int srcSliceY, int srcSliceH,
64 uint8_t* dst[], int dstStride[]);
5427e242 65
8a322796 66/* This struct should be aligned on at least a 32-byte boundary. */
dd68318c 67typedef struct SwsContext {
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68 /**
69 * info on struct for av_log
70 */
635a8cd2 71 const AVClass *av_class;
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72
73 /**
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74 * Note that src, dst, srcStride, dstStride will be copied in the
75 * sws_scale() wrapper so they can be freely modified here.
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76 */
77 SwsFunc swScale;
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78 int srcW; ///< Width of source luma/alpha planes.
79 int srcH; ///< Height of source luma/alpha planes.
80 int dstH; ///< Height of destination luma/alpha planes.
81 int chrSrcW; ///< Width of source chroma planes.
82 int chrSrcH; ///< Height of source chroma planes.
83 int chrDstW; ///< Width of destination chroma planes.
84 int chrDstH; ///< Height of destination chroma planes.
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85 int lumXInc, chrXInc;
86 int lumYInc, chrYInc;
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87 enum PixelFormat dstFormat; ///< Destination pixel format.
88 enum PixelFormat srcFormat; ///< Source pixel format.
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89 int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
90 int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
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91 int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
92 int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
93 int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
94 int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
95 int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
96 int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
9556124c 97 double param[2]; ///< Input parameters for scaling algorithms that need them.
221b804f 98
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99 uint32_t pal_yuv[256];
100 uint32_t pal_rgb[256];
101
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102 /**
103 * @name Scaled horizontal lines ring buffer.
104 * The horizontal scaler keeps just enough scaled lines in a ring buffer
105 * so they may be passed to the vertical scaler. The pointers to the
106 * allocated buffers for each line are duplicated in sequence in the ring
107 * buffer to simplify indexing and avoid wrapping around between lines
108 * inside the vertical scaler code. The wrapping is done before the
109 * vertical scaler is called.
110 */
111 //@{
112 int16_t **lumPixBuf; ///< Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.
113 int16_t **chrPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
114 int16_t **alpPixBuf; ///< Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.
115 int vLumBufSize; ///< Number of vertical luma/alpha lines allocated in the ring buffer.
116 int vChrBufSize; ///< Number of vertical chroma lines allocated in the ring buffer.
117 int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
118 int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
119 int lumBufIndex; ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
120 int chrBufIndex; ///< Index in ring buffer of the last scaled horizontal chroma line from source.
121 //@}
221b804f 122
8a322796 123 uint8_t formatConvBuffer[VOF]; //FIXME dynamic allocation, but we have to change a lot of code for this to be useful
221b804f 124
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125 /**
126 * @name Horizontal and vertical filters.
127 * To better understand the following fields, here is a pseudo-code of
128 * their usage in filtering a horizontal line:
129 * @code
130 * for (i = 0; i < width; i++) {
131 * dst[i] = 0;
132 * for (j = 0; j < filterSize; j++)
133 * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
134 * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
135 * }
136 * @endcode
137 */
138 //@{
139 int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
140 int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
141 int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
142 int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
143 int16_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
144 int16_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
145 int16_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
146 int16_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
147 int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
148 int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
149 int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
150 int vChrFilterSize; ///< Vertical filter size for chroma pixels.
151 //@}
221b804f 152
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153 int lumMmx2FilterCodeSize; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.
154 int chrMmx2FilterCodeSize; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma planes.
155 uint8_t *lumMmx2FilterCode; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.
156 uint8_t *chrMmx2FilterCode; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma planes.
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157
158 int canMMX2BeUsed;
159
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160 int dstY; ///< Last destination vertical line output from last slice.
161 int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
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162 void * yuvTable; // pointer to the yuv->rgb table start so it can be freed()
163 uint8_t * table_rV[256];
164 uint8_t * table_gU[256];
165 int table_gV[256];
166 uint8_t * table_bU[256];
167
168 //Colorspace stuff
169 int contrast, brightness, saturation; // for sws_getColorspaceDetails
170 int srcColorspaceTable[4];
171 int dstColorspaceTable[4];
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172 int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
173 int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
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174 int yuv2rgb_y_offset;
175 int yuv2rgb_y_coeff;
176 int yuv2rgb_v2r_coeff;
177 int yuv2rgb_v2g_coeff;
178 int yuv2rgb_u2g_coeff;
179 int yuv2rgb_u2b_coeff;
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180
181#define RED_DITHER "0*8"
182#define GREEN_DITHER "1*8"
183#define BLUE_DITHER "2*8"
184#define Y_COEFF "3*8"
185#define VR_COEFF "4*8"
186#define UB_COEFF "5*8"
187#define VG_COEFF "6*8"
188#define UG_COEFF "7*8"
189#define Y_OFFSET "8*8"
190#define U_OFFSET "9*8"
191#define V_OFFSET "10*8"
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192#define LUM_MMX_FILTER_OFFSET "11*8"
193#define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
8a322796 194#define DSTW_OFFSET "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
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195#define ESP_OFFSET "11*8+4*4*256*2+8"
196#define VROUNDER_OFFSET "11*8+4*4*256*2+16"
197#define U_TEMP "11*8+4*4*256*2+24"
198#define V_TEMP "11*8+4*4*256*2+32"
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199#define Y_TEMP "11*8+4*4*256*2+40"
200#define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
221b804f 201
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202 DECLARE_ALIGNED(8, uint64_t, redDither);
203 DECLARE_ALIGNED(8, uint64_t, greenDither);
204 DECLARE_ALIGNED(8, uint64_t, blueDither);
205
206 DECLARE_ALIGNED(8, uint64_t, yCoeff);
207 DECLARE_ALIGNED(8, uint64_t, vrCoeff);
208 DECLARE_ALIGNED(8, uint64_t, ubCoeff);
209 DECLARE_ALIGNED(8, uint64_t, vgCoeff);
210 DECLARE_ALIGNED(8, uint64_t, ugCoeff);
211 DECLARE_ALIGNED(8, uint64_t, yOffset);
212 DECLARE_ALIGNED(8, uint64_t, uOffset);
213 DECLARE_ALIGNED(8, uint64_t, vOffset);
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214 int32_t lumMmxFilter[4*MAX_FILTER_SIZE];
215 int32_t chrMmxFilter[4*MAX_FILTER_SIZE];
5d4d503f 216 int dstW; ///< Width of destination luma/alpha planes.
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217 DECLARE_ALIGNED(8, uint64_t, esp);
218 DECLARE_ALIGNED(8, uint64_t, vRounder);
219 DECLARE_ALIGNED(8, uint64_t, u_temp);
220 DECLARE_ALIGNED(8, uint64_t, v_temp);
221 DECLARE_ALIGNED(8, uint64_t, y_temp);
6858492e 222 int32_t alpMmxFilter[4*MAX_FILTER_SIZE];
a31de956 223
b63f641e 224#if HAVE_ALTIVEC
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225 vector signed short CY;
226 vector signed short CRV;
227 vector signed short CBU;
228 vector signed short CGU;
229 vector signed short CGV;
230 vector signed short OY;
231 vector unsigned short CSHIFT;
232 vector signed short *vYCoeffsBank, *vCCoeffsBank;
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233#endif
234
b63f641e 235#if ARCH_BFIN
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236 DECLARE_ALIGNED(4, uint32_t, oy);
237 DECLARE_ALIGNED(4, uint32_t, oc);
238 DECLARE_ALIGNED(4, uint32_t, zero);
239 DECLARE_ALIGNED(4, uint32_t, cy);
240 DECLARE_ALIGNED(4, uint32_t, crv);
241 DECLARE_ALIGNED(4, uint32_t, rmask);
242 DECLARE_ALIGNED(4, uint32_t, cbu);
243 DECLARE_ALIGNED(4, uint32_t, bmask);
244 DECLARE_ALIGNED(4, uint32_t, cgu);
245 DECLARE_ALIGNED(4, uint32_t, cgv);
246 DECLARE_ALIGNED(4, uint32_t, gmask);
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247#endif
248
b63f641e 249#if HAVE_VIS
4a888526 250 DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10];
90c1d7b4 251#endif
d3f3eea9 252
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253 /* function pointers for swScale() */
254 void (*yuv2nv12X )(struct SwsContext *c,
255 const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
256 const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
257 uint8_t *dest, uint8_t *uDest,
258 int dstW, int chrDstW, int dstFormat);
259 void (*yuv2yuv1 )(struct SwsContext *c,
260 const int16_t *lumSrc, const int16_t *chrSrc, const int16_t *alpSrc,
261 uint8_t *dest,
262 uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
c3ab0004 263 long dstW, long chrDstW);
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264 void (*yuv2yuvX )(struct SwsContext *c,
265 const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
266 const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
267 const int16_t **alpSrc,
268 uint8_t *dest,
269 uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
c3ab0004 270 long dstW, long chrDstW);
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271 void (*yuv2packed1)(struct SwsContext *c,
272 const uint16_t *buf0,
273 const uint16_t *uvbuf0, const uint16_t *uvbuf1,
274 const uint16_t *abuf0,
275 uint8_t *dest,
276 int dstW, int uvalpha, int dstFormat, int flags, int y);
277 void (*yuv2packed2)(struct SwsContext *c,
278 const uint16_t *buf0, const uint16_t *buf1,
279 const uint16_t *uvbuf0, const uint16_t *uvbuf1,
280 const uint16_t *abuf0, const uint16_t *abuf1,
281 uint8_t *dest,
282 int dstW, int yalpha, int uvalpha, int y);
283 void (*yuv2packedX)(struct SwsContext *c,
284 const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
285 const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
286 const int16_t **alpSrc, uint8_t *dest,
c3ab0004 287 long dstW, long dstY);
40fa5140 288
bb53e1d1 289 void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
c3ab0004 290 long width, uint32_t *pal); ///< Unscaled conversion of luma plane to YV12 for horizontal scaler.
bb53e1d1 291 void (*alpToYV12)(uint8_t *dst, const uint8_t *src,
c3ab0004 292 long width, uint32_t *pal); ///< Unscaled conversion of alpha plane to YV12 for horizontal scaler.
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293 void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
294 const uint8_t *src1, const uint8_t *src2,
c3ab0004 295 long width, uint32_t *pal); ///< Unscaled conversion of chroma planes to YV12 for horizontal scaler.
40fa5140 296 void (*hyscale_fast)(struct SwsContext *c,
c3ab0004 297 int16_t *dst, long dstWidth,
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298 const uint8_t *src, int srcW, int xInc);
299 void (*hcscale_fast)(struct SwsContext *c,
c3ab0004 300 int16_t *dst, long dstWidth,
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301 const uint8_t *src1, const uint8_t *src2,
302 int srcW, int xInc);
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303
304 void (*hScale)(int16_t *dst, int dstW, const uint8_t *src, int srcW,
457eed72 305 int xInc, const int16_t *filter, const int16_t *filterPos,
c3ab0004 306 long filterSize);
40fa5140 307
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308 void (*lumConvertRange)(uint16_t *dst, int width); ///< Color range conversion function for luma plane if needed.
309 void (*chrConvertRange)(uint16_t *dst, int width); ///< Color range conversion function for chroma planes if needed.
310
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311 int lumSrcOffset; ///< Offset given to luma src pointers passed to horizontal input functions.
312 int chrSrcOffset; ///< Offset given to chroma src pointers passed to horizontal input functions.
313 int alpSrcOffset; ///< Offset given to alpha src pointers passed to horizontal input functions.
314
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315 int needs_hcscale; ///< Set if there are chroma planes to be converted.
316
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317} SwsContext;
318//FIXME check init (where 0)
5427e242 319
780daf2b 320SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
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321int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
322 int fullRange, int brightness,
323 int contrast, int saturation);
5427e242 324
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325void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
326 int brightness, int contrast, int saturation);
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327SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c);
328SwsFunc ff_yuv2rgb_init_vis(SwsContext *c);
329SwsFunc ff_yuv2rgb_init_mlib(SwsContext *c);
780daf2b 330SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c);
befa8e66 331SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c);
d5e9bc06 332void ff_bfin_get_unscaled_swscale(SwsContext *c);
780daf2b 333void ff_yuv2packedX_altivec(SwsContext *c,
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334 const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
335 const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
457eed72 336 uint8_t *dest, int dstW, int dstY);
c95a3a9f 337
b4b91702 338const char *sws_format_name(enum PixelFormat format);
94c4def2 339
e9e12f0e 340//FIXME replace this with something faster
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341#define is16BPS(x) ( \
342 (x)==PIX_FMT_GRAY16BE \
343 || (x)==PIX_FMT_GRAY16LE \
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344 || (x)==PIX_FMT_RGB48BE \
345 || (x)==PIX_FMT_RGB48LE \
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346 || (x)==PIX_FMT_YUV420P16LE \
347 || (x)==PIX_FMT_YUV422P16LE \
348 || (x)==PIX_FMT_YUV444P16LE \
349 || (x)==PIX_FMT_YUV420P16BE \
350 || (x)==PIX_FMT_YUV422P16BE \
351 || (x)==PIX_FMT_YUV444P16BE \
714f32bf 352 )
c3dc6c5a 353#define isBE(x) ((x)&1)
de1275d5 354#define isPlanar8YUV(x) ( \
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355 (x)==PIX_FMT_YUV410P \
356 || (x)==PIX_FMT_YUV420P \
9621f2f5 357 || (x)==PIX_FMT_YUVA420P \
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358 || (x)==PIX_FMT_YUV411P \
359 || (x)==PIX_FMT_YUV422P \
360 || (x)==PIX_FMT_YUV444P \
9ba7fe6d 361 || (x)==PIX_FMT_YUV440P \
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362 || (x)==PIX_FMT_NV12 \
363 || (x)==PIX_FMT_NV21 \
364 )
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365#define isPlanarYUV(x) ( \
366 isPlanar8YUV(x) \
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367 || (x)==PIX_FMT_YUV420P16LE \
368 || (x)==PIX_FMT_YUV422P16LE \
369 || (x)==PIX_FMT_YUV444P16LE \
370 || (x)==PIX_FMT_YUV420P16BE \
371 || (x)==PIX_FMT_YUV422P16BE \
372 || (x)==PIX_FMT_YUV444P16BE \
de1275d5 373 )
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374#define isYUV(x) ( \
375 (x)==PIX_FMT_UYVY422 \
376 || (x)==PIX_FMT_YUYV422 \
377 || isPlanarYUV(x) \
378 )
379#define isGray(x) ( \
380 (x)==PIX_FMT_GRAY8 \
381 || (x)==PIX_FMT_GRAY16BE \
382 || (x)==PIX_FMT_GRAY16LE \
383 )
384#define isGray16(x) ( \
385 (x)==PIX_FMT_GRAY16BE \
386 || (x)==PIX_FMT_GRAY16LE \
387 )
3b1ee703 388#define isRGBinInt(x) ( \
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389 (x)==PIX_FMT_RGB48BE \
390 || (x)==PIX_FMT_RGB48LE \
391 || (x)==PIX_FMT_RGB32 \
9990e426 392 || (x)==PIX_FMT_RGB32_1 \
9d9de37d 393 || (x)==PIX_FMT_RGB24 \
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394 || (x)==PIX_FMT_RGB565BE \
395 || (x)==PIX_FMT_RGB565LE \
396 || (x)==PIX_FMT_RGB555BE \
397 || (x)==PIX_FMT_RGB555LE \
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398 || (x)==PIX_FMT_RGB444BE \
399 || (x)==PIX_FMT_RGB444LE \
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400 || (x)==PIX_FMT_RGB8 \
401 || (x)==PIX_FMT_RGB4 \
402 || (x)==PIX_FMT_RGB4_BYTE \
403 || (x)==PIX_FMT_MONOBLACK \
ec1bca2a 404 || (x)==PIX_FMT_MONOWHITE \
9d9de37d 405 )
3b1ee703 406#define isBGRinInt(x) ( \
d52337af 407 (x)==PIX_FMT_BGR32 \
9990e426 408 || (x)==PIX_FMT_BGR32_1 \
9d9de37d 409 || (x)==PIX_FMT_BGR24 \
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410 || (x)==PIX_FMT_BGR565BE \
411 || (x)==PIX_FMT_BGR565LE \
412 || (x)==PIX_FMT_BGR555BE \
413 || (x)==PIX_FMT_BGR555LE \
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414 || (x)==PIX_FMT_BGR444BE \
415 || (x)==PIX_FMT_BGR444LE \
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416 || (x)==PIX_FMT_BGR8 \
417 || (x)==PIX_FMT_BGR4 \
418 || (x)==PIX_FMT_BGR4_BYTE \
419 || (x)==PIX_FMT_MONOBLACK \
ec1bca2a 420 || (x)==PIX_FMT_MONOWHITE \
9d9de37d 421 )
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422#define isRGBinBytes(x) ( \
423 (x)==PIX_FMT_RGB48BE \
424 || (x)==PIX_FMT_RGB48LE \
425 || (x)==PIX_FMT_RGBA \
426 || (x)==PIX_FMT_ARGB \
427 || (x)==PIX_FMT_RGB24 \
428 )
429#define isBGRinBytes(x) ( \
430 (x)==PIX_FMT_BGRA \
431 || (x)==PIX_FMT_ABGR \
432 || (x)==PIX_FMT_BGR24 \
433 )
434#define isAnyRGB(x) ( \
435 isRGBinInt(x) \
436 || isBGRinInt(x) \
437 )
c2751600
CS
438#define isALPHA(x) ( \
439 (x)==PIX_FMT_BGR32 \
440 || (x)==PIX_FMT_BGR32_1 \
441 || (x)==PIX_FMT_RGB32 \
442 || (x)==PIX_FMT_RGB32_1 \
443 || (x)==PIX_FMT_YUVA420P \
444 )
3de42635 445#define usePal(x) (av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL)
e9e12f0e 446
43175f50
DB
447extern const uint64_t ff_dither4[2];
448extern const uint64_t ff_dither8[2];
0cb25594 449
e40b183d
LB
450extern const AVClass sws_context_class;
451
a4388ebd
RP
452/**
453 * Sets c->swScale to an unscaled converter if one exists for the specific
454 * source and destination formats, bit depths, flags, etc.
455 */
456void ff_get_unscaled_swscale(SwsContext *c);
457
458/**
459 * Returns the SWS_CPU_CAPS for the optimized code compiled into swscale.
460 */
461int ff_hardcodedcpuflags(void);
462
463/**
464 * Returns function pointer to fastest main scaler path function depending
465 * on architecture and available optimizations.
466 */
467SwsFunc ff_getSwsFunc(SwsContext *c);
468
0eaf5235 469#endif /* SWSCALE_SWSCALE_INTERNAL_H */