FFmpeg
swscale_internal.h
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1 /*
2  * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
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_SWSCALE_INTERNAL_H
22 #define SWSCALE_SWSCALE_INTERNAL_H
23 
24 #include <stdatomic.h>
25 
26 #include "config.h"
27 
28 #include "libavutil/avassert.h"
29 #include "libavutil/common.h"
30 #include "libavutil/frame.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/log.h"
33 #include "libavutil/mem_internal.h"
34 #include "libavutil/pixfmt.h"
35 #include "libavutil/pixdesc.h"
36 #include "libavutil/slicethread.h"
37 #if HAVE_ALTIVEC
39 #endif
40 #include "libavutil/half2float.h"
41 
42 #define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
43 
44 #define YUVRGB_TABLE_HEADROOM 512
45 #define YUVRGB_TABLE_LUMA_HEADROOM 512
46 
47 #define MAX_FILTER_SIZE SWS_MAX_FILTER_SIZE
48 
49 #define DITHER1XBPP
50 
51 #if HAVE_BIGENDIAN
52 #define ALT32_CORR (-1)
53 #else
54 #define ALT32_CORR 1
55 #endif
56 
57 #if ARCH_X86_64
58 # define APCK_PTR2 8
59 # define APCK_COEF 16
60 # define APCK_SIZE 24
61 #else
62 # define APCK_PTR2 4
63 # define APCK_COEF 8
64 # define APCK_SIZE 16
65 #endif
66 
67 #define RETCODE_USE_CASCADE -12345
68 
69 struct SwsContext;
70 
71 typedef enum SwsDither {
79 } SwsDither;
80 
81 typedef enum SwsAlphaBlend {
87 
88 typedef struct Range {
89  unsigned int start;
90  unsigned int len;
91 } Range;
92 
93 typedef struct RangeList {
95  unsigned int nb_ranges;
97 } RangeList;
98 
99 int ff_range_add(RangeList *r, unsigned int start, unsigned int len);
100 
101 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[],
102  int srcStride[], int srcSliceY, int srcSliceH,
103  uint8_t *dst[], int dstStride[]);
104 
105 /**
106  * Write one line of horizontally scaled data to planar output
107  * without any additional vertical scaling (or point-scaling).
108  *
109  * @param src scaled source data, 15 bits for 8-10-bit output,
110  * 19 bits for 16-bit output (in int32_t)
111  * @param dest pointer to the output plane. For >8-bit
112  * output, this is in uint16_t
113  * @param dstW width of destination in pixels
114  * @param dither ordered dither array of type int16_t and size 8
115  * @param offset Dither offset
116  */
117 typedef void (*yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW,
118  const uint8_t *dither, int offset);
119 
120 /**
121  * Write one line of horizontally scaled data to planar output
122  * with multi-point vertical scaling between input pixels.
123  *
124  * @param filter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
125  * @param src scaled luma (Y) or alpha (A) source data, 15 bits for
126  * 8-10-bit output, 19 bits for 16-bit output (in int32_t)
127  * @param filterSize number of vertical input lines to scale
128  * @param dest pointer to output plane. For >8-bit
129  * output, this is in uint16_t
130  * @param dstW width of destination pixels
131  * @param offset Dither offset
132  */
133 typedef void (*yuv2planarX_fn)(const int16_t *filter, int filterSize,
134  const int16_t **src, uint8_t *dest, int dstW,
135  const uint8_t *dither, int offset);
136 
137 /**
138  * Write one line of horizontally scaled chroma to interleaved output
139  * with multi-point vertical scaling between input pixels.
140  *
141  * @param dstFormat destination pixel format
142  * @param chrDither ordered dither array of type uint8_t and size 8
143  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
144  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit
145  * output, 19 bits for 16-bit output (in int32_t)
146  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit
147  * output, 19 bits for 16-bit output (in int32_t)
148  * @param chrFilterSize number of vertical chroma input lines to scale
149  * @param dest pointer to the output plane. For >8-bit
150  * output, this is in uint16_t
151  * @param dstW width of chroma planes
152  */
154  const uint8_t *chrDither,
155  const int16_t *chrFilter,
156  int chrFilterSize,
157  const int16_t **chrUSrc,
158  const int16_t **chrVSrc,
159  uint8_t *dest, int dstW);
160 
161 /**
162  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
163  * output without any additional vertical scaling (or point-scaling). Note
164  * that this function may do chroma scaling, see the "uvalpha" argument.
165  *
166  * @param c SWS scaling context
167  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
168  * 19 bits for 16-bit output (in int32_t)
169  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
170  * 19 bits for 16-bit output (in int32_t)
171  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
172  * 19 bits for 16-bit output (in int32_t)
173  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
174  * 19 bits for 16-bit output (in int32_t)
175  * @param dest pointer to the output plane. For 16-bit output, this is
176  * uint16_t
177  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
178  * to write into dest[]
179  * @param uvalpha chroma scaling coefficient for the second line of chroma
180  * pixels, either 2048 or 0. If 0, one chroma input is used
181  * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
182  * is set, it generates 1 output pixel). If 2048, two chroma
183  * input pixels should be averaged for 2 output pixels (this
184  * only happens if SWS_FLAG_FULL_CHR_INT is not set)
185  * @param y vertical line number for this output. This does not need
186  * to be used to calculate the offset in the destination,
187  * but can be used to generate comfort noise using dithering
188  * for some output formats.
189  */
190 typedef void (*yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc,
191  const int16_t *chrUSrc[2],
192  const int16_t *chrVSrc[2],
193  const int16_t *alpSrc, uint8_t *dest,
194  int dstW, int uvalpha, int y);
195 /**
196  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
197  * output by doing bilinear scaling between two input lines.
198  *
199  * @param c SWS scaling context
200  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
201  * 19 bits for 16-bit output (in int32_t)
202  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
203  * 19 bits for 16-bit output (in int32_t)
204  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
205  * 19 bits for 16-bit output (in int32_t)
206  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
207  * 19 bits for 16-bit output (in int32_t)
208  * @param dest pointer to the output plane. For 16-bit output, this is
209  * uint16_t
210  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
211  * to write into dest[]
212  * @param yalpha luma/alpha scaling coefficients for the second input line.
213  * The first line's coefficients can be calculated by using
214  * 4096 - yalpha
215  * @param uvalpha chroma scaling coefficient for the second input line. The
216  * first line's coefficients can be calculated by using
217  * 4096 - uvalpha
218  * @param y vertical line number for this output. This does not need
219  * to be used to calculate the offset in the destination,
220  * but can be used to generate comfort noise using dithering
221  * for some output formats.
222  */
223 typedef void (*yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2],
224  const int16_t *chrUSrc[2],
225  const int16_t *chrVSrc[2],
226  const int16_t *alpSrc[2],
227  uint8_t *dest,
228  int dstW, int yalpha, int uvalpha, int y);
229 /**
230  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
231  * output by doing multi-point vertical scaling between input pixels.
232  *
233  * @param c SWS scaling context
234  * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
235  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
236  * 19 bits for 16-bit output (in int32_t)
237  * @param lumFilterSize number of vertical luma/alpha input lines to scale
238  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
239  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
240  * 19 bits for 16-bit output (in int32_t)
241  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
242  * 19 bits for 16-bit output (in int32_t)
243  * @param chrFilterSize number of vertical chroma input lines to scale
244  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
245  * 19 bits for 16-bit output (in int32_t)
246  * @param dest pointer to the output plane. For 16-bit output, this is
247  * uint16_t
248  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
249  * to write into dest[]
250  * @param y vertical line number for this output. This does not need
251  * to be used to calculate the offset in the destination,
252  * but can be used to generate comfort noise using dithering
253  * or some output formats.
254  */
255 typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
256  const int16_t **lumSrc, int lumFilterSize,
257  const int16_t *chrFilter,
258  const int16_t **chrUSrc,
259  const int16_t **chrVSrc, int chrFilterSize,
260  const int16_t **alpSrc, uint8_t *dest,
261  int dstW, int y);
262 
263 /**
264  * Write one line of horizontally scaled Y/U/V/A to YUV/RGB
265  * output by doing multi-point vertical scaling between input pixels.
266  *
267  * @param c SWS scaling context
268  * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
269  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
270  * 19 bits for 16-bit output (in int32_t)
271  * @param lumFilterSize number of vertical luma/alpha input lines to scale
272  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
273  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
274  * 19 bits for 16-bit output (in int32_t)
275  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
276  * 19 bits for 16-bit output (in int32_t)
277  * @param chrFilterSize number of vertical chroma input lines to scale
278  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
279  * 19 bits for 16-bit output (in int32_t)
280  * @param dest pointer to the output planes. For 16-bit output, this is
281  * uint16_t
282  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
283  * to write into dest[]
284  * @param y vertical line number for this output. This does not need
285  * to be used to calculate the offset in the destination,
286  * but can be used to generate comfort noise using dithering
287  * or some output formats.
288  */
289 typedef void (*yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter,
290  const int16_t **lumSrc, int lumFilterSize,
291  const int16_t *chrFilter,
292  const int16_t **chrUSrc,
293  const int16_t **chrVSrc, int chrFilterSize,
294  const int16_t **alpSrc, uint8_t **dest,
295  int dstW, int y);
296 
297 struct SwsSlice;
298 struct SwsFilterDescriptor;
299 
300 /* This struct should be aligned on at least a 32-byte boundary. */
301 typedef struct SwsContext {
302  /**
303  * info on struct for av_log
304  */
306 
308 
311  int *slice_err;
313 
314  // values passed to current sws_receive_slice() call
317 
318  /**
319  * Note that src, dst, srcStride, dstStride will be copied in the
320  * sws_scale() wrapper so they can be freely modified here.
321  */
323  int srcW; ///< Width of source luma/alpha planes.
324  int srcH; ///< Height of source luma/alpha planes.
325  int dstH; ///< Height of destination luma/alpha planes.
326  int chrSrcW; ///< Width of source chroma planes.
327  int chrSrcH; ///< Height of source chroma planes.
328  int chrDstW; ///< Width of destination chroma planes.
329  int chrDstH; ///< Height of destination chroma planes.
332  enum AVPixelFormat dstFormat; ///< Destination pixel format.
333  enum AVPixelFormat srcFormat; ///< Source pixel format.
334  int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
335  int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
337  int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
338  int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
339  int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
340  int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
341  int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
342  int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
343  int nb_threads; ///< Number of threads used for scaling
344  double param[2]; ///< Input parameters for scaling algorithms that need them.
345 
348 
350 
351  /* The cascaded_* fields allow spliting a scaler task into multiple
352  * sequential steps, this is for example used to limit the maximum
353  * downscaling factor that needs to be supported in one scaler.
354  */
357  uint8_t *cascaded_tmp[4];
359  uint8_t *cascaded1_tmp[4];
361 
362  double gamma_value;
365  uint16_t *gamma;
366  uint16_t *inv_gamma;
367 
368  int numDesc;
369  int descIndex[2];
370  int numSlice;
371  struct SwsSlice *slice;
373 
374  uint32_t pal_yuv[256];
375  uint32_t pal_rgb[256];
376 
377  float uint2float_lut[256];
378 
379  /**
380  * @name Scaled horizontal lines ring buffer.
381  * The horizontal scaler keeps just enough scaled lines in a ring buffer
382  * so they may be passed to the vertical scaler. The pointers to the
383  * allocated buffers for each line are duplicated in sequence in the ring
384  * buffer to simplify indexing and avoid wrapping around between lines
385  * inside the vertical scaler code. The wrapping is done before the
386  * vertical scaler is called.
387  */
388  //@{
389  int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
390  int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
391  //@}
392 
395 
396  /**
397  * @name Horizontal and vertical filters.
398  * To better understand the following fields, here is a pseudo-code of
399  * their usage in filtering a horizontal line:
400  * @code
401  * for (i = 0; i < width; i++) {
402  * dst[i] = 0;
403  * for (j = 0; j < filterSize; j++)
404  * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
405  * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
406  * }
407  * @endcode
408  */
409  //@{
410  int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
411  int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
412  int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
413  int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
414  int32_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
415  int32_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
416  int32_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
417  int32_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
418  int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
419  int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
420  int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
421  int vChrFilterSize; ///< Vertical filter size for chroma pixels.
422  //@}
423 
424  int lumMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes.
425  int chrMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
426  uint8_t *lumMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
427  uint8_t *chrMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
428 
431 
432  int dstY; ///< Last destination vertical line output from last slice.
433  int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
434  void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
435  // alignment ensures the offset can be added in a single
436  // instruction on e.g. ARM
438  uint8_t *table_rV[256 + 2*YUVRGB_TABLE_HEADROOM];
439  uint8_t *table_gU[256 + 2*YUVRGB_TABLE_HEADROOM];
440  uint8_t *table_bU[256 + 2*YUVRGB_TABLE_HEADROOM];
441  DECLARE_ALIGNED(16, int32_t, input_rgb2yuv_table)[16+40*4]; // This table can contain both C and SIMD formatted values, the C vales are always at the XY_IDX points
442 #define RY_IDX 0
443 #define GY_IDX 1
444 #define BY_IDX 2
445 #define RU_IDX 3
446 #define GU_IDX 4
447 #define BU_IDX 5
448 #define RV_IDX 6
449 #define GV_IDX 7
450 #define BV_IDX 8
451 #define RGB2YUV_SHIFT 15
452 
453  int *dither_error[4];
454 
455  //Colorspace stuff
456  int contrast, brightness, saturation; // for sws_getColorspaceDetails
459  int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
460  int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
463  int srcXYZ;
464  int dstXYZ;
475 
476 #define RED_DITHER "0*8"
477 #define GREEN_DITHER "1*8"
478 #define BLUE_DITHER "2*8"
479 #define Y_COEFF "3*8"
480 #define VR_COEFF "4*8"
481 #define UB_COEFF "5*8"
482 #define VG_COEFF "6*8"
483 #define UG_COEFF "7*8"
484 #define Y_OFFSET "8*8"
485 #define U_OFFSET "9*8"
486 #define V_OFFSET "10*8"
487 #define LUM_MMX_FILTER_OFFSET "11*8"
488 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)
489 #define DSTW_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2"
490 #define ESP_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+8"
491 #define VROUNDER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+16"
492 #define U_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+24"
493 #define V_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+32"
494 #define Y_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+40"
495 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+48"
496 #define UV_OFF_PX "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+48"
497 #define UV_OFF_BYTE "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+56"
498 #define DITHER16 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+64"
499 #define DITHER32 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+80"
500 #define DITHER32_INT (11*8+4*4*MAX_FILTER_SIZE*3+80) // value equal to above, used for checking that the struct hasn't been changed by mistake
501 
502  DECLARE_ALIGNED(8, uint64_t, redDither);
505 
506  DECLARE_ALIGNED(8, uint64_t, yCoeff);
507  DECLARE_ALIGNED(8, uint64_t, vrCoeff);
508  DECLARE_ALIGNED(8, uint64_t, ubCoeff);
509  DECLARE_ALIGNED(8, uint64_t, vgCoeff);
510  DECLARE_ALIGNED(8, uint64_t, ugCoeff);
511  DECLARE_ALIGNED(8, uint64_t, yOffset);
512  DECLARE_ALIGNED(8, uint64_t, uOffset);
513  DECLARE_ALIGNED(8, uint64_t, vOffset);
516  int dstW; ///< Width of destination luma/alpha planes.
517  DECLARE_ALIGNED(8, uint64_t, esp);
518  DECLARE_ALIGNED(8, uint64_t, vRounder);
519  DECLARE_ALIGNED(8, uint64_t, u_temp);
520  DECLARE_ALIGNED(8, uint64_t, v_temp);
521  DECLARE_ALIGNED(8, uint64_t, y_temp);
523  // alignment of these values is not necessary, but merely here
524  // to maintain the same offset across x8632 and x86-64. Once we
525  // use proper offset macros in the asm, they can be removed.
526  DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes
527  DECLARE_ALIGNED(8, ptrdiff_t, uv_offx2); ///< offset (in bytes) between u and v planes
528  DECLARE_ALIGNED(8, uint16_t, dither16)[8];
529  DECLARE_ALIGNED(8, uint32_t, dither32)[8];
530 
531  const uint8_t *chrDither8, *lumDither8;
532 
533 #if HAVE_ALTIVEC
534  vector signed short CY;
535  vector signed short CRV;
536  vector signed short CBU;
537  vector signed short CGU;
538  vector signed short CGV;
539  vector signed short OY;
540  vector unsigned short CSHIFT;
541  vector signed short *vYCoeffsBank, *vCCoeffsBank;
542 #endif
543 
545 
546 /* pre defined color-spaces gamma */
547 #define XYZ_GAMMA (2.6f)
548 #define RGB_GAMMA (2.2f)
549  int16_t *xyzgamma;
550  int16_t *rgbgamma;
551  int16_t *xyzgammainv;
552  int16_t *rgbgammainv;
553  int16_t xyz2rgb_matrix[3][4];
554  int16_t rgb2xyz_matrix[3][4];
555 
556  /* function pointers for swscale() */
564 
565  /// Opaque data pointer passed to all input functions.
567 
568  /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
569  void (*lumToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
570  int width, uint32_t *pal, void *opq);
571  /// Unscaled conversion of alpha plane to YV12 for horizontal scaler.
572  void (*alpToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
573  int width, uint32_t *pal, void *opq);
574  /// Unscaled conversion of chroma planes to YV12 for horizontal scaler.
575  void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
576  const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
577  int width, uint32_t *pal, void *opq);
578 
579  /**
580  * Functions to read planar input, such as planar RGB, and convert
581  * internally to Y/UV/A.
582  */
583  /** @{ */
584  void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv,
585  void *opq);
586  void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4],
587  int width, int32_t *rgb2yuv, void *opq);
588  void (*readAlpPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv,
589  void *opq);
590  /** @} */
591 
592  /**
593  * Scale one horizontal line of input data using a bilinear filter
594  * to produce one line of output data. Compared to SwsContext->hScale(),
595  * please take note of the following caveats when using these:
596  * - Scaling is done using only 7 bits instead of 14-bit coefficients.
597  * - You can use no more than 5 input pixels to produce 4 output
598  * pixels. Therefore, this filter should not be used for downscaling
599  * by more than ~20% in width (because that equals more than 5/4th
600  * downscaling and thus more than 5 pixels input per 4 pixels output).
601  * - In general, bilinear filters create artifacts during downscaling
602  * (even when <20%), because one output pixel will span more than one
603  * input pixel, and thus some pixels will need edges of both neighbor
604  * pixels to interpolate the output pixel. Since you can use at most
605  * two input pixels per output pixel in bilinear scaling, this is
606  * impossible and thus downscaling by any size will create artifacts.
607  * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
608  * in SwsContext->flags.
609  */
610  /** @{ */
611  void (*hyscale_fast)(struct SwsContext *c,
612  int16_t *dst, int dstWidth,
613  const uint8_t *src, int srcW, int xInc);
614  void (*hcscale_fast)(struct SwsContext *c,
615  int16_t *dst1, int16_t *dst2, int dstWidth,
616  const uint8_t *src1, const uint8_t *src2,
617  int srcW, int xInc);
618  /** @} */
619 
620  /**
621  * Scale one horizontal line of input data using a filter over the input
622  * lines, to produce one (differently sized) line of output data.
623  *
624  * @param dst pointer to destination buffer for horizontally scaled
625  * data. If the number of bits per component of one
626  * destination pixel (SwsContext->dstBpc) is <= 10, data
627  * will be 15 bpc in 16 bits (int16_t) width. Else (i.e.
628  * SwsContext->dstBpc == 16), data will be 19bpc in
629  * 32 bits (int32_t) width.
630  * @param dstW width of destination image
631  * @param src pointer to source data to be scaled. If the number of
632  * bits per component of a source pixel (SwsContext->srcBpc)
633  * is 8, this is 8bpc in 8 bits (uint8_t) width. Else
634  * (i.e. SwsContext->dstBpc > 8), this is native depth
635  * in 16 bits (uint16_t) width. In other words, for 9-bit
636  * YUV input, this is 9bpc, for 10-bit YUV input, this is
637  * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
638  * @param filter filter coefficients to be used per output pixel for
639  * scaling. This contains 14bpp filtering coefficients.
640  * Guaranteed to contain dstW * filterSize entries.
641  * @param filterPos position of the first input pixel to be used for
642  * each output pixel during scaling. Guaranteed to
643  * contain dstW entries.
644  * @param filterSize the number of input coefficients to be used (and
645  * thus the number of input pixels to be used) for
646  * creating a single output pixel. Is aligned to 4
647  * (and input coefficients thus padded with zeroes)
648  * to simplify creating SIMD code.
649  */
650  /** @{ */
651  void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
652  const uint8_t *src, const int16_t *filter,
653  const int32_t *filterPos, int filterSize);
654  void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
655  const uint8_t *src, const int16_t *filter,
656  const int32_t *filterPos, int filterSize);
657  /** @} */
658 
659  /// Color range conversion function for luma plane if needed.
660  void (*lumConvertRange)(int16_t *dst, int width);
661  /// Color range conversion function for chroma planes if needed.
662  void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width);
663 
664  int needs_hcscale; ///< Set if there are chroma planes to be converted.
665 
667 
669 
670  // scratch buffer for converting packed rgb0 sources
671  // filled with a copy of the input frame + fully opaque alpha,
672  // then passed as input to further conversion
673  uint8_t *rgb0_scratch;
675 
676  // scratch buffer for converting XYZ sources
677  // filled with the input converted to rgb48
678  // then passed as input to further conversion
679  uint8_t *xyz_scratch;
680  unsigned int xyz_scratch_allocated;
681 
682  unsigned int dst_slice_align;
685 
687 } SwsContext;
688 //FIXME check init (where 0)
689 
691 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
692  int fullRange, int brightness,
693  int contrast, int saturation);
694 void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4],
695  int brightness, int contrast, int saturation);
696 
698 
703 
707 
709 {
711  av_assert0(desc);
712  return desc->comp[0].depth == 16;
713 }
714 
716 {
718  av_assert0(desc);
719  return desc->comp[0].depth == 32;
720 }
721 
723 {
725  av_assert0(desc);
726  return desc->comp[0].depth >= 9 && desc->comp[0].depth <= 14;
727 }
728 
730 {
732  av_assert0(desc);
733  return desc->flags & AV_PIX_FMT_FLAG_BE;
734 }
735 
737 {
739  av_assert0(desc);
740  return !(desc->flags & AV_PIX_FMT_FLAG_RGB) && desc->nb_components >= 2;
741 }
742 
744 {
746  av_assert0(desc);
747  return ((desc->flags & AV_PIX_FMT_FLAG_PLANAR) && isYUV(pix_fmt));
748 }
749 
750 /*
751  * Identity semi-planar YUV formats. Specifically, those are YUV formats
752  * where the second and third components (U & V) are on the same plane.
753  */
755 {
757  av_assert0(desc);
758  return (isPlanarYUV(pix_fmt) && desc->comp[1].plane == desc->comp[2].plane);
759 }
760 
762 {
764  av_assert0(desc);
765  return (desc->flags & AV_PIX_FMT_FLAG_RGB);
766 }
767 
769 {
771  av_assert0(desc);
772  return !(desc->flags & AV_PIX_FMT_FLAG_PAL) &&
773  !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL) &&
774  desc->nb_components <= 2 &&
777 }
778 
780 {
781  return pix_fmt == AV_PIX_FMT_RGB48BE ||
799 }
800 
802 {
803  return pix_fmt == AV_PIX_FMT_BGR48BE ||
821 }
822 
824 {
826  av_assert0(desc);
827  return !!(desc->flags & AV_PIX_FMT_FLAG_BAYER);
828 }
829 
831 {
833  av_assert0(desc);
834  return desc->comp[1].depth == 8;
835 }
836 
838 {
840  av_assert0(desc);
841  return (desc->flags & AV_PIX_FMT_FLAG_RGB) ||
843 }
844 
846 {
848  av_assert0(desc);
849  return desc->flags & AV_PIX_FMT_FLAG_FLOAT;
850 }
851 
853 {
855  av_assert0(desc);
856  return (desc->flags & AV_PIX_FMT_FLAG_FLOAT) && desc->comp[0].depth == 16;
857 }
858 
860 {
862  av_assert0(desc);
863  if (pix_fmt == AV_PIX_FMT_PAL8)
864  return 1;
865  return desc->flags & AV_PIX_FMT_FLAG_ALPHA;
866 }
867 
869 {
871  av_assert0(desc);
872  return (desc->nb_components >= 2 && !(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) ||
875 }
876 
878 {
880  av_assert0(desc);
881  return (desc->nb_components >= 2 && (desc->flags & AV_PIX_FMT_FLAG_PLANAR));
882 }
883 
885 {
887  av_assert0(desc);
889 }
890 
892 {
894  av_assert0(desc);
895  return ((desc->flags & (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB)) ==
897 }
898 
900 {
901  switch (pix_fmt) {
902  case AV_PIX_FMT_PAL8:
904  case AV_PIX_FMT_BGR8:
905  case AV_PIX_FMT_GRAY8:
907  case AV_PIX_FMT_RGB8:
908  return 1;
909  default:
910  return 0;
911  }
912 }
913 
914 /*
915  * Identity formats where the data is in the high bits, and the low bits are shifted away.
916  */
918 {
919  int i;
921  av_assert0(desc);
923  return 0;
924  for (i = 0; i < desc->nb_components; i++) {
925  if (!desc->comp[i].shift)
926  return 0;
927  if ((desc->comp[i].shift + desc->comp[i].depth) & 0x7)
928  return 0;
929  }
930  return 1;
931 }
932 
933 /*
934  * Identity formats where the chroma planes are swapped (CrCb order).
935  */
937 {
939  av_assert0(desc);
940  if (!isYUV(pix_fmt))
941  return 0;
942  if ((desc->flags & AV_PIX_FMT_FLAG_ALPHA) && desc->nb_components < 4)
943  return 0;
944  if (desc->nb_components < 3)
945  return 0;
947  return desc->comp[1].offset > desc->comp[2].offset;
948  else
949  return desc->comp[1].plane > desc->comp[2].plane;
950 }
951 
952 extern const uint64_t ff_dither4[2];
953 extern const uint64_t ff_dither8[2];
954 
955 extern const uint8_t ff_dither_2x2_4[3][8];
956 extern const uint8_t ff_dither_2x2_8[3][8];
957 extern const uint8_t ff_dither_4x4_16[5][8];
958 extern const uint8_t ff_dither_8x8_32[9][8];
959 extern const uint8_t ff_dither_8x8_73[9][8];
960 extern const uint8_t ff_dither_8x8_128[9][8];
961 extern const uint8_t ff_dither_8x8_220[9][8];
962 
963 extern const int32_t ff_yuv2rgb_coeffs[11][4];
964 
965 extern const AVClass ff_sws_context_class;
966 
967 /**
968  * Set c->convert_unscaled to an unscaled converter if one exists for the
969  * specific source and destination formats, bit depths, flags, etc.
970  */
975 
977 
994 
995 void ff_hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,
996  const uint8_t *src, int srcW, int xInc);
997 void ff_hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2,
998  int dstWidth, const uint8_t *src1,
999  const uint8_t *src2, int srcW, int xInc);
1000 int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode,
1001  int16_t *filter, int32_t *filterPos,
1002  int numSplits);
1003 void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst,
1004  int dstWidth, const uint8_t *src,
1005  int srcW, int xInc);
1006 void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2,
1007  int dstWidth, const uint8_t *src1,
1008  const uint8_t *src2, int srcW, int xInc);
1009 
1010 int ff_sws_alphablendaway(SwsContext *c, const uint8_t *src[],
1011  int srcStride[], int srcSliceY, int srcSliceH,
1012  uint8_t *dst[], int dstStride[]);
1013 
1014 static inline void fillPlane16(uint8_t *plane, int stride, int width, int height, int y,
1015  int alpha, int bits, const int big_endian)
1016 {
1017  uint8_t *ptr = plane + stride * y;
1018  int v = alpha ? 0xFFFF>>(16-bits) : (1<<(bits-1));
1019  if (big_endian != HAVE_BIGENDIAN)
1020  v = av_bswap16(v);
1021  for (int i = 0; i < height; i++) {
1022  for (int j = 0; j < width; j++)
1023  AV_WN16(ptr + 2 * j, v);
1024  ptr += stride;
1025  }
1026 }
1027 
1028 static inline void fillPlane32(uint8_t *plane, int stride, int width, int height, int y,
1029  int alpha, int bits, const int big_endian, int is_float)
1030 {
1031  uint8_t *ptr = plane + stride * y;
1032  uint32_t v;
1033  uint32_t onef32 = 0x3f800000;
1034  if (is_float)
1035  v = alpha ? onef32 : 0;
1036  else
1037  v = alpha ? 0xFFFFFFFF>>(32-bits) : (1<<(bits-1));
1038  if (big_endian != HAVE_BIGENDIAN)
1039  v = av_bswap32(v);
1040 
1041  for (int i = 0; i < height; i++) {
1042  for (int j = 0; j < width; j++)
1043  AV_WN32(ptr + 4 * j, v);
1044  ptr += stride;
1045  }
1046 }
1047 
1048 
1049 #define MAX_SLICE_PLANES 4
1050 
1051 /// Slice plane
1052 typedef struct SwsPlane
1053 {
1054  int available_lines; ///< max number of lines that can be hold by this plane
1055  int sliceY; ///< index of first line
1056  int sliceH; ///< number of lines
1057  uint8_t **line; ///< line buffer
1058  uint8_t **tmp; ///< Tmp line buffer used by mmx code
1059 } SwsPlane;
1060 
1061 /**
1062  * Struct which defines a slice of an image to be scaled or an output for
1063  * a scaled slice.
1064  * A slice can also be used as intermediate ring buffer for scaling steps.
1065  */
1066 typedef struct SwsSlice
1067 {
1068  int width; ///< Slice line width
1069  int h_chr_sub_sample; ///< horizontal chroma subsampling factor
1070  int v_chr_sub_sample; ///< vertical chroma subsampling factor
1071  int is_ring; ///< flag to identify if this slice is a ring buffer
1072  int should_free_lines; ///< flag to identify if there are dynamic allocated lines
1073  enum AVPixelFormat fmt; ///< planes pixel format
1074  SwsPlane plane[MAX_SLICE_PLANES]; ///< color planes
1075 } SwsSlice;
1076 
1077 /**
1078  * Struct which holds all necessary data for processing a slice.
1079  * A processing step can be a color conversion or horizontal/vertical scaling.
1080  */
1081 typedef struct SwsFilterDescriptor
1082 {
1083  SwsSlice *src; ///< Source slice
1084  SwsSlice *dst; ///< Output slice
1085 
1086  int alpha; ///< Flag for processing alpha channel
1087  void *instance; ///< Filter instance data
1088 
1089  /// Function for processing input slice sliceH lines starting from line sliceY
1090  int (*process)(SwsContext *c, struct SwsFilterDescriptor *desc, int sliceY, int sliceH);
1092 
1093 // warp input lines in the form (src + width*i + j) to slice format (line[i][j])
1094 // relative=true means first line src[x][0] otherwise first line is src[x][lum/crh Y]
1095 int ff_init_slice_from_src(SwsSlice * s, uint8_t *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH, int relative);
1096 
1097 // Initialize scaler filter descriptor chain
1099 
1100 // Free all filter data
1102 
1103 /*
1104  function for applying ring buffer logic into slice s
1105  It checks if the slice can hold more @lum lines, if yes
1106  do nothing otherwise remove @lum least used lines.
1107  It applies the same procedure for @chr lines.
1108 */
1109 int ff_rotate_slice(SwsSlice *s, int lum, int chr);
1110 
1111 /// initializes gamma conversion descriptor
1113 
1114 /// initializes lum pixel format conversion descriptor
1116 
1117 /// initializes lum horizontal scaling descriptor
1118 int ff_init_desc_hscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc);
1119 
1120 /// initializes chr pixel format conversion descriptor
1122 
1123 /// initializes chr horizontal scaling descriptor
1124 int ff_init_desc_chscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc);
1125 
1127 
1128 /// initializes vertical scaling descriptors
1130 
1131 /// setup vertical scaler functions
1133  yuv2interleavedX_fn yuv2nv12cX, yuv2packed1_fn yuv2packed1, yuv2packed2_fn yuv2packed2,
1134  yuv2packedX_fn yuv2packedX, yuv2anyX_fn yuv2anyX, int use_mmx);
1135 
1136 void ff_sws_slice_worker(void *priv, int jobnr, int threadnr,
1137  int nb_jobs, int nb_threads);
1138 
1139 //number of extra lines to process
1140 #define MAX_LINES_AHEAD 4
1141 
1142 //shuffle filter and filterPos for hyScale and hcScale filters in avx2
1143 int ff_shuffle_filter_coefficients(SwsContext *c, int* filterPos, int filterSize, int16_t *filter, int dstW);
1144 #endif /* SWSCALE_SWSCALE_INTERNAL_H */
isBayer
static av_always_inline int isBayer(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:823
ff_sws_init_swscale_ppc
void ff_sws_init_swscale_ppc(SwsContext *c)
Definition: swscale_altivec.c:232
SwsContext::is_internal_gamma
int is_internal_gamma
Definition: swscale_internal.h:364
SwsContext::lastInChrBuf
int lastInChrBuf
Last scaled horizontal chroma line from source in the ring buffer.
Definition: swscale_internal.h:390
yuv2packed2_fn
void(* yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2], const int16_t *chrUSrc[2], const int16_t *chrVSrc[2], const int16_t *alpSrc[2], uint8_t *dest, int dstW, int yalpha, int uvalpha, int y)
Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output by doing bilinear scalin...
Definition: swscale_internal.h:223
SwsContext::flags
int flags
Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc....
Definition: swscale_internal.h:433
SwsContext::vLumFilterSize
int vLumFilterSize
Vertical filter size for luma/alpha pixels.
Definition: swscale_internal.h:420
SwsContext::saturation
int saturation
Definition: swscale_internal.h:456
SwsContext::vOffset
uint64_t vOffset
Definition: swscale_internal.h:513
yuv2planar1_fn
void(* yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
Write one line of horizontally scaled data to planar output without any additional vertical scaling (...
Definition: swscale_internal.h:117
ff_yuv2rgb_c_init_tables
int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange, int brightness, int contrast, int saturation)
Definition: yuv2rgb.c:775
SwsFilterDescriptor::process
int(* process)(SwsContext *c, struct SwsFilterDescriptor *desc, int sliceY, int sliceH)
Function for processing input slice sliceH lines starting from line sliceY.
Definition: swscale_internal.h:1090
yuv2packed1_fn
void(* yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc, const int16_t *chrUSrc[2], const int16_t *chrVSrc[2], const int16_t *alpSrc, uint8_t *dest, int dstW, int uvalpha, int y)
Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output without any additional v...
Definition: swscale_internal.h:190
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
ff_dither_8x8_128
const uint8_t ff_dither_8x8_128[9][8]
Definition: swscale.c:38
AV_PIX_FMT_BGR48LE
@ AV_PIX_FMT_BGR48LE
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:146
SwsContext::chrSrcW
int chrSrcW
Width of source chroma planes.
Definition: swscale_internal.h:326
isPlanarRGB
static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:891
SwsPlane::sliceH
int sliceH
number of lines
Definition: swscale_internal.h:1056
ff_sws_slice_worker
void ff_sws_slice_worker(void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
Definition: swscale.c:1221
isRGB
static av_always_inline int isRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:761
Half2FloatTables
Definition: half2float.h:27
isPacked
static av_always_inline int isPacked(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:868
SwsPlane::line
uint8_t ** line
line buffer
Definition: swscale_internal.h:1057
r
const char * r
Definition: vf_curves.c:127
SWS_ALPHA_BLEND_NONE
@ SWS_ALPHA_BLEND_NONE
Definition: swscale_internal.h:82
SwsContext::formatConvBuffer
uint8_t * formatConvBuffer
Definition: swscale_internal.h:393
AV_PIX_FMT_BGRA64BE
@ AV_PIX_FMT_BGRA64BE
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:204
SwsContext::dstW
int dstW
Width of destination luma/alpha planes.
Definition: swscale_internal.h:516
ff_dither_8x8_220
const uint8_t ff_dither_8x8_220[9][8]
Definition: output.c:84
mem_internal.h
ff_sws_init_swscale_vsx
void ff_sws_init_swscale_vsx(SwsContext *c)
Definition: swscale_vsx.c:2019
SwsContext::dstFormatBpp
int dstFormatBpp
Number of bits per pixel of the destination pixel format.
Definition: swscale_internal.h:334
SwsContext::cascaded1_tmp
uint8_t * cascaded1_tmp[4]
Definition: swscale_internal.h:359
SwsContext::rgbgamma
int16_t * rgbgamma
Definition: swscale_internal.h:550
SWS_DITHER_BAYER
@ SWS_DITHER_BAYER
Definition: swscale_internal.h:74
AV_PIX_FMT_BGR32
#define AV_PIX_FMT_BGR32
Definition: pixfmt.h:453
AV_PIX_FMT_RGB444LE
@ AV_PIX_FMT_RGB444LE
packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), little-endian, X=unused/undefined
Definition: pixfmt.h:136
isPlanarYUV
static av_always_inline int isPlanarYUV(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:743
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2965
SwsContext::dstY
int dstY
Last destination vertical line output from last slice.
Definition: swscale_internal.h:432
ff_sws_init_swscale_x86
void ff_sws_init_swscale_x86(SwsContext *c)
Definition: swscale.c:489
SwsContext::cascaded_mainindex
int cascaded_mainindex
Definition: swscale_internal.h:360
SwsContext::alphablend
SwsAlphaBlend alphablend
Definition: swscale_internal.h:668
src1
const pixel * src1
Definition: h264pred_template.c:421
SwsContext::chrDither8
const uint8_t * chrDither8
Definition: swscale_internal.h:531
SwsContext::cascaded1_tmpStride
int cascaded1_tmpStride[4]
Definition: swscale_internal.h:358
SwsContext::yOffset
uint64_t yOffset
Definition: swscale_internal.h:511
SwsContext::vrCoeff
uint64_t vrCoeff
Definition: swscale_internal.h:507
RangeList::ranges_allocated
int ranges_allocated
Definition: swscale_internal.h:96
ff_sws_init_swscale_loongarch
void ff_sws_init_swscale_loongarch(SwsContext *c)
Definition: swscale_init_loongarch.c:61
SwsContext::hChrFilterPos
int32_t * hChrFilterPos
Array of horizontal filter starting positions for each dst[i] for chroma planes.
Definition: swscale_internal.h:415
AV_PIX_FMT_FLAG_FLOAT
#define AV_PIX_FMT_FLAG_FLOAT
The pixel format contains IEEE-754 floating point values.
Definition: pixdesc.h:158
SwsSlice::plane
SwsPlane plane[MAX_SLICE_PLANES]
color planes
Definition: swscale_internal.h:1074
SwsContext::xyz_scratch
uint8_t * xyz_scratch
Definition: swscale_internal.h:679
SWS_DITHER_A_DITHER
@ SWS_DITHER_A_DITHER
Definition: swscale_internal.h:76
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:374
pixdesc.h
AV_PIX_FMT_RGBA64BE
@ AV_PIX_FMT_RGBA64BE
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:202
SwsContext::ubCoeff
uint64_t ubCoeff
Definition: swscale_internal.h:508
SwsContext::dstColorspaceTable
int dstColorspaceTable[4]
Definition: swscale_internal.h:458
isGray
static av_always_inline int isGray(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:768
ff_rotate_slice
int ff_rotate_slice(SwsSlice *s, int lum, int chr)
Definition: slice.c:120
SwsContext::vChrFilter
int16_t * vChrFilter
Array of vertical filter coefficients for chroma planes.
Definition: swscale_internal.h:413
SwsContext::lumMmxFilter
int32_t lumMmxFilter[4 *MAX_FILTER_SIZE]
Definition: swscale_internal.h:514
SWS_ALPHA_BLEND_NB
@ SWS_ALPHA_BLEND_NB
Definition: swscale_internal.h:85
ff_sws_alphablendaway
int ff_sws_alphablendaway(SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
Definition: alphablend.c:23
SwsContext::chrDstVSubSample
int chrDstVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination i...
Definition: swscale_internal.h:340
ff_sws_init_input_funcs
void ff_sws_init_input_funcs(SwsContext *c)
SwsContext::vLumFilter
int16_t * vLumFilter
Array of vertical filter coefficients for luma/alpha planes.
Definition: swscale_internal.h:412
ff_init_slice_from_src
int ff_init_slice_from_src(SwsSlice *s, uint8_t *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH, int relative)
Definition: slice.c:148
SwsFilterDescriptor
Struct which holds all necessary data for processing a slice.
Definition: swscale_internal.h:1081
yuv2planeX
static void FUNC() yuv2planeX(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
Definition: swscale_ppc_template.c:84
table
static const uint16_t table[]
Definition: prosumer.c:203
ff_sws_init_scale
void ff_sws_init_scale(SwsContext *c)
Definition: swscale.c:591
SwsContext::av_class
const AVClass * av_class
info on struct for av_log
Definition: swscale_internal.h:305
AV_PIX_FMT_MONOWHITE
@ AV_PIX_FMT_MONOWHITE
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:82
rgb2yuv
static const char rgb2yuv[]
Definition: vf_scale_vulkan.c:70
atomic_int
intptr_t atomic_int
Definition: stdatomic.h:55
AV_PIX_FMT_RGB32_1
#define AV_PIX_FMT_RGB32_1
Definition: pixfmt.h:452
SwsContext::yuv2planeX
yuv2planarX_fn yuv2planeX
Definition: swscale_internal.h:558
filter
void(* filter)(uint8_t *src, int stride, int qscale)
Definition: h263dsp.c:29
SwsContext::redDither
uint64_t redDither
Definition: swscale_internal.h:502
SwsContext::yuv2plane1
yuv2planar1_fn yuv2plane1
Definition: swscale_internal.h:557
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:76
SwsContext::nb_threads
int nb_threads
Number of threads used for scaling.
Definition: swscale_internal.h:343
SwsContext::srcRange
int srcRange
0 = MPG YUV range, 1 = JPG YUV range (source image).
Definition: swscale_internal.h:459
SwsContext::lumDither8
const uint8_t * lumDither8
Definition: swscale_internal.h:531
ff_get_unscaled_swscale_aarch64
void ff_get_unscaled_swscale_aarch64(SwsContext *c)
Definition: swscale_unscaled.c:124
SwsContext::needAlpha
int needAlpha
Definition: swscale_internal.h:394
SwsContext::xyzgamma
int16_t * xyzgamma
Definition: swscale_internal.h:549
SwsContext::pal_rgb
uint32_t pal_rgb[256]
Definition: swscale_internal.h:375
AVSliceThread
struct AVSliceThread AVSliceThread
Definition: slicethread.h:22
SwsContext::yuv2anyX
yuv2anyX_fn yuv2anyX
Definition: swscale_internal.h:563
AV_PIX_FMT_RGB555BE
@ AV_PIX_FMT_RGB555BE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:114
SwsContext::cascaded_tmp
uint8_t * cascaded_tmp[4]
Definition: swscale_internal.h:357
SwsSlice::fmt
enum AVPixelFormat fmt
planes pixel format
Definition: swscale_internal.h:1073
SwsFilterDescriptor::src
SwsSlice * src
Source slice.
Definition: swscale_internal.h:1083
SwsContext::dst_slice_align
unsigned int dst_slice_align
Definition: swscale_internal.h:682
Range::start
unsigned int start
Definition: swscale_internal.h:89
SwsContext::alpToYV12
void(* alpToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal, void *opq)
Unscaled conversion of alpha plane to YV12 for horizontal scaler.
Definition: swscale_internal.h:572
SwsContext::src0Alpha
int src0Alpha
Definition: swscale_internal.h:461
SwsContext::yuv2nv12cX
yuv2interleavedX_fn yuv2nv12cX
Definition: swscale_internal.h:559
SwsDither
SwsDither
Definition: swscale_internal.h:71
is16BPS
static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:708
SwsFilterDescriptor::instance
void * instance
Filter instance data.
Definition: swscale_internal.h:1087
SwsFunc
int(* SwsFunc)(struct SwsContext *context, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
Definition: swscale_internal.h:101
SwsContext::yuvTable
void * yuvTable
Definition: swscale_internal.h:434
yuv2anyX_fn
void(* yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize, const int16_t *chrFilter, const int16_t **chrUSrc, const int16_t **chrVSrc, int chrFilterSize, const int16_t **alpSrc, uint8_t **dest, int dstW, int y)
Write one line of horizontally scaled Y/U/V/A to YUV/RGB output by doing multi-point vertical scaling...
Definition: swscale_internal.h:289
SwsContext::use_mmx_vfilter
int use_mmx_vfilter
Definition: swscale_internal.h:544
SwsContext::hcscale_fast
void(* hcscale_fast)(struct SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth, const uint8_t *src1, const uint8_t *src2, int srcW, int xInc)
Definition: swscale_internal.h:614
SwsContext::rgbgammainv
int16_t * rgbgammainv
Definition: swscale_internal.h:552
SwsContext::src_v_chr_pos
int src_v_chr_pos
Definition: swscale_internal.h:467
SwsContext::xyz2rgb_matrix
int16_t xyz2rgb_matrix[3][4]
Definition: swscale_internal.h:553
AV_PIX_FMT_FLAG_HWACCEL
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:128
Range::len
unsigned int len
Definition: swscale_internal.h:90
ff_hyscale_fast_c
void ff_hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)
Definition: hscale_fast_bilinear.c:23
ff_dither_2x2_8
const uint8_t ff_dither_2x2_8[3][8]
Definition: output.c:45
ff_sws_init_range_convert_loongarch
av_cold void ff_sws_init_range_convert_loongarch(SwsContext *c)
Definition: swscale_init_loongarch.c:27
ff_hcscale_fast_c
void ff_hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth, const uint8_t *src1, const uint8_t *src2, int srcW, int xInc)
Definition: hscale_fast_bilinear.c:38
isNBPS
static av_always_inline int isNBPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:722
SwsContext::rgb0_scratch_allocated
unsigned int rgb0_scratch_allocated
Definition: swscale_internal.h:674
SwsContext::hLumFilterSize
int hLumFilterSize
Horizontal filter size for luma/alpha pixels.
Definition: swscale_internal.h:418
SwsContext::srcBpc
int srcBpc
Definition: swscale_internal.h:336
SwsSlice::h_chr_sub_sample
int h_chr_sub_sample
horizontal chroma subsampling factor
Definition: swscale_internal.h:1069
SwsContext::gamma_value
double gamma_value
Definition: swscale_internal.h:362
ff_sws_init_range_convert_aarch64
av_cold void ff_sws_init_range_convert_aarch64(SwsContext *c)
Definition: swscale.c:223
SwsContext::dstXYZ
int dstXYZ
Definition: swscale_internal.h:464
SwsContext::lumYInc
int lumYInc
Definition: swscale_internal.h:331
ff_dither4
const uint64_t ff_dither4[2]
Definition: swscale.c:33
ff_dither_8x8_73
const uint8_t ff_dither_8x8_73[9][8]
Definition: output.c:71
ff_sws_init_range_convert
av_cold void ff_sws_init_range_convert(SwsContext *c)
Definition: swscale.c:534
SwsContext::dither_error
int * dither_error[4]
Definition: swscale_internal.h:453
MAX_FILTER_SIZE
#define MAX_FILTER_SIZE
Definition: swscale_internal.h:47
AV_PIX_FMT_BGR8
@ AV_PIX_FMT_BGR8
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:90
avassert.h
ff_hcscale_fast_mmxext
void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth, const uint8_t *src1, const uint8_t *src2, int srcW, int xInc)
SwsContext::table_gV
int table_gV[256+2 *YUVRGB_TABLE_HEADROOM]
Definition: swscale_internal.h:437
SwsContext::srcFormat
enum AVPixelFormat srcFormat
Source pixel format.
Definition: swscale_internal.h:333
av_cold
#define av_cold
Definition: attributes.h:90
SwsContext::uv_off
ptrdiff_t uv_off
offset (in pixels) between u and v planes
Definition: swscale_internal.h:526
SwsContext::chrSrcH
int chrSrcH
Height of source chroma planes.
Definition: swscale_internal.h:327
SwsContext::table_bU
uint8_t * table_bU[256+2 *YUVRGB_TABLE_HEADROOM]
Definition: swscale_internal.h:440
YUVRGB_TABLE_HEADROOM
#define YUVRGB_TABLE_HEADROOM
Definition: swscale_internal.h:44
SwsContext::dst_slice_height
int dst_slice_height
Definition: swscale_internal.h:316
ff_get_unscaled_swscale_arm
void ff_get_unscaled_swscale_arm(SwsContext *c)
Definition: swscale_unscaled.c:183
SwsContext::lumMmxextFilterCodeSize
int lumMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes.
Definition: swscale_internal.h:424
SwsContext::dither
SwsDither dither
Definition: swscale_internal.h:666
SWS_DITHER_ED
@ SWS_DITHER_ED
Definition: swscale_internal.h:75
width
#define width
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
SwsContext::ugCoeff
uint64_t ugCoeff
Definition: swscale_internal.h:510
SwsContext::brightness
int brightness
Definition: swscale_internal.h:456
ff_dither_8x8_32
const uint8_t ff_dither_8x8_32[9][8]
Definition: output.c:59
CSHIFT
#define CSHIFT
Definition: audiogen.c:72
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demux_decode.c:41
SwsSlice::width
int width
Slice line width.
Definition: swscale_internal.h:1068
SwsContext::lumConvertRange
void(* lumConvertRange)(int16_t *dst, int width)
Color range conversion function for luma plane if needed.
Definition: swscale_internal.h:660
bits
uint8_t bits
Definition: vp3data.h:128
ff_yuv2rgb_init_x86
SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
Definition: yuv2rgb.c:68
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
SwsPlane::tmp
uint8_t ** tmp
Tmp line buffer used by mmx code.
Definition: swscale_internal.h:1058
AV_PIX_FMT_FLAG_ALPHA
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:147
ff_sws_context_class
const AVClass ff_sws_context_class
Definition: options.c:88
AV_PIX_FMT_RGB4
@ AV_PIX_FMT_RGB4
packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in ...
Definition: pixfmt.h:94
SwsContext::hcScale
void(* hcScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
Definition: swscale_internal.h:654
ff_init_vscale_pfn
void ff_init_vscale_pfn(SwsContext *c, yuv2planar1_fn yuv2plane1, yuv2planarX_fn yuv2planeX, yuv2interleavedX_fn yuv2nv12cX, yuv2packed1_fn yuv2packed1, yuv2packed2_fn yuv2packed2, yuv2packedX_fn yuv2packedX, yuv2anyX_fn yuv2anyX, int use_mmx)
setup vertical scaler functions
Definition: vscale.c:258
SwsContext::contrast
int contrast
Definition: swscale_internal.h:456
SwsContext::lumXInc
int lumXInc
Definition: swscale_internal.h:330
AV_PIX_FMT_BGR32_1
#define AV_PIX_FMT_BGR32_1
Definition: pixfmt.h:454
SwsContext::vLumFilterPos
int32_t * vLumFilterPos
Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
Definition: swscale_internal.h:416
SwsContext::vRounder
uint64_t vRounder
Definition: swscale_internal.h:518
SwsContext::dstFormat
enum AVPixelFormat dstFormat
Destination pixel format.
Definition: swscale_internal.h:332
ff_init_hscaler_mmxext
int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
SwsContext::yuv2rgb_y_offset
int yuv2rgb_y_offset
Definition: swscale_internal.h:469
SwsContext::dst_slice_start
int dst_slice_start
Definition: swscale_internal.h:315
isSemiPlanarYUV
static av_always_inline int isSemiPlanarYUV(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:754
context
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your context
Definition: writing_filters.txt:91
SwsContext::slice_err
int * slice_err
Definition: swscale_internal.h:311
SwsContext::yuv2packed2
yuv2packed2_fn yuv2packed2
Definition: swscale_internal.h:561
SWS_DITHER_NONE
@ SWS_DITHER_NONE
Definition: swscale_internal.h:72
AV_PIX_FMT_RGB565LE
@ AV_PIX_FMT_RGB565LE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:113
ff_get_unscaled_swscale
void ff_get_unscaled_swscale(SwsContext *c)
Set c->convert_unscaled to an unscaled converter if one exists for the specific source and destinatio...
Definition: swscale_unscaled.c:1974
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
ff_sws_init_swscale_aarch64
void ff_sws_init_swscale_aarch64(SwsContext *c)
Definition: swscale.c:238
SwsContext::xyzgammainv
int16_t * xyzgammainv
Definition: swscale_internal.h:551
isFloat16
static av_always_inline int isFloat16(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:852
SwsPlane::available_lines
int available_lines
max number of lines that can be hold by this plane
Definition: swscale_internal.h:1054
SWS_ALPHA_BLEND_UNIFORM
@ SWS_ALPHA_BLEND_UNIFORM
Definition: swscale_internal.h:83
SwsContext::yuv2rgb_v2g_coeff
int yuv2rgb_v2g_coeff
Definition: swscale_internal.h:472
SwsContext::gamma_flag
int gamma_flag
Definition: swscale_internal.h:363
SwsContext::dstBpc
int dstBpc
Definition: swscale_internal.h:336
SwsContext::convert_unscaled
SwsFunc convert_unscaled
Note that src, dst, srcStride, dstStride will be copied in the sws_scale() wrapper so they can be fre...
Definition: swscale_internal.h:322
SwsContext::slicethread
AVSliceThread * slicethread
Definition: swscale_internal.h:309
AV_PIX_FMT_RGB48LE
@ AV_PIX_FMT_RGB48LE
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:110
SwsContext::lumMmxextFilterCode
uint8_t * lumMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
Definition: swscale_internal.h:426
AV_PIX_FMT_MONOBLACK
@ AV_PIX_FMT_MONOBLACK
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:83
RangeList
Definition: swscale_internal.h:93
NB_SWS_DITHER
@ NB_SWS_DITHER
Definition: swscale_internal.h:78
AV_PIX_FMT_BGR565LE
@ AV_PIX_FMT_BGR565LE
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
Definition: pixfmt.h:118
AV_PIX_FMT_RGBA64LE
@ AV_PIX_FMT_RGBA64LE
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:203
SwsPlane
Slice plane.
Definition: swscale_internal.h:1052
SwsContext::greenDither
uint64_t greenDither
Definition: swscale_internal.h:503
SwsContext::blueDither
uint64_t blueDither
Definition: swscale_internal.h:504
RangeList::nb_ranges
unsigned int nb_ranges
Definition: swscale_internal.h:95
ff_init_desc_hscale
int ff_init_desc_hscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int *filter_pos, int filter_size, int xInc)
initializes lum horizontal scaling descriptor
Definition: hscale.c:145
AV_PIX_FMT_RGB8
@ AV_PIX_FMT_RGB8
packed RGB 3:3:2, 8bpp, (msb)3R 3G 2B(lsb)
Definition: pixfmt.h:93
SwsContext::rgb2xyz_matrix
int16_t rgb2xyz_matrix[3][4]
Definition: swscale_internal.h:554
AV_PIX_FMT_BGR4
@ AV_PIX_FMT_BGR4
packed RGB 1:2:1 bitstream, 4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in ...
Definition: pixfmt.h:91
SwsContext::alpMmxFilter
int32_t alpMmxFilter[4 *MAX_FILTER_SIZE]
Definition: swscale_internal.h:522
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:81
AV_PIX_FMT_BGR555BE
@ AV_PIX_FMT_BGR555BE
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:119
SwsContext::yuv2rgb_v2r_coeff
int yuv2rgb_v2r_coeff
Definition: swscale_internal.h:471
ff_init_desc_no_chr
int ff_init_desc_no_chr(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst)
Definition: hscale.c:282
SwsContext::dst_h_chr_pos
int dst_h_chr_pos
Definition: swscale_internal.h:466
Range
Definition: vf_colorbalance.c:37
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
SwsContext::readChrPlanar
void(* readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width, int32_t *rgb2yuv, void *opq)
Definition: swscale_internal.h:586
AV_PIX_FMT_BGR4_BYTE
@ AV_PIX_FMT_BGR4_BYTE
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
Definition: pixfmt.h:92
ff_range_add
int ff_range_add(RangeList *r, unsigned int start, unsigned int len)
Definition: utils.c:2573
isDataInHighBits
static av_always_inline int isDataInHighBits(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:917
SwsContext::vChrFilterPos
int32_t * vChrFilterPos
Array of vertical filter starting positions for each dst[i] for chroma planes.
Definition: swscale_internal.h:417
isBE
static av_always_inline int isBE(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:729
SwsContext::sliceDir
int sliceDir
Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
Definition: swscale_internal.h:342
SwsContext::src_ranges
RangeList src_ranges
Definition: swscale_internal.h:349
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:75
SwsContext::chrSrcVSubSample
int chrSrcVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
Definition: swscale_internal.h:338
SwsContext::yuv2rgb_u2g_coeff
int yuv2rgb_u2g_coeff
Definition: swscale_internal.h:473
SwsContext::hLumFilterPos
int32_t * hLumFilterPos
Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
Definition: swscale_internal.h:414
SwsFilterDescriptor::dst
SwsSlice * dst
Output slice.
Definition: swscale_internal.h:1084
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem_internal.h:109
ff_shuffle_filter_coefficients
int ff_shuffle_filter_coefficients(SwsContext *c, int *filterPos, int filterSize, int16_t *filter, int dstW)
Definition: utils.c:301
AV_WN32
#define AV_WN32(p, v)
Definition: intreadwrite.h:370
AV_PIX_FMT_FLAG_RGB
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:136
fillPlane16
static void fillPlane16(uint8_t *plane, int stride, int width, int height, int y, int alpha, int bits, const int big_endian)
Definition: swscale_internal.h:1014
usePal
static av_always_inline int usePal(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:899
SwsContext::v_temp
uint64_t v_temp
Definition: swscale_internal.h:520
av_bswap32
#define av_bswap32
Definition: bswap.h:47
isAnyRGB
static av_always_inline int isAnyRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:837
AV_PIX_FMT_RGB444BE
@ AV_PIX_FMT_RGB444BE
packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), big-endian, X=unused/undefined
Definition: pixfmt.h:137
SwsContext::srcFormatBpp
int srcFormatBpp
Number of bits per pixel of the source pixel format.
Definition: swscale_internal.h:335
SwsContext::srcColorspaceTable
int srcColorspaceTable[4]
Definition: swscale_internal.h:457
SwsContext::desc
struct SwsFilterDescriptor * desc
Definition: swscale_internal.h:372
SwsContext::slice_ctx
struct SwsContext ** slice_ctx
Definition: swscale_internal.h:310
SwsContext::srcH
int srcH
Height of source luma/alpha planes.
Definition: swscale_internal.h:324
srcSliceH
return srcSliceH
Definition: yuv2rgb_template.c:87
ff_init_desc_chscale
int ff_init_desc_chscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int *filter_pos, int filter_size, int xInc)
initializes chr horizontal scaling descriptor
Definition: hscale.c:251
isYUV
static av_always_inline int isYUV(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:736
AV_PIX_FMT_FLAG_BITSTREAM
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:124
ff_init_desc_cfmt_convert
int ff_init_desc_cfmt_convert(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint32_t *pal)
initializes chr pixel format conversion descriptor
Definition: hscale.c:236
SwsAlphaBlend
SwsAlphaBlend
Definition: swscale_internal.h:81
SwsContext::hyScale
void(* hyScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
Scale one horizontal line of input data using a filter over the input lines, to produce one (differen...
Definition: swscale_internal.h:651
frame.h
AV_PIX_FMT_BGR444BE
@ AV_PIX_FMT_BGR444BE
packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), big-endian, X=unused/undefined
Definition: pixfmt.h:139
ff_yuv2rgb_get_func_ptr
SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
Definition: yuv2rgb.c:677
SwsContext::uOffset
uint64_t uOffset
Definition: swscale_internal.h:512
is32BPS
static av_always_inline int is32BPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:715
SwsContext::dither32
uint32_t dither32[8]
Definition: swscale_internal.h:529
height
#define height
AV_PIX_FMT_RGB32
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:451
isBGRinInt
static av_always_inline int isBGRinInt(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:801
ff_yuv2rgb_init_ppc
SwsFunc ff_yuv2rgb_init_ppc(SwsContext *c)
Definition: yuv2rgb_altivec.c:535
SwsContext::chrMmxextFilterCodeSize
int chrMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
Definition: swscale_internal.h:425
SwsContext::hLumFilter
int16_t * hLumFilter
Array of horizontal filter coefficients for luma/alpha planes.
Definition: swscale_internal.h:410
isSwappedChroma
static av_always_inline int isSwappedChroma(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:936
AV_PIX_FMT_BGR565BE
@ AV_PIX_FMT_BGR565BE
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
Definition: pixfmt.h:117
SwsContext::yuv2packedX
yuv2packedX_fn yuv2packedX
Definition: swscale_internal.h:562
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
SwsContext::vChrFilterSize
int vChrFilterSize
Vertical filter size for chroma pixels.
Definition: swscale_internal.h:421
SwsContext::y_temp
uint64_t y_temp
Definition: swscale_internal.h:521
fillPlane32
static void fillPlane32(uint8_t *plane, int stride, int width, int height, int y, int alpha, int bits, const int big_endian, int is_float)
Definition: swscale_internal.h:1028
slicethread.h
half2float.h
AV_PIX_FMT_FLAG_BAYER
#define AV_PIX_FMT_FLAG_BAYER
The pixel format is following a Bayer pattern.
Definition: pixdesc.h:152
ff_init_gamma_convert
int ff_init_gamma_convert(SwsFilterDescriptor *desc, SwsSlice *src, uint16_t *table)
initializes gamma conversion descriptor
Definition: gamma.c:59
AV_PIX_FMT_BGRA64LE
@ AV_PIX_FMT_BGRA64LE
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:205
SwsContext::frame_src
AVFrame * frame_src
Definition: swscale_internal.h:346
SwsContext::srcW
int srcW
Width of source luma/alpha planes.
Definition: swscale_internal.h:323
AV_PIX_FMT_RGB555LE
@ AV_PIX_FMT_RGB555LE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined
Definition: pixfmt.h:115
SwsContext::yuv2rgb_u2b_coeff
int yuv2rgb_u2b_coeff
Definition: swscale_internal.h:474
AV_PIX_FMT_RGB48BE
@ AV_PIX_FMT_RGB48BE
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:109
ff_yuv2rgb_coeffs
const int32_t ff_yuv2rgb_coeffs[11][4]
Definition: yuv2rgb.c:47
log.h
SwsContext::nb_slice_ctx
int nb_slice_ctx
Definition: swscale_internal.h:312
SwsContext::readLumPlanar
void(* readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv, void *opq)
Functions to read planar input, such as planar RGB, and convert internally to Y/UV/A.
Definition: swscale_internal.h:584
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
SwsContext::dither16
uint16_t dither16[8]
Definition: swscale_internal.h:528
SwsContext::dstRange
int dstRange
0 = MPG YUV range, 1 = JPG YUV range (destination image).
Definition: swscale_internal.h:460
SwsContext::numSlice
int numSlice
Definition: swscale_internal.h:370
src2
const pixel * src2
Definition: h264pred_template.c:422
ff_sws_init_range_convert_x86
av_cold void ff_sws_init_range_convert_x86(SwsContext *c)
Definition: swscale.c:477
common.h
SwsSlice::should_free_lines
int should_free_lines
flag to identify if there are dynamic allocated lines
Definition: swscale_internal.h:1072
av_always_inline
#define av_always_inline
Definition: attributes.h:49
yuv2interleavedX_fn
void(* yuv2interleavedX_fn)(enum AVPixelFormat dstFormat, const uint8_t *chrDither, const int16_t *chrFilter, int chrFilterSize, const int16_t **chrUSrc, const int16_t **chrVSrc, uint8_t *dest, int dstW)
Write one line of horizontally scaled chroma to interleaved output with multi-point vertical scaling ...
Definition: swscale_internal.h:153
AV_PIX_FMT_FLAG_BE
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:116
SwsSlice::is_ring
int is_ring
flag to identify if this slice is a ring buffer
Definition: swscale_internal.h:1071
len
int len
Definition: vorbis_enc_data.h:426
SwsContext::hChrFilter
int16_t * hChrFilter
Array of horizontal filter coefficients for chroma planes.
Definition: swscale_internal.h:411
ff_sws_init_swscale_riscv
void ff_sws_init_swscale_riscv(SwsContext *c)
Definition: swscale.c:68
SwsSlice::v_chr_sub_sample
int v_chr_sub_sample
vertical chroma subsampling factor
Definition: swscale_internal.h:1070
AV_PIX_FMT_RGB4_BYTE
@ AV_PIX_FMT_RGB4_BYTE
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
Definition: pixfmt.h:95
SwsSlice
Struct which defines a slice of an image to be scaled or an output for a scaled slice.
Definition: swscale_internal.h:1066
ff_init_filters
int ff_init_filters(SwsContext *c)
Definition: slice.c:249
isFloat
static av_always_inline int isFloat(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:845
RangeList::ranges
Range * ranges
Definition: swscale_internal.h:94
SwsContext::chrYInc
int chrYInc
Definition: swscale_internal.h:331
stride
#define stride
Definition: h264pred_template.c:537
SwsContext::slice
struct SwsSlice * slice
Definition: swscale_internal.h:371
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:84
SwsFilterDescriptor::alpha
int alpha
Flag for processing alpha channel.
Definition: swscale_internal.h:1086
SwsContext::srcXYZ
int srcXYZ
Definition: swscale_internal.h:463
pixfmt.h
ff_dither8
const uint64_t ff_dither8[2]
Definition: swscale.c:37
SwsContext::yuv2rgb_y_coeff
int yuv2rgb_y_coeff
Definition: swscale_internal.h:470
SWS_ALPHA_BLEND_CHECKERBOARD
@ SWS_ALPHA_BLEND_CHECKERBOARD
Definition: swscale_internal.h:84
SwsContext::numDesc
int numDesc
Definition: swscale_internal.h:368
SwsContext::table_rV
uint8_t * table_rV[256+2 *YUVRGB_TABLE_HEADROOM]
Definition: swscale_internal.h:438
SwsContext::chrDstH
int chrDstH
Height of destination chroma planes.
Definition: swscale_internal.h:329
SwsContext::xyz_scratch_allocated
unsigned int xyz_scratch_allocated
Definition: swscale_internal.h:680
ff_free_filters
int ff_free_filters(SwsContext *c)
Definition: slice.c:389
ff_get_unscaled_swscale_ppc
void ff_get_unscaled_swscale_ppc(SwsContext *c)
Definition: yuv2yuv_altivec.c:187
SwsContext::input_rgb2yuv_table
int32_t input_rgb2yuv_table[16+40 *4]
Definition: swscale_internal.h:441
yuv2planarX_fn
void(* yuv2planarX_fn)(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
Write one line of horizontally scaled data to planar output with multi-point vertical scaling between...
Definition: swscale_internal.h:133
ff_sws_init_output_funcs
void ff_sws_init_output_funcs(SwsContext *c, yuv2planar1_fn *yuv2plane1, yuv2planarX_fn *yuv2planeX, yuv2interleavedX_fn *yuv2nv12cX, yuv2packed1_fn *yuv2packed1, yuv2packed2_fn *yuv2packed2, yuv2packedX_fn *yuv2packedX, yuv2anyX_fn *yuv2anyX)
SwsContext::inv_gamma
uint16_t * inv_gamma
Definition: swscale_internal.h:366
MAX_SLICE_PLANES
#define MAX_SLICE_PLANES
Definition: swscale_internal.h:1049
isPackedRGB
static av_always_inline int isPackedRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:884
SwsContext::cascaded_tmpStride
int cascaded_tmpStride[4]
Definition: swscale_internal.h:356
SwsContext::table_gU
uint8_t * table_gU[256+2 *YUVRGB_TABLE_HEADROOM]
Definition: swscale_internal.h:439
yuv2packedX_fn
void(* yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize, const int16_t *chrFilter, const int16_t **chrUSrc, const int16_t **chrVSrc, int chrFilterSize, const int16_t **alpSrc, uint8_t *dest, int dstW, int y)
Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output by doing multi-point ver...
Definition: swscale_internal.h:255
SwsContext::frame_dst
AVFrame * frame_dst
Definition: swscale_internal.h:347
SwsContext::chrXInc
int chrXInc
Definition: swscale_internal.h:330
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:132
SwsContext::dst0Alpha
int dst0Alpha
Definition: swscale_internal.h:462
SwsContext::readAlpPlanar
void(* readAlpPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv, void *opq)
Definition: swscale_internal.h:588
SwsContext::warned_unuseable_bilinear
int warned_unuseable_bilinear
Definition: swscale_internal.h:430
AV_PIX_FMT_RGB565BE
@ AV_PIX_FMT_RGB565BE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
Definition: pixfmt.h:112
SwsContext::chrMmxFilter
int32_t chrMmxFilter[4 *MAX_FILTER_SIZE]
Definition: swscale_internal.h:515
ff_hyscale_fast_mmxext
void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)
SwsContext::yCoeff
uint64_t yCoeff
Definition: swscale_internal.h:506
desc
const char * desc
Definition: libsvtav1.c:79
isBayer16BPS
static av_always_inline int isBayer16BPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:830
ff_init_vscale
int ff_init_vscale(SwsContext *c, SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst)
initializes vertical scaling descriptors
Definition: vscale.c:214
SwsPlane::sliceY
int sliceY
index of first line
Definition: swscale_internal.h:1055
SwsContext::input_opaque
void * input_opaque
Opaque data pointer passed to all input functions.
Definition: swscale_internal.h:566
SwsContext::hChrFilterSize
int hChrFilterSize
Horizontal filter size for chroma pixels.
Definition: swscale_internal.h:419
SwsContext::vChrDrop
int vChrDrop
Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user...
Definition: swscale_internal.h:341
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
AV_PIX_FMT_BGR555LE
@ AV_PIX_FMT_BGR555LE
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), little-endian, X=unused/undefined
Definition: pixfmt.h:120
util_altivec.h
SwsContext::u_temp
uint64_t u_temp
Definition: swscale_internal.h:519
SwsContext::chrToYV12
void(* chrToYV12)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal, void *opq)
Unscaled conversion of chroma planes to YV12 for horizontal scaler.
Definition: swscale_internal.h:575
lum
static double lum(void *priv, double x, double y, int plane)
Definition: vf_fftfilt.c:107
alpha
static const int16_t alpha[]
Definition: ilbcdata.h:55
SwsContext::pal_yuv
uint32_t pal_yuv[256]
Definition: swscale_internal.h:374
SwsContext::chrDstHSubSample
int chrDstHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination...
Definition: swscale_internal.h:339
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
SWS_DITHER_AUTO
@ SWS_DITHER_AUTO
Definition: swscale_internal.h:73
isRGBinInt
static av_always_inline int isRGBinInt(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:779
SwsContext::rgb0_scratch
uint8_t * rgb0_scratch
Definition: swscale_internal.h:673
SwsContext::stride_unaligned_warned
atomic_int stride_unaligned_warned
Definition: swscale_internal.h:683
SwsContext::chrDstW
int chrDstW
Width of destination chroma planes.
Definition: swscale_internal.h:328
SwsContext::vgCoeff
uint64_t vgCoeff
Definition: swscale_internal.h:509
int32_t
int32_t
Definition: audioconvert.c:56
SwsContext::lumToYV12
void(* lumToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal, void *opq)
Unscaled conversion of luma plane to YV12 for horizontal scaler.
Definition: swscale_internal.h:569
SwsContext::src_h_chr_pos
int src_h_chr_pos
Definition: swscale_internal.h:465
SwsContext::yuv2packed1
yuv2packed1_fn yuv2packed1
Definition: swscale_internal.h:560
ff_init_desc_fmt_convert
int ff_init_desc_fmt_convert(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint32_t *pal)
initializes lum pixel format conversion descriptor
Definition: hscale.c:128
SwsContext::gamma
uint16_t * gamma
Definition: swscale_internal.h:365
ff_updateMMXDitherTables
void ff_updateMMXDitherTables(SwsContext *c, int dstY)
ff_sws_init_swscale_arm
void ff_sws_init_swscale_arm(SwsContext *c)
Definition: swscale.c:33
isPlanar
static av_always_inline int isPlanar(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:877
SwsContext::cascaded_context
struct SwsContext * cascaded_context[3]
Definition: swscale_internal.h:355
SwsContext::descIndex
int descIndex[2]
Definition: swscale_internal.h:369
SwsContext::uint2float_lut
float uint2float_lut[256]
Definition: swscale_internal.h:377
SwsContext::chrConvertRange
void(* chrConvertRange)(int16_t *dst1, int16_t *dst2, int width)
Color range conversion function for chroma planes if needed.
Definition: swscale_internal.h:662
SwsContext::dst_v_chr_pos
int dst_v_chr_pos
Definition: swscale_internal.h:468
ff_yuv2rgb_init_tables_ppc
void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4], int brightness, int contrast, int saturation)
Definition: yuv2rgb_altivec.c:598
av_bswap16
#define av_bswap16
Definition: bswap.h:28
SWS_DITHER_X_DITHER
@ SWS_DITHER_X_DITHER
Definition: swscale_internal.h:77
int
int
Definition: ffmpeg_filter.c:424
SwsContext
Definition: swscale_internal.h:301
SwsContext::chrSrcHSubSample
int chrSrcHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source imag...
Definition: swscale_internal.h:337
SwsContext::chrMmxextFilterCode
uint8_t * chrMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
Definition: swscale_internal.h:427
AV_PIX_FMT_FLAG_PAL
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:120
AV_PIX_FMT_BGR444LE
@ AV_PIX_FMT_BGR444LE
packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), little-endian, X=unused/undefined
Definition: pixfmt.h:138
SwsContext::dstH
int dstH
Height of destination luma/alpha planes.
Definition: swscale_internal.h:325
SwsContext::esp
uint64_t esp
Definition: swscale_internal.h:517
SwsContext::canMMXEXTBeUsed
int canMMXEXTBeUsed
Definition: swscale_internal.h:429
SwsContext::hyscale_fast
void(* hyscale_fast)(struct SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)
Scale one horizontal line of input data using a bilinear filter to produce one line of output data.
Definition: swscale_internal.h:611
ff_dither_4x4_16
const uint8_t ff_dither_4x4_16[5][8]
Definition: output.c:51
SwsContext::h2f_tables
Half2FloatTables * h2f_tables
Definition: swscale_internal.h:686
ff_yuv2rgb_init_loongarch
SwsFunc ff_yuv2rgb_init_loongarch(SwsContext *c)
Definition: swscale_init_loongarch.c:110
ff_dither_2x2_4
const uint8_t ff_dither_2x2_4[3][8]
Definition: output.c:39
SwsContext::data_unaligned_warned
atomic_int data_unaligned_warned
Definition: swscale_internal.h:684
isALPHA
static av_always_inline int isALPHA(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:859
SwsContext::lastInLumBuf
int lastInLumBuf
Last scaled horizontal luma/alpha line from source in the ring buffer.
Definition: swscale_internal.h:389
SwsContext::parent
struct SwsContext * parent
Definition: swscale_internal.h:307
AV_PIX_FMT_BGR48BE
@ AV_PIX_FMT_BGR48BE
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:145
SwsContext::uv_offx2
ptrdiff_t uv_offx2
offset (in bytes) between u and v planes
Definition: swscale_internal.h:527
SwsContext::needs_hcscale
int needs_hcscale
Set if there are chroma planes to be converted.
Definition: swscale_internal.h:664
SwsContext::param
double param[2]
Input parameters for scaling algorithms that need them.
Definition: swscale_internal.h:344
AV_WN16
#define AV_WN16(p, v)
Definition: intreadwrite.h:366
dither
static const uint8_t dither[8][8]
Definition: vf_fspp.c:61