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"
38 
39 #define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
40 
41 #define YUVRGB_TABLE_HEADROOM 512
42 #define YUVRGB_TABLE_LUMA_HEADROOM 512
43 
44 #define MAX_FILTER_SIZE SWS_MAX_FILTER_SIZE
45 
46 #define DITHER1XBPP
47 
48 #if HAVE_BIGENDIAN
49 #define ALT32_CORR (-1)
50 #else
51 #define ALT32_CORR 1
52 #endif
53 
54 #if ARCH_X86_64
55 # define APCK_PTR2 8
56 # define APCK_COEF 16
57 # define APCK_SIZE 24
58 #else
59 # define APCK_PTR2 4
60 # define APCK_COEF 8
61 # define APCK_SIZE 16
62 #endif
63 
64 #define RETCODE_USE_CASCADE -12345
65 
66 struct SwsContext;
67 
68 typedef enum SwsDither {
76 } SwsDither;
77 
78 typedef enum SwsAlphaBlend {
84 
85 typedef struct Range {
86  unsigned int start;
87  unsigned int len;
88 } Range;
89 
90 typedef struct RangeList {
92  unsigned int nb_ranges;
94 } RangeList;
95 
96 int ff_range_add(RangeList *r, unsigned int start, unsigned int len);
97 
98 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[],
99  int srcStride[], int srcSliceY, int srcSliceH,
100  uint8_t *dst[], int dstStride[]);
101 
102 /**
103  * Write one line of horizontally scaled data to planar output
104  * without any additional vertical scaling (or point-scaling).
105  *
106  * @param src scaled source data, 15 bits for 8-10-bit output,
107  * 19 bits for 16-bit output (in int32_t)
108  * @param dest pointer to the output plane. For >8-bit
109  * output, this is in uint16_t
110  * @param dstW width of destination in pixels
111  * @param dither ordered dither array of type int16_t and size 8
112  * @param offset Dither offset
113  */
114 typedef void (*yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW,
115  const uint8_t *dither, int offset);
116 
117 /**
118  * Write one line of horizontally scaled data to planar output
119  * with multi-point vertical scaling between input pixels.
120  *
121  * @param filter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
122  * @param src scaled luma (Y) or alpha (A) source data, 15 bits for
123  * 8-10-bit output, 19 bits for 16-bit output (in int32_t)
124  * @param filterSize number of vertical input lines to scale
125  * @param dest pointer to output plane. For >8-bit
126  * output, this is in uint16_t
127  * @param dstW width of destination pixels
128  * @param offset Dither offset
129  */
130 typedef void (*yuv2planarX_fn)(const int16_t *filter, int filterSize,
131  const int16_t **src, uint8_t *dest, int dstW,
132  const uint8_t *dither, int offset);
133 
134 /**
135  * Write one line of horizontally scaled chroma to interleaved output
136  * with multi-point vertical scaling between input pixels.
137  *
138  * @param dstFormat destination pixel format
139  * @param chrDither ordered dither array of type uint8_t and size 8
140  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
141  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit
142  * output, 19 bits for 16-bit output (in int32_t)
143  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit
144  * output, 19 bits for 16-bit output (in int32_t)
145  * @param chrFilterSize number of vertical chroma input lines to scale
146  * @param dest pointer to the output plane. For >8-bit
147  * output, this is in uint16_t
148  * @param dstW width of chroma planes
149  */
151  const uint8_t *chrDither,
152  const int16_t *chrFilter,
153  int chrFilterSize,
154  const int16_t **chrUSrc,
155  const int16_t **chrVSrc,
156  uint8_t *dest, int dstW);
157 
158 /**
159  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
160  * output without any additional vertical scaling (or point-scaling). Note
161  * that this function may do chroma scaling, see the "uvalpha" argument.
162  *
163  * @param c SWS scaling context
164  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
165  * 19 bits for 16-bit output (in int32_t)
166  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
167  * 19 bits for 16-bit output (in int32_t)
168  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
169  * 19 bits for 16-bit output (in int32_t)
170  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
171  * 19 bits for 16-bit output (in int32_t)
172  * @param dest pointer to the output plane. For 16-bit output, this is
173  * uint16_t
174  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
175  * to write into dest[]
176  * @param uvalpha chroma scaling coefficient for the second line of chroma
177  * pixels, either 2048 or 0. If 0, one chroma input is used
178  * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
179  * is set, it generates 1 output pixel). If 2048, two chroma
180  * input pixels should be averaged for 2 output pixels (this
181  * only happens if SWS_FLAG_FULL_CHR_INT is not set)
182  * @param y vertical line number for this output. This does not need
183  * to be used to calculate the offset in the destination,
184  * but can be used to generate comfort noise using dithering
185  * for some output formats.
186  */
187 typedef void (*yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc,
188  const int16_t *chrUSrc[2],
189  const int16_t *chrVSrc[2],
190  const int16_t *alpSrc, uint8_t *dest,
191  int dstW, int uvalpha, int y);
192 /**
193  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
194  * output by doing bilinear scaling between two input lines.
195  *
196  * @param c SWS scaling context
197  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
198  * 19 bits for 16-bit output (in int32_t)
199  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
200  * 19 bits for 16-bit output (in int32_t)
201  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
202  * 19 bits for 16-bit output (in int32_t)
203  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
204  * 19 bits for 16-bit output (in int32_t)
205  * @param dest pointer to the output plane. For 16-bit output, this is
206  * uint16_t
207  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
208  * to write into dest[]
209  * @param yalpha luma/alpha scaling coefficients for the second input line.
210  * The first line's coefficients can be calculated by using
211  * 4096 - yalpha
212  * @param uvalpha chroma scaling coefficient for the second input line. The
213  * first line's coefficients can be calculated by using
214  * 4096 - uvalpha
215  * @param y vertical line number for this output. This does not need
216  * to be used to calculate the offset in the destination,
217  * but can be used to generate comfort noise using dithering
218  * for some output formats.
219  */
220 typedef void (*yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2],
221  const int16_t *chrUSrc[2],
222  const int16_t *chrVSrc[2],
223  const int16_t *alpSrc[2],
224  uint8_t *dest,
225  int dstW, int yalpha, int uvalpha, int y);
226 /**
227  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
228  * output by doing multi-point vertical scaling between input pixels.
229  *
230  * @param c SWS scaling context
231  * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
232  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
233  * 19 bits for 16-bit output (in int32_t)
234  * @param lumFilterSize number of vertical luma/alpha input lines to scale
235  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
236  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
237  * 19 bits for 16-bit output (in int32_t)
238  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
239  * 19 bits for 16-bit output (in int32_t)
240  * @param chrFilterSize number of vertical chroma input lines to scale
241  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
242  * 19 bits for 16-bit output (in int32_t)
243  * @param dest pointer to the output plane. For 16-bit output, this is
244  * uint16_t
245  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
246  * to write into dest[]
247  * @param y vertical line number for this output. This does not need
248  * to be used to calculate the offset in the destination,
249  * but can be used to generate comfort noise using dithering
250  * or some output formats.
251  */
252 typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
253  const int16_t **lumSrc, int lumFilterSize,
254  const int16_t *chrFilter,
255  const int16_t **chrUSrc,
256  const int16_t **chrVSrc, int chrFilterSize,
257  const int16_t **alpSrc, uint8_t *dest,
258  int dstW, int y);
259 
260 /**
261  * Write one line of horizontally scaled Y/U/V/A to YUV/RGB
262  * output by doing multi-point vertical scaling between input pixels.
263  *
264  * @param c SWS scaling context
265  * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
266  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
267  * 19 bits for 16-bit output (in int32_t)
268  * @param lumFilterSize number of vertical luma/alpha input lines to scale
269  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
270  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
271  * 19 bits for 16-bit output (in int32_t)
272  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
273  * 19 bits for 16-bit output (in int32_t)
274  * @param chrFilterSize number of vertical chroma input lines to scale
275  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
276  * 19 bits for 16-bit output (in int32_t)
277  * @param dest pointer to the output planes. For 16-bit output, this is
278  * uint16_t
279  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
280  * to write into dest[]
281  * @param y vertical line number for this output. This does not need
282  * to be used to calculate the offset in the destination,
283  * but can be used to generate comfort noise using dithering
284  * or some output formats.
285  */
286 typedef void (*yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter,
287  const int16_t **lumSrc, int lumFilterSize,
288  const int16_t *chrFilter,
289  const int16_t **chrUSrc,
290  const int16_t **chrVSrc, int chrFilterSize,
291  const int16_t **alpSrc, uint8_t **dest,
292  int dstW, int y);
293 
294 struct SwsSlice;
295 struct SwsFilterDescriptor;
296 
297 /* This struct should be aligned on at least a 32-byte boundary. */
298 typedef struct SwsContext {
299  /**
300  * info on struct for av_log
301  */
303 
305 
308  int *slice_err;
310 
311  // values passed to current sws_receive_slice() call
314 
315  /**
316  * Note that src, dst, srcStride, dstStride will be copied in the
317  * sws_scale() wrapper so they can be freely modified here.
318  */
320  int srcW; ///< Width of source luma/alpha planes.
321  int srcH; ///< Height of source luma/alpha planes.
322  int dstH; ///< Height of destination luma/alpha planes.
323  int chrSrcW; ///< Width of source chroma planes.
324  int chrSrcH; ///< Height of source chroma planes.
325  int chrDstW; ///< Width of destination chroma planes.
326  int chrDstH; ///< Height of destination chroma planes.
329  enum AVPixelFormat dstFormat; ///< Destination pixel format.
330  enum AVPixelFormat srcFormat; ///< Source pixel format.
331  int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
332  int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
334  int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
335  int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
336  int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
337  int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
338  int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
339  int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
340  int nb_threads; ///< Number of threads used for scaling
341  double param[2]; ///< Input parameters for scaling algorithms that need them.
342 
345 
347 
348  /* The cascaded_* fields allow spliting a scaler task into multiple
349  * sequential steps, this is for example used to limit the maximum
350  * downscaling factor that needs to be supported in one scaler.
351  */
354  uint8_t *cascaded_tmp[4];
356  uint8_t *cascaded1_tmp[4];
358 
359  double gamma_value;
362  uint16_t *gamma;
363  uint16_t *inv_gamma;
364 
365  int numDesc;
366  int descIndex[2];
367  int numSlice;
368  struct SwsSlice *slice;
370 
371  uint32_t pal_yuv[256];
372  uint32_t pal_rgb[256];
373 
374  float uint2float_lut[256];
375 
376  /**
377  * @name Scaled horizontal lines ring buffer.
378  * The horizontal scaler keeps just enough scaled lines in a ring buffer
379  * so they may be passed to the vertical scaler. The pointers to the
380  * allocated buffers for each line are duplicated in sequence in the ring
381  * buffer to simplify indexing and avoid wrapping around between lines
382  * inside the vertical scaler code. The wrapping is done before the
383  * vertical scaler is called.
384  */
385  //@{
386  int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
387  int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
388  //@}
389 
392 
393  /**
394  * @name Horizontal and vertical filters.
395  * To better understand the following fields, here is a pseudo-code of
396  * their usage in filtering a horizontal line:
397  * @code
398  * for (i = 0; i < width; i++) {
399  * dst[i] = 0;
400  * for (j = 0; j < filterSize; j++)
401  * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
402  * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
403  * }
404  * @endcode
405  */
406  //@{
407  int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
408  int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
409  int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
410  int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
411  int32_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
412  int32_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
413  int32_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
414  int32_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
415  int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
416  int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
417  int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
418  int vChrFilterSize; ///< Vertical filter size for chroma pixels.
419  //@}
420 
421  int lumMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes.
422  int chrMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
423  uint8_t *lumMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
424  uint8_t *chrMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
425 
428 
429  int dstY; ///< Last destination vertical line output from last slice.
430  int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
431  void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
432  // alignment ensures the offset can be added in a single
433  // instruction on e.g. ARM
435  uint8_t *table_rV[256 + 2*YUVRGB_TABLE_HEADROOM];
436  uint8_t *table_gU[256 + 2*YUVRGB_TABLE_HEADROOM];
437  uint8_t *table_bU[256 + 2*YUVRGB_TABLE_HEADROOM];
438  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
439 #define RY_IDX 0
440 #define GY_IDX 1
441 #define BY_IDX 2
442 #define RU_IDX 3
443 #define GU_IDX 4
444 #define BU_IDX 5
445 #define RV_IDX 6
446 #define GV_IDX 7
447 #define BV_IDX 8
448 #define RGB2YUV_SHIFT 15
449 
450  int *dither_error[4];
451 
452  //Colorspace stuff
453  int contrast, brightness, saturation; // for sws_getColorspaceDetails
456  int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
457  int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
460  int srcXYZ;
461  int dstXYZ;
472 
473 #define RED_DITHER "0*8"
474 #define GREEN_DITHER "1*8"
475 #define BLUE_DITHER "2*8"
476 #define Y_COEFF "3*8"
477 #define VR_COEFF "4*8"
478 #define UB_COEFF "5*8"
479 #define VG_COEFF "6*8"
480 #define UG_COEFF "7*8"
481 #define Y_OFFSET "8*8"
482 #define U_OFFSET "9*8"
483 #define V_OFFSET "10*8"
484 #define LUM_MMX_FILTER_OFFSET "11*8"
485 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)
486 #define DSTW_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2"
487 #define ESP_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+8"
488 #define VROUNDER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+16"
489 #define U_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+24"
490 #define V_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+32"
491 #define Y_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+40"
492 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+48"
493 #define UV_OFF_PX "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+48"
494 #define UV_OFF_BYTE "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+56"
495 #define DITHER16 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+64"
496 #define DITHER32 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+80"
497 #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
498 
499  DECLARE_ALIGNED(8, uint64_t, redDither);
502 
503  DECLARE_ALIGNED(8, uint64_t, yCoeff);
504  DECLARE_ALIGNED(8, uint64_t, vrCoeff);
505  DECLARE_ALIGNED(8, uint64_t, ubCoeff);
506  DECLARE_ALIGNED(8, uint64_t, vgCoeff);
507  DECLARE_ALIGNED(8, uint64_t, ugCoeff);
508  DECLARE_ALIGNED(8, uint64_t, yOffset);
509  DECLARE_ALIGNED(8, uint64_t, uOffset);
510  DECLARE_ALIGNED(8, uint64_t, vOffset);
513  int dstW; ///< Width of destination luma/alpha planes.
514  DECLARE_ALIGNED(8, uint64_t, esp);
515  DECLARE_ALIGNED(8, uint64_t, vRounder);
516  DECLARE_ALIGNED(8, uint64_t, u_temp);
517  DECLARE_ALIGNED(8, uint64_t, v_temp);
518  DECLARE_ALIGNED(8, uint64_t, y_temp);
520  // alignment of these values is not necessary, but merely here
521  // to maintain the same offset across x8632 and x86-64. Once we
522  // use proper offset macros in the asm, they can be removed.
523  DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes
524  DECLARE_ALIGNED(8, ptrdiff_t, uv_offx2); ///< offset (in bytes) between u and v planes
525  DECLARE_ALIGNED(8, uint16_t, dither16)[8];
526  DECLARE_ALIGNED(8, uint32_t, dither32)[8];
527 
528  const uint8_t *chrDither8, *lumDither8;
529 
530 #if HAVE_ALTIVEC
531  vector signed short CY;
532  vector signed short CRV;
533  vector signed short CBU;
534  vector signed short CGU;
535  vector signed short CGV;
536  vector signed short OY;
537  vector unsigned short CSHIFT;
538  vector signed short *vYCoeffsBank, *vCCoeffsBank;
539 #endif
540 
542 
543 /* pre defined color-spaces gamma */
544 #define XYZ_GAMMA (2.6f)
545 #define RGB_GAMMA (2.2f)
546  int16_t *xyzgamma;
547  int16_t *rgbgamma;
548  int16_t *xyzgammainv;
549  int16_t *rgbgammainv;
550  int16_t xyz2rgb_matrix[3][4];
551  int16_t rgb2xyz_matrix[3][4];
552 
553  /* function pointers for swscale() */
561 
562  /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
563  void (*lumToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
564  int width, uint32_t *pal);
565  /// Unscaled conversion of alpha plane to YV12 for horizontal scaler.
566  void (*alpToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
567  int width, uint32_t *pal);
568  /// Unscaled conversion of chroma planes to YV12 for horizontal scaler.
569  void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
570  const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
571  int width, uint32_t *pal);
572 
573  /**
574  * Functions to read planar input, such as planar RGB, and convert
575  * internally to Y/UV/A.
576  */
577  /** @{ */
578  void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv);
579  void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4],
580  int width, int32_t *rgb2yuv);
581  void (*readAlpPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv);
582  /** @} */
583 
584  /**
585  * Scale one horizontal line of input data using a bilinear filter
586  * to produce one line of output data. Compared to SwsContext->hScale(),
587  * please take note of the following caveats when using these:
588  * - Scaling is done using only 7 bits instead of 14-bit coefficients.
589  * - You can use no more than 5 input pixels to produce 4 output
590  * pixels. Therefore, this filter should not be used for downscaling
591  * by more than ~20% in width (because that equals more than 5/4th
592  * downscaling and thus more than 5 pixels input per 4 pixels output).
593  * - In general, bilinear filters create artifacts during downscaling
594  * (even when <20%), because one output pixel will span more than one
595  * input pixel, and thus some pixels will need edges of both neighbor
596  * pixels to interpolate the output pixel. Since you can use at most
597  * two input pixels per output pixel in bilinear scaling, this is
598  * impossible and thus downscaling by any size will create artifacts.
599  * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
600  * in SwsContext->flags.
601  */
602  /** @{ */
603  void (*hyscale_fast)(struct SwsContext *c,
604  int16_t *dst, int dstWidth,
605  const uint8_t *src, int srcW, int xInc);
606  void (*hcscale_fast)(struct SwsContext *c,
607  int16_t *dst1, int16_t *dst2, int dstWidth,
608  const uint8_t *src1, const uint8_t *src2,
609  int srcW, int xInc);
610  /** @} */
611 
612  /**
613  * Scale one horizontal line of input data using a filter over the input
614  * lines, to produce one (differently sized) line of output data.
615  *
616  * @param dst pointer to destination buffer for horizontally scaled
617  * data. If the number of bits per component of one
618  * destination pixel (SwsContext->dstBpc) is <= 10, data
619  * will be 15 bpc in 16 bits (int16_t) width. Else (i.e.
620  * SwsContext->dstBpc == 16), data will be 19bpc in
621  * 32 bits (int32_t) width.
622  * @param dstW width of destination image
623  * @param src pointer to source data to be scaled. If the number of
624  * bits per component of a source pixel (SwsContext->srcBpc)
625  * is 8, this is 8bpc in 8 bits (uint8_t) width. Else
626  * (i.e. SwsContext->dstBpc > 8), this is native depth
627  * in 16 bits (uint16_t) width. In other words, for 9-bit
628  * YUV input, this is 9bpc, for 10-bit YUV input, this is
629  * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
630  * @param filter filter coefficients to be used per output pixel for
631  * scaling. This contains 14bpp filtering coefficients.
632  * Guaranteed to contain dstW * filterSize entries.
633  * @param filterPos position of the first input pixel to be used for
634  * each output pixel during scaling. Guaranteed to
635  * contain dstW entries.
636  * @param filterSize the number of input coefficients to be used (and
637  * thus the number of input pixels to be used) for
638  * creating a single output pixel. Is aligned to 4
639  * (and input coefficients thus padded with zeroes)
640  * to simplify creating SIMD code.
641  */
642  /** @{ */
643  void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
644  const uint8_t *src, const int16_t *filter,
645  const int32_t *filterPos, int filterSize);
646  void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
647  const uint8_t *src, const int16_t *filter,
648  const int32_t *filterPos, int filterSize);
649  /** @} */
650 
651  /// Color range conversion function for luma plane if needed.
652  void (*lumConvertRange)(int16_t *dst, int width);
653  /// Color range conversion function for chroma planes if needed.
654  void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width);
655 
656  int needs_hcscale; ///< Set if there are chroma planes to be converted.
657 
659 
661 
662  // scratch buffer for converting packed rgb0 sources
663  // filled with a copy of the input frame + fully opaque alpha,
664  // then passed as input to further conversion
665  uint8_t *rgb0_scratch;
667 
668  // scratch buffer for converting XYZ sources
669  // filled with the input converted to rgb48
670  // then passed as input to further conversion
671  uint8_t *xyz_scratch;
672  unsigned int xyz_scratch_allocated;
673 
674  unsigned int dst_slice_align;
677 } SwsContext;
678 //FIXME check init (where 0)
679 
681 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
682  int fullRange, int brightness,
683  int contrast, int saturation);
684 void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4],
685  int brightness, int contrast, int saturation);
686 
688 
690 
693 
695 {
697  av_assert0(desc);
698  return desc->comp[0].depth == 16;
699 }
700 
702 {
704  av_assert0(desc);
705  return desc->comp[0].depth == 32;
706 }
707 
709 {
711  av_assert0(desc);
712  return desc->comp[0].depth >= 9 && desc->comp[0].depth <= 14;
713 }
714 
716 {
718  av_assert0(desc);
719  return desc->flags & AV_PIX_FMT_FLAG_BE;
720 }
721 
723 {
725  av_assert0(desc);
726  return !(desc->flags & AV_PIX_FMT_FLAG_RGB) && desc->nb_components >= 2;
727 }
728 
730 {
732  av_assert0(desc);
733  return ((desc->flags & AV_PIX_FMT_FLAG_PLANAR) && isYUV(pix_fmt));
734 }
735 
736 /*
737  * Identity semi-planar YUV formats. Specifically, those are YUV formats
738  * where the second and third components (U & V) are on the same plane.
739  */
741 {
743  av_assert0(desc);
744  return (isPlanarYUV(pix_fmt) && desc->comp[1].plane == desc->comp[2].plane);
745 }
746 
748 {
750  av_assert0(desc);
751  return (desc->flags & AV_PIX_FMT_FLAG_RGB);
752 }
753 
755 {
757  av_assert0(desc);
758  return !(desc->flags & AV_PIX_FMT_FLAG_PAL) &&
759  !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL) &&
760  desc->nb_components <= 2 &&
763 }
764 
766 {
767  return pix_fmt == AV_PIX_FMT_RGB48BE ||
785 }
786 
788 {
789  return pix_fmt == AV_PIX_FMT_BGR48BE ||
807 }
808 
810 {
812  av_assert0(desc);
813  return !!(desc->flags & AV_PIX_FMT_FLAG_BAYER);
814 }
815 
817 {
819  av_assert0(desc);
820  return desc->comp[1].depth == 8;
821 }
822 
824 {
826  av_assert0(desc);
827  return (desc->flags & AV_PIX_FMT_FLAG_RGB) ||
829 }
830 
832 {
834  av_assert0(desc);
835  return desc->flags & AV_PIX_FMT_FLAG_FLOAT;
836 }
837 
839 {
841  av_assert0(desc);
842  if (pix_fmt == AV_PIX_FMT_PAL8)
843  return 1;
844  return desc->flags & AV_PIX_FMT_FLAG_ALPHA;
845 }
846 
848 {
850  av_assert0(desc);
851  return (desc->nb_components >= 2 && !(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) ||
854 }
855 
857 {
859  av_assert0(desc);
860  return (desc->nb_components >= 2 && (desc->flags & AV_PIX_FMT_FLAG_PLANAR));
861 }
862 
864 {
866  av_assert0(desc);
868 }
869 
871 {
873  av_assert0(desc);
874  return ((desc->flags & (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB)) ==
876 }
877 
879 {
880  switch (pix_fmt) {
881  case AV_PIX_FMT_PAL8:
883  case AV_PIX_FMT_BGR8:
884  case AV_PIX_FMT_GRAY8:
886  case AV_PIX_FMT_RGB8:
887  return 1;
888  default:
889  return 0;
890  }
891 }
892 
893 /*
894  * Identity formats where the data is in the high bits, and the low bits are shifted away.
895  */
897 {
898  int i;
900  av_assert0(desc);
902  return 0;
903  for (i = 0; i < desc->nb_components; i++) {
904  if (!desc->comp[i].shift)
905  return 0;
906  if ((desc->comp[i].shift + desc->comp[i].depth) & 0x7)
907  return 0;
908  }
909  return 1;
910 }
911 
912 /*
913  * Identity formats where the chroma planes are swapped (CrCb order).
914  */
916 {
918  av_assert0(desc);
919  if (!isYUV(pix_fmt))
920  return 0;
921  if ((desc->flags & AV_PIX_FMT_FLAG_ALPHA) && desc->nb_components < 4)
922  return 0;
923  if (desc->nb_components < 3)
924  return 0;
926  return desc->comp[1].offset > desc->comp[2].offset;
927  else
928  return desc->comp[1].plane > desc->comp[2].plane;
929 }
930 
931 extern const uint64_t ff_dither4[2];
932 extern const uint64_t ff_dither8[2];
933 
934 extern const uint8_t ff_dither_2x2_4[3][8];
935 extern const uint8_t ff_dither_2x2_8[3][8];
936 extern const uint8_t ff_dither_4x4_16[5][8];
937 extern const uint8_t ff_dither_8x8_32[9][8];
938 extern const uint8_t ff_dither_8x8_73[9][8];
939 extern const uint8_t ff_dither_8x8_128[9][8];
940 extern const uint8_t ff_dither_8x8_220[9][8];
941 
942 extern const int32_t ff_yuv2rgb_coeffs[11][4];
943 
944 extern const AVClass ff_sws_context_class;
945 
946 /**
947  * Set c->convert_unscaled to an unscaled converter if one exists for the
948  * specific source and destination formats, bit depths, flags, etc.
949  */
954 
956 
971 
972 void ff_hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,
973  const uint8_t *src, int srcW, int xInc);
974 void ff_hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2,
975  int dstWidth, const uint8_t *src1,
976  const uint8_t *src2, int srcW, int xInc);
977 int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode,
978  int16_t *filter, int32_t *filterPos,
979  int numSplits);
980 void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst,
981  int dstWidth, const uint8_t *src,
982  int srcW, int xInc);
983 void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2,
984  int dstWidth, const uint8_t *src1,
985  const uint8_t *src2, int srcW, int xInc);
986 
987 /**
988  * Allocate and return an SwsContext.
989  * This is like sws_getContext() but does not perform the init step, allowing
990  * the user to set additional AVOptions.
991  *
992  * @see sws_getContext()
993  */
995  int dstW, int dstH, enum AVPixelFormat dstFormat,
996  int flags, const double *param);
997 
998 int ff_sws_alphablendaway(SwsContext *c, const uint8_t *src[],
999  int srcStride[], int srcSliceY, int srcSliceH,
1000  uint8_t *dst[], int dstStride[]);
1001 
1002 static inline void fillPlane16(uint8_t *plane, int stride, int width, int height, int y,
1003  int alpha, int bits, const int big_endian)
1004 {
1005  int i, j;
1006  uint8_t *ptr = plane + stride * y;
1007  int v = alpha ? 0xFFFF>>(16-bits) : (1<<(bits-1));
1008  for (i = 0; i < height; i++) {
1009 #define FILL(wfunc) \
1010  for (j = 0; j < width; j++) {\
1011  wfunc(ptr+2*j, v);\
1012  }
1013  if (big_endian) {
1014  FILL(AV_WB16);
1015  } else {
1016  FILL(AV_WL16);
1017  }
1018  ptr += stride;
1019  }
1020 #undef FILL
1021 }
1022 
1023 static inline void fillPlane32(uint8_t *plane, int stride, int width, int height, int y,
1024  int alpha, int bits, const int big_endian, int is_float)
1025 {
1026  int i, j;
1027  uint8_t *ptr = plane + stride * y;
1028  uint32_t v;
1029  uint32_t onef32 = 0x3f800000;
1030  if (is_float)
1031  v = alpha ? onef32 : 0;
1032  else
1033  v = alpha ? 0xFFFFFFFF>>(32-bits) : (1<<(bits-1));
1034 
1035  for (i = 0; i < height; i++) {
1036 #define FILL(wfunc) \
1037  for (j = 0; j < width; j++) {\
1038  wfunc(ptr+4*j, v);\
1039  }
1040  if (big_endian) {
1041  FILL(AV_WB32);
1042  } else {
1043  FILL(AV_WL32);
1044  }
1045  ptr += stride;
1046  }
1047 #undef FILL
1048 }
1049 
1050 
1051 #define MAX_SLICE_PLANES 4
1052 
1053 /// Slice plane
1054 typedef struct SwsPlane
1055 {
1056  int available_lines; ///< max number of lines that can be hold by this plane
1057  int sliceY; ///< index of first line
1058  int sliceH; ///< number of lines
1059  uint8_t **line; ///< line buffer
1060  uint8_t **tmp; ///< Tmp line buffer used by mmx code
1061 } SwsPlane;
1062 
1063 /**
1064  * Struct which defines a slice of an image to be scaled or an output for
1065  * a scaled slice.
1066  * A slice can also be used as intermediate ring buffer for scaling steps.
1067  */
1068 typedef struct SwsSlice
1069 {
1070  int width; ///< Slice line width
1071  int h_chr_sub_sample; ///< horizontal chroma subsampling factor
1072  int v_chr_sub_sample; ///< vertical chroma subsampling factor
1073  int is_ring; ///< flag to identify if this slice is a ring buffer
1074  int should_free_lines; ///< flag to identify if there are dynamic allocated lines
1075  enum AVPixelFormat fmt; ///< planes pixel format
1076  SwsPlane plane[MAX_SLICE_PLANES]; ///< color planes
1077 } SwsSlice;
1078 
1079 /**
1080  * Struct which holds all necessary data for processing a slice.
1081  * A processing step can be a color conversion or horizontal/vertical scaling.
1082  */
1083 typedef struct SwsFilterDescriptor
1084 {
1085  SwsSlice *src; ///< Source slice
1086  SwsSlice *dst; ///< Output slice
1087 
1088  int alpha; ///< Flag for processing alpha channel
1089  void *instance; ///< Filter instance data
1090 
1091  /// Function for processing input slice sliceH lines starting from line sliceY
1092  int (*process)(SwsContext *c, struct SwsFilterDescriptor *desc, int sliceY, int sliceH);
1094 
1095 // warp input lines in the form (src + width*i + j) to slice format (line[i][j])
1096 // relative=true means first line src[x][0] otherwise first line is src[x][lum/crh Y]
1097 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);
1098 
1099 // Initialize scaler filter descriptor chain
1101 
1102 // Free all filter data
1104 
1105 /*
1106  function for applying ring buffer logic into slice s
1107  It checks if the slice can hold more @lum lines, if yes
1108  do nothing otherwise remove @lum least used lines.
1109  It applies the same procedure for @chr lines.
1110 */
1111 int ff_rotate_slice(SwsSlice *s, int lum, int chr);
1112 
1113 /// initializes gamma conversion descriptor
1115 
1116 /// initializes lum pixel format conversion descriptor
1118 
1119 /// initializes lum horizontal scaling descriptor
1120 int ff_init_desc_hscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc);
1121 
1122 /// initializes chr pixel format conversion descriptor
1124 
1125 /// initializes chr horizontal scaling descriptor
1126 int ff_init_desc_chscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc);
1127 
1129 
1130 /// initializes vertical scaling descriptors
1132 
1133 /// setup vertical scaler functions
1135  yuv2interleavedX_fn yuv2nv12cX, yuv2packed1_fn yuv2packed1, yuv2packed2_fn yuv2packed2,
1136  yuv2packedX_fn yuv2packedX, yuv2anyX_fn yuv2anyX, int use_mmx);
1137 
1138 void ff_sws_slice_worker(void *priv, int jobnr, int threadnr,
1139  int nb_jobs, int nb_threads);
1140 
1141 //number of extra lines to process
1142 #define MAX_LINES_AHEAD 4
1143 
1144 //shuffle filter and filterPos for hyScale and hcScale filters in avx2
1145 int ff_shuffle_filter_coefficients(SwsContext *c, int* filterPos, int filterSize, int16_t *filter, int dstW);
1146 #endif /* SWSCALE_SWSCALE_INTERNAL_H */
isBayer
static av_always_inline int isBayer(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:809
ff_sws_init_swscale_ppc
void ff_sws_init_swscale_ppc(SwsContext *c)
Definition: swscale_altivec.c:238
SwsContext::is_internal_gamma
int is_internal_gamma
Definition: swscale_internal.h:361
SwsContext::lastInChrBuf
int lastInChrBuf
Last scaled horizontal chroma line from source in the ring buffer.
Definition: swscale_internal.h:387
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:220
SwsContext::flags
int flags
Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc....
Definition: swscale_internal.h:430
SwsContext::vLumFilterSize
int vLumFilterSize
Vertical filter size for luma/alpha pixels.
Definition: swscale_internal.h:417
SwsContext::saturation
int saturation
Definition: swscale_internal.h:453
SwsContext::vOffset
uint64_t vOffset
Definition: swscale_internal.h:510
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:114
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)
Unscaled conversion of chroma planes to YV12 for horizontal scaler.
Definition: swscale_internal.h:569
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:774
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:1092
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:187
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
ff_dither_8x8_128
const uint8_t ff_dither_8x8_128[9][8]
Definition: swscale.c:36
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:139
SwsContext::chrSrcW
int chrSrcW
Width of source chroma planes.
Definition: swscale_internal.h:323
isPlanarRGB
static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:870
SwsPlane::sliceH
int sliceH
number of lines
Definition: swscale_internal.h:1058
ff_sws_slice_worker
void ff_sws_slice_worker(void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
Definition: swscale.c:1214
isRGB
static av_always_inline int isRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:747
isPacked
static av_always_inline int isPacked(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:847
SwsPlane::line
uint8_t ** line
line buffer
Definition: swscale_internal.h:1059
r
const char * r
Definition: vf_curves.c:116
SWS_ALPHA_BLEND_NONE
@ SWS_ALPHA_BLEND_NONE
Definition: swscale_internal.h:79
SwsContext::formatConvBuffer
uint8_t * formatConvBuffer
Definition: swscale_internal.h:390
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:197
SwsContext::dstW
int dstW
Width of destination luma/alpha planes.
Definition: swscale_internal.h:513
ff_dither_8x8_220
const uint8_t ff_dither_8x8_220[9][8]
Definition: output.c:84
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
mem_internal.h
ff_sws_init_swscale_vsx
void ff_sws_init_swscale_vsx(SwsContext *c)
Definition: swscale_vsx.c:2077
SwsContext::dstFormatBpp
int dstFormatBpp
Number of bits per pixel of the destination pixel format.
Definition: swscale_internal.h:331
SwsContext::cascaded1_tmp
uint8_t * cascaded1_tmp[4]
Definition: swscale_internal.h:356
SwsContext::rgbgamma
int16_t * rgbgamma
Definition: swscale_internal.h:547
SWS_DITHER_BAYER
@ SWS_DITHER_BAYER
Definition: swscale_internal.h:71
AV_PIX_FMT_BGR32
#define AV_PIX_FMT_BGR32
Definition: pixfmt.h:383
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:129
isPlanarYUV
static av_always_inline int isPlanarYUV(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:729
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2675
SwsContext::dstY
int dstY
Last destination vertical line output from last slice.
Definition: swscale_internal.h:429
ff_sws_init_swscale_x86
void ff_sws_init_swscale_x86(SwsContext *c)
Definition: swscale.c:450
sws_alloc_set_opts
struct SwsContext * sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, const double *param)
Allocate and return an SwsContext.
Definition: utils.c:2027
SwsContext::cascaded_mainindex
int cascaded_mainindex
Definition: swscale_internal.h:357
SwsContext::alphablend
SwsAlphaBlend alphablend
Definition: swscale_internal.h:660
src1
const pixel * src1
Definition: h264pred_template.c:421
SwsContext::chrDither8
const uint8_t * chrDither8
Definition: swscale_internal.h:528
SwsContext::cascaded1_tmpStride
int cascaded1_tmpStride[4]
Definition: swscale_internal.h:355
SwsContext::yOffset
uint64_t yOffset
Definition: swscale_internal.h:508
SwsContext::vrCoeff
uint64_t vrCoeff
Definition: swscale_internal.h:504
RangeList::ranges_allocated
int ranges_allocated
Definition: swscale_internal.h:93
SwsContext::hChrFilterPos
int32_t * hChrFilterPos
Array of horizontal filter starting positions for each dst[i] for chroma planes.
Definition: swscale_internal.h:412
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:1076
SwsContext::xyz_scratch
uint8_t * xyz_scratch
Definition: swscale_internal.h:671
SWS_DITHER_A_DITHER
@ SWS_DITHER_A_DITHER
Definition: swscale_internal.h:73
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
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:195
SwsContext::ubCoeff
uint64_t ubCoeff
Definition: swscale_internal.h:505
SwsContext::dstColorspaceTable
int dstColorspaceTable[4]
Definition: swscale_internal.h:455
isGray
static av_always_inline int isGray(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:754
ff_rotate_slice
int ff_rotate_slice(SwsSlice *s, int lum, int chr)
Definition: slice.c:119
SwsContext::vChrFilter
int16_t * vChrFilter
Array of vertical filter coefficients for chroma planes.
Definition: swscale_internal.h:410
SwsContext::lumMmxFilter
int32_t lumMmxFilter[4 *MAX_FILTER_SIZE]
Definition: swscale_internal.h:511
SWS_ALPHA_BLEND_NB
@ SWS_ALPHA_BLEND_NB
Definition: swscale_internal.h:82
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:337
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:409
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:147
SwsFilterDescriptor
Struct which holds all necessary data for processing a slice.
Definition: swscale_internal.h:1083
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:206
ff_sws_init_scale
void ff_sws_init_scale(SwsContext *c)
Definition: swscale.c:589
SwsContext::av_class
const AVClass * av_class
info on struct for av_log
Definition: swscale_internal.h:302
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:75
rgb2yuv
static const char rgb2yuv[]
Definition: vf_scale_vulkan.c:68
atomic_int
intptr_t atomic_int
Definition: stdatomic.h:55
AV_PIX_FMT_RGB32_1
#define AV_PIX_FMT_RGB32_1
Definition: pixfmt.h:382
SwsContext::yuv2planeX
yuv2planarX_fn yuv2planeX
Definition: swscale_internal.h:555
SwsContext::redDither
uint64_t redDither
Definition: swscale_internal.h:499
SwsContext::yuv2plane1
yuv2planar1_fn yuv2plane1
Definition: swscale_internal.h:554
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
SwsContext::nb_threads
int nb_threads
Number of threads used for scaling.
Definition: swscale_internal.h:340
SwsContext::srcRange
int srcRange
0 = MPG YUV range, 1 = JPG YUV range (source image).
Definition: swscale_internal.h:456
CY
@ CY
Definition: vf_vpp_qsv.c:160
filter
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
Definition: filter_design.txt:228
SwsContext::lumDither8
const uint8_t * lumDither8
Definition: swscale_internal.h:528
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:391
SwsContext::xyzgamma
int16_t * xyzgamma
Definition: swscale_internal.h:546
SwsContext::pal_rgb
uint32_t pal_rgb[256]
Definition: swscale_internal.h:372
AVSliceThread
struct AVSliceThread AVSliceThread
Definition: slicethread.h:22
SwsContext::yuv2anyX
yuv2anyX_fn yuv2anyX
Definition: swscale_internal.h:560
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:107
SwsContext::cascaded_tmp
uint8_t * cascaded_tmp[4]
Definition: swscale_internal.h:354
SwsSlice::fmt
enum AVPixelFormat fmt
planes pixel format
Definition: swscale_internal.h:1075
SwsFilterDescriptor::src
SwsSlice * src
Source slice.
Definition: swscale_internal.h:1085
SwsContext::dst_slice_align
unsigned int dst_slice_align
Definition: swscale_internal.h:674
Range::start
unsigned int start
Definition: swscale_internal.h:86
SwsContext::src0Alpha
int src0Alpha
Definition: swscale_internal.h:458
SwsContext::yuv2nv12cX
yuv2interleavedX_fn yuv2nv12cX
Definition: swscale_internal.h:556
SwsDither
SwsDither
Definition: swscale_internal.h:68
is16BPS
static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:694
SwsFilterDescriptor::instance
void * instance
Filter instance data.
Definition: swscale_internal.h:1089
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:98
SwsContext::yuvTable
void * yuvTable
Definition: swscale_internal.h:431
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:286
SwsContext::use_mmx_vfilter
int use_mmx_vfilter
Definition: swscale_internal.h:541
SwsContext::readLumPlanar
void(* readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv)
Functions to read planar input, such as planar RGB, and convert internally to Y/UV/A.
Definition: swscale_internal.h:578
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:606
SwsContext::rgbgammainv
int16_t * rgbgammainv
Definition: swscale_internal.h:549
SwsContext::src_v_chr_pos
int src_v_chr_pos
Definition: swscale_internal.h:464
SwsContext::xyz2rgb_matrix
int16_t xyz2rgb_matrix[3][4]
Definition: swscale_internal.h:550
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:87
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_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:708
SwsContext::rgb0_scratch_allocated
unsigned int rgb0_scratch_allocated
Definition: swscale_internal.h:666
SwsContext::hLumFilterSize
int hLumFilterSize
Horizontal filter size for luma/alpha pixels.
Definition: swscale_internal.h:415
SwsContext::srcBpc
int srcBpc
Definition: swscale_internal.h:333
SwsSlice::h_chr_sub_sample
int h_chr_sub_sample
horizontal chroma subsampling factor
Definition: swscale_internal.h:1071
SwsContext::gamma_value
double gamma_value
Definition: swscale_internal.h:359
SwsContext::dstXYZ
int dstXYZ
Definition: swscale_internal.h:461
SwsContext::lumYInc
int lumYInc
Definition: swscale_internal.h:328
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:532
SwsContext::dither_error
int * dither_error[4]
Definition: swscale_internal.h:450
MAX_FILTER_SIZE
#define MAX_FILTER_SIZE
Definition: swscale_internal.h:44
AV_PIX_FMT_BGR8
@ AV_PIX_FMT_BGR8
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:83
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:434
SwsContext::srcFormat
enum AVPixelFormat srcFormat
Source pixel format.
Definition: swscale_internal.h:330
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:523
SwsContext::chrSrcH
int chrSrcH
Height of source chroma planes.
Definition: swscale_internal.h:324
SwsContext::table_bU
uint8_t * table_bU[256+2 *YUVRGB_TABLE_HEADROOM]
Definition: swscale_internal.h:437
YUVRGB_TABLE_HEADROOM
#define YUVRGB_TABLE_HEADROOM
Definition: swscale_internal.h:41
SwsContext::dst_slice_height
int dst_slice_height
Definition: swscale_internal.h:313
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:421
SwsContext::dither
SwsDither dither
Definition: swscale_internal.h:658
SWS_DITHER_ED
@ SWS_DITHER_ED
Definition: swscale_internal.h:72
width
#define width
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
SwsContext::ugCoeff
uint64_t ugCoeff
Definition: swscale_internal.h:507
SwsContext::brightness
int brightness
Definition: swscale_internal.h:453
ff_dither_8x8_32
const uint8_t ff_dither_8x8_32[9][8]
Definition: output.c:59
CSHIFT
#define CSHIFT
Definition: audiogen.c:72
SwsSlice::width
int width
Slice line width.
Definition: swscale_internal.h:1070
SwsContext::lumConvertRange
void(* lumConvertRange)(int16_t *dst, int width)
Color range conversion function for luma plane if needed.
Definition: swscale_internal.h:652
bits
uint8_t bits
Definition: vp3data.h:141
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:37
SwsPlane::tmp
uint8_t ** tmp
Tmp line buffer used by mmx code.
Definition: swscale_internal.h:1060
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:87
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demuxing_decoding.c:41
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:646
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:257
SwsContext::contrast
int contrast
Definition: swscale_internal.h:453
SwsContext::lumXInc
int lumXInc
Definition: swscale_internal.h:327
AV_PIX_FMT_BGR32_1
#define AV_PIX_FMT_BGR32_1
Definition: pixfmt.h:384
SwsContext::vLumFilterPos
int32_t * vLumFilterPos
Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
Definition: swscale_internal.h:413
SwsContext::vRounder
uint64_t vRounder
Definition: swscale_internal.h:515
SwsContext::dstFormat
enum AVPixelFormat dstFormat
Destination pixel format.
Definition: swscale_internal.h:329
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:466
SwsContext::dst_slice_start
int dst_slice_start
Definition: swscale_internal.h:312
isSemiPlanarYUV
static av_always_inline int isSemiPlanarYUV(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:740
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:308
SwsContext::yuv2packed2
yuv2packed2_fn yuv2packed2
Definition: swscale_internal.h:558
SwsContext::readChrPlanar
void(* readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width, int32_t *rgb2yuv)
Definition: swscale_internal.h:579
SWS_DITHER_NONE
@ SWS_DITHER_NONE
Definition: swscale_internal.h:69
AV_PIX_FMT_RGB565LE
@ AV_PIX_FMT_RGB565LE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:106
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:58
SwsContext::xyzgammainv
int16_t * xyzgammainv
Definition: swscale_internal.h:548
SwsPlane::available_lines
int available_lines
max number of lines that can be hold by this plane
Definition: swscale_internal.h:1056
SWS_ALPHA_BLEND_UNIFORM
@ SWS_ALPHA_BLEND_UNIFORM
Definition: swscale_internal.h:80
SwsContext::yuv2rgb_v2g_coeff
int yuv2rgb_v2g_coeff
Definition: swscale_internal.h:469
AV_WB16
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
SwsContext::gamma_flag
int gamma_flag
Definition: swscale_internal.h:360
SwsContext::dstBpc
int dstBpc
Definition: swscale_internal.h:333
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:319
SwsContext::slicethread
AVSliceThread * slicethread
Definition: swscale_internal.h:306
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:103
SwsContext::lumMmxextFilterCode
uint8_t * lumMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
Definition: swscale_internal.h:423
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:76
RangeList
Definition: swscale_internal.h:90
NB_SWS_DITHER
@ NB_SWS_DITHER
Definition: swscale_internal.h:75
AV_PIX_FMT_BGR565LE
@ AV_PIX_FMT_BGR565LE
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
Definition: pixfmt.h:111
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:196
SwsPlane
Slice plane.
Definition: swscale_internal.h:1054
SwsContext::greenDither
uint64_t greenDither
Definition: swscale_internal.h:500
SwsContext::blueDither
uint64_t blueDither
Definition: swscale_internal.h:501
RangeList::nb_ranges
unsigned int nb_ranges
Definition: swscale_internal.h:92
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:144
AV_PIX_FMT_RGB8
@ AV_PIX_FMT_RGB8
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
Definition: pixfmt.h:86
SwsContext::rgb2xyz_matrix
int16_t rgb2xyz_matrix[3][4]
Definition: swscale_internal.h:551
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:84
SwsContext::alpMmxFilter
int32_t alpMmxFilter[4 *MAX_FILTER_SIZE]
Definition: swscale_internal.h:519
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
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:112
SwsContext::yuv2rgb_v2r_coeff
int yuv2rgb_v2r_coeff
Definition: swscale_internal.h:468
ff_init_desc_no_chr
int ff_init_desc_no_chr(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst)
Definition: hscale.c:281
SwsContext::dst_h_chr_pos
int dst_h_chr_pos
Definition: swscale_internal.h:463
Range
Definition: vf_colorbalance.c:38
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
AV_PIX_FMT_BGR4_BYTE
@ AV_PIX_FMT_BGR4_BYTE
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
Definition: pixfmt.h:85
AV_WB32
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
ff_range_add
int ff_range_add(RangeList *r, unsigned int start, unsigned int len)
Definition: utils.c:2519
isDataInHighBits
static av_always_inline int isDataInHighBits(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:896
SwsContext::vChrFilterPos
int32_t * vChrFilterPos
Array of vertical filter starting positions for each dst[i] for chroma planes.
Definition: swscale_internal.h:414
isBE
static av_always_inline int isBE(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:715
SwsContext::sliceDir
int sliceDir
Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
Definition: swscale_internal.h:339
SwsContext::src_ranges
RangeList src_ranges
Definition: swscale_internal.h:346
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
SwsContext::chrSrcVSubSample
int chrSrcVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
Definition: swscale_internal.h:335
SwsContext::yuv2rgb_u2g_coeff
int yuv2rgb_u2g_coeff
Definition: swscale_internal.h:470
SwsContext::hLumFilterPos
int32_t * hLumFilterPos
Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
Definition: swscale_internal.h:411
SwsFilterDescriptor::dst
SwsSlice * dst
Output slice.
Definition: swscale_internal.h:1086
ff_shuffle_filter_coefficients
int ff_shuffle_filter_coefficients(SwsContext *c, int *filterPos, int filterSize, int16_t *filter, int dstW)
Definition: utils.c:264
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:1002
usePal
static av_always_inline int usePal(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:878
SwsContext::v_temp
uint64_t v_temp
Definition: swscale_internal.h:517
isAnyRGB
static av_always_inline int isAnyRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:823
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:130
SwsContext::srcFormatBpp
int srcFormatBpp
Number of bits per pixel of the source pixel format.
Definition: swscale_internal.h:332
SwsContext::srcColorspaceTable
int srcColorspaceTable[4]
Definition: swscale_internal.h:454
SwsContext::desc
struct SwsFilterDescriptor * desc
Definition: swscale_internal.h:369
SwsContext::slice_ctx
struct SwsContext ** slice_ctx
Definition: swscale_internal.h:307
SwsContext::srcH
int srcH
Height of source luma/alpha planes.
Definition: swscale_internal.h:321
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:250
isYUV
static av_always_inline int isYUV(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:722
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:235
SwsAlphaBlend
SwsAlphaBlend
Definition: swscale_internal.h:78
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:643
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:132
ff_yuv2rgb_get_func_ptr
SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
Definition: yuv2rgb.c:678
SwsContext::uOffset
uint64_t uOffset
Definition: swscale_internal.h:509
is32BPS
static av_always_inline int is32BPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:701
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
SwsContext::dither32
uint32_t dither32[8]
Definition: swscale_internal.h:526
height
#define height
AV_PIX_FMT_RGB32
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:381
isBGRinInt
static av_always_inline int isBGRinInt(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:787
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:422
SwsContext::hLumFilter
int16_t * hLumFilter
Array of horizontal filter coefficients for luma/alpha planes.
Definition: swscale_internal.h:407
isSwappedChroma
static av_always_inline int isSwappedChroma(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:915
AV_PIX_FMT_BGR565BE
@ AV_PIX_FMT_BGR565BE
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
Definition: pixfmt.h:110
SwsContext::yuv2packedX
yuv2packedX_fn yuv2packedX
Definition: swscale_internal.h:559
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:418
SwsContext::y_temp
uint64_t y_temp
Definition: swscale_internal.h:518
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:1023
slicethread.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:58
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:198
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:116
SwsContext::frame_src
AVFrame * frame_src
Definition: swscale_internal.h:343
SwsContext::srcW
int srcW
Width of source luma/alpha planes.
Definition: swscale_internal.h:320
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:108
SwsContext::yuv2rgb_u2b_coeff
int yuv2rgb_u2b_coeff
Definition: swscale_internal.h:471
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:102
ff_yuv2rgb_coeffs
const int32_t ff_yuv2rgb_coeffs[11][4]
Definition: yuv2rgb.c:48
log.h
SwsContext::nb_slice_ctx
int nb_slice_ctx
Definition: swscale_internal.h:309
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
SwsContext::dither16
uint16_t dither16[8]
Definition: swscale_internal.h:525
SwsContext::dstRange
int dstRange
0 = MPG YUV range, 1 = JPG YUV range (destination image).
Definition: swscale_internal.h:457
SwsContext::numSlice
int numSlice
Definition: swscale_internal.h:367
src2
const pixel * src2
Definition: h264pred_template.c:422
common.h
SwsSlice::should_free_lines
int should_free_lines
flag to identify if there are dynamic allocated lines
Definition: swscale_internal.h:1074
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:150
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:1073
SwsContext::readAlpPlanar
void(* readAlpPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv)
Definition: swscale_internal.h:581
SwsContext::alpToYV12
void(* alpToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal)
Unscaled conversion of alpha plane to YV12 for horizontal scaler.
Definition: swscale_internal.h:566
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:408
SwsSlice::v_chr_sub_sample
int v_chr_sub_sample
vertical chroma subsampling factor
Definition: swscale_internal.h:1072
AV_PIX_FMT_RGB4_BYTE
@ AV_PIX_FMT_RGB4_BYTE
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
Definition: pixfmt.h:88
SwsSlice
Struct which defines a slice of an image to be scaled or an output for a scaled slice.
Definition: swscale_internal.h:1068
ff_init_filters
int ff_init_filters(SwsContext *c)
Definition: slice.c:248
isFloat
static av_always_inline int isFloat(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:831
RangeList::ranges
Range * ranges
Definition: swscale_internal.h:91
SwsContext::chrYInc
int chrYInc
Definition: swscale_internal.h:328
stride
#define stride
Definition: h264pred_template.c:537
SwsContext::slice
struct SwsSlice * slice
Definition: swscale_internal.h:368
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
SwsFilterDescriptor::alpha
int alpha
Flag for processing alpha channel.
Definition: swscale_internal.h:1088
SwsContext::srcXYZ
int srcXYZ
Definition: swscale_internal.h:460
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:467
SWS_ALPHA_BLEND_CHECKERBOARD
@ SWS_ALPHA_BLEND_CHECKERBOARD
Definition: swscale_internal.h:81
SwsContext::numDesc
int numDesc
Definition: swscale_internal.h:365
SwsContext::table_rV
uint8_t * table_rV[256+2 *YUVRGB_TABLE_HEADROOM]
Definition: swscale_internal.h:435
SwsContext::chrDstH
int chrDstH
Height of destination chroma planes.
Definition: swscale_internal.h:326
SwsContext::xyz_scratch_allocated
unsigned int xyz_scratch_allocated
Definition: swscale_internal.h:672
ff_free_filters
int ff_free_filters(SwsContext *c)
Definition: slice.c:382
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:438
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:130
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)
Definition: output.c:2641
SwsContext::inv_gamma
uint16_t * inv_gamma
Definition: swscale_internal.h:363
MAX_SLICE_PLANES
#define MAX_SLICE_PLANES
Definition: swscale_internal.h:1051
isPackedRGB
static av_always_inline int isPackedRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:863
SwsContext::cascaded_tmpStride
int cascaded_tmpStride[4]
Definition: swscale_internal.h:353
SwsContext::table_gU
uint8_t * table_gU[256+2 *YUVRGB_TABLE_HEADROOM]
Definition: swscale_internal.h:436
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:252
SwsContext::frame_dst
AVFrame * frame_dst
Definition: swscale_internal.h:344
SwsContext::chrXInc
int chrXInc
Definition: swscale_internal.h:327
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:459
SwsContext::warned_unuseable_bilinear
int warned_unuseable_bilinear
Definition: swscale_internal.h:427
AV_PIX_FMT_RGB565BE
@ AV_PIX_FMT_RGB565BE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
Definition: pixfmt.h:105
SwsContext::chrMmxFilter
int32_t chrMmxFilter[4 *MAX_FILTER_SIZE]
Definition: swscale_internal.h:512
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:503
SwsContext::lumToYV12
void(* lumToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal)
Unscaled conversion of luma plane to YV12 for horizontal scaler.
Definition: swscale_internal.h:563
desc
const char * desc
Definition: libsvtav1.c:83
isBayer16BPS
static av_always_inline int isBayer16BPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:816
ff_init_vscale
int ff_init_vscale(SwsContext *c, SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst)
initializes vertical scaling descriptors
Definition: vscale.c:213
SwsPlane::sliceY
int sliceY
index of first line
Definition: swscale_internal.h:1057
SwsContext::hChrFilterSize
int hChrFilterSize
Horizontal filter size for chroma pixels.
Definition: swscale_internal.h:416
SwsContext::vChrDrop
int vChrDrop
Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user...
Definition: swscale_internal.h:338
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:113
util_altivec.h
SwsContext::u_temp
uint64_t u_temp
Definition: swscale_internal.h:516
lum
static double lum(void *priv, double x, double y, int plane)
Definition: vf_fftfilt.c:106
alpha
static const int16_t alpha[]
Definition: ilbcdata.h:55
SwsContext::pal_yuv
uint32_t pal_yuv[256]
Definition: swscale_internal.h:371
SwsContext::chrDstHSubSample
int chrDstHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination...
Definition: swscale_internal.h:336
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
SWS_DITHER_AUTO
@ SWS_DITHER_AUTO
Definition: swscale_internal.h:70
isRGBinInt
static av_always_inline int isRGBinInt(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:765
SwsContext::rgb0_scratch
uint8_t * rgb0_scratch
Definition: swscale_internal.h:665
SwsContext::stride_unaligned_warned
atomic_int stride_unaligned_warned
Definition: swscale_internal.h:675
SwsContext::chrDstW
int chrDstW
Width of destination chroma planes.
Definition: swscale_internal.h:325
SwsContext::vgCoeff
uint64_t vgCoeff
Definition: swscale_internal.h:506
int32_t
int32_t
Definition: audioconvert.c:56
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
SwsContext::src_h_chr_pos
int src_h_chr_pos
Definition: swscale_internal.h:462
SwsContext::yuv2packed1
yuv2packed1_fn yuv2packed1
Definition: swscale_internal.h:557
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:127
SwsContext::gamma
uint16_t * gamma
Definition: swscale_internal.h:362
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:856
SwsContext::cascaded_context
struct SwsContext * cascaded_context[3]
Definition: swscale_internal.h:352
SwsContext::descIndex
int descIndex[2]
Definition: swscale_internal.h:366
SwsContext::uint2float_lut
float uint2float_lut[256]
Definition: swscale_internal.h:374
FILL
#define FILL(wfunc)
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:654
SwsContext::dst_v_chr_pos
int dst_v_chr_pos
Definition: swscale_internal.h:465
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
SWS_DITHER_X_DITHER
@ SWS_DITHER_X_DITHER
Definition: swscale_internal.h:74
int
int
Definition: ffmpeg_filter.c:155
SwsContext
Definition: swscale_internal.h:298
SwsContext::chrSrcHSubSample
int chrSrcHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source imag...
Definition: swscale_internal.h:334
SwsContext::chrMmxextFilterCode
uint8_t * chrMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
Definition: swscale_internal.h:424
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:131
SwsContext::dstH
int dstH
Height of destination luma/alpha planes.
Definition: swscale_internal.h:322
SwsContext::esp
uint64_t esp
Definition: swscale_internal.h:514
SwsContext::canMMXEXTBeUsed
int canMMXEXTBeUsed
Definition: swscale_internal.h:426
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:603
ff_dither_4x4_16
const uint8_t ff_dither_4x4_16[5][8]
Definition: output.c:51
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:676
isALPHA
static av_always_inline int isALPHA(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:838
SwsContext::lastInLumBuf
int lastInLumBuf
Last scaled horizontal luma/alpha line from source in the ring buffer.
Definition: swscale_internal.h:386
SwsContext::parent
struct SwsContext * parent
Definition: swscale_internal.h:304
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:138
SwsContext::uv_offx2
ptrdiff_t uv_offx2
offset (in bytes) between u and v planes
Definition: swscale_internal.h:524
SwsContext::needs_hcscale
int needs_hcscale
Set if there are chroma planes to be converted.
Definition: swscale_internal.h:656
SwsContext::param
double param[2]
Input parameters for scaling algorithms that need them.
Definition: swscale_internal.h:341
dither
static const uint8_t dither[8][8]
Definition: vf_fspp.c:58