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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 "config.h"
25 
26 #if HAVE_ALTIVEC_H
27 #include <altivec.h>
28 #endif
29 
30 #include "version.h"
31 
32 #include "libavutil/avassert.h"
33 #include "libavutil/avutil.h"
34 #include "libavutil/common.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/log.h"
37 #include "libavutil/pixfmt.h"
38 #include "libavutil/pixdesc.h"
39 
40 #define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
41 
42 #define YUVRGB_TABLE_HEADROOM 512
43 #define YUVRGB_TABLE_LUMA_HEADROOM 512
44 
45 #define MAX_FILTER_SIZE SWS_MAX_FILTER_SIZE
46 
47 #define DITHER1XBPP
48 
49 #if HAVE_BIGENDIAN
50 #define ALT32_CORR (-1)
51 #else
52 #define ALT32_CORR 1
53 #endif
54 
55 #if ARCH_X86_64
56 # define APCK_PTR2 8
57 # define APCK_COEF 16
58 # define APCK_SIZE 24
59 #else
60 # define APCK_PTR2 4
61 # define APCK_COEF 8
62 # define APCK_SIZE 16
63 #endif
64 
65 #define RETCODE_USE_CASCADE -12345
66 
67 struct SwsContext;
68 
69 typedef enum SwsDither {
77 } SwsDither;
78 
79 typedef enum SwsAlphaBlend {
85 
86 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[],
87  int srcStride[], int srcSliceY, int srcSliceH,
88  uint8_t *dst[], int dstStride[]);
89 
90 /**
91  * Write one line of horizontally scaled data to planar output
92  * without any additional vertical scaling (or point-scaling).
93  *
94  * @param src scaled source data, 15 bits for 8-10-bit output,
95  * 19 bits for 16-bit output (in int32_t)
96  * @param dest pointer to the output plane. For >8-bit
97  * output, this is in uint16_t
98  * @param dstW width of destination in pixels
99  * @param dither ordered dither array of type int16_t and size 8
100  * @param offset Dither offset
101  */
102 typedef void (*yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW,
103  const uint8_t *dither, int offset);
104 
105 /**
106  * Write one line of horizontally scaled data to planar output
107  * with multi-point vertical scaling between input pixels.
108  *
109  * @param filter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
110  * @param src scaled luma (Y) or alpha (A) source data, 15 bits for
111  * 8-10-bit output, 19 bits for 16-bit output (in int32_t)
112  * @param filterSize number of vertical input lines to scale
113  * @param dest pointer to output plane. For >8-bit
114  * output, this is in uint16_t
115  * @param dstW width of destination pixels
116  * @param offset Dither offset
117  */
118 typedef void (*yuv2planarX_fn)(const int16_t *filter, int filterSize,
119  const int16_t **src, uint8_t *dest, int dstW,
120  const uint8_t *dither, int offset);
121 
122 /**
123  * Write one line of horizontally scaled chroma to interleaved output
124  * with multi-point vertical scaling between input pixels.
125  *
126  * @param c SWS scaling context
127  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
128  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit
129  * output, 19 bits for 16-bit output (in int32_t)
130  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit
131  * output, 19 bits for 16-bit output (in int32_t)
132  * @param chrFilterSize number of vertical chroma input lines to scale
133  * @param dest pointer to the output plane. For >8-bit
134  * output, this is in uint16_t
135  * @param dstW width of chroma planes
136  */
138  const int16_t *chrFilter,
139  int chrFilterSize,
140  const int16_t **chrUSrc,
141  const int16_t **chrVSrc,
142  uint8_t *dest, int dstW);
143 
144 /**
145  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
146  * output without any additional vertical scaling (or point-scaling). Note
147  * that this function may do chroma scaling, see the "uvalpha" argument.
148  *
149  * @param c SWS scaling context
150  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
151  * 19 bits for 16-bit output (in int32_t)
152  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
153  * 19 bits for 16-bit output (in int32_t)
154  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
155  * 19 bits for 16-bit output (in int32_t)
156  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
157  * 19 bits for 16-bit output (in int32_t)
158  * @param dest pointer to the output plane. For 16-bit output, this is
159  * uint16_t
160  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
161  * to write into dest[]
162  * @param uvalpha chroma scaling coefficient for the second line of chroma
163  * pixels, either 2048 or 0. If 0, one chroma input is used
164  * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
165  * is set, it generates 1 output pixel). If 2048, two chroma
166  * input pixels should be averaged for 2 output pixels (this
167  * only happens if SWS_FLAG_FULL_CHR_INT is not set)
168  * @param y vertical line number for this output. This does not need
169  * to be used to calculate the offset in the destination,
170  * but can be used to generate comfort noise using dithering
171  * for some output formats.
172  */
173 typedef void (*yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc,
174  const int16_t *chrUSrc[2],
175  const int16_t *chrVSrc[2],
176  const int16_t *alpSrc, uint8_t *dest,
177  int dstW, int uvalpha, int y);
178 /**
179  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
180  * output by doing bilinear scaling between two input lines.
181  *
182  * @param c SWS scaling context
183  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
184  * 19 bits for 16-bit output (in int32_t)
185  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
186  * 19 bits for 16-bit output (in int32_t)
187  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
188  * 19 bits for 16-bit output (in int32_t)
189  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
190  * 19 bits for 16-bit output (in int32_t)
191  * @param dest pointer to the output plane. For 16-bit output, this is
192  * uint16_t
193  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
194  * to write into dest[]
195  * @param yalpha luma/alpha scaling coefficients for the second input line.
196  * The first line's coefficients can be calculated by using
197  * 4096 - yalpha
198  * @param uvalpha chroma scaling coefficient for the second input line. The
199  * first line's coefficients can be calculated by using
200  * 4096 - uvalpha
201  * @param y vertical line number for this output. This does not need
202  * to be used to calculate the offset in the destination,
203  * but can be used to generate comfort noise using dithering
204  * for some output formats.
205  */
206 typedef void (*yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2],
207  const int16_t *chrUSrc[2],
208  const int16_t *chrVSrc[2],
209  const int16_t *alpSrc[2],
210  uint8_t *dest,
211  int dstW, int yalpha, int uvalpha, int y);
212 /**
213  * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
214  * output by doing multi-point vertical scaling between input pixels.
215  *
216  * @param c SWS scaling context
217  * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
218  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
219  * 19 bits for 16-bit output (in int32_t)
220  * @param lumFilterSize number of vertical luma/alpha input lines to scale
221  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
222  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
223  * 19 bits for 16-bit output (in int32_t)
224  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
225  * 19 bits for 16-bit output (in int32_t)
226  * @param chrFilterSize number of vertical chroma input lines to scale
227  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
228  * 19 bits for 16-bit output (in int32_t)
229  * @param dest pointer to the output plane. For 16-bit output, this is
230  * uint16_t
231  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
232  * to write into dest[]
233  * @param y vertical line number for this output. This does not need
234  * to be used to calculate the offset in the destination,
235  * but can be used to generate comfort noise using dithering
236  * or some output formats.
237  */
238 typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
239  const int16_t **lumSrc, int lumFilterSize,
240  const int16_t *chrFilter,
241  const int16_t **chrUSrc,
242  const int16_t **chrVSrc, int chrFilterSize,
243  const int16_t **alpSrc, uint8_t *dest,
244  int dstW, int y);
245 
246 /**
247  * Write one line of horizontally scaled Y/U/V/A to YUV/RGB
248  * output by doing multi-point vertical scaling between input pixels.
249  *
250  * @param c SWS scaling context
251  * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
252  * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
253  * 19 bits for 16-bit output (in int32_t)
254  * @param lumFilterSize number of vertical luma/alpha input lines to scale
255  * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
256  * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
257  * 19 bits for 16-bit output (in int32_t)
258  * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
259  * 19 bits for 16-bit output (in int32_t)
260  * @param chrFilterSize number of vertical chroma input lines to scale
261  * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
262  * 19 bits for 16-bit output (in int32_t)
263  * @param dest pointer to the output planes. For 16-bit output, this is
264  * uint16_t
265  * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
266  * to write into dest[]
267  * @param y vertical line number for this output. This does not need
268  * to be used to calculate the offset in the destination,
269  * but can be used to generate comfort noise using dithering
270  * or some output formats.
271  */
272 typedef void (*yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter,
273  const int16_t **lumSrc, int lumFilterSize,
274  const int16_t *chrFilter,
275  const int16_t **chrUSrc,
276  const int16_t **chrVSrc, int chrFilterSize,
277  const int16_t **alpSrc, uint8_t **dest,
278  int dstW, int y);
279 
280 struct SwsSlice;
281 struct SwsFilterDescriptor;
282 
283 /* This struct should be aligned on at least a 32-byte boundary. */
284 typedef struct SwsContext {
285  /**
286  * info on struct for av_log
287  */
289 
290  /**
291  * Note that src, dst, srcStride, dstStride will be copied in the
292  * sws_scale() wrapper so they can be freely modified here.
293  */
295  int srcW; ///< Width of source luma/alpha planes.
296  int srcH; ///< Height of source luma/alpha planes.
297  int dstH; ///< Height of destination luma/alpha planes.
298  int chrSrcW; ///< Width of source chroma planes.
299  int chrSrcH; ///< Height of source chroma planes.
300  int chrDstW; ///< Width of destination chroma planes.
301  int chrDstH; ///< Height of destination chroma planes.
304  enum AVPixelFormat dstFormat; ///< Destination pixel format.
305  enum AVPixelFormat srcFormat; ///< Source pixel format.
306  int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
307  int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
309  int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
310  int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
311  int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
312  int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
313  int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
314  int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
315  double param[2]; ///< Input parameters for scaling algorithms that need them.
316 
317  /* The cascaded_* fields allow spliting a scaler task into multiple
318  * sequential steps, this is for example used to limit the maximum
319  * downscaling factor that needs to be supported in one scaler.
320  */
327 
328  double gamma_value;
331  uint16_t *gamma;
332  uint16_t *inv_gamma;
333 
334  int numDesc;
335  int descIndex[2];
336  int numSlice;
337  struct SwsSlice *slice;
339 
340  uint32_t pal_yuv[256];
341  uint32_t pal_rgb[256];
342 
343  /**
344  * @name Scaled horizontal lines ring buffer.
345  * The horizontal scaler keeps just enough scaled lines in a ring buffer
346  * so they may be passed to the vertical scaler. The pointers to the
347  * allocated buffers for each line are duplicated in sequence in the ring
348  * buffer to simplify indexing and avoid wrapping around between lines
349  * inside the vertical scaler code. The wrapping is done before the
350  * vertical scaler is called.
351  */
352  //@{
353  int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
354  int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
355  int lumBufIndex; ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
356  int chrBufIndex; ///< Index in ring buffer of the last scaled horizontal chroma line from source.
357  //@}
358 
361 
362  /**
363  * @name Horizontal and vertical filters.
364  * To better understand the following fields, here is a pseudo-code of
365  * their usage in filtering a horizontal line:
366  * @code
367  * for (i = 0; i < width; i++) {
368  * dst[i] = 0;
369  * for (j = 0; j < filterSize; j++)
370  * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
371  * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
372  * }
373  * @endcode
374  */
375  //@{
376  int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
377  int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
378  int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
379  int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
380  int32_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
381  int32_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
382  int32_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
383  int32_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
384  int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
385  int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
386  int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
387  int vChrFilterSize; ///< Vertical filter size for chroma pixels.
388  //@}
389 
390  int lumMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes.
391  int chrMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
392  uint8_t *lumMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
393  uint8_t *chrMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
394 
397 
398  int dstY; ///< Last destination vertical line output from last slice.
399  int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
400  void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
401  // alignment ensures the offset can be added in a single
402  // instruction on e.g. ARM
407  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
408 #define RY_IDX 0
409 #define GY_IDX 1
410 #define BY_IDX 2
411 #define RU_IDX 3
412 #define GU_IDX 4
413 #define BU_IDX 5
414 #define RV_IDX 6
415 #define GV_IDX 7
416 #define BV_IDX 8
417 #define RGB2YUV_SHIFT 15
418 
419  int *dither_error[4];
420 
421  //Colorspace stuff
422  int contrast, brightness, saturation; // for sws_getColorspaceDetails
425  int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
426  int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
429  int srcXYZ;
430  int dstXYZ;
441 
442 #define RED_DITHER "0*8"
443 #define GREEN_DITHER "1*8"
444 #define BLUE_DITHER "2*8"
445 #define Y_COEFF "3*8"
446 #define VR_COEFF "4*8"
447 #define UB_COEFF "5*8"
448 #define VG_COEFF "6*8"
449 #define UG_COEFF "7*8"
450 #define Y_OFFSET "8*8"
451 #define U_OFFSET "9*8"
452 #define V_OFFSET "10*8"
453 #define LUM_MMX_FILTER_OFFSET "11*8"
454 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)
455 #define DSTW_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2"
456 #define ESP_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+8"
457 #define VROUNDER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+16"
458 #define U_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+24"
459 #define V_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+32"
460 #define Y_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+40"
461 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+48"
462 #define UV_OFF_PX "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+48"
463 #define UV_OFF_BYTE "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+56"
464 #define DITHER16 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+64"
465 #define DITHER32 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+80"
466 #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
467 
468  DECLARE_ALIGNED(8, uint64_t, redDither);
471 
472  DECLARE_ALIGNED(8, uint64_t, yCoeff);
473  DECLARE_ALIGNED(8, uint64_t, vrCoeff);
474  DECLARE_ALIGNED(8, uint64_t, ubCoeff);
475  DECLARE_ALIGNED(8, uint64_t, vgCoeff);
476  DECLARE_ALIGNED(8, uint64_t, ugCoeff);
477  DECLARE_ALIGNED(8, uint64_t, yOffset);
478  DECLARE_ALIGNED(8, uint64_t, uOffset);
479  DECLARE_ALIGNED(8, uint64_t, vOffset);
482  int dstW; ///< Width of destination luma/alpha planes.
483  DECLARE_ALIGNED(8, uint64_t, esp);
484  DECLARE_ALIGNED(8, uint64_t, vRounder);
485  DECLARE_ALIGNED(8, uint64_t, u_temp);
486  DECLARE_ALIGNED(8, uint64_t, v_temp);
487  DECLARE_ALIGNED(8, uint64_t, y_temp);
489  // alignment of these values is not necessary, but merely here
490  // to maintain the same offset across x8632 and x86-64. Once we
491  // use proper offset macros in the asm, they can be removed.
492  DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes
493  DECLARE_ALIGNED(8, ptrdiff_t, uv_offx2); ///< offset (in bytes) between u and v planes
494  DECLARE_ALIGNED(8, uint16_t, dither16)[8];
495  DECLARE_ALIGNED(8, uint32_t, dither32)[8];
496 
498 
499 #if HAVE_ALTIVEC
500  vector signed short CY;
501  vector signed short CRV;
502  vector signed short CBU;
503  vector signed short CGU;
504  vector signed short CGV;
505  vector signed short OY;
506  vector unsigned short CSHIFT;
507  vector signed short *vYCoeffsBank, *vCCoeffsBank;
508 #endif
509 
511 
512 /* pre defined color-spaces gamma */
513 #define XYZ_GAMMA (2.6f)
514 #define RGB_GAMMA (2.2f)
515  int16_t *xyzgamma;
516  int16_t *rgbgamma;
517  int16_t *xyzgammainv;
518  int16_t *rgbgammainv;
519  int16_t xyz2rgb_matrix[3][4];
520  int16_t rgb2xyz_matrix[3][4];
521 
522  /* function pointers for swscale() */
530 
531  /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
532  void (*lumToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
533  int width, uint32_t *pal);
534  /// Unscaled conversion of alpha plane to YV12 for horizontal scaler.
535  void (*alpToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
536  int width, uint32_t *pal);
537  /// Unscaled conversion of chroma planes to YV12 for horizontal scaler.
538  void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
539  const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
540  int width, uint32_t *pal);
541 
542  /**
543  * Functions to read planar input, such as planar RGB, and convert
544  * internally to Y/UV/A.
545  */
546  /** @{ */
548  void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4],
549  int width, int32_t *rgb2yuv);
551  /** @} */
552 
553  /**
554  * Scale one horizontal line of input data using a bilinear filter
555  * to produce one line of output data. Compared to SwsContext->hScale(),
556  * please take note of the following caveats when using these:
557  * - Scaling is done using only 7 bits instead of 14-bit coefficients.
558  * - You can use no more than 5 input pixels to produce 4 output
559  * pixels. Therefore, this filter should not be used for downscaling
560  * by more than ~20% in width (because that equals more than 5/4th
561  * downscaling and thus more than 5 pixels input per 4 pixels output).
562  * - In general, bilinear filters create artifacts during downscaling
563  * (even when <20%), because one output pixel will span more than one
564  * input pixel, and thus some pixels will need edges of both neighbor
565  * pixels to interpolate the output pixel. Since you can use at most
566  * two input pixels per output pixel in bilinear scaling, this is
567  * impossible and thus downscaling by any size will create artifacts.
568  * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
569  * in SwsContext->flags.
570  */
571  /** @{ */
573  int16_t *dst, int dstWidth,
574  const uint8_t *src, int srcW, int xInc);
576  int16_t *dst1, int16_t *dst2, int dstWidth,
577  const uint8_t *src1, const uint8_t *src2,
578  int srcW, int xInc);
579  /** @} */
580 
581  /**
582  * Scale one horizontal line of input data using a filter over the input
583  * lines, to produce one (differently sized) line of output data.
584  *
585  * @param dst pointer to destination buffer for horizontally scaled
586  * data. If the number of bits per component of one
587  * destination pixel (SwsContext->dstBpc) is <= 10, data
588  * will be 15 bpc in 16 bits (int16_t) width. Else (i.e.
589  * SwsContext->dstBpc == 16), data will be 19bpc in
590  * 32 bits (int32_t) width.
591  * @param dstW width of destination image
592  * @param src pointer to source data to be scaled. If the number of
593  * bits per component of a source pixel (SwsContext->srcBpc)
594  * is 8, this is 8bpc in 8 bits (uint8_t) width. Else
595  * (i.e. SwsContext->dstBpc > 8), this is native depth
596  * in 16 bits (uint16_t) width. In other words, for 9-bit
597  * YUV input, this is 9bpc, for 10-bit YUV input, this is
598  * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
599  * @param filter filter coefficients to be used per output pixel for
600  * scaling. This contains 14bpp filtering coefficients.
601  * Guaranteed to contain dstW * filterSize entries.
602  * @param filterPos position of the first input pixel to be used for
603  * each output pixel during scaling. Guaranteed to
604  * contain dstW entries.
605  * @param filterSize the number of input coefficients to be used (and
606  * thus the number of input pixels to be used) for
607  * creating a single output pixel. Is aligned to 4
608  * (and input coefficients thus padded with zeroes)
609  * to simplify creating SIMD code.
610  */
611  /** @{ */
612  void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
613  const uint8_t *src, const int16_t *filter,
614  const int32_t *filterPos, int filterSize);
615  void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
616  const uint8_t *src, const int16_t *filter,
617  const int32_t *filterPos, int filterSize);
618  /** @} */
619 
620  /// Color range conversion function for luma plane if needed.
621  void (*lumConvertRange)(int16_t *dst, int width);
622  /// Color range conversion function for chroma planes if needed.
623  void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width);
624 
625  int needs_hcscale; ///< Set if there are chroma planes to be converted.
626 
628 
630 } SwsContext;
631 //FIXME check init (where 0)
632 
634 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
635  int fullRange, int brightness,
636  int contrast, int saturation);
637 void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4],
638  int brightness, int contrast, int saturation);
639 
641  int lastInLumBuf, int lastInChrBuf);
642 
644 
647 
649 {
650  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
651  av_assert0(desc);
652  return desc->comp[0].depth == 16;
653 }
654 
656 {
657  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
658  av_assert0(desc);
659  return desc->comp[0].depth >= 9 && desc->comp[0].depth <= 14;
660 }
661 
662 #define isNBPS(x) is9_OR_10BPS(x)
663 
665 {
666  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
667  av_assert0(desc);
668  return desc->flags & AV_PIX_FMT_FLAG_BE;
669 }
670 
672 {
673  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
674  av_assert0(desc);
675  return !(desc->flags & AV_PIX_FMT_FLAG_RGB) && desc->nb_components >= 2;
676 }
677 
679 {
680  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
681  av_assert0(desc);
682  return ((desc->flags & AV_PIX_FMT_FLAG_PLANAR) && isYUV(pix_fmt));
683 }
684 
686 {
687  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
688  av_assert0(desc);
689  return (desc->flags & AV_PIX_FMT_FLAG_RGB);
690 }
691 
692 #if 0 // FIXME
693 #define isGray(x) \
694  (!(av_pix_fmt_desc_get(x)->flags & AV_PIX_FMT_FLAG_PAL) && \
695  av_pix_fmt_desc_get(x)->nb_components <= 2)
696 #else
697 #define isGray(x) \
698  ((x) == AV_PIX_FMT_GRAY8 || \
699  (x) == AV_PIX_FMT_YA8 || \
700  (x) == AV_PIX_FMT_GRAY16BE || \
701  (x) == AV_PIX_FMT_GRAY16LE || \
702  (x) == AV_PIX_FMT_YA16BE || \
703  (x) == AV_PIX_FMT_YA16LE)
704 #endif
705 
706 #define isRGBinInt(x) \
707  ( \
708  (x) == AV_PIX_FMT_RGB48BE || \
709  (x) == AV_PIX_FMT_RGB48LE || \
710  (x) == AV_PIX_FMT_RGB32 || \
711  (x) == AV_PIX_FMT_RGB32_1 || \
712  (x) == AV_PIX_FMT_RGB24 || \
713  (x) == AV_PIX_FMT_RGB565BE || \
714  (x) == AV_PIX_FMT_RGB565LE || \
715  (x) == AV_PIX_FMT_RGB555BE || \
716  (x) == AV_PIX_FMT_RGB555LE || \
717  (x) == AV_PIX_FMT_RGB444BE || \
718  (x) == AV_PIX_FMT_RGB444LE || \
719  (x) == AV_PIX_FMT_RGB8 || \
720  (x) == AV_PIX_FMT_RGB4 || \
721  (x) == AV_PIX_FMT_RGB4_BYTE || \
722  (x) == AV_PIX_FMT_RGBA64BE || \
723  (x) == AV_PIX_FMT_RGBA64LE || \
724  (x) == AV_PIX_FMT_MONOBLACK || \
725  (x) == AV_PIX_FMT_MONOWHITE \
726  )
727 #define isBGRinInt(x) \
728  ( \
729  (x) == AV_PIX_FMT_BGR48BE || \
730  (x) == AV_PIX_FMT_BGR48LE || \
731  (x) == AV_PIX_FMT_BGR32 || \
732  (x) == AV_PIX_FMT_BGR32_1 || \
733  (x) == AV_PIX_FMT_BGR24 || \
734  (x) == AV_PIX_FMT_BGR565BE || \
735  (x) == AV_PIX_FMT_BGR565LE || \
736  (x) == AV_PIX_FMT_BGR555BE || \
737  (x) == AV_PIX_FMT_BGR555LE || \
738  (x) == AV_PIX_FMT_BGR444BE || \
739  (x) == AV_PIX_FMT_BGR444LE || \
740  (x) == AV_PIX_FMT_BGR8 || \
741  (x) == AV_PIX_FMT_BGR4 || \
742  (x) == AV_PIX_FMT_BGR4_BYTE || \
743  (x) == AV_PIX_FMT_BGRA64BE || \
744  (x) == AV_PIX_FMT_BGRA64LE || \
745  (x) == AV_PIX_FMT_MONOBLACK || \
746  (x) == AV_PIX_FMT_MONOWHITE \
747  )
748 
749 #define isRGBinBytes(x) ( \
750  (x) == AV_PIX_FMT_RGB48BE \
751  || (x) == AV_PIX_FMT_RGB48LE \
752  || (x) == AV_PIX_FMT_RGBA64BE \
753  || (x) == AV_PIX_FMT_RGBA64LE \
754  || (x) == AV_PIX_FMT_RGBA \
755  || (x) == AV_PIX_FMT_ARGB \
756  || (x) == AV_PIX_FMT_RGB24 \
757  )
758 #define isBGRinBytes(x) ( \
759  (x) == AV_PIX_FMT_BGR48BE \
760  || (x) == AV_PIX_FMT_BGR48LE \
761  || (x) == AV_PIX_FMT_BGRA64BE \
762  || (x) == AV_PIX_FMT_BGRA64LE \
763  || (x) == AV_PIX_FMT_BGRA \
764  || (x) == AV_PIX_FMT_ABGR \
765  || (x) == AV_PIX_FMT_BGR24 \
766  )
767 
768 #define isBayer(x) ( \
769  (x)==AV_PIX_FMT_BAYER_BGGR8 \
770  || (x)==AV_PIX_FMT_BAYER_BGGR16LE \
771  || (x)==AV_PIX_FMT_BAYER_BGGR16BE \
772  || (x)==AV_PIX_FMT_BAYER_RGGB8 \
773  || (x)==AV_PIX_FMT_BAYER_RGGB16LE \
774  || (x)==AV_PIX_FMT_BAYER_RGGB16BE \
775  || (x)==AV_PIX_FMT_BAYER_GBRG8 \
776  || (x)==AV_PIX_FMT_BAYER_GBRG16LE \
777  || (x)==AV_PIX_FMT_BAYER_GBRG16BE \
778  || (x)==AV_PIX_FMT_BAYER_GRBG8 \
779  || (x)==AV_PIX_FMT_BAYER_GRBG16LE \
780  || (x)==AV_PIX_FMT_BAYER_GRBG16BE \
781  )
782 
783 #define isAnyRGB(x) \
784  ( \
785  isBayer(x) || \
786  isRGBinInt(x) || \
787  isBGRinInt(x) || \
788  isRGB(x) \
789  )
790 
792 {
793  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
794  av_assert0(desc);
795  if (pix_fmt == AV_PIX_FMT_PAL8)
796  return 1;
797  return desc->flags & AV_PIX_FMT_FLAG_ALPHA;
798 }
799 
800 #if 1
801 #define isPacked(x) ( \
802  (x)==AV_PIX_FMT_PAL8 \
803  || (x)==AV_PIX_FMT_YUYV422 \
804  || (x)==AV_PIX_FMT_YVYU422 \
805  || (x)==AV_PIX_FMT_UYVY422 \
806  || (x)==AV_PIX_FMT_YA8 \
807  || (x)==AV_PIX_FMT_YA16LE \
808  || (x)==AV_PIX_FMT_YA16BE \
809  || (x)==AV_PIX_FMT_AYUV64LE \
810  || (x)==AV_PIX_FMT_AYUV64BE \
811  || isRGBinInt(x) \
812  || isBGRinInt(x) \
813  )
814 #else
816 {
817  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
818  av_assert0(desc);
819  return ((desc->nb_components >= 2 && !(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) ||
820  pix_fmt == AV_PIX_FMT_PAL8);
821 }
822 
823 #endif
825 {
826  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
827  av_assert0(desc);
828  return (desc->nb_components >= 2 && (desc->flags & AV_PIX_FMT_FLAG_PLANAR));
829 }
830 
832 {
833  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
834  av_assert0(desc);
836 }
837 
839 {
840  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
841  av_assert0(desc);
842  return ((desc->flags & (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB)) ==
844 }
845 
847 {
848  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
849  av_assert0(desc);
850  return (desc->flags & AV_PIX_FMT_FLAG_PAL) || (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL);
851 }
852 
853 extern const uint64_t ff_dither4[2];
854 extern const uint64_t ff_dither8[2];
855 
856 extern const uint8_t ff_dither_2x2_4[3][8];
857 extern const uint8_t ff_dither_2x2_8[3][8];
858 extern const uint8_t ff_dither_4x4_16[5][8];
859 extern const uint8_t ff_dither_8x8_32[9][8];
860 extern const uint8_t ff_dither_8x8_73[9][8];
861 extern const uint8_t ff_dither_8x8_128[9][8];
862 extern const uint8_t ff_dither_8x8_220[9][8];
863 
864 extern const int32_t ff_yuv2rgb_coeffs[11][4];
865 
866 extern const AVClass ff_sws_context_class;
867 
868 /**
869  * Set c->swscale to an unscaled converter if one exists for the specific
870  * source and destination formats, bit depths, flags, etc.
871  */
876 
877 /**
878  * Return function pointer to fastest main scaler path function depending
879  * on architecture and available optimizations.
880  */
882 
896 
897 void ff_hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,
898  const uint8_t *src, int srcW, int xInc);
899 void ff_hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2,
900  int dstWidth, const uint8_t *src1,
901  const uint8_t *src2, int srcW, int xInc);
902 int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode,
903  int16_t *filter, int32_t *filterPos,
904  int numSplits);
905 void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst,
906  int dstWidth, const uint8_t *src,
907  int srcW, int xInc);
908 void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2,
909  int dstWidth, const uint8_t *src1,
910  const uint8_t *src2, int srcW, int xInc);
911 
912 /**
913  * Allocate and return an SwsContext.
914  * This is like sws_getContext() but does not perform the init step, allowing
915  * the user to set additional AVOptions.
916  *
917  * @see sws_getContext()
918  */
920  int dstW, int dstH, enum AVPixelFormat dstFormat,
921  int flags, const double *param);
922 
924  int srcStride[], int srcSliceY, int srcSliceH,
925  uint8_t *dst[], int dstStride[]);
926 
927 static inline void fillPlane16(uint8_t *plane, int stride, int width, int height, int y,
928  int alpha, int bits, const int big_endian)
929 {
930  int i, j;
931  uint8_t *ptr = plane + stride * y;
932  int v = alpha ? 0xFFFF>>(16-bits) : (1<<(bits-1));
933  for (i = 0; i < height; i++) {
934 #define FILL(wfunc) \
935  for (j = 0; j < width; j++) {\
936  wfunc(ptr+2*j, v);\
937  }
938  if (big_endian) {
939  FILL(AV_WB16);
940  } else {
941  FILL(AV_WL16);
942  }
943  ptr += stride;
944  }
945 }
946 
947 #define MAX_SLICE_PLANES 4
948 
949 /// Slice plane
950 typedef struct SwsPlane
951 {
952  int available_lines; ///< max number of lines that can be hold by this plane
953  int sliceY; ///< index of first line
954  int sliceH; ///< number of lines
955  uint8_t **line; ///< line buffer
956  uint8_t **tmp; ///< Tmp line buffer used by mmx code
957 } SwsPlane;
958 
959 /**
960  * Struct which defines a slice of an image to be scaled or an output for
961  * a scaled slice.
962  * A slice can also be used as intermediate ring buffer for scaling steps.
963  */
964 typedef struct SwsSlice
965 {
966  int width; ///< Slice line width
967  int h_chr_sub_sample; ///< horizontal chroma subsampling factor
968  int v_chr_sub_sample; ///< vertical chroma subsampling factor
969  int is_ring; ///< flag to identify if this slice is a ring buffer
970  int should_free_lines; ///< flag to identify if there are dynamic allocated lines
971  enum AVPixelFormat fmt; ///< planes pixel format
972  SwsPlane plane[MAX_SLICE_PLANES]; ///< color planes
973 } SwsSlice;
974 
975 /**
976  * Struct which holds all necessary data for processing a slice.
977  * A processing step can be a color conversion or horizontal/vertical scaling.
978  */
979 typedef struct SwsFilterDescriptor
980 {
981  SwsSlice *src; ///< Source slice
982  SwsSlice *dst; ///< Output slice
983 
984  int alpha; ///< Flag for processing alpha channel
985  void *instance; ///< Filter instance data
986 
987  /// Function for processing input slice sliceH lines starting from line sliceY
988  int (*process)(SwsContext *c, struct SwsFilterDescriptor *desc, int sliceY, int sliceH);
990 
991 // warp input lines in the form (src + width*i + j) to slice format (line[i][j])
992 // relative=true means first line src[x][0] otherwise first line is src[x][lum/crh Y]
993 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);
994 
995 // Initialize scaler filter descriptor chain
997 
998 // Free all filter data
1000 
1001 /*
1002  function for applying ring buffer logic into slice s
1003  It checks if the slice can hold more @lum lines, if yes
1004  do nothing otherwise remove @lum least used lines.
1005  It applies the same procedure for @chr lines.
1006 */
1007 int ff_rotate_slice(SwsSlice *s, int lum, int chr);
1008 
1009 /// initializes gamma conversion descriptor
1011 
1012 /// initializes lum pixel format conversion descriptor
1014 
1015 /// initializes lum horizontal scaling descriptor
1016 int ff_init_desc_hscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc);
1017 
1018 /// initializes chr pixel format conversion descriptor
1020 
1021 /// initializes chr horizontal scaling descriptor
1022 int ff_init_desc_chscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc);
1023 
1025 
1026 /// initializes vertical scaling descriptors
1028 
1029 /// setup vertical scaler functions
1030 void ff_init_vscale_pfn(SwsContext *c, yuv2planar1_fn yuv2plane1, yuv2planarX_fn yuv2planeX,
1031  yuv2interleavedX_fn yuv2nv12cX, yuv2packed1_fn yuv2packed1, yuv2packed2_fn yuv2packed2,
1032  yuv2packedX_fn yuv2packedX, yuv2anyX_fn yuv2anyX, int use_mmx);
1033 
1034 //number of extra lines to process
1035 #define MAX_LINES_AHEAD 4
1036 
1037 #endif /* SWSCALE_SWSCALE_INTERNAL_H */
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
uint64_t vrCoeff
int plane
Definition: avisynth_c.h:422
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:2168
const uint64_t ff_dither8[2]
int chrBufIndex
Index in ring buffer of the last scaled horizontal chroma line from source.
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)
const char * s
Definition: avisynth_c.h:768
static enum AVPixelFormat pix_fmt
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2263
int chrSrcH
Height of source chroma planes.
static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt)
uint64_t y_temp
#define YUVRGB_TABLE_HEADROOM
uint8_t * chrMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
uint64_t v_temp
static void fn() rgb2yuv(uint8_t *_yuv[3], const ptrdiff_t yuv_stride[3], int16_t *rgb[3], ptrdiff_t s, int w, int h, const int16_t rgb2yuv_coeffs[3][3][8], const int16_t yuv_offset[8])
uint8_t * lumMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
uint32_t pal_rgb[256]
int16_t * rgbgamma
const char * desc
Definition: nvenc.c:101
SwsAlphaBlend alphablend
int vChrDrop
Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user...
int h_chr_sub_sample
horizontal chroma subsampling factor
int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange, int brightness, int contrast, int saturation)
Definition: yuv2rgb.c:765
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)
Struct which holds all necessary data for processing a slice.
int16_t * rgbgammainv
const uint8_t ff_dither_8x8_73[9][8]
Definition: output.c:71
uint8_t * table_bU[256+2 *YUVRGB_TABLE_HEADROOM]
int dstFormatBpp
Number of bits per pixel of the destination pixel format.
uint64_t redDither
static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
Convenience header that includes libavutil's core.
int16_t * xyzgammainv
const int32_t ff_yuv2rgb_coeffs[11][4]
Definition: yuv2rgb.c:49
int srcRange
0 = MPG YUV range, 1 = JPG YUV range (source image).
void ff_get_unscaled_swscale_arm(SwsContext *c)
const uint8_t * lumDither8
swscale version macros
int dstY
Last destination vertical line output from last slice.
uint64_t blueDither
uint16_t dither16[8]
void ff_sws_init_input_funcs(SwsContext *c)
uint64_t ubCoeff
int srcH
Height of source luma/alpha planes.
void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int chrDstVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination i...
void(* yuv2interleavedX_fn)(struct SwsContext *c, 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 ...
ptrdiff_t uv_off
offset (in pixels) between u and v planes
uint8_t bits
Definition: crc.c:296
const uint8_t ff_dither_8x8_128[9][8]
Definition: swscale.c:39
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
void(* readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width, int32_t *rgb2yuv)
#define av_cold
Definition: attributes.h:82
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:173
SwsAlphaBlend
uint8_t ** line
line buffer
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:73
int alpha
Flag for processing alpha channel.
int vChrFilterSize
Vertical filter size for chroma pixels.
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...
int ff_init_desc_no_chr(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst)
Definition: hscale.c:281
int v_chr_sub_sample
vertical chroma subsampling factor
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.
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
Definition: cfhd.c:80
int cascaded_tmpStride[4]
SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
Definition: yuv2rgb.c:72
SwsSlice * dst
Output slice.
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:101
#define height
int lastInLumBuf
Last scaled horizontal luma/alpha line from source in the ring buffer.
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
void ff_sws_init_swscale_arm(SwsContext *c)
Definition: swscale.c:32
int16_t rgb2xyz_matrix[3][4]
uint64_t yOffset
int(* process)(SwsContext *c, struct SwsFilterDescriptor *desc, int sliceY, int sliceH)
Function for processing input slice sliceH lines starting from line sliceY.
enum AVPixelFormat dstFormat
Destination pixel format.
uint32_t dither32[8]
uint8_t * table_gU[256+2 *YUVRGB_TABLE_HEADROOM]
uint16_t * inv_gamma
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
int chrSrcHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source imag...
static av_always_inline int isYUV(enum AVPixelFormat pix_fmt)
yuv2packedX_fn yuv2packedX
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:250
uint64_t vRounder
void(* lumConvertRange)(int16_t *dst, int width)
Color range conversion function for luma plane if needed.
int32_t * vChrFilterPos
Array of vertical filter starting positions for each dst[i] for chroma planes.
int dstH
Height of destination luma/alpha planes.
int * dither_error[4]
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...
yuv2anyX_fn yuv2anyX
av_cold void ff_sws_init_range_convert(SwsContext *c)
Definition: swscale.c:534
static double alpha(void *priv, double x, double y)
Definition: vf_geq.c:99
const uint64_t ff_dither4[2]
uint64_t u_temp
int32_t * hChrFilterPos
Array of horizontal filter starting positions for each dst[i] for chroma planes.
int hLumFilterSize
Horizontal filter size for luma/alpha pixels.
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:148
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
int ff_init_filters(SwsContext *c)
Definition: slice.c:249
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
static const struct endianess table[]
int ff_init_vscale(SwsContext *c, SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst)
initializes vertical scaling descriptors
Definition: vscale.c:206
static const uint8_t dither[8][8]
Definition: vf_fspp.c:57
int ff_rotate_slice(SwsSlice *s, int lum, int chr)
Definition: slice.c:119
yuv2packed1_fn yuv2packed1
simple assert() macros that are a bit more flexible than ISO C assert().
const uint8_t ff_dither_2x2_4[3][8]
Definition: output.c:39
Slice plane.
uint64_t ugCoeff
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
int chrDstW
Width of destination chroma planes.
const uint8_t ff_dither_4x4_16[5][8]
Definition: output.c:51
uint8_t * cascaded1_tmp[4]
#define MAX_SLICE_PLANES
SwsPlane plane[MAX_SLICE_PLANES]
color planes
void(* chrConvertRange)(int16_t *dst1, int16_t *dst2, int width)
Color range conversion function for chroma planes if needed.
int32_t alpMmxFilter[4 *MAX_FILTER_SIZE]
int32_t * hLumFilterPos
Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
int hChrFilterSize
Horizontal filter size for chroma pixels.
int sliceH
number of lines
int16_t * xyzgamma
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
int dstRange
0 = MPG YUV range, 1 = JPG YUV range (destination image).
void ff_sws_init_swscale_ppc(SwsContext *c)
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
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 (...
ptrdiff_t uv_offx2
offset (in bytes) between u and v planes
static double lum(void *priv, double x, double y, int plane)
Definition: vf_fftfilt.c:74
#define CSHIFT
Definition: audiogen.c:72
uint8_t * formatConvBuffer
#define width
static av_always_inline int is9_OR_10BPS(enum AVPixelFormat pix_fmt)
yuv2planar1_fn yuv2plane1
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
yuv2interleavedX_fn yuv2nv12cX
uint64_t vgCoeff
uint64_t uOffset
#define AV_PIX_FMT_FLAG_PSEUDOPAL
The pixel format is "pseudo-paletted".
Definition: pixdesc.h:158
int32_t
void(* hcScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
int table_gV[256+2 *YUVRGB_TABLE_HEADROOM]
int available_lines
max number of lines that can be hold by this plane
int ff_init_gamma_convert(SwsFilterDescriptor *desc, SwsSlice *src, uint16_t *table)
initializes gamma conversion descriptor
Definition: gamma.c:58
SwsDither
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.
struct SwsFilterDescriptor * desc
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
uint8_t * table_rV[256+2 *YUVRGB_TABLE_HEADROOM]
#define src
Definition: vp9dsp.c:530
const uint8_t ff_dither_8x8_220[9][8]
Definition: output.c:84
double gamma_value
int srcColorspaceTable[4]
int dstW
Width of destination luma/alpha planes.
uint8_t * cascaded_tmp[4]
int sliceDir
Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
int cascaded1_tmpStride[4]
int needs_hcscale
Set if there are chroma planes to be converted.
int32_t * vLumFilterPos
Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
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
int should_free_lines
flag to identify if there are dynamic allocated lines
static av_always_inline int isBE(enum AVPixelFormat pix_fmt)
int32_t lumMmxFilter[4 *MAX_FILTER_SIZE]
#define src1
Definition: h264pred.c:139
SwsFunc ff_getSwsFunc(SwsContext *c)
Return function pointer to fastest main scaler path function depending on architecture and available ...
Definition: swscale.c:592
int is_ring
flag to identify if this slice is a ring buffer
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:1829
int dstColorspaceTable[4]
void ff_get_unscaled_swscale_aarch64(SwsContext *c)
int width
Slice line width.
const AVClass * av_class
info on struct for av_log
int16_t xyz2rgb_matrix[3][4]
static av_always_inline int isPlanar(enum AVPixelFormat pix_fmt)
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
yuv2planarX_fn yuv2planeX
int warned_unuseable_bilinear
int chrDstH
Height of destination chroma planes.
Struct which defines a slice of an image to be scaled or an output for a scaled slice.
struct SwsSlice * slice
static av_always_inline int isRGB(enum AVPixelFormat pix_fmt)
int(* SwsFunc)(struct SwsContext *context, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
int lumMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes...
Describe the class of an AVClass context structure.
Definition: log.h:67
int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
int vLumFilterSize
Vertical filter size for luma/alpha pixels.
SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
Definition: yuv2rgb.c:670
int chrMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
static av_always_inline int isPlanarYUV(enum AVPixelFormat pix_fmt)
static av_always_inline int isALPHA(enum AVPixelFormat pix_fmt)
int16_t * vChrFilter
Array of vertical filter coefficients for chroma planes.
void * instance
Filter instance data.
void ff_sws_init_swscale_x86(SwsContext *c)
Definition: swscale.c:384
int16_t * hLumFilter
Array of horizontal filter coefficients for luma/alpha planes.
static void fillPlane16(uint8_t *plane, int stride, int width, int height, int y, int alpha, int bits, const int big_endian)
const AVClass ff_sws_context_class
Definition: options.c:87
const uint8_t * chrDither8
static int flags
Definition: cpu.c:47
void ff_get_unscaled_swscale_ppc(SwsContext *c)
int lumBufIndex
Index in ring buffer of the last scaled horizontal luma/alpha line from source.
void ff_sws_init_swscale_aarch64(SwsContext *c)
Definition: swscale.c:32
void ff_hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)
SwsDither dither
int lastInChrBuf
Last scaled horizontal chroma line from source in the ring buffer.
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
yuv2packed2_fn yuv2packed2
void(* readAlpPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv)
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...
double param[2]
Input parameters for scaling algorithms that need them.
common internal and external API header
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...
static double c[64]
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...
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
enum AVPixelFormat srcFormat
Source pixel format.
int32_t chrMmxFilter[4 *MAX_FILTER_SIZE]
enum AVPixelFormat fmt
planes pixel format
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...
struct SwsContext * cascaded_context[3]
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:128
uint64_t greenDither
uint16_t * gamma
SwsFunc swscale
Note that src, dst, srcStride, dstStride will be copied in the sws_scale() wrapper so they can be fre...
uint8_t ** tmp
Tmp line buffer used by mmx code.
#define MAX_FILTER_SIZE
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.
void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4], int brightness, int contrast, int saturation)
pixel format definitions
void ff_updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex, int lastInLumBuf, int lastInChrBuf)
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.
int srcFormatBpp
Number of bits per pixel of the source pixel format.
uint64_t yCoeff
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
const uint8_t ff_dither_8x8_32[9][8]
Definition: output.c:59
static av_always_inline int isPackedRGB(enum AVPixelFormat pix_fmt)
int32_t input_rgb2yuv_table[16+40 *4]
int16_t * vLumFilter
Array of vertical filter coefficients for luma/alpha planes.
const uint8_t ff_dither_2x2_8[3][8]
Definition: output.c:45
#define av_always_inline
Definition: attributes.h:39
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)
static av_always_inline int usePal(enum AVPixelFormat pix_fmt)
SwsSlice * src
Source slice.
int16_t * hChrFilter
Array of horizontal filter coefficients for chroma planes.
#define stride
int sliceY
index of first line
int chrDstHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination...
int chrSrcW
Width of source chroma planes.
#define isPacked(x)
int depth
Number of bits in the component.
Definition: pixdesc.h:58
void ff_get_unscaled_swscale(SwsContext *c)
Set c->swscale to an unscaled converter if one exists for the specific source and destination formats...
int ff_free_filters(SwsContext *c)
Definition: slice.c:377
int srcW
Width of source luma/alpha planes.
int chrSrcVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image...
int flags
Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
#define FILL(wfunc)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
uint32_t pal_yuv[256]
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
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...
uint64_t vOffset
SwsFunc ff_yuv2rgb_init_ppc(SwsContext *c)