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
26
35
36 #define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
37
38 #define YUVRGB_TABLE_HEADROOM 512
39 #define YUVRGB_TABLE_LUMA_HEADROOM 512
40
41 #define MAX_FILTER_SIZE SWS_MAX_FILTER_SIZE
42
44
45 #if HAVE_BIGENDIAN
46 #define ALT32_CORR (-1)
47 #else
49 #endif
50
51 #if ARCH_X86_64
52 # define APCK_PTR2 8
53 # define APCK_COEF 16
54 # define APCK_SIZE 24
55 #else
59 #endif
60
61 #define RETCODE_USE_CASCADE -12345
62
64
74
81
83 int srcStride[], int srcSliceY, int srcSliceH,
84 uint8_t *dst[],
int dstStride[]);
85
86 /**
87 * Write one line of horizontally scaled data to planar output
88 * without any additional vertical scaling (or point-scaling).
89 *
90 * @param src scaled source data, 15 bits for 8-10-bit output,
91 * 19 bits for 16-bit output (in int32_t)
92 * @param dest pointer to the output plane. For >8-bit
93 * output, this is in uint16_t
94 * @param dstW width of destination in pixels
95 * @param dither ordered dither array of type int16_t and size 8
96 * @param offset Dither offset
97 */
100
101 /**
102 * Write one line of horizontally scaled data to planar output
103 * with multi-point vertical scaling between input pixels.
104 *
105 * @param filter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
106 * @param src scaled luma (Y) or alpha (A) source data, 15 bits for
107 * 8-10-bit output, 19 bits for 16-bit output (in int32_t)
108 * @param filterSize number of vertical input lines to scale
109 * @param dest pointer to output plane. For >8-bit
110 * output, this is in uint16_t
111 * @param dstW width of destination pixels
112 * @param offset Dither offset
113 */
117
118 /**
119 * Write one line of horizontally scaled chroma to interleaved output
120 * with multi-point vertical scaling between input pixels.
121 *
122 * @param c SWS scaling context
123 * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
124 * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit
125 * output, 19 bits for 16-bit output (in int32_t)
126 * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit
127 * output, 19 bits for 16-bit output (in int32_t)
128 * @param chrFilterSize number of vertical chroma input lines to scale
129 * @param dest pointer to the output plane. For >8-bit
130 * output, this is in uint16_t
131 * @param dstW width of chroma planes
132 */
134 const int16_t *chrFilter,
135 int chrFilterSize,
136 const int16_t **chrUSrc,
137 const int16_t **chrVSrc,
139
140 /**
141 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
142 * output without any additional vertical scaling (or point-scaling). Note
143 * that this function may do chroma scaling, see the "uvalpha" argument.
144 *
145 * @param c SWS scaling context
146 * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
147 * 19 bits for 16-bit output (in int32_t)
148 * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
149 * 19 bits for 16-bit output (in int32_t)
150 * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
151 * 19 bits for 16-bit output (in int32_t)
152 * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
153 * 19 bits for 16-bit output (in int32_t)
154 * @param dest pointer to the output plane. For 16-bit output, this is
155 * uint16_t
156 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
157 * to write into dest[]
158 * @param uvalpha chroma scaling coefficient for the second line of chroma
159 * pixels, either 2048 or 0. If 0, one chroma input is used
160 * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
161 * is set, it generates 1 output pixel). If 2048, two chroma
162 * input pixels should be averaged for 2 output pixels (this
163 * only happens if SWS_FLAG_FULL_CHR_INT is not set)
164 * @param y vertical line number for this output. This does not need
165 * to be used to calculate the offset in the destination,
166 * but can be used to generate comfort noise using dithering
167 * for some output formats.
168 */
170 const int16_t *chrUSrc[2],
171 const int16_t *chrVSrc[2],
172 const int16_t *alpSrc,
uint8_t *dest,
173 int dstW,
int uvalpha,
int y);
174 /**
175 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
176 * output by doing bilinear scaling between two input lines.
177 *
178 * @param c SWS scaling context
179 * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
180 * 19 bits for 16-bit output (in int32_t)
181 * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
182 * 19 bits for 16-bit output (in int32_t)
183 * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
184 * 19 bits for 16-bit output (in int32_t)
185 * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
186 * 19 bits for 16-bit output (in int32_t)
187 * @param dest pointer to the output plane. For 16-bit output, this is
188 * uint16_t
189 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
190 * to write into dest[]
191 * @param yalpha luma/alpha scaling coefficients for the second input line.
192 * The first line's coefficients can be calculated by using
193 * 4096 - yalpha
194 * @param uvalpha chroma scaling coefficient for the second input line. The
195 * first line's coefficients can be calculated by using
196 * 4096 - uvalpha
197 * @param y vertical line number for this output. This does not need
198 * to be used to calculate the offset in the destination,
199 * but can be used to generate comfort noise using dithering
200 * for some output formats.
201 */
203 const int16_t *chrUSrc[2],
204 const int16_t *chrVSrc[2],
205 const int16_t *alpSrc[2],
207 int dstW,
int yalpha,
int uvalpha,
int y);
208 /**
209 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
210 * output by doing multi-point vertical scaling between input pixels.
211 *
212 * @param c SWS scaling context
213 * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
214 * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
215 * 19 bits for 16-bit output (in int32_t)
216 * @param lumFilterSize number of vertical luma/alpha input lines to scale
217 * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
218 * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
219 * 19 bits for 16-bit output (in int32_t)
220 * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
221 * 19 bits for 16-bit output (in int32_t)
222 * @param chrFilterSize number of vertical chroma input lines to scale
223 * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
224 * 19 bits for 16-bit output (in int32_t)
225 * @param dest pointer to the output plane. For 16-bit output, this is
226 * uint16_t
227 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
228 * to write into dest[]
229 * @param y vertical line number for this output. This does not need
230 * to be used to calculate the offset in the destination,
231 * but can be used to generate comfort noise using dithering
232 * or some output formats.
233 */
235 const int16_t **lumSrc, int lumFilterSize,
236 const int16_t *chrFilter,
237 const int16_t **chrUSrc,
238 const int16_t **chrVSrc, int chrFilterSize,
239 const int16_t **alpSrc,
uint8_t *dest,
241
242 /**
243 * Write one line of horizontally scaled Y/U/V/A to YUV/RGB
244 * output by doing multi-point vertical scaling between input pixels.
245 *
246 * @param c SWS scaling context
247 * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
248 * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
249 * 19 bits for 16-bit output (in int32_t)
250 * @param lumFilterSize number of vertical luma/alpha input lines to scale
251 * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
252 * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
253 * 19 bits for 16-bit output (in int32_t)
254 * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
255 * 19 bits for 16-bit output (in int32_t)
256 * @param chrFilterSize number of vertical chroma input lines to scale
257 * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
258 * 19 bits for 16-bit output (in int32_t)
259 * @param dest pointer to the output planes. For 16-bit output, this is
260 * uint16_t
261 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
262 * to write into dest[]
263 * @param y vertical line number for this output. This does not need
264 * to be used to calculate the offset in the destination,
265 * but can be used to generate comfort noise using dithering
266 * or some output formats.
267 */
269 const int16_t **lumSrc, int lumFilterSize,
270 const int16_t *chrFilter,
271 const int16_t **chrUSrc,
272 const int16_t **chrVSrc, int chrFilterSize,
273 const int16_t **alpSrc,
uint8_t **dest,
275
278
279 /* This struct should be aligned on at least a 32-byte boundary. */
281 /**
282 * info on struct for av_log
283 */
285
286 /**
287 * Note that src, dst, srcStride, dstStride will be copied in the
288 * sws_scale() wrapper so they can be freely modified here.
289 */
291 int srcW;
///< Width of source luma/alpha planes.
292 int srcH;
///< Height of source luma/alpha planes.
293 int dstH;
///< Height of destination luma/alpha planes.
294 int chrSrcW;
///< Width of source chroma planes.
295 int chrSrcH;
///< Height of source chroma planes.
296 int chrDstW;
///< Width of destination chroma planes.
297 int chrDstH;
///< Height of destination chroma planes.
302 int dstFormatBpp;
///< Number of bits per pixel of the destination pixel format.
303 int srcFormatBpp;
///< Number of bits per pixel of the source pixel format.
305 int chrSrcHSubSample;
///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
306 int chrSrcVSubSample;
///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
307 int chrDstHSubSample;
///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
308 int chrDstVSubSample;
///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
309 int vChrDrop;
///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
310 int sliceDir;
///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
311 double param[2];
///< Input parameters for scaling algorithms that need them.
312
313 /* The cascaded_* fields allow spliting a scaler task into multiple
314 * sequential steps, this is for example used to limit the maximum
315 * downscaling factor that needs to be supported in one scaler.
316 */
323
329
335
338
339 /**
340 * @name Scaled horizontal lines ring buffer.
341 * The horizontal scaler keeps just enough scaled lines in a ring buffer
342 * so they may be passed to the vertical scaler. The pointers to the
343 * allocated buffers for each line are duplicated in sequence in the ring
344 * buffer to simplify indexing and avoid wrapping around between lines
345 * inside the vertical scaler code. The wrapping is done before the
346 * vertical scaler is called.
347 */
348 //@{
349 int lastInLumBuf;
///< Last scaled horizontal luma/alpha line from source in the ring buffer.
350 int lastInChrBuf;
///< Last scaled horizontal chroma line from source in the ring buffer.
351 int lumBufIndex;
///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
352 int chrBufIndex;
///< Index in ring buffer of the last scaled horizontal chroma line from source.
353 //@}
354
357
358 /**
359 * @name Horizontal and vertical filters.
360 * To better understand the following fields, here is a pseudo-code of
361 * their usage in filtering a horizontal line:
362 * @code
363 * for (i = 0; i < width; i++) {
364 * dst[i] = 0;
365 * for (j = 0; j < filterSize; j++)
366 * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
367 * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
368 * }
369 * @endcode
370 */
371 //@{
372 int16_t *
hLumFilter;
///< Array of horizontal filter coefficients for luma/alpha planes.
373 int16_t *
hChrFilter;
///< Array of horizontal filter coefficients for chroma planes.
374 int16_t *
vLumFilter;
///< Array of vertical filter coefficients for luma/alpha planes.
375 int16_t *
vChrFilter;
///< Array of vertical filter coefficients for chroma planes.
376 int32_t *
hLumFilterPos;
///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
378 int32_t *
vLumFilterPos;
///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
384 //@}
385
390
393
394 int dstY;
///< Last destination vertical line output from last slice.
395 int flags;
///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
396 void *
yuvTable;
// pointer to the yuv->rgb table start so it can be freed()
397 // alignment ensures the offset can be added in a single
398 // instruction on e.g. ARM
413 #define RGB2YUV_SHIFT 15
414
416
417 //Colorspace stuff
421 int srcRange;
///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
422 int dstRange;
///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
437
438 #define RED_DITHER "0*8"
439 #define GREEN_DITHER "1*8"
440 #define BLUE_DITHER "2*8"
441 #define Y_COEFF "3*8"
442 #define VR_COEFF "4*8"
443 #define UB_COEFF "5*8"
444 #define VG_COEFF "6*8"
445 #define UG_COEFF "7*8"
446 #define Y_OFFSET "8*8"
447 #define U_OFFSET "9*8"
448 #define V_OFFSET "10*8"
449 #define LUM_MMX_FILTER_OFFSET "11*8"
450 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)
451 #define DSTW_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2"
452 #define ESP_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+8"
453 #define VROUNDER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+16"
454 #define U_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+24"
455 #define V_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+32"
456 #define Y_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+40"
457 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+48"
458 #define UV_OFF_PX "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+48"
459 #define UV_OFF_BYTE "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+56"
460 #define DITHER16 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+64"
461 #define DITHER32 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+80"
462 #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
463
467
478 int dstW;
///< Width of destination luma/alpha planes.
485 // alignment of these values is not necessary, but merely here
486 // to maintain the same offset across x8632 and x86-64. Once we
487 // use proper offset macros in the asm, they can be removed.
492
494
495 #if HAVE_ALTIVEC
496 vector signed short CY;
497 vector signed short CRV;
498 vector signed short CBU;
499 vector signed short CGU;
500 vector signed short CGV;
501 vector signed short OY;
502 vector
unsigned short CSHIFT;
503 vector signed short *vYCoeffsBank, *vCCoeffsBank;
504 #endif
505
507
508 /* pre defined color-spaces gamma */
509 #define XYZ_GAMMA (2.6f)
510 #define RGB_GAMMA (2.2f)
517
518 /* function pointers for swscale() */
526
527 /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
529 int width, uint32_t *pal);
530 /// Unscaled conversion of alpha plane to YV12 for horizontal scaler.
532 int width, uint32_t *pal);
533 /// Unscaled conversion of chroma planes to YV12 for horizontal scaler.
536 int width, uint32_t *pal);
537
538 /**
539 * Functions to read planar input, such as planar RGB, and convert
540 * internally to Y/UV/A.
541 */
542 /** @{ */
547 /** @} */
548
549 /**
550 * Scale one horizontal line of input data using a bilinear filter
551 * to produce one line of output data. Compared to SwsContext->hScale(),
552 * please take note of the following caveats when using these:
553 * - Scaling is done using only 7 bits instead of 14-bit coefficients.
554 * - You can use no more than 5 input pixels to produce 4 output
555 * pixels. Therefore, this filter should not be used for downscaling
556 * by more than ~20% in width (because that equals more than 5/4th
557 * downscaling and thus more than 5 pixels input per 4 pixels output).
558 * - In general, bilinear filters create artifacts during downscaling
559 * (even when <20%), because one output pixel will span more than one
560 * input pixel, and thus some pixels will need edges of both neighbor
561 * pixels to interpolate the output pixel. Since you can use at most
562 * two input pixels per output pixel in bilinear scaling, this is
563 * impossible and thus downscaling by any size will create artifacts.
564 * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
565 * in SwsContext->flags.
566 */
567 /** @{ */
569 int16_t *dst, int dstWidth,
572 int16_t *dst1, int16_t *dst2, int dstWidth,
575 /** @} */
576
577 /**
578 * Scale one horizontal line of input data using a filter over the input
579 * lines, to produce one (differently sized) line of output data.
580 *
581 * @param dst pointer to destination buffer for horizontally scaled
582 * data. If the number of bits per component of one
583 * destination pixel (SwsContext->dstBpc) is <= 10, data
584 * will be 15 bpc in 16 bits (int16_t) width. Else (i.e.
585 * SwsContext->dstBpc == 16), data will be 19bpc in
586 * 32 bits (int32_t) width.
587 * @param dstW width of destination image
588 * @param src pointer to source data to be scaled. If the number of
589 * bits per component of a source pixel (SwsContext->srcBpc)
590 * is 8, this is 8bpc in 8 bits (uint8_t) width. Else
591 * (i.e. SwsContext->dstBpc > 8), this is native depth
592 * in 16 bits (uint16_t) width. In other words, for 9-bit
593 * YUV input, this is 9bpc, for 10-bit YUV input, this is
594 * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
595 * @param filter filter coefficients to be used per output pixel for
596 * scaling. This contains 14bpp filtering coefficients.
597 * Guaranteed to contain dstW * filterSize entries.
598 * @param filterPos position of the first input pixel to be used for
599 * each output pixel during scaling. Guaranteed to
600 * contain dstW entries.
601 * @param filterSize the number of input coefficients to be used (and
602 * thus the number of input pixels to be used) for
603 * creating a single output pixel. Is aligned to 4
604 * (and input coefficients thus padded with zeroes)
605 * to simplify creating SIMD code.
606 */
607 /** @{ */
610 const int32_t *filterPos,
int filterSize);
613 const int32_t *filterPos,
int filterSize);
614 /** @} */
615
616 /// Color range conversion function for luma plane if needed.
618 /// Color range conversion function for chroma planes if needed.
620
622
624
627 //FIXME check init (where 0)
628
635
638
640
643
645 {
649 }
650
652 {
656 }
657
659 {
663 }
664
666 {
670 }
671
673 {
677 }
678
680 {
684 }
685
687 {
695 }
696
698 {
717 }
718
720 {
739 }
740
742 {
746 }
747
749 {
754 }
755
757 {
761 return 1;
763 }
764
766 {
772 }
773
775 {
779 }
780
782 {
786 }
787
789 {
794 }
795
797 {
801 }
802
805
813
815
817
818 /**
819 * Set c->swscale to an unscaled converter if one exists for the specific
820 * source and destination formats, bit depths, flags, etc.
821 */
826
827 /**
828 * Return function pointer to fastest main scaler path function depending
829 * on architecture and available optimizations.
830 */
832
846
854 int numSplits);
861
862 /**
863 * Allocate and return an SwsContext.
864 * This is like sws_getContext() but does not perform the init step, allowing
865 * the user to set additional AVOptions.
866 *
867 * @see sws_getContext()
868 */
872
874 int srcStride[], int srcSliceY, int srcSliceH,
875 uint8_t *dst[],
int dstStride[]);
876
878 int alpha,
int bits,
const int big_endian)
879 {
880 int i, j;
881 uint8_t *ptr = plane + stride * y;
882 int v = alpha ? 0xFFFF>>(16-
bits) : (1<<(bits-1));
883 for (i = 0; i <
height; i++) {
884 #define FILL(wfunc) \
885 for (j = 0; j < width; j++) {\
886 wfunc(ptr+2*j, v);\
887 }
888 if (big_endian) {
890 } else {
892 }
894 }
895 }
896
897 #define MAX_SLICE_PLANES 4
898
899 /// Slice plane
901 {
908
909 /**
910 * Struct which defines a slice of an image to be scaled or an output for
911 * a scaled slice.
912 * A slice can also be used as intermediate ring buffer for scaling steps.
913 */
915 {
919 int is_ring;
///< flag to identify if this slice is a ring buffer
924
925 /**
926 * Struct which holds all necessary data for processing a slice.
927 * A processing step can be a color conversion or horizontal/vertical scaling.
928 */
930 {
933
934 int alpha;
///< Flag for processing alpha channel
936
937 /// Function for processing input slice sliceH lines starting from line sliceY
940
941 // warp input lines in the form (src + width*i + j) to slice format (line[i][j])
942 // relative=true means first line src[x][0] otherwise first line is src[x][lum/crh Y]
944
945 // Initialize scaler filter descriptor chain
947
948 // Free all filter data
950
951 /*
952 function for applying ring buffer logic into slice s
953 It checks if the slice can hold more @lum lines, if yes
954 do nothing otherwise remove @lum least used lines.
955 It applies the same procedure for @chr lines.
956 */
958
959 /// initializes gamma conversion descriptor
961
962 /// initializes lum pixel format conversion descriptor
964
965 /// initializes lum horizontal scaling descriptor
967
968 /// initializes chr pixel format conversion descriptor
970
971 /// initializes chr horizontal scaling descriptor
973
975
976 /// initializes vertical scaling descriptors
978
979 /// setup vertical scaler functions
983
984 //number of extra lines to process
985 #define MAX_LINES_AHEAD 4
986
987 #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.
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)
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)
static av_always_inline int isAnyRGB(enum AVPixelFormat pix_fmt)
static enum AVPixelFormat pix_fmt
static float alpha(float a)
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
int chrSrcH
Height of source chroma planes.
static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt)
#define YUVRGB_TABLE_HEADROOM
uint8_t * chrMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
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.
packed RGB 8:8:8, 24bpp, RGBRGB...
packed RGB 1:2:1 bitstream, 4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in ...
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)
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.
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
const uint8_t ff_dither_8x8_73[9][8]
uint8_t * table_bU[256+2 *YUVRGB_TABLE_HEADROOM]
int dstFormatBpp
Number of bits per pixel of the destination pixel format.
static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
Convenience header that includes libavutil's core.
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), big-endian, X=unused/undefined
const int32_t ff_yuv2rgb_coeffs[11][4]
int srcRange
0 = MPG YUV range, 1 = JPG YUV range (source image).
void ff_get_unscaled_swscale_arm(SwsContext *c)
const uint8_t * lumDither8
int dstY
Last destination vertical line output from last slice.
packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in ...
void ff_sws_init_input_funcs(SwsContext *c)
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
int srcH
Height of source luma/alpha planes.
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
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.
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
const uint8_t ff_dither_8x8_128[9][8]
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
void(* readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width, int32_t *rgb2yuv)
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
uint8_t ** line
line buffer
8 bits with AV_PIX_FMT_RGB32 palette
int alpha
Flag for processing alpha channel.
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
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)
int v_chr_sub_sample
vertical chroma subsampling factor
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), little-endian, X=unused/undefined ...
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)
int cascaded_tmpStride[4]
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
SwsSlice * dst
Output slice.
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
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)
void ff_sws_init_swscale_arm(SwsContext *c)
int16_t rgb2xyz_matrix[3][4]
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.
uint8_t * table_gU[256+2 *YUVRGB_TABLE_HEADROOM]
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
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.
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...
av_cold void ff_sws_init_range_convert(SwsContext *c)
#define AV_PIX_FMT_BGR32_1
const uint64_t ff_dither4[2]
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.
static av_always_inline int isGray(enum AVPixelFormat pix_fmt)
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
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
int ff_init_filters(SwsContext *c)
int ff_sws_alphablendaway(SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
static const struct endianess table[]
int ff_init_vscale(SwsContext *c, SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst)
initializes vertical scaling descriptors
static const uint8_t dither[8][8]
int ff_rotate_slice(SwsSlice *s, int lum, int chr)
yuv2packed1_fn yuv2packed1
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
simple assert() macros that are a bit more flexible than ISO C assert().
const uint8_t ff_dither_2x2_4[3][8]
static const uint8_t offset[127][2]
int chrDstW
Width of destination chroma planes.
const uint8_t ff_dither_4x4_16[5][8]
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as lit...
uint8_t * cascaded1_tmp[4]
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
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
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)
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)
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
uint8_t * formatConvBuffer
yuv2planar1_fn yuv2plane1
static av_always_inline int isBayer(enum AVPixelFormat pix_fmt)
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
yuv2interleavedX_fn yuv2nv12cX
#define AV_PIX_FMT_FLAG_PSEUDOPAL
The pixel format is "pseudo-paletted".
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
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.
packed RGB 8:8:8, 24bpp, BGRBGR...
struct SwsFilterDescriptor * desc
int ff_init_desc_fmt_convert(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint32_t *pal)
initializes lum pixel format conversion descriptor
uint8_t * table_rV[256+2 *YUVRGB_TABLE_HEADROOM]
const uint8_t ff_dither_8x8_220[9][8]
int srcColorspaceTable[4]
int dstW
Width of destination luma/alpha planes.
#define AV_PIX_FMT_FLAG_BAYER
The pixel format is following a Bayer pattern.
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big...
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
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
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]
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
SwsFunc ff_getSwsFunc(SwsContext *c)
Return function pointer to fastest main scaler path function depending on architecture and available ...
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.
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...
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.
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.
static av_always_inline int isRGBinInt(enum AVPixelFormat pix_fmt)
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)
int chrMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
static av_always_inline int isPlanarYUV(enum AVPixelFormat pix_fmt)
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), little-endian, X=unused/undefined ...
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)
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
Contains misc utility macros and inline functions.
const uint8_t * chrDither8
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
void ff_get_unscaled_swscale_ppc(SwsContext *c)
packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), big-endian, X=unused/undefined
int lumBufIndex
Index in ring buffer of the last scaled horizontal luma/alpha line from source.
void ff_sws_init_swscale_aarch64(SwsContext *c)
void ff_hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
int lastInChrBuf
Last scaled horizontal chroma line from source in the ring buffer.
GLint GLenum GLboolean GLsizei stride
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...
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
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...
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
enum AVPixelFormat srcFormat
Source pixel format.
int32_t chrMmxFilter[4 *MAX_FILTER_SIZE]
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
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.
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.
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)
void ff_updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex, int lastInLumBuf, int lastInChrBuf)
#define AV_PIX_FMT_RGB32_1
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.
static av_always_inline int isBGRinInt(enum AVPixelFormat pix_fmt)
int srcFormatBpp
Number of bits per pixel of the source pixel format.
int ff_init_desc_cfmt_convert(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint32_t *pal)
initializes chr pixel format conversion descriptor
const uint8_t ff_dither_8x8_32[9][8]
static av_always_inline int isPackedRGB(enum AVPixelFormat pix_fmt)
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), big-endian , X=unused/undefined
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]
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.
packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), little-endian, X=unused/undefined ...
static av_always_inline int isPacked(enum AVPixelFormat pix_fmt)
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.
int depth
Number of bits in the component.
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)
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...
AVPixelFormat
Pixel format.
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
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...
static av_always_inline int isNBPS(enum AVPixelFormat pix_fmt)
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
SwsFunc ff_yuv2rgb_init_ppc(SwsContext *c)