2 * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
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.
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.
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
21 #ifndef SWSCALE_SWSCALE_INTERNAL_H
22 #define SWSCALE_SWSCALE_INTERNAL_H
30 #include "libavutil/avassert.h"
31 #include "libavutil/avutil.h"
32 #include "libavutil/common.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/log.h"
35 #include "libavutil/pixfmt.h"
36 #include "libavutil/pixdesc.h"
38 #define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
40 #define YUVRGB_TABLE_HEADROOM 128
42 #define FAST_BGR2YV12 // use 7-bit instead of 15-bit coefficients
44 #define MAX_FILTER_SIZE 256
49 #define ALT32_CORR (-1)
66 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[],
67 int srcStride[], int srcSliceY, int srcSliceH,
68 uint8_t *dst[], int dstStride[]);
71 * Write one line of horizontally scaled data to planar output
72 * without any additional vertical scaling (or point-scaling).
74 * @param src scaled source data, 15bit for 8-10bit output,
75 * 19-bit for 16bit output (in int32_t)
76 * @param dest pointer to the output plane. For >8bit
77 * output, this is in uint16_t
78 * @param dstW width of destination in pixels
79 * @param dither ordered dither array of type int16_t and size 8
80 * @param offset Dither offset
82 typedef void (*yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW,
83 const uint8_t *dither, int offset);
86 * Write one line of horizontally scaled data to planar output
87 * with multi-point vertical scaling between input pixels.
89 * @param filter vertical luma/alpha scaling coefficients, 12bit [0,4096]
90 * @param src scaled luma (Y) or alpha (A) source data, 15bit for 8-10bit output,
91 * 19-bit for 16bit output (in int32_t)
92 * @param filterSize number of vertical input lines to scale
93 * @param dest pointer to output plane. For >8bit
94 * output, this is in uint16_t
95 * @param dstW width of destination pixels
96 * @param offset Dither offset
98 typedef void (*yuv2planarX_fn)(const int16_t *filter, int filterSize,
99 const int16_t **src, uint8_t *dest, int dstW,
100 const uint8_t *dither, int offset);
103 * Write one line of horizontally scaled chroma to interleaved output
104 * with multi-point vertical scaling between input pixels.
106 * @param c SWS scaling context
107 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
108 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
109 * 19-bit for 16bit output (in int32_t)
110 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
111 * 19-bit for 16bit output (in int32_t)
112 * @param chrFilterSize number of vertical chroma input lines to scale
113 * @param dest pointer to the output plane. For >8bit
114 * output, this is in uint16_t
115 * @param dstW width of chroma planes
117 typedef void (*yuv2interleavedX_fn)(struct SwsContext *c,
118 const int16_t *chrFilter,
120 const int16_t **chrUSrc,
121 const int16_t **chrVSrc,
122 uint8_t *dest, int dstW);
125 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
126 * output without any additional vertical scaling (or point-scaling). Note
127 * that this function may do chroma scaling, see the "uvalpha" argument.
129 * @param c SWS scaling context
130 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
131 * 19-bit for 16bit output (in int32_t)
132 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
133 * 19-bit for 16bit output (in int32_t)
134 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
135 * 19-bit for 16bit output (in int32_t)
136 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
137 * 19-bit for 16bit output (in int32_t)
138 * @param dest pointer to the output plane. For 16bit output, this is
140 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
141 * to write into dest[]
142 * @param uvalpha chroma scaling coefficient for the second line of chroma
143 * pixels, either 2048 or 0. If 0, one chroma input is used
144 * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
145 * is set, it generates 1 output pixel). If 2048, two chroma
146 * input pixels should be averaged for 2 output pixels (this
147 * only happens if SWS_FLAG_FULL_CHR_INT is not set)
148 * @param y vertical line number for this output. This does not need
149 * to be used to calculate the offset in the destination,
150 * but can be used to generate comfort noise using dithering
151 * for some output formats.
153 typedef void (*yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc,
154 const int16_t *chrUSrc[2],
155 const int16_t *chrVSrc[2],
156 const int16_t *alpSrc, uint8_t *dest,
157 int dstW, int uvalpha, int y);
159 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
160 * output by doing bilinear scaling between two input lines.
162 * @param c SWS scaling context
163 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
164 * 19-bit for 16bit output (in int32_t)
165 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
166 * 19-bit for 16bit output (in int32_t)
167 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
168 * 19-bit for 16bit output (in int32_t)
169 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
170 * 19-bit for 16bit output (in int32_t)
171 * @param dest pointer to the output plane. For 16bit output, this is
173 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
174 * to write into dest[]
175 * @param yalpha luma/alpha scaling coefficients for the second input line.
176 * The first line's coefficients can be calculated by using
178 * @param uvalpha chroma scaling coefficient for the second input line. The
179 * first line's coefficients can be calculated by using
181 * @param y vertical line number for this output. This does not need
182 * to be used to calculate the offset in the destination,
183 * but can be used to generate comfort noise using dithering
184 * for some output formats.
186 typedef void (*yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2],
187 const int16_t *chrUSrc[2],
188 const int16_t *chrVSrc[2],
189 const int16_t *alpSrc[2],
191 int dstW, int yalpha, int uvalpha, int y);
193 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
194 * output by doing multi-point vertical scaling between input pixels.
196 * @param c SWS scaling context
197 * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
198 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
199 * 19-bit for 16bit output (in int32_t)
200 * @param lumFilterSize number of vertical luma/alpha input lines to scale
201 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
202 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
203 * 19-bit for 16bit output (in int32_t)
204 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
205 * 19-bit for 16bit output (in int32_t)
206 * @param chrFilterSize number of vertical chroma input lines to scale
207 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
208 * 19-bit for 16bit output (in int32_t)
209 * @param dest pointer to the output plane. For 16bit output, this is
211 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
212 * to write into dest[]
213 * @param y vertical line number for this output. This does not need
214 * to be used to calculate the offset in the destination,
215 * but can be used to generate comfort noise using dithering
216 * or some output formats.
218 typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
219 const int16_t **lumSrc, int lumFilterSize,
220 const int16_t *chrFilter,
221 const int16_t **chrUSrc,
222 const int16_t **chrVSrc, int chrFilterSize,
223 const int16_t **alpSrc, uint8_t *dest,
227 * Write one line of horizontally scaled Y/U/V/A to YUV/RGB
228 * output by doing multi-point vertical scaling between input pixels.
230 * @param c SWS scaling context
231 * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
232 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
233 * 19-bit for 16bit output (in int32_t)
234 * @param lumFilterSize number of vertical luma/alpha input lines to scale
235 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
236 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
237 * 19-bit for 16bit output (in int32_t)
238 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
239 * 19-bit for 16bit output (in int32_t)
240 * @param chrFilterSize number of vertical chroma input lines to scale
241 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
242 * 19-bit for 16bit output (in int32_t)
243 * @param dest pointer to the output planes. For 16bit output, this is
245 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
246 * to write into dest[]
247 * @param y vertical line number for this output. This does not need
248 * to be used to calculate the offset in the destination,
249 * but can be used to generate comfort noise using dithering
250 * or some output formats.
252 typedef void (*yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter,
253 const int16_t **lumSrc, int lumFilterSize,
254 const int16_t *chrFilter,
255 const int16_t **chrUSrc,
256 const int16_t **chrVSrc, int chrFilterSize,
257 const int16_t **alpSrc, uint8_t **dest,
260 /* This struct should be aligned on at least a 32-byte boundary. */
261 typedef struct SwsContext {
263 * info on struct for av_log
265 const AVClass *av_class;
268 * Note that src, dst, srcStride, dstStride will be copied in the
269 * sws_scale() wrapper so they can be freely modified here.
272 int srcW; ///< Width of source luma/alpha planes.
273 int srcH; ///< Height of source luma/alpha planes.
274 int dstH; ///< Height of destination luma/alpha planes.
275 int chrSrcW; ///< Width of source chroma planes.
276 int chrSrcH; ///< Height of source chroma planes.
277 int chrDstW; ///< Width of destination chroma planes.
278 int chrDstH; ///< Height of destination chroma planes.
279 int lumXInc, chrXInc;
280 int lumYInc, chrYInc;
281 enum AVPixelFormat dstFormat; ///< Destination pixel format.
282 enum AVPixelFormat srcFormat; ///< Source pixel format.
283 int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
284 int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
286 int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
287 int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
288 int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
289 int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
290 int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
291 int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
292 double param[2]; ///< Input parameters for scaling algorithms that need them.
294 uint32_t pal_yuv[256];
295 uint32_t pal_rgb[256];
298 * @name Scaled horizontal lines ring buffer.
299 * The horizontal scaler keeps just enough scaled lines in a ring buffer
300 * so they may be passed to the vertical scaler. The pointers to the
301 * allocated buffers for each line are duplicated in sequence in the ring
302 * buffer to simplify indexing and avoid wrapping around between lines
303 * inside the vertical scaler code. The wrapping is done before the
304 * vertical scaler is called.
307 int16_t **lumPixBuf; ///< Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.
308 int16_t **chrUPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
309 int16_t **chrVPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
310 int16_t **alpPixBuf; ///< Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.
311 int vLumBufSize; ///< Number of vertical luma/alpha lines allocated in the ring buffer.
312 int vChrBufSize; ///< Number of vertical chroma lines allocated in the ring buffer.
313 int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
314 int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
315 int lumBufIndex; ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
316 int chrBufIndex; ///< Index in ring buffer of the last scaled horizontal chroma line from source.
319 uint8_t *formatConvBuffer;
322 * @name Horizontal and vertical filters.
323 * To better understand the following fields, here is a pseudo-code of
324 * their usage in filtering a horizontal line:
326 * for (i = 0; i < width; i++) {
328 * for (j = 0; j < filterSize; j++)
329 * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
330 * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
335 int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
336 int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
337 int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
338 int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
339 int32_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
340 int32_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
341 int32_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
342 int32_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
343 int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
344 int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
345 int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
346 int vChrFilterSize; ///< Vertical filter size for chroma pixels.
349 int lumMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes.
350 int chrMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
351 uint8_t *lumMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
352 uint8_t *chrMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
356 int dstY; ///< Last destination vertical line output from last slice.
357 int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
358 void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
359 uint8_t *table_rV[256 + 2*YUVRGB_TABLE_HEADROOM];
360 uint8_t *table_gU[256 + 2*YUVRGB_TABLE_HEADROOM];
361 int table_gV[256 + 2*YUVRGB_TABLE_HEADROOM];
362 uint8_t *table_bU[256 + 2*YUVRGB_TABLE_HEADROOM];
364 int *dither_error[4];
367 int contrast, brightness, saturation; // for sws_getColorspaceDetails
368 int srcColorspaceTable[4];
369 int dstColorspaceTable[4];
370 int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
371 int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
374 int yuv2rgb_y_offset;
376 int yuv2rgb_v2r_coeff;
377 int yuv2rgb_v2g_coeff;
378 int yuv2rgb_u2g_coeff;
379 int yuv2rgb_u2b_coeff;
381 #define RED_DITHER "0*8"
382 #define GREEN_DITHER "1*8"
383 #define BLUE_DITHER "2*8"
384 #define Y_COEFF "3*8"
385 #define VR_COEFF "4*8"
386 #define UB_COEFF "5*8"
387 #define VG_COEFF "6*8"
388 #define UG_COEFF "7*8"
389 #define Y_OFFSET "8*8"
390 #define U_OFFSET "9*8"
391 #define V_OFFSET "10*8"
392 #define LUM_MMX_FILTER_OFFSET "11*8"
393 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
394 #define DSTW_OFFSET "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
395 #define ESP_OFFSET "11*8+4*4*256*2+8"
396 #define VROUNDER_OFFSET "11*8+4*4*256*2+16"
397 #define U_TEMP "11*8+4*4*256*2+24"
398 #define V_TEMP "11*8+4*4*256*2+32"
399 #define Y_TEMP "11*8+4*4*256*2+40"
400 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
401 #define UV_OFF_PX "11*8+4*4*256*3+48"
402 #define UV_OFF_BYTE "11*8+4*4*256*3+56"
403 #define DITHER16 "11*8+4*4*256*3+64"
404 #define DITHER32 "11*8+4*4*256*3+80"
406 DECLARE_ALIGNED(8, uint64_t, redDither);
407 DECLARE_ALIGNED(8, uint64_t, greenDither);
408 DECLARE_ALIGNED(8, uint64_t, blueDither);
410 DECLARE_ALIGNED(8, uint64_t, yCoeff);
411 DECLARE_ALIGNED(8, uint64_t, vrCoeff);
412 DECLARE_ALIGNED(8, uint64_t, ubCoeff);
413 DECLARE_ALIGNED(8, uint64_t, vgCoeff);
414 DECLARE_ALIGNED(8, uint64_t, ugCoeff);
415 DECLARE_ALIGNED(8, uint64_t, yOffset);
416 DECLARE_ALIGNED(8, uint64_t, uOffset);
417 DECLARE_ALIGNED(8, uint64_t, vOffset);
418 int32_t lumMmxFilter[4 * MAX_FILTER_SIZE];
419 int32_t chrMmxFilter[4 * MAX_FILTER_SIZE];
420 int dstW; ///< Width of destination luma/alpha planes.
421 DECLARE_ALIGNED(8, uint64_t, esp);
422 DECLARE_ALIGNED(8, uint64_t, vRounder);
423 DECLARE_ALIGNED(8, uint64_t, u_temp);
424 DECLARE_ALIGNED(8, uint64_t, v_temp);
425 DECLARE_ALIGNED(8, uint64_t, y_temp);
426 int32_t alpMmxFilter[4 * MAX_FILTER_SIZE];
427 // alignment of these values is not necessary, but merely here
428 // to maintain the same offset across x8632 and x86-64. Once we
429 // use proper offset macros in the asm, they can be removed.
430 DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes
431 DECLARE_ALIGNED(8, ptrdiff_t, uv_offx2); ///< offset (in bytes) between u and v planes
432 DECLARE_ALIGNED(8, uint16_t, dither16)[8];
433 DECLARE_ALIGNED(8, uint32_t, dither32)[8];
435 const uint8_t *chrDither8, *lumDither8;
438 vector signed short CY;
439 vector signed short CRV;
440 vector signed short CBU;
441 vector signed short CGU;
442 vector signed short CGV;
443 vector signed short OY;
444 vector unsigned short CSHIFT;
445 vector signed short *vYCoeffsBank, *vCCoeffsBank;
449 DECLARE_ALIGNED(4, uint32_t, oy);
450 DECLARE_ALIGNED(4, uint32_t, oc);
451 DECLARE_ALIGNED(4, uint32_t, zero);
452 DECLARE_ALIGNED(4, uint32_t, cy);
453 DECLARE_ALIGNED(4, uint32_t, crv);
454 DECLARE_ALIGNED(4, uint32_t, rmask);
455 DECLARE_ALIGNED(4, uint32_t, cbu);
456 DECLARE_ALIGNED(4, uint32_t, bmask);
457 DECLARE_ALIGNED(4, uint32_t, cgu);
458 DECLARE_ALIGNED(4, uint32_t, cgv);
459 DECLARE_ALIGNED(4, uint32_t, gmask);
463 DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10];
467 /* function pointers for swScale() */
468 yuv2planar1_fn yuv2plane1;
469 yuv2planarX_fn yuv2planeX;
470 yuv2interleavedX_fn yuv2nv12cX;
471 yuv2packed1_fn yuv2packed1;
472 yuv2packed2_fn yuv2packed2;
473 yuv2packedX_fn yuv2packedX;
474 yuv2anyX_fn yuv2anyX;
476 /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
477 void (*lumToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
478 int width, uint32_t *pal);
479 /// Unscaled conversion of alpha plane to YV12 for horizontal scaler.
480 void (*alpToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
481 int width, uint32_t *pal);
482 /// Unscaled conversion of chroma planes to YV12 for horizontal scaler.
483 void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
484 const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
485 int width, uint32_t *pal);
488 * Functions to read planar input, such as planar RGB, and convert
489 * internally to Y/UV.
492 void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width);
493 void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4],
498 * Scale one horizontal line of input data using a bilinear filter
499 * to produce one line of output data. Compared to SwsContext->hScale(),
500 * please take note of the following caveats when using these:
501 * - Scaling is done using only 7bit instead of 14bit coefficients.
502 * - You can use no more than 5 input pixels to produce 4 output
503 * pixels. Therefore, this filter should not be used for downscaling
504 * by more than ~20% in width (because that equals more than 5/4th
505 * downscaling and thus more than 5 pixels input per 4 pixels output).
506 * - In general, bilinear filters create artifacts during downscaling
507 * (even when <20%), because one output pixel will span more than one
508 * input pixel, and thus some pixels will need edges of both neighbor
509 * pixels to interpolate the output pixel. Since you can use at most
510 * two input pixels per output pixel in bilinear scaling, this is
511 * impossible and thus downscaling by any size will create artifacts.
512 * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
513 * in SwsContext->flags.
516 void (*hyscale_fast)(struct SwsContext *c,
517 int16_t *dst, int dstWidth,
518 const uint8_t *src, int srcW, int xInc);
519 void (*hcscale_fast)(struct SwsContext *c,
520 int16_t *dst1, int16_t *dst2, int dstWidth,
521 const uint8_t *src1, const uint8_t *src2,
526 * Scale one horizontal line of input data using a filter over the input
527 * lines, to produce one (differently sized) line of output data.
529 * @param dst pointer to destination buffer for horizontally scaled
530 * data. If the number of bits per component of one
531 * destination pixel (SwsContext->dstBpc) is <= 10, data
532 * will be 15bpc in 16bits (int16_t) width. Else (i.e.
533 * SwsContext->dstBpc == 16), data will be 19bpc in
534 * 32bits (int32_t) width.
535 * @param dstW width of destination image
536 * @param src pointer to source data to be scaled. If the number of
537 * bits per component of a source pixel (SwsContext->srcBpc)
538 * is 8, this is 8bpc in 8bits (uint8_t) width. Else
539 * (i.e. SwsContext->dstBpc > 8), this is native depth
540 * in 16bits (uint16_t) width. In other words, for 9-bit
541 * YUV input, this is 9bpc, for 10-bit YUV input, this is
542 * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
543 * @param filter filter coefficients to be used per output pixel for
544 * scaling. This contains 14bpp filtering coefficients.
545 * Guaranteed to contain dstW * filterSize entries.
546 * @param filterPos position of the first input pixel to be used for
547 * each output pixel during scaling. Guaranteed to
548 * contain dstW entries.
549 * @param filterSize the number of input coefficients to be used (and
550 * thus the number of input pixels to be used) for
551 * creating a single output pixel. Is aligned to 4
552 * (and input coefficients thus padded with zeroes)
553 * to simplify creating SIMD code.
556 void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
557 const uint8_t *src, const int16_t *filter,
558 const int32_t *filterPos, int filterSize);
559 void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
560 const uint8_t *src, const int16_t *filter,
561 const int32_t *filterPos, int filterSize);
564 /// Color range conversion function for luma plane if needed.
565 void (*lumConvertRange)(int16_t *dst, int width);
566 /// Color range conversion function for chroma planes if needed.
567 void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width);
569 int needs_hcscale; ///< Set if there are chroma planes to be converted.
571 //FIXME check init (where 0)
573 SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
574 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
575 int fullRange, int brightness,
576 int contrast, int saturation);
578 void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
579 int brightness, int contrast, int saturation);
580 void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
581 int lastInLumBuf, int lastInChrBuf);
583 SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c);
584 SwsFunc ff_yuv2rgb_init_vis(SwsContext *c);
585 SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c);
586 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c);
587 void ff_bfin_get_unscaled_swscale(SwsContext *c);
589 #if FF_API_SWS_FORMAT_NAME
591 * @deprecated Use av_get_pix_fmt_name() instead.
594 const char *sws_format_name(enum AVPixelFormat format);
597 static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
599 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
601 return desc->comp[0].depth_minus1 == 15;
604 static av_always_inline int is9_OR_10BPS(enum AVPixelFormat pix_fmt)
606 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
608 return desc->comp[0].depth_minus1 >= 8 && desc->comp[0].depth_minus1 <= 13;
611 #define isNBPS(x) is9_OR_10BPS(x)
613 static av_always_inline int isBE(enum AVPixelFormat pix_fmt)
615 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
617 return desc->flags & PIX_FMT_BE;
620 static av_always_inline int isYUV(enum AVPixelFormat pix_fmt)
622 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
624 return !(desc->flags & PIX_FMT_RGB) && desc->nb_components >= 2;
627 static av_always_inline int isPlanarYUV(enum AVPixelFormat pix_fmt)
629 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
631 return ((desc->flags & PIX_FMT_PLANAR) && isYUV(pix_fmt));
634 static av_always_inline int isRGB(enum AVPixelFormat pix_fmt)
636 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
638 return (desc->flags & PIX_FMT_RGB);
643 (!(av_pix_fmt_desc_get(x)->flags & PIX_FMT_PAL) && \
644 av_pix_fmt_desc_get(x)->nb_components <= 2)
647 ((x) == AV_PIX_FMT_GRAY8 || \
648 (x) == AV_PIX_FMT_Y400A || \
649 (x) == AV_PIX_FMT_GRAY16BE || \
650 (x) == AV_PIX_FMT_GRAY16LE)
653 #define isRGBinInt(x) \
655 (x) == AV_PIX_FMT_RGB48BE || \
656 (x) == AV_PIX_FMT_RGB48LE || \
657 (x) == AV_PIX_FMT_RGBA64BE || \
658 (x) == AV_PIX_FMT_RGBA64LE || \
659 (x) == AV_PIX_FMT_RGB32 || \
660 (x) == AV_PIX_FMT_RGB32_1 || \
661 (x) == AV_PIX_FMT_RGB24 || \
662 (x) == AV_PIX_FMT_RGB565BE || \
663 (x) == AV_PIX_FMT_RGB565LE || \
664 (x) == AV_PIX_FMT_RGB555BE || \
665 (x) == AV_PIX_FMT_RGB555LE || \
666 (x) == AV_PIX_FMT_RGB444BE || \
667 (x) == AV_PIX_FMT_RGB444LE || \
668 (x) == AV_PIX_FMT_RGB8 || \
669 (x) == AV_PIX_FMT_RGB4 || \
670 (x) == AV_PIX_FMT_RGB4_BYTE || \
671 (x) == AV_PIX_FMT_MONOBLACK || \
672 (x) == AV_PIX_FMT_MONOWHITE \
674 #define isBGRinInt(x) \
676 (x) == AV_PIX_FMT_BGR48BE || \
677 (x) == AV_PIX_FMT_BGR48LE || \
678 (x) == AV_PIX_FMT_BGRA64BE || \
679 (x) == AV_PIX_FMT_BGRA64LE || \
680 (x) == AV_PIX_FMT_BGR32 || \
681 (x) == AV_PIX_FMT_BGR32_1 || \
682 (x) == AV_PIX_FMT_BGR24 || \
683 (x) == AV_PIX_FMT_BGR565BE || \
684 (x) == AV_PIX_FMT_BGR565LE || \
685 (x) == AV_PIX_FMT_BGR555BE || \
686 (x) == AV_PIX_FMT_BGR555LE || \
687 (x) == AV_PIX_FMT_BGR444BE || \
688 (x) == AV_PIX_FMT_BGR444LE || \
689 (x) == AV_PIX_FMT_BGR8 || \
690 (x) == AV_PIX_FMT_BGR4 || \
691 (x) == AV_PIX_FMT_BGR4_BYTE || \
692 (x) == AV_PIX_FMT_MONOBLACK || \
693 (x) == AV_PIX_FMT_MONOWHITE \
696 #define isRGBinBytes(x) ( \
697 (x) == AV_PIX_FMT_RGB48BE \
698 || (x) == AV_PIX_FMT_RGB48LE \
699 || (x) == AV_PIX_FMT_RGBA64BE \
700 || (x) == AV_PIX_FMT_RGBA64LE \
701 || (x) == AV_PIX_FMT_RGBA \
702 || (x) == AV_PIX_FMT_ARGB \
703 || (x) == AV_PIX_FMT_RGB24 \
705 #define isBGRinBytes(x) ( \
706 (x) == AV_PIX_FMT_BGR48BE \
707 || (x) == AV_PIX_FMT_BGR48LE \
708 || (x) == AV_PIX_FMT_BGRA64BE \
709 || (x) == AV_PIX_FMT_BGRA64LE \
710 || (x) == AV_PIX_FMT_BGRA \
711 || (x) == AV_PIX_FMT_ABGR \
712 || (x) == AV_PIX_FMT_BGR24 \
715 #define isAnyRGB(x) \
720 (x)==AV_PIX_FMT_GBRP9LE || \
721 (x)==AV_PIX_FMT_GBRP9BE || \
722 (x)==AV_PIX_FMT_GBRP10LE || \
723 (x)==AV_PIX_FMT_GBRP10BE || \
724 (x)==AV_PIX_FMT_GBRP12LE || \
725 (x)==AV_PIX_FMT_GBRP12BE || \
726 (x)==AV_PIX_FMT_GBRP14LE || \
727 (x)==AV_PIX_FMT_GBRP14BE || \
728 (x)==AV_PIX_FMT_GBR24P \
731 static av_always_inline int isALPHA(enum AVPixelFormat pix_fmt)
733 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
735 return desc->flags & PIX_FMT_ALPHA;
739 #define isPacked(x) ( \
740 (x)==AV_PIX_FMT_PAL8 \
741 || (x)==AV_PIX_FMT_YUYV422 \
742 || (x)==AV_PIX_FMT_UYVY422 \
743 || (x)==AV_PIX_FMT_Y400A \
748 static av_always_inline int isPacked(enum AVPixelFormat pix_fmt)
750 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
752 return ((desc->nb_components >= 2 && !(desc->flags & PIX_FMT_PLANAR)) ||
753 pix_fmt == AV_PIX_FMT_PAL8);
757 static av_always_inline int isPlanar(enum AVPixelFormat pix_fmt)
759 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
761 return (desc->nb_components >= 2 && (desc->flags & PIX_FMT_PLANAR));
764 static av_always_inline int isPackedRGB(enum AVPixelFormat pix_fmt)
766 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
768 return ((desc->flags & (PIX_FMT_PLANAR | PIX_FMT_RGB)) == PIX_FMT_RGB);
771 static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt)
773 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
775 return ((desc->flags & (PIX_FMT_PLANAR | PIX_FMT_RGB)) ==
776 (PIX_FMT_PLANAR | PIX_FMT_RGB));
779 static av_always_inline int usePal(enum AVPixelFormat pix_fmt)
781 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
783 return (desc->flags & PIX_FMT_PAL) || (desc->flags & PIX_FMT_PSEUDOPAL);
786 extern const uint64_t ff_dither4[2];
787 extern const uint64_t ff_dither8[2];
788 extern const uint8_t dithers[8][8][8];
789 extern const uint16_t dither_scale[15][16];
792 extern const AVClass sws_context_class;
795 * Set c->swScale to an unscaled converter if one exists for the specific
796 * source and destination formats, bit depths, flags, etc.
798 void ff_get_unscaled_swscale(SwsContext *c);
800 void ff_swscale_get_unscaled_altivec(SwsContext *c);
803 * Return function pointer to fastest main scaler path function depending
804 * on architecture and available optimizations.
806 SwsFunc ff_getSwsFunc(SwsContext *c);
808 void ff_sws_init_input_funcs(SwsContext *c);
809 void ff_sws_init_output_funcs(SwsContext *c,
810 yuv2planar1_fn *yuv2plane1,
811 yuv2planarX_fn *yuv2planeX,
812 yuv2interleavedX_fn *yuv2nv12cX,
813 yuv2packed1_fn *yuv2packed1,
814 yuv2packed2_fn *yuv2packed2,
815 yuv2packedX_fn *yuv2packedX,
816 yuv2anyX_fn *yuv2anyX);
817 void ff_sws_init_swScale_altivec(SwsContext *c);
818 void ff_sws_init_swScale_mmx(SwsContext *c);
820 static inline void fillPlane16(uint8_t *plane, int stride, int width, int height, int y,
821 int alpha, int bits, const int big_endian)
824 uint8_t *ptr = plane + stride * y;
825 int v = alpha ? 0xFFFF>>(15-bits) : (1<<bits);
826 for (i = 0; i < height; i++) {
827 #define FILL(wfunc) \
828 for (j = 0; j < width; j++) {\
840 #endif /* SWSCALE_SWSCALE_INTERNAL_H */