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 MAX_FILTER_SIZE SWS_MAX_FILTER_SIZE
47 #define ALT32_CORR (-1)
64 typedef enum SwsDither {
74 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[],
75 int srcStride[], int srcSliceY, int srcSliceH,
76 uint8_t *dst[], int dstStride[]);
79 * Write one line of horizontally scaled data to planar output
80 * without any additional vertical scaling (or point-scaling).
82 * @param src scaled source data, 15bit for 8-10bit output,
83 * 19-bit for 16bit output (in int32_t)
84 * @param dest pointer to the output plane. For >8bit
85 * output, this is in uint16_t
86 * @param dstW width of destination in pixels
87 * @param dither ordered dither array of type int16_t and size 8
88 * @param offset Dither offset
90 typedef void (*yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW,
91 const uint8_t *dither, int offset);
94 * Write one line of horizontally scaled data to planar output
95 * with multi-point vertical scaling between input pixels.
97 * @param filter vertical luma/alpha scaling coefficients, 12bit [0,4096]
98 * @param src scaled luma (Y) or alpha (A) source data, 15bit for 8-10bit output,
99 * 19-bit for 16bit output (in int32_t)
100 * @param filterSize number of vertical input lines to scale
101 * @param dest pointer to output plane. For >8bit
102 * output, this is in uint16_t
103 * @param dstW width of destination pixels
104 * @param offset Dither offset
106 typedef void (*yuv2planarX_fn)(const int16_t *filter, int filterSize,
107 const int16_t **src, uint8_t *dest, int dstW,
108 const uint8_t *dither, int offset);
111 * Write one line of horizontally scaled chroma to interleaved output
112 * with multi-point vertical scaling between input pixels.
114 * @param c SWS scaling context
115 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
116 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
117 * 19-bit for 16bit output (in int32_t)
118 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
119 * 19-bit for 16bit output (in int32_t)
120 * @param chrFilterSize number of vertical chroma input lines to scale
121 * @param dest pointer to the output plane. For >8bit
122 * output, this is in uint16_t
123 * @param dstW width of chroma planes
125 typedef void (*yuv2interleavedX_fn)(struct SwsContext *c,
126 const int16_t *chrFilter,
128 const int16_t **chrUSrc,
129 const int16_t **chrVSrc,
130 uint8_t *dest, int dstW);
133 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
134 * output without any additional vertical scaling (or point-scaling). Note
135 * that this function may do chroma scaling, see the "uvalpha" argument.
137 * @param c SWS scaling context
138 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
139 * 19-bit for 16bit output (in int32_t)
140 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
141 * 19-bit for 16bit output (in int32_t)
142 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
143 * 19-bit for 16bit output (in int32_t)
144 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
145 * 19-bit for 16bit output (in int32_t)
146 * @param dest pointer to the output plane. For 16bit output, this is
148 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
149 * to write into dest[]
150 * @param uvalpha chroma scaling coefficient for the second line of chroma
151 * pixels, either 2048 or 0. If 0, one chroma input is used
152 * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
153 * is set, it generates 1 output pixel). If 2048, two chroma
154 * input pixels should be averaged for 2 output pixels (this
155 * only happens if SWS_FLAG_FULL_CHR_INT is not set)
156 * @param y vertical line number for this output. This does not need
157 * to be used to calculate the offset in the destination,
158 * but can be used to generate comfort noise using dithering
159 * for some output formats.
161 typedef void (*yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc,
162 const int16_t *chrUSrc[2],
163 const int16_t *chrVSrc[2],
164 const int16_t *alpSrc, uint8_t *dest,
165 int dstW, int uvalpha, int y);
167 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
168 * output by doing bilinear scaling between two input lines.
170 * @param c SWS scaling context
171 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
172 * 19-bit for 16bit output (in int32_t)
173 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
174 * 19-bit for 16bit output (in int32_t)
175 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
176 * 19-bit for 16bit output (in int32_t)
177 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
178 * 19-bit for 16bit output (in int32_t)
179 * @param dest pointer to the output plane. For 16bit output, this is
181 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
182 * to write into dest[]
183 * @param yalpha luma/alpha scaling coefficients for the second input line.
184 * The first line's coefficients can be calculated by using
186 * @param uvalpha chroma scaling coefficient for the second input line. The
187 * first line's coefficients can be calculated by using
189 * @param y vertical line number for this output. This does not need
190 * to be used to calculate the offset in the destination,
191 * but can be used to generate comfort noise using dithering
192 * for some output formats.
194 typedef void (*yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2],
195 const int16_t *chrUSrc[2],
196 const int16_t *chrVSrc[2],
197 const int16_t *alpSrc[2],
199 int dstW, int yalpha, int uvalpha, int y);
201 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
202 * output by doing multi-point vertical scaling between input pixels.
204 * @param c SWS scaling context
205 * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
206 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
207 * 19-bit for 16bit output (in int32_t)
208 * @param lumFilterSize number of vertical luma/alpha input lines to scale
209 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
210 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
211 * 19-bit for 16bit output (in int32_t)
212 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
213 * 19-bit for 16bit output (in int32_t)
214 * @param chrFilterSize number of vertical chroma input lines to scale
215 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
216 * 19-bit for 16bit output (in int32_t)
217 * @param dest pointer to the output plane. For 16bit output, this is
219 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
220 * to write into dest[]
221 * @param y vertical line number for this output. This does not need
222 * to be used to calculate the offset in the destination,
223 * but can be used to generate comfort noise using dithering
224 * or some output formats.
226 typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
227 const int16_t **lumSrc, int lumFilterSize,
228 const int16_t *chrFilter,
229 const int16_t **chrUSrc,
230 const int16_t **chrVSrc, int chrFilterSize,
231 const int16_t **alpSrc, uint8_t *dest,
235 * Write one line of horizontally scaled Y/U/V/A to YUV/RGB
236 * output by doing multi-point vertical scaling between input pixels.
238 * @param c SWS scaling context
239 * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
240 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
241 * 19-bit for 16bit output (in int32_t)
242 * @param lumFilterSize number of vertical luma/alpha input lines to scale
243 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
244 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
245 * 19-bit for 16bit output (in int32_t)
246 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
247 * 19-bit for 16bit output (in int32_t)
248 * @param chrFilterSize number of vertical chroma input lines to scale
249 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
250 * 19-bit for 16bit output (in int32_t)
251 * @param dest pointer to the output planes. For 16bit output, this is
253 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
254 * to write into dest[]
255 * @param y vertical line number for this output. This does not need
256 * to be used to calculate the offset in the destination,
257 * but can be used to generate comfort noise using dithering
258 * or some output formats.
260 typedef void (*yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter,
261 const int16_t **lumSrc, int lumFilterSize,
262 const int16_t *chrFilter,
263 const int16_t **chrUSrc,
264 const int16_t **chrVSrc, int chrFilterSize,
265 const int16_t **alpSrc, uint8_t **dest,
268 /* This struct should be aligned on at least a 32-byte boundary. */
269 typedef struct SwsContext {
271 * info on struct for av_log
273 const AVClass *av_class;
276 * Note that src, dst, srcStride, dstStride will be copied in the
277 * sws_scale() wrapper so they can be freely modified here.
280 int srcW; ///< Width of source luma/alpha planes.
281 int srcH; ///< Height of source luma/alpha planes.
282 int dstH; ///< Height of destination luma/alpha planes.
283 int chrSrcW; ///< Width of source chroma planes.
284 int chrSrcH; ///< Height of source chroma planes.
285 int chrDstW; ///< Width of destination chroma planes.
286 int chrDstH; ///< Height of destination chroma planes.
287 int lumXInc, chrXInc;
288 int lumYInc, chrYInc;
289 enum AVPixelFormat dstFormat; ///< Destination pixel format.
290 enum AVPixelFormat srcFormat; ///< Source pixel format.
291 int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
292 int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
294 int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
295 int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
296 int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
297 int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
298 int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
299 int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
300 double param[2]; ///< Input parameters for scaling algorithms that need them.
302 uint32_t pal_yuv[256];
303 uint32_t pal_rgb[256];
306 * @name Scaled horizontal lines ring buffer.
307 * The horizontal scaler keeps just enough scaled lines in a ring buffer
308 * so they may be passed to the vertical scaler. The pointers to the
309 * allocated buffers for each line are duplicated in sequence in the ring
310 * buffer to simplify indexing and avoid wrapping around between lines
311 * inside the vertical scaler code. The wrapping is done before the
312 * vertical scaler is called.
315 int16_t **lumPixBuf; ///< Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.
316 int16_t **chrUPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
317 int16_t **chrVPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
318 int16_t **alpPixBuf; ///< Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.
319 int vLumBufSize; ///< Number of vertical luma/alpha lines allocated in the ring buffer.
320 int vChrBufSize; ///< Number of vertical chroma lines allocated in the ring buffer.
321 int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
322 int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
323 int lumBufIndex; ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
324 int chrBufIndex; ///< Index in ring buffer of the last scaled horizontal chroma line from source.
327 uint8_t *formatConvBuffer;
330 * @name Horizontal and vertical filters.
331 * To better understand the following fields, here is a pseudo-code of
332 * their usage in filtering a horizontal line:
334 * for (i = 0; i < width; i++) {
336 * for (j = 0; j < filterSize; j++)
337 * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
338 * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
343 int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
344 int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
345 int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
346 int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
347 int32_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
348 int32_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
349 int32_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
350 int32_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
351 int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
352 int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
353 int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
354 int vChrFilterSize; ///< Vertical filter size for chroma pixels.
357 int lumMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes.
358 int chrMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
359 uint8_t *lumMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
360 uint8_t *chrMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
364 int dstY; ///< Last destination vertical line output from last slice.
365 int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
366 void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
367 // alignment ensures the offset can be added in a single
368 // instruction on e.g. ARM
369 DECLARE_ALIGNED(16, int, table_gV)[256 + 2*YUVRGB_TABLE_HEADROOM];
370 uint8_t *table_rV[256 + 2*YUVRGB_TABLE_HEADROOM];
371 uint8_t *table_gU[256 + 2*YUVRGB_TABLE_HEADROOM];
372 uint8_t *table_bU[256 + 2*YUVRGB_TABLE_HEADROOM];
373 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
383 #define RGB2YUV_SHIFT 15
385 int *dither_error[4];
388 int contrast, brightness, saturation; // for sws_getColorspaceDetails
389 int srcColorspaceTable[4];
390 int dstColorspaceTable[4];
391 int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
392 int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
401 int yuv2rgb_y_offset;
403 int yuv2rgb_v2r_coeff;
404 int yuv2rgb_v2g_coeff;
405 int yuv2rgb_u2g_coeff;
406 int yuv2rgb_u2b_coeff;
408 #define RED_DITHER "0*8"
409 #define GREEN_DITHER "1*8"
410 #define BLUE_DITHER "2*8"
411 #define Y_COEFF "3*8"
412 #define VR_COEFF "4*8"
413 #define UB_COEFF "5*8"
414 #define VG_COEFF "6*8"
415 #define UG_COEFF "7*8"
416 #define Y_OFFSET "8*8"
417 #define U_OFFSET "9*8"
418 #define V_OFFSET "10*8"
419 #define LUM_MMX_FILTER_OFFSET "11*8"
420 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)
421 #define DSTW_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2"
422 #define ESP_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+8"
423 #define VROUNDER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+16"
424 #define U_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+24"
425 #define V_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+32"
426 #define Y_TEMP "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+40"
427 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*2+48"
428 #define UV_OFF_PX "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+48"
429 #define UV_OFF_BYTE "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+56"
430 #define DITHER16 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+64"
431 #define DITHER32 "11*8+4*4*"AV_STRINGIFY(MAX_FILTER_SIZE)"*3+80"
432 #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
434 DECLARE_ALIGNED(8, uint64_t, redDither);
435 DECLARE_ALIGNED(8, uint64_t, greenDither);
436 DECLARE_ALIGNED(8, uint64_t, blueDither);
438 DECLARE_ALIGNED(8, uint64_t, yCoeff);
439 DECLARE_ALIGNED(8, uint64_t, vrCoeff);
440 DECLARE_ALIGNED(8, uint64_t, ubCoeff);
441 DECLARE_ALIGNED(8, uint64_t, vgCoeff);
442 DECLARE_ALIGNED(8, uint64_t, ugCoeff);
443 DECLARE_ALIGNED(8, uint64_t, yOffset);
444 DECLARE_ALIGNED(8, uint64_t, uOffset);
445 DECLARE_ALIGNED(8, uint64_t, vOffset);
446 int32_t lumMmxFilter[4 * MAX_FILTER_SIZE];
447 int32_t chrMmxFilter[4 * MAX_FILTER_SIZE];
448 int dstW; ///< Width of destination luma/alpha planes.
449 DECLARE_ALIGNED(8, uint64_t, esp);
450 DECLARE_ALIGNED(8, uint64_t, vRounder);
451 DECLARE_ALIGNED(8, uint64_t, u_temp);
452 DECLARE_ALIGNED(8, uint64_t, v_temp);
453 DECLARE_ALIGNED(8, uint64_t, y_temp);
454 int32_t alpMmxFilter[4 * MAX_FILTER_SIZE];
455 // alignment of these values is not necessary, but merely here
456 // to maintain the same offset across x8632 and x86-64. Once we
457 // use proper offset macros in the asm, they can be removed.
458 DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes
459 DECLARE_ALIGNED(8, ptrdiff_t, uv_offx2); ///< offset (in bytes) between u and v planes
460 DECLARE_ALIGNED(8, uint16_t, dither16)[8];
461 DECLARE_ALIGNED(8, uint32_t, dither32)[8];
463 const uint8_t *chrDither8, *lumDither8;
466 vector signed short CY;
467 vector signed short CRV;
468 vector signed short CBU;
469 vector signed short CGU;
470 vector signed short CGV;
471 vector signed short OY;
472 vector unsigned short CSHIFT;
473 vector signed short *vYCoeffsBank, *vCCoeffsBank;
478 /* pre defined color-spaces gamma */
479 #define XYZ_GAMMA (2.6f)
480 #define RGB_GAMMA (2.2f)
483 int16_t *xyzgammainv;
484 int16_t *rgbgammainv;
485 int16_t xyz2rgb_matrix[3][4];
486 int16_t rgb2xyz_matrix[3][4];
488 /* function pointers for swscale() */
489 yuv2planar1_fn yuv2plane1;
490 yuv2planarX_fn yuv2planeX;
491 yuv2interleavedX_fn yuv2nv12cX;
492 yuv2packed1_fn yuv2packed1;
493 yuv2packed2_fn yuv2packed2;
494 yuv2packedX_fn yuv2packedX;
495 yuv2anyX_fn yuv2anyX;
497 /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
498 void (*lumToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
499 int width, uint32_t *pal);
500 /// Unscaled conversion of alpha plane to YV12 for horizontal scaler.
501 void (*alpToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3,
502 int width, uint32_t *pal);
503 /// Unscaled conversion of chroma planes to YV12 for horizontal scaler.
504 void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
505 const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
506 int width, uint32_t *pal);
509 * Functions to read planar input, such as planar RGB, and convert
510 * internally to Y/UV/A.
513 void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv);
514 void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4],
515 int width, int32_t *rgb2yuv);
516 void (*readAlpPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv);
520 * Scale one horizontal line of input data using a bilinear filter
521 * to produce one line of output data. Compared to SwsContext->hScale(),
522 * please take note of the following caveats when using these:
523 * - Scaling is done using only 7bit instead of 14bit coefficients.
524 * - You can use no more than 5 input pixels to produce 4 output
525 * pixels. Therefore, this filter should not be used for downscaling
526 * by more than ~20% in width (because that equals more than 5/4th
527 * downscaling and thus more than 5 pixels input per 4 pixels output).
528 * - In general, bilinear filters create artifacts during downscaling
529 * (even when <20%), because one output pixel will span more than one
530 * input pixel, and thus some pixels will need edges of both neighbor
531 * pixels to interpolate the output pixel. Since you can use at most
532 * two input pixels per output pixel in bilinear scaling, this is
533 * impossible and thus downscaling by any size will create artifacts.
534 * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
535 * in SwsContext->flags.
538 void (*hyscale_fast)(struct SwsContext *c,
539 int16_t *dst, int dstWidth,
540 const uint8_t *src, int srcW, int xInc);
541 void (*hcscale_fast)(struct SwsContext *c,
542 int16_t *dst1, int16_t *dst2, int dstWidth,
543 const uint8_t *src1, const uint8_t *src2,
548 * Scale one horizontal line of input data using a filter over the input
549 * lines, to produce one (differently sized) line of output data.
551 * @param dst pointer to destination buffer for horizontally scaled
552 * data. If the number of bits per component of one
553 * destination pixel (SwsContext->dstBpc) is <= 10, data
554 * will be 15bpc in 16bits (int16_t) width. Else (i.e.
555 * SwsContext->dstBpc == 16), data will be 19bpc in
556 * 32bits (int32_t) width.
557 * @param dstW width of destination image
558 * @param src pointer to source data to be scaled. If the number of
559 * bits per component of a source pixel (SwsContext->srcBpc)
560 * is 8, this is 8bpc in 8bits (uint8_t) width. Else
561 * (i.e. SwsContext->dstBpc > 8), this is native depth
562 * in 16bits (uint16_t) width. In other words, for 9-bit
563 * YUV input, this is 9bpc, for 10-bit YUV input, this is
564 * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
565 * @param filter filter coefficients to be used per output pixel for
566 * scaling. This contains 14bpp filtering coefficients.
567 * Guaranteed to contain dstW * filterSize entries.
568 * @param filterPos position of the first input pixel to be used for
569 * each output pixel during scaling. Guaranteed to
570 * contain dstW entries.
571 * @param filterSize the number of input coefficients to be used (and
572 * thus the number of input pixels to be used) for
573 * creating a single output pixel. Is aligned to 4
574 * (and input coefficients thus padded with zeroes)
575 * to simplify creating SIMD code.
578 void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
579 const uint8_t *src, const int16_t *filter,
580 const int32_t *filterPos, int filterSize);
581 void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
582 const uint8_t *src, const int16_t *filter,
583 const int32_t *filterPos, int filterSize);
586 /// Color range conversion function for luma plane if needed.
587 void (*lumConvertRange)(int16_t *dst, int width);
588 /// Color range conversion function for chroma planes if needed.
589 void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width);
591 int needs_hcscale; ///< Set if there are chroma planes to be converted.
595 //FIXME check init (where 0)
597 SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
598 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
599 int fullRange, int brightness,
600 int contrast, int saturation);
601 void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4],
602 int brightness, int contrast, int saturation);
604 void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
605 int lastInLumBuf, int lastInChrBuf);
607 av_cold void ff_sws_init_range_convert(SwsContext *c);
609 SwsFunc ff_yuv2rgb_init_x86(SwsContext *c);
610 SwsFunc ff_yuv2rgb_init_ppc(SwsContext *c);
612 #if FF_API_SWS_FORMAT_NAME
614 * @deprecated Use av_get_pix_fmt_name() instead.
617 const char *sws_format_name(enum AVPixelFormat format);
620 static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
622 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
624 return desc->comp[0].depth_minus1 == 15;
627 static av_always_inline int is9_OR_10BPS(enum AVPixelFormat pix_fmt)
629 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
631 return desc->comp[0].depth_minus1 >= 8 && desc->comp[0].depth_minus1 <= 13;
634 #define isNBPS(x) is9_OR_10BPS(x)
636 static av_always_inline int isBE(enum AVPixelFormat pix_fmt)
638 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
640 return desc->flags & AV_PIX_FMT_FLAG_BE;
643 static av_always_inline int isYUV(enum AVPixelFormat pix_fmt)
645 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
647 return !(desc->flags & AV_PIX_FMT_FLAG_RGB) && desc->nb_components >= 2;
650 static av_always_inline int isPlanarYUV(enum AVPixelFormat pix_fmt)
652 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
654 return ((desc->flags & AV_PIX_FMT_FLAG_PLANAR) && isYUV(pix_fmt));
657 static av_always_inline int isRGB(enum AVPixelFormat pix_fmt)
659 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
661 return (desc->flags & AV_PIX_FMT_FLAG_RGB);
666 (!(av_pix_fmt_desc_get(x)->flags & AV_PIX_FMT_FLAG_PAL) && \
667 av_pix_fmt_desc_get(x)->nb_components <= 2)
670 ((x) == AV_PIX_FMT_GRAY8 || \
671 (x) == AV_PIX_FMT_Y400A || \
672 (x) == AV_PIX_FMT_GRAY16BE || \
673 (x) == AV_PIX_FMT_GRAY16LE)
676 #define isRGBinInt(x) \
678 (x) == AV_PIX_FMT_RGB48BE || \
679 (x) == AV_PIX_FMT_RGB48LE || \
680 (x) == AV_PIX_FMT_RGB32 || \
681 (x) == AV_PIX_FMT_RGB32_1 || \
682 (x) == AV_PIX_FMT_RGB24 || \
683 (x) == AV_PIX_FMT_RGB565BE || \
684 (x) == AV_PIX_FMT_RGB565LE || \
685 (x) == AV_PIX_FMT_RGB555BE || \
686 (x) == AV_PIX_FMT_RGB555LE || \
687 (x) == AV_PIX_FMT_RGB444BE || \
688 (x) == AV_PIX_FMT_RGB444LE || \
689 (x) == AV_PIX_FMT_RGB8 || \
690 (x) == AV_PIX_FMT_RGB4 || \
691 (x) == AV_PIX_FMT_RGB4_BYTE || \
692 (x) == AV_PIX_FMT_RGBA64BE || \
693 (x) == AV_PIX_FMT_RGBA64LE || \
694 (x) == AV_PIX_FMT_MONOBLACK || \
695 (x) == AV_PIX_FMT_MONOWHITE \
697 #define isBGRinInt(x) \
699 (x) == AV_PIX_FMT_BGR48BE || \
700 (x) == AV_PIX_FMT_BGR48LE || \
701 (x) == AV_PIX_FMT_BGR32 || \
702 (x) == AV_PIX_FMT_BGR32_1 || \
703 (x) == AV_PIX_FMT_BGR24 || \
704 (x) == AV_PIX_FMT_BGR565BE || \
705 (x) == AV_PIX_FMT_BGR565LE || \
706 (x) == AV_PIX_FMT_BGR555BE || \
707 (x) == AV_PIX_FMT_BGR555LE || \
708 (x) == AV_PIX_FMT_BGR444BE || \
709 (x) == AV_PIX_FMT_BGR444LE || \
710 (x) == AV_PIX_FMT_BGR8 || \
711 (x) == AV_PIX_FMT_BGR4 || \
712 (x) == AV_PIX_FMT_BGR4_BYTE || \
713 (x) == AV_PIX_FMT_BGRA64BE || \
714 (x) == AV_PIX_FMT_BGRA64LE || \
715 (x) == AV_PIX_FMT_MONOBLACK || \
716 (x) == AV_PIX_FMT_MONOWHITE \
719 #define isRGBinBytes(x) ( \
720 (x) == AV_PIX_FMT_RGB48BE \
721 || (x) == AV_PIX_FMT_RGB48LE \
722 || (x) == AV_PIX_FMT_RGBA64BE \
723 || (x) == AV_PIX_FMT_RGBA64LE \
724 || (x) == AV_PIX_FMT_RGBA \
725 || (x) == AV_PIX_FMT_ARGB \
726 || (x) == AV_PIX_FMT_RGB24 \
728 #define isBGRinBytes(x) ( \
729 (x) == AV_PIX_FMT_BGR48BE \
730 || (x) == AV_PIX_FMT_BGR48LE \
731 || (x) == AV_PIX_FMT_BGRA64BE \
732 || (x) == AV_PIX_FMT_BGRA64LE \
733 || (x) == AV_PIX_FMT_BGRA \
734 || (x) == AV_PIX_FMT_ABGR \
735 || (x) == AV_PIX_FMT_BGR24 \
738 #define isBayer(x) ( \
739 (x)==AV_PIX_FMT_BAYER_BGGR8 \
740 || (x)==AV_PIX_FMT_BAYER_BGGR16LE \
741 || (x)==AV_PIX_FMT_BAYER_BGGR16BE \
742 || (x)==AV_PIX_FMT_BAYER_RGGB8 \
743 || (x)==AV_PIX_FMT_BAYER_RGGB16LE \
744 || (x)==AV_PIX_FMT_BAYER_RGGB16BE \
745 || (x)==AV_PIX_FMT_BAYER_GBRG8 \
746 || (x)==AV_PIX_FMT_BAYER_GBRG16LE \
747 || (x)==AV_PIX_FMT_BAYER_GBRG16BE \
748 || (x)==AV_PIX_FMT_BAYER_GRBG8 \
749 || (x)==AV_PIX_FMT_BAYER_GRBG16LE \
750 || (x)==AV_PIX_FMT_BAYER_GRBG16BE \
753 #define isAnyRGB(x) \
761 static av_always_inline int isALPHA(enum AVPixelFormat pix_fmt)
763 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
765 if (pix_fmt == AV_PIX_FMT_PAL8)
767 return desc->flags & AV_PIX_FMT_FLAG_ALPHA;
771 #define isPacked(x) ( \
772 (x)==AV_PIX_FMT_PAL8 \
773 || (x)==AV_PIX_FMT_YUYV422 \
774 || (x)==AV_PIX_FMT_YVYU422 \
775 || (x)==AV_PIX_FMT_UYVY422 \
776 || (x)==AV_PIX_FMT_Y400A \
781 static av_always_inline int isPacked(enum AVPixelFormat pix_fmt)
783 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
785 return ((desc->nb_components >= 2 && !(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) ||
786 pix_fmt == AV_PIX_FMT_PAL8);
790 static av_always_inline int isPlanar(enum AVPixelFormat pix_fmt)
792 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
794 return (desc->nb_components >= 2 && (desc->flags & AV_PIX_FMT_FLAG_PLANAR));
797 static av_always_inline int isPackedRGB(enum AVPixelFormat pix_fmt)
799 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
801 return ((desc->flags & (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB)) == AV_PIX_FMT_FLAG_RGB);
804 static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt)
806 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
808 return ((desc->flags & (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB)) ==
809 (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB));
812 static av_always_inline int usePal(enum AVPixelFormat pix_fmt)
814 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
816 return (desc->flags & AV_PIX_FMT_FLAG_PAL) || (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL);
819 extern const uint64_t ff_dither4[2];
820 extern const uint64_t ff_dither8[2];
822 extern const uint8_t ff_dither_2x2_4[3][8];
823 extern const uint8_t ff_dither_2x2_8[3][8];
824 extern const uint8_t ff_dither_4x4_16[5][8];
825 extern const uint8_t ff_dither_8x8_32[9][8];
826 extern const uint8_t ff_dither_8x8_73[9][8];
827 extern const uint8_t ff_dither_8x8_128[9][8];
828 extern const uint8_t ff_dither_8x8_220[9][8];
830 extern const int32_t ff_yuv2rgb_coeffs[8][4];
832 extern const AVClass sws_context_class;
835 * Set c->swscale to an unscaled converter if one exists for the specific
836 * source and destination formats, bit depths, flags, etc.
838 void ff_get_unscaled_swscale(SwsContext *c);
839 void ff_get_unscaled_swscale_ppc(SwsContext *c);
840 void ff_get_unscaled_swscale_arm(SwsContext *c);
843 * Return function pointer to fastest main scaler path function depending
844 * on architecture and available optimizations.
846 SwsFunc ff_getSwsFunc(SwsContext *c);
848 void ff_sws_init_input_funcs(SwsContext *c);
849 void ff_sws_init_output_funcs(SwsContext *c,
850 yuv2planar1_fn *yuv2plane1,
851 yuv2planarX_fn *yuv2planeX,
852 yuv2interleavedX_fn *yuv2nv12cX,
853 yuv2packed1_fn *yuv2packed1,
854 yuv2packed2_fn *yuv2packed2,
855 yuv2packedX_fn *yuv2packedX,
856 yuv2anyX_fn *yuv2anyX);
857 void ff_sws_init_swscale_ppc(SwsContext *c);
858 void ff_sws_init_swscale_x86(SwsContext *c);
860 static inline void fillPlane16(uint8_t *plane, int stride, int width, int height, int y,
861 int alpha, int bits, const int big_endian)
864 uint8_t *ptr = plane + stride * y;
865 int v = alpha ? 0xFFFF>>(15-bits) : (1<<bits);
866 for (i = 0; i < height; i++) {
867 #define FILL(wfunc) \
868 for (j = 0; j < width; j++) {\
880 #endif /* SWSCALE_SWSCALE_INTERNAL_H */