2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of Libav.
6 * Libav 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 * Libav 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 Libav; 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/avutil.h"
31 #include "libavutil/log.h"
32 #include "libavutil/pixfmt.h"
33 #include "libavutil/pixdesc.h"
35 #define STR(s) AV_TOSTRING(s) //AV_STRINGIFY is too long
37 #define FAST_BGR2YV12 //use 7-bit instead of 15-bit coefficients
39 #define MAX_FILTER_SIZE 256
42 #define ALT32_CORR (-1)
59 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t* src[],
60 int srcStride[], int srcSliceY, int srcSliceH,
61 uint8_t* dst[], int dstStride[]);
65 * Write one line of horizontally scaled data to planar output
66 * without any additional vertical scaling (or point-scaling).
68 * @param src scaled source data, 15bit for 8-10bit output,
69 * 19-bit for 16bit output (in int32_t)
70 * @param dest pointer to the output plane. For >8bit
71 * output, this is in uint16_t
72 * @param dstW width of destination in pixels
73 * @param dither ordered dither array of type int16_t and size 8
74 * @param offset Dither offset
76 typedef void (*yuv2planar1_fn) (const int16_t *src, uint8_t *dest, int dstW,
77 const uint8_t *dither, int offset);
80 * Write one line of horizontally scaled data to planar output
81 * with multi-point vertical scaling between input pixels.
83 * @param filter vertical luma/alpha scaling coefficients, 12bit [0,4096]
84 * @param src scaled luma (Y) or alpha (A) source data, 15bit for 8-10bit output,
85 * 19-bit for 16bit output (in int32_t)
86 * @param filterSize number of vertical input lines to scale
87 * @param dest pointer to output plane. For >8bit
88 * output, this is in uint16_t
89 * @param dstW width of destination pixels
90 * @param offset Dither offset
92 typedef void (*yuv2planarX_fn) (const int16_t *filter, int filterSize,
93 const int16_t **src, uint8_t *dest, int dstW,
94 const uint8_t *dither, int offset);
97 * Write one line of horizontally scaled chroma to interleaved output
98 * with multi-point vertical scaling between input pixels.
100 * @param c SWS scaling context
101 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
102 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
103 * 19-bit for 16bit output (in int32_t)
104 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
105 * 19-bit for 16bit output (in int32_t)
106 * @param chrFilterSize number of vertical chroma input lines to scale
107 * @param dest pointer to the output plane. For >8bit
108 * output, this is in uint16_t
109 * @param dstW width of chroma planes
111 typedef void (*yuv2interleavedX_fn) (struct SwsContext *c, const int16_t *chrFilter, int chrFilterSize,
112 const int16_t **chrUSrc, const int16_t **chrVSrc,
113 uint8_t *dest, int dstW);
116 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
117 * output without any additional vertical scaling (or point-scaling). Note
118 * that this function may do chroma scaling, see the "uvalpha" argument.
120 * @param c SWS scaling context
121 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
122 * 19-bit for 16bit output (in int32_t)
123 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
124 * 19-bit for 16bit output (in int32_t)
125 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
126 * 19-bit for 16bit output (in int32_t)
127 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
128 * 19-bit for 16bit output (in int32_t)
129 * @param dest pointer to the output plane. For 16bit output, this is
131 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
132 * to write into dest[]
133 * @param uvalpha chroma scaling coefficient for the second line of chroma
134 * pixels, either 2048 or 0. If 0, one chroma input is used
135 * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
136 * is set, it generates 1 output pixel). If 2048, two chroma
137 * input pixels should be averaged for 2 output pixels (this
138 * only happens if SWS_FLAG_FULL_CHR_INT is not set)
139 * @param y vertical line number for this output. This does not need
140 * to be used to calculate the offset in the destination,
141 * but can be used to generate comfort noise using dithering
142 * for some output formats.
144 typedef void (*yuv2packed1_fn) (struct SwsContext *c, const int16_t *lumSrc,
145 const int16_t *chrUSrc[2], const int16_t *chrVSrc[2],
146 const int16_t *alpSrc, uint8_t *dest,
147 int dstW, int uvalpha, int y);
149 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
150 * output by doing bilinear scaling between two input lines.
152 * @param c SWS scaling context
153 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
154 * 19-bit for 16bit output (in int32_t)
155 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
156 * 19-bit for 16bit output (in int32_t)
157 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
158 * 19-bit for 16bit output (in int32_t)
159 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
160 * 19-bit for 16bit output (in int32_t)
161 * @param dest pointer to the output plane. For 16bit output, this is
163 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
164 * to write into dest[]
165 * @param yalpha luma/alpha scaling coefficients for the second input line.
166 * The first line's coefficients can be calculated by using
168 * @param uvalpha chroma scaling coefficient for the second input line. The
169 * first line's coefficients can be calculated by using
171 * @param y vertical line number for this output. This does not need
172 * to be used to calculate the offset in the destination,
173 * but can be used to generate comfort noise using dithering
174 * for some output formats.
176 typedef void (*yuv2packed2_fn) (struct SwsContext *c, const int16_t *lumSrc[2],
177 const int16_t *chrUSrc[2], const int16_t *chrVSrc[2],
178 const int16_t *alpSrc[2], uint8_t *dest,
179 int dstW, int yalpha, int uvalpha, int y);
181 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
182 * output by doing multi-point vertical scaling between input pixels.
184 * @param c SWS scaling context
185 * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
186 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
187 * 19-bit for 16bit output (in int32_t)
188 * @param lumFilterSize number of vertical luma/alpha input lines to scale
189 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
190 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
191 * 19-bit for 16bit output (in int32_t)
192 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
193 * 19-bit for 16bit output (in int32_t)
194 * @param chrFilterSize number of vertical chroma input lines to scale
195 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
196 * 19-bit for 16bit output (in int32_t)
197 * @param dest pointer to the output plane. For 16bit output, this is
199 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
200 * to write into dest[]
201 * @param y vertical line number for this output. This does not need
202 * to be used to calculate the offset in the destination,
203 * but can be used to generate comfort noise using dithering
204 * or some output formats.
206 typedef void (*yuv2packedX_fn) (struct SwsContext *c, const int16_t *lumFilter,
207 const int16_t **lumSrc, int lumFilterSize,
208 const int16_t *chrFilter, const int16_t **chrUSrc,
209 const int16_t **chrVSrc, int chrFilterSize,
210 const int16_t **alpSrc, uint8_t *dest,
213 /* This struct should be aligned on at least a 32-byte boundary. */
214 typedef struct SwsContext {
216 * info on struct for av_log
218 const AVClass *av_class;
221 * Note that src, dst, srcStride, dstStride will be copied in the
222 * sws_scale() wrapper so they can be freely modified here.
225 int srcW; ///< Width of source luma/alpha planes.
226 int srcH; ///< Height of source luma/alpha planes.
227 int dstH; ///< Height of destination luma/alpha planes.
228 int chrSrcW; ///< Width of source chroma planes.
229 int chrSrcH; ///< Height of source chroma planes.
230 int chrDstW; ///< Width of destination chroma planes.
231 int chrDstH; ///< Height of destination chroma planes.
232 int lumXInc, chrXInc;
233 int lumYInc, chrYInc;
234 enum PixelFormat dstFormat; ///< Destination pixel format.
235 enum PixelFormat srcFormat; ///< Source pixel format.
236 int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
237 int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
239 int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
240 int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
241 int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
242 int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
243 int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
244 int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
245 double param[2]; ///< Input parameters for scaling algorithms that need them.
247 uint32_t pal_yuv[256];
248 uint32_t pal_rgb[256];
251 * @name Scaled horizontal lines ring buffer.
252 * The horizontal scaler keeps just enough scaled lines in a ring buffer
253 * so they may be passed to the vertical scaler. The pointers to the
254 * allocated buffers for each line are duplicated in sequence in the ring
255 * buffer to simplify indexing and avoid wrapping around between lines
256 * inside the vertical scaler code. The wrapping is done before the
257 * vertical scaler is called.
260 int16_t **lumPixBuf; ///< Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.
261 int16_t **chrUPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
262 int16_t **chrVPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
263 int16_t **alpPixBuf; ///< Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.
264 int vLumBufSize; ///< Number of vertical luma/alpha lines allocated in the ring buffer.
265 int vChrBufSize; ///< Number of vertical chroma lines allocated in the ring buffer.
266 int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
267 int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
268 int lumBufIndex; ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
269 int chrBufIndex; ///< Index in ring buffer of the last scaled horizontal chroma line from source.
272 uint8_t *formatConvBuffer;
275 * @name Horizontal and vertical filters.
276 * To better understand the following fields, here is a pseudo-code of
277 * their usage in filtering a horizontal line:
279 * for (i = 0; i < width; i++) {
281 * for (j = 0; j < filterSize; j++)
282 * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
283 * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
288 int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
289 int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
290 int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
291 int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
292 int16_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
293 int16_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
294 int16_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
295 int16_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
296 int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
297 int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
298 int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
299 int vChrFilterSize; ///< Vertical filter size for chroma pixels.
302 int lumMmx2FilterCodeSize; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.
303 int chrMmx2FilterCodeSize; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma planes.
304 uint8_t *lumMmx2FilterCode; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.
305 uint8_t *chrMmx2FilterCode; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma planes.
309 int dstY; ///< Last destination vertical line output from last slice.
310 int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
311 void * yuvTable; // pointer to the yuv->rgb table start so it can be freed()
312 uint8_t * table_rV[256];
313 uint8_t * table_gU[256];
315 uint8_t * table_bU[256];
318 int contrast, brightness, saturation; // for sws_getColorspaceDetails
319 int srcColorspaceTable[4];
320 int dstColorspaceTable[4];
321 int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
322 int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
323 int yuv2rgb_y_offset;
325 int yuv2rgb_v2r_coeff;
326 int yuv2rgb_v2g_coeff;
327 int yuv2rgb_u2g_coeff;
328 int yuv2rgb_u2b_coeff;
330 #define RED_DITHER "0*8"
331 #define GREEN_DITHER "1*8"
332 #define BLUE_DITHER "2*8"
333 #define Y_COEFF "3*8"
334 #define VR_COEFF "4*8"
335 #define UB_COEFF "5*8"
336 #define VG_COEFF "6*8"
337 #define UG_COEFF "7*8"
338 #define Y_OFFSET "8*8"
339 #define U_OFFSET "9*8"
340 #define V_OFFSET "10*8"
341 #define LUM_MMX_FILTER_OFFSET "11*8"
342 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
343 #define DSTW_OFFSET "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
344 #define ESP_OFFSET "11*8+4*4*256*2+8"
345 #define VROUNDER_OFFSET "11*8+4*4*256*2+16"
346 #define U_TEMP "11*8+4*4*256*2+24"
347 #define V_TEMP "11*8+4*4*256*2+32"
348 #define Y_TEMP "11*8+4*4*256*2+40"
349 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
350 #define UV_OFF_PX "11*8+4*4*256*3+48"
351 #define UV_OFF_BYTE "11*8+4*4*256*3+56"
352 #define DITHER16 "11*8+4*4*256*3+64"
353 #define DITHER32 "11*8+4*4*256*3+80"
355 DECLARE_ALIGNED(8, uint64_t, redDither);
356 DECLARE_ALIGNED(8, uint64_t, greenDither);
357 DECLARE_ALIGNED(8, uint64_t, blueDither);
359 DECLARE_ALIGNED(8, uint64_t, yCoeff);
360 DECLARE_ALIGNED(8, uint64_t, vrCoeff);
361 DECLARE_ALIGNED(8, uint64_t, ubCoeff);
362 DECLARE_ALIGNED(8, uint64_t, vgCoeff);
363 DECLARE_ALIGNED(8, uint64_t, ugCoeff);
364 DECLARE_ALIGNED(8, uint64_t, yOffset);
365 DECLARE_ALIGNED(8, uint64_t, uOffset);
366 DECLARE_ALIGNED(8, uint64_t, vOffset);
367 int32_t lumMmxFilter[4*MAX_FILTER_SIZE];
368 int32_t chrMmxFilter[4*MAX_FILTER_SIZE];
369 int dstW; ///< Width of destination luma/alpha planes.
370 DECLARE_ALIGNED(8, uint64_t, esp);
371 DECLARE_ALIGNED(8, uint64_t, vRounder);
372 DECLARE_ALIGNED(8, uint64_t, u_temp);
373 DECLARE_ALIGNED(8, uint64_t, v_temp);
374 DECLARE_ALIGNED(8, uint64_t, y_temp);
375 int32_t alpMmxFilter[4*MAX_FILTER_SIZE];
376 // alignment of these values is not necessary, but merely here
377 // to maintain the same offset across x8632 and x86-64. Once we
378 // use proper offset macros in the asm, they can be removed.
379 DECLARE_ALIGNED(8, ptrdiff_t, uv_off_px); ///< offset (in pixels) between u and v planes
380 DECLARE_ALIGNED(8, ptrdiff_t, uv_off_byte); ///< offset (in bytes) between u and v planes
381 DECLARE_ALIGNED(8, uint16_t, dither16)[8];
382 DECLARE_ALIGNED(8, uint32_t, dither32)[8];
384 const uint8_t *chrDither8, *lumDither8;
387 vector signed short CY;
388 vector signed short CRV;
389 vector signed short CBU;
390 vector signed short CGU;
391 vector signed short CGV;
392 vector signed short OY;
393 vector unsigned short CSHIFT;
394 vector signed short *vYCoeffsBank, *vCCoeffsBank;
398 DECLARE_ALIGNED(4, uint32_t, oy);
399 DECLARE_ALIGNED(4, uint32_t, oc);
400 DECLARE_ALIGNED(4, uint32_t, zero);
401 DECLARE_ALIGNED(4, uint32_t, cy);
402 DECLARE_ALIGNED(4, uint32_t, crv);
403 DECLARE_ALIGNED(4, uint32_t, rmask);
404 DECLARE_ALIGNED(4, uint32_t, cbu);
405 DECLARE_ALIGNED(4, uint32_t, bmask);
406 DECLARE_ALIGNED(4, uint32_t, cgu);
407 DECLARE_ALIGNED(4, uint32_t, cgv);
408 DECLARE_ALIGNED(4, uint32_t, gmask);
412 DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10];
415 /* function pointers for swScale() */
416 yuv2planar1_fn yuv2plane1;
417 yuv2planarX_fn yuv2planeX;
418 yuv2interleavedX_fn yuv2nv12cX;
419 yuv2packed1_fn yuv2packed1;
420 yuv2packed2_fn yuv2packed2;
421 yuv2packedX_fn yuv2packedX;
423 void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
424 int width, uint32_t *pal); ///< Unscaled conversion of luma plane to YV12 for horizontal scaler.
425 void (*alpToYV12)(uint8_t *dst, const uint8_t *src,
426 int width, uint32_t *pal); ///< Unscaled conversion of alpha plane to YV12 for horizontal scaler.
427 void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
428 const uint8_t *src1, const uint8_t *src2,
429 int width, uint32_t *pal); ///< Unscaled conversion of chroma planes to YV12 for horizontal scaler.
432 * Functions to read planar input, such as planar RGB, and convert
433 * internally to Y/UV.
436 void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width);
437 void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width);
441 * Scale one horizontal line of input data using a bilinear filter
442 * to produce one line of output data. Compared to SwsContext->hScale(),
443 * please take note of the following caveats when using these:
444 * - Scaling is done using only 7bit instead of 14bit coefficients.
445 * - You can use no more than 5 input pixels to produce 4 output
446 * pixels. Therefore, this filter should not be used for downscaling
447 * by more than ~20% in width (because that equals more than 5/4th
448 * downscaling and thus more than 5 pixels input per 4 pixels output).
449 * - In general, bilinear filters create artifacts during downscaling
450 * (even when <20%), because one output pixel will span more than one
451 * input pixel, and thus some pixels will need edges of both neighbor
452 * pixels to interpolate the output pixel. Since you can use at most
453 * two input pixels per output pixel in bilinear scaling, this is
454 * impossible and thus downscaling by any size will create artifacts.
455 * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
456 * in SwsContext->flags.
459 void (*hyscale_fast)(struct SwsContext *c,
460 int16_t *dst, int dstWidth,
461 const uint8_t *src, int srcW, int xInc);
462 void (*hcscale_fast)(struct SwsContext *c,
463 int16_t *dst1, int16_t *dst2, int dstWidth,
464 const uint8_t *src1, const uint8_t *src2,
469 * Scale one horizontal line of input data using a filter over the input
470 * lines, to produce one (differently sized) line of output data.
472 * @param dst pointer to destination buffer for horizontally scaled
473 * data. If the number of bits per component of one
474 * destination pixel (SwsContext->dstBpc) is <= 10, data
475 * will be 15bpc in 16bits (int16_t) width. Else (i.e.
476 * SwsContext->dstBpc == 16), data will be 19bpc in
477 * 32bits (int32_t) width.
478 * @param dstW width of destination image
479 * @param src pointer to source data to be scaled. If the number of
480 * bits per component of a source pixel (SwsContext->srcBpc)
481 * is 8, this is 8bpc in 8bits (uint8_t) width. Else
482 * (i.e. SwsContext->dstBpc > 8), this is native depth
483 * in 16bits (uint16_t) width. In other words, for 9-bit
484 * YUV input, this is 9bpc, for 10-bit YUV input, this is
485 * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
486 * @param filter filter coefficients to be used per output pixel for
487 * scaling. This contains 14bpp filtering coefficients.
488 * Guaranteed to contain dstW * filterSize entries.
489 * @param filterPos position of the first input pixel to be used for
490 * each output pixel during scaling. Guaranteed to
491 * contain dstW entries.
492 * @param filterSize the number of input coefficients to be used (and
493 * thus the number of input pixels to be used) for
494 * creating a single output pixel. Is aligned to 4
495 * (and input coefficients thus padded with zeroes)
496 * to simplify creating SIMD code.
499 void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src,
500 const int16_t *filter, const int16_t *filterPos,
502 void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src,
503 const int16_t *filter, const int16_t *filterPos,
507 void (*lumConvertRange)(int16_t *dst, int width); ///< Color range conversion function for luma plane if needed.
508 void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width); ///< Color range conversion function for chroma planes if needed.
510 int needs_hcscale; ///< Set if there are chroma planes to be converted.
513 //FIXME check init (where 0)
515 SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
516 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
517 int fullRange, int brightness,
518 int contrast, int saturation);
520 void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
521 int brightness, int contrast, int saturation);
522 void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
523 int lastInLumBuf, int lastInChrBuf);
525 SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c);
526 SwsFunc ff_yuv2rgb_init_vis(SwsContext *c);
527 SwsFunc ff_yuv2rgb_init_mlib(SwsContext *c);
528 SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c);
529 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c);
530 void ff_bfin_get_unscaled_swscale(SwsContext *c);
532 const char *sws_format_name(enum PixelFormat format);
535 (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 15)
537 #define is9_OR_10BPS(x) \
538 (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 8 || \
539 av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 9)
542 (av_pix_fmt_descriptors[x].flags & PIX_FMT_BE)
545 (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB) && \
546 av_pix_fmt_descriptors[x].nb_components >= 2)
548 #define isPlanarYUV(x) \
549 ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR) && \
553 (av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB)
557 (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) && \
558 av_pix_fmt_descriptors[x].nb_components <= 2)
560 #define isGray(x) ( \
562 || (x)==PIX_FMT_Y400A \
563 || (x)==PIX_FMT_GRAY16BE \
564 || (x)==PIX_FMT_GRAY16LE \
568 #define isRGBinInt(x) ( \
569 (x)==PIX_FMT_RGB48BE \
570 || (x)==PIX_FMT_RGB48LE \
571 || (x)==PIX_FMT_RGB32 \
572 || (x)==PIX_FMT_RGB32_1 \
573 || (x)==PIX_FMT_RGB24 \
574 || (x)==PIX_FMT_RGB565BE \
575 || (x)==PIX_FMT_RGB565LE \
576 || (x)==PIX_FMT_RGB555BE \
577 || (x)==PIX_FMT_RGB555LE \
578 || (x)==PIX_FMT_RGB444BE \
579 || (x)==PIX_FMT_RGB444LE \
580 || (x)==PIX_FMT_RGB8 \
581 || (x)==PIX_FMT_RGB4 \
582 || (x)==PIX_FMT_RGB4_BYTE \
583 || (x)==PIX_FMT_MONOBLACK \
584 || (x)==PIX_FMT_MONOWHITE \
586 #define isBGRinInt(x) ( \
587 (x)==PIX_FMT_BGR48BE \
588 || (x)==PIX_FMT_BGR48LE \
589 || (x)==PIX_FMT_BGR32 \
590 || (x)==PIX_FMT_BGR32_1 \
591 || (x)==PIX_FMT_BGR24 \
592 || (x)==PIX_FMT_BGR565BE \
593 || (x)==PIX_FMT_BGR565LE \
594 || (x)==PIX_FMT_BGR555BE \
595 || (x)==PIX_FMT_BGR555LE \
596 || (x)==PIX_FMT_BGR444BE \
597 || (x)==PIX_FMT_BGR444LE \
598 || (x)==PIX_FMT_BGR8 \
599 || (x)==PIX_FMT_BGR4 \
600 || (x)==PIX_FMT_BGR4_BYTE \
601 || (x)==PIX_FMT_MONOBLACK \
602 || (x)==PIX_FMT_MONOWHITE \
604 #define isAnyRGB(x) ( \
609 (av_pix_fmt_descriptors[x].nb_components == 2 || \
610 av_pix_fmt_descriptors[x].nb_components == 4)
612 #define isPacked(x) \
613 (av_pix_fmt_descriptors[x].nb_components >= 2 && \
614 !(av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR))
616 #define isPlanar(x) \
617 (av_pix_fmt_descriptors[x].nb_components >= 2 && \
618 (av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR))
620 #define usePal(x) ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) || (x) == PIX_FMT_Y400A)
622 extern const uint64_t ff_dither4[2];
623 extern const uint64_t ff_dither8[2];
625 extern const AVClass sws_context_class;
628 * Set c->swScale to an unscaled converter if one exists for the specific
629 * source and destination formats, bit depths, flags, etc.
631 void ff_get_unscaled_swscale(SwsContext *c);
633 void ff_swscale_get_unscaled_altivec(SwsContext *c);
636 * Return function pointer to fastest main scaler path function depending
637 * on architecture and available optimizations.
639 SwsFunc ff_getSwsFunc(SwsContext *c);
641 void ff_sws_init_swScale_altivec(SwsContext *c);
642 void ff_sws_init_swScale_mmx(SwsContext *c);
644 #endif /* SWSCALE_SWSCALE_INTERNAL_H */