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[]);
64 * Write one line of horizontally scaled data to planar output
65 * without any additional vertical scaling (or point-scaling).
67 * @param src scaled source data, 15bit for 8-10bit output,
68 * 19-bit for 16bit output (in int32_t)
69 * @param dest pointer to the output plane. For >8bit
70 * output, this is in uint16_t
71 * @param dstW width of destination in pixels
72 * @param dither ordered dither array of type int16_t and size 8
73 * @param offset Dither offset
75 typedef void (*yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW,
76 const uint8_t *dither, int offset);
79 * Write one line of horizontally scaled data to planar output
80 * with multi-point vertical scaling between input pixels.
82 * @param filter vertical luma/alpha scaling coefficients, 12bit [0,4096]
83 * @param src scaled luma (Y) or alpha (A) source data, 15bit for 8-10bit output,
84 * 19-bit for 16bit output (in int32_t)
85 * @param filterSize number of vertical input lines to scale
86 * @param dest pointer to output plane. For >8bit
87 * output, this is in uint16_t
88 * @param dstW width of destination pixels
89 * @param offset Dither offset
91 typedef void (*yuv2planarX_fn)(const int16_t *filter, int filterSize,
92 const int16_t **src, uint8_t *dest, int dstW,
93 const uint8_t *dither, int offset);
96 * Write one line of horizontally scaled chroma to interleaved output
97 * with multi-point vertical scaling between input pixels.
99 * @param c SWS scaling context
100 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
101 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
102 * 19-bit for 16bit output (in int32_t)
103 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
104 * 19-bit for 16bit output (in int32_t)
105 * @param chrFilterSize number of vertical chroma input lines to scale
106 * @param dest pointer to the output plane. For >8bit
107 * output, this is in uint16_t
108 * @param dstW width of chroma planes
110 typedef void (*yuv2interleavedX_fn)(struct SwsContext *c,
111 const int16_t *chrFilter,
113 const int16_t **chrUSrc,
114 const int16_t **chrVSrc,
115 uint8_t *dest, int dstW);
118 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
119 * output without any additional vertical scaling (or point-scaling). Note
120 * that this function may do chroma scaling, see the "uvalpha" argument.
122 * @param c SWS scaling context
123 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
124 * 19-bit for 16bit output (in int32_t)
125 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
126 * 19-bit for 16bit output (in int32_t)
127 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
128 * 19-bit for 16bit output (in int32_t)
129 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
130 * 19-bit for 16bit output (in int32_t)
131 * @param dest pointer to the output plane. For 16bit output, this is
133 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
134 * to write into dest[]
135 * @param uvalpha chroma scaling coefficient for the second line of chroma
136 * pixels, either 2048 or 0. If 0, one chroma input is used
137 * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
138 * is set, it generates 1 output pixel). If 2048, two chroma
139 * input pixels should be averaged for 2 output pixels (this
140 * only happens if SWS_FLAG_FULL_CHR_INT is not set)
141 * @param y vertical line number for this output. This does not need
142 * to be used to calculate the offset in the destination,
143 * but can be used to generate comfort noise using dithering
144 * for some output formats.
146 typedef void (*yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc,
147 const int16_t *chrUSrc[2],
148 const int16_t *chrVSrc[2],
149 const int16_t *alpSrc, uint8_t *dest,
150 int dstW, int uvalpha, int y);
152 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
153 * output by doing bilinear scaling between two input lines.
155 * @param c SWS scaling context
156 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
157 * 19-bit for 16bit output (in int32_t)
158 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
159 * 19-bit for 16bit output (in int32_t)
160 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
161 * 19-bit for 16bit output (in int32_t)
162 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
163 * 19-bit for 16bit output (in int32_t)
164 * @param dest pointer to the output plane. For 16bit output, this is
166 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
167 * to write into dest[]
168 * @param yalpha luma/alpha scaling coefficients for the second input line.
169 * The first line's coefficients can be calculated by using
171 * @param uvalpha chroma scaling coefficient for the second input line. The
172 * first line's coefficients can be calculated by using
174 * @param y vertical line number for this output. This does not need
175 * to be used to calculate the offset in the destination,
176 * but can be used to generate comfort noise using dithering
177 * for some output formats.
179 typedef void (*yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2],
180 const int16_t *chrUSrc[2],
181 const int16_t *chrVSrc[2],
182 const int16_t *alpSrc[2],
184 int dstW, int yalpha, int uvalpha, int y);
186 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
187 * output by doing multi-point vertical scaling between input pixels.
189 * @param c SWS scaling context
190 * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
191 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
192 * 19-bit for 16bit output (in int32_t)
193 * @param lumFilterSize number of vertical luma/alpha input lines to scale
194 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
195 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
196 * 19-bit for 16bit output (in int32_t)
197 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
198 * 19-bit for 16bit output (in int32_t)
199 * @param chrFilterSize number of vertical chroma input lines to scale
200 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
201 * 19-bit for 16bit output (in int32_t)
202 * @param dest pointer to the output plane. For 16bit output, this is
204 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
205 * to write into dest[]
206 * @param y vertical line number for this output. This does not need
207 * to be used to calculate the offset in the destination,
208 * but can be used to generate comfort noise using dithering
209 * or some output formats.
211 typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
212 const int16_t **lumSrc, int lumFilterSize,
213 const int16_t *chrFilter,
214 const int16_t **chrUSrc,
215 const int16_t **chrVSrc, int chrFilterSize,
216 const int16_t **alpSrc, uint8_t *dest,
219 /* This struct should be aligned on at least a 32-byte boundary. */
220 typedef struct SwsContext {
222 * info on struct for av_log
224 const AVClass *av_class;
227 * Note that src, dst, srcStride, dstStride will be copied in the
228 * sws_scale() wrapper so they can be freely modified here.
231 int srcW; ///< Width of source luma/alpha planes.
232 int srcH; ///< Height of source luma/alpha planes.
233 int dstH; ///< Height of destination luma/alpha planes.
234 int chrSrcW; ///< Width of source chroma planes.
235 int chrSrcH; ///< Height of source chroma planes.
236 int chrDstW; ///< Width of destination chroma planes.
237 int chrDstH; ///< Height of destination chroma planes.
238 int lumXInc, chrXInc;
239 int lumYInc, chrYInc;
240 enum PixelFormat dstFormat; ///< Destination pixel format.
241 enum PixelFormat srcFormat; ///< Source pixel format.
242 int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
243 int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
245 int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
246 int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
247 int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
248 int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
249 int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
250 int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
251 double param[2]; ///< Input parameters for scaling algorithms that need them.
253 uint32_t pal_yuv[256];
254 uint32_t pal_rgb[256];
257 * @name Scaled horizontal lines ring buffer.
258 * The horizontal scaler keeps just enough scaled lines in a ring buffer
259 * so they may be passed to the vertical scaler. The pointers to the
260 * allocated buffers for each line are duplicated in sequence in the ring
261 * buffer to simplify indexing and avoid wrapping around between lines
262 * inside the vertical scaler code. The wrapping is done before the
263 * vertical scaler is called.
266 int16_t **lumPixBuf; ///< Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.
267 int16_t **chrUPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
268 int16_t **chrVPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
269 int16_t **alpPixBuf; ///< Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.
270 int vLumBufSize; ///< Number of vertical luma/alpha lines allocated in the ring buffer.
271 int vChrBufSize; ///< Number of vertical chroma lines allocated in the ring buffer.
272 int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
273 int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
274 int lumBufIndex; ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
275 int chrBufIndex; ///< Index in ring buffer of the last scaled horizontal chroma line from source.
278 uint8_t *formatConvBuffer;
281 * @name Horizontal and vertical filters.
282 * To better understand the following fields, here is a pseudo-code of
283 * their usage in filtering a horizontal line:
285 * for (i = 0; i < width; i++) {
287 * for (j = 0; j < filterSize; j++)
288 * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
289 * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
294 int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
295 int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
296 int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
297 int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
298 int16_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
299 int16_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
300 int16_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
301 int16_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
302 int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
303 int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
304 int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
305 int vChrFilterSize; ///< Vertical filter size for chroma pixels.
308 int lumMmx2FilterCodeSize; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.
309 int chrMmx2FilterCodeSize; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma planes.
310 uint8_t *lumMmx2FilterCode; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.
311 uint8_t *chrMmx2FilterCode; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma planes.
315 int dstY; ///< Last destination vertical line output from last slice.
316 int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
317 void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
318 uint8_t *table_rV[256];
319 uint8_t *table_gU[256];
321 uint8_t *table_bU[256];
324 int contrast, brightness, saturation; // for sws_getColorspaceDetails
325 int srcColorspaceTable[4];
326 int dstColorspaceTable[4];
327 int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
328 int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
329 int yuv2rgb_y_offset;
331 int yuv2rgb_v2r_coeff;
332 int yuv2rgb_v2g_coeff;
333 int yuv2rgb_u2g_coeff;
334 int yuv2rgb_u2b_coeff;
336 #define RED_DITHER "0*8"
337 #define GREEN_DITHER "1*8"
338 #define BLUE_DITHER "2*8"
339 #define Y_COEFF "3*8"
340 #define VR_COEFF "4*8"
341 #define UB_COEFF "5*8"
342 #define VG_COEFF "6*8"
343 #define UG_COEFF "7*8"
344 #define Y_OFFSET "8*8"
345 #define U_OFFSET "9*8"
346 #define V_OFFSET "10*8"
347 #define LUM_MMX_FILTER_OFFSET "11*8"
348 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
349 #define DSTW_OFFSET "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
350 #define ESP_OFFSET "11*8+4*4*256*2+8"
351 #define VROUNDER_OFFSET "11*8+4*4*256*2+16"
352 #define U_TEMP "11*8+4*4*256*2+24"
353 #define V_TEMP "11*8+4*4*256*2+32"
354 #define Y_TEMP "11*8+4*4*256*2+40"
355 #define UV_OFF_PX "11*8+4*4*256*2+48"
356 #define UV_OFF_BYTE "11*8+4*4*256*2+56"
357 #define DITHER16 "11*8+4*4*256*2+64"
358 #define DITHER32 "11*8+4*4*256*2+80"
360 DECLARE_ALIGNED(8, uint64_t, redDither);
361 DECLARE_ALIGNED(8, uint64_t, greenDither);
362 DECLARE_ALIGNED(8, uint64_t, blueDither);
364 DECLARE_ALIGNED(8, uint64_t, yCoeff);
365 DECLARE_ALIGNED(8, uint64_t, vrCoeff);
366 DECLARE_ALIGNED(8, uint64_t, ubCoeff);
367 DECLARE_ALIGNED(8, uint64_t, vgCoeff);
368 DECLARE_ALIGNED(8, uint64_t, ugCoeff);
369 DECLARE_ALIGNED(8, uint64_t, yOffset);
370 DECLARE_ALIGNED(8, uint64_t, uOffset);
371 DECLARE_ALIGNED(8, uint64_t, vOffset);
372 int32_t lumMmxFilter[4 * MAX_FILTER_SIZE];
373 int32_t chrMmxFilter[4 * MAX_FILTER_SIZE];
374 int dstW; ///< Width of destination luma/alpha planes.
375 DECLARE_ALIGNED(8, uint64_t, esp);
376 DECLARE_ALIGNED(8, uint64_t, vRounder);
377 DECLARE_ALIGNED(8, uint64_t, u_temp);
378 DECLARE_ALIGNED(8, uint64_t, v_temp);
379 DECLARE_ALIGNED(8, uint64_t, y_temp);
380 // alignment of these values is not necessary, but merely here
381 // to maintain the same offset across x8632 and x86-64. Once we
382 // use proper offset macros in the asm, they can be removed.
383 DECLARE_ALIGNED(8, ptrdiff_t, uv_off_px); ///< offset (in pixels) between u and v planes
384 DECLARE_ALIGNED(8, ptrdiff_t, uv_off_byte); ///< offset (in bytes) between u and v planes
385 DECLARE_ALIGNED(8, uint16_t, dither16)[8];
386 DECLARE_ALIGNED(8, uint32_t, dither32)[8];
388 const uint8_t *chrDither8, *lumDither8;
391 vector signed short CY;
392 vector signed short CRV;
393 vector signed short CBU;
394 vector signed short CGU;
395 vector signed short CGV;
396 vector signed short OY;
397 vector unsigned short CSHIFT;
398 vector signed short *vYCoeffsBank, *vCCoeffsBank;
402 DECLARE_ALIGNED(4, uint32_t, oy);
403 DECLARE_ALIGNED(4, uint32_t, oc);
404 DECLARE_ALIGNED(4, uint32_t, zero);
405 DECLARE_ALIGNED(4, uint32_t, cy);
406 DECLARE_ALIGNED(4, uint32_t, crv);
407 DECLARE_ALIGNED(4, uint32_t, rmask);
408 DECLARE_ALIGNED(4, uint32_t, cbu);
409 DECLARE_ALIGNED(4, uint32_t, bmask);
410 DECLARE_ALIGNED(4, uint32_t, cgu);
411 DECLARE_ALIGNED(4, uint32_t, cgv);
412 DECLARE_ALIGNED(4, uint32_t, gmask);
416 DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10];
419 /* function pointers for swScale() */
420 yuv2planar1_fn yuv2plane1;
421 yuv2planarX_fn yuv2planeX;
422 yuv2interleavedX_fn yuv2nv12cX;
423 yuv2packed1_fn yuv2packed1;
424 yuv2packed2_fn yuv2packed2;
425 yuv2packedX_fn yuv2packedX;
427 /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
428 void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
429 int width, uint32_t *pal);
430 /// Unscaled conversion of alpha plane to YV12 for horizontal scaler.
431 void (*alpToYV12)(uint8_t *dst, const uint8_t *src,
432 int width, uint32_t *pal);
433 /// Unscaled conversion of chroma planes to YV12 for horizontal scaler.
434 void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
435 const uint8_t *src1, const uint8_t *src2,
436 int width, uint32_t *pal);
439 * Functions to read planar input, such as planar RGB, and convert
440 * internally to Y/UV.
443 void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width);
444 void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4],
449 * Scale one horizontal line of input data using a bilinear filter
450 * to produce one line of output data. Compared to SwsContext->hScale(),
451 * please take note of the following caveats when using these:
452 * - Scaling is done using only 7bit instead of 14bit coefficients.
453 * - You can use no more than 5 input pixels to produce 4 output
454 * pixels. Therefore, this filter should not be used for downscaling
455 * by more than ~20% in width (because that equals more than 5/4th
456 * downscaling and thus more than 5 pixels input per 4 pixels output).
457 * - In general, bilinear filters create artifacts during downscaling
458 * (even when <20%), because one output pixel will span more than one
459 * input pixel, and thus some pixels will need edges of both neighbor
460 * pixels to interpolate the output pixel. Since you can use at most
461 * two input pixels per output pixel in bilinear scaling, this is
462 * impossible and thus downscaling by any size will create artifacts.
463 * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
464 * in SwsContext->flags.
467 void (*hyscale_fast)(struct SwsContext *c,
468 int16_t *dst, int dstWidth,
469 const uint8_t *src, int srcW, int xInc);
470 void (*hcscale_fast)(struct SwsContext *c,
471 int16_t *dst1, int16_t *dst2, int dstWidth,
472 const uint8_t *src1, const uint8_t *src2,
477 * Scale one horizontal line of input data using a filter over the input
478 * lines, to produce one (differently sized) line of output data.
480 * @param dst pointer to destination buffer for horizontally scaled
481 * data. If the number of bits per component of one
482 * destination pixel (SwsContext->dstBpc) is <= 10, data
483 * will be 15bpc in 16bits (int16_t) width. Else (i.e.
484 * SwsContext->dstBpc == 16), data will be 19bpc in
485 * 32bits (int32_t) width.
486 * @param dstW width of destination image
487 * @param src pointer to source data to be scaled. If the number of
488 * bits per component of a source pixel (SwsContext->srcBpc)
489 * is 8, this is 8bpc in 8bits (uint8_t) width. Else
490 * (i.e. SwsContext->dstBpc > 8), this is native depth
491 * in 16bits (uint16_t) width. In other words, for 9-bit
492 * YUV input, this is 9bpc, for 10-bit YUV input, this is
493 * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
494 * @param filter filter coefficients to be used per output pixel for
495 * scaling. This contains 14bpp filtering coefficients.
496 * Guaranteed to contain dstW * filterSize entries.
497 * @param filterPos position of the first input pixel to be used for
498 * each output pixel during scaling. Guaranteed to
499 * contain dstW entries.
500 * @param filterSize the number of input coefficients to be used (and
501 * thus the number of input pixels to be used) for
502 * creating a single output pixel. Is aligned to 4
503 * (and input coefficients thus padded with zeroes)
504 * to simplify creating SIMD code.
507 void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
508 const uint8_t *src, const int16_t *filter,
509 const int16_t *filterPos, int filterSize);
510 void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
511 const uint8_t *src, const int16_t *filter,
512 const int16_t *filterPos, int filterSize);
515 /// Color range conversion function for luma plane if needed.
516 void (*lumConvertRange)(int16_t *dst, int width);
517 /// Color range conversion function for chroma planes if needed.
518 void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width);
520 int needs_hcscale; ///< Set if there are chroma planes to be converted.
522 //FIXME check init (where 0)
524 SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
525 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
526 int fullRange, int brightness,
527 int contrast, int saturation);
529 void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
530 int brightness, int contrast, int saturation);
531 void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
532 int lastInLumBuf, int lastInChrBuf);
534 SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c);
535 SwsFunc ff_yuv2rgb_init_vis(SwsContext *c);
536 SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c);
537 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c);
538 void ff_bfin_get_unscaled_swscale(SwsContext *c);
540 const char *sws_format_name(enum PixelFormat format);
543 (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 15)
545 #define is9_OR_10BPS(x) \
546 (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 8 || \
547 av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 9)
550 (av_pix_fmt_descriptors[x].flags & PIX_FMT_BE)
553 (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB) && \
554 av_pix_fmt_descriptors[x].nb_components >= 2)
556 #define isPlanarYUV(x) \
557 ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR) && \
561 (av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB)
565 (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) && \
566 av_pix_fmt_descriptors[x].nb_components <= 2)
569 ((x) == PIX_FMT_GRAY8 || \
570 (x) == PIX_FMT_Y400A || \
571 (x) == PIX_FMT_GRAY16BE || \
572 (x) == PIX_FMT_GRAY16LE)
575 #define isRGBinInt(x) \
576 ((x) == PIX_FMT_RGB48BE || \
577 (x) == PIX_FMT_RGB48LE || \
578 (x) == PIX_FMT_RGB32 || \
579 (x) == PIX_FMT_RGB32_1 || \
580 (x) == PIX_FMT_RGB24 || \
581 (x) == PIX_FMT_RGB565BE || \
582 (x) == PIX_FMT_RGB565LE || \
583 (x) == PIX_FMT_RGB555BE || \
584 (x) == PIX_FMT_RGB555LE || \
585 (x) == PIX_FMT_RGB444BE || \
586 (x) == PIX_FMT_RGB444LE || \
587 (x) == PIX_FMT_RGB8 || \
588 (x) == PIX_FMT_RGB4 || \
589 (x) == PIX_FMT_RGB4_BYTE || \
590 (x) == PIX_FMT_MONOBLACK || \
591 (x) == PIX_FMT_MONOWHITE)
593 #define isBGRinInt(x) \
594 ((x) == PIX_FMT_BGR48BE || \
595 (x) == PIX_FMT_BGR48LE || \
596 (x) == PIX_FMT_BGR32 || \
597 (x) == PIX_FMT_BGR32_1 || \
598 (x) == PIX_FMT_BGR24 || \
599 (x) == PIX_FMT_BGR565BE || \
600 (x) == PIX_FMT_BGR565LE || \
601 (x) == PIX_FMT_BGR555BE || \
602 (x) == PIX_FMT_BGR555LE || \
603 (x) == PIX_FMT_BGR444BE || \
604 (x) == PIX_FMT_BGR444LE || \
605 (x) == PIX_FMT_BGR8 || \
606 (x) == PIX_FMT_BGR4 || \
607 (x) == PIX_FMT_BGR4_BYTE || \
608 (x) == PIX_FMT_MONOBLACK || \
609 (x) == PIX_FMT_MONOWHITE)
611 #define isAnyRGB(x) \
616 (av_pix_fmt_descriptors[x].nb_components == 2 || \
617 av_pix_fmt_descriptors[x].nb_components == 4)
619 #define isPacked(x) \
620 ((av_pix_fmt_descriptors[x].nb_components >= 2 && \
621 !(av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR)) || \
624 #define isPlanar(x) \
625 (av_pix_fmt_descriptors[x].nb_components >= 2 && \
626 (av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR))
628 #define usePal(x) ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) || \
629 (av_pix_fmt_descriptors[x].flags & PIX_FMT_PSEUDOPAL) || \
630 (x) == PIX_FMT_Y400A)
632 extern const uint64_t ff_dither4[2];
633 extern const uint64_t ff_dither8[2];
635 extern const AVClass sws_context_class;
638 * Set c->swScale to an unscaled converter if one exists for the specific
639 * source and destination formats, bit depths, flags, etc.
641 void ff_get_unscaled_swscale(SwsContext *c);
643 void ff_swscale_get_unscaled_altivec(SwsContext *c);
646 * Return function pointer to fastest main scaler path function depending
647 * on architecture and available optimizations.
649 SwsFunc ff_getSwsFunc(SwsContext *c);
651 void ff_sws_init_input_funcs(SwsContext *c);
652 void ff_sws_init_output_funcs(SwsContext *c,
653 yuv2planar1_fn *yuv2plane1,
654 yuv2planarX_fn *yuv2planeX,
655 yuv2interleavedX_fn *yuv2nv12cX,
656 yuv2packed1_fn *yuv2packed1,
657 yuv2packed2_fn *yuv2packed2,
658 yuv2packedX_fn *yuv2packedX);
659 void ff_sws_init_swScale_altivec(SwsContext *c);
660 void ff_sws_init_swScale_mmx(SwsContext *c);
662 #endif /* SWSCALE_SWSCALE_INTERNAL_H */