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/common.h"
32 #include "libavutil/log.h"
33 #include "libavutil/pixfmt.h"
34 #include "libavutil/pixdesc.h"
36 #define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
38 #define FAST_BGR2YV12 // use 7-bit instead of 15-bit coefficients
40 #define MAX_FILTER_SIZE 256
43 #define ALT32_CORR (-1)
60 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[],
61 int srcStride[], int srcSliceY, int srcSliceH,
62 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,
112 const int16_t *chrFilter,
114 const int16_t **chrUSrc,
115 const int16_t **chrVSrc,
116 uint8_t *dest, int dstW);
119 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
120 * output without any additional vertical scaling (or point-scaling). Note
121 * that this function may do chroma scaling, see the "uvalpha" argument.
123 * @param c SWS scaling context
124 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
125 * 19-bit for 16bit output (in int32_t)
126 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
127 * 19-bit for 16bit output (in int32_t)
128 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
129 * 19-bit for 16bit output (in int32_t)
130 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
131 * 19-bit for 16bit output (in int32_t)
132 * @param dest pointer to the output plane. For 16bit output, this is
134 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
135 * to write into dest[]
136 * @param uvalpha chroma scaling coefficient for the second line of chroma
137 * pixels, either 2048 or 0. If 0, one chroma input is used
138 * for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
139 * is set, it generates 1 output pixel). If 2048, two chroma
140 * input pixels should be averaged for 2 output pixels (this
141 * only happens if SWS_FLAG_FULL_CHR_INT is not set)
142 * @param y vertical line number for this output. This does not need
143 * to be used to calculate the offset in the destination,
144 * but can be used to generate comfort noise using dithering
145 * for some output formats.
147 typedef void (*yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc,
148 const int16_t *chrUSrc[2],
149 const int16_t *chrVSrc[2],
150 const int16_t *alpSrc, uint8_t *dest,
151 int dstW, int uvalpha, int y);
153 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
154 * output by doing bilinear scaling between two input lines.
156 * @param c SWS scaling context
157 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
158 * 19-bit for 16bit output (in int32_t)
159 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
160 * 19-bit for 16bit output (in int32_t)
161 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
162 * 19-bit for 16bit output (in int32_t)
163 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
164 * 19-bit for 16bit output (in int32_t)
165 * @param dest pointer to the output plane. For 16bit output, this is
167 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
168 * to write into dest[]
169 * @param yalpha luma/alpha scaling coefficients for the second input line.
170 * The first line's coefficients can be calculated by using
172 * @param uvalpha chroma scaling coefficient for the second input line. The
173 * first line's coefficients can be calculated by using
175 * @param y vertical line number for this output. This does not need
176 * to be used to calculate the offset in the destination,
177 * but can be used to generate comfort noise using dithering
178 * for some output formats.
180 typedef void (*yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2],
181 const int16_t *chrUSrc[2],
182 const int16_t *chrVSrc[2],
183 const int16_t *alpSrc[2],
185 int dstW, int yalpha, int uvalpha, int y);
187 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
188 * output by doing multi-point vertical scaling between input pixels.
190 * @param c SWS scaling context
191 * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
192 * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
193 * 19-bit for 16bit output (in int32_t)
194 * @param lumFilterSize number of vertical luma/alpha input lines to scale
195 * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
196 * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
197 * 19-bit for 16bit output (in int32_t)
198 * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
199 * 19-bit for 16bit output (in int32_t)
200 * @param chrFilterSize number of vertical chroma input lines to scale
201 * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
202 * 19-bit for 16bit output (in int32_t)
203 * @param dest pointer to the output plane. For 16bit output, this is
205 * @param dstW width of lumSrc and alpSrc in pixels, number of pixels
206 * to write into dest[]
207 * @param y vertical line number for this output. This does not need
208 * to be used to calculate the offset in the destination,
209 * but can be used to generate comfort noise using dithering
210 * or some output formats.
212 typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
213 const int16_t **lumSrc, int lumFilterSize,
214 const int16_t *chrFilter,
215 const int16_t **chrUSrc,
216 const int16_t **chrVSrc, int chrFilterSize,
217 const int16_t **alpSrc, uint8_t *dest,
220 /* This struct should be aligned on at least a 32-byte boundary. */
221 typedef struct SwsContext {
223 * info on struct for av_log
225 const AVClass *av_class;
228 * Note that src, dst, srcStride, dstStride will be copied in the
229 * sws_scale() wrapper so they can be freely modified here.
232 int srcW; ///< Width of source luma/alpha planes.
233 int srcH; ///< Height of source luma/alpha planes.
234 int dstH; ///< Height of destination luma/alpha planes.
235 int chrSrcW; ///< Width of source chroma planes.
236 int chrSrcH; ///< Height of source chroma planes.
237 int chrDstW; ///< Width of destination chroma planes.
238 int chrDstH; ///< Height of destination chroma planes.
239 int lumXInc, chrXInc;
240 int lumYInc, chrYInc;
241 enum PixelFormat dstFormat; ///< Destination pixel format.
242 enum PixelFormat srcFormat; ///< Source pixel format.
243 int dstFormatBpp; ///< Number of bits per pixel of the destination pixel format.
244 int srcFormatBpp; ///< Number of bits per pixel of the source pixel format.
246 int chrSrcHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
247 int chrSrcVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
248 int chrDstHSubSample; ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
249 int chrDstVSubSample; ///< Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
250 int vChrDrop; ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
251 int sliceDir; ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
252 double param[2]; ///< Input parameters for scaling algorithms that need them.
254 uint32_t pal_yuv[256];
255 uint32_t pal_rgb[256];
258 * @name Scaled horizontal lines ring buffer.
259 * The horizontal scaler keeps just enough scaled lines in a ring buffer
260 * so they may be passed to the vertical scaler. The pointers to the
261 * allocated buffers for each line are duplicated in sequence in the ring
262 * buffer to simplify indexing and avoid wrapping around between lines
263 * inside the vertical scaler code. The wrapping is done before the
264 * vertical scaler is called.
267 int16_t **lumPixBuf; ///< Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.
268 int16_t **chrUPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
269 int16_t **chrVPixBuf; ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
270 int16_t **alpPixBuf; ///< Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.
271 int vLumBufSize; ///< Number of vertical luma/alpha lines allocated in the ring buffer.
272 int vChrBufSize; ///< Number of vertical chroma lines allocated in the ring buffer.
273 int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
274 int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
275 int lumBufIndex; ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
276 int chrBufIndex; ///< Index in ring buffer of the last scaled horizontal chroma line from source.
279 uint8_t *formatConvBuffer;
282 * @name Horizontal and vertical filters.
283 * To better understand the following fields, here is a pseudo-code of
284 * their usage in filtering a horizontal line:
286 * for (i = 0; i < width; i++) {
288 * for (j = 0; j < filterSize; j++)
289 * dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
290 * dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
295 int16_t *hLumFilter; ///< Array of horizontal filter coefficients for luma/alpha planes.
296 int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
297 int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
298 int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
299 int32_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
300 int32_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
301 int32_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
302 int32_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
303 int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
304 int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
305 int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
306 int vChrFilterSize; ///< Vertical filter size for chroma pixels.
309 int lumMmx2FilterCodeSize; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.
310 int chrMmx2FilterCodeSize; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma planes.
311 uint8_t *lumMmx2FilterCode; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.
312 uint8_t *chrMmx2FilterCode; ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma planes.
316 int dstY; ///< Last destination vertical line output from last slice.
317 int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
318 void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
319 uint8_t *table_rV[256];
320 uint8_t *table_gU[256];
322 uint8_t *table_bU[256];
325 int contrast, brightness, saturation; // for sws_getColorspaceDetails
326 int srcColorspaceTable[4];
327 int dstColorspaceTable[4];
328 int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
329 int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
330 int yuv2rgb_y_offset;
332 int yuv2rgb_v2r_coeff;
333 int yuv2rgb_v2g_coeff;
334 int yuv2rgb_u2g_coeff;
335 int yuv2rgb_u2b_coeff;
337 #define RED_DITHER "0*8"
338 #define GREEN_DITHER "1*8"
339 #define BLUE_DITHER "2*8"
340 #define Y_COEFF "3*8"
341 #define VR_COEFF "4*8"
342 #define UB_COEFF "5*8"
343 #define VG_COEFF "6*8"
344 #define UG_COEFF "7*8"
345 #define Y_OFFSET "8*8"
346 #define U_OFFSET "9*8"
347 #define V_OFFSET "10*8"
348 #define LUM_MMX_FILTER_OFFSET "11*8"
349 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
350 #define DSTW_OFFSET "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
351 #define ESP_OFFSET "11*8+4*4*256*2+8"
352 #define VROUNDER_OFFSET "11*8+4*4*256*2+16"
353 #define U_TEMP "11*8+4*4*256*2+24"
354 #define V_TEMP "11*8+4*4*256*2+32"
355 #define Y_TEMP "11*8+4*4*256*2+40"
356 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
357 #define UV_OFF_PX "11*8+4*4*256*3+48"
358 #define UV_OFF_BYTE "11*8+4*4*256*3+56"
359 #define DITHER16 "11*8+4*4*256*3+64"
360 #define DITHER32 "11*8+4*4*256*3+80"
362 DECLARE_ALIGNED(8, uint64_t, redDither);
363 DECLARE_ALIGNED(8, uint64_t, greenDither);
364 DECLARE_ALIGNED(8, uint64_t, blueDither);
366 DECLARE_ALIGNED(8, uint64_t, yCoeff);
367 DECLARE_ALIGNED(8, uint64_t, vrCoeff);
368 DECLARE_ALIGNED(8, uint64_t, ubCoeff);
369 DECLARE_ALIGNED(8, uint64_t, vgCoeff);
370 DECLARE_ALIGNED(8, uint64_t, ugCoeff);
371 DECLARE_ALIGNED(8, uint64_t, yOffset);
372 DECLARE_ALIGNED(8, uint64_t, uOffset);
373 DECLARE_ALIGNED(8, uint64_t, vOffset);
374 int32_t lumMmxFilter[4 * MAX_FILTER_SIZE];
375 int32_t chrMmxFilter[4 * MAX_FILTER_SIZE];
376 int dstW; ///< Width of destination luma/alpha planes.
377 DECLARE_ALIGNED(8, uint64_t, esp);
378 DECLARE_ALIGNED(8, uint64_t, vRounder);
379 DECLARE_ALIGNED(8, uint64_t, u_temp);
380 DECLARE_ALIGNED(8, uint64_t, v_temp);
381 DECLARE_ALIGNED(8, uint64_t, y_temp);
382 int32_t alpMmxFilter[4 * MAX_FILTER_SIZE];
383 // alignment of these values is not necessary, but merely here
384 // to maintain the same offset across x8632 and x86-64. Once we
385 // use proper offset macros in the asm, they can be removed.
386 DECLARE_ALIGNED(8, ptrdiff_t, uv_off_px); ///< offset (in pixels) between u and v planes
387 DECLARE_ALIGNED(8, ptrdiff_t, uv_off_byte); ///< offset (in bytes) between u and v planes
388 DECLARE_ALIGNED(8, uint16_t, dither16)[8];
389 DECLARE_ALIGNED(8, uint32_t, dither32)[8];
391 const uint8_t *chrDither8, *lumDither8;
394 vector signed short CY;
395 vector signed short CRV;
396 vector signed short CBU;
397 vector signed short CGU;
398 vector signed short CGV;
399 vector signed short OY;
400 vector unsigned short CSHIFT;
401 vector signed short *vYCoeffsBank, *vCCoeffsBank;
405 DECLARE_ALIGNED(4, uint32_t, oy);
406 DECLARE_ALIGNED(4, uint32_t, oc);
407 DECLARE_ALIGNED(4, uint32_t, zero);
408 DECLARE_ALIGNED(4, uint32_t, cy);
409 DECLARE_ALIGNED(4, uint32_t, crv);
410 DECLARE_ALIGNED(4, uint32_t, rmask);
411 DECLARE_ALIGNED(4, uint32_t, cbu);
412 DECLARE_ALIGNED(4, uint32_t, bmask);
413 DECLARE_ALIGNED(4, uint32_t, cgu);
414 DECLARE_ALIGNED(4, uint32_t, cgv);
415 DECLARE_ALIGNED(4, uint32_t, gmask);
419 DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10];
422 /* function pointers for swScale() */
423 yuv2planar1_fn yuv2plane1;
424 yuv2planarX_fn yuv2planeX;
425 yuv2interleavedX_fn yuv2nv12cX;
426 yuv2packed1_fn yuv2packed1;
427 yuv2packed2_fn yuv2packed2;
428 yuv2packedX_fn yuv2packedX;
430 /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
431 void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
432 int width, uint32_t *pal);
433 /// Unscaled conversion of alpha plane to YV12 for horizontal scaler.
434 void (*alpToYV12)(uint8_t *dst, const uint8_t *src,
435 int width, uint32_t *pal);
436 /// Unscaled conversion of chroma planes to YV12 for horizontal scaler.
437 void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
438 const uint8_t *src1, const uint8_t *src2,
439 int width, uint32_t *pal);
442 * Functions to read planar input, such as planar RGB, and convert
443 * internally to Y/UV.
446 void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width);
447 void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4],
452 * Scale one horizontal line of input data using a bilinear filter
453 * to produce one line of output data. Compared to SwsContext->hScale(),
454 * please take note of the following caveats when using these:
455 * - Scaling is done using only 7bit instead of 14bit coefficients.
456 * - You can use no more than 5 input pixels to produce 4 output
457 * pixels. Therefore, this filter should not be used for downscaling
458 * by more than ~20% in width (because that equals more than 5/4th
459 * downscaling and thus more than 5 pixels input per 4 pixels output).
460 * - In general, bilinear filters create artifacts during downscaling
461 * (even when <20%), because one output pixel will span more than one
462 * input pixel, and thus some pixels will need edges of both neighbor
463 * pixels to interpolate the output pixel. Since you can use at most
464 * two input pixels per output pixel in bilinear scaling, this is
465 * impossible and thus downscaling by any size will create artifacts.
466 * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
467 * in SwsContext->flags.
470 void (*hyscale_fast)(struct SwsContext *c,
471 int16_t *dst, int dstWidth,
472 const uint8_t *src, int srcW, int xInc);
473 void (*hcscale_fast)(struct SwsContext *c,
474 int16_t *dst1, int16_t *dst2, int dstWidth,
475 const uint8_t *src1, const uint8_t *src2,
480 * Scale one horizontal line of input data using a filter over the input
481 * lines, to produce one (differently sized) line of output data.
483 * @param dst pointer to destination buffer for horizontally scaled
484 * data. If the number of bits per component of one
485 * destination pixel (SwsContext->dstBpc) is <= 10, data
486 * will be 15bpc in 16bits (int16_t) width. Else (i.e.
487 * SwsContext->dstBpc == 16), data will be 19bpc in
488 * 32bits (int32_t) width.
489 * @param dstW width of destination image
490 * @param src pointer to source data to be scaled. If the number of
491 * bits per component of a source pixel (SwsContext->srcBpc)
492 * is 8, this is 8bpc in 8bits (uint8_t) width. Else
493 * (i.e. SwsContext->dstBpc > 8), this is native depth
494 * in 16bits (uint16_t) width. In other words, for 9-bit
495 * YUV input, this is 9bpc, for 10-bit YUV input, this is
496 * 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
497 * @param filter filter coefficients to be used per output pixel for
498 * scaling. This contains 14bpp filtering coefficients.
499 * Guaranteed to contain dstW * filterSize entries.
500 * @param filterPos position of the first input pixel to be used for
501 * each output pixel during scaling. Guaranteed to
502 * contain dstW entries.
503 * @param filterSize the number of input coefficients to be used (and
504 * thus the number of input pixels to be used) for
505 * creating a single output pixel. Is aligned to 4
506 * (and input coefficients thus padded with zeroes)
507 * to simplify creating SIMD code.
510 void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
511 const uint8_t *src, const int16_t *filter,
512 const int32_t *filterPos, int filterSize);
513 void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
514 const uint8_t *src, const int16_t *filter,
515 const int32_t *filterPos, int filterSize);
518 /// Color range conversion function for luma plane if needed.
519 void (*lumConvertRange)(int16_t *dst, int width);
520 /// Color range conversion function for chroma planes if needed.
521 void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width);
523 int needs_hcscale; ///< Set if there are chroma planes to be converted.
525 //FIXME check init (where 0)
527 SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
528 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
529 int fullRange, int brightness,
530 int contrast, int saturation);
532 void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
533 int brightness, int contrast, int saturation);
534 void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
535 int lastInLumBuf, int lastInChrBuf);
537 SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c);
538 SwsFunc ff_yuv2rgb_init_vis(SwsContext *c);
539 SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c);
540 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c);
541 void ff_bfin_get_unscaled_swscale(SwsContext *c);
543 const char *sws_format_name(enum PixelFormat format);
546 (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 15)
548 #define is9_OR_10BPS(x) \
549 (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 8 || \
550 av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 9)
553 (av_pix_fmt_descriptors[x].flags & PIX_FMT_BE)
556 (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB) && \
557 av_pix_fmt_descriptors[x].nb_components >= 2)
559 #define isPlanarYUV(x) \
560 ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR) && \
564 (av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB)
568 (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) && \
569 av_pix_fmt_descriptors[x].nb_components <= 2)
572 ((x) == PIX_FMT_GRAY8 || \
573 (x) == PIX_FMT_Y400A || \
574 (x) == PIX_FMT_GRAY16BE || \
575 (x) == PIX_FMT_GRAY16LE)
578 #define isRGBinInt(x) \
579 ((x) == PIX_FMT_RGB48BE || \
580 (x) == PIX_FMT_RGB48LE || \
581 (x) == PIX_FMT_RGB32 || \
582 (x) == PIX_FMT_RGB32_1 || \
583 (x) == PIX_FMT_RGB24 || \
584 (x) == PIX_FMT_RGB565BE || \
585 (x) == PIX_FMT_RGB565LE || \
586 (x) == PIX_FMT_RGB555BE || \
587 (x) == PIX_FMT_RGB555LE || \
588 (x) == PIX_FMT_RGB444BE || \
589 (x) == PIX_FMT_RGB444LE || \
590 (x) == PIX_FMT_RGB8 || \
591 (x) == PIX_FMT_RGB4 || \
592 (x) == PIX_FMT_RGB4_BYTE || \
593 (x) == PIX_FMT_MONOBLACK || \
594 (x) == PIX_FMT_MONOWHITE)
596 #define isBGRinInt(x) \
597 ((x) == PIX_FMT_BGR48BE || \
598 (x) == PIX_FMT_BGR48LE || \
599 (x) == PIX_FMT_BGR32 || \
600 (x) == PIX_FMT_BGR32_1 || \
601 (x) == PIX_FMT_BGR24 || \
602 (x) == PIX_FMT_BGR565BE || \
603 (x) == PIX_FMT_BGR565LE || \
604 (x) == PIX_FMT_BGR555BE || \
605 (x) == PIX_FMT_BGR555LE || \
606 (x) == PIX_FMT_BGR444BE || \
607 (x) == PIX_FMT_BGR444LE || \
608 (x) == PIX_FMT_BGR8 || \
609 (x) == PIX_FMT_BGR4 || \
610 (x) == PIX_FMT_BGR4_BYTE || \
611 (x) == PIX_FMT_MONOBLACK || \
612 (x) == PIX_FMT_MONOWHITE)
614 #define isAnyRGB(x) \
619 (av_pix_fmt_descriptors[x].nb_components == 2 || \
620 av_pix_fmt_descriptors[x].nb_components == 4)
622 #define isPacked(x) \
623 ((av_pix_fmt_descriptors[x].nb_components >= 2 && \
624 !(av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR)) || \
627 #define isPlanar(x) \
628 (av_pix_fmt_descriptors[x].nb_components >= 2 && \
629 (av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR))
631 #define isPackedRGB(x) \
632 ((av_pix_fmt_descriptors[x].flags & \
633 (PIX_FMT_PLANAR | PIX_FMT_RGB)) == PIX_FMT_RGB)
635 #define isPlanarRGB(x) \
636 ((av_pix_fmt_descriptors[x].flags & \
637 (PIX_FMT_PLANAR | PIX_FMT_RGB)) == (PIX_FMT_PLANAR | PIX_FMT_RGB))
639 #define usePal(x) ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) || \
640 (av_pix_fmt_descriptors[x].flags & PIX_FMT_PSEUDOPAL) || \
641 (x) == PIX_FMT_Y400A)
643 extern const uint64_t ff_dither4[2];
644 extern const uint64_t ff_dither8[2];
646 extern const AVClass sws_context_class;
649 * Set c->swScale to an unscaled converter if one exists for the specific
650 * source and destination formats, bit depths, flags, etc.
652 void ff_get_unscaled_swscale(SwsContext *c);
654 void ff_swscale_get_unscaled_altivec(SwsContext *c);
657 * Return function pointer to fastest main scaler path function depending
658 * on architecture and available optimizations.
660 SwsFunc ff_getSwsFunc(SwsContext *c);
662 void ff_sws_init_input_funcs(SwsContext *c);
663 void ff_sws_init_output_funcs(SwsContext *c,
664 yuv2planar1_fn *yuv2plane1,
665 yuv2planarX_fn *yuv2planeX,
666 yuv2interleavedX_fn *yuv2nv12cX,
667 yuv2packed1_fn *yuv2packed1,
668 yuv2packed2_fn *yuv2packed2,
669 yuv2packedX_fn *yuv2packedX);
670 void ff_sws_init_swScale_altivec(SwsContext *c);
671 void ff_sws_init_swScale_mmx(SwsContext *c);
673 #endif /* SWSCALE_SWSCALE_INTERNAL_H */