swscale_internal.h
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1 /*
2  * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of Libav.
5  *
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.
10  *
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.
15  *
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
19  */
20 
21 #ifndef SWSCALE_SWSCALE_INTERNAL_H
22 #define SWSCALE_SWSCALE_INTERNAL_H
23 
24 #include "config.h"
25 
26 #if HAVE_ALTIVEC_H
27 #include <altivec.h>
28 #endif
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/avutil.h"
32 #include "libavutil/common.h"
33 #include "libavutil/log.h"
34 #include "libavutil/pixfmt.h"
35 #include "libavutil/pixdesc.h"
36 
37 #define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
38 
39 #define FAST_BGR2YV12 // use 7-bit instead of 15-bit coefficients
40 
41 #define MAX_FILTER_SIZE 256
42 
43 #if HAVE_BIGENDIAN
44 #define ALT32_CORR (-1)
45 #else
46 #define ALT32_CORR 1
47 #endif
48 
49 #if ARCH_X86_64
50 # define APCK_PTR2 8
51 # define APCK_COEF 16
52 # define APCK_SIZE 24
53 #else
54 # define APCK_PTR2 4
55 # define APCK_COEF 8
56 # define APCK_SIZE 16
57 #endif
58 
59 struct SwsContext;
60 
61 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[],
62  int srcStride[], int srcSliceY, int srcSliceH,
63  uint8_t *dst[], int dstStride[]);
64 
77 typedef void (*yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW,
78  const uint8_t *dither, int offset);
79 
93 typedef void (*yuv2planarX_fn)(const int16_t *filter, int filterSize,
94  const int16_t **src, uint8_t *dest, int dstW,
95  const uint8_t *dither, int offset);
96 
112 typedef void (*yuv2interleavedX_fn)(struct SwsContext *c,
113  const int16_t *chrFilter,
114  int chrFilterSize,
115  const int16_t **chrUSrc,
116  const int16_t **chrVSrc,
117  uint8_t *dest, int dstW);
118 
148 typedef void (*yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc,
149  const int16_t *chrUSrc[2],
150  const int16_t *chrVSrc[2],
151  const int16_t *alpSrc, uint8_t *dest,
152  int dstW, int uvalpha, int y);
181 typedef void (*yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2],
182  const int16_t *chrUSrc[2],
183  const int16_t *chrVSrc[2],
184  const int16_t *alpSrc[2],
185  uint8_t *dest,
186  int dstW, int yalpha, int uvalpha, int y);
213 typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
214  const int16_t **lumSrc, int lumFilterSize,
215  const int16_t *chrFilter,
216  const int16_t **chrUSrc,
217  const int16_t **chrVSrc, int chrFilterSize,
218  const int16_t **alpSrc, uint8_t *dest,
219  int dstW, int y);
220 
221 /* This struct should be aligned on at least a 32-byte boundary. */
222 typedef struct SwsContext {
227 
233  int srcW;
234  int srcH;
235  int dstH;
236  int chrSrcW;
237  int chrSrcH;
238  int chrDstW;
239  int chrDstH;
251  int vChrDrop;
252  int sliceDir;
253  double param[2];
254 
255  uint32_t pal_yuv[256];
256  uint32_t pal_rgb[256];
257 
268  int16_t **lumPixBuf;
269  int16_t **chrUPixBuf;
270  int16_t **chrVPixBuf;
271  int16_t **alpPixBuf;
278 
279 
281 
296  int16_t *hLumFilter;
297  int16_t *hChrFilter;
298  int16_t *vLumFilter;
299  int16_t *vChrFilter;
308 
309 
314 
316 
317  int dstY;
318  int flags;
319  void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
322  int table_gV[256];
324 
325  //Colorspace stuff
326  int contrast, brightness, saturation; // for sws_getColorspaceDetails
329  int srcRange;
330  int dstRange;
337 
338 #define RED_DITHER "0*8"
339 #define GREEN_DITHER "1*8"
340 #define BLUE_DITHER "2*8"
341 #define Y_COEFF "3*8"
342 #define VR_COEFF "4*8"
343 #define UB_COEFF "5*8"
344 #define VG_COEFF "6*8"
345 #define UG_COEFF "7*8"
346 #define Y_OFFSET "8*8"
347 #define U_OFFSET "9*8"
348 #define V_OFFSET "10*8"
349 #define LUM_MMX_FILTER_OFFSET "11*8"
350 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
351 #define DSTW_OFFSET "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
352 #define ESP_OFFSET "11*8+4*4*256*2+8"
353 #define VROUNDER_OFFSET "11*8+4*4*256*2+16"
354 #define U_TEMP "11*8+4*4*256*2+24"
355 #define V_TEMP "11*8+4*4*256*2+32"
356 #define Y_TEMP "11*8+4*4*256*2+40"
357 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
358 #define UV_OFF_PX "11*8+4*4*256*3+48"
359 #define UV_OFF_BYTE "11*8+4*4*256*3+56"
360 #define DITHER16 "11*8+4*4*256*3+64"
361 #define DITHER32 "11*8+4*4*256*3+80"
362 
363  DECLARE_ALIGNED(8, uint64_t, redDither);
366 
367  DECLARE_ALIGNED(8, uint64_t, yCoeff);
368  DECLARE_ALIGNED(8, uint64_t, vrCoeff);
369  DECLARE_ALIGNED(8, uint64_t, ubCoeff);
370  DECLARE_ALIGNED(8, uint64_t, vgCoeff);
371  DECLARE_ALIGNED(8, uint64_t, ugCoeff);
372  DECLARE_ALIGNED(8, uint64_t, yOffset);
373  DECLARE_ALIGNED(8, uint64_t, uOffset);
374  DECLARE_ALIGNED(8, uint64_t, vOffset);
377  int dstW;
378  DECLARE_ALIGNED(8, uint64_t, esp);
379  DECLARE_ALIGNED(8, uint64_t, vRounder);
380  DECLARE_ALIGNED(8, uint64_t, u_temp);
381  DECLARE_ALIGNED(8, uint64_t, v_temp);
382  DECLARE_ALIGNED(8, uint64_t, y_temp);
384  // alignment of these values is not necessary, but merely here
385  // to maintain the same offset across x8632 and x86-64. Once we
386  // use proper offset macros in the asm, they can be removed.
387  DECLARE_ALIGNED(8, ptrdiff_t, uv_off_px);
388  DECLARE_ALIGNED(8, ptrdiff_t, uv_off_byte);
389  DECLARE_ALIGNED(8, uint16_t, dither16)[8];
390  DECLARE_ALIGNED(8, uint32_t, dither32)[8];
391 
393 
394 #if HAVE_ALTIVEC
395  vector signed short CY;
396  vector signed short CRV;
397  vector signed short CBU;
398  vector signed short CGU;
399  vector signed short CGV;
400  vector signed short OY;
401  vector unsigned short CSHIFT;
402  vector signed short *vYCoeffsBank, *vCCoeffsBank;
403 #endif
404 
405 #if ARCH_BFIN
406  DECLARE_ALIGNED(4, uint32_t, oy);
407  DECLARE_ALIGNED(4, uint32_t, oc);
408  DECLARE_ALIGNED(4, uint32_t, zero);
409  DECLARE_ALIGNED(4, uint32_t, cy);
410  DECLARE_ALIGNED(4, uint32_t, crv);
411  DECLARE_ALIGNED(4, uint32_t, rmask);
412  DECLARE_ALIGNED(4, uint32_t, cbu);
413  DECLARE_ALIGNED(4, uint32_t, bmask);
414  DECLARE_ALIGNED(4, uint32_t, cgu);
415  DECLARE_ALIGNED(4, uint32_t, cgv);
416  DECLARE_ALIGNED(4, uint32_t, gmask);
417 #endif
418 
419 #if HAVE_VIS
420  DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10];
421 #endif
422 
423  /* function pointers for swScale() */
430 
432  void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
433  int width, uint32_t *pal);
435  void (*alpToYV12)(uint8_t *dst, const uint8_t *src,
436  int width, uint32_t *pal);
438  void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
439  const uint8_t *src1, const uint8_t *src2,
440  int width, uint32_t *pal);
441 
447  void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width);
448  void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4],
449  int width);
472  int16_t *dst, int dstWidth,
473  const uint8_t *src, int srcW, int xInc);
475  int16_t *dst1, int16_t *dst2, int dstWidth,
476  const uint8_t *src1, const uint8_t *src2,
477  int srcW, int xInc);
511  void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
512  const uint8_t *src, const int16_t *filter,
513  const int32_t *filterPos, int filterSize);
514  void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
515  const uint8_t *src, const int16_t *filter,
516  const int32_t *filterPos, int filterSize);
519  void (*lumConvertRange)(int16_t *dst, int width);
522  void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width);
523 
525 } SwsContext;
526 //FIXME check init (where 0)
527 
529 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
530  int fullRange, int brightness,
531  int contrast, int saturation);
532 
533 void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
534  int brightness, int contrast, int saturation);
536  int lastInLumBuf, int lastInChrBuf);
537 
543 
544 const char *sws_format_name(enum AVPixelFormat format);
545 
547 {
548  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
549  av_assert0(desc);
550  return desc->comp[0].depth_minus1 == 15;
551 }
552 
554 {
555  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
556  av_assert0(desc);
557  return desc->comp[0].depth_minus1 == 8 || desc->comp[0].depth_minus1 == 9;
558 }
559 
561 {
562  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
563  av_assert0(desc);
564  return desc->flags & PIX_FMT_BE;
565 }
566 
568 {
569  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
570  av_assert0(desc);
571  return !(desc->flags & PIX_FMT_RGB) && desc->nb_components >= 2;
572 }
573 
575 {
576  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
577  av_assert0(desc);
578  return ((desc->flags & PIX_FMT_PLANAR) && isYUV(pix_fmt));
579 }
580 
582 {
583  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
584  av_assert0(desc);
585  return (desc->flags & PIX_FMT_RGB);
586 }
587 
588 #if 0 // FIXME
589 #define isGray(x) \
590  (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) && \
591  av_pix_fmt_descriptors[x].nb_components <= 2)
592 #else
593 #define isGray(x) \
594  ((x) == AV_PIX_FMT_GRAY8 || \
595  (x) == AV_PIX_FMT_Y400A || \
596  (x) == AV_PIX_FMT_GRAY16BE || \
597  (x) == AV_PIX_FMT_GRAY16LE)
598 #endif
599 
600 #define isRGBinInt(x) \
601  ((x) == AV_PIX_FMT_RGB48BE || \
602  (x) == AV_PIX_FMT_RGB48LE || \
603  (x) == AV_PIX_FMT_RGB32 || \
604  (x) == AV_PIX_FMT_RGB32_1 || \
605  (x) == AV_PIX_FMT_RGB24 || \
606  (x) == AV_PIX_FMT_RGB565BE || \
607  (x) == AV_PIX_FMT_RGB565LE || \
608  (x) == AV_PIX_FMT_RGB555BE || \
609  (x) == AV_PIX_FMT_RGB555LE || \
610  (x) == AV_PIX_FMT_RGB444BE || \
611  (x) == AV_PIX_FMT_RGB444LE || \
612  (x) == AV_PIX_FMT_RGB8 || \
613  (x) == AV_PIX_FMT_RGB4 || \
614  (x) == AV_PIX_FMT_RGB4_BYTE || \
615  (x) == AV_PIX_FMT_MONOBLACK || \
616  (x) == AV_PIX_FMT_MONOWHITE)
617 
618 #define isBGRinInt(x) \
619  ((x) == AV_PIX_FMT_BGR48BE || \
620  (x) == AV_PIX_FMT_BGR48LE || \
621  (x) == AV_PIX_FMT_BGR32 || \
622  (x) == AV_PIX_FMT_BGR32_1 || \
623  (x) == AV_PIX_FMT_BGR24 || \
624  (x) == AV_PIX_FMT_BGR565BE || \
625  (x) == AV_PIX_FMT_BGR565LE || \
626  (x) == AV_PIX_FMT_BGR555BE || \
627  (x) == AV_PIX_FMT_BGR555LE || \
628  (x) == AV_PIX_FMT_BGR444BE || \
629  (x) == AV_PIX_FMT_BGR444LE || \
630  (x) == AV_PIX_FMT_BGR8 || \
631  (x) == AV_PIX_FMT_BGR4 || \
632  (x) == AV_PIX_FMT_BGR4_BYTE || \
633  (x) == AV_PIX_FMT_MONOBLACK || \
634  (x) == AV_PIX_FMT_MONOWHITE)
635 
636 #define isAnyRGB(x) \
637  (isRGBinInt(x) || \
638  isBGRinInt(x))
639 
641 {
642  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
643  av_assert0(desc);
644  return desc->nb_components == 2 || desc->nb_components == 4;
645 }
646 
648 {
649  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
650  av_assert0(desc);
651  return ((desc->nb_components >= 2 && !(desc->flags & PIX_FMT_PLANAR)) ||
652  pix_fmt == AV_PIX_FMT_PAL8);
653 }
654 
656 {
657  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
658  av_assert0(desc);
659  return (desc->nb_components >= 2 && (desc->flags & PIX_FMT_PLANAR));
660 }
661 
663 {
664  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
665  av_assert0(desc);
666  return ((desc->flags & (PIX_FMT_PLANAR | PIX_FMT_RGB)) == PIX_FMT_RGB);
667 }
668 
670 {
671  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
672  av_assert0(desc);
673  return ((desc->flags & (PIX_FMT_PLANAR | PIX_FMT_RGB)) ==
675 }
676 
678 {
679  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
680  av_assert0(desc);
681  return ((desc->flags & PIX_FMT_PAL) || (desc->flags & PIX_FMT_PSEUDOPAL) ||
682  pix_fmt == AV_PIX_FMT_Y400A);
683 }
684 
685 extern const uint64_t ff_dither4[2];
686 extern const uint64_t ff_dither8[2];
687 
688 extern const AVClass sws_context_class;
689 
695 
697 
703 
714 
715 #endif /* SWSCALE_SWSCALE_INTERNAL_H */