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FFmpeg/postproc/swscale.h

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  1. /*

  2.     Copyright (C) 2001-2002 Michael Niedermayer <michaelni@gmx.at>

  3. 

  4.     This program is free software; you can redistribute it and/or modify

  5.     it under the terms of the GNU General Public License as published by

  6.     the Free Software Foundation; either version 2 of the License, or

  7.     (at your option) any later version.

  8. 

  9.     This program is distributed in the hope that it will be useful,

  10.     but WITHOUT ANY WARRANTY; without even the implied warranty of

  11.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  12.     GNU General Public License for more details.

  13. 

  14.     You should have received a copy of the GNU General Public License

  15.     along with this program; if not, write to the Free Software

  16.     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  17. */

  18. 

  19. /* values for the flags, the stuff on the command line is different */

  20. #define SWS_FAST_BILINEAR 1

  21. #define SWS_BILINEAR 2

  22. #define SWS_BICUBIC  4

  23. #define SWS_X        8

  24. #define SWS_POINT    0x10

  25. #define SWS_AREA     0x20

  26. 

  27. //the following 4 flags are not completly implemented

  28. //internal chrominace subsamling info

  29. #define SWS_FULL_CHR_V		0x100

  30. #define SWS_FULL_CHR_H_INT	0x200

  31. //input subsampling info

  32. #define SWS_FULL_CHR_H_INP	0x400

  33. #define SWS_DIRECT_BGR		0x800

  34. 

  35. #define SWS_PRINT_INFO 0x1000

  36. 

  37. #define SWS_MAX_REDUCE_CUTOFF 0.002

  38. 

  39. /* this struct should be aligned on at least 32-byte boundary */

  40. typedef struct SwsContext{

  41. 	int srcW, srcH, dstW, dstH;

  42. 	int chrSrcW, chrSrcH, chrDstW, chrDstH;

  43. 	int lumXInc, chrXInc;

  44. 	int lumYInc, chrYInc;

  45. 	int dstFormat, srcFormat;

  46. 

  47. 	int16_t **lumPixBuf;

  48. 	int16_t **chrPixBuf;

  49. 	int16_t *hLumFilter;

  50. 	int16_t *hLumFilterPos;

  51. 	int16_t *hChrFilter;

  52. 	int16_t *hChrFilterPos;

  53. 	int16_t *vLumFilter;

  54. 	int16_t *vLumFilterPos;

  55. 	int16_t *vChrFilter;

  56. 	int16_t *vChrFilterPos;

  57. 

  58. // Contain simply the values from v(Lum|Chr)Filter just nicely packed for mmx

  59. 	int16_t  *lumMmxFilter;

  60. 	int16_t  *chrMmxFilter;

  61. 	uint8_t formatConvBuffer[4000]; //FIXME dynamic alloc, but we have to change alot of code for this to be usefull

  62. 

  63. 	int hLumFilterSize;

  64. 	int hChrFilterSize;

  65. 	int vLumFilterSize;

  66. 	int vChrFilterSize;

  67. 	int vLumBufSize;

  68. 	int vChrBufSize;

  69. 

  70. 	uint8_t __attribute__((aligned(32))) funnyYCode[10000];

  71. 	uint8_t __attribute__((aligned(32))) funnyUVCode[10000];

  72. 	int32_t *lumMmx2FilterPos;

  73. 	int32_t *chrMmx2FilterPos;

  74. 	int16_t *lumMmx2Filter;

  75. 	int16_t *chrMmx2Filter;

  76. 

  77. 	int canMMX2BeUsed;

  78. 

  79. 	int lastInLumBuf;

  80. 	int lastInChrBuf;

  81. 	int lumBufIndex;

  82. 	int chrBufIndex;

  83. 	int dstY;

  84. 	int flags;

  85. 

  86. 	void (*swScale)(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,

  87.              int srcSliceH, uint8_t* dst[], int dstStride[]);

  88. } SwsContext;

  89. //FIXME check init (where 0)

  90. 

  91. // when used for filters they must have an odd number of elements

  92. // coeffs cannot be shared between vectors

  93. typedef struct {

  94. 	double *coeff;

  95. 	int length;

  96. } SwsVector;

  97. 

  98. // vectors can be shared

  99. typedef struct {

  100. 	SwsVector *lumH;

  101. 	SwsVector *lumV;

  102. 	SwsVector *chrH;

  103. 	SwsVector *chrV;

  104. } SwsFilter;

  105. 

  106. 

  107. // *** bilinear scaling and yuv->rgb & yuv->yuv conversion of yv12 slices:

  108. // *** Note: it's called multiple times while decoding a frame, first time y==0

  109. // dstbpp == 12 -> yv12 output

  110. // will use sws_flags

  111. void SwScale_YV12slice(unsigned char* src[],int srcStride[], int srcSliceY,

  112. 			     int srcSliceH, uint8_t* dst[], int dstStride, int dstbpp,

  113. 			     int srcW, int srcH, int dstW, int dstH);

  114. 

  115. // Obsolete, will be removed soon

  116. void SwScale_Init();

  117. 

  118. 

  119. 

  120. void freeSwsContext(SwsContext *swsContext);

  121. 

  122. SwsContext *getSwsContextFromCmdLine(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat);

  123. SwsContext *getSwsContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  124. 			 SwsFilter *srcFilter, SwsFilter *dstFilter);

  125. 

  126. SwsVector *getGaussianVec(double variance, double quality);

  127. SwsVector *getConstVec(double c, int length);

  128. SwsVector *getIdentityVec(void);

  129. void scaleVec(SwsVector *a, double scalar);

  130. void normalizeVec(SwsVector *a, double height);

  131. void convVec(SwsVector *a, SwsVector *b);

  132. void addVec(SwsVector *a, SwsVector *b);

  133. void subVec(SwsVector *a, SwsVector *b);

  134. void shiftVec(SwsVector *a, int shift);

  135. SwsVector *cloneVec(SwsVector *a);

  136. 

  137. void printVec(SwsVector *a);

  138. void freeVec(SwsVector *a);