libavcodec/dsputil.h

   1 /*
   2  * DSP utils
   3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19 #ifndef DSPUTIL_H
  20 #define DSPUTIL_H
  21
  22 #include "common.h"
  23 #include "avcodec.h"
  24
  25 //#define DEBUG
  26 /* dct code */
  27 typedef short DCTELEM;
  28
  29 void fdct_ifast (DCTELEM *data);
  30 void ff_jpeg_fdct_islow (DCTELEM *data);
  31
  32 void j_rev_dct (DCTELEM *data);
  33
  34 void ff_fdct_mmx(DCTELEM *block);
  35
  36 /* encoding scans */
  37 extern const UINT8 ff_alternate_horizontal_scan[64];
  38 extern const UINT8 ff_alternate_vertical_scan[64];
  39 extern const UINT8 ff_zigzag_direct[64];
  40
  41 /* pixel operations */
  42 #define MAX_NEG_CROP 384
  43
  44 /* temporary */
  45 extern UINT32 squareTbl[512];
  46 extern UINT8 cropTbl[256 + 2 * MAX_NEG_CROP];
  47
  48 void dsputil_init(void);
  49
  50 /* minimum alignment rules ;)
  51 if u notice errors in the align stuff, need more alignment for some asm code for some cpu
  52 or need to use a function with less aligned data then send a mail to the ffmpeg-dev list, ...
  53
  54 !warning these alignments might not match reallity, (missing attribute((align)) stuff somewhere possible)
  55 i (michael) didnt check them, these are just the alignents which i think could be reached easily ...
  56
  57 !future video codecs might need functions with less strict alignment
  58 */
  59
  60 /* pixel ops : interface with DCT */
  61 extern void (*get_pixels)(DCTELEM *block/*align 16*/, const UINT8 *pixels/*align 8*/, int line_size);
  62 extern void (*diff_pixels)(DCTELEM *block/*align 16*/, const UINT8 *s1/*align 8*/, const UINT8 *s2/*align 8*/, int stride);
  63 extern void (*put_pixels_clamped)(const DCTELEM *block/*align 16*/, UINT8 *pixels/*align 8*/, int line_size);
  64 extern void (*add_pixels_clamped)(const DCTELEM *block/*align 16*/, UINT8 *pixels/*align 8*/, int line_size);
  65 extern void (*ff_gmc1)(UINT8 *dst/*align 8*/, UINT8 *src/*align 1*/, int srcStride, int h, int x16, int y16, int rounder);
  66 extern void (*ff_gmc )(UINT8 *dst/*align 8*/, UINT8 *src/*align 1*/, int stride, int h, int ox, int oy,
  67                   int dxx, int dxy, int dyx, int dyy, int shift, int r, int width, int height);
  68 extern void (*clear_blocks)(DCTELEM *blocks/*align 16*/);
  69 extern int (*pix_sum)(UINT8 * pix, int line_size);
  70 extern int (*pix_norm1)(UINT8 * pix, int line_size);
  71
  72
  73
  74 void get_pixels_c(DCTELEM *block, const UINT8 *pixels, int line_size);
  75 void diff_pixels_c(DCTELEM *block, const UINT8 *s1, const UINT8 *s2, int stride);
  76 void put_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size);
  77 void add_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size);
  78 void clear_blocks_c(DCTELEM *blocks);
  79
  80 /* add and put pixel (decoding) */
  81 // blocksizes for op_pixels_func are 8x4,8x8 16x8 16x16
  82 typedef void (*op_pixels_func)(UINT8 *block/*align width (8 or 16)*/, const UINT8 *pixels/*align 1*/, int line_size, int h);
  83 typedef void (*qpel_mc_func)(UINT8 *dst/*align width (8 or 16)*/, UINT8 *src/*align 1*/, int stride);
  84
  85 extern op_pixels_func put_pixels_tab[2][4];
  86 extern op_pixels_func avg_pixels_tab[2][4];
  87 extern op_pixels_func put_no_rnd_pixels_tab[2][4];
  88 extern op_pixels_func avg_no_rnd_pixels_tab[2][4];
  89 extern qpel_mc_func put_qpel_pixels_tab[2][16];
  90 extern qpel_mc_func avg_qpel_pixels_tab[2][16];
  91 extern qpel_mc_func put_no_rnd_qpel_pixels_tab[2][16];
  92 extern qpel_mc_func avg_no_rnd_qpel_pixels_tab[2][16];
  93
  94 #define CALL_2X_PIXELS(a, b, n)\
  95 static void a(uint8_t *block, const uint8_t *pixels, int line_size, int h){\
  96     b(block  , pixels  , line_size, h);\
  97     b(block+n, pixels+n, line_size, h);\
  98 }
  99
 100 /* motion estimation */
 101
 102 typedef int (*op_pixels_abs_func)(UINT8 *blk1/*align width (8 or 16)*/, UINT8 *blk2/*align 1*/, int line_size);
 103
 104 extern op_pixels_abs_func pix_abs16x16;
 105 extern op_pixels_abs_func pix_abs16x16_x2;
 106 extern op_pixels_abs_func pix_abs16x16_y2;
 107 extern op_pixels_abs_func pix_abs16x16_xy2;
 108 extern op_pixels_abs_func pix_abs8x8;
 109 extern op_pixels_abs_func pix_abs8x8_x2;
 110 extern op_pixels_abs_func pix_abs8x8_y2;
 111 extern op_pixels_abs_func pix_abs8x8_xy2;
 112
 113 int pix_abs16x16_c(UINT8 *blk1, UINT8 *blk2, int lx);
 114 int pix_abs16x16_x2_c(UINT8 *blk1, UINT8 *blk2, int lx);
 115 int pix_abs16x16_y2_c(UINT8 *blk1, UINT8 *blk2, int lx);
 116 int pix_abs16x16_xy2_c(UINT8 *blk1, UINT8 *blk2, int lx);
 117
 118 /**
 119  * permute block according to permuatation.
 120  * @param last last non zero element in scantable order
 121  */
 122 void ff_block_permute(INT16 *block, UINT8 *permutation, const UINT8 *scantable, int last);
 123
 124 #if defined(HAVE_MMX)
 125
 126 #define MM_MMX    0x0001 /* standard MMX */
 127 #define MM_3DNOW  0x0004 /* AMD 3DNOW */
 128 #define MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
 129 #define MM_SSE    0x0008 /* SSE functions */
 130 #define MM_SSE2   0x0010 /* PIV SSE2 functions */
 131
 132 extern int mm_flags;
 133
 134 int mm_support(void);
 135
 136 static inline void emms(void)
 137 {
 138     __asm __volatile ("emms;":::"memory");
 139 }
 140
 141 #define emms_c() \
 142 {\
 143     if (mm_flags & MM_MMX)\
 144         emms();\
 145 }
 146
 147 #define __align8 __attribute__ ((aligned (8)))
 148
 149 void dsputil_init_mmx(void);
 150 void dsputil_set_bit_exact_mmx(void);
 151
 152 #elif defined(ARCH_ARMV4L)
 153
 154 #define emms_c()
 155
 156 /* This is to use 4 bytes read to the IDCT pointers for some 'zero'
 157    line ptimizations */
 158 #define __align8 __attribute__ ((aligned (4)))
 159
 160 void dsputil_init_armv4l(void);
 161
 162 #elif defined(HAVE_MLIB)
 163
 164 #define emms_c()
 165
 166 /* SPARC/VIS IDCT needs 8-byte aligned DCT blocks */
 167 #define __align8 __attribute__ ((aligned (8)))
 168
 169 void dsputil_init_mlib(void);
 170
 171 #elif defined(ARCH_ALPHA)
 172
 173 #define emms_c()
 174 #define __align8 __attribute__ ((aligned (8)))
 175
 176 void dsputil_init_alpha(void);
 177
 178 #elif defined(ARCH_POWERPC)
 179
 180 #define emms_c()
 181 #define __align8 __attribute__ ((aligned (16)))
 182
 183 void dsputil_init_ppc(void);
 184
 185 #elif defined(HAVE_MMI)
 186
 187 #define emms_c()
 188
 189 #define __align8 __attribute__ ((aligned (16)))
 190
 191 void dsputil_init_mmi(void);
 192
 193 #else
 194
 195 #define emms_c()
 196
 197 #define __align8
 198
 199 #endif
 200
 201 #ifdef __GNUC__
 202
 203 struct unaligned_64 { uint64_t l; } __attribute__((packed));
 204 struct unaligned_32 { uint32_t l; } __attribute__((packed));
 205
 206 #define LD32(a) (((const struct unaligned_32 *) (a))->l)
 207 #define LD64(a) (((const struct unaligned_64 *) (a))->l)
 208
 209 #define ST32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
 210
 211 #else /* __GNUC__ */
 212
 213 #define LD32(a) (*((uint32_t*)(a)))
 214 #define LD64(a) (*((uint64_t*)(a)))
 215
 216 #define ST32(a, b) *((uint32_t*)(a)) = (b)
 217
 218 #endif /* !__GNUC__ */
 219
 220 /* PSNR */
 221 void get_psnr(UINT8 *orig_image[3], UINT8 *coded_image[3],
 222               int orig_linesize[3], int coded_linesize,
 223               AVCodecContext *avctx);
 224
 225 /* FFT computation */
 226
 227 /* NOTE: soon integer code will be added, so you must use the
 228    FFTSample type */
 229 typedef float FFTSample;
 230
 231 typedef struct FFTComplex {
 232     FFTSample re, im;
 233 } FFTComplex;
 234
 235 typedef struct FFTContext {
 236     int nbits;
 237     int inverse;
 238     uint16_t *revtab;
 239     FFTComplex *exptab;
 240     FFTComplex *exptab1; /* only used by SSE code */
 241     void (*fft_calc)(struct FFTContext *s, FFTComplex *z);
 242 } FFTContext;
 243
 244 int fft_init(FFTContext *s, int nbits, int inverse);
 245 void fft_permute(FFTContext *s, FFTComplex *z);
 246 void fft_calc_c(FFTContext *s, FFTComplex *z);
 247 void fft_calc_sse(FFTContext *s, FFTComplex *z);
 248 static inline void fft_calc(FFTContext *s, FFTComplex *z)
 249 {
 250     s->fft_calc(s, z);
 251 }
 252 void fft_end(FFTContext *s);
 253
 254 /* MDCT computation */
 255
 256 typedef struct MDCTContext {
 257     int n;  /* size of MDCT (i.e. number of input data * 2) */
 258     int nbits; /* n = 2^nbits */
 259     /* pre/post rotation tables */
 260     FFTSample *tcos;
 261     FFTSample *tsin;
 262     FFTContext fft;
 263 } MDCTContext;
 264
 265 int mdct_init(MDCTContext *s, int nbits, int inverse);
 266 void imdct_calc(MDCTContext *s, FFTSample *output,
 267                 const FFTSample *input, FFTSample *tmp);
 268 void mdct_calc(MDCTContext *s, FFTSample *out,
 269                const FFTSample *input, FFTSample *tmp);
 270 void mdct_end(MDCTContext *s);
 271
 272 #endif