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/*
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 * DSP utils
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 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */
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#ifndef DSPUTIL_H
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#define DSPUTIL_H
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#include "common.h"
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#include "avcodec.h"
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//#define DEBUG
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/* dct code */
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typedef short DCTELEM;
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void fdct_ifast (DCTELEM *data);
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void ff_jpeg_fdct_islow (DCTELEM *data);
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void j_rev_dct (DCTELEM *data);
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void ff_fdct_mmx(DCTELEM *block);
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/* encoding scans */
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extern const UINT8 ff_alternate_horizontal_scan[64];
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extern const UINT8 ff_alternate_vertical_scan[64];
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extern const UINT8 ff_zigzag_direct[64];
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/* pixel operations */
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#define MAX_NEG_CROP 384
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/* temporary */
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extern UINT32 squareTbl[512];
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extern UINT8 cropTbl[256 + 2 * MAX_NEG_CROP];
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void dsputil_init(void);
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/* minimum alignment rules ;)
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if u notice errors in the align stuff, need more alignment for some asm code for some cpu 
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or need to use a function with less aligned data then send a mail to the ffmpeg-dev list, ...
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!warning these alignments might not match reallity, (missing attribute((align)) stuff somewhere possible)
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i (michael) didnt check them, these are just the alignents which i think could be reached easily ...
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!future video codecs might need functions with less strict alignment
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*/
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/* pixel ops : interface with DCT */
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extern void (*get_pixels)(DCTELEM *block/*align 16*/, const UINT8 *pixels/*align 8*/, int line_size);
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extern void (*diff_pixels)(DCTELEM *block/*align 16*/, const UINT8 *s1/*align 8*/, const UINT8 *s2/*align 8*/, int stride);
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extern void (*put_pixels_clamped)(const DCTELEM *block/*align 16*/, UINT8 *pixels/*align 8*/, int line_size);
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extern void (*add_pixels_clamped)(const DCTELEM *block/*align 16*/, UINT8 *pixels/*align 8*/, int line_size);
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extern void (*ff_gmc1)(UINT8 *dst/*align 8*/, UINT8 *src/*align 1*/, int srcStride, int h, int x16, int y16, int rounder);
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extern void (*ff_gmc )(UINT8 *dst/*align 8*/, UINT8 *src/*align 1*/, int stride, int h, int ox, int oy, 
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                  int dxx, int dxy, int dyx, int dyy, int shift, int r, int width, int height);
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extern void (*clear_blocks)(DCTELEM *blocks/*align 16*/);
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extern int (*pix_sum)(UINT8 * pix, int line_size);
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extern int (*pix_norm1)(UINT8 * pix, int line_size);
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void get_pixels_c(DCTELEM *block, const UINT8 *pixels, int line_size);
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void diff_pixels_c(DCTELEM *block, const UINT8 *s1, const UINT8 *s2, int stride);
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void put_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size);
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void add_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size);
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void clear_blocks_c(DCTELEM *blocks);
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/* add and put pixel (decoding) */
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// blocksizes for op_pixels_func are 8x4,8x8 16x8 16x16
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typedef void (*op_pixels_func)(UINT8 *block/*align width (8 or 16)*/, const UINT8 *pixels/*align 1*/, int line_size, int h);
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typedef void (*qpel_mc_func)(UINT8 *dst/*align width (8 or 16)*/, UINT8 *src/*align 1*/, int stride);
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extern op_pixels_func put_pixels_tab[2][4];
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extern op_pixels_func avg_pixels_tab[2][4];
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extern op_pixels_func put_no_rnd_pixels_tab[2][4];
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extern op_pixels_func avg_no_rnd_pixels_tab[2][4];
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extern qpel_mc_func put_qpel_pixels_tab[2][16];
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extern qpel_mc_func avg_qpel_pixels_tab[2][16];
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extern qpel_mc_func put_no_rnd_qpel_pixels_tab[2][16];
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extern qpel_mc_func avg_no_rnd_qpel_pixels_tab[2][16];
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#define CALL_2X_PIXELS(a, b, n)\
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static void a(uint8_t *block, const uint8_t *pixels, int line_size, int h){\
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    b(block  , pixels  , line_size, h);\
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    b(block+n, pixels+n, line_size, h);\
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}
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/* motion estimation */
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typedef int (*op_pixels_abs_func)(UINT8 *blk1/*align width (8 or 16)*/, UINT8 *blk2/*align 1*/, int line_size);
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extern op_pixels_abs_func pix_abs16x16;
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extern op_pixels_abs_func pix_abs16x16_x2;
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extern op_pixels_abs_func pix_abs16x16_y2;
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extern op_pixels_abs_func pix_abs16x16_xy2;
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extern op_pixels_abs_func pix_abs8x8;
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extern op_pixels_abs_func pix_abs8x8_x2;
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extern op_pixels_abs_func pix_abs8x8_y2;
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extern op_pixels_abs_func pix_abs8x8_xy2;
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int pix_abs16x16_c(UINT8 *blk1, UINT8 *blk2, int lx);
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int pix_abs16x16_x2_c(UINT8 *blk1, UINT8 *blk2, int lx);
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int pix_abs16x16_y2_c(UINT8 *blk1, UINT8 *blk2, int lx);
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int pix_abs16x16_xy2_c(UINT8 *blk1, UINT8 *blk2, int lx);
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/**
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 * permute block according to permuatation.
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 * @param last last non zero element in scantable order
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 */
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void ff_block_permute(INT16 *block, UINT8 *permutation, const UINT8 *scantable, int last);
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#if defined(HAVE_MMX)
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#define MM_MMX    0x0001 /* standard MMX */
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#define MM_3DNOW  0x0004 /* AMD 3DNOW */
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#define MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
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#define MM_SSE    0x0008 /* SSE functions */
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#define MM_SSE2   0x0010 /* PIV SSE2 functions */
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extern int mm_flags;
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int mm_support(void);
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static inline void emms(void)
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{
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    __asm __volatile ("emms;":::"memory");
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}
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#define emms_c() \
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{\
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    if (mm_flags & MM_MMX)\
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        emms();\
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}
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#define __align8 __attribute__ ((aligned (8)))
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void dsputil_init_mmx(void);
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void dsputil_set_bit_exact_mmx(void);
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#elif defined(ARCH_ARMV4L)
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#define emms_c()
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/* This is to use 4 bytes read to the IDCT pointers for some 'zero'
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   line ptimizations */
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#define __align8 __attribute__ ((aligned (4)))
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void dsputil_init_armv4l(void);   
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#elif defined(HAVE_MLIB)
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#define emms_c()
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/* SPARC/VIS IDCT needs 8-byte aligned DCT blocks */
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#define __align8 __attribute__ ((aligned (8)))
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void dsputil_init_mlib(void);   
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#elif defined(ARCH_ALPHA)
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#define emms_c()
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#define __align8 __attribute__ ((aligned (8)))
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void dsputil_init_alpha(void);
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#elif defined(ARCH_POWERPC)
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#define emms_c()
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#define __align8 __attribute__ ((aligned (16)))
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void dsputil_init_ppc(void);
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#elif defined(HAVE_MMI)
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#define emms_c()
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#define __align8 __attribute__ ((aligned (16)))
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void dsputil_init_mmi(void);   
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#else
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#define emms_c()
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#define __align8
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#endif
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#ifdef __GNUC__
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struct unaligned_64 { uint64_t l; } __attribute__((packed));
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struct unaligned_32 { uint32_t l; } __attribute__((packed));
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#define LD32(a) (((const struct unaligned_32 *) (a))->l)
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#define LD64(a) (((const struct unaligned_64 *) (a))->l)
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#define ST32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
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#else /* __GNUC__ */
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#define LD32(a) (*((uint32_t*)(a)))
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#define LD64(a) (*((uint64_t*)(a)))
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#define ST32(a, b) *((uint32_t*)(a)) = (b)
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#endif /* !__GNUC__ */
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/* PSNR */
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void get_psnr(UINT8 *orig_image[3], UINT8 *coded_image[3],
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              int orig_linesize[3], int coded_linesize,
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              AVCodecContext *avctx);
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/* FFT computation */
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/* NOTE: soon integer code will be added, so you must use the
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   FFTSample type */
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typedef float FFTSample;
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typedef struct FFTComplex {
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    FFTSample re, im;
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} FFTComplex;
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typedef struct FFTContext {
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    int nbits;
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    int inverse;
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    uint16_t *revtab;
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    FFTComplex *exptab;
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    FFTComplex *exptab1; /* only used by SSE code */
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    void (*fft_calc)(struct FFTContext *s, FFTComplex *z);
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} FFTContext;
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int fft_init(FFTContext *s, int nbits, int inverse);
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void fft_permute(FFTContext *s, FFTComplex *z);
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void fft_calc_c(FFTContext *s, FFTComplex *z);
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void fft_calc_sse(FFTContext *s, FFTComplex *z);
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static inline void fft_calc(FFTContext *s, FFTComplex *z)
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{
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    s->fft_calc(s, z);
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}
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void fft_end(FFTContext *s);
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/* MDCT computation */
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typedef struct MDCTContext {
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    int n;  /* size of MDCT (i.e. number of input data * 2) */
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    int nbits; /* n = 2^nbits */
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    /* pre/post rotation tables */
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    FFTSample *tcos;
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    FFTSample *tsin;
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    FFTContext fft;
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} MDCTContext;
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int ff_mdct_init(MDCTContext *s, int nbits, int inverse);
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void ff_imdct_calc(MDCTContext *s, FFTSample *output, 
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                const FFTSample *input, FFTSample *tmp);
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void ff_mdct_calc(MDCTContext *s, FFTSample *out, 
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               const FFTSample *input, FFTSample *tmp);
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void ff_mdct_end(MDCTContext *s);
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__)
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/* XXX: add ISOC specific test to avoid specific BSD testing. */
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/* better than nothing implementation. */
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/* btw, rintf() is existing on fbsd too -- alex */
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static inline long int lrintf(float x)
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{
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    return (int)(rint(x));
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}
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#endif
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#endif