PeerStreamer

/*

 * DSP utils

 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard

 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

/**

 * @file

 * DSP utils.

 * note, many functions in here may use MMX which trashes the FPU state, it is

 * absolutely necessary to call emms_c() between dsp & float/double code

 */

#ifndef AVCODEC_DSPUTIL_H

#define AVCODEC_DSPUTIL_H

#include "libavutil/intreadwrite.h"

#include "avcodec.h"

//#define DEBUG

/* dct code */

typedef short DCTELEM;

void fdct_ifast (DCTELEM *data);

void fdct_ifast248 (DCTELEM *data);

void ff_jpeg_fdct_islow (DCTELEM *data);

void ff_fdct248_islow (DCTELEM *data);

void j_rev_dct (DCTELEM *data);

void j_rev_dct4 (DCTELEM *data);

void j_rev_dct2 (DCTELEM *data);

void j_rev_dct1 (DCTELEM *data);

void ff_wmv2_idct_c(DCTELEM *data);

void ff_fdct_mmx(DCTELEM *block);

void ff_fdct_mmx2(DCTELEM *block);

void ff_fdct_sse2(DCTELEM *block);

void ff_h264_idct8_add_c(uint8_t *dst, DCTELEM *block, int stride);

void ff_h264_idct_add_c(uint8_t *dst, DCTELEM *block, int stride);

void ff_h264_idct8_dc_add_c(uint8_t *dst, DCTELEM *block, int stride);

void ff_h264_idct_dc_add_c(uint8_t *dst, DCTELEM *block, int stride);

void ff_h264_lowres_idct_add_c(uint8_t *dst, int stride, DCTELEM *block);

void ff_h264_lowres_idct_put_c(uint8_t *dst, int stride, DCTELEM *block);

void ff_h264_idct_add16_c(uint8_t *dst, const int *blockoffset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]);

void ff_h264_idct_add16intra_c(uint8_t *dst, const int *blockoffset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]);

void ff_h264_idct8_add4_c(uint8_t *dst, const int *blockoffset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]);

void ff_h264_idct_add8_c(uint8_t **dest, const int *blockoffset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]);

void ff_h264_luma_dc_dequant_idct_c(DCTELEM *output, DCTELEM *input, int qmul);

void ff_svq3_luma_dc_dequant_idct_c(DCTELEM *output, DCTELEM *input, int qp);

void ff_svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);

/* encoding scans */

extern const uint8_t ff_alternate_horizontal_scan[64];

extern const uint8_t ff_alternate_vertical_scan[64];

extern const uint8_t ff_zigzag_direct[64];

extern const uint8_t ff_zigzag248_direct[64];

/* pixel operations */

#define MAX_NEG_CROP 1024

/* temporary */

extern uint32_t ff_squareTbl[512];

extern uint8_t ff_cropTbl[256 + 2 * MAX_NEG_CROP];

void ff_put_pixels8x8_c(uint8_t *dst, uint8_t *src, int stride);

void ff_avg_pixels8x8_c(uint8_t *dst, uint8_t *src, int stride);

void ff_put_pixels16x16_c(uint8_t *dst, uint8_t *src, int stride);

void ff_avg_pixels16x16_c(uint8_t *dst, uint8_t *src, int stride);

/* VP3 DSP functions */

void ff_vp3_idct_c(DCTELEM *block/* align 16*/);

void ff_vp3_idct_put_c(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);

void ff_vp3_idct_add_c(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);

void ff_vp3_idct_dc_add_c(uint8_t *dest/*align 8*/, int line_size, const DCTELEM *block/*align 16*/);

void ff_vp3_v_loop_filter_c(uint8_t *src, int stride, int *bounding_values);

void ff_vp3_h_loop_filter_c(uint8_t *src, int stride, int *bounding_values);

/* Bink functions */

void ff_bink_idct_c    (DCTELEM *block);

void ff_bink_idct_add_c(uint8_t *dest, int linesize, DCTELEM *block);

void ff_bink_idct_put_c(uint8_t *dest, int linesize, DCTELEM *block);

/* EA functions */

void ff_ea_idct_put_c(uint8_t *dest, int linesize, DCTELEM *block);

/* 1/2^n downscaling functions from imgconvert.c */

#if LIBAVCODEC_VERSION_MAJOR < 53

/**

 * @deprecated Use av_image_copy_plane() instead.

 */

attribute_deprecated

void ff_img_copy_plane(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);

#endif

void ff_shrink22(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);

void ff_shrink44(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);

void ff_shrink88(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);

void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy,

              int dxx, int dxy, int dyx, int dyy, int shift, int r, int width, int height);

/* minimum alignment rules ;)

If you notice errors in the align stuff, need more alignment for some ASM code

for some CPU or need to use a function with less aligned data then send a mail

to the ffmpeg-devel mailing list, ...

!warning These alignments might not match reality, (missing attribute((align))

stuff somewhere possible).

I (Michael) did not check them, these are just the alignments which I think

could be reached easily ...

!future video codecs might need functions with less strict alignment

*/

/*

void get_pixels_c(DCTELEM *block, const uint8_t *pixels, int line_size);

void diff_pixels_c(DCTELEM *block, const uint8_t *s1, const uint8_t *s2, int stride);

void put_pixels_clamped_c(const DCTELEM *block, uint8_t *pixels, int line_size);

void add_pixels_clamped_c(const DCTELEM *block, uint8_t *pixels, int line_size);

void clear_blocks_c(DCTELEM *blocks);

*/

/* add and put pixel (decoding) */

// blocksizes for op_pixels_func are 8x4,8x8 16x8 16x16

//h for op_pixels_func is limited to {width/2, width} but never larger than 16 and never smaller then 4

typedef void (*op_pixels_func)(uint8_t *block/*align width (8 or 16)*/, const uint8_t *pixels/*align 1*/, int line_size, int h);

typedef void (*tpel_mc_func)(uint8_t *block/*align width (8 or 16)*/, const uint8_t *pixels/*align 1*/, int line_size, int w, int h);

typedef void (*qpel_mc_func)(uint8_t *dst/*align width (8 or 16)*/, uint8_t *src/*align 1*/, int stride);

typedef void (*h264_chroma_mc_func)(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int srcStride, int h, int x, int y);

typedef void (*op_fill_func)(uint8_t *block/*align width (8 or 16)*/, uint8_t value, int line_size, int h);

#define DEF_OLD_QPEL(name)\

void ff_put_        ## name (uint8_t *dst/*align width (8 or 16)*/, uint8_t *src/*align 1*/, int stride);\

void ff_put_no_rnd_ ## name (uint8_t *dst/*align width (8 or 16)*/, uint8_t *src/*align 1*/, int stride);\

void ff_avg_        ## name (uint8_t *dst/*align width (8 or 16)*/, uint8_t *src/*align 1*/, int stride);

DEF_OLD_QPEL(qpel16_mc11_old_c)

DEF_OLD_QPEL(qpel16_mc31_old_c)

DEF_OLD_QPEL(qpel16_mc12_old_c)

DEF_OLD_QPEL(qpel16_mc32_old_c)

DEF_OLD_QPEL(qpel16_mc13_old_c)

DEF_OLD_QPEL(qpel16_mc33_old_c)

DEF_OLD_QPEL(qpel8_mc11_old_c)

DEF_OLD_QPEL(qpel8_mc31_old_c)

DEF_OLD_QPEL(qpel8_mc12_old_c)

DEF_OLD_QPEL(qpel8_mc32_old_c)

DEF_OLD_QPEL(qpel8_mc13_old_c)

DEF_OLD_QPEL(qpel8_mc33_old_c)

#define CALL_2X_PIXELS(a, b, n)\

static void a(uint8_t *block, const uint8_t *pixels, int line_size, int h){\

    b(block  , pixels  , line_size, h);\

    b(block+n, pixels+n, line_size, h);\

}

/* motion estimation */

// h is limited to {width/2, width, 2*width} but never larger than 16 and never smaller then 2

// although currently h<4 is not used as functions with width <8 are neither used nor implemented

typedef int (*me_cmp_func)(void /*MpegEncContext*/ *s, uint8_t *blk1/*align width (8 or 16)*/, uint8_t *blk2/*align 1*/, int line_size, int h)/* __attribute__ ((const))*/;

/**

 * Scantable.

 */

typedef struct ScanTable{

    const uint8_t *scantable;

    uint8_t permutated[64];

    uint8_t raster_end[64];

#if ARCH_PPC

                /** Used by dct_quantize_altivec to find last-non-zero */

    DECLARE_ALIGNED(16, uint8_t, inverse)[64];

#endif

} ScanTable;

void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);

void ff_emulated_edge_mc(uint8_t *buf, const uint8_t *src, int linesize,

                         int block_w, int block_h,

                         int src_x, int src_y, int w, int h);

void ff_add_pixels_clamped_c(const DCTELEM *block, uint8_t *dest, int linesize);

void ff_put_pixels_clamped_c(const DCTELEM *block, uint8_t *dest, int linesize);

void ff_put_signed_pixels_clamped_c(const DCTELEM *block, uint8_t *dest, int linesize);

/**

 * DSPContext.

 */

typedef struct DSPContext {

    /* pixel ops : interface with DCT */

    void (*get_pixels)(DCTELEM *block/*align 16*/, const uint8_t *pixels/*align 8*/, int line_size);

    void (*diff_pixels)(DCTELEM *block/*align 16*/, const uint8_t *s1/*align 8*/, const uint8_t *s2/*align 8*/, int stride);

    void (*put_pixels_clamped)(const DCTELEM *block/*align 16*/, uint8_t *pixels/*align 8*/, int line_size);

    void (*put_signed_pixels_clamped)(const DCTELEM *block/*align 16*/, uint8_t *pixels/*align 8*/, int line_size);

    void (*put_pixels_nonclamped)(const DCTELEM *block/*align 16*/, uint8_t *pixels/*align 8*/, int line_size);

    void (*add_pixels_clamped)(const DCTELEM *block/*align 16*/, uint8_t *pixels/*align 8*/, int line_size);

    void (*add_pixels8)(uint8_t *pixels, DCTELEM *block, int line_size);

    void (*add_pixels4)(uint8_t *pixels, DCTELEM *block, int line_size);

    int (*sum_abs_dctelem)(DCTELEM *block/*align 16*/);

    /**

     * Motion estimation with emulated edge values.

     * @param buf pointer to destination buffer (unaligned)

     * @param src pointer to pixel source (unaligned)

     * @param linesize width (in pixels) for src/buf

     * @param block_w number of pixels (per row) to copy to buf

     * @param block_h nummber of pixel rows to copy to buf

     * @param src_x offset of src to start of row - this may be negative

     * @param src_y offset of src to top of image - this may be negative

     * @param w width of src in pixels

     * @param h height of src in pixels

     */

    void (*emulated_edge_mc)(uint8_t *buf, const uint8_t *src, int linesize,

                             int block_w, int block_h,

                             int src_x, int src_y, int w, int h);

    /**

     * translational global motion compensation.

     */

    void (*gmc1)(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int srcStride, int h, int x16, int y16, int rounder);

    /**

     * global motion compensation.

     */

    void (*gmc )(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int stride, int h, int ox, int oy,

                    int dxx, int dxy, int dyx, int dyy, int shift, int r, int width, int height);

    void (*clear_block)(DCTELEM *block/*align 16*/);

    void (*clear_blocks)(DCTELEM *blocks/*align 16*/);

    int (*pix_sum)(uint8_t * pix, int line_size);

    int (*pix_norm1)(uint8_t * pix, int line_size);

// 16x16 8x8 4x4 2x2 16x8 8x4 4x2 8x16 4x8 2x4

    me_cmp_func sad[6]; /* identical to pix_absAxA except additional void * */

    me_cmp_func sse[6];

    me_cmp_func hadamard8_diff[6];

    me_cmp_func dct_sad[6];

    me_cmp_func quant_psnr[6];

    me_cmp_func bit[6];

    me_cmp_func rd[6];

    me_cmp_func vsad[6];

    me_cmp_func vsse[6];

    me_cmp_func nsse[6];

    me_cmp_func w53[6];

    me_cmp_func w97[6];

    me_cmp_func dct_max[6];

    me_cmp_func dct264_sad[6];

    me_cmp_func me_pre_cmp[6];

    me_cmp_func me_cmp[6];

    me_cmp_func me_sub_cmp[6];

    me_cmp_func mb_cmp[6];

    me_cmp_func ildct_cmp[6]; //only width 16 used

    me_cmp_func frame_skip_cmp[6]; //only width 8 used

    int (*ssd_int8_vs_int16)(const int8_t *pix1, const int16_t *pix2,

                             int size);

    /**

     * Halfpel motion compensation with rounding (a+b+1)>>1.

     * this is an array[4][4] of motion compensation functions for 4

     * horizontal blocksizes (8,16) and the 4 halfpel positions<br>

     * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ]

     * @param block destination where the result is stored

     * @param pixels source

     * @param line_size number of bytes in a horizontal line of block

     * @param h height

     */

    op_pixels_func put_pixels_tab[4][4];

    /**

     * Halfpel motion compensation with rounding (a+b+1)>>1.

     * This is an array[4][4] of motion compensation functions for 4

     * horizontal blocksizes (8,16) and the 4 halfpel positions<br>

     * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ]

     * @param block destination into which the result is averaged (a+b+1)>>1

     * @param pixels source

     * @param line_size number of bytes in a horizontal line of block

     * @param h height

     */

    op_pixels_func avg_pixels_tab[4][4];

    /**

     * Halfpel motion compensation with no rounding (a+b)>>1.

     * this is an array[2][4] of motion compensation functions for 2

     * horizontal blocksizes (8,16) and the 4 halfpel positions<br>

     * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ]

     * @param block destination where the result is stored

     * @param pixels source

     * @param line_size number of bytes in a horizontal line of block

     * @param h height

     */

    op_pixels_func put_no_rnd_pixels_tab[4][4];

    /**

     * Halfpel motion compensation with no rounding (a+b)>>1.

     * this is an array[2][4] of motion compensation functions for 2

     * horizontal blocksizes (8,16) and the 4 halfpel positions<br>

     * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ]

     * @param block destination into which the result is averaged (a+b)>>1

     * @param pixels source

     * @param line_size number of bytes in a horizontal line of block

     * @param h height

     */

    op_pixels_func avg_no_rnd_pixels_tab[4][4];

    void (*put_no_rnd_pixels_l2[2])(uint8_t *block/*align width (8 or 16)*/, const uint8_t *a/*align 1*/, const uint8_t *b/*align 1*/, int line_size, int h);

    /**

     * Thirdpel motion compensation with rounding (a+b+1)>>1.

     * this is an array[12] of motion compensation functions for the 9 thirdpe

     * positions<br>

     * *pixels_tab[ xthirdpel + 4*ythirdpel ]

     * @param block destination where the result is stored

     * @param pixels source

     * @param line_size number of bytes in a horizontal line of block

     * @param h height

     */

    tpel_mc_func put_tpel_pixels_tab[11]; //FIXME individual func ptr per width?

    tpel_mc_func avg_tpel_pixels_tab[11]; //FIXME individual func ptr per width?

    qpel_mc_func put_qpel_pixels_tab[2][16];

    qpel_mc_func avg_qpel_pixels_tab[2][16];

    qpel_mc_func put_no_rnd_qpel_pixels_tab[2][16];

    qpel_mc_func avg_no_rnd_qpel_pixels_tab[2][16];

    qpel_mc_func put_mspel_pixels_tab[8];

    /**

     * h264 Chroma MC

     */

    h264_chroma_mc_func put_h264_chroma_pixels_tab[3];

    h264_chroma_mc_func avg_h264_chroma_pixels_tab[3];

    qpel_mc_func put_h264_qpel_pixels_tab[4][16];

    qpel_mc_func avg_h264_qpel_pixels_tab[4][16];

    qpel_mc_func put_2tap_qpel_pixels_tab[4][16];

    qpel_mc_func avg_2tap_qpel_pixels_tab[4][16];

    me_cmp_func pix_abs[2][4];

    /* huffyuv specific */

    void (*add_bytes)(uint8_t *dst/*align 16*/, uint8_t *src/*align 16*/, int w);

    void (*add_bytes_l2)(uint8_t *dst/*align 16*/, uint8_t *src1/*align 16*/, uint8_t *src2/*align 16*/, int w);

    void (*diff_bytes)(uint8_t *dst/*align 16*/, uint8_t *src1/*align 16*/, uint8_t *src2/*align 1*/,int w);

    /**

     * subtract huffyuv's variant of median prediction

     * note, this might read from src1[-1], src2[-1]

     */

    void (*sub_hfyu_median_prediction)(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, int w, int *left, int *left_top);

    void (*add_hfyu_median_prediction)(uint8_t *dst, const uint8_t *top, const uint8_t *diff, int w, int *left, int *left_top);

    int  (*add_hfyu_left_prediction)(uint8_t *dst, const uint8_t *src, int w, int left);

    void (*add_hfyu_left_prediction_bgr32)(uint8_t *dst, const uint8_t *src, int w, int *red, int *green, int *blue, int *alpha);

    /* this might write to dst[w] */

    void (*add_png_paeth_prediction)(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp);

    void (*bswap_buf)(uint32_t *dst, const uint32_t *src, int w);

    void (*bswap16_buf)(uint16_t *dst, const uint16_t *src, int len);

    void (*h263_v_loop_filter)(uint8_t *src, int stride, int qscale);

    void (*h263_h_loop_filter)(uint8_t *src, int stride, int qscale);

    void (*h261_loop_filter)(uint8_t *src, int stride);

    void (*x8_v_loop_filter)(uint8_t *src, int stride, int qscale);

    void (*x8_h_loop_filter)(uint8_t *src, int stride, int qscale);

    void (*vp3_idct_dc_add)(uint8_t *dest/*align 8*/, int line_size, const DCTELEM *block/*align 16*/);

    void (*vp3_v_loop_filter)(uint8_t *src, int stride, int *bounding_values);

    void (*vp3_h_loop_filter)(uint8_t *src, int stride, int *bounding_values);

    /* assume len is a multiple of 4, and arrays are 16-byte aligned */

    void (*vorbis_inverse_coupling)(float *mag, float *ang, int blocksize);

    void (*ac3_downmix)(float (*samples)[256], float (*matrix)[2], int out_ch, int in_ch, int len);

    /* assume len is a multiple of 8, and arrays are 16-byte aligned */

    void (*vector_fmul)(float *dst, const float *src0, const float *src1, int len);

    void (*vector_fmul_reverse)(float *dst, const float *src0, const float *src1, int len);

    /* assume len is a multiple of 8, and src arrays are 16-byte aligned */

    void (*vector_fmul_add)(float *dst, const float *src0, const float *src1, const float *src2, int len);

    /* assume len is a multiple of 4, and arrays are 16-byte aligned */

    void (*vector_fmul_window)(float *dst, const float *src0, const float *src1, const float *win, int len);

    /* assume len is a multiple of 8, and arrays are 16-byte aligned */

    void (*vector_clipf)(float *dst /* align 16 */, const float *src /* align 16 */, float min, float max, int len /* align 16 */);

    /**

     * Multiply a vector of floats by a scalar float.  Source and

     * destination vectors must overlap exactly or not at all.

     * @param dst result vector, 16-byte aligned

     * @param src input vector, 16-byte aligned

     * @param mul scalar value

     * @param len length of vector, multiple of 4

     */

    void (*vector_fmul_scalar)(float *dst, const float *src, float mul,

                               int len);

    /**

     * Multiply a vector of floats by concatenated short vectors of

     * floats and by a scalar float.  Source and destination vectors

     * must overlap exactly or not at all.

     * [0]: short vectors of length 2, 8-byte aligned

     * [1]: short vectors of length 4, 16-byte aligned

     * @param dst output vector, 16-byte aligned

     * @param src input vector, 16-byte aligned

     * @param sv  array of pointers to short vectors

     * @param mul scalar value

     * @param len number of elements in src and dst, multiple of 4

     */

    void (*vector_fmul_sv_scalar[2])(float *dst, const float *src,

                                     const float **sv, float mul, int len);

    /**

     * Multiply short vectors of floats by a scalar float, store

     * concatenated result.

     * [0]: short vectors of length 2, 8-byte aligned

     * [1]: short vectors of length 4, 16-byte aligned

     * @param dst output vector, 16-byte aligned

     * @param sv  array of pointers to short vectors

     * @param mul scalar value

     * @param len number of output elements, multiple of 4

     */

    void (*sv_fmul_scalar[2])(float *dst, const float **sv,

                              float mul, int len);

    /**

     * Calculate the scalar product of two vectors of floats.

     * @param v1  first vector, 16-byte aligned

     * @param v2  second vector, 16-byte aligned

     * @param len length of vectors, multiple of 4

     */

    float (*scalarproduct_float)(const float *v1, const float *v2, int len);

    /**

     * Calculate the sum and difference of two vectors of floats.

     * @param v1  first input vector, sum output, 16-byte aligned

     * @param v2  second input vector, difference output, 16-byte aligned

     * @param len length of vectors, multiple of 4

     */

    void (*butterflies_float)(float *restrict v1, float *restrict v2, int len);

    /* (I)DCT */

    void (*fdct)(DCTELEM *block/* align 16*/);

    void (*fdct248)(DCTELEM *block/* align 16*/);

    /* IDCT really*/

    void (*idct)(DCTELEM *block/* align 16*/);

    /**

     * block -> idct -> clip to unsigned 8 bit -> dest.

     * (-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...)

     * @param line_size size in bytes of a horizontal line of dest

     */

    void (*idct_put)(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);

    /**

     * block -> idct -> add dest -> clip to unsigned 8 bit -> dest.

     * @param line_size size in bytes of a horizontal line of dest

     */

    void (*idct_add)(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);

    /**

     * idct input permutation.

     * several optimized IDCTs need a permutated input (relative to the normal order of the reference

     * IDCT)

     * this permutation must be performed before the idct_put/add, note, normally this can be merged

     * with the zigzag/alternate scan<br>

     * an example to avoid confusion:

     * - (->decode coeffs -> zigzag reorder -> dequant -> reference idct ->...)

     * - (x -> referece dct -> reference idct -> x)

     * - (x -> referece dct -> simple_mmx_perm = idct_permutation -> simple_idct_mmx -> x)

     * - (->decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant -> simple_idct_mmx ->...)

     */

    uint8_t idct_permutation[64];

    int idct_permutation_type;

#define FF_NO_IDCT_PERM 1

#define FF_LIBMPEG2_IDCT_PERM 2

#define FF_SIMPLE_IDCT_PERM 3

#define FF_TRANSPOSE_IDCT_PERM 4

#define FF_PARTTRANS_IDCT_PERM 5

#define FF_SSE2_IDCT_PERM 6

    int (*try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale);

    void (*add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale);

#define BASIS_SHIFT 16

#define RECON_SHIFT 6

    void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w, int sides);

#define EDGE_WIDTH 16

#define EDGE_TOP    1

#define EDGE_BOTTOM 2

    void (*prefetch)(void *mem, int stride, int h);

    void (*shrink[4])(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);

    /* mlp/truehd functions */

    void (*mlp_filter_channel)(int32_t *state, const int32_t *coeff,

                               int firorder, int iirorder,

                               unsigned int filter_shift, int32_t mask, int blocksize,

                               int32_t *sample_buffer);

    /* intrax8 functions */

    void (*x8_spatial_compensation[12])(uint8_t *src , uint8_t *dst, int linesize);

    void (*x8_setup_spatial_compensation)(uint8_t *src, uint8_t *dst, int linesize,

           int * range, int * sum,  int edges);

    /**

     * Calculate scalar product of two vectors.

     * @param len length of vectors, should be multiple of 16

     * @param shift number of bits to discard from product

     */

    int32_t (*scalarproduct_int16)(const int16_t *v1, const int16_t *v2/*align 16*/, int len, int shift);

    /* ape functions */

    /**

     * Calculate scalar product of v1 and v2,

     * and v1[i] += v3[i] * mul

     * @param len length of vectors, should be multiple of 16

     */

    int32_t (*scalarproduct_and_madd_int16)(int16_t *v1/*align 16*/, const int16_t *v2, const int16_t *v3, int len, int mul);

    /* rv30 functions */

    qpel_mc_func put_rv30_tpel_pixels_tab[4][16];

    qpel_mc_func avg_rv30_tpel_pixels_tab[4][16];

    /* rv40 functions */

    qpel_mc_func put_rv40_qpel_pixels_tab[4][16];

    qpel_mc_func avg_rv40_qpel_pixels_tab[4][16];

    h264_chroma_mc_func put_rv40_chroma_pixels_tab[3];

    h264_chroma_mc_func avg_rv40_chroma_pixels_tab[3];

    /* bink functions */

    op_fill_func fill_block_tab[2];

    void (*scale_block)(const uint8_t src[64]/*align 8*/, uint8_t *dst/*align 8*/, int linesize);

} DSPContext;

void dsputil_static_init(void);

void dsputil_init(DSPContext* p, AVCodecContext *avctx);

int ff_check_alignment(void);

/**

 * permute block according to permuatation.

 * @param last last non zero element in scantable order

 */

void ff_block_permute(DCTELEM *block, uint8_t *permutation, const uint8_t *scantable, int last);

void ff_set_cmp(DSPContext* c, me_cmp_func *cmp, int type);

#define         BYTE_VEC32(c)   ((c)*0x01010101UL)

static inline uint32_t rnd_avg32(uint32_t a, uint32_t b)

{

    return (a | b) - (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);

}

static inline uint32_t no_rnd_avg32(uint32_t a, uint32_t b)

{

    return (a & b) + (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);

}

static inline int get_penalty_factor(int lambda, int lambda2, int type){

    switch(type&0xFF){

    default:

    case FF_CMP_SAD:

        return lambda>>FF_LAMBDA_SHIFT;

    case FF_CMP_DCT:

        return (3*lambda)>>(FF_LAMBDA_SHIFT+1);

    case FF_CMP_W53:

        return (4*lambda)>>(FF_LAMBDA_SHIFT);

    case FF_CMP_W97:

        return (2*lambda)>>(FF_LAMBDA_SHIFT);

    case FF_CMP_SATD:

    case FF_CMP_DCT264:

        return (2*lambda)>>FF_LAMBDA_SHIFT;

    case FF_CMP_RD:

    case FF_CMP_PSNR:

    case FF_CMP_SSE:

    case FF_CMP_NSSE:

        return lambda2>>FF_LAMBDA_SHIFT;

    case FF_CMP_BIT:

        return 1;

    }

}

/**

 * Empty mmx state.

 * this must be called between any dsp function and float/double code.

 * for example sin(); dsp->idct_put(); emms_c(); cos()

 */

#define emms_c()

void dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_arm(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_bfin(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_mlib(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_mmi(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_vis(DSPContext* c, AVCodecContext *avctx);

void ff_dsputil_init_dwt(DSPContext *c);

void ff_rv30dsp_init(DSPContext* c, AVCodecContext *avctx);

void ff_rv40dsp_init(DSPContext* c, AVCodecContext *avctx);

void ff_intrax8dsp_init(DSPContext* c, AVCodecContext *avctx);

void ff_mlp_init(DSPContext* c, AVCodecContext *avctx);

void ff_mlp_init_x86(DSPContext* c, AVCodecContext *avctx);

#if HAVE_MMX

#undef emms_c

static inline void emms(void)

{

    __asm__ volatile ("emms;":::"memory");

}

#define emms_c() emms()

#elif ARCH_ARM

#if HAVE_NEON

#   define STRIDE_ALIGN 16

#endif

#elif ARCH_PPC

#define STRIDE_ALIGN 16

#elif HAVE_MMI

#define STRIDE_ALIGN 16

#endif

#ifndef STRIDE_ALIGN

#   define STRIDE_ALIGN 8

#endif

#define LOCAL_ALIGNED_A(a, t, v, s, o, ...)             \

    uint8_t la_##v[sizeof(t s o) + (a)];                \

    t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)

#define LOCAL_ALIGNED_D(a, t, v, s, o, ...) DECLARE_ALIGNED(a, t, v) s o

#define LOCAL_ALIGNED(a, t, v, ...) LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,)

#if HAVE_LOCAL_ALIGNED_8

#   define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,)

#else

#   define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)

#endif

#if HAVE_LOCAL_ALIGNED_16

#   define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,)

#else

#   define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)

#endif

/* PSNR */

void get_psnr(uint8_t *orig_image[3], uint8_t *coded_image[3],

              int orig_linesize[3], int coded_linesize,

              AVCodecContext *avctx);

#define WRAPPER8_16(name8, name16)\

static int name16(void /*MpegEncContext*/ *s, uint8_t *dst, uint8_t *src, int stride, int h){\

    return name8(s, dst           , src           , stride, h)\

          +name8(s, dst+8         , src+8         , stride, h);\

}

#define WRAPPER8_16_SQ(name8, name16)\

static int name16(void /*MpegEncContext*/ *s, uint8_t *dst, uint8_t *src, int stride, int h){\

    int score=0;\

    score +=name8(s, dst           , src           , stride, 8);\

    score +=name8(s, dst+8         , src+8         , stride, 8);\

    if(h==16){\

        dst += 8*stride;\

        src += 8*stride;\

        score +=name8(s, dst           , src           , stride, 8);\

        score +=name8(s, dst+8         , src+8         , stride, 8);\

    }\

    return score;\

}

static inline void copy_block2(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)

{

    int i;

    for(i=0; i<h; i++)

    {

        AV_WN16(dst   , AV_RN16(src   ));

        dst+=dstStride;

        src+=srcStride;

    }

}

static inline void copy_block4(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)

{

    int i;

    for(i=0; i<h; i++)

    {

        AV_WN32(dst   , AV_RN32(src   ));

        dst+=dstStride;

        src+=srcStride;

    }

}

static inline void copy_block8(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)

{

    int i;

    for(i=0; i<h; i++)

    {

        AV_WN32(dst   , AV_RN32(src   ));

        AV_WN32(dst+4 , AV_RN32(src+4 ));

        dst+=dstStride;

        src+=srcStride;

    }

}

static inline void copy_block9(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)

{

    int i;

    for(i=0; i<h; i++)

    {

        AV_WN32(dst   , AV_RN32(src   ));

        AV_WN32(dst+4 , AV_RN32(src+4 ));

        dst[8]= src[8];

        dst+=dstStride;

        src+=srcStride;

    }

}

static inline void copy_block16(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)

{

    int i;

    for(i=0; i<h; i++)

    {

        AV_WN32(dst   , AV_RN32(src   ));

        AV_WN32(dst+4 , AV_RN32(src+4 ));

        AV_WN32(dst+8 , AV_RN32(src+8 ));

        AV_WN32(dst+12, AV_RN32(src+12));

        dst+=dstStride;

        src+=srcStride;

    }

}

static inline void copy_block17(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)

{

    int i;

    for(i=0; i<h; i++)

    {

        AV_WN32(dst   , AV_RN32(src   ));

        AV_WN32(dst+4 , AV_RN32(src+4 ));

        AV_WN32(dst+8 , AV_RN32(src+8 ));

        AV_WN32(dst+12, AV_RN32(src+12));

        dst[16]= src[16];

        dst+=dstStride;

        src+=srcStride;

    }

}

#endif /* AVCODEC_DSPUTIL_H */