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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (at your option) any later version.
  8.  *
  9.  * FFmpeg 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 GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with FFmpeg; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. #ifndef AVCODEC_ME_CMP_H
  20. #define AVCODEC_ME_CMP_H
  21.  
  22. #include <stdint.h>
  23.  
  24. #include "avcodec.h"
  25.  
  26. extern uint32_t ff_square_tab[512];
  27.  
  28.  
  29. /* minimum alignment rules ;)
  30.  * If you notice errors in the align stuff, need more alignment for some ASM code
  31.  * for some CPU or need to use a function with less aligned data then send a mail
  32.  * to the ffmpeg-devel mailing list, ...
  33.  *
  34.  * !warning These alignments might not match reality, (missing attribute((align))
  35.  * stuff somewhere possible).
  36.  * I (Michael) did not check them, these are just the alignments which I think
  37.  * could be reached easily ...
  38.  *
  39.  * !future video codecs might need functions with less strict alignment
  40.  */
  41.  
  42. struct MpegEncContext;
  43. /* Motion estimation:
  44.  * h is limited to { width / 2, width, 2 * width },
  45.  * but never larger than 16 and never smaller than 2.
  46.  * Although currently h < 4 is not used as functions with
  47.  * width < 8 are neither used nor implemented. */
  48. typedef int (*me_cmp_func)(struct MpegEncContext *c,
  49.                            uint8_t *blk1 /* align width (8 or 16) */,
  50.                            uint8_t *blk2 /* align 1 */, ptrdiff_t stride,
  51.                            int h);
  52.  
  53. typedef struct MECmpContext {
  54.     int (*sum_abs_dctelem)(int16_t *block /* align 16 */);
  55.  
  56.     me_cmp_func sad[6]; /* identical to pix_absAxA except additional void * */
  57.     me_cmp_func sse[6];
  58.     me_cmp_func hadamard8_diff[6];
  59.     me_cmp_func dct_sad[6];
  60.     me_cmp_func quant_psnr[6];
  61.     me_cmp_func bit[6];
  62.     me_cmp_func rd[6];
  63.     me_cmp_func vsad[6];
  64.     me_cmp_func vsse[6];
  65.     me_cmp_func nsse[6];
  66.     me_cmp_func w53[6];
  67.     me_cmp_func w97[6];
  68.     me_cmp_func dct_max[6];
  69.     me_cmp_func dct264_sad[6];
  70.  
  71.     me_cmp_func me_pre_cmp[6];
  72.     me_cmp_func me_cmp[6];
  73.     me_cmp_func me_sub_cmp[6];
  74.     me_cmp_func mb_cmp[6];
  75.     me_cmp_func ildct_cmp[6]; // only width 16 used
  76.     me_cmp_func frame_skip_cmp[6]; // only width 8 used
  77.  
  78.     me_cmp_func pix_abs[2][4];
  79. } MECmpContext;
  80.  
  81. void ff_me_cmp_init_static(void);
  82.  
  83. int ff_check_alignment(void);
  84.  
  85. void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx);
  86. void ff_me_cmp_init_alpha(MECmpContext *c, AVCodecContext *avctx);
  87. void ff_me_cmp_init_arm(MECmpContext *c, AVCodecContext *avctx);
  88. void ff_me_cmp_init_ppc(MECmpContext *c, AVCodecContext *avctx);
  89. void ff_me_cmp_init_x86(MECmpContext *c, AVCodecContext *avctx);
  90. void ff_me_cmp_init_mips(MECmpContext *c, AVCodecContext *avctx);
  91.  
  92. void ff_set_cmp(MECmpContext *c, me_cmp_func *cmp, int type);
  93.  
  94. void ff_dsputil_init_dwt(MECmpContext *c);
  95.  
  96. #endif /* AVCODEC_ME_CMP_H */
  97.