ffmpeg/libavcodec/snow_dwt.h

   1 /*
   2  * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef AVCODEC_SNOW_DWT_H
  22 #define AVCODEC_SNOW_DWT_H
  23
  24 #include <stdint.h>
  25
  26 typedef int DWTELEM;
  27 typedef short IDWTELEM;
  28
  29 #define MAX_DECOMPOSITIONS 8
  30
  31 typedef struct DWTCompose {
  32     IDWTELEM *b0;
  33     IDWTELEM *b1;
  34     IDWTELEM *b2;
  35     IDWTELEM *b3;
  36     int y;
  37 } DWTCompose;
  38
  39 /** Used to minimize the amount of memory used in order to
  40  *  optimize cache performance. **/
  41 typedef struct slice_buffer_s {
  42     IDWTELEM **line;   ///< For use by idwt and predict_slices.
  43     IDWTELEM **data_stack;   ///< Used for internal purposes.
  44     int data_stack_top;
  45     int line_count;
  46     int line_width;
  47     int data_count;
  48     IDWTELEM *base_buffer;  ///< Buffer that this structure is caching.
  49 } slice_buffer;
  50
  51 struct SnowDWTContext;
  52
  53 typedef struct SnowDWTContext {
  54     void (*vertical_compose97i)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
  55                                 IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
  56                                 int width);
  57     void (*horizontal_compose97i)(IDWTELEM *b, IDWTELEM *temp, int width);
  58     void (*inner_add_yblock)(const uint8_t *obmc, const int obmc_stride,
  59                              uint8_t **block, int b_w, int b_h, int src_x,
  60                              int src_y, int src_stride, slice_buffer *sb,
  61                              int add, uint8_t *dst8);
  62 } SnowDWTContext;
  63
  64
  65 #define DWT_97 0
  66 #define DWT_53 1
  67
  68 #define liftS lift
  69 #define W_AM 3
  70 #define W_AO 0
  71 #define W_AS 1
  72
  73 #undef liftS
  74 #define W_BM 1
  75 #define W_BO 8
  76 #define W_BS 4
  77
  78 #define W_CM 1
  79 #define W_CO 0
  80 #define W_CS 0
  81
  82 #define W_DM 3
  83 #define W_DO 4
  84 #define W_DS 3
  85
  86 #define slice_buffer_get_line(slice_buf, line_num)                          \
  87     ((slice_buf)->line[line_num] ? (slice_buf)->line[line_num]              \
  88                                  : ff_slice_buffer_load_line((slice_buf),   \
  89                                                              (line_num)))
  90
  91 int ff_slice_buffer_init(slice_buffer *buf, int line_count,
  92                          int max_allocated_lines, int line_width,
  93                          IDWTELEM *base_buffer);
  94 void ff_slice_buffer_release(slice_buffer *buf, int line);
  95 void ff_slice_buffer_flush(slice_buffer *buf);
  96 void ff_slice_buffer_destroy(slice_buffer *buf);
  97 IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line);
  98
  99 void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 100                                  IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
 101                                  int width);
 102 void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width);
 103 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
 104                               uint8_t **block, int b_w, int b_h, int src_x,
 105                               int src_y, int src_stride, slice_buffer *sb,
 106                               int add, uint8_t *dst8);
 107
 108 int ff_w53_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
 109 int ff_w97_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
 110
 111 void ff_spatial_dwt(int *buffer, int *temp, int width, int height, int stride,
 112                     int type, int decomposition_count);
 113
 114 void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
 115                                    int height, int stride_line, int type,
 116                                    int decomposition_count);
 117 void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
 118                                     slice_buffer *slice_buf, IDWTELEM *temp,
 119                                     int width, int height, int stride_line,
 120                                     int type, int decomposition_count, int y);
 121 void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
 122                      int stride, int type, int decomposition_count);
 123
 124 void ff_dwt_init(SnowDWTContext *c);
 125 void ff_dwt_init_x86(SnowDWTContext *c);
 126
 127 #endif /* AVCODEC_DWT_H */