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Directory:	../../../ffmpeg/
File:	src/libavcodec/snow_dwt.h
Date:	2025-08-04 00:43:16

	Exec	Total	Coverage
Lines:	15	18	83.3%
Functions:	3	3	100.0%
Branches:	8	10	80.0%

  
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      Branch
      Exec
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      /*
    
       * Copyright (C) 2004-2010 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
    
       */
    
      #ifndef AVCODEC_SNOW_DWT_H
    
      #define AVCODEC_SNOW_DWT_H
    
      #include <stddef.h>
    
      #include <stdint.h>
    
      #include "libavutil/attributes.h"
    
      typedef struct MPVEncContext MPVEncContext;
    
      typedef int DWTELEM;
    
      typedef short IDWTELEM;
    
      #define MAX_DECOMPOSITIONS 8
    
      typedef struct DWTCompose {
    
          IDWTELEM *b0;
    
          IDWTELEM *b1;
    
          IDWTELEM *b2;
    
          IDWTELEM *b3;
    
          int y;
    
      } DWTCompose;
    
      /** Used to minimize the amount of memory used in order to
    
       *  optimize cache performance. **/
    
      typedef struct slice_buffer_s {
    
          IDWTELEM **line;   ///< For use by idwt and predict_slices.
    
          IDWTELEM **data_stack;   ///< Used for internal purposes.
    
          int data_stack_top;
    
          int line_count;
    
          int line_width;
    
          int data_count;
    
          IDWTELEM *base_buffer;  ///< Buffer that this structure is caching.
    
      } slice_buffer;
    
      struct SnowDWTContext;
    
      typedef struct SnowDWTContext {
    
          void (*vertical_compose97i)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
    
                                      IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
    
                                      int width);
    
          void (*horizontal_compose97i)(IDWTELEM *b, IDWTELEM *temp, int width);
    
          void (*inner_add_yblock)(const uint8_t *obmc, const int obmc_stride,
    
                                   uint8_t **block, int b_w, int b_h, int src_x,
    
                                   int src_y, int src_stride, slice_buffer *sb,
    
                                   int add, uint8_t *dst8);
    
      } SnowDWTContext;
    
      #define DWT_97 0
    
      #define DWT_53 1
    
      #define liftS lift
    
      #define W_AM 3
    
      #define W_AO 0
    
      #define W_AS 1
    
      #undef liftS
    
      #define W_BM 1
    
      #define W_BO 8
    
      #define W_BS 4
    
      #define W_CM 1
    
      #define W_CO 0
    
      #define W_CS 0
    
      #define W_DM 3
    
      #define W_DO 4
    
      #define W_DS 3
    
      #define slice_buffer_get_line(slice_buf, line_num)                          \
    
          ((slice_buf)->line[line_num] ? (slice_buf)->line[line_num]              \
    
                                       : ff_slice_buffer_load_line((slice_buf),   \
    
                                                                   (line_num)))
    
      /* C bits used by mmx/sse2/altivec */
    
      248
      static av_always_inline void snow_interleave_line_header(int *i, int width, IDWTELEM *low, IDWTELEM *high)
    
      {
    
      248
          *i = width - 2;
    
        1/2✗ Branch 0 not taken.
✓ Branch 1 taken 248 times.

      248
          if (width & 1) {
    
      ✗
              low[*i + 1] = low[(*i + 1)>>1];
    
      ✗
              (*i)--;
    
          }
    
      248
      }
    
      static av_always_inline void snow_interleave_line_footer(int *i, IDWTELEM *low, const IDWTELEM *high)
    
      {
    
          for (; *i >= 0; *i -= 2) {
    
              low[*i + 1] = high[*i >> 1];
    
              low[*i]     =  low[*i >> 1];
    
          }
    
      }
    
      744
      static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, IDWTELEM *dst, const IDWTELEM *src, const IDWTELEM *ref, int width, int w, int lift_high, int mul, int add, int shift)
    
      {
    
        2/2✓ Branch 0 taken 4992 times.
✓ Branch 1 taken 744 times.

      5736
          for (; i < w; i++)
    
      4992
              dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
    
        2/2✓ Branch 0 taken 496 times.
✓ Branch 1 taken 248 times.

      744
          if ((width ^ lift_high) & 1)
    
      496
              dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
    
      744
      }
    
      248
      static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM *dst, const IDWTELEM *src, const IDWTELEM *ref, int width, int w)
    
      {
    
        2/2✓ Branch 0 taken 1664 times.
✓ Branch 1 taken 248 times.

      1912
          for (; i < w; i++)
    
      1664
              dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
    
        1/2✗ Branch 0 not taken.
✓ Branch 1 taken 248 times.

      248
          if (width & 1)
    
      ✗
              dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
    
      248
      }
    
      int ff_slice_buffer_init(slice_buffer *buf, int line_count,
    
                               int max_allocated_lines, int line_width,
    
                               IDWTELEM *base_buffer);
    
      void ff_slice_buffer_release(slice_buffer *buf, int line);
    
      void ff_slice_buffer_flush(slice_buffer *buf);
    
      void ff_slice_buffer_destroy(slice_buffer *buf);
    
      IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line);
    
      void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
    
                                    uint8_t **block, int b_w, int b_h, int src_x,
    
                                    int src_y, int src_stride, slice_buffer *sb,
    
                                    int add, uint8_t *dst8);
    
      int ff_w53_32_c(MPVEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h);
    
      int ff_w97_32_c(MPVEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h);
    
      void ff_spatial_dwt(int *buffer, int *temp, int width, int height, int stride,
    
                          int type, int decomposition_count);
    
      void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
    
                                         int height, int stride_line, int type,
    
                                         int decomposition_count);
    
      void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
    
                                          slice_buffer *slice_buf, IDWTELEM *temp,
    
                                          int width, int height, int stride_line,
    
                                          int type, int decomposition_count, int y);
    
      void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
    
                           int stride, int type, int decomposition_count);
    
      void ff_dwt_init(SnowDWTContext *c);
    
      void ff_dwt_init_x86(SnowDWTContext *c);
    
      #endif /* AVCODEC_DWT_H */

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Line	Branch	Exec	Source
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 <stddef.h>
25			#include <stdint.h>
26
27			#include "libavutil/attributes.h"
28
29			typedef struct MPVEncContext MPVEncContext;
30
31			typedef int DWTELEM;
32			typedef short IDWTELEM;
33
34			#define MAX_DECOMPOSITIONS 8
35
36			typedef struct DWTCompose {
37			IDWTELEM *b0;
38			IDWTELEM *b1;
39			IDWTELEM *b2;
40			IDWTELEM *b3;
41			int y;
42			} DWTCompose;
43
44			/** Used to minimize the amount of memory used in order to
45			* optimize cache performance. **/
46			typedef struct slice_buffer_s {
47			IDWTELEM **line; ///< For use by idwt and predict_slices.
48			IDWTELEM **data_stack; ///< Used for internal purposes.
49			int data_stack_top;
50			int line_count;
51			int line_width;
52			int data_count;
53			IDWTELEM *base_buffer; ///< Buffer that this structure is caching.
54			} slice_buffer;
55
56			struct SnowDWTContext;
57
58			typedef struct SnowDWTContext {
59			void (vertical_compose97i)(IDWTELEM b0, IDWTELEM b1, IDWTELEM b2,
60			IDWTELEM b3, IDWTELEM b4, IDWTELEM *b5,
61			int width);
62			void (horizontal_compose97i)(IDWTELEM b, IDWTELEM *temp, int width);
63			void (inner_add_yblock)(const uint8_t obmc, const int obmc_stride,
64			uint8_t **block, int b_w, int b_h, int src_x,
65			int src_y, int src_stride, slice_buffer *sb,
66			int add, uint8_t *dst8);
67			} SnowDWTContext;
68
69
70			#define DWT_97 0
71			#define DWT_53 1
72
73			#define liftS lift
74			#define W_AM 3
75			#define W_AO 0
76			#define W_AS 1
77
78			#undef liftS
79			#define W_BM 1
80			#define W_BO 8
81			#define W_BS 4
82
83			#define W_CM 1
84			#define W_CO 0
85			#define W_CS 0
86
87			#define W_DM 3
88			#define W_DO 4
89			#define W_DS 3
90
91			#define slice_buffer_get_line(slice_buf, line_num) \
92			((slice_buf)->line[line_num] ? (slice_buf)->line[line_num] \
93			: ff_slice_buffer_load_line((slice_buf), \
94			(line_num)))
95
96			/* C bits used by mmx/sse2/altivec */
97
98		248	static av_always_inline void snow_interleave_line_header(int i, int width, IDWTELEM low, IDWTELEM *high)
99			{
100		248	*i = width - 2;
101
102	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 248 times.	248	if (width & 1) {
103		✗	low[i + 1] = low[(i + 1)>>1];
104		✗	(*i)--;
105			}
106		248	}
107
108			static av_always_inline void snow_interleave_line_footer(int i, IDWTELEM low, const IDWTELEM *high)
109			{
110			for (; i >= 0; i -= 2) {
111			low[i + 1] = high[i >> 1];
112			low[i] = low[i >> 1];
113			}
114			}
115
116		744	static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, IDWTELEM dst, const IDWTELEM src, const IDWTELEM *ref, int width, int w, int lift_high, int mul, int add, int shift)
117			{
118	2/2 ✓ Branch 0 taken 4992 times. ✓ Branch 1 taken 744 times.	5736	for (; i < w; i++)
119		4992	dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
120
121	2/2 ✓ Branch 0 taken 496 times. ✓ Branch 1 taken 248 times.	744	if ((width ^ lift_high) & 1)
122		496	dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
123		744	}
124
125		248	static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM dst, const IDWTELEM src, const IDWTELEM *ref, int width, int w)
126			{
127	2/2 ✓ Branch 0 taken 1664 times. ✓ Branch 1 taken 248 times.	1912	for (; i < w; i++)
128		1664	dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
129
130	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 248 times.	248	if (width & 1)
131		✗	dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
132		248	}
133
134			int ff_slice_buffer_init(slice_buffer *buf, int line_count,
135			int max_allocated_lines, int line_width,
136			IDWTELEM *base_buffer);
137			void ff_slice_buffer_release(slice_buffer *buf, int line);
138			void ff_slice_buffer_flush(slice_buffer *buf);
139			void ff_slice_buffer_destroy(slice_buffer *buf);
140			IDWTELEM ff_slice_buffer_load_line(slice_buffer buf, int line);
141
142			void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
143			uint8_t **block, int b_w, int b_h, int src_x,
144			int src_y, int src_stride, slice_buffer *sb,
145			int add, uint8_t *dst8);
146
147			int ff_w53_32_c(MPVEncContext v, const uint8_t pix1, const uint8_t *pix2, ptrdiff_t line_size, int h);
148			int ff_w97_32_c(MPVEncContext v, const uint8_t pix1, const uint8_t *pix2, ptrdiff_t line_size, int h);
149
150			void ff_spatial_dwt(int buffer, int temp, int width, int height, int stride,
151			int type, int decomposition_count);
152
153			void ff_spatial_idwt_buffered_init(DWTCompose cs, slice_buffer sb, int width,
154			int height, int stride_line, int type,
155			int decomposition_count);
156			void ff_spatial_idwt_buffered_slice(SnowDWTContext dsp, DWTCompose cs,
157			slice_buffer slice_buf, IDWTELEM temp,
158			int width, int height, int stride_line,
159			int type, int decomposition_count, int y);
160			void ff_spatial_idwt(IDWTELEM buffer, IDWTELEM temp, int width, int height,
161			int stride, int type, int decomposition_count);
162
163			void ff_dwt_init(SnowDWTContext *c);
164			void ff_dwt_init_x86(SnowDWTContext *c);
165
166			#endif /* AVCODEC_DWT_H */
167

Function (Line)	Call count	Block coverage
snow_horizontal_compose_liftS_lead_out (line 125)	called 248 times, returned 248 times	83.0%
snow_horizontal_compose_lift_lead_out (line 116)	called 744 times, returned 744 times	100.0%
snow_interleave_line_header (line 98)	called 248 times, returned 248 times	67.0%