FFmpeg
vp3dsp.h
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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
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8  *
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11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
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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_VP3DSP_H
20 #define AVCODEC_VP3DSP_H
21 
22 #include <stddef.h>
23 #include <stdint.h>
24 
25 typedef struct VP3DSPContext {
26  /**
27  * Copy 8xH pixels from source to destination buffer using a bilinear
28  * filter with no rounding (i.e. *dst = (*a + *b) >> 1).
29  *
30  * @param dst destination buffer, aligned by 8
31  * @param a first source buffer, no alignment
32  * @param b second source buffer, no alignment
33  * @param stride distance between two lines in source/dest buffers
34  * @param h height
35  */
37  const uint8_t *a,
38  const uint8_t *b,
39  ptrdiff_t stride, int h);
40 
41  void (*idct_put)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
42  void (*idct_add)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
43  void (*idct_dc_add)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
44  void (*v_loop_filter)(uint8_t *src, ptrdiff_t stride, int *bounding_values);
45  void (*h_loop_filter)(uint8_t *src, ptrdiff_t stride, int *bounding_values);
47 
48 void ff_vp3dsp_v_loop_filter_12(uint8_t *first_pixel, ptrdiff_t stride, int *bounding_values);
49 void ff_vp3dsp_h_loop_filter_12(uint8_t *first_pixel, ptrdiff_t stride, int *bounding_values);
50 
51 void ff_vp3dsp_idct10_put(uint8_t *dest, ptrdiff_t stride, int16_t *block);
52 void ff_vp3dsp_idct10_add(uint8_t *dest, ptrdiff_t stride, int16_t *block);
53 
59 
60 void ff_vp3dsp_set_bounding_values(int * bound_values_array, int filter_limit);
61 
62 #endif /* AVCODEC_VP3DSP_H */
void(* put_no_rnd_pixels_l2)(uint8_t *dst, const uint8_t *a, const uint8_t *b, ptrdiff_t stride, int h)
Copy 8xH pixels from source to destination buffer using a bilinear filter with no rounding (i...
Definition: vp3dsp.h:36
void ff_vp3dsp_init_mips(VP3DSPContext *c, int flags)
void ff_vp3dsp_idct10_put(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition: vp3dsp.c:338
void(* v_loop_filter)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
Definition: vp3dsp.h:44
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
#define src
Definition: vp8dsp.c:254
void ff_vp3dsp_init_ppc(VP3DSPContext *c, int flags)
The exact code depends on how similar the blocks are and how related they are to the block
uint8_t
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
void(* idct_add)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition: vp3dsp.h:42
void(* h_loop_filter)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
Definition: vp3dsp.h:45
void ff_vp3dsp_idct10_add(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition: vp3dsp.c:344
#define b
Definition: input.c:41
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
void ff_vp3dsp_h_loop_filter_12(uint8_t *first_pixel, ptrdiff_t stride, int *bounding_values)
void(* idct_dc_add)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition: vp3dsp.h:43
void ff_vp3dsp_init(VP3DSPContext *c, int flags)
Definition: vp3dsp.c:445
void ff_vp3dsp_init_x86(VP3DSPContext *c, int flags)
Definition: vp3dsp_init.c:46
void ff_vp3dsp_init_arm(VP3DSPContext *c, int flags)
#define flags(name, subs,...)
Definition: cbs_av1.c:561
void ff_vp3dsp_v_loop_filter_12(uint8_t *first_pixel, ptrdiff_t stride, int *bounding_values)
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
void(* idct_put)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition: vp3dsp.h:41
#define stride
void ff_vp3dsp_set_bounding_values(int *bound_values_array, int filter_limit)
Definition: vp3dsp.c:473