FFmpeg
fdctdsp.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
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_FDCTDSP_H
20 #define AVCODEC_FDCTDSP_H
21 
22 #include <stdint.h>
23 
25 
26 struct AVCodecContext;
27 
28 typedef struct FDCTDSPContext {
29  void (*fdct)(int16_t *block /* align 16 */);
30  void (*fdct248)(int16_t *block /* align 16 */);
32 
34 void ff_fdctdsp_init(FDCTDSPContext *c, struct AVCodecContext *avctx);
36  unsigned high_bit_depth);
38  unsigned high_bit_depth);
39 
40 void ff_fdct_ifast(int16_t *data);
41 void ff_fdct_ifast248(int16_t *data);
42 void ff_jpeg_fdct_islow_8(int16_t *data);
43 void ff_jpeg_fdct_islow_10(int16_t *data);
44 void ff_fdct248_islow_8(int16_t *data);
45 void ff_fdct248_islow_10(int16_t *data);
47 
48 #endif /* AVCODEC_FDCTDSP_H */
FF_VISIBILITY_PUSH_HIDDEN
#define FF_VISIBILITY_PUSH_HIDDEN
Definition: attributes_internal.h:30
FDCTDSPContext::fdct248
void(* fdct248)(int16_t *block)
Definition: fdctdsp.h:30
ff_fdctdsp_init_x86
void ff_fdctdsp_init_x86(FDCTDSPContext *c, struct AVCodecContext *avctx, unsigned high_bit_depth)
Definition: fdctdsp_init.c:26
data
const char data[16]
Definition: mxf.c:148
ff_fdct_ifast248
void ff_fdct_ifast248(int16_t *data)
Definition: jfdctfst.c:273
FDCTDSPContext
Definition: fdctdsp.h:28
attributes_internal.h
c
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
ff_fdct248_islow_8
void ff_fdct248_islow_8(int16_t *data)
FF_VISIBILITY_POP_HIDDEN
#define FF_VISIBILITY_POP_HIDDEN
Definition: attributes_internal.h:31
ff_jpeg_fdct_islow_8
void ff_jpeg_fdct_islow_8(int16_t *data)
ff_jpeg_fdct_islow_10
void ff_jpeg_fdct_islow_10(int16_t *data)
ff_fdct_ifast
void ff_fdct_ifast(int16_t *data)
Definition: jfdctfst.c:207
AVCodecContext
main external API structure.
Definition: avcodec.h:445
ff_fdctdsp_init_ppc
void ff_fdctdsp_init_ppc(FDCTDSPContext *c, struct AVCodecContext *avctx, unsigned high_bit_depth)
Definition: fdctdsp.c:465
FDCTDSPContext::fdct
void(* fdct)(int16_t *block)
Definition: fdctdsp.h:29
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
ff_fdct248_islow_10
void ff_fdct248_islow_10(int16_t *data)
ff_fdctdsp_init
FF_VISIBILITY_PUSH_HIDDEN void ff_fdctdsp_init(FDCTDSPContext *c, struct AVCodecContext *avctx)
Definition: fdctdsp.c:25