FFmpeg: libavcodec/svq1encdsp.h Source File

FFmpeg

[フレーム]

libavcodec

svq1encdsp.h

Go to the documentation of this file.

1 /*

2 * SVQ1 encoder DSP

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 */

21 #ifndef AVCODEC_SVQ1ENCDSP_H

22 #define AVCODEC_SVQ1ENCDSP_H

24 #include <stdint.h>

26 #include "config.h"

28 typedef struct SVQ1EncDSPContext {

29 int (*ssd_int8_vs_int16)(const int8_t *pix1, const int16_t *pix2,

30 intptr_t size);

31 } SVQ1EncDSPContext;

33 void ff_svq1enc_init_ppc(SVQ1EncDSPContext *c);

34 void ff_svq1enc_init_riscv(SVQ1EncDSPContext *c);

35 void ff_svq1enc_init_x86(SVQ1EncDSPContext *c);

37 static int ssd_int8_vs_int16_c(const int8_t *pix1, const int16_t *pix2,

38 intptr_t size)

39 {

40 int score = 0;

42 for (intptr_t i = 0; i < size; i++)

43 score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);

44 return score;

45 }

47 static inline void ff_svq1enc_init(SVQ1EncDSPContext *c)

48 {

49 c->ssd_int8_vs_int16 = ssd_int8_vs_int16_c;

51 #if ARCH_PPC

52 ff_svq1enc_init_ppc(c);

53 #elif ARCH_RISCV

54 ff_svq1enc_init_riscv(c);

55 #elif ARCH_X86

56 ff_svq1enc_init_x86(c);

57 #endif

58 }

60 #endif /* AVCODEC_SVQ1ENCDSP_H */

SVQ1EncDSPContext::ssd_int8_vs_int16

int(* ssd_int8_vs_int16)(const int8_t *pix1, const int16_t *pix2, intptr_t size)

Definition: svq1encdsp.h:29

ssd_int8_vs_int16_c

static int ssd_int8_vs_int16_c(const int8_t *pix1, const int16_t *pix2, intptr_t size)

Definition: svq1encdsp.h:37

ff_svq1enc_init

static void ff_svq1enc_init(SVQ1EncDSPContext *c)

Definition: svq1encdsp.h:47

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

size

int size

Definition: twinvq_data.h:10344

#define i(width, name, range_min, range_max)

Definition: cbs_h2645.c:255

ff_svq1enc_init_x86

void ff_svq1enc_init_x86(SVQ1EncDSPContext *c)

Definition: svq1enc_init.c:30

ff_svq1enc_init_riscv

void ff_svq1enc_init_riscv(SVQ1EncDSPContext *c)

Definition: svqenc_init.c:30