FFmpeg
mpegvideo_arm.c
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1 /*
2  * Copyright (c) 2002 Michael Niedermayer
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 #include <assert.h>
22 
23 #include "libavutil/attributes.h"
24 #include "libavutil/arm/cpu.h"
25 #include "libavcodec/avcodec.h"
26 #include "libavcodec/mpegvideo.h"
27 #include "mpegvideo_arm.h"
28 #include "asm-offsets.h"
29 
30 #if HAVE_NEON
31 #define CHECK_OFFSET(s, m, o) \
32  static_assert(offsetof(s, m) == o, \
33  "Hardcoded ASM offset of " #s " field " #o " needs to be updated.");
34 CHECK_OFFSET(MpegEncContext, y_dc_scale, Y_DC_SCALE);
35 CHECK_OFFSET(MpegEncContext, c_dc_scale, C_DC_SCALE);
36 CHECK_OFFSET(MpegEncContext, ac_pred, AC_PRED);
37 CHECK_OFFSET(MpegEncContext, block_last_index, BLOCK_LAST_INDEX);
38 CHECK_OFFSET(MpegEncContext, inter_scantable.raster_end,
40 CHECK_OFFSET(MpegEncContext, h263_aic, H263_AIC);
41 #endif
42 
44  int n, int qscale);
46  int n, int qscale);
47 
49 {
51 
54 
55  if (have_neon(cpu_flags)) {
56  s->dct_unquantize_h263_intra = ff_dct_unquantize_h263_intra_neon;
57  s->dct_unquantize_h263_inter = ff_dct_unquantize_h263_inter_neon;
58  }
59 }
C_DC_SCALE
#define C_DC_SCALE
Definition: asm-offsets.h:26
ff_dct_unquantize_h263_intra_neon
void ff_dct_unquantize_h263_intra_neon(MpegEncContext *s, int16_t *block, int n, int qscale)
ff_mpv_common_init_arm
av_cold void ff_mpv_common_init_arm(MpegEncContext *s)
Definition: mpegvideo_arm.c:48
mpegvideo.h
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:107
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:56
H263_AIC
#define H263_AIC
Definition: asm-offsets.h:29
av_cold
#define av_cold
Definition: attributes.h:90
Y_DC_SCALE
#define Y_DC_SCALE
Definition: asm-offsets.h:25
s
#define s(width, name)
Definition: cbs_vp9.c:198
have_armv5te
#define have_armv5te(flags)
Definition: cpu.h:25
ff_mpv_common_init_armv5te
void ff_mpv_common_init_armv5te(MpegEncContext *s)
Definition: mpegvideo_armv5te.c:98
AC_PRED
#define AC_PRED
Definition: asm-offsets.h:27
ff_dct_unquantize_h263_inter_neon
void ff_dct_unquantize_h263_inter_neon(MpegEncContext *s, int16_t *block, int n, int qscale)
cpu.h
BLOCK_LAST_INDEX
#define BLOCK_LAST_INDEX
Definition: asm-offsets.h:28
have_neon
#define have_neon(flags)
Definition: cpu.h:26
attributes.h
avcodec.h
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
asm-offsets.h
INTER_SCANTAB_RASTER_END
#define INTER_SCANTAB_RASTER_END
Definition: asm-offsets.h:30
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:73
mpegvideo_arm.h