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1 | /* |
2 | * Copyright (c) 2010 Mans Rullgard | |
3 | * Copyright (c) 2014 James Yu <james.yu@linaro.org> | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <arm_neon.h> | |
23 | ||
24 | #include "config.h" | |
25 | ||
26 | #include "libavutil/cpu.h" | |
27 | #if ARCH_AARCH64 | |
28 | # include "libavutil/aarch64/cpu.h" | |
29 | #elif ARCH_ARM | |
30 | # include "libavutil/arm/cpu.h" | |
31 | #endif | |
32 | ||
33 | #include "libavcodec/mpegvideo.h" | |
34 | ||
35 | static void inline ff_dct_unquantize_h263_neon(int qscale, int qadd, int nCoeffs, | |
36 | int16_t *block) | |
37 | { | |
38 | int16x8_t q0s16, q2s16, q3s16, q8s16, q10s16, q11s16, q13s16; | |
39 | int16x8_t q14s16, q15s16, qzs16; | |
40 | int16x4_t d0s16, d2s16, d3s16, dzs16; | |
41 | uint16x8_t q1u16, q9u16; | |
42 | uint16x4_t d1u16; | |
43 | ||
44 | dzs16 = vdup_n_s16(0); | |
45 | qzs16 = vdupq_n_s16(0); | |
46 | ||
47 | q15s16 = vdupq_n_s16(qscale << 1); | |
48 | q14s16 = vdupq_n_s16(qadd); | |
49 | q13s16 = vnegq_s16(q14s16); | |
50 | ||
51 | if (nCoeffs > 4) { | |
52 | for (; nCoeffs > 8; nCoeffs -= 16, block += 16) { | |
53 | q0s16 = vld1q_s16(block); | |
54 | q3s16 = vreinterpretq_s16_u16(vcltq_s16(q0s16, qzs16)); | |
55 | q8s16 = vld1q_s16(block + 8); | |
56 | q1u16 = vceqq_s16(q0s16, qzs16); | |
57 | q2s16 = vmulq_s16(q0s16, q15s16); | |
58 | q11s16 = vreinterpretq_s16_u16(vcltq_s16(q8s16, qzs16)); | |
59 | q10s16 = vmulq_s16(q8s16, q15s16); | |
60 | q3s16 = vbslq_s16(vreinterpretq_u16_s16(q3s16), q13s16, q14s16); | |
61 | q11s16 = vbslq_s16(vreinterpretq_u16_s16(q11s16), q13s16, q14s16); | |
62 | q2s16 = vaddq_s16(q2s16, q3s16); | |
63 | q9u16 = vceqq_s16(q8s16, qzs16); | |
64 | q10s16 = vaddq_s16(q10s16, q11s16); | |
65 | q0s16 = vbslq_s16(q1u16, q0s16, q2s16); | |
66 | q8s16 = vbslq_s16(q9u16, q8s16, q10s16); | |
67 | vst1q_s16(block, q0s16); | |
68 | vst1q_s16(block + 8, q8s16); | |
69 | } | |
70 | } | |
71 | if (nCoeffs <= 0) | |
72 | return; | |
73 | ||
74 | d0s16 = vld1_s16(block); | |
75 | d3s16 = vreinterpret_s16_u16(vclt_s16(d0s16, dzs16)); | |
76 | d1u16 = vceq_s16(d0s16, dzs16); | |
77 | d2s16 = vmul_s16(d0s16, vget_high_s16(q15s16)); | |
78 | d3s16 = vbsl_s16(vreinterpret_u16_s16(d3s16), | |
79 | vget_high_s16(q13s16), vget_high_s16(q14s16)); | |
80 | d2s16 = vadd_s16(d2s16, d3s16); | |
81 | d0s16 = vbsl_s16(d1u16, d0s16, d2s16); | |
82 | vst1_s16(block, d0s16); | |
83 | } | |
84 | ||
85 | static void dct_unquantize_h263_inter_neon(MpegEncContext *s, int16_t *block, | |
86 | int n, int qscale) | |
87 | { | |
88 | int nCoeffs = s->inter_scantable.raster_end[s->block_last_index[n]]; | |
89 | int qadd = (qscale - 1) | 1; | |
90 | ||
91 | ff_dct_unquantize_h263_neon(qscale, qadd, nCoeffs + 1, block); | |
92 | } | |
93 | ||
94 | static void dct_unquantize_h263_intra_neon(MpegEncContext *s, int16_t *block, | |
95 | int n, int qscale) | |
96 | { | |
97 | int qadd; | |
98 | int nCoeffs, blk0; | |
99 | ||
100 | if (!s->h263_aic) { | |
101 | if (n < 4) | |
102 | block[0] *= s->y_dc_scale; | |
103 | else | |
104 | block[0] *= s->c_dc_scale; | |
105 | qadd = (qscale - 1) | 1; | |
106 | } else { | |
107 | qadd = 0; | |
108 | } | |
109 | ||
110 | if (s->ac_pred) { | |
111 | nCoeffs = 63; | |
112 | } else { | |
113 | nCoeffs = s->inter_scantable.raster_end[s->block_last_index[n]]; | |
114 | if (nCoeffs <= 0) | |
115 | return; | |
116 | } | |
117 | ||
118 | blk0 = block[0]; | |
119 | ||
120 | ff_dct_unquantize_h263_neon(qscale, qadd, nCoeffs + 1, block); | |
121 | ||
122 | block[0] = blk0; | |
123 | } | |
124 | ||
125 | ||
126 | av_cold void ff_mpv_common_init_neon(MpegEncContext *s) | |
127 | { | |
128 | int cpu_flags = av_get_cpu_flags(); | |
129 | ||
130 | if (have_neon(cpu_flags)) { | |
131 | s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_neon; | |
132 | s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_neon; | |
133 | } | |
134 | } |