Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * Optimization of some functions from mpegvideo.c for armv5te | |
3 | * Copyright (c) 2007 Siarhei Siamashka <ssvb@users.sourceforge.net> | |
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 "libavutil/attributes.h" | |
23 | #include "libavutil/avassert.h" | |
24 | #include "libavcodec/avcodec.h" | |
25 | #include "libavcodec/mpegvideo.h" | |
26 | #include "mpegvideo_arm.h" | |
27 | ||
28 | void ff_dct_unquantize_h263_armv5te(int16_t *block, int qmul, int qadd, int count); | |
29 | ||
30 | #ifdef ENABLE_ARM_TESTS | |
31 | /** | |
32 | * h263 dequantizer supplementary function, it is performance critical and needs to | |
33 | * have optimized implementations for each architecture. Is also used as a reference | |
34 | * implementation in regression tests | |
35 | */ | |
36 | static inline void dct_unquantize_h263_helper_c(int16_t *block, int qmul, int qadd, int count) | |
37 | { | |
38 | int i, level; | |
39 | for (i = 0; i < count; i++) { | |
40 | level = block[i]; | |
41 | if (level) { | |
42 | if (level < 0) { | |
43 | level = level * qmul - qadd; | |
44 | } else { | |
45 | level = level * qmul + qadd; | |
46 | } | |
47 | block[i] = level; | |
48 | } | |
49 | } | |
50 | } | |
51 | #endif | |
52 | ||
53 | static void dct_unquantize_h263_intra_armv5te(MpegEncContext *s, | |
54 | int16_t *block, int n, int qscale) | |
55 | { | |
56 | int level, qmul, qadd; | |
57 | int nCoeffs; | |
58 | ||
59 | av_assert2(s->block_last_index[n]>=0); | |
60 | ||
61 | qmul = qscale << 1; | |
62 | ||
63 | if (!s->h263_aic) { | |
64 | if (n < 4) | |
65 | level = block[0] * s->y_dc_scale; | |
66 | else | |
67 | level = block[0] * s->c_dc_scale; | |
68 | qadd = (qscale - 1) | 1; | |
69 | }else{ | |
70 | qadd = 0; | |
71 | level = block[0]; | |
72 | } | |
73 | if(s->ac_pred) | |
74 | nCoeffs=63; | |
75 | else | |
76 | nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; | |
77 | ||
78 | ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1); | |
79 | block[0] = level; | |
80 | } | |
81 | ||
82 | static void dct_unquantize_h263_inter_armv5te(MpegEncContext *s, | |
83 | int16_t *block, int n, int qscale) | |
84 | { | |
85 | int qmul, qadd; | |
86 | int nCoeffs; | |
87 | ||
88 | av_assert2(s->block_last_index[n]>=0); | |
89 | ||
90 | qadd = (qscale - 1) | 1; | |
91 | qmul = qscale << 1; | |
92 | ||
93 | nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; | |
94 | ||
95 | ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1); | |
96 | } | |
97 | ||
98 | av_cold void ff_mpv_common_init_armv5te(MpegEncContext *s) | |
99 | { | |
100 | s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_armv5te; | |
101 | s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_armv5te; | |
102 | } |