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1 | /* |
2 | * Format Conversion Utils | |
3 | * Copyright (c) 2000, 2001 Fabrice Bellard | |
4 | * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include "avcodec.h" | |
24 | #include "fmtconvert.h" | |
25 | #include "libavutil/common.h" | |
26 | ||
27 | static void int32_to_float_fmul_scalar_c(float *dst, const int32_t *src, | |
28 | float mul, int len) | |
29 | { | |
30 | int i; | |
31 | for(i=0; i<len; i++) | |
32 | dst[i] = src[i] * mul; | |
33 | } | |
34 | ||
35 | static void int32_to_float_fmul_array8_c(FmtConvertContext *c, float *dst, | |
36 | const int32_t *src, const float *mul, | |
37 | int len) | |
38 | { | |
39 | int i; | |
40 | for (i = 0; i < len; i += 8) | |
41 | c->int32_to_float_fmul_scalar(&dst[i], &src[i], *mul++, 8); | |
42 | } | |
43 | ||
44 | static av_always_inline int float_to_int16_one(const float *src){ | |
45 | return av_clip_int16(lrintf(*src)); | |
46 | } | |
47 | ||
48 | static void float_to_int16_c(int16_t *dst, const float *src, long len) | |
49 | { | |
50 | int i; | |
51 | for(i=0; i<len; i++) | |
52 | dst[i] = float_to_int16_one(src+i); | |
53 | } | |
54 | ||
55 | static void float_to_int16_interleave_c(int16_t *dst, const float **src, | |
56 | long len, int channels) | |
57 | { | |
58 | int i,j,c; | |
59 | if(channels==2){ | |
60 | for(i=0; i<len; i++){ | |
61 | dst[2*i] = float_to_int16_one(src[0]+i); | |
62 | dst[2*i+1] = float_to_int16_one(src[1]+i); | |
63 | } | |
64 | }else{ | |
65 | for(c=0; c<channels; c++) | |
66 | for(i=0, j=c; i<len; i++, j+=channels) | |
67 | dst[j] = float_to_int16_one(src[c]+i); | |
68 | } | |
69 | } | |
70 | ||
71 | void ff_float_interleave_c(float *dst, const float **src, unsigned int len, | |
72 | int channels) | |
73 | { | |
74 | int j, c; | |
75 | unsigned int i; | |
76 | if (channels == 2) { | |
77 | for (i = 0; i < len; i++) { | |
78 | dst[2*i] = src[0][i]; | |
79 | dst[2*i+1] = src[1][i]; | |
80 | } | |
81 | } else if (channels == 1 && len < INT_MAX / sizeof(float)) { | |
82 | memcpy(dst, src[0], len * sizeof(float)); | |
83 | } else { | |
84 | for (c = 0; c < channels; c++) | |
85 | for (i = 0, j = c; i < len; i++, j += channels) | |
86 | dst[j] = src[c][i]; | |
87 | } | |
88 | } | |
89 | ||
90 | av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx) | |
91 | { | |
92 | c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c; | |
93 | c->int32_to_float_fmul_array8 = int32_to_float_fmul_array8_c; | |
94 | c->float_to_int16 = float_to_int16_c; | |
95 | c->float_to_int16_interleave = float_to_int16_interleave_c; | |
96 | c->float_interleave = ff_float_interleave_c; | |
97 | ||
98 | if (ARCH_ARM) ff_fmt_convert_init_arm(c, avctx); | |
99 | if (ARCH_PPC) ff_fmt_convert_init_ppc(c, avctx); | |
100 | if (ARCH_X86) ff_fmt_convert_init_x86(c, avctx); | |
101 | if (HAVE_MIPSFPU) ff_fmt_convert_init_mips(c); | |
102 | } | |
103 | ||
104 | /* ffdshow custom code */ | |
105 | void float_interleave(float *dst, const float **src, long len, int channels) | |
106 | { | |
107 | int i,j,c; | |
108 | if(channels==2){ | |
109 | for(i=0; i<len; i++){ | |
110 | dst[2*i] = src[0][i] / 32768.0f; | |
111 | dst[2*i+1] = src[1][i] / 32768.0f; | |
112 | } | |
113 | }else{ | |
114 | for(c=0; c<channels; c++) | |
115 | for(i=0, j=c; i<len; i++, j+=channels) | |
116 | dst[j] = src[c][i] / 32768.0f; | |
117 | } | |
118 | } | |
119 | ||
120 | void float_interleave_noscale(float *dst, const float **src, long len, int channels) | |
121 | { | |
122 | int i,j,c; | |
123 | if(channels==2){ | |
124 | for(i=0; i<len; i++){ | |
125 | dst[2*i] = src[0][i]; | |
126 | dst[2*i+1] = src[1][i]; | |
127 | } | |
128 | }else{ | |
129 | for(c=0; c<channels; c++) | |
130 | for(i=0, j=c; i<len; i++, j+=channels) | |
131 | dst[j] = src[c][i]; | |
132 | } | |
133 | } |