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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Format Conversion Utils |
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| 3 | * Copyright (c) 2000, 2001 Fabrice Bellard |
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| 4 | * Copyright (c) 2002-2004 Michael Niedermayer |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #include "avcodec.h" |
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| 24 | #include "fmtconvert.h" |
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| 25 | #include "libavutil/common.h" |
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| 26 | |||
| 27 | static void int32_to_float_fmul_scalar_c(float *dst, const int32_t *src, |
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| 28 | float mul, int len) |
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| 29 | { |
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| 30 | int i; |
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| 31 | for(i=0; i |
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| 32 | dst[i] = src[i] * mul; |
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| 33 | } |
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| 34 | |||
| 35 | static void int32_to_float_fmul_array8_c(FmtConvertContext *c, float *dst, |
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| 36 | const int32_t *src, const float *mul, |
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| 37 | int len) |
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| 38 | { |
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| 39 | int i; |
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| 40 | for (i = 0; i < len; i += 8) |
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| 41 | c->int32_to_float_fmul_scalar(&dst[i], &src[i], *mul++, 8); |
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| 42 | } |
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| 43 | |||
| 44 | static av_always_inline int float_to_int16_one(const float *src){ |
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| 45 | return av_clip_int16(lrintf(*src)); |
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| 46 | } |
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| 47 | |||
| 48 | static void float_to_int16_c(int16_t *dst, const float *src, long len) |
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| 49 | { |
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| 50 | int i; |
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| 51 | for(i=0; i |
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| 52 | dst[i] = float_to_int16_one(src+i); |
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| 53 | } |
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| 54 | |||
| 55 | static void float_to_int16_interleave_c(int16_t *dst, const float **src, |
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| 56 | long len, int channels) |
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| 57 | { |
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| 58 | int i,j,c; |
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| 59 | if(channels==2){ |
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| 60 | for(i=0; i |
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| 61 | dst[2*i] = float_to_int16_one(src[0]+i); |
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| 62 | dst[2*i+1] = float_to_int16_one(src[1]+i); |
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| 63 | } |
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| 64 | }else{ |
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| 65 | for(c=0; c |
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| 66 | for(i=0, j=c; i |
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| 67 | dst[j] = float_to_int16_one(src[c]+i); |
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| 68 | } |
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| 69 | } |
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| 70 | |||
| 71 | void ff_float_interleave_c(float *dst, const float **src, unsigned int len, |
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| 72 | int channels) |
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| 73 | { |
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| 74 | int j, c; |
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| 75 | unsigned int i; |
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| 76 | if (channels == 2) { |
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| 77 | for (i = 0; i < len; i++) { |
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| 78 | dst[2*i] = src[0][i]; |
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| 79 | dst[2*i+1] = src[1][i]; |
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| 80 | } |
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| 81 | } else if (channels == 1 && len < INT_MAX / sizeof(float)) { |
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| 82 | memcpy(dst, src[0], len * sizeof(float)); |
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| 83 | } else { |
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| 84 | for (c = 0; c < channels; c++) |
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| 85 | for (i = 0, j = c; i < len; i++, j += channels) |
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| 86 | dst[j] = src[c][i]; |
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| 87 | } |
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| 88 | } |
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| 89 | |||
| 90 | av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx) |
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| 91 | { |
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| 92 | c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c; |
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| 93 | c->int32_to_float_fmul_array8 = int32_to_float_fmul_array8_c; |
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| 94 | c->float_to_int16 = float_to_int16_c; |
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| 95 | c->float_to_int16_interleave = float_to_int16_interleave_c; |
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| 96 | c->float_interleave = ff_float_interleave_c; |
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| 97 | |||
| 98 | if (ARCH_ARM) ff_fmt_convert_init_arm(c, avctx); |
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| 99 | if (ARCH_PPC) ff_fmt_convert_init_ppc(c, avctx); |
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| 100 | if (ARCH_X86) ff_fmt_convert_init_x86(c, avctx); |
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| 101 | if (HAVE_MIPSFPU) ff_fmt_convert_init_mips(c); |
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| 102 | } |
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| 103 | |||
| 104 | /* ffdshow custom code */ |
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| 105 | void float_interleave(float *dst, const float **src, long len, int channels) |
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| 106 | { |
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| 107 | int i,j,c; |
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| 108 | if(channels==2){ |
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| 109 | for(i=0; i |
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| 110 | dst[2*i] = src[0][i] / 32768.0f; |
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| 111 | dst[2*i+1] = src[1][i] / 32768.0f; |
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| 112 | } |
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| 113 | }else{ |
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| 114 | for(c=0; c |
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| 115 | for(i=0, j=c; i |
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| 116 | dst[j] = src[c][i] / 32768.0f; |
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| 117 | } |
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| 118 | } |
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| 119 | |||
| 120 | void float_interleave_noscale(float *dst, const float **src, long len, int channels) |
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| 121 | { |
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| 122 | int i,j,c; |
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| 123 | if(channels==2){ |
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| 124 | for(i=0; i |
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| 125 | dst[2*i] = src[0][i]; |
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| 126 | dst[2*i+1] = src[1][i]; |
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| 127 | } |
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| 128 | }else{ |
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| 129 | for(c=0; c |
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| 130 | for(i=0, j=c; i |
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| 131 | dst[j] = src[c][i]; |
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| 132 | } |
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| 133 | } |