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#ifndef AVCODEC_FMTCONVERT_H
24#define AVCODEC_FMTCONVERT_H
25
26#include "avcodec.h"
27
28typedef struct FmtConvertContext {
29    /**
30     * Convert an array of int32_t to float and multiply by a float value.
31     * @param dst destination array of float.
32     *            constraints: 16-byte aligned
33     * @param src source array of int32_t.
34     *            constraints: 16-byte aligned
35     * @param len number of elements to convert.
36     *            constraints: multiple of 8
37     */
38    void (*int32_to_float_fmul_scalar)(float *dst, const int32_t *src,
39                                       float mul, int len);
40
41    /**
42     * Convert an array of int32_t to float and multiply by a float value from another array,
43     * stepping along the float array once for each 8 integers.
44     * @param c   pointer to FmtConvertContext.
45     * @param dst destination array of float.
46     *            constraints: 16-byte aligned
47     * @param src source array of int32_t.
48     *            constraints: 16-byte aligned
49     * @param mul source array of float multipliers.
50     * @param len number of elements to convert.
51     *            constraints: multiple of 8
52     */
53    void (*int32_to_float_fmul_array8)(struct FmtConvertContext *c,
54                                       float *dst, const int32_t *src,
55                                       const float *mul, int len);
56
57    /**
58     * Convert an array of float to an array of int16_t.
59     *
60     * Convert floats from in the range [-32768.0,32767.0] to ints
61     * without rescaling
62     *
63     * @param dst destination array of int16_t.
64     *            constraints: 16-byte aligned
65     * @param src source array of float.
66     *            constraints: 16-byte aligned
67     * @param len number of elements to convert.
68     *            constraints: multiple of 8
69     */
70    void (*float_to_int16)(int16_t *dst, const float *src, long len);
71
72    /**
73     * Convert multiple arrays of float to an interleaved array of int16_t.
74     *
75     * Convert floats from in the range [-32768.0,32767.0] to ints
76     * without rescaling
77     *
78     * @param dst destination array of interleaved int16_t.
79     *            constraints: 16-byte aligned
80     * @param src source array of float arrays, one for each channel.
81     *            constraints: 16-byte aligned
82     * @param len number of elements to convert.
83     *            constraints: multiple of 8
84     * @param channels number of channels
85     */
86    void (*float_to_int16_interleave)(int16_t *dst, const float **src,
87                                      long len, int channels);
88
89    /**
90     * Convert multiple arrays of float to an array of interleaved float.
91     *
92     * @param dst destination array of interleaved float.
93     *            constraints: 16-byte aligned
94     * @param src source array of float arrays, one for each channel.
95     *            constraints: 16-byte aligned
96     * @param len number of elements to convert.
97     *            constraints: multiple of 8
98     * @param channels number of channels
99     */
100    void (*float_interleave)(float *dst, const float **src, unsigned int len,
101                             int channels);
102} FmtConvertContext;
103
104void ff_float_interleave_c(float *dst, const float **src, unsigned int len,
105                           int channels);
106
107void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);
108
109void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
110void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx);
111void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);
112void ff_fmt_convert_init_mips(FmtConvertContext *c);
113
114/* ffdshow custom code */
115void float_interleave(float *dst, const float **src, long len, int channels);
116void float_interleave_noscale(float *dst, const float **src, long len, int channels);
117
118#endif /* AVCODEC_FMTCONVERT_H */
119