]> iEval git - fdkaac.git/blame - src/lpcm.h
address minor lintian
[fdkaac.git] / src / lpcm.h
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48e2f01c 1/*
2 * Copyright (C) 2013 nu774
3 * For conditions of distribution and use, see copyright notice in COPYING
4 */
5#ifndef LPCM_H
6#define LPCM_H
7
8enum pcm_type {
9 PCM_TYPE_UNKNOWN = 0,
10 PCM_TYPE_SINT = 1,
11 PCM_TYPE_UINT = 2,
12 PCM_TYPE_FLOAT = 4,
13 PCM_TYPE_SINT_BE = (8|1),
14 PCM_TYPE_UINT_BE = (8|2),
15 PCM_TYPE_FLOAT_BE = (8|4),
16};
17
18typedef struct pcm_sample_description_t {
19 enum pcm_type sample_type;
20 uint32_t sample_rate;
21 uint8_t bits_per_channel;
22 uint8_t bytes_per_frame;
23 uint8_t channels_per_frame;
24 uint32_t channel_mask;
25} pcm_sample_description_t;
26
27#define PCM_IS_SINT(desc) ((desc)->sample_type & 1)
28#define PCM_IS_UINT(desc) ((desc)->sample_type & 2)
29#define PCM_IS_FLOAT(desc) ((desc)->sample_type & 4)
30#define PCM_IS_BIG_ENDIAN(desc) ((desc)->sample_type & 8)
31#define PCM_BYTES_PER_CHANNEL(desc) \
32 ((desc)->bytes_per_frame / (desc)->channels_per_frame)
33
4d48b091 34#if defined(_MSC_VER) && _MSC_VER < 1800
35# ifdef _M_IX86
36static inline int lrint(double x)
37{
38 int n;
39 _asm {
40 fld x
41 fistp n
42 }
43 return n;
44}
45# else
46# include <emmintrin.h>
47static inline int lrint(double x)
48{
49 return _mm_cvtsd_si32(_mm_load_sd(&x));
50}
51# endif
52#endif
53
54static
55inline double pcm_clip(double n, double min_value, double max_value)
56{
57 if (n < min_value)
58 return min_value;
59 else if (n > max_value)
60 return max_value;
61 return n;
62}
63
48e2f01c 64#endif
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