1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_PCM_RESAMPLE_HXX
#define MPD_PCM_RESAMPLE_HXX
#include "check.h"
#include "PcmBuffer.hxx"
#include "gerror.h"
#include <stdint.h>
#include <stddef.h>
#ifdef HAVE_LIBSAMPLERATE
#include <samplerate.h>
#endif
/**
* This object is statically allocated (within another struct), and
* holds buffer allocations and the state for the resampler.
*/
struct PcmResampler {
#ifdef HAVE_LIBSAMPLERATE
SRC_STATE *state;
SRC_DATA data;
PcmBuffer in, out;
struct {
unsigned src_rate;
unsigned dest_rate;
unsigned channels;
} prev;
int error;
#endif
PcmBuffer buffer;
PcmResampler();
~PcmResampler();
/**
* @see pcm_convert_reset()
*/
void Reset();
/**
* Resamples 32 bit float data.
*
* @param channels the number of channels
* @param src_rate the source sample rate
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_rate the requested destination sample rate
* @param dest_size_r returns the number of bytes of the destination buffer
* @return the destination buffer
*/
const float *ResampleFloat(unsigned channels, unsigned src_rate,
const float *src_buffer, size_t src_size,
unsigned dest_rate, size_t *dest_size_r,
GError **error_r);
/**
* Resamples 16 bit PCM data.
*
* @param channels the number of channels
* @param src_rate the source sample rate
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_rate the requested destination sample rate
* @param dest_size_r returns the number of bytes of the destination buffer
* @return the destination buffer
*/
const int16_t *Resample16(unsigned channels, unsigned src_rate,
const int16_t *src_buffer, size_t src_size,
unsigned dest_rate, size_t *dest_size_r,
GError **error_r);
/**
* Resamples 32 bit PCM data.
*
* @param channels the number of channels
* @param src_rate the source sample rate
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_rate the requested destination sample rate
* @param dest_size_r returns the number of bytes of the destination buffer
* @return the destination buffer
*/
const int32_t *Resample32(unsigned channels, unsigned src_rate,
const int32_t *src_buffer, size_t src_size,
unsigned dest_rate, size_t *dest_size_r,
GError **error_r);
/**
* Resamples 24 bit PCM data.
*
* @param channels the number of channels
* @param src_rate the source sample rate
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_rate the requested destination sample rate
* @param dest_size_r returns the number of bytes of the destination buffer
* @return the destination buffer
*/
const int32_t *Resample24(unsigned channels, unsigned src_rate,
const int32_t *src_buffer, size_t src_size,
unsigned dest_rate, size_t *dest_size_r,
GError **error_r)
{
/* reuse the 32 bit code - the resampler code doesn't care if
the upper 8 bits are actually used */
return Resample32(channels, src_rate, src_buffer, src_size,
dest_rate, dest_size_r, error_r);
}
};
bool
pcm_resample_global_init(GError **error_r);
#endif
|
