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
|
/*
* Copyright 2003-2017 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 PCM_CONVERT_HXX
#define PCM_CONVERT_HXX
#include "check.h"
#include "FormatConverter.hxx"
#include "ChannelsConverter.hxx"
#include "GlueResampler.hxx"
#include "AudioFormat.hxx"
#ifdef ENABLE_DSD
#include "PcmDsd.hxx"
#endif
template<typename T> struct ConstBuffer;
/**
* This object is statically allocated (within another struct), and
* holds buffer allocations and the state for all kinds of PCM
* conversions.
*/
class PcmConvert {
#ifdef ENABLE_DSD
PcmDsd dsd;
#endif
GluePcmResampler resampler;
PcmFormatConverter format_converter;
PcmChannelsConverter channels_converter;
AudioFormat src_format, dest_format;
bool enable_resampler, enable_format, enable_channels;
public:
PcmConvert() noexcept;
~PcmConvert() noexcept;
/**
* Prepare the object. Call Close() when done.
*
* Throws std::runtime_error on error.
*/
void Open(AudioFormat _src_format, AudioFormat _dest_format);
/**
* Close the object after it was prepared with Open(). After
* that, it may be reused by calling Open() again.
*/
void Close() noexcept;
/**
* Reset the filter's state, e.g. drop/flush buffers.
*/
void Reset() noexcept;
/**
* Converts PCM data between two audio formats.
*
* Throws std::runtime_error on error.
*
* @param src the source PCM buffer
* @return the destination buffer
*/
ConstBuffer<void> Convert(ConstBuffer<void> src);
/**
* Flush pending data and return it. This should be called
* repepatedly until it returns nullptr.
*/
ConstBuffer<void> Flush();
};
void
pcm_convert_global_init();
#endif
|
