1 /*
2  * Copyright 2003-2021 The Music Player Daemon Project
3  * http://www.musicpd.org
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License along
16  * with this program; if not, write to the Free Software Foundation, Inc.,
17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */
19 
20 #ifndef MPD_DECODER_DSDLIB_HXX
21 #define MPD_DECODER_DSDLIB_HXX
22 
23 #include "util/ByteOrder.hxx"
24 #include "input/Offset.hxx"
25 
26 #include <cstdint>
27 
28 class TagHandler;
29 class DecoderClient;
30 class InputStream;
31 
32 struct DsdId {
33 	char value[4];
34 
35 	[[gnu::pure]]
36 	bool Equals(const char *s) const noexcept;
37 };
38 
39 class DsdUint64 {
40 	uint32_t lo;
41 	uint32_t hi;
42 
43 public:
Read() const44 	constexpr uint64_t Read() const {
45 		return (uint64_t(FromLE32(hi)) << 32) |
46 			uint64_t(FromLE32(lo));
47 	}
48 };
49 
50 class DffDsdUint64 {
51 	uint32_t hi;
52 	uint32_t lo;
53 
54 public:
Read() const55 	constexpr uint64_t Read() const {
56 		return (uint64_t(FromBE32(hi)) << 32) |
57 			uint64_t(FromBE32(lo));
58 	}
59 };
60 
61 bool
62 dsdlib_skip_to(DecoderClient *client, InputStream &is,
63 	       offset_type offset);
64 
65 bool
66 dsdlib_skip(DecoderClient *client, InputStream &is,
67 	    offset_type delta);
68 
69 /**
70  * Check if the sample frequency is a valid DSD frequency.
71  **/
72 [[gnu::const]]
73 bool
74 dsdlib_valid_freq(uint32_t samplefreq) noexcept;
75 
76 /**
77  * Add tags from ID3 tag. All tags commonly found in the ID3 tags of
78  * DSF and DSDIFF files are imported
79  */
80 void
81 dsdlib_tag_id3(InputStream &is, TagHandler &handler,
82 	       offset_type tagoffset);
83 
84 #endif
85