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1 | /* | |
2 | * Copyright (C) 2013 nu774 | |
3 | * For conditions of distribution and use, see copyright notice in COPYING | |
4 | */ | |
5 | #ifndef PCM_READER_H | |
6 | #define PCM_READER_H | |
7 | ||
8 | #include "lpcm.h" | |
9 | #include "metadata.h" | |
10 | ||
11 | typedef struct pcm_reader_t pcm_reader_t; | |
12 | ||
13 | typedef struct pcm_reader_vtbl_t { | |
14 | const pcm_sample_description_t *(*get_format)(pcm_reader_t *); | |
15 | int64_t (*get_length)(pcm_reader_t *); | |
16 | int64_t (*get_position)(pcm_reader_t *); | |
17 | int (*read_frames)(pcm_reader_t *, void *, unsigned); | |
18 | void (*teardown)(pcm_reader_t **); | |
19 | } pcm_reader_vtbl_t; | |
20 | ||
21 | struct pcm_reader_t { | |
22 | pcm_reader_vtbl_t *vtbl; | |
23 | }; | |
24 | ||
25 | typedef int (*pcm_read_callback)(void *cookie, void *data, uint32_t count); | |
26 | typedef int (*pcm_seek_callback)(void *cookie, int64_t off, int whence); | |
27 | typedef int64_t (*pcm_tell_callback)(void *cookie); | |
28 | ||
29 | typedef struct pcm_io_vtbl_t { | |
30 | pcm_read_callback read; | |
31 | pcm_seek_callback seek; | |
32 | pcm_tell_callback tell; | |
33 | } pcm_io_vtbl_t; | |
34 | ||
35 | typedef struct pcm_io_context_t { | |
36 | pcm_io_vtbl_t *vtbl; | |
37 | void *cookie; | |
38 | } pcm_io_context_t; | |
39 | ||
40 | static inline | |
41 | const pcm_sample_description_t *pcm_get_format(pcm_reader_t *r) | |
42 | { | |
43 | return r->vtbl->get_format(r); | |
44 | } | |
45 | ||
46 | static inline | |
47 | int64_t pcm_get_length(pcm_reader_t *r) | |
48 | { | |
49 | return r->vtbl->get_length(r); | |
50 | } | |
51 | ||
52 | static inline | |
53 | int64_t pcm_get_position(pcm_reader_t *r) | |
54 | { | |
55 | return r->vtbl->get_position(r); | |
56 | } | |
57 | ||
58 | int pcm_read_frames(pcm_reader_t *r, void *data, unsigned nframes); | |
59 | ||
60 | static inline | |
61 | void pcm_teardown(pcm_reader_t **r) | |
62 | { | |
63 | (*r)->vtbl->teardown(r); | |
64 | } | |
65 | ||
66 | static inline | |
67 | uint32_t bitcount(uint32_t bits) | |
68 | { | |
69 | bits = (bits & 0x55555555) + (bits >> 1 & 0x55555555); | |
70 | bits = (bits & 0x33333333) + (bits >> 2 & 0x33333333); | |
71 | bits = (bits & 0x0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f); | |
72 | bits = (bits & 0x00ff00ff) + (bits >> 8 & 0x00ff00ff); | |
73 | return (bits & 0x0000ffff) + (bits >>16 & 0x0000ffff); | |
74 | } | |
75 | ||
76 | #define TRY_IO(expr) \ | |
77 | do { \ | |
78 | if ((expr)) goto FAIL; \ | |
79 | } while (0) | |
80 | ||
81 | #define ENSURE(expr) \ | |
82 | do { \ | |
83 | if (!(expr)) goto FAIL;\ | |
84 | } while (0) | |
85 | ||
86 | int pcm_read(pcm_io_context_t *io, void *buffer, uint32_t size); | |
87 | int pcm_skip(pcm_io_context_t *io, int64_t count); | |
88 | ||
89 | static inline int pcm_seek(pcm_io_context_t *io, int64_t off, int whence) | |
90 | { | |
91 | return io->vtbl->seek ? io->vtbl->seek(io->cookie, off, whence) : -1; | |
92 | } | |
93 | ||
94 | static inline int64_t pcm_tell(pcm_io_context_t *io) | |
95 | { | |
96 | return io->vtbl->tell ? io->vtbl->tell(io->cookie) : -1; | |
97 | } | |
98 | ||
99 | int pcm_read16le(pcm_io_context_t *io, uint16_t *value); | |
100 | int pcm_read16be(pcm_io_context_t *io, uint16_t *value); | |
101 | int pcm_read32le(pcm_io_context_t *io, uint32_t *value); | |
102 | int pcm_read32be(pcm_io_context_t *io, uint32_t *value); | |
103 | int pcm_read64le(pcm_io_context_t *io, uint64_t *value); | |
104 | int pcm_read64be(pcm_io_context_t *io, uint64_t *value); | |
105 | int pcm_scanl(pcm_io_context_t *io, const char *fmt, ...); | |
106 | int pcm_scanb(pcm_io_context_t *io, const char *fmt, ...); | |
107 | ||
108 | int apple_chan_chunk(pcm_io_context_t *io, uint32_t chunk_size, | |
109 | pcm_sample_description_t *fmt, uint8_t *mapping); | |
110 | ||
111 | pcm_reader_t *wav_open(pcm_io_context_t *io, int ignore_length); | |
112 | pcm_reader_t *raw_open(pcm_io_context_t *io, | |
113 | const pcm_sample_description_t *desc); | |
114 | pcm_reader_t *caf_open(pcm_io_context_t *io, | |
115 | aacenc_tag_callback_t tag_callback, void *tag_ctx); | |
116 | ||
117 | pcm_reader_t *pcm_open_native_converter(pcm_reader_t *reader); | |
118 | pcm_reader_t *pcm_open_float_converter(pcm_reader_t *reader); | |
119 | pcm_reader_t *pcm_open_sint16_converter(pcm_reader_t *reader); | |
120 | ||
121 | pcm_reader_t *extrapolater_open(pcm_reader_t *reader); | |
122 | pcm_reader_t *limiter_open(pcm_reader_t *reader); | |
123 | ||
124 | #endif |