556a3db1 |
1 | /* |
2 | * Copyright (C) 2013 nu774 |
3 | * For conditions of distribution and use, see copyright notice in COPYING |
4 | */ |
2d744bd5 |
5 | #ifndef PCM_READER_H |
6 | #define PCM_READER_H |
7 | |
e8e9f79e |
8 | #include "lpcm.h" |
9 | |
2d744bd5 |
10 | typedef struct pcm_reader_t pcm_reader_t; |
11 | |
12 | typedef struct pcm_reader_vtbl_t { |
13 | const pcm_sample_description_t *(*get_format)(pcm_reader_t *); |
14 | int64_t (*get_length)(pcm_reader_t *); |
15 | int64_t (*get_position)(pcm_reader_t *); |
16 | int (*read_frames)(pcm_reader_t *, void *, unsigned); |
17 | void (*teardown)(pcm_reader_t **); |
18 | } pcm_reader_vtbl_t; |
19 | |
20 | struct pcm_reader_t { |
21 | pcm_reader_vtbl_t *vtbl; |
22 | }; |
23 | |
29a8f73f |
24 | typedef int (*pcm_read_callback)(void *cookie, void *data, uint32_t count); |
25 | typedef int (*pcm_seek_callback)(void *cookie, int64_t off, int whence); |
26 | typedef int64_t (*pcm_tell_callback)(void *cookie); |
27 | |
28 | typedef struct pcm_io_vtbl_t { |
29 | pcm_read_callback read; |
30 | pcm_seek_callback seek; |
31 | pcm_tell_callback tell; |
32 | } pcm_io_vtbl_t; |
33 | |
34 | typedef struct pcm_io_context_t { |
35 | pcm_io_vtbl_t *vtbl; |
36 | void *cookie; |
37 | } pcm_io_context_t; |
38 | |
2d744bd5 |
39 | static inline |
40 | const pcm_sample_description_t *pcm_get_format(pcm_reader_t *r) |
41 | { |
42 | return r->vtbl->get_format(r); |
43 | } |
44 | |
45 | static inline |
46 | int64_t pcm_get_length(pcm_reader_t *r) |
47 | { |
48 | return r->vtbl->get_length(r); |
49 | } |
50 | |
51 | static inline |
52 | int64_t pcm_get_position(pcm_reader_t *r) |
53 | { |
54 | return r->vtbl->get_position(r); |
55 | } |
56 | |
57 | static inline |
58 | int64_t pcm_read_frames(pcm_reader_t *r, void *data, unsigned nframes) |
59 | { |
60 | return r->vtbl->read_frames(r, data, nframes); |
61 | } |
62 | |
63 | static inline |
64 | void pcm_teardown(pcm_reader_t **r) |
65 | { |
66 | (*r)->vtbl->teardown(r); |
67 | } |
68 | |
1af8624b |
69 | static inline |
70 | uint32_t bitcount(uint32_t bits) |
71 | { |
72 | bits = (bits & 0x55555555) + (bits >> 1 & 0x55555555); |
73 | bits = (bits & 0x33333333) + (bits >> 2 & 0x33333333); |
74 | bits = (bits & 0x0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f); |
75 | bits = (bits & 0x00ff00ff) + (bits >> 8 & 0x00ff00ff); |
76 | return (bits & 0x0000ffff) + (bits >>16 & 0x0000ffff); |
77 | } |
e8e9f79e |
78 | |
29a8f73f |
79 | #define TRY_IO(expr) \ |
80 | do { \ |
81 | if ((expr)) goto FAIL; \ |
82 | } while (0) |
83 | |
1af8624b |
84 | #define ENSURE(expr) \ |
85 | do { \ |
86 | if (!(expr)) goto FAIL;\ |
87 | } while (0) |
88 | |
29a8f73f |
89 | int pcm_read(pcm_io_context_t *io, void *buffer, uint32_t size); |
90 | int pcm_skip(pcm_io_context_t *io, int64_t count); |
91 | |
3aa2787e |
92 | static inline int pcm_seek(pcm_io_context_t *io, int64_t off, int whence) |
29a8f73f |
93 | { |
94 | return io->vtbl->seek ? io->vtbl->seek(io->cookie, off, whence) : -1; |
95 | } |
96 | |
97 | static inline int64_t pcm_tell(pcm_io_context_t *io) |
98 | { |
99 | return io->vtbl->tell ? io->vtbl->tell(io->cookie) : -1; |
100 | } |
101 | |
102 | int pcm_read16le(pcm_io_context_t *io, uint16_t *value); |
103 | int pcm_read16be(pcm_io_context_t *io, uint16_t *value); |
104 | int pcm_read32le(pcm_io_context_t *io, uint32_t *value); |
105 | int pcm_read32be(pcm_io_context_t *io, uint32_t *value); |
106 | int pcm_read64le(pcm_io_context_t *io, uint64_t *value); |
107 | int pcm_read64be(pcm_io_context_t *io, uint64_t *value); |
108 | int pcm_scanl(pcm_io_context_t *io, const char *fmt, ...); |
109 | int pcm_scanb(pcm_io_context_t *io, const char *fmt, ...); |
110 | |
1af8624b |
111 | int apple_chan_chunk(pcm_io_context_t *io, uint32_t chunk_size, |
112 | pcm_sample_description_t *fmt, uint8_t *mapping); |
113 | |
114 | pcm_reader_t *pcm_open_sint16_converter(pcm_reader_t *reader); |
115 | |
4d48b091 |
116 | pcm_reader_t *extrapolater_open(pcm_reader_t *reader); |
117 | |
2d744bd5 |
118 | #endif |