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2d744bd5 | 1 | #ifndef PCM_READER_H |
2 | #define PCM_READER_H | |
3 | ||
e8e9f79e | 4 | #include "lpcm.h" |
5 | ||
2d744bd5 | 6 | typedef struct pcm_reader_t pcm_reader_t; |
7 | ||
8 | typedef struct pcm_reader_vtbl_t { | |
9 | const pcm_sample_description_t *(*get_format)(pcm_reader_t *); | |
10 | int64_t (*get_length)(pcm_reader_t *); | |
11 | int64_t (*get_position)(pcm_reader_t *); | |
12 | int (*read_frames)(pcm_reader_t *, void *, unsigned); | |
13 | void (*teardown)(pcm_reader_t **); | |
14 | } pcm_reader_vtbl_t; | |
15 | ||
16 | struct pcm_reader_t { | |
17 | pcm_reader_vtbl_t *vtbl; | |
18 | }; | |
19 | ||
29a8f73f | 20 | typedef int (*pcm_read_callback)(void *cookie, void *data, uint32_t count); |
21 | typedef int (*pcm_seek_callback)(void *cookie, int64_t off, int whence); | |
22 | typedef int64_t (*pcm_tell_callback)(void *cookie); | |
23 | ||
24 | typedef struct pcm_io_vtbl_t { | |
25 | pcm_read_callback read; | |
26 | pcm_seek_callback seek; | |
27 | pcm_tell_callback tell; | |
28 | } pcm_io_vtbl_t; | |
29 | ||
30 | typedef struct pcm_io_context_t { | |
31 | pcm_io_vtbl_t *vtbl; | |
32 | void *cookie; | |
33 | } pcm_io_context_t; | |
34 | ||
2d744bd5 | 35 | static inline |
36 | const pcm_sample_description_t *pcm_get_format(pcm_reader_t *r) | |
37 | { | |
38 | return r->vtbl->get_format(r); | |
39 | } | |
40 | ||
41 | static inline | |
42 | int64_t pcm_get_length(pcm_reader_t *r) | |
43 | { | |
44 | return r->vtbl->get_length(r); | |
45 | } | |
46 | ||
47 | static inline | |
48 | int64_t pcm_get_position(pcm_reader_t *r) | |
49 | { | |
50 | return r->vtbl->get_position(r); | |
51 | } | |
52 | ||
53 | static inline | |
54 | int64_t pcm_read_frames(pcm_reader_t *r, void *data, unsigned nframes) | |
55 | { | |
56 | return r->vtbl->read_frames(r, data, nframes); | |
57 | } | |
58 | ||
59 | static inline | |
60 | void pcm_teardown(pcm_reader_t **r) | |
61 | { | |
62 | (*r)->vtbl->teardown(r); | |
63 | } | |
64 | ||
e8e9f79e | 65 | pcm_reader_t *pcm_open_sint16_converter(pcm_reader_t *reader); |
66 | ||
29a8f73f | 67 | #define TRY_IO(expr) \ |
68 | do { \ | |
69 | if ((expr)) goto FAIL; \ | |
70 | } while (0) | |
71 | ||
72 | int pcm_read(pcm_io_context_t *io, void *buffer, uint32_t size); | |
73 | int pcm_skip(pcm_io_context_t *io, int64_t count); | |
74 | ||
75 | static int pcm_seek(pcm_io_context_t *io, int64_t off, int whence) | |
76 | { | |
77 | return io->vtbl->seek ? io->vtbl->seek(io->cookie, off, whence) : -1; | |
78 | } | |
79 | ||
80 | static inline int64_t pcm_tell(pcm_io_context_t *io) | |
81 | { | |
82 | return io->vtbl->tell ? io->vtbl->tell(io->cookie) : -1; | |
83 | } | |
84 | ||
85 | int pcm_read16le(pcm_io_context_t *io, uint16_t *value); | |
86 | int pcm_read16be(pcm_io_context_t *io, uint16_t *value); | |
87 | int pcm_read32le(pcm_io_context_t *io, uint32_t *value); | |
88 | int pcm_read32be(pcm_io_context_t *io, uint32_t *value); | |
89 | int pcm_read64le(pcm_io_context_t *io, uint64_t *value); | |
90 | int pcm_read64be(pcm_io_context_t *io, uint64_t *value); | |
91 | int pcm_scanl(pcm_io_context_t *io, const char *fmt, ...); | |
92 | int pcm_scanb(pcm_io_context_t *io, const char *fmt, ...); | |
93 | ||
2d744bd5 | 94 | #endif |