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 |