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" |
a7e00a42 |
9 | #include "metadata.h" |
e8e9f79e |
10 | |
2d744bd5 |
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 | |
29a8f73f |
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 | |
2d744bd5 |
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 | |
a7e00a42 |
58 | int pcm_read_frames(pcm_reader_t *r, void *data, unsigned nframes); |
2d744bd5 |
59 | |
60 | static inline |
61 | void pcm_teardown(pcm_reader_t **r) |
62 | { |
63 | (*r)->vtbl->teardown(r); |
64 | } |
65 | |
1af8624b |
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 | } |
e8e9f79e |
75 | |
29a8f73f |
76 | #define TRY_IO(expr) \ |
77 | do { \ |
78 | if ((expr)) goto FAIL; \ |
79 | } while (0) |
80 | |
1af8624b |
81 | #define ENSURE(expr) \ |
82 | do { \ |
83 | if (!(expr)) goto FAIL;\ |
84 | } while (0) |
85 | |
29a8f73f |
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 | |
3aa2787e |
89 | static inline int pcm_seek(pcm_io_context_t *io, int64_t off, int whence) |
29a8f73f |
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 | |
1af8624b |
108 | int apple_chan_chunk(pcm_io_context_t *io, uint32_t chunk_size, |
109 | pcm_sample_description_t *fmt, uint8_t *mapping); |
110 | |
a7e00a42 |
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); |
1af8624b |
119 | pcm_reader_t *pcm_open_sint16_converter(pcm_reader_t *reader); |
120 | |
4d48b091 |
121 | pcm_reader_t *extrapolater_open(pcm_reader_t *reader); |
b54538f7 |
122 | pcm_reader_t *limiter_open(pcm_reader_t *reader); |
4d48b091 |
123 | |
2d744bd5 |
124 | #endif |