summaryrefslogtreecommitdiffstats
path: root/src/sample.h
blob: 5ed740e48338d4e9cc2eaf880cf4657305e64df8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
#ifndef foosamplehfoo
#define foosamplehfoo

#include <inttypes.h>

#include "memblock.h"

enum sample_format {
    SAMPLE_U8,
    SAMPLE_ALAW,
    SAMPLE_ULAW,
    SAMPLE_S16LE,
    SAMPLE_S16BE,
    SAMPLE_FLOAT32
};

#define SAMPLE_S16NE SAMPLE_S16LE

struct sample_spec {
    enum sample_format format;
    uint32_t rate;
    uint32_t channels;
};

#define DEFAULT_SAMPLE_SPEC default_sample_spec

extern struct sample_spec default_sample_spec;

struct memblock *silence_memblock(struct memblock* b, struct sample_spec *spec);
void silence_memchunk(struct memchunk *c, struct sample_spec *spec);
void silence_memory(void *p, size_t length, struct sample_spec *spec);

struct mix_info {
    struct memchunk chunk;
    uint8_t volume;
    void *userdata;
};

size_t mix_chunks(struct mix_info channels[], unsigned nchannels, void *data, size_t length, struct sample_spec *spec, uint8_t volume);

size_t bytes_per_second(struct sample_spec *spec);
size_t sample_size(struct sample_spec *spec);
uint32_t samples_usec(size_t length, struct sample_spec *spec);

#endif