summaryrefslogtreecommitdiffstats
path: root/src/sinkinput.c
blob: 54778a81e1be27d1eab8a6ca976d1bbbc3991a14 (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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>

#include "sinkinput.h"
#include "sample-util.h"

#define CONVERT_BUFFER_LENGTH 4096

struct pa_sink_input* pa_sink_input_new(struct pa_sink *s, const char *name, const struct pa_sample_spec *spec) {
    struct pa_sink_input *i;
    struct pa_resampler *resampler = NULL;
    int r;
    char st[256];
    assert(s && spec);

    if (!pa_sample_spec_equal(spec, &s->sample_spec))
        if (!(resampler = pa_resampler_new(spec, &s->sample_spec)))
            return NULL;
    
    i = malloc(sizeof(struct pa_sink_input));
    assert(i);
    i->name = name ? strdup(name) : NULL;
    i->client = NULL;
    i->owner = NULL;
    i->sink = s;
    i->sample_spec = *spec;

    i->peek = NULL;
    i->drop = NULL;
    i->kill = NULL;
    i->get_latency = NULL;
    i->userdata = NULL;

    i->volume = PA_VOLUME_NORM;

    i->resampled_chunk.memblock = NULL;
    i->resampled_chunk.index = i->resampled_chunk.length = 0;
    i->resampler = resampler;
    
    assert(s->core);
    r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
    assert(r == 0 && i->index != PA_IDXSET_INVALID);
    r = pa_idxset_put(s->inputs, i, NULL);
    assert(r == 0);

    pa_sample_snprint(st, sizeof(st), spec);
    fprintf(stderr, "sink-input: created %u \"%s\" on %u with sample spec \"%s\"\n", i->index, i->name, s->index, st);
    
    return i;    
}

void pa_sink_input_free(struct pa_sink_input* i) {
    assert(i);

    assert(i->sink && i->sink->core);
    pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
    pa_idxset_remove_by_data(i->sink->inputs, i, NULL);

    if (i->resampled_chunk.memblock)
        pa_memblock_unref(i->resampled_chunk.memblock);
    if (i->resampler)
        pa_resampler_free(i->resampler);
    
    free(i->name);
    free(i);
}

void pa_sink_input_kill(struct pa_sink_input*i) {
    assert(i);

    if (i->kill)
        i->kill(i);
}

uint32_t pa_sink_input_get_latency(struct pa_sink_input *i) {
    uint32_t l = 0;
    
    assert(i);
    if (i->get_latency)
        l += i->get_latency(i);

    assert(i->sink);
    l += pa_sink_get_latency(i->sink);

    return l;
}

int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
    assert(i && chunk && i->peek && i->drop);

    if (!i->resampler)
        return i->peek(i, chunk);

    if (!i->resampled_chunk.memblock) {
        struct pa_memchunk tchunk;
        size_t l;
        int ret;
        
        if ((ret = i->peek(i, &tchunk)) < 0)
            return ret;

        l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
        if (tchunk.length > l)
            tchunk.length = l;

        i->drop(i, tchunk.length);
        
        pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
        pa_memblock_unref(tchunk.memblock);
    }

    assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
    *chunk = i->resampled_chunk;
    pa_memblock_ref(i->resampled_chunk.memblock);
    return 0;
}

void pa_sink_input_drop(struct pa_sink_input *i, size_t length) {
    assert(i && length);

    if (!i->resampler) {
        i->drop(i, length);
        return;
    }
    
    assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);

    i->resampled_chunk.index += length;
    i->resampled_chunk.length -= length;

    if (!i->resampled_chunk.length) {
        pa_memblock_unref(i->resampled_chunk.memblock);
        i->resampled_chunk.memblock = NULL;
        i->resampled_chunk.index = i->resampled_chunk.length = 0;
    }
}