summaryrefslogtreecommitdiffstats
path: root/src/pacat.c
blob: 5f5a373bb845a9761c2d4c48d9825054149d183f (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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>

#include "polyp.h"
#include "mainloop.h"

static struct pa_context *context = NULL;
static struct pa_stream *stream = NULL;
static struct pa_mainloop_api *mainloop_api = NULL;

static void *buffer = NULL;
static size_t buffer_length = 0, buffer_index = 0;

static void* stdin_source = NULL;

static void context_die_callback(struct pa_context *c, void *userdata) {
    assert(c);
    fprintf(stderr, "Connection to server shut down, exiting.\n");
    mainloop_api->quit(mainloop_api, 1);
}

static void stream_die_callback(struct pa_stream *s, void *userdata) {
    assert(s);
    fprintf(stderr, "Stream deleted, exiting.\n");
    mainloop_api->quit(mainloop_api, 1);
}

static void stream_write_callback(struct pa_stream *s, size_t length, void *userdata) {
    size_t l;
    assert(s && length);
    
    mainloop_api->enable_io(mainloop_api, stdin_source, PA_STREAM_PLAYBACK);

    if (!buffer)
        return;
    
    assert(buffer_length);
    
    l = length;
    if (l > buffer_length)
        l = buffer_length;
    
    pa_stream_write(s, buffer+buffer_index, l);
    buffer_length -= l;
    buffer_index += l;
    
    if (!buffer_length) {
        free(buffer);
        buffer = NULL;
        buffer_index = buffer_length = 0;
    }
}

static void stream_complete_callback(struct pa_context*c, struct pa_stream *s, void *userdata) {
    assert(c);

    if (!s) {
        fprintf(stderr, "Stream creation failed.\n");
        mainloop_api->quit(mainloop_api, 1);
    }

    stream = s;
    pa_stream_set_die_callback(stream, stream_die_callback, NULL);
    pa_stream_set_write_callback(stream, stream_write_callback, NULL);
}

static void context_complete_callback(struct pa_context *c, int success, void *userdata) {
    static const struct pa_sample_spec ss = {
        .format = SAMPLE_S16NE,
        .rate = 44100,
        .channels = 2
    };
        
    assert(c && !stream);

    if (!success) {
        fprintf(stderr, "Connection failed\n");
        goto fail;
    }
    
    if (pa_stream_new(c, PA_STREAM_PLAYBACK, NULL, "pacat", &ss, NULL, stream_complete_callback, NULL) < 0) {
        fprintf(stderr, "pa_stream_new() failed.\n");
        goto fail;
    }

    return;
    
fail:
    mainloop_api->quit(mainloop_api, 1);
}

static void stdin_callback(struct pa_mainloop_api*a, void *id, int fd, enum pa_mainloop_api_io_events events, void *userdata) {
    size_t l;
    ssize_t r;
    assert(a == mainloop_api && id && fd == STDIN_FILENO && events == PA_MAINLOOP_API_IO_EVENT_INPUT);

    if (buffer) {
        mainloop_api->enable_io(mainloop_api, stdin_source, PA_MAINLOOP_API_IO_EVENT_NULL);
        return;
    }

    if (!(l = pa_stream_writable_size(stream)))
        l = 4096;
    buffer = malloc(l);
    assert(buffer);
    if ((r = read(fd, buffer, l)) <= 0) {
        if (r == 0)
            mainloop_api->quit(mainloop_api, 0);
        else {
            fprintf(stderr, "read() failed: %s\n", strerror(errno));
            mainloop_api->quit(mainloop_api, 1);
        }

        return;
    }

    buffer_length = r;
    buffer_index = 0;
}

int main(int argc, char *argv[]) {
    struct pa_mainloop* m;
    int ret = 1;

    if (!(m = pa_mainloop_new())) {
        fprintf(stderr, "pa_mainloop_new() failed.\n");
        goto quit;
    }

    mainloop_api = pa_mainloop_get_api(m);

    if (!(stdin_source = mainloop_api->source_io(mainloop_api, STDIN_FILENO, PA_MAINLOOP_API_IO_EVENT_INPUT, stdin_callback, NULL))) {
        fprintf(stderr, "source_io() failed.\n");
        goto quit;
    }
    
    if (!(context = pa_context_new(mainloop_api, argv[0]))) {
        fprintf(stderr, "pa_context_new() failed.\n");
        goto quit;
    }

    if (pa_context_connect(context, NULL, context_complete_callback, NULL) < 0) {
        fprintf(stderr, "pa_context_connext() failed.\n");
        goto quit;
    }
        
    pa_context_set_die_callback(context, context_die_callback, NULL);

    if (pa_mainloop_run(m, &ret) < 0) {
        fprintf(stderr, "pa_mainloop_run() failed.\n");
        goto quit;
    }
    
quit:
    if (stream)
        pa_stream_free(stream);
    if (context)
        pa_context_free(context);
    if (m)
        pa_mainloop_free(m);
    if (buffer)
        free(buffer);
    
    return ret;
}