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
|
/*
* Milan Mimica
* Audio example that plays multiple files at the same time
* Originlly derived from the ex_acodec example.
*/
#include <stdio.h>
#include "allegro5/allegro.h"
#include "allegro5/allegro_audio.h"
#include "allegro5/allegro_acodec.h"
#include "common.c"
char *default_files[] = {NULL, "data/welcome.voc",
"data/haiku/earth_0.ogg", "data/haiku/water_0.ogg",
"data/haiku/fire_0.ogg", "data/haiku/air_0.ogg"};
int main(int argc, char **argv)
{
int i;
ALLEGRO_SAMPLE **sample_data;
ALLEGRO_SAMPLE_INSTANCE **sample;
ALLEGRO_MIXER *mixer;
ALLEGRO_VOICE *voice;
float longest_sample;
if (!al_init()) {
abort_example("Could not init Allegro.\n");
}
open_log();
if (argc < 2) {
log_printf("This example can be run from the command line.\nUsage: %s {audio_files}\n", argv[0]);
argv = default_files;
argc = 6;
}
al_init_acodec_addon();
if (!al_install_audio()) {
abort_example("Could not init sound!\n");
}
sample = malloc(argc * sizeof(*sample));
if (!sample) {
abort_example("Out of memory!\n");
}
sample_data = malloc(argc * sizeof(*sample_data));
if (!sample_data) {
abort_example("Out of memory!\n");
}
/* a voice is used for playback */
voice = al_create_voice(44100, ALLEGRO_AUDIO_DEPTH_INT16,
ALLEGRO_CHANNEL_CONF_2);
if (!voice) {
abort_example("Could not create ALLEGRO_VOICE from sample\n");
}
mixer = al_create_mixer(44100, ALLEGRO_AUDIO_DEPTH_FLOAT32,
ALLEGRO_CHANNEL_CONF_2);
if (!mixer) {
abort_example("al_create_mixer failed.\n");
}
if (!al_attach_mixer_to_voice(mixer, voice)) {
abort_example("al_attach_mixer_to_voice failed.\n");
}
for (i = 1; i < argc; ++i) {
const char *filename = argv[i];
sample[i] = NULL;
/* loads the entire sound file from disk into sample data */
sample_data[i] = al_load_sample(filename);
if (!sample_data[i]) {
abort_example("Could not load sample from '%s'!\n", filename);
}
sample[i] = al_create_sample_instance(sample_data[i]);
if (!sample[i]) {
log_printf("Could not create sample!\n");
al_destroy_sample(sample_data[i]);
sample_data[i] = NULL;
continue;
}
if (!al_attach_sample_instance_to_mixer(sample[i], mixer)) {
log_printf("al_attach_sample_instance_to_mixer failed.\n");
continue;
}
}
longest_sample = 0;
for (i = 1; i < argc; ++i) {
const char *filename = argv[i];
float sample_time;
if (!sample[i])
continue;
/* play each sample once */
al_play_sample_instance(sample[i]);
sample_time = al_get_sample_instance_time(sample[i]);
log_printf("Playing '%s' (%.3f seconds)\n", filename, sample_time);
if (sample_time > longest_sample)
longest_sample = sample_time;
}
al_rest(longest_sample);
log_printf("Done\n");
for (i = 1; i < argc; ++i) {
/* free the memory allocated when creating the sample + voice */
if (sample[i]) {
al_stop_sample_instance(sample[i]);
al_destroy_sample_instance(sample[i]);
al_destroy_sample(sample_data[i]);
}
}
al_destroy_mixer(mixer);
al_destroy_voice(voice);
free(sample);
free(sample_data);
al_uninstall_audio();
close_log(true);
return 0;
}
|
