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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#include <stdio.h>
#include <stdlib.h>
#include "../config.h"
#include "afmt.h"
#include "audio_out.h"
#include "audio_out_internal.h"
#include "audio_plugin.h"
static ao_info_t info =
{
"Plugin audio output",
"plugin",
"Anders",
""
};
LIBAO_EXTERN(plugin)
#define plugin(i) (ao_plugin_local_data.plugins[i])
#define driver() (ao_plugin_local_data.driver)
// local data
typedef struct ao_plugin_local_data_s
{
ao_functions_t* driver; // Output driver set in mplayer.c
ao_plugin_functions_t** plugins; // List of used plugins
ao_plugin_functions_t* available_plugins[NPL]; // List of available plugins
} ao_plugin_local_data_t;
static ao_plugin_local_data_t ao_plugin_local_data={NULL,NULL,AO_PLUGINS};
// gloabal data
volatile ao_plugin_data_t ao_plugin_data; // data used by the plugins
volatile ao_plugin_cfg_t ao_plugin_cfg=CFG_DEFAULTS; // cfg data set in cfg-mplayer.h
// to set/get/query special features/parameters
static int control(int cmd,int arg){
switch(cmd){
case AOCONTROL_SET_PLUGIN_DRIVER:
ao_plugin_local_data.driver=(ao_functions_t*)arg;
return CONTROL_OK;
default:
return driver()->control(cmd,arg);
}
return CONTROL_UNKNOWN;
}
// Recursive function for adding plugins
// return 1 for success and 0 for error
int add_plugin(int i,char* cfg){
int cnt=0;
// Find end of plugin name
while((cfg[cnt]!=',')&&(cfg[cnt]!='\0')&&(cnt<100)) cnt++;
if(cnt >= 100)
return 0;
// Is this the last iteration or just another plugin
if(cfg[cnt]=='\0'){
ao_plugin_local_data.plugins=malloc((i+1)*sizeof(ao_plugin_functions_t*));
if(ao_plugin_local_data.plugins){
ao_plugin_local_data.plugins[i+1]=NULL;
// Find the plugin matching the cfg string name
cnt=0;
while(ao_plugin_local_data.available_plugins[cnt] && cnt<20){
if(0==strcmp(ao_plugin_local_data.available_plugins[cnt]->info->short_name,cfg)){
ao_plugin_local_data.plugins[i]=ao_plugin_local_data.available_plugins[cnt];
return 1;
}
cnt++;
}
printf("[plugin]: Invalid plugin: %s \n",cfg);
return 0;
}
else
return 0;
} else {
cfg[cnt]='\0';
if(add_plugin(i+1,&cfg[cnt+1])){
cnt=0;
// Find the plugin matching the cfg string name
while(ao_plugin_local_data.available_plugins[cnt] && cnt < 20){
if(0==strcmp(ao_plugin_local_data.available_plugins[cnt]->info->short_name,cfg)){
ao_plugin_local_data.plugins[i]=ao_plugin_local_data.available_plugins[cnt];
return 1;
}
cnt++;
}
printf("[plugin]: Invalid plugin: %s \n",cfg);
return 0;
}
else
return 0;
}
return 0; // Will never happen...
}
// open & setup audio device and plugins
// return: 1=success 0=fail
static int init(int rate,int channels,int format,int flags){
int ok=1;
/* Create list of plugins from cfg option */
int i=0;
if(ao_plugin_cfg.plugin_list){
if(!add_plugin(i,ao_plugin_cfg.plugin_list))
return 0;
}
/* Set input parameters and itterate through plugins each plugin
changes the parameters according to its output */
ao_plugin_data.rate=rate;
ao_plugin_data.channels=channels;
ao_plugin_data.format=format;
ao_plugin_data.sz_mult=1;
ao_plugin_data.sz_fix=0;
ao_plugin_data.delay_mult=1;
ao_plugin_data.delay_fix=0;
i=0;
while(plugin(i)&&ok)
ok=plugin(i++)->init();
if(!ok) return 0;
// This should never happen but check anyway
if(NULL==ao_plugin_local_data.driver)
return 0;
ok = driver()->init(ao_plugin_data.rate,
ao_plugin_data.channels,
ao_plugin_data.format,
flags);
if(!ok) return 0;
/* Now that the driver is initialized we can calculate and set the
input and output buffers for each plugin */
ao_plugin_data.len=driver()->get_space();
while((i>0) && ok)
ok=plugin(--i)->control(AOCONTROL_PLUGIN_SET_LEN,0);
if(!ok) return 0;
return 1;
}
// close audio device
static void uninit(){
int i=0;
driver()->uninit();
while(plugin(i))
plugin(i++)->uninit();
if(ao_plugin_local_data.plugins)
free(ao_plugin_local_data.plugins);
}
// stop playing and empty buffers (for seeking/pause)
static void reset(){
int i=0;
driver()->reset();
while(plugin(i))
plugin(i++)->reset();
}
// stop playing, keep buffers (for pause)
static void audio_pause(){
driver()->pause();
}
// resume playing, after audio_pause()
static void audio_resume(){
driver()->resume();
}
// return: how many bytes can be played without blocking
static int get_space(){
double sz=(double)(driver()->get_space());
sz*=ao_plugin_data.sz_mult;
sz+=ao_plugin_data.sz_fix;
return (int)(sz);
}
// plays 'len' bytes of 'data'
// return: number of bytes played
static int play(void* data,int len,int flags){
int i=0;
/* Due to constant buffer sizes in plugins limit length */
int tmp = get_space();
int ret_len =(tmp<len)?tmp:len;
/* Filter data */
ao_plugin_data.len=ret_len;
ao_plugin_data.data=data;
while(plugin(i))
plugin(i++)->play();
/* Send data to output */
//fprintf(stderr, "ao_plugin: ret_len=%d, len=%d\n", ret_len, len);
len=driver()->play(ao_plugin_data.data,ao_plugin_data.len,flags);
//fprintf(stderr, "ao_plugin: returned len=%d\n", len);
if(len!=ao_plugin_data.len)
fprintf(stderr,"[ao_plugin] Warning under or over flow in sound plugin\n");
return ret_len;
}
// return: delay in seconds between first and last sample in buffer
static float get_delay(){
float delay=driver()->get_delay();
delay*=ao_plugin_data.delay_mult;
delay+=ao_plugin_data.delay_fix;
return delay;
}
|
