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#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 itteration 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;
}
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