Update of /cvsroot/mplayer/main/libao2 In directory mplayer:/var/tmp.root/cvs-serv32034/libao2 Added Files: ao_plugin.c audio_plugin.h audio_plugin_internal.h Log Message: ao_plugin.c and plugin headers added --- NEW FILE --- #include <stdio.h> #include <stdlib.h> #include "../config.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.ao_plugins[i]) #define driver() (ao_plugin_local_data.ao_driver) /* local data */ typedef struct ao_plugin_local_data_s { ao_plugin_functions_t** ao_plugins; /* List of all plugins */ ao_functions_t* ao_driver; /* ao driver used by ao_plugin */ } ao_plugin_local_data_t; ao_plugin_local_data_t ao_plugin_local_data; /* gloabal data */ ao_plugin_data_t ao_plugin_data; // to set/get/query special features/parameters static int control(int cmd,int arg){ return driver()->control(cmd,arg); } // 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; /* FIXME these are cfg file parameters */ int i=0; ao_plugin_local_data.ao_plugins=malloc((i+1)*sizeof(ao_plugin_functions_t*)); plugin(i)=NULL; ao_plugin_local_data.ao_driver=audio_out_drivers[1]; /* 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; 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(); return 1; } // close audio device static void uninit(){ int i=0; driver()->uninit(); while(plugin(i)) plugin(i++)->uninit(); if(ao_plugin_local_data.ao_plugins) free(ao_plugin_local_data.ao_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 */ len=driver()->play(ao_plugin_data.data,ao_plugin_data.len,flags); if(len!=ao_plugin_data.len) printf("Buffer over flow in sound plugin "); 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; } --- NEW FILE --- /* functions supplied by plugins */ typedef struct ao_plugin_functions_s { ao_info_t *info; int (*control)(int cmd,int arg); int (*init)(); void (*uninit)(); void (*reset)(); int (*play)(); } ao_plugin_functions_t; /* Global data for all audio plugins */ typedef struct ao_plugin_data_s { void* data; /* current data block read only ok to change */ int len; /* setup and current buffer length */ int rate; /* setup data rate */ int channels; /* setup number of channels */ int format; /* setup format */ double sz_mult; /* Buffer size multiplier */ double sz_fix; /* Fix extra buffer size */ float delay_mult; /* Delay multiplier */ float delay_fix; /* Fix delay */ }ao_plugin_data_t; extern ao_plugin_data_t ao_plugin_data; --- NEW FILE --- // prototypes: static int control(int cmd,int arg); static int init(float*); static void uninit(); static void reset(); static int play(void* data,int len,int flags); #define LIBAO_PLUGIN_EXTERN(x) ao_functions_t audio_out_##x =\ {\ &info,\ control,\ init,\ uninit,\ reset,\ play,\ };