mirror of
https://github.com/mpv-player/mpv
synced 2024-12-14 02:45:43 +00:00
44399cfe59
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3097 b3059339-0415-0410-9bf9-f77b7e298cf2
146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "../config.h"
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#include "audio_out.h"
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#include "audio_out_internal.h"
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#include "audio_plugin.h"
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static ao_info_t info =
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{
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"Plugin audio output",
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"plugin",
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"Anders",
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""
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};
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LIBAO_EXTERN(plugin)
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#define plugin(i) (ao_plugin_local_data.ao_plugins[i])
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#define driver() (ao_plugin_local_data.ao_driver)
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/* local data */
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typedef struct ao_plugin_local_data_s
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{
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ao_plugin_functions_t** ao_plugins; /* List of all plugins */
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ao_functions_t* ao_driver; /* ao driver used by ao_plugin */
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} ao_plugin_local_data_t;
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ao_plugin_local_data_t ao_plugin_local_data;
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/* gloabal data */
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ao_plugin_data_t ao_plugin_data;
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// to set/get/query special features/parameters
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static int control(int cmd,int arg){
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return driver()->control(cmd,arg);
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}
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// open & setup audio device and plugins
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// return: 1=success 0=fail
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static int init(int rate,int channels,int format,int flags){
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int ok=1;
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/* FIXME these are cfg file parameters */
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int i=0;
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ao_plugin_local_data.ao_plugins=malloc((i+1)*sizeof(ao_plugin_functions_t*));
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plugin(i)=NULL;
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ao_plugin_local_data.ao_driver=audio_out_drivers[1];
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/* Set input parameters and itterate through plugins each plugin
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changes the parameters according to its output */
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ao_plugin_data.rate=rate;
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ao_plugin_data.channels=channels;
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ao_plugin_data.format=format;
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ao_plugin_data.sz_mult=1;
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ao_plugin_data.sz_fix=0;
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ao_plugin_data.delay_mult=1;
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ao_plugin_data.delay_fix=0;
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i=0;
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while(plugin(i)&&ok)
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ok=plugin(i++)->init();
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if(!ok) return 0;
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ok = driver()->init(ao_plugin_data.rate,
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ao_plugin_data.channels,
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ao_plugin_data.format,
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flags);
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if(!ok) return 0;
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/* Now that the driver is initialized we can calculate and set the
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input and output buffers for each plugin */
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ao_plugin_data.len=driver()->get_space();
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return 1;
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}
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// close audio device
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static void uninit(){
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int i=0;
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driver()->uninit();
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while(plugin(i))
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plugin(i++)->uninit();
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if(ao_plugin_local_data.ao_plugins)
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free(ao_plugin_local_data.ao_plugins);
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}
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// stop playing and empty buffers (for seeking/pause)
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static void reset(){
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int i=0;
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driver()->reset();
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while(plugin(i))
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plugin(i++)->reset();
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}
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// stop playing, keep buffers (for pause)
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static void audio_pause(){
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driver()->pause();
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}
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// resume playing, after audio_pause()
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static void audio_resume(){
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driver()->resume();
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}
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// return: how many bytes can be played without blocking
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static int get_space(){
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double sz=(double)(driver()->get_space());
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sz*=ao_plugin_data.sz_mult;
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sz+=ao_plugin_data.sz_fix;
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return (int)(sz);
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}
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// plays 'len' bytes of 'data'
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// return: number of bytes played
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static int play(void* data,int len,int flags){
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int i=0;
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/* Due to constant buffer sizes in plugins limit length */
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int tmp = get_space();
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int ret_len =(tmp<len)?tmp:len;
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/* Filter data */
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ao_plugin_data.len=ret_len;
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ao_plugin_data.data=data;
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while(plugin(i))
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plugin(i++)->play();
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/* Send data to output */
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len=driver()->play(ao_plugin_data.data,ao_plugin_data.len,flags);
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if(len!=ao_plugin_data.len)
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printf("Buffer over flow in sound plugin ");
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return ret_len;
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}
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// return: delay in seconds between first and last sample in buffer
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static float get_delay(){
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float delay=driver()->get_delay();
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delay*=ao_plugin_data.delay_mult;
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delay+=ao_plugin_data.delay_fix;
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return delay;
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}
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