mirror of https://github.com/mpv-player/mpv
Adding SW volume control
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4860 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -106,6 +106,7 @@ struct config ao_plugin_conf[]={
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{"delay", &ao_plugin_cfg.pl_delay_len, CONF_TYPE_INT, CONF_MIN, 0, 0, NULL},
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{"format", &ao_plugin_cfg.pl_format_type, CONF_TYPE_INT, CONF_MIN, 0, 0, NULL},
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{"fout", &ao_plugin_cfg.pl_resample_fout, CONF_TYPE_INT, CONF_MIN, 0, 0, NULL},
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{"volume", &ao_plugin_cfg.pl_volume_volume, CONF_TYPE_INT, CONF_RANGE, 0, 255, NULL},
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{NULL, NULL, 0, 0, 0, 0, NULL}
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};
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@ -141,7 +142,7 @@ static config_t mplayer_opts[]={
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// {"dsp", &dsp, CONF_TYPE_STRING, CONF_NOCFG, 0, 0, NULL},
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{"dsp", "Use -ao oss:dsp_path!\n", CONF_TYPE_PRINT, CONF_NOCFG, 0, 0, NULL},
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{"mixer", &mixer_device, CONF_TYPE_STRING, 0, 0, 0, NULL},
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{"master", "Option -master was obsolete and has been removed\n" , CONF_TYPE_PRINT, CONF_NOCFG, 0, 0, NULL},
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{"master", "Option -master has been removed, use -aop list=volume instead.\n", CONF_TYPE_PRINT, 0, 0, 0, NULL},
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{"channels", &audio_output_channels, CONF_TYPE_INT, CONF_RANGE, 2, 6, NULL},
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#ifdef HAVE_X11
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{"display", &mDisplayName, CONF_TYPE_STRING, 0, 0, 0, NULL},
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@ -4,7 +4,7 @@ include config.mak
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LIBNAME = libao2.a
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# TODO: moveout ao_sdl.c so it's only used when SDL is detected
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SRCS=afmt.c audio_out.c ao_mpegpes.c ao_null.c ao_pcm.c ao_plugin.c pl_delay.c pl_format.c pl_surround.c remez.c pl_resample.c $(OPTIONAL_SRCS)
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SRCS=afmt.c audio_out.c ao_mpegpes.c ao_null.c ao_pcm.c ao_plugin.c pl_delay.c pl_format.c pl_surround.c remez.c pl_resample.c pl_volume.c $(OPTIONAL_SRCS)
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OBJS=$(SRCS:.c=.o)
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@ -36,8 +36,8 @@ typedef struct ao_plugin_local_data_s
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static ao_plugin_local_data_t ao_plugin_local_data={NULL,0,0.0,NULL,NULL,AO_PLUGINS};
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// global data
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volatile ao_plugin_data_t ao_plugin_data; // Data used by the plugins
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volatile ao_plugin_cfg_t ao_plugin_cfg=CFG_DEFAULTS; // Set in cfg-mplayer.h
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ao_plugin_data_t ao_plugin_data; // Data used by the plugins
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ao_plugin_cfg_t ao_plugin_cfg=CFG_DEFAULTS; // Set in cfg-mplayer.h
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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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@ -45,6 +45,15 @@ static int control(int cmd,int arg){
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case AOCONTROL_SET_PLUGIN_DRIVER:
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ao_plugin_local_data.driver=(ao_functions_t*)arg;
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return CONTROL_OK;
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case AOCONTROL_GET_VOLUME:
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case AOCONTROL_SET_VOLUME:
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{
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int r=audio_plugin_volume.control(cmd,arg);
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if(CONTROL_OK != r)
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return driver()->control(cmd,arg);
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else
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return r;
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}
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default:
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return driver()->control(cmd,arg);
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}
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@ -35,27 +35,30 @@ typedef struct ao_plugin_cfg_s
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int pl_format_type; // Output format
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int pl_delay_len; // Number of samples to delay sound output
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int pl_resample_fout; // Output frequency from resampling
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int pl_volume_volume; // Initial volume setting
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} ao_plugin_cfg_t;
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extern volatile ao_plugin_cfg_t ao_plugin_cfg;
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extern ao_plugin_cfg_t ao_plugin_cfg;
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// Configuration defaults
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#define CFG_DEFAULTS { \
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NULL, \
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AFMT_S16_LE, \
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0, \
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48000 \
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48000, \
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255 \
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};
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// This block should not be available in the pl_xxxx files
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// due to compilation issues
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#ifndef PLUGIN
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#define NPL 4+1 // Number of PLugins ( +1 list ends with NULL )
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#define NPL 5+1 // Number of PLugins ( +1 list ends with NULL )
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// List of plugins
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extern ao_plugin_functions_t audio_plugin_delay;
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extern ao_plugin_functions_t audio_plugin_format;
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extern ao_plugin_functions_t audio_plugin_surround;
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extern ao_plugin_functions_t audio_plugin_resample;
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extern ao_plugin_functions_t audio_plugin_volume;
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#define AO_PLUGINS { \
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@ -63,6 +66,7 @@ extern ao_plugin_functions_t audio_plugin_resample;
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&audio_plugin_format, \
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&audio_plugin_surround, \
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&audio_plugin_resample, \
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&audio_plugin_volume, \
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NULL \
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}
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#endif /* PLUGIN */
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@ -0,0 +1,133 @@
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/* This audio output plugin changes the volume of the sound, and can
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be used when the mixer doesn't support the PCM channel. The volume
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is set in fixed steps between 0 - 2^8. */
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#define PLUGIN
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include "audio_out.h"
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#include "audio_plugin.h"
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#include "audio_plugin_internal.h"
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#include "afmt.h"
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static ao_info_t info =
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{
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"Volume control audio plugin",
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"volume",
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"Anders",
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""
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};
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LIBAO_PLUGIN_EXTERN(volume)
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// local data
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typedef struct pl_volume_s
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{
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uint16_t volume; // output volume level
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int inuse; // This plugin is in use TRUE, FALSE
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int format; // sample fomat
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} pl_volume_t;
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static pl_volume_t pl_volume={0,0,0};
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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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switch(cmd){
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case AOCONTROL_PLUGIN_SET_LEN:
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return CONTROL_OK;
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case AOCONTROL_GET_VOLUME:{
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if(pl_volume.inuse){
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((ao_control_vol_t *)arg)->right=((float)pl_volume.volume)/2.55;
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((ao_control_vol_t *)arg)->left=((float)pl_volume.volume)/2.55;
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return CONTROL_OK;
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}
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else
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return CONTROL_ERROR;
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}
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case AOCONTROL_SET_VOLUME:{
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if(pl_volume.inuse){
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// Calculate avarage between left and right
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float vol =2.55*((((ao_control_vol_t *)arg)->right)+(((ao_control_vol_t *)arg)->left))/2;
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pl_volume.volume=(uint16_t)vol;
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// Volume must be between 0 and 255
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if(vol > 255)
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pl_volume.volume = 0xFF;
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if(vol < 0)
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pl_volume.volume = 0;
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return CONTROL_OK;
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}
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else
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return CONTROL_ERROR;
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}
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}
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return CONTROL_UNKNOWN;
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}
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// open & setup audio device
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// return: 1=success 0=fail
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static int init(){
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// Sanity sheck this plugin supports AFMT_U8 and AFMT_S16_LE
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switch(ao_plugin_data.format){
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case(AFMT_U8):
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case(AFMT_S16_LE):
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break;
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default:
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fprintf(stderr,"[pl_volume] Audio format not yet suported \n");
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return 0;
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}
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// Initialize volume to this value
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pl_volume.volume=ao_plugin_cfg.pl_volume_volume;
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pl_volume.format=ao_plugin_data.format;
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/* The inuse flag is used in control to detremine if the return
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value since that function always is called from ao_plugin regardless
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of wether this plugin is in use or not. */
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pl_volume.inuse=1;
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// Tell the world what we are up to
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printf("[pl_volume] Software volume control in use.\n");
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return 1;
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}
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// close plugin
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static void uninit(){
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pl_volume.inuse=0;
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}
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// empty buffers
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static void reset(){
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}
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// processes 'ao_plugin_data.len' bytes of 'data'
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// called for every block of data
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static int play(){
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register int i=0;
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// Change the volume.
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switch(pl_volume.format){
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case(AFMT_U8):{
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register uint8_t* data=(uint8_t*)ao_plugin_data.data;
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for(i=0;i<ao_plugin_data.len;i++){
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data[i]=(((data[i]-128) * pl_volume.volume) >> 8) + 128;
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}
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break;
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}
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case(AFMT_S16_LE):{
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register int len=ao_plugin_data.len>>1;
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register int16_t* data=(int16_t*)ao_plugin_data.data;
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for(i=0;i<len;i++)
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data[i]=(data[i]* pl_volume.volume)>>8;
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break;
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}
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default:
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return 0;
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}
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return 1;
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}
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