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Adding volume control and moving control() call parameters to a seperate file

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7746 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
anders 2002-10-16 01:49:40 +00:00
parent dd84f32ef0
commit 4d6e54d22d
6 changed files with 333 additions and 55 deletions
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4
libaf/Makefile
View File

@ -2,7 +2,7 @@ include ../config.mak
LIBNAME = libaf.a
SRCS=af.c af_dummy.c af_delay.c af_channels.c af_format.c af_resample.c window.c filter.c
SRCS=af.c af_dummy.c af_delay.c af_channels.c af_format.c af_resample.c window.c filter.c af_volume.c
OBJS=$(SRCS:.c=.o)
@ -15,7 +15,7 @@ CFLAGS = $(OPTFLAGS) -I. -Wall
$(LIBNAME): $(OBJS) Makefile
$(AR) r $(LIBNAME) $(OBJS)
$(OBJS):af.h dsp.h filter.h window.h
$(OBJS):af.h control.h dsp.h filter.h window.h
all: $(LIBNAME)

21
libaf/af.c
View File

@ -80,9 +80,10 @@ af_instance_t* af_create(af_stream_t* s, char* name)
}
// Initialize the new filter
if(AF_OK==new->info->open(new))
if(AF_OK == new->info->open(new) &&
AF_ERROR < new->control(new,AF_CONTROL_POST_CREATE,&s->cfg))
return new;
free(new);
mp_msg(MSGT_AFILTER,MSGL_ERR,"Couldn't create audio filter '%s'\n",name);
return NULL;
@ -141,6 +142,9 @@ void af_remove(af_stream_t* s, af_instance_t* af)
{
if(!af) return;
// Notify filter before changing anything
af->control(af,AF_CONTROL_PRE_DESTROY,0);
// Detach pointers
if(af->prev)
af->prev->next=af->next;
@ -255,7 +259,6 @@ void af_uninit(af_stream_t* s)
-1 if failure */
int af_init(af_stream_t* s)
{
int cfg=SLOW; // configuration type
int i=0;
// Sanity check
@ -266,13 +269,11 @@ int af_init(af_stream_t* s)
s->input.len = s->output.len = 0;
// Figure out how fast the machine is
if(s->cfg.force)
cfg=s->cfg.force;
else{
if(AF_INIT_AUTO == (AF_INIT_TYPE_MASK & s->cfg.force)){
# if defined(HAVE_SSE) || defined(HAVE_3DNOWEX)
cfg=FAST;
s->cfg.force = (s->cfg.force & ~AF_INIT_TYPE_MASK) | AF_INIT_FAST;
# else
cfg=SLOW;
s->cfg.force = (s->cfg.force & ~AF_INIT_TYPE_MASK) | AF_INIT_SLOW;
# endif
}
@ -296,12 +297,12 @@ int af_init(af_stream_t* s)
return -1;
// Check output format
if(cfg!=FORCE){
if((AF_INIT_TYPE_MASK & s->cfg.force) != AF_INIT_FORCE){
af_instance_t* af = NULL; // New filter
// Check output frequency if not OK fix with resample
if(s->last->data->rate!=s->output.rate){
if(NULL==(af=af_get(s,"resample"))){
if(cfg==SLOW){
if((AF_INIT_TYPE_MASK & s->cfg.force) == AF_INIT_SLOW){
if(!strcmp(s->first->info->name,"format"))
af = af_append(s,s->first,"resample");
else

60
libaf/af.h
View File

@ -1,3 +1,5 @@
#include "control.h"
#ifndef __aop_h__
#define __aop_h__
@ -53,10 +55,12 @@ typedef struct af_instance_s
the length of the buffer. */
}af_instance_t;
// Initialization types
#define SLOW 1
#define FAST 2
#define FORCE 3
// Initialization flags
#define AF_INIT_AUTO 0x00000000
#define AF_INIT_SLOW 0x00000001
#define AF_INIT_FAST 0x00000002
#define AF_INIT_FORCE 0x00000003
#define AF_INIT_TYPE_MASK 0x00000003
// Configuration switches
typedef struct af_cfg_s{
@ -78,43 +82,6 @@ typedef struct af_stream_s
af_cfg_t cfg;
}af_stream_t;
/*********************************************
// Control parameters
*/
/* The control system is divided into 3 levels
mandatory calls - all filters must answer to all of these
optional calls - are optional
filter specific calls - applies only to some filters
*/
#define AF_CONTROL_MANDATORY_BASE 0
#define AF_CONTROL_OPTIONAL_BASE 100
#define AF_CONTROL_FILTER_SPECIFIC_BASE 200
// MANDATORY CALLS
/* Reinitialize filter. The optional argument contains the new
configuration in form of a af_data_t struct. If the filter does not
support the new format the struct should be changed and AF_FALSE
should be returned. If the incoming and outgoing data streams are
identical the filter can return AF_DETACH. This will remove the
filter. */
#define AF_CONTROL_REINIT 1 + AF_CONTROL_MANDATORY_BASE
// OPTIONAL CALLS
// FILTER SPECIFIC CALLS
// Set output rate in resample
#define AF_CONTROL_RESAMPLE 1 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Set output format in format
#define AF_CONTROL_FORMAT 2 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Set number of output channels in channels
#define AF_CONTROL_CHANNELS 3 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Set delay length in delay
#define AF_CONTROL_SET_DELAY_LEN 4 + AF_CONTROL_FILTER_SPECIFIC_BASE
/*********************************************
// Return values
*/
@ -129,7 +96,9 @@ typedef struct af_stream_s
/*********************************************
// Export functions
*/
/* Initialize the stream "s". This function creates a new fileterlist
if nessesary according to the values set in input and output. Input
@ -201,6 +170,7 @@ int af_lencalc(frac_t mul, af_data_t* data);
#define RESIZE_LOCAL_BUFFER(a,d)\
((a->data->len < af_lencalc(a->mul,d))?af_resize_local_buffer(a,d):AF_OK)
/* Some other useful macro definitions*/
#ifndef min
#define min(a,b)(((a)>(b))?(b):(a))
#endif
@ -209,4 +179,12 @@ int af_lencalc(frac_t mul, af_data_t* data);
#define max(a,b)(((a)>(b))?(a):(b))
#endif
#ifndef clamp
#define clamp(a,min,max) (((a)>(max))?(max):(((a)<(min))?(min):(a)))
#endif
#ifndef sign
#define sign(a) (((x)>0)?(1):(-1))
#endif
#endif

4
libaf/af_delay.c
View File

@ -30,9 +30,9 @@ static int control(struct af_instance_s* af, int cmd, void* arg)
af->data->format = ((af_data_t*)arg)->format;
af->data->bps = ((af_data_t*)arg)->bps;
return af->control(af,AF_CONTROL_SET_DELAY_LEN,&((af_delay_t*)af->setup)->tlen);
return af->control(af,AF_CONTROL_DELAY_SET_LEN,&((af_delay_t*)af->setup)->tlen);
}
case AF_CONTROL_SET_DELAY_LEN:{
case AF_CONTROL_DELAY_SET_LEN:{
af_delay_t* s = (af_delay_t*)af->setup;
void* bt = s->buf; // Old buffer
int lt = s->len; // Old len

222
libaf/af_volume.c Normal file
View File

@ -0,0 +1,222 @@
/* This audio filter changes the volume of the sound, and can be used
when the mixer doesn't support the PCM channel. It can handel
between 1 and 6 channels. The volume can be adjusted between -60dB
to +10dB and is set on a per channels basis. The volume can be
written ad read by AF_CONTROL_VOLUME_SET and AF_CONTROL_VOLUME_GET
respectivly.
The plugin has support for softclipping, it is enabled by
AF_CONTROL_VOLUME_SOFTCLIPP. It has also a probing feature which
can be used to measure the power in the audio stream, both an
instantanious value and the maximum value can be probed. The
probing is enable by AF_CONTROL_VOLUME_PROBE_ON_OFF and is done on a
per channel basis. The result from the probing is obtained using
AF_CONTROL_VOLUME_PROBE_GET and AF_CONTROL_VOLUME_PROBE_GET_MAX. The
probed values are calculated in dB. The control of the volume can
be turned off by the AF_CONTROL_VOLUME_ON_OFF switch.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <inttypes.h>
#include <math.h>
#include "../config.h"
#include "../mp_msg.h"
#include "af.h"
// Some limits
#define MIN_S16 -32650
#define MAX_S16 32650
#define MAX_VOL +10.0
#define MIN_VOL -60.0
// Number of channels
#define NCH 6
#include "../libao2/afmt.h"
// Data for specific instances of this filter
typedef struct af_volume_s
{
double volume[NCH]; // Volume for each channel
double power[NCH]; // Instantaneous power in each channel
double maxpower[NCH]; // Maximum power in each channel
double alpha; // Forgetting factor for power estimate
int softclip; // Soft clippng on/off
int probe; // Probing on/off
int onoff; // Volume control on/off
}af_volume_t;
/* Convert to gain value from dB. Returns AF_OK if of and AF_ERROR if
fail */
inline int from_dB(double* in, double* out)
{
int i = 0;
// Sanity check
if(!in || !out)
return AF_ERROR;
for(i=0;i<NCH;i++)
out[i]=pow(10.0,clamp(in[i],MIN_VOL,MAX_VOL)/10.0);
return AF_OK;
}
/* Convert from gain value to dB. Returns AF_OK if of and AF_ERROR if
fail */
inline int to_dB(double* in, double* out)
{
int i = 0;
// Sanity check
if(!in || !out)
return AF_ERROR;
for(i=0;i<NCH;i++)
out[i]=10.0*log10(clamp(in[i],MIN_VOL,MAX_VOL));
return AF_OK;
}
// Initialization and runtime control
static int control(struct af_instance_s* af, int cmd, void* arg)
{
af_volume_t* s = (af_volume_t*)af->setup;
switch(cmd){
case AF_CONTROL_REINIT:
// Sanity check
if(!arg) return AF_ERROR;
af->data->rate = ((af_data_t*)arg)->rate;
af->data->nch = ((af_data_t*)arg)->nch;
af->data->format = AFMT_S16_LE;
af->data->bps = 2;
// Time constant set to 0.1s
s->alpha = (1.0/0.2)/(2.0*M_PI*(double)((af_data_t*)arg)->rate);
// Only AFMT_S16_LE is supported for now
if(af->data->format != ((af_data_t*)arg)->format ||
af->data->bps != ((af_data_t*)arg)->bps)
return AF_FALSE;
return AF_OK;
case AF_CONTROL_VOLUME_SET:
return from_dB((double*)arg,s->volume);
case AF_CONTROL_VOLUME_GET:
return to_dB(s->volume,(double*)arg);
case AF_CONTROL_VOLUME_PROBE_GET:
return to_dB(s->power,(double*)arg);
case AF_CONTROL_VOLUME_PROBE_GET_MAX:
return to_dB(s->maxpower,(double*)arg);
case AF_CONTROL_VOLUME_SOFTCLIP:
s->softclip = (int)arg;
return AF_OK;
case AF_CONTROL_VOLUME_PROBE_ON_OFF:
s->probe = (int)arg;
return AF_OK;
case AF_CONTROL_VOLUME_ON_OFF:
s->onoff = (int)arg;
return AF_OK;
}
return AF_UNKNOWN;
}
// Deallocate memory
static void uninit(struct af_instance_s* af)
{
if(af->data)
free(af->data);
if(af->setup)
free(af->setup);
}
// Filter data through filter
static af_data_t* play(struct af_instance_s* af, af_data_t* data)
{
af_data_t* c = data; // Current working data
af_volume_t* s = (af_volume_t*)af->setup; // Setup for this instance
int16_t* a = (int16_t*)c->audio; // Audio data
int len = c->len/2; // Number of samples
int ch = 0; // Channel counter
register int nch = c->nch; // Number of channels
register int i = 0;
// Probe the data stream
if(s->probe){
for(ch = 0; ch < nch ; ch++){
double alpha = s->alpha;
double beta = 1 - alpha;
double pow = s->power[ch];
double maxpow = s->maxpower[ch];
register double t = 0;
for(i=ch;i<len;i+=nch){
t = ((double)a[i])/32768.0;
t *= t;
// Check maximum power value
if(t>maxpow)
maxpow=t;
// Power estimate made using first order AR model
if(t>pow)
pow=t;
else
pow = beta*pow+alpha*t;
}
s->power[ch] = pow;
s->maxpower[ch] = maxpow;
}
}
// Change the volume.
if(s->onoff){
register int sc = s->softclip;
for(ch = 0; ch < nch ; ch++){
register int vol = (int)(255.0 * s->volume[ch]);
for(i=ch;i<len;i+=nch){
register int x;
x=(a[i] * vol) >> 8;
if(sc){
int64_t t=x*x;
t=(t*x) >> 30;
x = (3*x - (int)t) >> 1;
}
a[i]=clamp(x,MIN_S16,MAX_S16);
}
}
}
return c;
}
// Allocate memory and set function pointers
static int open(af_instance_t* af){
int i = 0;
af->control=control;
af->uninit=uninit;
af->play=play;
af->mul.n=1;
af->mul.d=1;
af->data=calloc(1,sizeof(af_data_t));
af->setup=calloc(1,sizeof(af_volume_t));
if(af->data == NULL || af->setup == NULL)
return AF_ERROR;
// Enable volume control and set initial volume to 0.1
((af_volume_t*)af->setup)->onoff = 1;
for(i=0;i<NCH;i++)
((af_volume_t*)af->setup)->volume[i]=0.1;
return AF_OK;
}
// Description of this filter
af_info_t af_info_volume = {
"Volume control audio filter",
"volume",
"Anders",
"",
AF_FLAGS_NOT_REENTRANT,
open
};

77
libaf/control.h Normal file
View File

@ -0,0 +1,77 @@
#ifndef __af_control_h
#define __af_control_h
/*********************************************
// Control parameters
*/
/* The control system is divided into 3 levels
mandatory calls - all filters must answer to all of these
optional calls - are optional
filter specific calls - applies only to some filters
*/
#define AF_CONTROL_MANDATORY_BASE 0
#define AF_CONTROL_OPTIONAL_BASE 100
#define AF_CONTROL_FILTER_SPECIFIC_BASE 200
// MANDATORY CALLS
/* Reinitialize filter. The optional argument contains the new
configuration in form of a af_data_t struct. If the filter does not
support the new format the struct should be changed and AF_FALSE
should be returned. If the incoming and outgoing data streams are
identical the filter can return AF_DETACH. This will remove the
filter. */
#define AF_CONTROL_REINIT 01 + AF_CONTROL_MANDATORY_BASE
// OPTIONAL CALLS
/* Called just after creation with the af_cfg for the stream in which
the filter resides as input parameter this call can be used by the
filter to initialize itself using commandline parameters */
#define AF_CONTROL_POST_CREATE 1 + AF_CONTROL_OPTIONAL_BASE
// Called just before destruction of a filter
#define AF_CONTROL_PRE_DESTROY 2 + AF_CONTROL_OPTIONAL_BASE
// FILTER SPECIFIC CALLS
// Set output rate in resample
#define AF_CONTROL_RESAMPLE 1 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Set output format in format
#define AF_CONTROL_FORMAT 2 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Set number of output channels in channels
#define AF_CONTROL_CHANNELS 3 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Set delay length in delay
#define AF_CONTROL_DELAY_SET_LEN 4 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Volume
// Set volume level, arg is a float* with the volume for all the channels
#define AF_CONTROL_VOLUME_SET 5 + AF_CONTROL_FILTER_SPECIFIC_BASE
/* Get volume level for all channels, arg is a float* that will
contain the volume for all the channels */
#define AF_CONTROL_VOLUME_GET 6 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Turn volume control on and off, arg is binary
#define AF_CONTROL_VOLUME_ON_OFF 7 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Turn soft clipping of the volume on and off, arg is binary
#define AF_CONTROL_VOLUME_SOFTCLIP 8 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Get the probed power level for all channels, arg is a float*
#define AF_CONTROL_VOLUME_PROBE_GET 9 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Get the maximum probed power level for all channels, arg is a float*
#define AF_CONTROL_VOLUME_PROBE_GET_MAX 10 + AF_CONTROL_FILTER_SPECIFIC_BASE
// Turn probing on and off, arg is binary
#define AF_CONTROL_VOLUME_PROBE_ON_OFF 11 + AF_CONTROL_FILTER_SPECIFIC_BASE
#endif /*__af_control_h */