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now supports float based operation aswell 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14625 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
alex 2005-01-31 11:46:01 +00:00
parent 4ec530c8a0
commit bf4b07cf12
1 changed files with 40 additions and 5 deletions
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45
libaf/af_extrastereo.c
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@ -25,22 +25,35 @@ typedef struct af_extrastereo_s
float mul;
}af_extrastereo_t;
static af_data_t* play_s16(struct af_instance_s* af, af_data_t* data);
static af_data_t* play_float(struct af_instance_s* af, af_data_t* data);
// Initialization and runtime control
static int control(struct af_instance_s* af, int cmd, void* arg)
{
af_extrastereo_t* s = (af_extrastereo_t*)af->setup;
switch(cmd){
case AF_CONTROL_REINIT:
case AF_CONTROL_REINIT:{
// Sanity check
if(!arg) return AF_ERROR;
af->data->rate = ((af_data_t*)arg)->rate;
af->data->nch = 2;
af->data->format = AF_FORMAT_S16_NE;
af->data->bps = 2;
if (((af_data_t*)arg)->format == AF_FORMAT_FLOAT_NE)
{
af->data->format = AF_FORMAT_FLOAT_NE;
af->data->bps = 4;
af->play = play_float;
}// else
{
af->data->format = AF_FORMAT_S16_NE;
af->data->bps = 2;
af->play = play_s16;
}
return af_test_output(af,(af_data_t*)arg);
}
case AF_CONTROL_COMMAND_LINE:{
float f;
sscanf((char*)arg,"%f", &f);
@ -67,7 +80,7 @@ static void uninit(struct af_instance_s* af)
}
// Filter data through filter
static af_data_t* play(struct af_instance_s* af, af_data_t* data)
static af_data_t* play_s16(struct af_instance_s* af, af_data_t* data)
{
af_extrastereo_t *s = af->setup;
register int i = 0;
@ -89,11 +102,33 @@ static af_data_t* play(struct af_instance_s* af, af_data_t* data)
return data;
}
static af_data_t* play_float(struct af_instance_s* af, af_data_t* data)
{
af_extrastereo_t *s = af->setup;
register int i = 0;
float *a = (float*)data->audio; // Audio data
int len = data->len/4; // Number of samples
float avg, l, r;
for (i = 0; i < len; i+=2)
{
avg = (a[i] + a[i + 1]) / 2;
l = avg + (s->mul * (a[i] - avg));
r = avg + (s->mul * (a[i + 1] - avg));
a[i] = af_softclip(l);
a[i + 1] = af_softclip(r);
}
return data;
}
// Allocate memory and set function pointers
static int open(af_instance_t* af){
af->control=control;
af->uninit=uninit;
af->play=play;
af->play=play_s16;
af->mul.n=1;
af->mul.d=1;
af->data=calloc(1,sizeof(af_data_t));