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Changed resampler to use long sizes and pointers instead of int

CQTexperiment
Chris Moeller 2013-10-13 22:33:18 -07:00
parent ad7979f16e
commit 33843a13d9
2 changed files with 22 additions and 40 deletions
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56
Frameworks/vio2sf/vio2sf/src/vio2sf/desmume/lanczos_resampler.c
View File

@ -37,10 +37,10 @@ void lanczos_init()
typedef struct lanczos_resampler
{
int write_pos, write_filled;
int read_pos, read_filled;
long write_pos, write_filled;
long read_pos, read_filled;
unsigned short phase;
unsigned int phase_inc;
unsigned long phase_inc;
float buffer_in[lanczos_buffer_size * 2];
int buffer_out[lanczos_buffer_size];
} lanczos_resampler;
@ -67,31 +67,13 @@ void lanczos_resampler_delete(void * _r)
free( _r );
}
void * lanczos_resampler_dup(void * _r)
{
lanczos_resampler * r_in = ( lanczos_resampler * ) _r;
lanczos_resampler * r_out = ( lanczos_resampler * ) malloc( sizeof(lanczos_resampler) );
if ( !r_out ) return 0;
r_out->write_pos = r_in->write_pos;
r_out->write_filled = r_in->write_filled;
r_out->read_pos = r_in->read_pos;
r_out->read_filled = r_in->read_filled;
r_out->phase = r_in->phase;
r_out->phase_inc = r_in->phase_inc;
memcpy( r_out->buffer_in, r_in->buffer_in, sizeof(r_in->buffer_in) );
memcpy( r_out->buffer_out, r_in->buffer_out, sizeof(r_in->buffer_out) );
return r_out;
}
int lanczos_resampler_get_free_count(void *_r)
long lanczos_resampler_get_free_count(void *_r)
{
lanczos_resampler * r = ( lanczos_resampler * ) _r;
return lanczos_buffer_size - r->write_filled;
}
int lanczos_resampler_ready(void *_r)
long lanczos_resampler_ready(void *_r)
{
lanczos_resampler * r = ( lanczos_resampler * ) _r;
return r->write_filled > (LANCZOS_WIDTH * 2);
@ -110,7 +92,7 @@ void lanczos_resampler_clear(void *_r)
void lanczos_resampler_set_rate(void *_r, double new_factor)
{
lanczos_resampler * r = ( lanczos_resampler * ) _r;
r->phase_inc = (int)( new_factor * LANCZOS_RESOLUTION );
r->phase_inc = (long)( new_factor * LANCZOS_RESOLUTION );
}
void lanczos_resampler_write_sample(void *_r, int s)
@ -130,28 +112,28 @@ void lanczos_resampler_write_sample(void *_r, int s)
}
}
static int lanczos_resampler_run(lanczos_resampler * r, int ** out_, int * out_end)
static long lanczos_resampler_run(lanczos_resampler * r, int ** out_, int * out_end)
{
int in_size = r->write_filled;
long in_size = r->write_filled;
float const* in_ = r->buffer_in + lanczos_buffer_size + r->write_pos - r->write_filled;
int used = 0;
long used = 0;
in_size -= LANCZOS_WIDTH * 2;
if ( in_size > 0 )
{
int* out = *out_;
float const* in = in_;
float const* const in_end = in + in_size;
int phase = r->phase;
int phase_inc = r->phase_inc;
long phase = r->phase;
long phase_inc = r->phase_inc;
int step = phase_inc > LANCZOS_RESOLUTION ? LANCZOS_RESOLUTION * LANCZOS_RESOLUTION / phase_inc : LANCZOS_RESOLUTION;
long step = phase_inc > LANCZOS_RESOLUTION ? LANCZOS_RESOLUTION * LANCZOS_RESOLUTION / phase_inc : LANCZOS_RESOLUTION;
do
{
// accumulate in extended precision
double kernel[LANCZOS_WIDTH * 2], kernel_sum = 0.0;
int i = LANCZOS_WIDTH;
int phase_adj = phase * step / LANCZOS_RESOLUTION;
long i = LANCZOS_WIDTH;
long phase_adj = phase * step / LANCZOS_RESOLUTION;
double sample;
if ( out >= out_end )
@ -159,8 +141,8 @@ static int lanczos_resampler_run(lanczos_resampler * r, int ** out_, int * out_e
for (; i >= -LANCZOS_WIDTH + 1; --i)
{
int pos = i * step;
kernel_sum += kernel[i + LANCZOS_WIDTH - 1] = lanczos_lut[abs(phase_adj - pos)];
long pos = i * step;
kernel_sum += kernel[i + LANCZOS_WIDTH - 1] = lanczos_lut[labs(phase_adj - pos)];
}
for (sample = 0, i = 0; i < LANCZOS_WIDTH * 2; ++i)
sample += in[i] * kernel[i];
@ -190,8 +172,8 @@ static void lanczos_resampler_fill(lanczos_resampler * r)
while ( r->write_filled > (LANCZOS_WIDTH * 2) &&
r->read_filled < lanczos_buffer_size )
{
int write_pos = ( r->read_pos + r->read_filled ) % lanczos_buffer_size;
int write_size = lanczos_buffer_size - write_pos;
long write_pos = ( r->read_pos + r->read_filled ) % lanczos_buffer_size;
long write_size = lanczos_buffer_size - write_pos;
int * out = r->buffer_out + write_pos;
if ( write_size > ( lanczos_buffer_size - r->read_filled ) )
write_size = lanczos_buffer_size - r->read_filled;
@ -200,7 +182,7 @@ static void lanczos_resampler_fill(lanczos_resampler * r)
}
}
int lanczos_resampler_get_sample_count(void *_r)
long lanczos_resampler_get_sample_count(void *_r)
{
lanczos_resampler * r = ( lanczos_resampler * ) _r;
if ( r->read_filled < 1 )

6
Frameworks/vio2sf/vio2sf/src/vio2sf/desmume/lanczos_resampler.h
View File

@ -10,12 +10,12 @@ void lanczos_init();
void * lanczos_resampler_create();
void lanczos_resampler_delete(void *);
int lanczos_resampler_get_free_count(void *);
long lanczos_resampler_get_free_count(void *);
void lanczos_resampler_write_sample(void *, int sample);
void lanczos_resampler_set_rate( void *, double new_factor );
int lanczos_resampler_ready(void *);
long lanczos_resampler_ready(void *);
void lanczos_resampler_clear(void *);
int lanczos_resampler_get_sample_count(void *);
long lanczos_resampler_get_sample_count(void *);
int lanczos_resampler_get_sample(void *);
void lanczos_resampler_remove_sample(void *);