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#include <stdlib.h>
#include <string.h>
#ifndef WIN32
#include "config.h"
#endif
#ifdef ENABLE_NLS
#include <libintl.h>
#endif
#define _ISOC9X_SOURCE 1
#define _ISOC99_SOURCE 1
#define __USE_ISOC99 1
#define __USE_ISOC9X 1
#include <math.h>
#include "ladspa.h"
#ifdef WIN32
#define _WINDOWS_DLL_EXPORT_ __declspec(dllexport)
int bIsFirstTime = 1;
void _init(); // forward declaration
#else
#define _WINDOWS_DLL_EXPORT_
#endif
#line 10 "surround_encoder_1401.xml"
#include "ladspa-util.h"
#define D_SIZE 256
#define NZEROS 200
/* The non-zero taps of the Hilbert transformer */
static float xcoeffs[] = {
+0.0008103736f, +0.0008457886f, +0.0009017196f, +0.0009793364f,
+0.0010798341f, +0.0012044365f, +0.0013544008f, +0.0015310235f,
+0.0017356466f, +0.0019696659f, +0.0022345404f, +0.0025318040f,
+0.0028630784f, +0.0032300896f, +0.0036346867f, +0.0040788644f,
+0.0045647903f, +0.0050948365f, +0.0056716186f, +0.0062980419f,
+0.0069773575f, +0.0077132300f, +0.0085098208f, +0.0093718901f,
+0.0103049226f, +0.0113152847f, +0.0124104218f, +0.0135991079f,
+0.0148917649f, +0.0163008758f, +0.0178415242f, +0.0195321089f,
+0.0213953037f, +0.0234593652f, +0.0257599469f, +0.0283426636f,
+0.0312667947f, +0.0346107648f, +0.0384804823f, +0.0430224431f,
+0.0484451086f, +0.0550553725f, +0.0633242001f, +0.0740128560f,
+0.0884368322f, +0.1090816773f, +0.1412745301f, +0.1988673273f,
+0.3326528346f, +0.9997730178f, -0.9997730178f, -0.3326528346f,
-0.1988673273f, -0.1412745301f, -0.1090816773f, -0.0884368322f,
-0.0740128560f, -0.0633242001f, -0.0550553725f, -0.0484451086f,
-0.0430224431f, -0.0384804823f, -0.0346107648f, -0.0312667947f,
-0.0283426636f, -0.0257599469f, -0.0234593652f, -0.0213953037f,
-0.0195321089f, -0.0178415242f, -0.0163008758f, -0.0148917649f,
-0.0135991079f, -0.0124104218f, -0.0113152847f, -0.0103049226f,
-0.0093718901f, -0.0085098208f, -0.0077132300f, -0.0069773575f,
-0.0062980419f, -0.0056716186f, -0.0050948365f, -0.0045647903f,
-0.0040788644f, -0.0036346867f, -0.0032300896f, -0.0028630784f,
-0.0025318040f, -0.0022345404f, -0.0019696659f, -0.0017356466f,
-0.0015310235f, -0.0013544008f, -0.0012044365f, -0.0010798341f,
-0.0009793364f, -0.0009017196f, -0.0008457886f, -0.0008103736f,
};
#define SURROUNDENCODER_L 0
#define SURROUNDENCODER_R 1
#define SURROUNDENCODER_C 2
#define SURROUNDENCODER_S 3
#define SURROUNDENCODER_LT 4
#define SURROUNDENCODER_RT 5
static LADSPA_Descriptor *surroundEncoderDescriptor = NULL;
typedef struct {
LADSPA_Data *l;
LADSPA_Data *r;
LADSPA_Data *c;
LADSPA_Data *s;
LADSPA_Data *lt;
LADSPA_Data *rt;
LADSPA_Data *buffer;
unsigned int buffer_pos;
unsigned int buffer_size;
LADSPA_Data *delay;
unsigned int dptr;
LADSPA_Data run_adding_gain;
} SurroundEncoder;
_WINDOWS_DLL_EXPORT_
const LADSPA_Descriptor *ladspa_descriptor(unsigned long index) {
#ifdef WIN32
if (bIsFirstTime) {
_init();
bIsFirstTime = 0;
}
#endif
switch (index) {
case 0:
return surroundEncoderDescriptor;
default:
return NULL;
}
}
static void activateSurroundEncoder(LADSPA_Handle instance) {
SurroundEncoder *plugin_data = (SurroundEncoder *)instance;
LADSPA_Data *buffer = plugin_data->buffer;
unsigned int buffer_pos = plugin_data->buffer_pos;
unsigned int buffer_size = plugin_data->buffer_size;
LADSPA_Data *delay = plugin_data->delay;
unsigned int dptr = plugin_data->dptr;
#line 75 "surround_encoder_1401.xml"
memset(buffer, 0, buffer_size * sizeof(LADSPA_Data));
plugin_data->buffer = buffer;
plugin_data->buffer_pos = buffer_pos;
plugin_data->buffer_size = buffer_size;
plugin_data->delay = delay;
plugin_data->dptr = dptr;
}
static void cleanupSurroundEncoder(LADSPA_Handle instance) {
#line 79 "surround_encoder_1401.xml"
SurroundEncoder *plugin_data = (SurroundEncoder *)instance;
free(plugin_data->buffer);
free(plugin_data->delay);
free(instance);
}
static void connectPortSurroundEncoder(
LADSPA_Handle instance,
unsigned long port,
LADSPA_Data *data) {
SurroundEncoder *plugin;
plugin = (SurroundEncoder *)instance;
switch (port) {
case SURROUNDENCODER_L:
plugin->l = data;
break;
case SURROUNDENCODER_R:
plugin->r = data;
break;
case SURROUNDENCODER_C:
plugin->c = data;
break;
case SURROUNDENCODER_S:
plugin->s = data;
break;
case SURROUNDENCODER_LT:
plugin->lt = data;
break;
case SURROUNDENCODER_RT:
plugin->rt = data;
break;
}
}
static LADSPA_Handle instantiateSurroundEncoder(
const LADSPA_Descriptor *descriptor,
unsigned long s_rate) {
SurroundEncoder *plugin_data = (SurroundEncoder *)malloc(sizeof(SurroundEncoder));
LADSPA_Data *buffer = NULL;
unsigned int buffer_pos;
unsigned int buffer_size;
LADSPA_Data *delay = NULL;
unsigned int dptr;
#line 65 "surround_encoder_1401.xml"
buffer_size = (int)(0.0072f * s_rate);
buffer_pos = 0;
buffer = calloc(buffer_size, sizeof(LADSPA_Data));
delay = calloc(D_SIZE, sizeof(LADSPA_Data));
dptr = 0;
plugin_data->buffer = buffer;
plugin_data->buffer_pos = buffer_pos;
plugin_data->buffer_size = buffer_size;
plugin_data->delay = delay;
plugin_data->dptr = dptr;
return (LADSPA_Handle)plugin_data;
}
#undef buffer_write
#undef RUN_ADDING
#undef RUN_REPLACING
#define buffer_write(b, v) (b = v)
#define RUN_ADDING 0
#define RUN_REPLACING 1
static void runSurroundEncoder(LADSPA_Handle instance, unsigned long sample_count) {
SurroundEncoder *plugin_data = (SurroundEncoder *)instance;
/* L (array of floats of length sample_count) */
const LADSPA_Data * const l = plugin_data->l;
/* R (array of floats of length sample_count) */
const LADSPA_Data * const r = plugin_data->r;
/* C (array of floats of length sample_count) */
const LADSPA_Data * const c = plugin_data->c;
/* S (array of floats of length sample_count) */
const LADSPA_Data * const s = plugin_data->s;
/* Lt (array of floats of length sample_count) */
LADSPA_Data * const lt = plugin_data->lt;
/* Rt (array of floats of length sample_count) */
LADSPA_Data * const rt = plugin_data->rt;
LADSPA_Data * buffer = plugin_data->buffer;
unsigned int buffer_pos = plugin_data->buffer_pos;
unsigned int buffer_size = plugin_data->buffer_size;
LADSPA_Data * delay = plugin_data->delay;
unsigned int dptr = plugin_data->dptr;
#line 85 "surround_encoder_1401.xml"
unsigned long pos;
LADSPA_Data s_delayed;
unsigned int i;
float hilb;
for (pos = 0; pos < sample_count; pos++) {
delay[dptr] = s[pos];
hilb = 0.0f;
for (i = 0; i <= NZEROS/2; i++) {
hilb += (xcoeffs[i] * delay[(dptr - i*2) & (D_SIZE - 1)]);
}
dptr = (dptr + 1) & (D_SIZE - 1);
s_delayed = buffer[buffer_pos];
buffer[buffer_pos++] = hilb;
buffer_pos %= buffer_size;
buffer_write(lt[pos], l[pos] + c[pos] * 0.707946f -
s_delayed * 0.707946f);
buffer_write(rt[pos], r[pos] + c[pos] * 0.707946f +
s_delayed * 0.707946f);
}
plugin_data->dptr = dptr;
plugin_data->buffer_pos = buffer_pos;
}
#undef buffer_write
#undef RUN_ADDING
#undef RUN_REPLACING
#define buffer_write(b, v) (b += (v) * run_adding_gain)
#define RUN_ADDING 1
#define RUN_REPLACING 0
static void setRunAddingGainSurroundEncoder(LADSPA_Handle instance, LADSPA_Data gain) {
((SurroundEncoder *)instance)->run_adding_gain = gain;
}
static void runAddingSurroundEncoder(LADSPA_Handle instance, unsigned long sample_count) {
SurroundEncoder *plugin_data = (SurroundEncoder *)instance;
LADSPA_Data run_adding_gain = plugin_data->run_adding_gain;
/* L (array of floats of length sample_count) */
const LADSPA_Data * const l = plugin_data->l;
/* R (array of floats of length sample_count) */
const LADSPA_Data * const r = plugin_data->r;
/* C (array of floats of length sample_count) */
const LADSPA_Data * const c = plugin_data->c;
/* S (array of floats of length sample_count) */
const LADSPA_Data * const s = plugin_data->s;
/* Lt (array of floats of length sample_count) */
LADSPA_Data * const lt = plugin_data->lt;
/* Rt (array of floats of length sample_count) */
LADSPA_Data * const rt = plugin_data->rt;
LADSPA_Data * buffer = plugin_data->buffer;
unsigned int buffer_pos = plugin_data->buffer_pos;
unsigned int buffer_size = plugin_data->buffer_size;
LADSPA_Data * delay = plugin_data->delay;
unsigned int dptr = plugin_data->dptr;
#line 85 "surround_encoder_1401.xml"
unsigned long pos;
LADSPA_Data s_delayed;
unsigned int i;
float hilb;
for (pos = 0; pos < sample_count; pos++) {
delay[dptr] = s[pos];
hilb = 0.0f;
for (i = 0; i <= NZEROS/2; i++) {
hilb += (xcoeffs[i] * delay[(dptr - i*2) & (D_SIZE - 1)]);
}
dptr = (dptr + 1) & (D_SIZE - 1);
s_delayed = buffer[buffer_pos];
buffer[buffer_pos++] = hilb;
buffer_pos %= buffer_size;
buffer_write(lt[pos], l[pos] + c[pos] * 0.707946f -
s_delayed * 0.707946f);
buffer_write(rt[pos], r[pos] + c[pos] * 0.707946f +
s_delayed * 0.707946f);
}
plugin_data->dptr = dptr;
plugin_data->buffer_pos = buffer_pos;
}
void _init() {
char **port_names;
LADSPA_PortDescriptor *port_descriptors;
LADSPA_PortRangeHint *port_range_hints;
#ifdef ENABLE_NLS
#define D_(s) dgettext(PACKAGE, s)
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, PACKAGE_LOCALE_DIR);
#else
#define D_(s) (s)
#endif
surroundEncoderDescriptor =
(LADSPA_Descriptor *)malloc(sizeof(LADSPA_Descriptor));
if (surroundEncoderDescriptor) {
surroundEncoderDescriptor->UniqueID = 1401;
surroundEncoderDescriptor->Label = "surroundEncoder";
surroundEncoderDescriptor->Properties =
LADSPA_PROPERTY_HARD_RT_CAPABLE;
surroundEncoderDescriptor->Name =
D_("Surround matrix encoder");
surroundEncoderDescriptor->Maker =
"Steve Harris <steve@plugin.org.uk>";
surroundEncoderDescriptor->Copyright =
"GPL";
surroundEncoderDescriptor->PortCount = 6;
port_descriptors = (LADSPA_PortDescriptor *)calloc(6,
sizeof(LADSPA_PortDescriptor));
surroundEncoderDescriptor->PortDescriptors =
(const LADSPA_PortDescriptor *)port_descriptors;
port_range_hints = (LADSPA_PortRangeHint *)calloc(6,
sizeof(LADSPA_PortRangeHint));
surroundEncoderDescriptor->PortRangeHints =
(const LADSPA_PortRangeHint *)port_range_hints;
port_names = (char **)calloc(6, sizeof(char*));
surroundEncoderDescriptor->PortNames =
(const char **)port_names;
/* Parameters for L */
port_descriptors[SURROUNDENCODER_L] =
LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
port_names[SURROUNDENCODER_L] =
D_("L");
port_range_hints[SURROUNDENCODER_L].HintDescriptor = 0;
/* Parameters for R */
port_descriptors[SURROUNDENCODER_R] =
LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
port_names[SURROUNDENCODER_R] =
D_("R");
port_range_hints[SURROUNDENCODER_R].HintDescriptor = 0;
/* Parameters for C */
port_descriptors[SURROUNDENCODER_C] =
LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
port_names[SURROUNDENCODER_C] =
D_("C");
port_range_hints[SURROUNDENCODER_C].HintDescriptor = 0;
/* Parameters for S */
port_descriptors[SURROUNDENCODER_S] =
LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
port_names[SURROUNDENCODER_S] =
D_("S");
port_range_hints[SURROUNDENCODER_S].HintDescriptor = 0;
/* Parameters for Lt */
port_descriptors[SURROUNDENCODER_LT] =
LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO;
port_names[SURROUNDENCODER_LT] =
D_("Lt");
port_range_hints[SURROUNDENCODER_LT].HintDescriptor = 0;
/* Parameters for Rt */
port_descriptors[SURROUNDENCODER_RT] =
LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO;
port_names[SURROUNDENCODER_RT] =
D_("Rt");
port_range_hints[SURROUNDENCODER_RT].HintDescriptor = 0;
surroundEncoderDescriptor->activate = activateSurroundEncoder;
surroundEncoderDescriptor->cleanup = cleanupSurroundEncoder;
surroundEncoderDescriptor->connect_port = connectPortSurroundEncoder;
surroundEncoderDescriptor->deactivate = NULL;
surroundEncoderDescriptor->instantiate = instantiateSurroundEncoder;
surroundEncoderDescriptor->run = runSurroundEncoder;
surroundEncoderDescriptor->run_adding = runAddingSurroundEncoder;
surroundEncoderDescriptor->set_run_adding_gain = setRunAddingGainSurroundEncoder;
}
}
void _fini() {
if (surroundEncoderDescriptor) {
free((LADSPA_PortDescriptor *)surroundEncoderDescriptor->PortDescriptors);
free((char **)surroundEncoderDescriptor->PortNames);
free((LADSPA_PortRangeHint *)surroundEncoderDescriptor->PortRangeHints);
free(surroundEncoderDescriptor);
}
}
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