void irmeasure_process(t_irmeasure *x, t_symbol *sym, short argc, t_atom *argv)
{
FFT_SETUP_D fft_setup;
FFT_SPLIT_COMPLEX_D spectrum_1;
FFT_SPLIT_COMPLEX_D spectrum_2;
FFT_SPLIT_COMPLEX_D spectrum_3;
void *measurement_rec;
void *rec_mem;
double *excitation_sig;
double *out_buf;
double *out_mem;
float *filter_in;
t_symbol *filter = filter_retriever(x->deconvolve_filter_specifier);
double filter_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double range_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double test_pow;
double max_pow;
double sample_rate = x->sample_rate;
double deconvolve_phase = phase_retriever(x->deconvolve_phase);
long deconvolve_mode = x->deconvolve_mode;
long bandlimit = x->measure_mode == SWEEP ? x->bandlimit : 0;
AH_SIntPtr rec_length = x->T2;
AH_SIntPtr gen_length = 0;
AH_SIntPtr filter_length = buffer_length(filter);
AH_UIntPtr fft_size;
AH_UIntPtr fft_size_log2;
AH_UIntPtr mem_size;
AH_UIntPtr i;
t_ess sweep_params;
t_mls max_length_params;
t_noise_params noise_params;
switch (x->measure_mode)
{
case SWEEP:
ess_params(&sweep_params, x->sweep_params.rf1, x->sweep_params.rf2, x->sweep_params.fade_in, x->sweep_params.fade_out, x->sweep_params.RT, x->sweep_params.sample_rate, x->inv_amp ? x->sweep_params.amp : 1, x->amp_curve);
gen_length = ess_get_length(&sweep_params);
break;
case MLS:
mls_params(&max_length_params, x->max_length_params.order, x->inv_amp ? x->max_length_params.amp : 1);
gen_length = mls_get_length(&max_length_params);
break;
case NOISE:
coloured_noise_params(&noise_params, x->noise_params.mode, x->noise_params.fade_in, x->noise_params.fade_out, x->noise_params.RT, x->noise_params.sample_rate, x->inv_amp ? x->noise_params.amp : 1);
gen_length = coloured_noise_get_length(&noise_params);
break;
}
// Check and calculate lengths
fft_size = calculate_fft_size(rec_length + gen_length, &fft_size_log2);
// Allocate Temporary Memory
fft_setup = hisstools_create_setup_d(fft_size_log2);
excitation_sig = (double *) malloc(gen_length * sizeof(double));
spectrum_1.realp = ALIGNED_MALLOC((sizeof(double) * fft_size * 4));
spectrum_1.imagp = spectrum_1.realp + (fft_size >> 1);
spectrum_2.realp = spectrum_1.imagp + (fft_size >> 1);
spectrum_2.imagp = spectrum_2.realp + (fft_size >> 1);
spectrum_3.realp = spectrum_2.imagp + (fft_size >> 1);
spectrum_3.imagp = spectrum_3.realp + fft_size;
filter_in = filter_length ? (float *) ALIGNED_MALLOC(sizeof(float) * filter_length) : 0;
if (!fft_setup || !excitation_sig || !spectrum_1.realp || (filter_length && !filter_in))
{
object_error ((t_object *) x, "could not allocate temporary memory for processing");
hisstools_destroy_setup_d(fft_setup);
free(excitation_sig);
ALIGNED_FREE(spectrum_1.realp);
ALIGNED_FREE(filter_in);
return;
}
// Allocate output memory and get record memory
rec_mem = access_mem_swap(&x->rec_mem, &mem_size);
out_mem = grow_mem_swap(&x->out_mem, fft_size * x->current_num_active_ins * sizeof(double), fft_size * x->current_num_active_ins);
if (!out_mem)
{
object_error ((t_object *) x, "could not allocate memory for output storage");
free(excitation_sig);
hisstools_destroy_setup_d(fft_setup);
return;
}
// Generate Signal
switch (x->measure_mode)
{
case SWEEP:
ess_gen(&sweep_params, excitation_sig, true);
break;
case MLS:
mls_gen(&max_length_params, excitation_sig, true);
break;
case NOISE:
coloured_noise_gen(&noise_params, excitation_sig, true);
break;
}
// Transform excitation signal into complex spectrum 2
time_to_halfspectrum_double(fft_setup, excitation_sig, gen_length, spectrum_2, fft_size);
if (bandlimit)
{
// Calculate standard filter for bandlimited deconvolution (sweep * inv sweep)
ess_igen(&sweep_params, excitation_sig, INVERT_ALL, true);
time_to_halfspectrum_double(fft_setup, excitation_sig, gen_length, spectrum_3, fft_size);
convolve(spectrum_3, spectrum_2, fft_size, SPECTRUM_REAL);
// Calculate full power spectrum from half spectrum - convert filter to have the required phase
power_full_spectrum_from_half_spectrum(spectrum_3, fft_size);
variable_phase_from_power_spectrum(fft_setup, spectrum_3, fft_size, deconvolve_phase, true);
// Convert back to real format
spectrum_3.imagp[0] = spectrum_3.realp[fft_size >> 1];
}
else
{
// Find maximum power to scale
for (i = 1, max_pow = 0; i < (fft_size >> 1); i++)
void bufconvolve_process_internal (t_bufconvolve *x, t_symbol *sym, short argc, t_atom *argv)
{
FFT_SETUP_D fft_setup;
FFT_SPLIT_COMPLEX_D spectrum_1;
FFT_SPLIT_COMPLEX_D spectrum_2;
FFT_SPLIT_COMPLEX_D spectrum_3;
double *out_buf;
float *in_temp;
float *filter_in;
AH_Boolean convolve_mode = sym == gensym("convolve") ? true : false;
t_symbol *target = atom_getsym(argv++);
t_symbol *source_1 = atom_getsym(argv++);
t_symbol *source_2 = atom_getsym(argv++);
t_symbol *filter = filter_retriever(x->deconvolve_filter_specifier);
double filter_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double range_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double time_mul = atom_getfloat(argv++);
double sample_rate = buffer_sample_rate(source_1);
double deconvolve_phase = phase_retriever(x->deconvolve_phase);
double deconvolve_delay;
AH_SIntPtr source_length_1 = buffer_length(source_1);
AH_SIntPtr source_length_2 = buffer_length(source_2);
AH_SIntPtr filter_length = buffer_length(filter);
AH_UIntPtr fft_size;
AH_UIntPtr fft_size_log2;
long deconvolve_mode = x->deconvolve_mode;
t_buffer_write_error error;
// Check input buffers
if (buffer_check((t_object *) x, source_1) || buffer_check((t_object *) x, source_2))
return;
// Check sample rates
if (sample_rate != buffer_sample_rate(source_2))
object_warn((t_object *) x, "sample rates do not match");
// Check and calculate lengths
if (convolve_mode == true)
fft_size = (AH_UIntPtr) ((source_length_1 + source_length_2) * time_mul);
else
fft_size = (AH_UIntPtr) (source_length_1 < source_length_2 ? source_length_2 * time_mul : source_length_1 * time_mul);
fft_size = calculate_fft_size(fft_size, &fft_size_log2);
deconvolve_delay = delay_retriever(x->deconvolve_delay, fft_size, sample_rate);
if (fft_size < 8)
{
object_error((t_object *) x, "input buffers are too short, or have no length");
return;
}
// Allocate Memory (use pointer aliasing where possible for efficiency)
fft_setup = hisstools_create_setup_d(fft_size_log2);
spectrum_1.realp = ALIGNED_MALLOC(sizeof(double) * fft_size * (convolve_mode == true ? 3 : 4));
spectrum_1.imagp = spectrum_1.realp + (fft_size >> 1);
spectrum_2.realp = spectrum_1.imagp + (fft_size >> 1);
spectrum_2.imagp = spectrum_2.realp + (fft_size >> 1);
spectrum_3.realp = spectrum_2.imagp + (fft_size >> 1);
spectrum_3.imagp = convolve_mode == true ? 0 : spectrum_3.realp + fft_size;
filter_in = filter_length ? ALIGNED_MALLOC(sizeof(float *) * filter_length) : 0;
out_buf = spectrum_2.realp;
in_temp = (float *) spectrum_3.realp;
// Check memory allocations
if (!fft_setup || !spectrum_1.realp || (filter_length && !filter_in))
{
object_error((t_object *) x, "could not allocate temporary memory for processing");
hisstools_destroy_setup_d(fft_setup);
ALIGNED_FREE(spectrum_1.realp);
ALIGNED_FREE(filter_in);
return;
}
// Get inputs - convert to frequency domain
buffer_read(source_1, x->read_chan - 1, in_temp, source_length_1);
time_to_halfspectrum_float(fft_setup, in_temp, source_length_1, spectrum_1, fft_size);
buffer_read(source_2, x->read_chan - 1, in_temp, source_length_2);
time_to_halfspectrum_float(fft_setup, in_temp, source_length_2, spectrum_2, fft_size);
// Do deconvolution or convolution
if (convolve_mode == true)
convolve(spectrum_1, spectrum_2, fft_size, SPECTRUM_REAL);
else
{
// Fill deconvolution filter specifiers - load filter from buffer (if specified) - deconvolve
fill_power_array_specifier(filter_specifier, x->deconvolve_filter_specifier, x->deconvolve_num_filter_specifiers);
fill_power_array_specifier(range_specifier, x->deconvolve_range_specifier, x->deconvolve_num_range_specifiers);
buffer_read(filter, 0, filter_in, fft_size);
deconvolve(fft_setup, spectrum_1, spectrum_2, spectrum_3, filter_specifier, range_specifier, 0.0, filter_in, filter_length, fft_size, SPECTRUM_REAL, deconvolve_mode, deconvolve_phase, deconvolve_delay, sample_rate);
}
// Convert to time domain - copy out to buffer
spectrum_to_time(fft_setup, out_buf, spectrum_1, fft_size, SPECTRUM_REAL);
error = buffer_write(target, out_buf, (convolve_mode == true ? source_length_1 + source_length_2 - 1 : fft_size), x->write_chan - 1, x->resize, sample_rate, 1.);
buffer_write_error((t_object *) x, target, error);
// Free resources
hisstools_destroy_setup_d(fft_setup);
ALIGNED_FREE(spectrum_1.realp);
ALIGNED_FREE(filter_in);
if (!error)
outlet_bang(x->process_done);
}
void irreference_process (t_irreference *x, t_symbol *sym, short argc, t_atom *argv)
{
FFT_SETUP_D fft_setup;
FFT_SPLIT_COMPLEX_D spectrum_1;
FFT_SPLIT_COMPLEX_D spectrum_2;
FFT_SPLIT_COMPLEX_D spectrum_3;
FFT_SPLIT_COMPLEX_D spectrum_4;
void *rec_mem1;
void *rec_mem2;
double *out_mem;
double *out_buf;
float *filter_in;
t_symbol *filter = filter_retriever(x->deconvolve_filter_specifier);
double filter_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double range_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double sample_rate = x->sample_rate;
double deconvolve_phase = phase_retriever(x->deconvolve_phase);
double deconvolve_delay;
long deconvolve_mode = deconvolve_mode = x->deconvolve_mode;
long smoothing_on = x->num_smooth;
AH_SIntPtr alloc_rec_length = x->T;
AH_SIntPtr rec_length = x->current_length;
AH_SIntPtr filter_length = buffer_length(filter);
AH_UIntPtr fft_size;
AH_UIntPtr fft_size_log2;
AH_UIntPtr mem_size;
AH_UIntPtr i;
// Sanity check
if (!rec_length)
return;
// Check and calculate lengths
fft_size = calculate_fft_size(rec_length * 2, &fft_size_log2);
deconvolve_delay = delay_retriever(x->deconvolve_delay, fft_size, sample_rate);
// Allocate Temporary Memory
fft_setup = hisstools_create_setup_d(fft_size_log2);
spectrum_1.realp = ALIGNED_MALLOC((sizeof(double) * fft_size * 4));
spectrum_1.imagp = spectrum_1.realp + (fft_size >> 1);
spectrum_2.realp = spectrum_1.imagp + (fft_size >> 1);
spectrum_2.imagp = spectrum_2.realp + (fft_size >> 1);
spectrum_3.realp = spectrum_2.imagp + (fft_size >> 1);
spectrum_3.imagp = spectrum_3.realp + fft_size;
filter_in = filter_length ? ALIGNED_MALLOC(sizeof(float *) * filter_length) : 0;
if (smoothing_on)
{
spectrum_4.realp = malloc(sizeof(double) * 2 * fft_size);
spectrum_4.imagp = spectrum_4.realp + fft_size;
}
else
spectrum_4.realp = 0;
if (!fft_setup || !spectrum_1.realp || (smoothing_on && !spectrum_4.realp) || (filter_length && !filter_in))
{
object_error ((t_object *) x, "could not allocate temporary memory for processing");
hisstools_destroy_setup_d(fft_setup);
ALIGNED_FREE(spectrum_1.realp);
ALIGNED_FREE(filter_in);
free(spectrum_4.realp);
return;
}
x->fft_size = fft_size;
// Allocate output memory and get record memory
rec_mem1 = access_mem_swap(&x->rec_mem, &mem_size);
out_mem = grow_mem_swap(&x->out_mem, fft_size * x->current_num_active_ins * sizeof(double), fft_size);
if (!out_mem)
{
object_error ((t_object *) x, "could not allocate memory for output storage");
free(spectrum_1.realp);
hisstools_destroy_setup_d(fft_setup);
return;
}
// Transform reference into spectrum 2 - [smooth]
time_to_halfspectrum_double(fft_setup, rec_mem1, rec_length, spectrum_2, fft_size);
if (smoothing_on)
irreference_smooth(fft_setup, spectrum_2, spectrum_4, x->smooth_mode, fft_size, x->num_smooth > 1 ? x->smooth[0] : 0., x->num_smooth > 1 ? x->smooth[1] : x->smooth[0]);
// Fill deconvolution filter specifiers - read filter from buffer (if specified) - make deconvolution filter - delay filter
fill_power_array_specifier(filter_specifier, x->deconvolve_filter_specifier, x->deconvolve_num_filter_specifiers);
fill_power_array_specifier(range_specifier, x->deconvolve_range_specifier, x->deconvolve_num_range_specifiers);
buffer_read(filter, 0, filter_in, fft_size);
make_deconvolution_filter(fft_setup, spectrum_2, spectrum_3, filter_specifier, range_specifier, 0, filter_in, filter_length, fft_size, SPECTRUM_REAL, deconvolve_mode, deconvolve_phase, sample_rate);
delay_spectrum(spectrum_3, fft_size, SPECTRUM_REAL, deconvolve_delay);
// Deconvolve each input
for (i = 0; i < (AH_UIntPtr) x->current_num_active_ins; i++)
{
// Get current input and output buffers
rec_mem2 = (double *) rec_mem1 + ((i + 1) * alloc_rec_length);
out_buf = out_mem + (i * fft_size);
// Do transform into spectrum_1 - [smooth] - deconvolve - [delay] - transform back
time_to_halfspectrum_double(fft_setup, rec_mem2, rec_length, spectrum_1, fft_size);
if (smoothing_on)
irreference_smooth(fft_setup, spectrum_1, spectrum_4, x->smooth_mode, fft_size, x->num_smooth > 1 ? x->smooth[0] : 0., x->num_smooth > 1 ? x->smooth[1] : x->smooth[0]);
deconvolve_with_filter(spectrum_1, spectrum_2, spectrum_3, fft_size, SPECTRUM_REAL);
spectrum_to_time(fft_setup, out_buf, spectrum_1, fft_size, SPECTRUM_REAL);
}
// Free Memory
hisstools_destroy_setup_d(fft_setup);
ALIGNED_FREE(spectrum_1.realp);
ALIGNED_FREE(filter_in);
free(spectrum_4.realp);
// Done
outlet_bang(x->process_done);
}
void irphase_process_internal (t_irphase *x, t_symbol *sym, short argc, t_atom *argv)
{
FFT_SETUP_D fft_setup;
FFT_SPLIT_COMPLEX_D spectrum_1;
FFT_SPLIT_COMPLEX_D spectrum_2;
FFT_SPLIT_COMPLEX_D spectrum_3;
float *in;
float *filter_in;
double *out_buf;
t_symbol *filter = filter_retriever(x->deconvolve_filter_specifier);
t_symbol *target = atom_getsym(argv++);
t_symbol *source = atom_getsym(argv++);
double filter_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double range_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double phase = atom_getfloat(argv++);
double time_mul = atom_getfloat(argv++);
double sample_rate = buffer_sample_rate(source);
double deconvolve_delay;
double deconvolve_phase;
t_phase_type mode = (t_phase_type) atom_getlong(argv++);
AH_UIntPtr fft_size;
AH_UIntPtr fft_size_log2;
AH_UIntPtr i;
t_buffer_write_error error;
long deconvolve_mode;
// Get input buffer lengths
AH_SIntPtr source_length_1 = buffer_length(source);
AH_SIntPtr filter_length = buffer_length(filter);
AH_SIntPtr max_length = source_length_1;
// Check input buffers
if (buffer_check((t_object *) x, source))
return;
// Calculate fft size
time_mul = time_mul == 0. ? 1 : time_mul;
if (time_mul < 1)
{
object_warn((t_object *) x, " time multiplier cannot be less than 1 (using 1)");
time_mul = 1;
}
fft_size = calculate_fft_size((long) (max_length * time_mul), &fft_size_log2);
if (fft_size < 8)
{
object_error((t_object *) x, "buffers are too short, or have no length");
return;
}
deconvolve_mode = x->deconvolve_mode;
deconvolve_phase = phase_retriever(x->deconvolve_phase);
deconvolve_delay = delay_retriever(x->deconvolve_delay, fft_size, sample_rate);
// Allocate momory
fft_setup = hisstools_create_setup_d(fft_size_log2);
spectrum_1.realp = ALIGNED_MALLOC(sizeof(double) * fft_size * (mode == MODE_ALLPASS ? 6 : 3));
spectrum_1.imagp = spectrum_1.realp + fft_size;
spectrum_2.realp = spectrum_1.imagp + fft_size;
spectrum_2.imagp = mode == MODE_ALLPASS ? spectrum_2.realp + fft_size : 0;
spectrum_3.realp = mode == MODE_ALLPASS ? spectrum_2.imagp + fft_size : 0;
spectrum_3.imagp = mode == MODE_ALLPASS ? spectrum_3.realp + fft_size : 0;
filter_in = filter_length ? ALIGNED_MALLOC(sizeof(float *) * filter_length) : 0;
out_buf = mode == MODE_ALLPASS ? spectrum_3.realp : spectrum_2.realp;
in = (float *) out_buf;
if (!spectrum_1.realp || !fft_setup || (filter_length && !filter_in))
{
object_error((t_object *) x, "could not allocate temporary memory for processing");
hisstools_destroy_setup_d(fft_setup);
ALIGNED_FREE(spectrum_1.realp);
ALIGNED_FREE(filter_in);
return;
}
// Get input - convert to frequency domain - get power spectrum - convert phase
buffer_read(source, x->read_chan - 1, in, fft_size);
time_to_spectrum_float(fft_setup, in, source_length_1, spectrum_1, fft_size);
power_spectrum(spectrum_1, fft_size, SPECTRUM_FULL);
variable_phase_from_power_spectrum(fft_setup, spectrum_1, fft_size, phase, false);
if (mode == MODE_ALLPASS)
{
// Copy minimum phase spectrum to spectrum_2
for (i = 0; i < fft_size; i++)
{
spectrum_2.realp[i] = spectrum_1.realp[i];
spectrum_2.imagp[i] = spectrum_1.imagp[i];
}
// Get input again
time_to_spectrum_float(fft_setup, in, source_length_1, spectrum_1, fft_size);
// Fill deconvolution filter specifiers - read filter from buffer (if specified) - deconvolve input by minimum phase spectrum
fill_power_array_specifier(filter_specifier, x->deconvolve_filter_specifier, x->deconvolve_num_filter_specifiers);
fill_power_array_specifier(range_specifier, x->deconvolve_range_specifier, x->deconvolve_num_range_specifiers);
buffer_read(filter, 0, filter_in, fft_size);
deconvolve(fft_setup, spectrum_1, spectrum_2, spectrum_3, filter_specifier, range_specifier, 0, filter_in, filter_length, fft_size, SPECTRUM_FULL, deconvolve_mode, deconvolve_phase, deconvolve_delay, sample_rate);
}
// Convert to time domain - copy out to buffer
spectrum_to_time(fft_setup, out_buf, spectrum_1, fft_size, SPECTRUM_FULL);
error = buffer_write(target, out_buf, fft_size, x->write_chan - 1, x->resize, sample_rate, 1);
buffer_write_error((t_object *) x, target, error);
// Free memory
hisstools_destroy_setup_d(fft_setup);
ALIGNED_FREE(spectrum_1.realp);
ALIGNED_FREE(filter_in);
if (!error)
outlet_bang(x->process_done);
}
void irextract_process (t_irextract *x, t_symbol *rec_buffer, t_atom_long num_channels, double sample_rate)
{
FFT_SETUP_D fft_setup;
FFT_SPLIT_COMPLEX_D spectrum_1;
FFT_SPLIT_COMPLEX_D spectrum_2;
FFT_SPLIT_COMPLEX_D spectrum_3;
void *excitation_sig;
double *out_mem;
float *rec_mem;
float *filter_in;
t_symbol *filter = filter_retriever(x->deconvolve_filter_specifier);
double filter_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double range_specifier[HIRT_MAX_SPECIFIER_ITEMS];
double test_pow;
double max_pow;
double deconvolve_phase = phase_retriever(x->deconvolve_phase);
long deconvolve_mode = x->deconvolve_mode;
long bandlimit = x->measure_mode == SWEEP ? x->bandlimit : 0;
AH_SIntPtr rec_length = buffer_length(rec_buffer);
AH_SIntPtr gen_length = 0;
AH_SIntPtr filter_length = buffer_length(filter);
AH_SIntPtr out_length_samps;
AH_UIntPtr fft_size;
AH_UIntPtr fft_size_log2;
AH_UIntPtr i;
if (buffer_check((t_object *)x, rec_buffer) || !rec_length)
return;
switch (x->measure_mode)
{
case SWEEP:
gen_length = ess_get_length(&x->sweep_params);
break;
case MLS:
gen_length = mls_get_length(&x->max_length_params);
break;
case NOISE:
gen_length = coloured_noise_get_length(&x->noise_params);
break;
}
// Check and calculate lengths
fft_size = calculate_fft_size(rec_length + gen_length, &fft_size_log2);
if (rec_length % num_channels)
object_warn ((t_object *) x, "buffer length is not a multiple of the number of channels - number may be wrong");
if (((rec_length / num_channels) - gen_length) < 1)
{
object_error ((t_object *) x, "buffer is not long enough for generated signal");
return;
}
out_length_samps = ((rec_length / num_channels) - gen_length);
if (x->out_length)
{
if (out_length_samps < (x->out_length * sample_rate))
object_warn ((t_object *) x, "buffer is not long enough for requested output length");
else
out_length_samps = (AH_SIntPtr) (x->out_length * sample_rate);
}
// Allocate Temporary Memory
fft_setup = hisstools_create_setup_d(fft_size_log2);
excitation_sig = malloc(((gen_length > filter_length) ? gen_length : filter_length) * sizeof(double));
spectrum_1.realp = ALIGNED_MALLOC((sizeof(double) * fft_size * 4));
spectrum_1.imagp = spectrum_1.realp + (fft_size >> 1);
spectrum_2.realp = spectrum_1.imagp + (fft_size >> 1);
spectrum_2.imagp = spectrum_2.realp + (fft_size >> 1);
spectrum_3.realp = spectrum_2.imagp + (fft_size >> 1);
spectrum_3.imagp = spectrum_3.realp + fft_size;
rec_mem = (float *) malloc(rec_length * sizeof(float));
filter_in = filter_length ? ALIGNED_MALLOC(sizeof(float *) * filter_length) : 0;
if (!fft_setup || !excitation_sig || !spectrum_1.realp || (filter_length && !filter_in))
{
object_error ((t_object *) x, "could not allocate temporary memory for processing");
hisstools_destroy_setup_d(fft_setup);
free(excitation_sig);
ALIGNED_FREE(spectrum_1.realp);
ALIGNED_FREE(filter_in);
return;
}
x->fft_size = fft_size;
x->sample_rate = sample_rate;
x->out_length_samps = out_length_samps;
x->gen_length = gen_length;
// Allocate output memory and get record memory
out_mem = grow_mem_swap(&x->out_mem, fft_size * sizeof(double), fft_size);
if (!out_mem)
{
object_error ((t_object *) x, "could not allocate memory for output storage");
free(excitation_sig);
hisstools_destroy_setup_d(fft_setup);
return;
}
// Generate Signal
switch (x->measure_mode)
{
case SWEEP:
ess_gen(&x->sweep_params, excitation_sig, true);
break;
case MLS:
mls_gen(&x->max_length_params, excitation_sig, true);
break;
case NOISE:
coloured_noise_gen(&x->noise_params, excitation_sig, true);
break;
}
// Transform excitation signal into complex spectrum 2
time_to_halfspectrum_double(fft_setup, excitation_sig, gen_length, spectrum_2, fft_size);
if (bandlimit)
{
// Calculate standard filter for bandlimited deconvolution (sweep * inv sweep)
ess_igen(&x->sweep_params, excitation_sig, true, true);
time_to_halfspectrum_double(fft_setup, excitation_sig, gen_length, spectrum_3, fft_size);
convolve(spectrum_3, spectrum_2, fft_size, SPECTRUM_REAL);
// Calculate full power spectrum from half spectrum - convert filter to have the required phase
power_full_spectrum_from_half_spectrum(spectrum_3, fft_size);
variable_phase_from_power_spectrum(fft_setup, spectrum_3, fft_size, deconvolve_phase, true);
// Convert back to real format
spectrum_3.imagp[0] = spectrum_3.realp[fft_size >> 1];
}
else
{
// Find maximum power to scale
for (i = 1, max_pow = 0; i < (fft_size >> 1); i++)