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/* BSE - Better Sound Engine -*-mode: c;-*-
* Copyright (C) 2002 Tim Janik
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* A copy of the GNU Lesser General Public License should ship along
* with this library; if not, see http://www.gnu.org/copyleft/.
*/
#include <bse/bseplugin.h>
#include <bse/bseprocedure.h>
#include <bse/bseeditablesample.h>
#include <bse/gsldatahandle.h>
AUTHORS = "Tim Janik <timj@gtk.org>";
LICENSE = "GNU Lesser General Public License";
METHOD (BseEditableSample, open) {
HELP = ("Open the sample for reading.");
IN = bse_param_spec_object ("esample", "Editable Sample", NULL,
BSE_TYPE_EDITABLE_SAMPLE, SFI_PARAM_STANDARD);
OUT = bse_param_spec_genum ("error", "Error", NULL,
BSE_TYPE_ERROR_TYPE, BSE_ERROR_NONE,
SFI_PARAM_STANDARD);
} BODY (BseProcedureClass *proc,
const GValue *in_values,
GValue *out_values)
{
/* extract parameter values */
BseEditableSample *esample = bse_value_get_object (in_values++);
BseErrorType error;
/* check parameters */
if (!BSE_IS_EDITABLE_SAMPLE (esample))
return BSE_ERROR_PROC_PARAM_INVAL;
/* action */
if (!esample->wchunk)
error = BSE_ERROR_WAVE_NOT_FOUND;
else if (esample->open_count)
{
esample->open_count++;
error = BSE_ERROR_NONE;
}
else
{
error = gsl_wave_chunk_open (esample->wchunk);
if (!error)
esample->open_count++;
}
/* set output parameters */
g_value_set_enum (out_values++, error);
return BSE_ERROR_NONE;
}
METHOD (BseEditableSample, close) {
HELP = ("Close an opened sample.");
IN = bse_param_spec_object ("esample", "Editable Sample", NULL,
BSE_TYPE_EDITABLE_SAMPLE, SFI_PARAM_STANDARD);
} BODY (BseProcedureClass *proc,
const GValue *in_values,
GValue *out_values)
{
/* extract parameter values */
BseEditableSample *esample = bse_value_get_object (in_values++);
/* check parameters */
if (!BSE_IS_EDITABLE_SAMPLE (esample) || !esample->wchunk || !esample->open_count)
return BSE_ERROR_PROC_PARAM_INVAL;
/* action */
esample->open_count--;
if (!esample->open_count)
gsl_wave_chunk_close (esample->wchunk);
return BSE_ERROR_NONE;
}
METHOD (BseEditableSample, get-length) {
HELP = ("Return the number of values in the sample.");
IN = bse_param_spec_object ("esample", "Editable Sample", NULL,
BSE_TYPE_EDITABLE_SAMPLE, SFI_PARAM_STANDARD);
OUT = sfi_pspec_int ("length", NULL, "Number of values",
1, 0, G_MAXINT, 1, SFI_PARAM_STANDARD);
} BODY (BseProcedureClass *proc,
const GValue *in_values,
GValue *out_values)
{
/* extract parameter values */
BseEditableSample *esample = bse_value_get_object (in_values++);
GslDataCache *dcache = NULL;
/* check parameters */
if (!BSE_IS_EDITABLE_SAMPLE (esample))
return BSE_ERROR_PROC_PARAM_INVAL;
/* set output parameters */
if (BSE_EDITABLE_SAMPLE_OPENED (esample) && esample->wchunk)
dcache = esample->wchunk->dcache;
sfi_value_set_int (out_values++, dcache ? gsl_data_handle_length (dcache->dhandle) : 0);
return BSE_ERROR_NONE;
}
METHOD (BseEditableSample, get-n-channels) {
HELP = ("Return the number of channels in the sample.");
IN = bse_param_spec_object ("esample", "Editable Sample", NULL,
BSE_TYPE_EDITABLE_SAMPLE, SFI_PARAM_STANDARD);
OUT = sfi_pspec_int ("n-channels", NULL, "Number of channels",
0, 0, G_MAXINT, 1, SFI_PARAM_STANDARD);
} BODY (BseProcedureClass *proc,
const GValue *in_values,
GValue *out_values)
{
/* extract parameter values */
BseEditableSample *esample = bse_value_get_object (in_values++);
/* check parameters */
if (!BSE_IS_EDITABLE_SAMPLE (esample))
return BSE_ERROR_PROC_PARAM_INVAL;
/* set output parameters */
sfi_value_set_int (out_values++, esample->wchunk ? esample->wchunk->n_channels : 1);
return BSE_ERROR_NONE;
}
METHOD (BseEditableSample, get-osc-freq) {
HELP = ("Return the oscillator frequency for the sample.");
IN = bse_param_spec_object ("esample", "Editable Sample", NULL,
BSE_TYPE_EDITABLE_SAMPLE, SFI_PARAM_STANDARD);
OUT = bse_param_spec_freq_simple ("osc-freq", NULL, "Oscillator Frequency",
SFI_PARAM_STANDARD);
} BODY (BseProcedureClass *proc,
const GValue *in_values,
GValue *out_values)
{
/* extract parameter values */
BseEditableSample *esample = bse_value_get_object (in_values++);
/* check parameters */
if (!BSE_IS_EDITABLE_SAMPLE (esample))
return BSE_ERROR_PROC_PARAM_INVAL;
/* set output parameters */
sfi_value_set_real (out_values++, esample->wchunk ? esample->wchunk->osc_freq : BSE_KAMMER_FREQUENCY);
return BSE_ERROR_NONE;
}
METHOD (BseEditableSample, read-samples) {
HELP = ("Read a set of samples from a specific offset.");
IN = bse_param_spec_object ("esample", "Editable Sample", NULL,
BSE_TYPE_EDITABLE_SAMPLE, SFI_PARAM_STANDARD);
IN = sfi_pspec_int ("voffset", NULL, "Value offset",
0, 0, G_MAXINT, 1, SFI_PARAM_STANDARD);
OUT = sfi_pspec_fblock ("sample_block", NULL, "Block of samples", SFI_PARAM_STANDARD);
} BODY (BseProcedureClass *proc,
const GValue *in_values,
GValue *out_values)
{
/* extract parameter values */
BseEditableSample *esample = bse_value_get_object (in_values++);
guint voffset = sfi_value_get_int (in_values++);
GslDataCache *dcache = NULL;
SfiFBlock *fblock;
/* check parameters */
if (!BSE_IS_EDITABLE_SAMPLE (esample))
return BSE_ERROR_PROC_PARAM_INVAL;
if (BSE_EDITABLE_SAMPLE_OPENED (esample) && esample->wchunk)
dcache = esample->wchunk->dcache;
if (!dcache || voffset >= gsl_data_handle_length (dcache->dhandle))
fblock = sfi_fblock_new_sized (1024);
else
{
GslDataCacheNode *dnode = gsl_data_cache_ref_node (dcache, voffset, TRUE);
guint i, l, dnode_length = dcache->node_size;
l = dnode_length - (voffset - dnode->offset) + dcache->padding;
l = MIN (l, gsl_data_handle_length (dcache->dhandle) - voffset);
fblock = sfi_fblock_new_sized (l);
for (i = 0; i < l; i++)
fblock->values[i] = dnode->data[voffset - dnode->offset + i];
gsl_data_cache_unref_node (dcache, dnode);
}
/* set output parameters */
sfi_value_take_fblock (out_values++, fblock);
return BSE_ERROR_NONE;
}
METHOD (BseEditableSample, collect-stats) {
HELP = ("Collect statistics from sample blocks as (minimum, maximum) pairs.");
IN = bse_param_spec_object ("esample", "Editable Sample", NULL,
BSE_TYPE_EDITABLE_SAMPLE, SFI_PARAM_STANDARD);
IN = sfi_pspec_int ("voffset", NULL, "Offset of first stat block",
0, 0, G_MAXINT, 1, SFI_PARAM_STANDARD);
IN = sfi_pspec_real ("offset_scale", NULL, "Factor to scale voffset increments with",
0, 0, G_MAXINT, 1, SFI_PARAM_STANDARD);
IN = sfi_pspec_int ("block_size", NULL, "Block size to compute stat pairs from",
0, 0, G_MAXINT, 1, SFI_PARAM_STANDARD);
IN = sfi_pspec_int ("stepping", NULL, "Stepping within a stat block",
0, 0, G_MAXINT, 1, SFI_PARAM_STANDARD);
IN = sfi_pspec_int ("max_pairs", NULL, "Maximum number of (min, max) pairs to collect",
1, 0, G_MAXINT, 1, SFI_PARAM_STANDARD);
OUT = sfi_pspec_fblock ("sample_block", NULL, "Block of samples", SFI_PARAM_STANDARD);
} BODY (BseProcedureClass *proc,
const GValue *in_values,
GValue *out_values)
{
/* extract parameter values */
BseEditableSample *esample = bse_value_get_object (in_values++);
guint voffset = sfi_value_get_int (in_values++);
double offs_scale = g_value_get_double (in_values++);
guint block_size = sfi_value_get_int (in_values++);
guint stepping = sfi_value_get_int (in_values++);
guint max_pairs = sfi_value_get_int (in_values++);
GslDataCache *dcache = NULL;
SfiFBlock *fblock;
/* check parameters */
if (!BSE_IS_EDITABLE_SAMPLE (esample) || stepping < 1)
return BSE_ERROR_PROC_PARAM_INVAL;
if (BSE_EDITABLE_SAMPLE_OPENED (esample) && esample->wchunk)
dcache = esample->wchunk->dcache;
if (!dcache || voffset + block_size > gsl_data_handle_length (dcache->dhandle))
fblock = sfi_fblock_new_sized (max_pairs * 2);
else
{
GslDataCacheNode *dnode = gsl_data_cache_ref_node (dcache, voffset, GSL_DATA_CACHE_DEMAND_LOAD);
guint j, dnode_length = dcache->node_size;
fblock = sfi_fblock_new_sized (max_pairs * 2);
for (j = 0; j < max_pairs; j++)
{
guint i, cur_offset = j * offs_scale;
gfloat min = +1, max = -1;
/* keep alignment across offset scaling */
cur_offset /= stepping;
cur_offset = voffset + cur_offset * stepping;
/* collect stats for one block */
for (i = cur_offset; i < cur_offset + block_size; i += stepping)
{
guint pos;
if (i < dnode->offset || i >= dnode->offset + dnode_length)
{
gsl_data_cache_unref_node (dcache, dnode);
/* demand_load the first block only */
dnode = gsl_data_cache_ref_node (dcache, i, j == 0 ? GSL_DATA_CACHE_DEMAND_LOAD : GSL_DATA_CACHE_PEEK);
if (!dnode)
goto break_loops;
}
pos = i - dnode->offset;
min = MIN (min, dnode->data[pos]);
max = MAX (max, dnode->data[pos]);
}
fblock->values[j * 2] = min;
fblock->values[j * 2 + 1] = max;
}
gsl_data_cache_unref_node (dcache, dnode);
break_loops:
sfi_fblock_resize (fblock, j * 2);
}
/* set output parameters */
sfi_value_take_fblock (out_values++, fblock);
return BSE_ERROR_NONE;
}
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