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legacyresample: remove unused file
This commit is contained in:
Benjamin Otte
parent
1ca0e14de1
commit
27b3e53d5d
2 changed files with 0 additions and 210 deletions
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@ -5,7 +5,6 @@ resample_SOURCES = \
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resample.c \
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resample.c \
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resample_functable.c \
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resample_functable.c \
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resample_ref.c \
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resample_ref.c \
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resample_chunk.c \
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resample.h \
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resample.h \
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buffer.c
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buffer.c
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@ -1,209 +0,0 @@
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/* Resampling library
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* Copyright (C) <2001> David A. Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <string.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <liboil/liboil.h>
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#include "resample.h"
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#include "buffer.h"
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#include "debug.h"
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static double
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resample_sinc_window (double x, double halfwidth, double scale)
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{
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double y;
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if (x == 0)
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return 1.0;
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if (x < -halfwidth || x > halfwidth)
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return 0.0;
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y = sin (x * M_PI * scale) / (x * M_PI * scale) * scale;
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x /= halfwidth;
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y *= (1 - x * x) * (1 - x * x);
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return y;
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}
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void
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resample_scale_chunk (ResampleState * r)
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{
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if (r->need_reinit) {
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RESAMPLE_DEBUG ("sample size %d", r->sample_size);
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if (r->buffer)
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free (r->buffer);
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r->buffer_len = r->sample_size * 1000;
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r->buffer = malloc (r->buffer_len);
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memset (r->buffer, 0, r->buffer_len);
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r->i_inc = r->o_rate / r->i_rate;
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r->o_inc = r->i_rate / r->o_rate;
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RESAMPLE_DEBUG ("i_inc %g o_inc %g", r->i_inc, r->o_inc);
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r->i_start = -r->i_inc * r->filter_length;
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r->need_reinit = 0;
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#if 0
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if (r->i_inc < 1.0) {
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r->sinc_scale = r->i_inc;
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if (r->sinc_scale == 0.5) {
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/* strange things happen at integer multiples */
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r->sinc_scale = 1.0;
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}
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} else {
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r->sinc_scale = 1.0;
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}
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#else
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r->sinc_scale = 1.0;
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#endif
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}
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while (r->o_size > 0) {
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double midpoint;
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int i;
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int j;
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RESAMPLE_DEBUG ("i_start %g", r->i_start);
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midpoint = r->i_start + (r->filter_length - 1) * 0.5 * r->i_inc;
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if (midpoint > 0.5 * r->i_inc) {
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RESAMPLE_ERROR ("inconsistent state");
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}
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while (midpoint < -0.5 * r->i_inc) {
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AudioresampleBuffer *buffer;
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buffer = audioresample_buffer_queue_pull (r->queue, r->sample_size);
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if (buffer == NULL) {
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RESAMPLE_ERROR ("buffer_queue_pull returned NULL");
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return;
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}
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r->i_start += r->i_inc;
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RESAMPLE_DEBUG ("pulling (i_start = %g)", r->i_start);
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midpoint += r->i_inc;
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memmove (r->buffer, r->buffer + r->sample_size,
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r->buffer_len - r->sample_size);
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memcpy (r->buffer + r->buffer_len - r->sample_size, buffer->data,
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r->sample_size);
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audioresample_buffer_unref (buffer);
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}
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switch (r->format) {
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case RESAMPLE_FORMAT_S16:
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for (i = 0; i < r->n_channels; i++) {
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double acc = 0;
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double offset;
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double x;
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for (j = 0; j < r->filter_length; j++) {
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offset = (r->i_start + j * r->i_inc) * r->o_inc;
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x = *(int16_t *) (r->buffer + i * sizeof (int16_t) +
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j * r->sample_size);
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acc +=
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resample_sinc_window (offset, r->filter_length * 0.5,
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r->sinc_scale) * x;
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}
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if (acc < -32768.0)
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acc = -32768.0;
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if (acc > 32767.0)
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acc = 32767.0;
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*(int16_t *) (r->o_buf + i * sizeof (int16_t)) = rint (acc);
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}
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break;
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case RESAMPLE_FORMAT_S32:
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for (i = 0; i < r->n_channels; i++) {
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double acc = 0;
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double offset;
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double x;
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for (j = 0; j < r->filter_length; j++) {
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offset = (r->i_start + j * r->i_inc) * r->o_inc;
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x = *(int32_t *) (r->buffer + i * sizeof (int32_t) +
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j * r->sample_size);
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acc +=
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resample_sinc_window (offset, r->filter_length * 0.5,
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r->sinc_scale) * x;
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}
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if (acc < -2147483648.0)
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acc = -2147483648.0;
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if (acc > 2147483647.0)
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acc = 2147483647.0;
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*(int32_t *) (r->o_buf + i * sizeof (int32_t)) = rint (acc);
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}
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break;
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case RESAMPLE_FORMAT_F32:
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for (i = 0; i < r->n_channels; i++) {
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double acc = 0;
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double offset;
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double x;
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for (j = 0; j < r->filter_length; j++) {
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offset = (r->i_start + j * r->i_inc) * r->o_inc;
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x = *(float *) (r->buffer + i * sizeof (float) +
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j * r->sample_size);
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acc +=
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resample_sinc_window (offset, r->filter_length * 0.5,
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r->sinc_scale) * x;
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}
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*(float *) (r->o_buf + i * sizeof (float)) = acc;
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}
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break;
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case RESAMPLE_FORMAT_F64:
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for (i = 0; i < r->n_channels; i++) {
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double acc = 0;
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double offset;
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double x;
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for (j = 0; j < r->filter_length; j++) {
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offset = (r->i_start + j * r->i_inc) * r->o_inc;
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x = *(double *) (r->buffer + i * sizeof (double) +
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j * r->sample_size);
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acc +=
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resample_sinc_window (offset, r->filter_length * 0.5,
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r->sinc_scale) * x;
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}
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*(double *) (r->o_buf + i * sizeof (double)) = acc;
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}
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break;
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}
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r->i_start -= 1.0;
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r->o_buf += r->sample_size;
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r->o_size -= r->sample_size;
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}
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}
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