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author | Sebastian Dröge <sebastian.droege@collabora.co.uk> | 2009-01-23 12:46:28 +0100 |
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committer | Sebastian Dröge <sebastian.droege@collabora.co.uk> | 2009-01-23 12:47:19 +0100 |
commit | e4e3b44e048ddc1d7499c6108175a5f89c6273d9 (patch) | |
tree | f88b685f1b6baf849649494ec557d2ef0ef13a88 /gst/audioresample/resample_ref.c | |
parent | 6fec8619b597f5cc9c58d268ddd9f64ea0a94277 (diff) | |
download | gst-plugins-bad-e4e3b44e048ddc1d7499c6108175a5f89c6273d9.tar.gz gst-plugins-bad-e4e3b44e048ddc1d7499c6108175a5f89c6273d9.tar.bz2 gst-plugins-bad-e4e3b44e048ddc1d7499c6108175a5f89c6273d9.zip |
Rename audioresample files and types to legacyresample
Finish the move/rename of audioresample to legacyresample
to prevent any confusion.
Diffstat (limited to 'gst/audioresample/resample_ref.c')
-rw-r--r-- | gst/audioresample/resample_ref.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/gst/audioresample/resample_ref.c b/gst/audioresample/resample_ref.c deleted file mode 100644 index bb8d2411..00000000 --- a/gst/audioresample/resample_ref.c +++ /dev/null @@ -1,223 +0,0 @@ -/* Resampling library - * Copyright (C) <2001> David A. Schleef <ds@schleef.org> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or 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 - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - - -#include <string.h> -#include <math.h> -#include <stdio.h> -#include <stdlib.h> -#include <limits.h> -#include <liboil/liboil.h> - -#include "resample.h" -#include "buffer.h" -#include "debug.h" - - -static double -resample_sinc_window (double x, double halfwidth, double scale) -{ - double y; - - if (x == 0) - return 1.0; - if (x < -halfwidth || x > halfwidth) - return 0.0; - - y = sin (x * M_PI * scale) / (x * M_PI * scale) * scale; - - x /= halfwidth; - y *= (1 - x * x) * (1 - x * x); - - return y; -} - -void -resample_scale_ref (ResampleState * r) -{ - if (r->need_reinit) { - RESAMPLE_DEBUG ("sample size %d", r->sample_size); - - if (r->buffer) - free (r->buffer); - r->buffer_len = r->sample_size * r->filter_length; - r->buffer = malloc (r->buffer_len); - memset (r->buffer, 0, r->buffer_len); - r->buffer_filled = 0; - - r->i_inc = r->o_rate / r->i_rate; - r->o_inc = r->i_rate / r->o_rate; - RESAMPLE_DEBUG ("i_inc %g o_inc %g", r->i_inc, r->o_inc); - - r->i_start = -r->i_inc * r->filter_length; - - r->need_reinit = 0; - -#if 0 - if (r->i_inc < 1.0) { - r->sinc_scale = r->i_inc; - if (r->sinc_scale == 0.5) { - /* strange things happen at integer multiples */ - r->sinc_scale = 1.0; - } - } else { - r->sinc_scale = 1.0; - } -#else - r->sinc_scale = 1.0; -#endif - } - - RESAMPLE_DEBUG ("asked to resample %d bytes", r->o_size); - RESAMPLE_DEBUG ("%d bytes in queue", - audioresample_buffer_queue_get_depth (r->queue)); - - while (r->o_size >= r->sample_size) { - double midpoint; - int i; - int j; - - midpoint = r->i_start + (r->filter_length - 1) * 0.5 * r->i_inc; - RESAMPLE_DEBUG - ("still need to output %d bytes, %d input left, i_start %g, midpoint %f", - r->o_size, audioresample_buffer_queue_get_depth (r->queue), r->i_start, - midpoint); - if (midpoint > 0.5 * r->i_inc) { - RESAMPLE_ERROR ("inconsistent state"); - } - while (midpoint < -0.5 * r->i_inc) { - AudioresampleBuffer *buffer; - - RESAMPLE_DEBUG ("midpoint %f < %f, r->i_inc %f", midpoint, - -0.5 * r->i_inc, r->i_inc); - buffer = audioresample_buffer_queue_pull (r->queue, r->sample_size); - if (buffer == NULL) { - /* FIXME: for the first buffer, this isn't necessarily an error, - * since because of the filter length we'll output less buffers. - * deal with that so we don't print to console */ - RESAMPLE_ERROR ("buffer_queue_pull returned NULL"); - return; - } - - r->i_start += r->i_inc; - RESAMPLE_DEBUG ("pulling (i_start = %g)", r->i_start); - - midpoint += r->i_inc; - memmove (r->buffer, r->buffer + r->sample_size, - r->buffer_len - r->sample_size); - - memcpy (r->buffer + r->buffer_len - r->sample_size, buffer->data, - r->sample_size); - r->buffer_filled = MIN (r->buffer_filled + r->sample_size, r->buffer_len); - - audioresample_buffer_unref (buffer); - } - - switch (r->format) { - case RESAMPLE_FORMAT_S16: - for (i = 0; i < r->n_channels; i++) { - double acc = 0; - double offset; - double x; - - for (j = 0; j < r->filter_length; j++) { - offset = (r->i_start + j * r->i_inc) * r->o_inc; - x = *(int16_t *) (r->buffer + i * sizeof (int16_t) + - j * r->sample_size); - acc += - resample_sinc_window (offset, r->filter_length * 0.5, - r->sinc_scale) * x; - } - if (acc < -32768.0) - acc = -32768.0; - if (acc > 32767.0) - acc = 32767.0; - - *(int16_t *) (r->o_buf + i * sizeof (int16_t)) = rint (acc); - } - break; - case RESAMPLE_FORMAT_S32: - for (i = 0; i < r->n_channels; i++) { - double acc = 0; - double offset; - double x; - - for (j = 0; j < r->filter_length; j++) { - offset = (r->i_start + j * r->i_inc) * r->o_inc; - x = *(int32_t *) (r->buffer + i * sizeof (int32_t) + - j * r->sample_size); - acc += - resample_sinc_window (offset, r->filter_length * 0.5, - r->sinc_scale) * x; - } - if (acc < -2147483648.0) - acc = -2147483648.0; - if (acc > 2147483647.0) - acc = 2147483647.0; - - *(int32_t *) (r->o_buf + i * sizeof (int32_t)) = rint (acc); - } - break; - case RESAMPLE_FORMAT_F32: - for (i = 0; i < r->n_channels; i++) { - double acc = 0; - double offset; - double x; - - for (j = 0; j < r->filter_length; j++) { - offset = (r->i_start + j * r->i_inc) * r->o_inc; - x = *(float *) (r->buffer + i * sizeof (float) + - j * r->sample_size); - acc += - resample_sinc_window (offset, r->filter_length * 0.5, - r->sinc_scale) * x; - } - - *(float *) (r->o_buf + i * sizeof (float)) = acc; - } - break; - case RESAMPLE_FORMAT_F64: - for (i = 0; i < r->n_channels; i++) { - double acc = 0; - double offset; - double x; - - for (j = 0; j < r->filter_length; j++) { - offset = (r->i_start + j * r->i_inc) * r->o_inc; - x = *(double *) (r->buffer + i * sizeof (double) + - j * r->sample_size); - acc += - resample_sinc_window (offset, r->filter_length * 0.5, - r->sinc_scale) * x; - } - - *(double *) (r->o_buf + i * sizeof (double)) = acc; - } - break; - } - - r->i_start -= 1.0; - r->o_buf += r->sample_size; - r->o_size -= r->sample_size; - } -} |