--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst/audioresample/resample.c	Wed Sep 01 12:16:41 2010 +0100
@@ -0,0 +1,395 @@
+/* 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
+#ifndef __SYMBIAN32__
+#include <config.h>
+#else
+#include "config.h"
+#endif
+#endif
+
+
+#include <string.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#ifndef __SYMBIAN32__
+#include <liboil/liboil.h>
+#endif
+
+#include "resample.h"
+#include "buffer.h"
+#include "debug.h"
+
+void resample_scale_ref (ResampleState * r);
+void resample_scale_functable (ResampleState * r);
+
+GST_DEBUG_CATEGORY (libaudioresample_debug);
+
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+resample_init (void)
+{
+  static int inited = 0;
+#ifndef __SYMBIAN32__
+  if (!inited) {
+    oil_init ();
+    inited = 1;
+    GST_DEBUG_CATEGORY_INIT (libaudioresample_debug, "libaudioresample", 0,
+        "audio resampling library");
+
+  }
+#endif  
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+ResampleState *
+resample_new (void)
+{
+  ResampleState *r;
+
+  r = malloc (sizeof (ResampleState));
+  memset (r, 0, sizeof (ResampleState));
+
+  r->filter_length = 16;
+
+  r->i_start = 0;
+  if (r->filter_length & 1) {
+    r->o_start = 0;
+  } else {
+    r->o_start = r->o_inc * 0.5;
+  }
+
+  r->queue = audioresample_buffer_queue_new ();
+  r->out_tmp = malloc (10000 * sizeof (double));
+
+  r->need_reinit = 1;
+
+  return r;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_free (ResampleState * r)
+{
+  if (r->buffer) {
+    free (r->buffer);
+  }
+  if (r->ft) {
+    functable_free (r->ft);
+  }
+  if (r->queue) {
+    audioresample_buffer_queue_free (r->queue);
+  }
+  if (r->out_tmp) {
+    free (r->out_tmp);
+  }
+
+  free (r);
+}
+
+static void
+resample_buffer_free (AudioresampleBuffer * buffer, void *priv)
+{
+  if (buffer->priv2) {
+    ((void (*)(void *)) buffer->priv2) (buffer->priv);
+  }
+}
+
+/*
+ * free_func: a function that frees the given closure.  If NULL, caller is
+ *            responsible for freeing.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+resample_add_input_data (ResampleState * r, void *data, int size,
+    void (*free_func) (void *), void *closure)
+{
+  AudioresampleBuffer *buffer;
+
+  RESAMPLE_DEBUG ("data %p size %d", data, size);
+
+  buffer = audioresample_buffer_new_with_data (data, size);
+  buffer->free = resample_buffer_free;
+  buffer->priv2 = (void *) free_func;
+  buffer->priv = closure;
+
+  audioresample_buffer_queue_push (r->queue, buffer);
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_input_flush (ResampleState * r)
+{
+  RESAMPLE_DEBUG ("flush");
+
+  audioresample_buffer_queue_flush (r->queue);
+  r->buffer_filled = 0;
+  r->need_reinit = 1;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_input_pushthrough (ResampleState * r)
+{
+  AudioresampleBuffer *buffer;
+  int filter_bytes;
+  int buffer_filled;
+
+  if (r->sample_size == 0)
+    return;
+
+  filter_bytes = r->filter_length * r->sample_size;
+  buffer_filled = r->buffer_filled;
+
+  RESAMPLE_DEBUG ("pushthrough filter_bytes %d, filled %d",
+      filter_bytes, buffer_filled);
+
+  /* if we have no pending samples, we don't need to do anything. */
+  if (buffer_filled <= 0)
+    return;
+
+  /* send filter_length/2 number of samples so we can get to the
+   * last queued samples */
+  buffer = audioresample_buffer_new_and_alloc (filter_bytes / 2);
+  memset (buffer->data, 0, buffer->length);
+
+  RESAMPLE_DEBUG ("pushthrough %u", buffer->length);
+
+  audioresample_buffer_queue_push (r->queue, buffer);
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_input_eos (ResampleState * r)
+{
+  RESAMPLE_DEBUG ("EOS");
+  resample_input_pushthrough (r);
+  r->eos = 1;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+int
+resample_get_output_size_for_input (ResampleState * r, int size)
+{
+  int outsize;
+  double outd;
+  int avail;
+  int filter_bytes;
+  int buffer_filled;
+
+  if (r->sample_size == 0)
+    return 0;
+
+  filter_bytes = r->filter_length * r->sample_size;
+  buffer_filled = filter_bytes / 2 - r->buffer_filled / 2;
+
+  avail =
+      audioresample_buffer_queue_get_depth (r->queue) + size - buffer_filled;
+
+  RESAMPLE_DEBUG ("avail %d, o_rate %f, i_rate %f, filter_bytes %d, filled %d",
+      avail, r->o_rate, r->i_rate, filter_bytes, buffer_filled);
+  if (avail <= 0)
+    return 0;
+
+  outd = (double) avail *r->o_rate / r->i_rate;
+
+  outsize = (int) floor (outd);
+
+  /* round off for sample size */
+  outsize -= outsize % r->sample_size;
+
+  return outsize;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+int
+resample_get_input_size_for_output (ResampleState * r, int size)
+{
+  int outsize;
+  double outd;
+  int avail;
+
+  if (r->sample_size == 0)
+    return 0;
+
+  avail = size;
+
+  RESAMPLE_DEBUG ("size %d, o_rate %f, i_rate %f", avail, r->o_rate, r->i_rate);
+  outd = (double) avail *r->i_rate / r->o_rate;
+
+  outsize = (int) ceil (outd);
+
+  /* round off for sample size */
+  outsize -= outsize % r->sample_size;
+
+  return outsize;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+int
+resample_get_output_size (ResampleState * r)
+{
+  return resample_get_output_size_for_input (r, 0);
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+int
+resample_get_output_data (ResampleState * r, void *data, int size)
+{
+  r->o_buf = data;
+  r->o_size = size;
+
+  if (size == 0)
+    return 0;
+
+  switch (r->method) {
+    case 0:
+      resample_scale_ref (r);
+      break;
+    case 1:
+      resample_scale_functable (r);
+      break;
+    default:
+      break;
+  }
+
+  return size - r->o_size;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_set_filter_length (ResampleState * r, int length)
+{
+  r->filter_length = length;
+  r->need_reinit = 1;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_set_input_rate (ResampleState * r, double rate)
+{
+  r->i_rate = rate;
+  r->need_reinit = 1;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_set_output_rate (ResampleState * r, double rate)
+{
+  r->o_rate = rate;
+  r->need_reinit = 1;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_set_n_channels (ResampleState * r, int n_channels)
+{
+  r->n_channels = n_channels;
+  r->sample_size = r->n_channels * resample_format_size (r->format);
+  r->need_reinit = 1;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_set_format (ResampleState * r, ResampleFormat format)
+{
+  r->format = format;
+  r->sample_size = r->n_channels * resample_format_size (r->format);
+  r->need_reinit = 1;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+resample_set_method (ResampleState * r, int method)
+{
+  r->method = method;
+  r->need_reinit = 1;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+int
+resample_format_size (ResampleFormat format)
+{
+  switch (format) {
+    case RESAMPLE_FORMAT_S16:
+      return 2;
+    case RESAMPLE_FORMAT_S32:
+    case RESAMPLE_FORMAT_F32:
+      return 4;
+    case RESAMPLE_FORMAT_F64:
+      return 8;
+  }
+  return 0;
+}