Do our own resampling

1 files changed, 0 insertions, 290 deletions

diff --git a/lib/libsamplerate/libsamplerate-0.2.2/src/src_zoh.c b/lib/libsamplerate/libsamplerate-0.2.2/src/src_zoh.c
deleted file mode 100755
index c389d6cf..00000000
--- a/lib/libsamplerate/libsamplerate-0.2.2/src/src_zoh.c
+++ /dev/null
@@ -1,290 +0,0 @@
-/*
-** Copyright (c) 2002-2021, Erik de Castro Lopo <erikd@mega-nerd.com>
-** All rights reserved.
-**
-** This code is released under 2-clause BSD license. Please see the
-** file at : https://github.com/libsndfile/libsamplerate/blob/master/COPYING
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-#include "common.h"
-
-static SRC_ERROR zoh_vari_process (SRC_STATE *state, SRC_DATA *data) ;
-static void zoh_reset (SRC_STATE *state) ;
-static SRC_STATE *zoh_copy (SRC_STATE *state) ;
-static void zoh_close (SRC_STATE *state) ;
-
-/*========================================================================================
-*/
-
-#define	ZOH_MAGIC_MARKER	MAKE_MAGIC ('s', 'r', 'c', 'z', 'o', 'h')
-
-typedef struct
-{	int		zoh_magic_marker ;
-	bool	dirty ;
-	long	in_count, in_used ;
-	long	out_count, out_gen ;
-	float	*last_value ;
-} ZOH_DATA ;
-
-static SRC_STATE_VT zoh_state_vt =
-{
-	zoh_vari_process,
-	zoh_vari_process,
-	zoh_reset,
-	zoh_copy,
-	zoh_close
-} ;
-
-/*----------------------------------------------------------------------------------------
-*/
-
-static SRC_ERROR
-zoh_vari_process (SRC_STATE *state, SRC_DATA *data)
-{	ZOH_DATA 	*priv ;
-	float		src_ratio, input_index, rem ;
-	int			ch ;
-
-	if (data->input_frames <= 0)
-		return SRC_ERR_NO_ERROR ;
-
-	if (state->private_data == NULL)
-		return SRC_ERR_NO_PRIVATE ;
-
-	priv = (ZOH_DATA*) state->private_data ;
-
-	if (!priv->dirty)
-	{	/* If we have just been reset, set the last_value data. */
-		for (ch = 0 ; ch < state->channels ; ch++)
-			priv->last_value [ch] = data->data_in [ch] ;
-		priv->dirty = true ;
-		} ;
-
-	priv->in_count = data->input_frames * state->channels ;
-	priv->out_count = data->output_frames * state->channels ;
-	priv->in_used = priv->out_gen = 0 ;
-
-	src_ratio = state->last_ratio ;
-
-	if (is_bad_src_ratio (src_ratio))
-		return SRC_ERR_BAD_INTERNAL_STATE ;
-
-	input_index = state->last_position ;
-
-	/* Calculate samples before first sample in input array. */
-	while (input_index < 1.0 && priv->out_gen < priv->out_count)
-	{
-		if (priv->in_used + state->channels * input_index >= priv->in_count)
-			break ;
-
-		if (priv->out_count > 0 && fabs (state->last_ratio - data->src_ratio) > SRC_MIN_RATIO_DIFF)
-			src_ratio = state->last_ratio + priv->out_gen * (data->src_ratio - state->last_ratio) / priv->out_count ;
-
-		for (ch = 0 ; ch < state->channels ; ch++)
-		{	data->data_out [priv->out_gen] = priv->last_value [ch] ;
-			priv->out_gen ++ ;
-			} ;
-
-		/* Figure out the next index. */
-		input_index += 1.0 / src_ratio ;
-		} ;
-
-	rem = fmod_one (input_index) ;
-	priv->in_used += state->channels * psf_lrint (input_index - rem) ;
-	input_index = rem ;
-
-	/* Main processing loop. */
-	while (priv->out_gen < priv->out_count && priv->in_used + state->channels * input_index <= priv->in_count)
-	{
-		if (priv->out_count > 0 && fabs (state->last_ratio - data->src_ratio) > SRC_MIN_RATIO_DIFF)
-			src_ratio = state->last_ratio + priv->out_gen * (data->src_ratio - state->last_ratio) / priv->out_count ;
-
-		for (ch = 0 ; ch < state->channels ; ch++)
-		{	data->data_out [priv->out_gen] = data->data_in [priv->in_used - state->channels + ch] ;
-			priv->out_gen ++ ;
-			} ;
-
-		/* Figure out the next index. */
-		input_index += 1.0 / src_ratio ;
-		rem = fmod_one (input_index) ;
-
-		priv->in_used += state->channels * psf_lrint (input_index - rem) ;
-		input_index = rem ;
-		} ;
-
-	if (priv->in_used > priv->in_count)
-	{	input_index += (priv->in_used - priv->in_count) / state->channels ;
-		priv->in_used = priv->in_count ;
-		} ;
-
-	state->last_position = input_index ;
-
-	if (priv->in_used > 0)
-		for (ch = 0 ; ch < state->channels ; ch++)
-			priv->last_value [ch] = data->data_in [priv->in_used - state->channels + ch] ;
-
-	/* Save current ratio rather then target ratio. */
-	state->last_ratio = src_ratio ;
-
-	data->input_frames_used = priv->in_used / state->channels ;
-	data->output_frames_gen = priv->out_gen / state->channels ;
-
-	return SRC_ERR_NO_ERROR ;
-} /* zoh_vari_process */
-
-/*------------------------------------------------------------------------------
-*/
-
-LIBSAMPLERATE_DLL_PRIVATE const char*
-zoh_get_name (int src_enum)
-{
-	if (src_enum == SRC_ZERO_ORDER_HOLD)
-		return "ZOH Interpolator" ;
-
-	return NULL ;
-} /* zoh_get_name */
-
-LIBSAMPLERATE_DLL_PRIVATE const char*
-zoh_get_description (int src_enum)
-{
-	if (src_enum == SRC_ZERO_ORDER_HOLD)
-		return "Zero order hold interpolator, very fast, poor quality." ;
-
-	return NULL ;
-} /* zoh_get_descrition */
-
-static ZOH_DATA *
-zoh_data_new (int channels)
-{
-	assert (channels > 0) ;
-
-	ZOH_DATA *priv = (ZOH_DATA *) calloc (1, sizeof (ZOH_DATA)) ;
-	if (priv)
-	{
-		priv->zoh_magic_marker = ZOH_MAGIC_MARKER ;
-		priv->last_value = (float *) calloc (channels, sizeof (float)) ;
-		if (!priv->last_value)
-		{
-			free (priv) ;
-			priv = NULL ;
-		}
-	}
-
-	return priv ;
-}
-
-LIBSAMPLERATE_DLL_PRIVATE SRC_STATE *
-zoh_state_new (int channels, SRC_ERROR *error)
-{
-	assert (channels > 0) ;
-	assert (error != NULL) ;
-
-	SRC_STATE *state = (SRC_STATE *) calloc (1, sizeof (SRC_STATE)) ;
-	if (!state)
-	{
-		*error = SRC_ERR_MALLOC_FAILED ;
-		return NULL ;
-	}
-
-	state->channels = channels ;
-	state->mode = SRC_MODE_PROCESS ;
-
-	state->private_data = zoh_data_new (state->channels) ;
-	if (!state->private_data)
-	{
-		free (state) ;
-		*error = SRC_ERR_MALLOC_FAILED ;
-		return NULL ;
-	}
-
-	state->vt = &zoh_state_vt ;
-
-	zoh_reset (state) ;
-
-	*error = SRC_ERR_NO_ERROR ;
-
-	return state ;
-}
-
-/*===================================================================================
-*/
-
-static void
-zoh_reset (SRC_STATE *state)
-{	ZOH_DATA *priv ;
-
-	priv = (ZOH_DATA*) state->private_data ;
-	if (priv == NULL)
-		return ;
-
-	priv->dirty = false ;
-	memset (priv->last_value, 0, sizeof (float) * state->channels) ;
-
-	return ;
-} /* zoh_reset */
-
-static SRC_STATE *
-zoh_copy (SRC_STATE *state)
-{
-	assert (state != NULL) ;
-
-	if (state->private_data == NULL)
-		return NULL ;
-
-	SRC_STATE *to = (SRC_STATE *) calloc (1, sizeof (SRC_STATE)) ;
-	if (!to)
-		return NULL ;
-	memcpy (to, state, sizeof (SRC_STATE)) ;
-
-	ZOH_DATA* from_priv = (ZOH_DATA*) state->private_data ;
-	ZOH_DATA *to_priv = (ZOH_DATA *) calloc (1, sizeof (ZOH_DATA)) ;
-	if (!to_priv)
-	{
-		free (to) ;
-		return NULL ;
-	}
-
-	memcpy (to_priv, from_priv, sizeof (ZOH_DATA)) ;
-	to_priv->last_value = (float *) malloc (sizeof (float) * state->channels) ;
-	if (!to_priv->last_value)
-	{
-		free (to) ;
-		free (to_priv) ;
-		return NULL ;
-	}
-	memcpy (to_priv->last_value, from_priv->last_value, sizeof (float) * state->channels) ;
-
-	to->private_data = to_priv ;
-
-	return to ;
-} /* zoh_copy */
-
-static void
-zoh_close (SRC_STATE *state)
-{
-	if (state)
-	{
-		ZOH_DATA *zoh = (ZOH_DATA *) state->private_data ;
-		if (zoh)
-		{
-			if (zoh->last_value)
-			{
-				free (zoh->last_value) ;
-				zoh->last_value = NULL ;
-			}
-			free (zoh) ;
-			zoh = NULL ;
-		}
-		free (state) ;
-		state = NULL ;
-	}
-} /* zoh_close */