1 files changed, 301 insertions, 0 deletions
diff --git a/libk3b/plugin/libsamplerate/samplerate.c b/libk3b/plugin/libsamplerate/samplerate.c
new file mode 100644
index 0000000..58ad40a
--- /dev/null
+++ b/libk3b/plugin/libsamplerate/samplerate.c
@@ -0,0 +1,301 @@
+/*
+** Copyright (C) 2002,2003 Erik de Castro Lopo <[email protected]>
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program 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 General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Steet, Fifth Floor, Boston, MA 02110-1301, USA.
+*/
+
+#include	<stdio.h>
+#include	<stdlib.h>
+#include	<string.h>
+
+#include	"config.h"
+
+#include	"samplerate.h"
+#include	"common.h"
+
+SRC_STATE *
+src_new (int converter_type, int channels, int *error)
+{	SRC_PRIVATE	*psrc ;
+
+	if (error)
+		*error = SRC_ERR_NO_ERROR ;
+
+	if (channels < 1)
+	{	if (error)
+			*error = SRC_ERR_BAD_CHANNEL_COUNT ;
+		return NULL ;
+		} ;
+
+	if ((psrc = calloc (1, sizeof (*psrc))) == NULL)
+	{	if (error)
+			*error = SRC_ERR_MALLOC_FAILED ;
+		return NULL ;
+		} ;
+
+	psrc->channels = channels ;
+
+	if (sinc_set_converter (psrc, converter_type) != SRC_ERR_NO_ERROR &&
+			zoh_set_converter (psrc, converter_type) != SRC_ERR_NO_ERROR &&
+				linear_set_converter (psrc, converter_type) != SRC_ERR_NO_ERROR)
+	{	if (error)
+			*error = SRC_ERR_BAD_CONVERTER ;
+		free (psrc) ;
+		psrc = NULL ;
+		} ;
+
+	src_reset ((SRC_STATE*) psrc) ;
+
+	return (SRC_STATE*) psrc ;
+} /* src_new */
+
+SRC_STATE *
+src_delete (SRC_STATE *state)
+{	SRC_PRIVATE *psrc ;
+
+	psrc = (SRC_PRIVATE*) state ;
+	if (psrc)
+	{	if (psrc->private_data)
+			free (psrc->private_data) ;
+		memset (psrc, 0, sizeof (SRC_PRIVATE)) ;
+		free (psrc) ;
+		} ;
+
+	return NULL ;
+} /* src_state */
+
+int
+src_process (SRC_STATE *state, SRC_DATA *data)
+{	SRC_PRIVATE *psrc ;
+	int error ;
+
+	psrc = (SRC_PRIVATE*) state ;
+
+	if (psrc == NULL)
+		return SRC_ERR_BAD_STATE ;
+	if (psrc->process == NULL)
+		return SRC_ERR_BAD_PROC_PTR ;
+
+	/* Check for valid SRC_DATA first. */
+	if (data == NULL)
+		return SRC_ERR_BAD_DATA ;
+	/* Check src_ratio is in range. */
+	if (data->src_ratio < (1.0 / SRC_MAX_RATIO) || data->src_ratio > (1.0 * SRC_MAX_RATIO))
+		return SRC_ERR_BAD_SRC_RATIO ;
+
+	/* And that data_in and data_out are valid. */
+	if (data->data_in == NULL || data->data_out == NULL)
+		return SRC_ERR_BAD_DATA_PTR ;
+
+	if (data->data_in == NULL)
+		data->input_frames = 0 ;
+	
+	if (data->data_in < data->data_out)
+	{	if (data->data_in + data->input_frames * psrc->channels > data->data_out)
+		{	/*-printf ("data_in: %p    data_out: %p\n", 
+				data->data_in + data->input_frames * psrc->channels, data->data_out) ;-*/
+			return SRC_ERR_DATA_OVERLAP ;
+			} ;
+		}
+	else if (data->data_out + data->output_frames * psrc->channels > data->data_in)
+	{	/*-printf ("data_out: %p (%p)    data_in: %p\n", data->data_out, 
+			data->data_out + data->output_frames * psrc->channels, data->data_in) ;-*/
+		return SRC_ERR_DATA_OVERLAP ;
+		} ;
+
+	if (data->input_frames < 0)
+		data->input_frames = 0 ;
+	if (data->output_frames < 0)
+		data->output_frames = 0 ;
+
+	/* Set the input and output counts to zero. */
+	data->input_frames_used = 0 ;
+	data->output_frames_gen = 0 ;
+
+	/* Special case for when last_ratio has not been set. */
+	if (psrc->last_ratio < (1.0 / SRC_MAX_RATIO))
+		psrc->last_ratio = data->src_ratio ;
+
+	/* Now process. */
+	error = psrc->process (psrc, data) ;
+
+	return error ;
+} /* src_process */
+
+int
+src_set_ratio (SRC_STATE *state, double new_ratio)
+{	SRC_PRIVATE *psrc ;
+
+	psrc = (SRC_PRIVATE*) state ;
+
+	if (psrc == NULL)
+		return SRC_ERR_BAD_STATE ;
+	if (psrc->process == NULL)
+		return SRC_ERR_BAD_PROC_PTR ;
+
+	psrc->last_ratio = new_ratio ;
+
+	return SRC_ERR_NO_ERROR ;
+} /* src_set_ratio */
+
+int
+src_reset (SRC_STATE *state)
+{	SRC_PRIVATE *psrc ;
+
+	if ((psrc = (SRC_PRIVATE*) state) == NULL)
+		return SRC_ERR_BAD_STATE ;
+
+	if (psrc->reset != NULL)
+		psrc->reset (psrc) ;
+
+	psrc->last_position = 0.0 ;
+	psrc->last_ratio = 0.0 ;
+
+	psrc->error = SRC_ERR_NO_ERROR ;
+
+	return SRC_ERR_NO_ERROR ;
+} /* src_reset */
+
+/*==============================================================================
+**	Control functions.
+*/
+
+const char *
+src_get_name (int converter_type)
+{	const char *desc ;
+
+	if ((desc = sinc_get_name (converter_type)) != NULL)
+		return desc ;
+
+	if ((desc = zoh_get_name (converter_type)) != NULL)
+		return desc ;
+
+	if ((desc = linear_get_name (converter_type)) != NULL)
+		return desc ;
+
+	return NULL ;
+} /* src_get_name */
+
+const char *
+src_get_description (int converter_type)
+{	const char *desc ;
+
+	if ((desc = sinc_get_description (converter_type)) != NULL)
+		return desc ;
+
+	if ((desc = zoh_get_description (converter_type)) != NULL)
+		return desc ;
+
+	if ((desc = linear_get_description (converter_type)) != NULL)
+		return desc ;
+
+	return NULL ;
+} /* src_get_description */
+
+const char *
+src_get_version (void)
+{	return "libsamplerate-k3b";/*PACKAGE "-" VERSION ;*/
+} /* src_get_version */
+
+int
+src_is_valid_ratio (double ratio)
+{
+	if (ratio < (1.0 / SRC_MAX_RATIO) || ratio > (1.0 * SRC_MAX_RATIO))
+		return SRC_FALSE ;
+
+	return SRC_TRUE ;
+} /* src_is_valid_ratio */
+
+/*==============================================================================
+**	Error reporting functions.
+*/
+
+int
+src_error (SRC_STATE *state)
+{	if (state)
+		return ((SRC_PRIVATE*) state)->error ;
+	return SRC_ERR_NO_ERROR ;
+} /* src_error */
+
+const char*
+src_strerror (int error)
+{
+	switch (error)
+	{	case SRC_ERR_NO_ERROR :
+				return "No error" ;
+		case SRC_ERR_MALLOC_FAILED :
+				return "Malloc failed." ;
+		case SRC_ERR_BAD_STATE :
+				return "SRC_STATE pointer is NULL." ;
+		case SRC_ERR_BAD_DATA :
+				return "SRC_DATA pointer is NULL." ;
+		case SRC_ERR_BAD_DATA_PTR :
+				return "SRC_DATA->data_out is NULL." ;
+		case SRC_ERR_NO_PRIVATE :
+				return "Internal error. No private data." ;
+		case SRC_ERR_BAD_SRC_RATIO :
+				return "SRC ratio outside [-12, 12] range." ;
+		case SRC_ERR_BAD_SINC_STATE :
+				return "src_process() called without reset after end_of_input." ;
+		case SRC_ERR_BAD_PROC_PTR :
+				return "Internal error. No process pointer." ;
+		case SRC_ERR_SHIFT_BITS :
+				return "Internal error. SHIFT_BITS too large." ;
+		case SRC_ERR_FILTER_LEN :
+				return "Internal error. Filter length too large." ;
+		case SRC_ERR_BAD_CONVERTER :
+				return "Bad converter number." ;
+		case SRC_ERR_BAD_CHANNEL_COUNT :
+				return "Channel count must be >= 1." ;
+		case SRC_ERR_SINC_BAD_BUFFER_LEN :
+				return "Internal error. Bad buffer length. Please report this." ;
+		case SRC_ERR_SIZE_INCOMPATIBILITY :
+				return "Internal error. Input data / internal buffer size difference. Please report this." ;
+		case SRC_ERR_BAD_PRIV_PTR :
+				return "Internal error. Private pointer is NULL. Please report this." ;
+
+		case SRC_ERR_DATA_OVERLAP :
+				return "Input and output data arrays overlap." ;
+
+		case SRC_ERR_MAX_ERROR :
+				return "Placeholder. No error defined for this error number." ;
+
+		default : 						break ;
+		}
+
+	return NULL ;
+} /* src_strerror */
+
+/*==============================================================================
+**	Simple interface for performing a single conversion from input buffer to
+** output buffer at a fixed conversion ratio.
+*/
+
+int
+src_simple (SRC_DATA *src_data, int converter, int channels)
+{	SRC_STATE	*src_state ;
+	int 		error ;
+
+	if ((src_state = src_new (converter, channels, &error)) == NULL)
+		return error ;
+
+	src_data->end_of_input = 1 ; /* Only one buffer worth of input. */
+
+	error = src_process (src_state, src_data) ;
+
+	src_state = src_delete (src_state) ;
+
+	return error ;
+} /* src_simple */
+