mirror of
https://github.com/reactos/reactos.git
synced 2024-08-20 18:35:32 +00:00
533 lines
13 KiB
C
533 lines
13 KiB
C
/*
|
|
** Copyright (c) 2002-2016, 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/erikd/libsamplerate/blob/master/COPYING
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
|
|
static int psrc_set_converter (SRC_PRIVATE *psrc, int converter_type) ;
|
|
|
|
|
|
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 ;
|
|
psrc->mode = SRC_MODE_PROCESS ;
|
|
|
|
if (psrc_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_callback_new (src_callback_t func, int converter_type, int channels, int *error, void* cb_data)
|
|
{ SRC_STATE *src_state ;
|
|
|
|
if (func == NULL)
|
|
{ if (error)
|
|
*error = SRC_ERR_BAD_CALLBACK ;
|
|
return NULL ;
|
|
} ;
|
|
|
|
if (error != NULL)
|
|
*error = 0 ;
|
|
|
|
if ((src_state = src_new (converter_type, channels, error)) == NULL)
|
|
return NULL ;
|
|
|
|
src_reset (src_state) ;
|
|
|
|
((SRC_PRIVATE*) src_state)->mode = SRC_MODE_CALLBACK ;
|
|
((SRC_PRIVATE*) src_state)->callback_func = func ;
|
|
((SRC_PRIVATE*) src_state)->user_callback_data = cb_data ;
|
|
|
|
return src_state ;
|
|
} /* src_callback_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->vari_process == NULL || psrc->const_process == NULL)
|
|
return SRC_ERR_BAD_PROC_PTR ;
|
|
|
|
if (psrc->mode != SRC_MODE_PROCESS)
|
|
return SRC_ERR_BAD_MODE ;
|
|
|
|
/* Check for valid SRC_DATA first. */
|
|
if (data == NULL)
|
|
return SRC_ERR_BAD_DATA ;
|
|
|
|
/* And that data_in and data_out are valid. */
|
|
if (data->data_in == NULL || data->data_out == NULL)
|
|
return SRC_ERR_BAD_DATA_PTR ;
|
|
|
|
/* Check src_ratio is in range. */
|
|
if (is_bad_src_ratio (data->src_ratio))
|
|
return SRC_ERR_BAD_SRC_RATIO ;
|
|
|
|
if (data->input_frames < 0)
|
|
data->input_frames = 0 ;
|
|
if (data->output_frames < 0)
|
|
data->output_frames = 0 ;
|
|
|
|
if (data->data_in < data->data_out)
|
|
{ if (data->data_in + data->input_frames * psrc->channels > data->data_out)
|
|
{ /*-printf ("\n\ndata_in: %p data_out: %p\n",
|
|
(void*) (data->data_in + data->input_frames * psrc->channels), (void*) data->data_out) ;-*/
|
|
return SRC_ERR_DATA_OVERLAP ;
|
|
} ;
|
|
}
|
|
else if (data->data_out + data->output_frames * psrc->channels > data->data_in)
|
|
{ /*-printf ("\n\ndata_in : %p ouput frames: %ld data_out: %p\n", (void*) data->data_in, data->output_frames, (void*) data->data_out) ;
|
|
|
|
printf ("data_out: %p (%p) data_in: %p\n", (void*) data->data_out,
|
|
(void*) (data->data_out + data->input_frames * psrc->channels), (void*) data->data_in) ;-*/
|
|
return SRC_ERR_DATA_OVERLAP ;
|
|
} ;
|
|
|
|
/* 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. */
|
|
if (fabs (psrc->last_ratio - data->src_ratio) < 1e-15)
|
|
error = psrc->const_process (psrc, data) ;
|
|
else
|
|
error = psrc->vari_process (psrc, data) ;
|
|
|
|
return error ;
|
|
} /* src_process */
|
|
|
|
long
|
|
src_callback_read (SRC_STATE *state, double src_ratio, long frames, float *data)
|
|
{ SRC_PRIVATE *psrc ;
|
|
SRC_DATA src_data ;
|
|
|
|
long output_frames_gen ;
|
|
int error = 0 ;
|
|
|
|
if (state == NULL)
|
|
return 0 ;
|
|
|
|
if (frames <= 0)
|
|
return 0 ;
|
|
|
|
psrc = (SRC_PRIVATE*) state ;
|
|
|
|
if (psrc->mode != SRC_MODE_CALLBACK)
|
|
{ psrc->error = SRC_ERR_BAD_MODE ;
|
|
return 0 ;
|
|
} ;
|
|
|
|
if (psrc->callback_func == NULL)
|
|
{ psrc->error = SRC_ERR_NULL_CALLBACK ;
|
|
return 0 ;
|
|
} ;
|
|
|
|
memset (&src_data, 0, sizeof (src_data)) ;
|
|
|
|
/* Check src_ratio is in range. */
|
|
if (is_bad_src_ratio (src_ratio))
|
|
{ psrc->error = SRC_ERR_BAD_SRC_RATIO ;
|
|
return 0 ;
|
|
} ;
|
|
|
|
/* Switch modes temporarily. */
|
|
src_data.src_ratio = src_ratio ;
|
|
src_data.data_out = data ;
|
|
src_data.output_frames = frames ;
|
|
|
|
src_data.data_in = psrc->saved_data ;
|
|
src_data.input_frames = psrc->saved_frames ;
|
|
|
|
output_frames_gen = 0 ;
|
|
while (output_frames_gen < frames)
|
|
{ /* Use a dummy array for the case where the callback function
|
|
** returns without setting the ptr.
|
|
*/
|
|
float dummy [1] ;
|
|
|
|
if (src_data.input_frames == 0)
|
|
{ float *ptr = dummy ;
|
|
|
|
src_data.input_frames = psrc->callback_func (psrc->user_callback_data, &ptr) ;
|
|
src_data.data_in = ptr ;
|
|
|
|
if (src_data.input_frames == 0)
|
|
src_data.end_of_input = 1 ;
|
|
} ;
|
|
|
|
/*
|
|
** Now call process function. However, we need to set the mode
|
|
** to SRC_MODE_PROCESS first and when we return set it back to
|
|
** SRC_MODE_CALLBACK.
|
|
*/
|
|
psrc->mode = SRC_MODE_PROCESS ;
|
|
error = src_process (state, &src_data) ;
|
|
psrc->mode = SRC_MODE_CALLBACK ;
|
|
|
|
if (error != 0)
|
|
break ;
|
|
|
|
src_data.data_in += src_data.input_frames_used * psrc->channels ;
|
|
src_data.input_frames -= src_data.input_frames_used ;
|
|
|
|
src_data.data_out += src_data.output_frames_gen * psrc->channels ;
|
|
src_data.output_frames -= src_data.output_frames_gen ;
|
|
|
|
output_frames_gen += src_data.output_frames_gen ;
|
|
|
|
if (src_data.end_of_input == SRC_TRUE && src_data.output_frames_gen == 0)
|
|
break ;
|
|
} ;
|
|
|
|
psrc->saved_data = src_data.data_in ;
|
|
psrc->saved_frames = src_data.input_frames ;
|
|
|
|
if (error != 0)
|
|
{ psrc->error = error ;
|
|
return 0 ;
|
|
} ;
|
|
|
|
return output_frames_gen ;
|
|
} /* src_callback_read */
|
|
|
|
/*==========================================================================
|
|
*/
|
|
|
|
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->vari_process == NULL || psrc->const_process == NULL)
|
|
return SRC_ERR_BAD_PROC_PTR ;
|
|
|
|
if (is_bad_src_ratio (new_ratio))
|
|
return SRC_ERR_BAD_SRC_RATIO ;
|
|
|
|
psrc->last_ratio = new_ratio ;
|
|
|
|
return SRC_ERR_NO_ERROR ;
|
|
} /* src_set_ratio */
|
|
|
|
int
|
|
src_get_channels (SRC_STATE *state)
|
|
{ SRC_PRIVATE *psrc ;
|
|
|
|
psrc = (SRC_PRIVATE*) state ;
|
|
|
|
if (psrc == NULL)
|
|
return SRC_ERR_BAD_STATE ;
|
|
if (psrc->vari_process == NULL || psrc->const_process == NULL)
|
|
return SRC_ERR_BAD_PROC_PTR ;
|
|
|
|
return psrc->channels ;
|
|
} /* src_get_channels */
|
|
|
|
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->saved_data = NULL ;
|
|
psrc->saved_frames = 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 PACKAGE "-" VERSION " (c) 2002-2008 Erik de Castro Lopo" ;
|
|
} /* src_get_version */
|
|
|
|
int
|
|
src_is_valid_ratio (double ratio)
|
|
{
|
|
if (is_bad_src_ratio (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 or SRC_DATA->data_in is NULL." ;
|
|
case SRC_ERR_NO_PRIVATE :
|
|
return "Internal error. No private data." ;
|
|
|
|
case SRC_ERR_BAD_SRC_RATIO :
|
|
return "SRC ratio outside [1/" SRC_MAX_RATIO_STR ", " SRC_MAX_RATIO_STR "] 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_BAD_CALLBACK :
|
|
return "Supplied callback function pointer is NULL." ;
|
|
case SRC_ERR_BAD_MODE :
|
|
return "Calling mode differs from initialisation mode (ie process v callback)." ;
|
|
case SRC_ERR_NULL_CALLBACK :
|
|
return "Callback function pointer is NULL in src_callback_read ()." ;
|
|
case SRC_ERR_NO_VARIABLE_RATIO :
|
|
return "This converter only allows constant conversion ratios." ;
|
|
case SRC_ERR_SINC_PREPARE_DATA_BAD_LEN :
|
|
return "Internal error : Bad length in prepare_data ()." ;
|
|
case SRC_ERR_BAD_INTERNAL_STATE :
|
|
return "Error : Someone is trampling on my internal state." ;
|
|
|
|
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_delete (src_state) ;
|
|
|
|
return error ;
|
|
} /* src_simple */
|
|
|
|
void
|
|
src_short_to_float_array (const short *in, float *out, int len)
|
|
{
|
|
while (len)
|
|
{ len -- ;
|
|
out [len] = (float) (in [len] / (1.0 * 0x8000)) ;
|
|
} ;
|
|
|
|
return ;
|
|
} /* src_short_to_float_array */
|
|
|
|
void
|
|
src_float_to_short_array (const float *in, short *out, int len)
|
|
{ double scaled_value ;
|
|
|
|
while (len)
|
|
{ len -- ;
|
|
|
|
scaled_value = in [len] * (8.0 * 0x10000000) ;
|
|
if (CPU_CLIPS_POSITIVE == 0 && scaled_value >= (1.0 * 0x7FFFFFFF))
|
|
{ out [len] = 32767 ;
|
|
continue ;
|
|
} ;
|
|
if (CPU_CLIPS_NEGATIVE == 0 && scaled_value <= (-8.0 * 0x10000000))
|
|
{ out [len] = -32768 ;
|
|
continue ;
|
|
} ;
|
|
|
|
out [len] = (short) (lrint (scaled_value) >> 16) ;
|
|
} ;
|
|
|
|
} /* src_float_to_short_array */
|
|
|
|
void
|
|
src_int_to_float_array (const int *in, float *out, int len)
|
|
{
|
|
while (len)
|
|
{ len -- ;
|
|
out [len] = (float) (in [len] / (8.0 * 0x10000000)) ;
|
|
} ;
|
|
|
|
return ;
|
|
} /* src_int_to_float_array */
|
|
|
|
void
|
|
src_float_to_int_array (const float *in, int *out, int len)
|
|
{ double scaled_value ;
|
|
|
|
while (len)
|
|
{ len -- ;
|
|
|
|
scaled_value = in [len] * (8.0 * 0x10000000) ;
|
|
if (CPU_CLIPS_POSITIVE == 0 && scaled_value >= (1.0 * 0x7FFFFFFF))
|
|
{ out [len] = 0x7fffffff ;
|
|
continue ;
|
|
} ;
|
|
if (CPU_CLIPS_NEGATIVE == 0 && scaled_value <= (-8.0 * 0x10000000))
|
|
{ out [len] = -1 - 0x7fffffff ;
|
|
continue ;
|
|
} ;
|
|
|
|
out [len] = lrint (scaled_value) ;
|
|
} ;
|
|
|
|
} /* src_float_to_int_array */
|
|
|
|
/*==============================================================================
|
|
** Private functions.
|
|
*/
|
|
|
|
static int
|
|
psrc_set_converter (SRC_PRIVATE *psrc, int converter_type)
|
|
{
|
|
if (sinc_set_converter (psrc, converter_type) == SRC_ERR_NO_ERROR)
|
|
return SRC_ERR_NO_ERROR ;
|
|
|
|
if (zoh_set_converter (psrc, converter_type) == SRC_ERR_NO_ERROR)
|
|
return SRC_ERR_NO_ERROR ;
|
|
|
|
if (linear_set_converter (psrc, converter_type) == SRC_ERR_NO_ERROR)
|
|
return SRC_ERR_NO_ERROR ;
|
|
|
|
return SRC_ERR_BAD_CONVERTER ;
|
|
} /* psrc_set_converter */
|
|
|