Logo Search packages:      
Sourcecode: libsamplerate version File versions  Download package

reset_test.c

/*
** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/

#include <stdio.h>
#include <stdlib.h>

#include <samplerate.h>

#include "util.h"

#define     BUFFER_LEN        2048
#define CB_READ_LEN           256

static void process_reset_test (int converter) ;
static void callback_reset_test (int converter) ;

static float data_one [BUFFER_LEN] ;
static float data_zero [BUFFER_LEN] ;

int
main (void)
{
      puts ("") ;

      process_reset_test (SRC_ZERO_ORDER_HOLD) ;
      process_reset_test (SRC_LINEAR) ;
      process_reset_test (SRC_SINC_FASTEST) ;

      callback_reset_test (SRC_ZERO_ORDER_HOLD) ;
      callback_reset_test (SRC_LINEAR) ;
      callback_reset_test (SRC_SINC_FASTEST) ;

      puts ("") ;

      return 0 ;
} /* main */

static void
process_reset_test (int converter)
{     static float output [BUFFER_LEN] ;

      SRC_STATE *src_state ;
      SRC_DATA src_data ;
      int k, error ;

      printf ("\tprocess_reset_test  (%-28s) ....... ", src_get_name (converter)) ;
      fflush (stdout) ;

      for (k = 0 ; k < BUFFER_LEN ; k++)
      {     data_one [k] = 1.0 ;
            data_zero [k] = 0.0 ;
            } ;

      /* Get a converter. */
      if ((src_state = src_new (converter, 1, &error)) == NULL)
      {     printf ("\n\nLine %d : src_new() failed : %s.\n\n", __LINE__, src_strerror (error)) ;
            exit (1) ;
            } ;

      /* Process a bunch of 1.0 valued samples. */
      src_data.data_in        = data_one ;
      src_data.data_out       = output ;
      src_data.input_frames   = BUFFER_LEN ;
      src_data.output_frames  = BUFFER_LEN ;
      src_data.src_ratio            = 0.9 ;
      src_data.end_of_input   = 1 ;

      if ((error = src_process (src_state, &src_data)) != 0)
      {     printf ("\n\nLine %d : src_simple () returned error : %s\n\n", __LINE__, src_strerror (error)) ;
            exit (1) ;
            } ;

      /* Reset the state of the converter.*/
      src_reset (src_state) ;

      /* Now process some zero data. */
      src_data.data_in        = data_zero ;
      src_data.data_out       = output ;
      src_data.input_frames   = BUFFER_LEN ;
      src_data.output_frames  = BUFFER_LEN ;
      src_data.src_ratio            = 0.9 ;
      src_data.end_of_input   = 1 ;

      if ((error = src_process (src_state, &src_data)) != 0)
      {     printf ("\n\nLine %d : src_simple () returned error : %s\n\n", __LINE__, src_strerror (error)) ;
            exit (1) ;
            } ;

      /* Finally make sure that the output data is zero ie reset was sucessful. */
      for (k = 0 ; k < BUFFER_LEN / 2 ; k++)
            if (output [k] != 0.0)
            {     printf ("\n\nLine %d : output [%d] should be 0.0, is %f.\n", __LINE__, k, output [k]) ;
                  exit (1) ;
                  } ;

      /* Make sure that this function has been exported. */
      src_set_ratio (src_state, 1.0) ;

      /* Delete converter. */
      src_state = src_delete (src_state) ;

      puts ("ok") ;
} /* process_reset_test */

/*==============================================================================
*/

typedef struct
{     int channels ;
      long count, total ;
      float *data ;
} TEST_CB_DATA ;

static long
test_callback_func (void *cb_data, float **data)
{     TEST_CB_DATA *pcb_data ;

      long frames ;

      if ((pcb_data = cb_data) == NULL)
            return 0 ;

      if (data == NULL)
            return 0 ;

      if (pcb_data->total - pcb_data->count > 0)
            frames = pcb_data->total - pcb_data->count ;
      else
            frames = 0 ;

      *data = pcb_data->data + pcb_data->count ;
      pcb_data->count += frames ;

      return frames ;
} /* test_callback_func */

static void
callback_reset_test (int converter)
{     static TEST_CB_DATA test_callback_data ;

      static float output [BUFFER_LEN] ;

      SRC_STATE *src_state ;

      double src_ratio = 1.1 ;
      long read_count, read_total ;
      int k, error ;

      printf ("\tcallback_reset_test (%-28s) ....... ", src_get_name (converter)) ;
      fflush (stdout) ;

      for (k = 0 ; k < ARRAY_LEN (data_one) ; k++)
      {     data_one [k] = 1.0 ;
            data_zero [k] = 0.0 ;
            } ;

      if ((src_state = src_callback_new (test_callback_func, converter, 1, &error, &test_callback_data)) == NULL)
      {     printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
            exit (1) ;
            } ;

      /* Process a bunch of 1.0 valued samples. */
      test_callback_data.channels = 1 ;
      test_callback_data.count = 0 ;
      test_callback_data.total = ARRAY_LEN (data_one) ;
      test_callback_data.data = data_one ;

      read_total = 0 ;
      do
      {     read_count = (ARRAY_LEN (output) - read_total > CB_READ_LEN) ? CB_READ_LEN : ARRAY_LEN (output) - read_total ;
            read_count = src_callback_read (src_state, src_ratio, read_count, output + read_total) ;
            read_total += read_count ;
            }
      while (read_count > 0) ;

      /* Check for errors. */
      if ((error = src_error (src_state)) != 0)
      {     printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
            exit (1) ;
            } ;

      /* Reset the state of the converter.*/
      src_reset (src_state) ;

      /* Process a bunch of 0.0 valued samples. */
      test_callback_data.channels = 1 ;
      test_callback_data.count = 0 ;
      test_callback_data.total = ARRAY_LEN (data_zero) ;
      test_callback_data.data = data_zero ;

      /* Now process some zero data. */
      read_total = 0 ;
      do
      {     read_count = (ARRAY_LEN (output) - read_total > CB_READ_LEN) ? CB_READ_LEN : ARRAY_LEN (output) - read_total ;
            read_count = src_callback_read (src_state, src_ratio, read_count, output + read_total) ;
            read_total += read_count ;
            }
      while (read_count > 0) ;

      /* Check for errors. */
      if ((error = src_error (src_state)) != 0)
      {     printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
            exit (1) ;
            } ;

      /* Finally make sure that the output data is zero ie reset was sucessful. */
      for (k = 0 ; k < BUFFER_LEN / 2 ; k++)
            if (output [k] != 0.0)
            {     printf ("\n\nLine %d : output [%d] should be 0.0, is %f.\n\n", __LINE__, k, output [k]) ;
                  save_oct_float ("output.dat", data_one, ARRAY_LEN (data_one), output, ARRAY_LEN (output)) ;
                  exit (1) ;
                  } ;

      /* Make sure that this function has been exported. */
      src_set_ratio (src_state, 1.0) ;

      /* Delete converter. */
      src_state = src_delete (src_state) ;

      puts ("ok") ;
} /* callback_reset_test */



Generated by  Doxygen 1.6.0   Back to index