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termination_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 <math.h>

#include <samplerate.h>

#include "util.h"

#define     SHORT_BUFFER_LEN  2048
#define     LONG_BUFFER_LEN         ((1 << 16) - 20)

static void stream_test (int converter, double ratio) ;
static void init_term_test (int converter, double ratio) ;

static int  next_block_length (int reset) ;

int
main (void)
{     static double src_ratios [] =
      {     0.999900, 1.000100, 0.789012, 1.200000, 0.333333, 3.100000,
            0.125000, 8.000000, 0.099900, 9.990000, 0.100000, 10.00000
      } ;

      int k ;

      puts ("\n    Zero Order Hold interpolator:") ;

      for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
            init_term_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ;
      puts ("") ;
      for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
            stream_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ;


      puts ("\n    Linear interpolator:") ;
      for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
            init_term_test (SRC_LINEAR, src_ratios [k]) ;
      puts ("") ;
      for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
            stream_test (SRC_LINEAR, src_ratios [k]) ;


      puts ("\n    Sinc interpolator:") ;
      for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
            init_term_test (SRC_SINC_FASTEST, src_ratios [k]) ;
      puts ("") ;
      for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
            stream_test (SRC_SINC_FASTEST, src_ratios [k]) ;

      puts ("") ;

      return 0 ;
} /* main */

static void
init_term_test (int converter, double src_ratio)
{     static float input [SHORT_BUFFER_LEN], output [SHORT_BUFFER_LEN] ;

      SRC_DATA    src_data ;

      int k, input_len, output_len, error, terminate ;

      printf ("\tinit_term_test   (SRC ratio = %7.4f) .......... ", src_ratio) ;
      fflush (stdout) ;

      /* Calculate maximun input and output lengths. */
      if (src_ratio >= 1.0)
      {     output_len = SHORT_BUFFER_LEN ;
            input_len = (int) floor (SHORT_BUFFER_LEN / src_ratio) ;
            }
      else
      {     input_len = SHORT_BUFFER_LEN ;
            output_len = (int) floor (SHORT_BUFFER_LEN * src_ratio) ;
            } ;

      /* Reduce input_len by 10 so output is longer than necessary. */
      input_len -= 10 ;

      for (k = 0 ; k < ARRAY_LEN (input) ; k++)
            input [k] = 1.0 ;

      if (output_len > SHORT_BUFFER_LEN)
      {     printf ("\n\nLine %d : output_len > SHORT_BUFFER_LEN\n\n", __LINE__) ;
            exit (1) ;
            } ;

      src_data.data_in = input ;
      src_data.input_frames = input_len ;

      src_data.src_ratio = src_ratio ;

      src_data.data_out = output ;
      src_data.output_frames = SHORT_BUFFER_LEN ;

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

      terminate = (int) ceil ((src_ratio >= 1.0) ? 1 : 1.0 / src_ratio) ;

      if (fabs (src_ratio * input_len - src_data.output_frames_gen) > terminate)
      {     printf ("\n\nLine %d : Bad output frame count.\n\n", __LINE__) ;
            printf ("\tterminate             : %d\n", terminate) ;
            printf ("\tsrc_ratio             : %.4f\n", src_ratio) ;
            printf ("\tinput_len             : %d\n"
                        "\tinput_len * src_ratio : %f\n", input_len, input_len * src_ratio) ;
            printf ("\toutput_frames_gen     : %ld\n\n", src_data.output_frames_gen) ;
            exit (1) ;
            } ;

      if (src_data.input_frames_used != input_len)
      {     printf ("\n\nLine %d : input_frames_used should be %d, is %ld.\n\n",
                               __LINE__, input_len, src_data.input_frames_used) ;
            printf ("\tsrc_ratio  : %.4f\n", src_ratio) ;
            printf ("\tinput_len  : %d\n\tinput_used : %ld\n\n", input_len, src_data.input_frames_used) ;
            exit (1) ;
            } ;

      if (fabs (output [0]) < 0.1)
      {     printf ("\n\nLine %d : First output sample is bad.\n\n", __LINE__) ;
            printf ("\toutput [0] == %f\n\n", output [0]) ;
            exit (1) ;
            }

      puts ("ok") ;

      return ;
} /* init_term_test */

static void
stream_test (int converter, double src_ratio)
{     static float input [LONG_BUFFER_LEN], output [LONG_BUFFER_LEN] ;

      SRC_STATE   *src_state ;
      SRC_DATA    src_data ;

      int input_len, output_len, current_in, current_out ;
      int k, error, terminate ;

      printf ("\tstream_test      (SRC ratio = %7.4f) .......... ", src_ratio) ;
      fflush (stdout) ;

/* Erik */
for (k = 0 ; k < LONG_BUFFER_LEN ; k++) input [k] = k * 1.0 ;

      /* Calculate maximun input and output lengths. */
      if (src_ratio >= 1.0)
      {     output_len = LONG_BUFFER_LEN ;
            input_len = (int) floor (LONG_BUFFER_LEN / src_ratio) ;
            }
      else
      {     input_len = LONG_BUFFER_LEN ;
            output_len = (int) floor (LONG_BUFFER_LEN * src_ratio) ;
            } ;

      /* Reduce input_len by 10 so output is longer than necessary. */
      input_len -= 20 ;

      if (output_len > LONG_BUFFER_LEN)
      {     printf ("\n\nLine %d : output_len > LONG_BUFFER_LEN\n\n", __LINE__) ;
            exit (1) ;
            } ;

      current_in = current_out = 0 ;

      /* Perform sample rate conversion. */
      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) ;
            } ;

      src_data.end_of_input = 0 ; /* Set this later. */

      src_data.data_in = input ;

      src_data.src_ratio = src_ratio ;

      src_data.data_out = output ;
      src_data.output_frames = ARRAY_LEN (output) / 10 ;

      terminate = 1 + (int) ceil ((src_ratio >= 1.0) ? src_ratio : 1.0 / src_ratio) ;

      while (1)
      {
            src_data.input_frames = next_block_length (0) ;
            src_data.input_frames = MIN (src_data.input_frames, input_len - current_in) ;

            src_data.output_frames = ARRAY_LEN (output) - current_out ;
            /*-Erik MIN (src_data.output_frames, output_len - current_out) ;-*/

            src_data.end_of_input = (current_in >= input_len) ? 1 : 0 ;

            if ((error = src_process (src_state, &src_data)))
            {     printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
                  printf ("  src_data.input_frames  : %ld\n", src_data.input_frames) ;
                  printf ("  src_data.output_frames : %ld\n\n", src_data.output_frames) ;
                  exit (1) ;
                  } ;

            if (src_data.end_of_input && src_data.output_frames_gen == 0)
                  break ;

            if (src_data.input_frames_used > src_data.input_frames)
            {     printf ("\n\nLine %d : input_frames_used > input_frames\n\n", __LINE__) ;
                  printf ("  src_data.input_frames      : %ld\n", src_data.input_frames) ;
                  printf ("  src_data.input_frames_used : %ld\n", src_data.input_frames_used) ;
                  printf ("  src_data.output_frames     : %ld\n", src_data.output_frames) ;
                  printf ("  src_data.output_frames_gen : %ld\n\n", src_data.output_frames_gen) ;
                  exit (1) ;
                  } ;

            if (src_data.input_frames_used < 0)
            {     printf ("\n\nLine %d : input_frames_used (%ld) < 0\n\n", __LINE__, src_data.input_frames_used) ;
                  exit (1) ;
                  } ;

            if (src_data.output_frames_gen < 0)
            {     printf ("\n\nLine %d : output_frames_gen (%ld) < 0\n\n", __LINE__, src_data.output_frames_gen) ;
                  exit (1) ;
                  } ;

            current_in  += src_data.input_frames_used ;
            current_out += src_data.output_frames_gen ;

            if (current_in > input_len + terminate)
            {     printf ("\n\nLine %d : current_in (%d) > input_len (%d + %d)\n\n", __LINE__, current_in, input_len, terminate) ;
                  exit (1) ;
                  } ;

            if (current_out > output_len)
            {     printf ("\n\nLine %d : current_out (%d) > output_len (%d)\n\n", __LINE__, current_out, output_len) ;
                  exit (1) ;
                  } ;

            if (src_data.input_frames_used > input_len)
            {     printf ("\n\nLine %d : input_frames_used (%ld) > %d\n\n", __LINE__, src_data.input_frames_used, input_len) ;
                  exit (1) ;
                  } ;

            if (src_data.output_frames_gen > output_len)
            {     printf ("\n\nLine %d : output_frames_gen (%ld) > %d\n\n", __LINE__, src_data.output_frames_gen, output_len) ;
                  exit (1) ;
                  } ;

            if (src_data.data_in == NULL && src_data.output_frames_gen == 0)
                  break ;


            src_data.data_in  += src_data.input_frames_used ;
            src_data.data_out += src_data.output_frames_gen ;
            } ;

      src_state = src_delete (src_state) ;

      if (fabs (current_out - src_ratio * input_len) > terminate)
      {     printf ("\n\nLine %d : bad output data length %d should be %2.1f +/- %d.\n", __LINE__,
                              current_out, src_ratio * input_len, terminate) ;
            printf ("\tsrc_ratio  : %.4f\n", src_ratio) ;
            printf ("\tinput_len  : %d\n\tinput_used : %d\n", input_len, current_in) ;
            printf ("\toutput_len : %d\n\toutput_gen : %d\n\n", output_len, current_out) ;
            exit (1) ;
            } ;

      if (current_in != input_len)
      {     printf ("\n\nLine %d : unused input.\n", __LINE__) ;
            printf ("\tinput_len         : %d\n", input_len) ;
            printf ("\tinput_frames_used : %d\n\n", current_in) ;
            exit (1) ;
            } ;

      puts ("ok") ;

      return ;
} /* stream_test */

static int
next_block_length (int reset)
{     static int block_lengths [] = /* Should be an odd length. */
      {     /*-2, 500, 5, 400, 10, 300, 20, 200, 50, 100, 70 -*/
            5, 400, 10, 300, 20, 200, 50, 100, 70
            } ;
      static int block_len_index = 0 ;

      if (reset)
            block_len_index = 0 ;
      else
            block_len_index = (block_len_index + 1) % ARRAY_LEN (block_lengths) ;

      return block_lengths [block_len_index] ;
} /* next_block_length */


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