static void
name_test (int converter)
{ int k ;
puts (" name_test :") ;
for (k = 0 ; k <= converter ; k++)
{ printf ("\tName %d : %s\n", k, src_get_name (k)) ;
printf ("\tDesc %d : %s\n", k, src_get_description (k)) ;
} ;
puts ("") ;
return ;
} /* name_test */
static void
name_test (void)
{ const char *name ;
int k = 0 ;
puts (" name_test :") ;
while (1)
{ name = src_get_name (k) ;
if (name == NULL)
break ;
printf ("\tName %d : %s\n", k, name) ;
printf ("\tDesc %d : %s\n", k, src_get_description (k)) ;
k ++ ;
} ;
puts ("") ;
return ;
} /* name_test */
PJ_DEF(pj_status_t) pjmedia_resample_create( pj_pool_t *pool,
pj_bool_t high_quality,
pj_bool_t large_filter,
unsigned channel_count,
unsigned rate_in,
unsigned rate_out,
unsigned samples_per_frame,
pjmedia_resample **p_resample)
{
pjmedia_resample *resample;
int type, err;
PJ_ASSERT_RETURN(pool && p_resample && rate_in &&
rate_out && samples_per_frame, PJ_EINVAL);
resample = PJ_POOL_ZALLOC_T(pool, pjmedia_resample);
PJ_ASSERT_RETURN(resample, PJ_ENOMEM);
/* Select conversion type */
if (high_quality) {
type = large_filter ? SRC_SINC_BEST_QUALITY : SRC_SINC_MEDIUM_QUALITY;
} else {
type = large_filter ? SRC_SINC_FASTEST : SRC_LINEAR;
}
/* Create converter */
resample->state = src_new(type, channel_count, &err);
if (resample->state == NULL) {
PJ_LOG(4,(THIS_FILE, "Error creating resample: %s",
src_strerror(err)));
return PJMEDIA_ERROR;
}
/* Calculate ratio */
resample->ratio = rate_out * 1.0 / rate_in;
/* Calculate number of samples for input and output */
resample->in_samples = samples_per_frame;
resample->out_samples = rate_out / (rate_in / samples_per_frame);
resample->frame_in = (float*)
pj_pool_calloc(pool,
resample->in_samples + 8,
sizeof(float));
resample->frame_out = (float*)
pj_pool_calloc(pool,
resample->out_samples + 8,
sizeof(float));
/* Set the converter ratio */
err = src_set_ratio(resample->state, resample->ratio);
if (err != 0) {
PJ_LOG(4,(THIS_FILE, "Error creating resample: %s",
src_strerror(err)));
return PJMEDIA_ERROR;
}
/* Done */
PJ_LOG(5,(THIS_FILE,
"Resample using libsamplerate %s, type=%s (%s), "
"ch=%d, in/out rate=%d/%d",
src_get_version(),
src_get_name(type), src_get_description(type),
channel_count, rate_in, rate_out));
*p_resample = resample;
return PJ_SUCCESS;
}
int
main (int argc, char *argv [])
{ CONVERTER_TEST snr_test_data [] =
{
{ SRC_ZERO_ORDER_HOLD,
7,
BOOLEAN_FALSE,
{ { 1, { 0.01111111111 }, 3.0, 1, 36.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 37.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 37.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 38.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 14.0, 1.0 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 32.0, 1.0 },
{ 1, { 0.3511111111 }, 1.33, 1, 10.0, 1.0 }
}
},
{ SRC_LINEAR,
7,
BOOLEAN_FALSE,
{ { 1, { 0.01111111111 }, 3.0, 1, 73.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 74.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 74.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 77.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 97.0, 0.94 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 60.0, 0.95 },
{ 1, { 0.3511111111 }, 1.33, 1, 22.0, 0.99 }
}
},
{ SRC_SINC_FASTEST,
8,
BOOLEAN_TRUE,
{ { 1, { 0.01111111111 }, 3.0, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 100.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 97.0, 1.0 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 100.0, 0.5 },
{ 2, { 0.011111, 0.45 }, 0.6, 1, 97.0, 0.5 },
{ 1, { 0.3511111111 }, 1.33, 1, 97.0, 1.0 }
}
},
{ SRC_SINC_MEDIUM_QUALITY,
8,
BOOLEAN_TRUE,
{ { 1, { 0.01111111111 }, 3.0, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 100.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 97.0, 1.0 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 100.0, 0.5 },
{ 2, { 0.011111, 0.45 }, 0.6, 1, 97.0, 0.5 },
{ 1, { 0.43111111111 }, 1.33, 1, 97.0, 1.0 }
}
},
{ SRC_SINC_BEST_QUALITY,
8,
BOOLEAN_TRUE,
{ { 1, { 0.01111111111 }, 3.0, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 100.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 97.0, 1.0 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 100.0, 0.5 },
{ 2, { 0.011111, 0.45 }, 0.6, 1, 97.0, 0.5 },
{ 1, { 0.47111111111 }, 1.33, 1, 97.0, 1.0 }
},
},
} ; /* snr_test_data */
double best_snr, snr, freq3dB, conversion_rate, worst_conv_rate ;
int j, k, converter, verbose = 0 ;
/* Force output of the Electric Fence banner message. */
force_efence_banner () ;
if (argc == 2 && strcmp (argv [1], "--verbose") == 0)
verbose = 1 ;
puts ("") ;
for (j = 0 ; j < ARRAY_LEN (snr_test_data) ; j++)
{ best_snr = 5000.0 ;
worst_conv_rate = 1e200 ;
converter = snr_test_data [j].converter ;
printf (" Converter %d : %s\n", converter, src_get_name (converter)) ;
printf (" %s\n", src_get_description (converter)) ;
for (k = 0 ; k < snr_test_data [j].tests ; k++)
{ snr = snr_test (&(snr_test_data [j].test_data [k]), k, converter, verbose, &conversion_rate) ;
if (best_snr > snr)
best_snr = snr ;
if (worst_conv_rate > conversion_rate)
worst_conv_rate = conversion_rate ;
} ;
printf (" Worst case Signal-to-Noise Ratio : %.2f dB.\n", best_snr) ;
printf (" Worst case conversion rate : %.0f samples/sec.\n", worst_conv_rate) ;
if (snr_test_data [j].do_bandwidth_test == BOOLEAN_FALSE)
{ puts (" Bandwith test not performed on this converter.\n") ;
continue ;
}
freq3dB = bandwidth_test (converter, verbose) ;
printf (" Measured -3dB rolloff point : %5.2f %%.\n\n", freq3dB) ;
} ;
return 0 ;
} /* main */
int
main (int argc, char *argv [])
{ CONVERTER_TEST snr_test_data [] =
{
{ SRC_ZERO_ORDER_HOLD,
8,
BOOLEAN_FALSE,
{ { 1, { 0.01111111111 }, 3.0, 1, 28.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 36.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 36.0, 1.0 },
{ 1, { 0.01111111111 }, 1.0, 1, 150.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 38.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 14.0, .96 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 12.0, .96 },
{ 1, { 0.3511111111 }, 1.33, 1, 10.0, 1.0 }
}
},
{ SRC_LINEAR,
8,
BOOLEAN_FALSE,
{ { 1, { 0.01111111111 }, 3.0, 1, 73.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 73.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 73.0, 1.0 },
{ 1, { 0.01111111111 }, 1.0, 1, 150.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 77.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 16.0, 0.96 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 26.0, 0.96 },
{ 1, { 0.3511111111 }, 1.33, 1, 14.4, 0.99 }
}
},
{ SRC_SINC_FASTEST,
9,
BOOLEAN_TRUE,
{ { 1, { 0.01111111111 }, 3.0, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 99.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 100.0, 1.0 },
{ 1, { 0.01111111111 }, 1.0, 1, 150.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 100.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 97.0, 1.0 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 100.0, 0.5 },
{ 2, { 0.011111, 0.45 }, 0.6, 1, 97.0, 0.5 },
{ 1, { 0.3511111111 }, 1.33, 1, 97.0, 1.0 }
}
},
{ SRC_SINC_MEDIUM_QUALITY,
9,
BOOLEAN_TRUE,
{ { 1, { 0.01111111111 }, 3.0, 1, 130.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 132.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 138.0, 1.0 },
{ 1, { 0.01111111111 }, 1.0, 1, 155.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 134.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 127.0, 1.0 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 124.0, 0.5 },
{ 2, { 0.011111, 0.45 }, 0.6, 1, 126.0, 0.5 },
{ 1, { 0.43111111111 }, 1.33, 1, 121.0, 1.0 }
}
},
{ SRC_SINC_BEST_QUALITY,
9,
BOOLEAN_TRUE,
{ { 1, { 0.01111111111 }, 3.0, 1, 147.0, 1.0 },
{ 1, { 0.01111111111 }, 0.6, 1, 147.0, 1.0 },
{ 1, { 0.01111111111 }, 0.3, 1, 147.0, 1.0 },
{ 1, { 0.01111111111 }, 1.0, 1, 155.0, 1.0 },
{ 1, { 0.01111111111 }, 1.001, 1, 147.0, 1.0 },
{ 2, { 0.011111, 0.324 }, 1.9999, 2, 147.0, 1.0 },
{ 2, { 0.012345, 0.457 }, 0.456789, 1, 148.0, 0.5 },
{ 2, { 0.011111, 0.45 }, 0.6, 1, 149.0, 0.5 },
{ 1, { 0.43111111111 }, 1.33, 1, 145.0, 1.0 }
}
},
} ; /* snr_test_data */
double best_snr, snr, freq3dB ;
int j, k, converter, verbose = 0 ;
if (argc == 2 && strcmp (argv [1], "--verbose") == 0)
verbose = 1 ;
puts ("") ;
for (j = 0 ; j < ARRAY_LEN (snr_test_data) ; j++)
{ best_snr = 5000.0 ;
converter = snr_test_data [j].converter ;
printf (" Converter %d : %s\n", converter, src_get_name (converter)) ;
printf (" %s\n", src_get_description (converter)) ;
for (k = 0 ; k < snr_test_data [j].tests ; k++)
{ snr = snr_test (&(snr_test_data [j].test_data [k]), k, converter, verbose) ;
if (best_snr > snr)
best_snr = snr ;
} ;
printf (" Worst case Signal-to-Noise Ratio : %.2f dB.\n", best_snr) ;
if (snr_test_data [j].do_bandwidth_test == BOOLEAN_FALSE)
{ puts (" Bandwith test not performed on this converter.\n") ;
continue ;
}
freq3dB = bandwidth_test (converter, verbose) ;
printf (" Measured -3dB rolloff point : %5.2f %%.\n\n", freq3dB) ;
} ;
return 0 ;
} /* main */