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freeswitch/libs/voipcodecs/tests/lpc10_tests.c

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/*
* VoIPcodecs - a series of DSP components for telephony
*
* lpc10_tests.c - Test the LPC10 low bit rate speech codec.
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2006 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: lpc10_tests.c,v 1.11 2007/11/10 11:14:58 steveu Exp $
*/
/*! \file */
/*! \page lpc10_tests_page LPC10 codec tests
\section lpc10_tests_page_sec_1 What does it do?
\section lpc10_tests_page_sec_2 How is it used?
To perform a general audio quality test, lpc10 should be run. The file ../localtests/short_nb_voice.wav
will be compressed to LPC10 data, decompressed, and the resulting audio stored in post_lpc10.wav.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <audiofile.h>
#include "voipcodecs.h"
#define BLOCK_LEN 180
#define BLOCKS_PER_READ 1
#define IN_FILE_NAME "../localtests/dam9.wav"
#define REF_FILE_NAME "../localtests/dam9_lpc55.wav"
#define COMPRESS_FILE_NAME "lpc10_out.lpc10"
#define DECOMPRESS_FILE_NAME "lpc10_in.lpc10"
#define OUT_FILE_NAME "post_lpc10.wav"
int main(int argc, char *argv[])
{
AFfilehandle inhandle;
AFfilehandle refhandle;
AFfilehandle outhandle;
AFfilesetup filesetup;
int frames;
int outframes;
float x;
double pre_energy;
double post_energy;
double ref_energy;
double diff_energy;
int16_t pre_amp[BLOCKS_PER_READ*BLOCK_LEN];
int16_t post_amp[BLOCKS_PER_READ*BLOCK_LEN];
int16_t ref_amp[BLOCKS_PER_READ*BLOCK_LEN];
int16_t log_amp[BLOCKS_PER_READ*BLOCK_LEN*3];
uint8_t lpc10_data[BLOCKS_PER_READ*7];
double xx;
lpc10_encode_state_t *lpc10_enc_state;
lpc10_decode_state_t *lpc10_dec_state;
int i;
int block_no;
int log_error;
int compress;
int decompress;
const char *in_file_name;
int compress_file;
int decompress_file;
int len;
compress = FALSE;
decompress = FALSE;
log_error = TRUE;
in_file_name = IN_FILE_NAME;
for (i = 1; i < argc; i++)
{
if (strcmp(argv[i], "-c") == 0)
{
compress = TRUE;
continue;
}
if (strcmp(argv[i], "-d") == 0)
{
decompress = TRUE;
continue;
}
if (strcmp(argv[i], "-i") == 0)
{
in_file_name = argv[++i];
continue;
}
if (strcmp(argv[i], "-l") == 0)
{
log_error = FALSE;
continue;
}
}
compress_file = -1;
decompress_file = -1;
inhandle = AF_NULL_FILEHANDLE;
refhandle = AF_NULL_FILEHANDLE;
outhandle = AF_NULL_FILEHANDLE;
if (!decompress)
{
if ((inhandle = afOpenFile(in_file_name, "r", 0)) == AF_NULL_FILEHANDLE)
{
printf(" Cannot open wave file '%s'\n", in_file_name);
exit(2);
}
if ((x = afGetFrameSize(inhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
{
printf(" Unexpected frame size in wave file '%s'\n", in_file_name);
exit(2);
}
if ((x = afGetRate(inhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
{
printf(" Unexpected sample rate in wave file '%s'\n", in_file_name);
exit(2);
}
if ((x = afGetChannels(inhandle, AF_DEFAULT_TRACK)) != 1.0)
{
printf(" Unexpected number of channels in wave file '%s'\n", in_file_name);
exit(2);
}
if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
{
fprintf(stderr, " Failed to create file setup\n");
exit(2);
}
if ((refhandle = afOpenFile(REF_FILE_NAME, "r", 0)) == AF_NULL_FILEHANDLE)
{
printf(" Cannot open wave file '%s'\n", REF_FILE_NAME);
exit(2);
}
if ((x = afGetFrameSize(refhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
{
printf(" Unexpected frame size in wave file '%s'\n", REF_FILE_NAME);
exit(2);
}
if ((x = afGetRate(refhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
{
printf(" Unexpected sample rate in wave file '%s'\n", REF_FILE_NAME);
exit(2);
}
if ((x = afGetChannels(refhandle, AF_DEFAULT_TRACK)) != 1.0)
{
printf(" Unexpected number of channels in wave file '%s'\n", REF_FILE_NAME);
exit(2);
}
}
else
{
if ((decompress_file = open(DECOMPRESS_FILE_NAME, O_RDONLY)) < 0)
{
fprintf(stderr, " Cannot open decompressed data file '%s'\n", DECOMPRESS_FILE_NAME);
exit(2);
}
}
if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
{
fprintf(stderr, " Failed to create file setup\n");
exit(2);
}
afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
afInitFileFormat(filesetup, AF_FILE_WAVE);
afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
if ((outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup)) == AF_NULL_FILEHANDLE)
{
fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
exit(2);
}
if ((lpc10_enc_state = lpc10_encode_init(NULL, TRUE)) == NULL)
{
fprintf(stderr, " Cannot create encoder\n");
exit(2);
}
if ((lpc10_dec_state = lpc10_decode_init(NULL, TRUE)) == NULL)
{
fprintf(stderr, " Cannot create decoder\n");
exit(2);
}
if (compress)
{
if ((compress_file = open(COMPRESS_FILE_NAME, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0)
{
fprintf(stderr, " Cannot create compressed data file '%s'\n", COMPRESS_FILE_NAME);
exit(2);
}
}
pre_energy = 0.0;
post_energy = 0.0;
ref_energy = 0.0;
diff_energy = 0.0;
if (decompress)
{
while ((len = read(decompress_file, lpc10_data, BLOCKS_PER_READ*7)) > 0)
{
lpc10_decode(lpc10_dec_state, post_amp, lpc10_data, len/7);
outframes = afWriteFrames(outhandle, AF_DEFAULT_TRACK, post_amp, BLOCK_LEN*len/7);
}
}
else
{
block_no = 0;
while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, pre_amp, BLOCKS_PER_READ*BLOCK_LEN)) == BLOCKS_PER_READ*BLOCK_LEN
&&
(frames = afReadFrames(refhandle, AF_DEFAULT_TRACK, ref_amp, BLOCKS_PER_READ*BLOCK_LEN)) == BLOCKS_PER_READ*BLOCK_LEN)
{
lpc10_encode(lpc10_enc_state, lpc10_data, pre_amp, BLOCKS_PER_READ);
if (compress)
write(compress_file, lpc10_data, BLOCKS_PER_READ*7);
lpc10_decode(lpc10_dec_state, post_amp, lpc10_data, BLOCKS_PER_READ);
for (i = 0; i < BLOCK_LEN; i++)
{
pre_energy += (double) pre_amp[i]*(double) pre_amp[i];
post_energy += (double) post_amp[i]*(double) post_amp[i];
ref_energy += (double) ref_amp[i]*(double) ref_amp[i];
/* The reference file has some odd clipping, so eliminate this from the
energy measurement. */
if (ref_amp[i] == 32767 || ref_amp[i] == -32768)
xx = 0.0;
else
xx = post_amp[i] - ref_amp[i];
diff_energy += (double) xx*(double) xx;
log_amp[i] = xx;
}
block_no++;
if (log_error)
outframes = afWriteFrames(outhandle, AF_DEFAULT_TRACK, log_amp, frames);
else
outframes = afWriteFrames(outhandle, AF_DEFAULT_TRACK, post_amp, frames);
}
if (afCloseFile(inhandle) != 0)
{
printf(" Cannot close wave file '%s'\n", in_file_name);
exit(2);
}
if (afCloseFile(refhandle) != 0)
{
printf(" Cannot close wave file '%s'\n", REF_FILE_NAME);
exit(2);
}
}
if (afCloseFile(outhandle) != 0)
{
printf(" Cannot close wave file '%s'\n", OUT_FILE_NAME);
exit(2);
}
afFreeFileSetup(filesetup);
if (compress)
close(compress_file);
if (decompress)
close(decompress_file);
lpc10_encode_release(lpc10_enc_state);
lpc10_decode_release(lpc10_dec_state);
if (!decompress)
{
printf("Output energy is %f%% of input energy.\n", 100.0*post_energy/pre_energy);
printf("Difference energy is %f%% of the total.\n", 100.0*diff_energy/ref_energy);
if (fabs(1.0 - post_energy/pre_energy) > 0.05
||
fabs(diff_energy/post_energy) > 0.03)
{
printf("Tests failed.\n");
exit(2);
}
printf("Tests passed.\n");
}
return 0;
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/
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