266 lines
7.8 KiB
C
266 lines
7.8 KiB
C
/*
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* SpanDSP - a series of DSP components for telephony
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*
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* lpc10_tests.c - Test the LPC10 low bit rate speech codec.
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*
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* Written by Steve Underwood <steveu@coppice.org>
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*
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* Copyright (C) 2006 Steve Underwood
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id: lpc10_tests.c,v 1.24 2009/05/30 15:23:14 steveu Exp $
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*/
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/*! \file */
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/*! \page lpc10_tests_page LPC10 codec tests
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\section lpc10_tests_page_sec_1 What does it do?
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\section lpc10_tests_page_sec_2 How is it used?
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To perform a general audio quality test, lpc10 should be run. The file ../test-data/local/short_nb_voice.wav
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will be compressed to LPC10 data, decompressed, and the resulting audio stored in post_lpc10.wav.
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*/
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#if defined(HAVE_CONFIG_H)
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <assert.h>
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#include <ctype.h>
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#include <sndfile.h>
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//#if defined(WITH_SPANDSP_INTERNALS)
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#define SPANDSP_EXPOSE_INTERNAL_STRUCTURES
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//#endif
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#include "spandsp.h"
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#include "spandsp-sim.h"
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#define BLOCK_LEN 180
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#define BLOCKS_PER_READ 5
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#define IN_FILE_NAME "../test-data/local/dam9.wav"
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#define REF_FILE_NAME "../test-data/local/dam9_lpc55.wav"
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#define COMPRESS_FILE_NAME "lpc10_out.lpc10"
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#define DECOMPRESS_FILE_NAME "lpc10_in.lpc10"
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#define OUT_FILE_NAME "post_lpc10.wav"
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int main(int argc, char *argv[])
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{
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SNDFILE *inhandle;
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SNDFILE *refhandle;
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SNDFILE *outhandle;
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int frames;
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int outframes;
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double pre_energy;
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double post_energy;
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double ref_energy;
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double diff_energy;
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int16_t pre_amp[BLOCKS_PER_READ*BLOCK_LEN];
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int16_t post_amp[BLOCKS_PER_READ*BLOCK_LEN];
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int16_t ref_amp[BLOCKS_PER_READ*BLOCK_LEN];
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int16_t log_amp[BLOCKS_PER_READ*BLOCK_LEN*3];
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uint8_t lpc10_data[BLOCKS_PER_READ*7];
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double xx;
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lpc10_encode_state_t *lpc10_enc_state;
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lpc10_decode_state_t *lpc10_dec_state;
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int i;
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int block_no;
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int log_error;
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int compress;
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int decompress;
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const char *in_file_name;
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int compress_file;
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int decompress_file;
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int len;
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int opt;
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int enc_len;
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int dec_len;
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compress = FALSE;
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decompress = FALSE;
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log_error = TRUE;
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in_file_name = IN_FILE_NAME;
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while ((opt = getopt(argc, argv, "cdi:l")) != -1)
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{
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switch (opt)
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{
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case 'c':
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compress = TRUE;
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break;
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case 'd':
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decompress = TRUE;
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break;
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case 'i':
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in_file_name = optarg;
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break;
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case 'l':
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log_error = FALSE;
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break;
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default:
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//usage();
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exit(2);
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}
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}
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compress_file = -1;
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decompress_file = -1;
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inhandle = NULL;
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refhandle = NULL;
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outhandle = NULL;
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if (!decompress)
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{
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if ((inhandle = sf_open_telephony_read(in_file_name, 1)) == NULL)
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{
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fprintf(stderr, " Cannot open audio file '%s'\n", in_file_name);
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exit(2);
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}
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if ((refhandle = sf_open_telephony_read(REF_FILE_NAME, 1)) == NULL)
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{
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fprintf(stderr, " Cannot open audio file '%s'\n", REF_FILE_NAME);
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exit(2);
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}
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}
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else
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{
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if ((decompress_file = open(DECOMPRESS_FILE_NAME, O_RDONLY)) < 0)
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{
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fprintf(stderr, " Cannot open decompressed data file '%s'\n", DECOMPRESS_FILE_NAME);
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exit(2);
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}
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}
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if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME, 1)) == NULL)
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{
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fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME);
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exit(2);
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}
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if ((lpc10_enc_state = lpc10_encode_init(NULL, TRUE)) == NULL)
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{
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fprintf(stderr, " Cannot create encoder\n");
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exit(2);
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}
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if ((lpc10_dec_state = lpc10_decode_init(NULL, TRUE)) == NULL)
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{
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fprintf(stderr, " Cannot create decoder\n");
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exit(2);
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}
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if (compress)
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{
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if ((compress_file = open(COMPRESS_FILE_NAME, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0)
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{
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fprintf(stderr, " Cannot create compressed data file '%s'\n", COMPRESS_FILE_NAME);
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exit(2);
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}
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}
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pre_energy = 0.0;
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post_energy = 0.0;
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ref_energy = 0.0;
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diff_energy = 0.0;
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if (decompress)
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{
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while ((len = read(decompress_file, lpc10_data, BLOCKS_PER_READ*7)) > 0)
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{
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lpc10_decode(lpc10_dec_state, post_amp, lpc10_data, len/7);
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outframes = sf_writef_short(outhandle, post_amp, BLOCK_LEN*len/7);
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}
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}
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else
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{
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block_no = 0;
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while ((frames = sf_readf_short(inhandle, pre_amp, BLOCKS_PER_READ*BLOCK_LEN)) == BLOCKS_PER_READ*BLOCK_LEN
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&&
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(frames = sf_readf_short(refhandle, ref_amp, BLOCKS_PER_READ*BLOCK_LEN)) == BLOCKS_PER_READ*BLOCK_LEN)
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{
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enc_len = lpc10_encode(lpc10_enc_state, lpc10_data, pre_amp, BLOCKS_PER_READ*BLOCK_LEN);
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if (compress)
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write(compress_file, lpc10_data, enc_len);
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dec_len = lpc10_decode(lpc10_dec_state, post_amp, lpc10_data, enc_len);
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for (i = 0; i < dec_len; i++)
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{
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pre_energy += (double) pre_amp[i]*(double) pre_amp[i];
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post_energy += (double) post_amp[i]*(double) post_amp[i];
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ref_energy += (double) ref_amp[i]*(double) ref_amp[i];
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/* The reference file has some odd clipping, so eliminate this from the
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energy measurement. */
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if (ref_amp[i] == 32767 || ref_amp[i] == -32768)
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xx = 0.0;
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else
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xx = post_amp[i] - ref_amp[i];
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diff_energy += (double) xx*(double) xx;
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log_amp[i] = xx;
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}
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block_no++;
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if (log_error)
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outframes = sf_writef_short(outhandle, log_amp, dec_len);
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else
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outframes = sf_writef_short(outhandle, post_amp, dec_len);
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}
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if (sf_close(inhandle) != 0)
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{
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fprintf(stderr, " Cannot close audio file '%s'\n", in_file_name);
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exit(2);
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}
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if (sf_close(refhandle) != 0)
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{
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fprintf(stderr, " Cannot close audio file '%s'\n", REF_FILE_NAME);
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exit(2);
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}
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}
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if (sf_close(outhandle) != 0)
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{
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fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_NAME);
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exit(2);
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}
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if (compress)
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close(compress_file);
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if (decompress)
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close(decompress_file);
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lpc10_encode_release(lpc10_enc_state);
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lpc10_decode_release(lpc10_dec_state);
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if (!decompress)
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{
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printf("Output energy is %f%% of input energy.\n", 100.0*post_energy/pre_energy);
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printf("Difference energy is %f%% of the total.\n", 100.0*diff_energy/ref_energy);
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if (fabs(1.0 - post_energy/pre_energy) > 0.05
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fabs(diff_energy/post_energy) > 0.03)
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{
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printf("Tests failed.\n");
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exit(2);
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}
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printf("Tests passed.\n");
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}
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return 0;
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}
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/*- End of function --------------------------------------------------------*/
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/*- End of file ------------------------------------------------------------*/
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