--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.3/spandsp-0.0.3/tests/lpc10_tests.c	Fri Jun 25 16:00:21 2010 +0200
@@ -0,0 +1,316 @@
+/*
+ * SpanDSP - 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 1.10 2006/11/20 13:58:57 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 <inttypes.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#if defined(HAVE_TGMATH_H)
+#include <tgmath.h>
+#endif
+#if defined(HAVE_MATH_H)
+#include <math.h>
+#endif
+#include <assert.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <audiofile.h>
+#include <tiffio.h>
+
+#include "spandsp.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 ------------------------------------------------------------*/