Mercurial > hg > audiostuff
view spandsp-0.0.3/spandsp-0.0.3/tests/time_scale_tests.c @ 5:f762bf195c4b
import spandsp-0.0.3
author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
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date | Fri, 25 Jun 2010 16:00:21 +0200 |
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/* * SpanDSP - a series of DSP components for telephony * * time_scale_tests.c * * Written by Steve Underwood <steveu@coppice.org> * * Copyright (C) 2004 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: time_scale_tests.c,v 1.14 2006/11/19 14:07:27 steveu Exp $ */ /*! \page time_scale_tests_page Time scaling tests \section time_scale_tests_page_sec_1 What does it do? These tests run a speech file through the time scaling routines. \section time_scale_tests_page_sec_2 How are the tests run? These tests process a speech file called pre_time_scale.wav. This file should contain 8000 sample/second 16 bits/sample linear audio. The tests read this file, change the time scale of its contents, and write the resulting audio to post_time_scale.wav. This file also contains 8000 sample/second 16 bits/sample linear audio. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <stdio.h> #include <inttypes.h> #include <stdlib.h> #include <string.h> #if defined(HAVE_TGMATH_H) #include <tgmath.h> #endif #if defined(HAVE_MATH_H) #include <math.h> #endif #include <audiofile.h> #include <tiffio.h> #include "spandsp.h" #define BLOCK_LEN 160 #define IN_FILE_NAME "../localtests/short_nb_voice.wav" #define OUT_FILE_NAME "post_time_scaling.wav" int main(int argc, char *argv[]) { AFfilehandle inhandle; AFfilehandle outhandle; AFfilesetup filesetup; int frames; int new_frames; int out_frames; int count; time_scale_t state; float x; float rate; int16_t in[BLOCK_LEN]; int16_t out[5*BLOCK_LEN]; 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); } 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); } rate = 1.8; time_scale_init(&state, rate); count = 0; while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, in, BLOCK_LEN))) { new_frames = time_scale(&state, out, in, frames); out_frames = afWriteFrames(outhandle, AF_DEFAULT_TRACK, out, new_frames); if (out_frames != new_frames) { fprintf(stderr, " Error writing wave file\n"); exit(2); } if (++count > 100) { if (rate > 0.5) { rate -= 0.1; if (rate >= 0.99 && rate <= 1.01) rate -= 0.1; printf("Rate is %f\n", rate); time_scale_init(&state, rate); } count = 0; } } if (afCloseFile(inhandle) != 0) { printf(" Cannot close wave file '%s'\n", IN_FILE_NAME); exit(2); } if (afCloseFile(outhandle) != 0) { printf(" Cannot close wave file '%s'\n", OUT_FILE_NAME); exit(2); } afFreeFileSetup(filesetup); return 0; } /*- End of function --------------------------------------------------------*/ /*- End of file ------------------------------------------------------------*/