119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
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/*
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Audio File Library
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Copyright 2000, Silicon Graphics, Inc.
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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 as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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sixteen-to-eight.c
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This program tests the conversion from 16-bit integers to 8-bit
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integers.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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#include <audiofile.h>
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#include "TestUtilities.h"
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int main (int argc, char **argv)
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{
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AFfilehandle file;
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AFfilesetup setup;
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int16_t frames16[] = {14298, 392, 3923, -683, 958, -1921};
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int8_t frames8[] = {55, 1, 15, -3, 3, -8};
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int i, frameCount = 6;
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int8_t byte;
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AFframecount result;
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setup = afNewFileSetup();
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afInitFileFormat(setup, AF_FILE_WAVE);
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afInitSampleFormat(setup, AF_DEFAULT_TRACK, AF_SAMPFMT_UNSIGNED, 8);
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afInitChannels(setup, AF_DEFAULT_TRACK, 1);
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char testFileName[PATH_MAX];
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if (!createTemporaryFile("sixteen-to-eight", testFileName))
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{
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fprintf(stderr, "Could not create temporary file.\n");
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exit(EXIT_FAILURE);
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}
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file = afOpenFile(testFileName, "w", setup);
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if (file == AF_NULL_FILEHANDLE)
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{
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fprintf(stderr, "could not open file for writing\n");
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exit(EXIT_FAILURE);
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}
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afFreeFileSetup(setup);
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afSetVirtualSampleFormat(file, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
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afWriteFrames(file, AF_DEFAULT_TRACK, frames16, frameCount);
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afCloseFile(file);
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file = afOpenFile(testFileName, "r", AF_NULL_FILESETUP);
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if (file == AF_NULL_FILEHANDLE)
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{
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fprintf(stderr, "could not open file for reading\n");
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exit(EXIT_FAILURE);
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}
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afSetVirtualSampleFormat(file, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 8);
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for (i=0; i<frameCount; i++)
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{
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/* Read one frame. */
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result = afReadFrames(file, AF_DEFAULT_TRACK, &byte, 1);
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if (result != 1)
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break;
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/* Compare the byte read with its precalculated value. */
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if (memcmp(&byte, &frames8[i], 1) != 0)
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{
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printf("error\n");
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printf("expected %d, got %d\n", frames8[i], byte);
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exit(EXIT_FAILURE);
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}
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else
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{
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#ifdef DEBUG
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printf("got what was expected: %d\n", byte);
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#endif
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}
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}
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afCloseFile(file);
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unlink(testFileName);
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exit(EXIT_SUCCESS);
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}
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