/*-
* Copyright (c) 2008 Ariff Abdullah <ariff@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <sysexits.h>
#include "pcm.h"
#include "waveutil.h"
#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
#endif
int
wave_header_read(struct wave_info *w)
{
uint32_t sz;
size_t readsz;
uint8_t buf[64];
if (w->fp == NULL) {
warnx("%s(): no stream assigned", __func__);
return (EIO);
}
w->format = WAVE_FORMAT_UNKNOWN;
w->bit = 0;
w->channels = 0;
w->rate = 0;
w->endian = WAVE_UNKNOWN_ENDIAN;
w->header_size = 0;
w->data_size = 0;
w->seekable = (ftell(w->fp) == -1) ? 0 : 1;
for (;;) {
readsz = fread(buf, 1, 8, w->fp);
if (readsz != 8) {
warnx("%s(): io error [1]", __func__);
return (EIO);
}
sz = WAVE_READ_32(w, buf + 4);
w->header_size += 8;
switch (WAVE_MAGIC_READ(buf)) {
case WAVE_MAGIC_RIFX:
w->endian = WAVE_BIG_ENDIAN;
case WAVE_MAGIC_RIFF:
if (w->endian == WAVE_UNKNOWN_ENDIAN)
w->endian = WAVE_LITTLE_ENDIAN;
readsz = fread(buf, 1, 4, w->fp);
if (readsz != 4) {
warnx("%s(): io error [2]", __func__);
return (EIO);
}
if (WAVE_MAGIC_READ(buf) != WAVE_MAGIC_WAVE) {
warnx("%s(): not a WAVE file", __func__);
return (EFTYPE);
}
w->header_size += 4;
break;
case WAVE_MAGIC_FMT:
if (!(sz == 16 || sz == 18 || sz == 40)) {
warnx("%s(): illegal header size=%u",
__func__, sz);
return (EFTYPE);
}
readsz = fread(buf, 1, sz, w->fp);
if (readsz != (size_t)sz) {
warnx("%s(): io error [3]", __func__);
return (EIO);
}
w->format = WAVE_READ_16(w, buf);
switch (w->format) {
case WAVE_FORMAT_PCM:
case WAVE_FORMAT_ALAW:
case WAVE_FORMAT_ULAW:
case WAVE_FORMAT_EXT:
break;
default:
warnx("%s(): unsupported format 0x%04x",
__func__, w->format);
return (EFTYPE);
break;
}
w->channels = WAVE_READ_16(w, buf + 2);
w->rate = WAVE_READ_32(w, buf + 4);
w->bit = WAVE_READ_16(w, buf + 14);
w->header_size += sz;
break;
case WAVE_MAGIC_DATA:
w->data_size = sz;
return (0);
break;
default:
if (w->header_size == 8) {
warnx("%s(): not a RIFF file", __func__);
return (EFTYPE);
}
while (sz > 0) {
readsz = fread(buf, 1, min(sz, sizeof(buf)),
w->fp);
if (readsz < 1) {
warnx("%s(): io error [4]", __func__);
return (EIO);
}
w->header_size += readsz;
sz -= readsz;
}
break;
}
}
/* NOTREACHED */
return (0);
}
int
wave_header_write(struct wave_info *w)
{
long pos;
ssize_t total;
int ext;
uint8_t buf[4];
if (w->fp == NULL) {
warnx("%s(): no stream assigned", __func__);
return (EIO);
}
if (!((w->format == WAVE_FORMAT_PCM ||
w->format == WAVE_FORMAT_EXT ||
w->format == WAVE_FORMAT_ULAW ||
w->format == WAVE_FORMAT_ALAW) &&
(w->endian == WAVE_LITTLE_ENDIAN ||
w->endian == WAVE_BIG_ENDIAN))) {
warnx("%s(): format=0x%08x endian=%u unknown",
__func__, w->format, w->endian);
return (EFTYPE);
}
if (w->format == WAVE_FORMAT_EXT)
ext = 24;
else if (w->format == WAVE_FORMAT_ULAW ||
w->format == WAVE_FORMAT_ALAW)
ext = 2;
else
ext = 0;
if (w->seekable != 0) {
if ((pos = ftell(w->fp)) == -1 ||
fseek(w->fp, 0L, SEEK_SET) == -1)
return (EIO);
pos -= WAVE_HEADER_SIZE + ext + ((ext != 0) ? 12 : 0);
if (w->data_size != (uint32_t)pos)
warnx("%s(): WARNING data_size=%u != pos=%u",
__func__, w->data_size, (uint32_t)pos);
}
if (w->endian == WAVE_LITTLE_ENDIAN)
WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_RIFF);
else
WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_RIFX);
total = fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_32(w, buf, w->data_size + WAVE_HEADER_SIZE + ext +
(!(w->format == WAVE_FORMAT_PCM || w->format == WAVE_FORMAT_EXT) ?
12 : 0) - 8);
total += fwrite(buf, 1, 4, w->fp);
WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_WAVE);
total += fwrite(buf, 1, 4, w->fp);
WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_FMT);
total += fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_32(w, buf, 16 + ext);
total += fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_16(w, buf, w->format);
total += fwrite(buf, 1, 2, w->fp);
WAVE_WRITE_16(w, buf, w->channels);
total += fwrite(buf, 1, 2, w->fp);
WAVE_WRITE_32(w, buf, w->rate);
total += fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_32(w, buf, w->rate * WAVE_BLOCK_ALIGN(w));
total += fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_16(w, buf, WAVE_BLOCK_ALIGN(w));
total += fwrite(buf, 1, 2, w->fp);
WAVE_WRITE_16(w, buf, w->bit);
total += fwrite(buf, 1, 2, w->fp);
if (ext == 2) {
WAVE_WRITE_16(w, buf, 0);
total += fwrite(buf, 1, 2, w->fp);
} else if (ext == 24) {
WAVE_WRITE_16(w, buf, 22);
total += fwrite(buf, 1, 2, w->fp);
WAVE_WRITE_16(w, buf, w->bit);
total += fwrite(buf, 1, 2, w->fp);
WAVE_WRITE_32(w, buf, 0);
total += fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_16(w, buf, WAVE_FORMAT_PCM);
total += fwrite(buf, 1, 2, w->fp);
total += fwrite("\x00\x00\x00\x00\x10\x00\x80\x00"
"\x00\xAA\x00\x38\x9B\x71", 1, 14, w->fp);
}
if (ext != 0) {
WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_FACT);
total += fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_32(w, buf, 4);
total += fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_32(w, buf,
w->data_size / WAVE_BLOCK_ALIGN(w));
total += fwrite(buf, 1, 4, w->fp);
ext += 12;
}
WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_DATA);
total += fwrite(buf, 1, 4, w->fp);
WAVE_WRITE_32(w, buf, w->data_size);
total += fwrite(buf, 1, 4, w->fp);
if (total != (WAVE_HEADER_SIZE + ext)) {
warnx("%s(): WARNING: header write size=%zu != %u",
__func__, total, WAVE_HEADER_SIZE + ext);
return (EIO);
}
return (0);
}