289 lines
5.1 KiB
C
289 lines
5.1 KiB
C
/*
|
|
* Copyright (C) 2004 Christopher John Purnell
|
|
* cjp@lost.org.uk
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <ansidecl.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <sys/mman.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <AL/alut.h>
|
|
|
|
#if __BYTE_ORDER == __LITTLE_ENDIAN
|
|
|
|
#define WAV_RIFF 0x46464952
|
|
#define WAV_WAVE 0x45564157
|
|
#define WAV_fmt 0x20746D66
|
|
#define WAV_data 0x61746164
|
|
#define WAV_smpl 0x6C706D73
|
|
|
|
#define swap16le(D) (D)
|
|
#define swap32le(D) (D)
|
|
|
|
#elif __BYTE_ORDER == __BIG_ENDIAN
|
|
|
|
#define WAV_RIFF 0x52494646
|
|
#define WAV_WAVE 0x57415645
|
|
#define WAV_fmt 0x666D7420
|
|
#define WAV_data 0x64617461
|
|
#define WAV_smpl 0x736D706C
|
|
|
|
#define swap16le(D) (((D)<<8) | ((D)>>8))
|
|
#define swap32le(D) ((((D)<<24) | (((D)<<8)&0x00FF0000) | (((D)>>8)&0x0000FF00) | ((D)>>24)))
|
|
|
|
#else
|
|
#error "Unknown endian"
|
|
#endif
|
|
|
|
typedef struct
|
|
{
|
|
u_int32_t id;
|
|
u_int32_t size;
|
|
u_int32_t type;
|
|
u_int32_t *data;
|
|
u_int32_t len;
|
|
}
|
|
AL_wav_file;
|
|
|
|
typedef struct
|
|
{
|
|
u_int32_t id;
|
|
u_int32_t size;
|
|
u_int32_t *data;
|
|
}
|
|
AL_wav_chunk;
|
|
|
|
static ALboolean _alutReadWavHeader(AL_wav_file *file, u_int32_t *memory)
|
|
{
|
|
if ((file->id = *(memory++)) != WAV_RIFF)
|
|
{
|
|
return AL_FALSE;
|
|
}
|
|
|
|
file->size = swap32le(*(memory++));
|
|
|
|
if (file->size < 4)
|
|
{
|
|
return AL_FALSE;
|
|
}
|
|
|
|
if ((file->type = *(memory++)) != WAV_WAVE)
|
|
{
|
|
return AL_FALSE;
|
|
}
|
|
|
|
file->data = memory;
|
|
file->len = (file->size - 1) >> 2;
|
|
|
|
return AL_TRUE;
|
|
}
|
|
|
|
static ALboolean _alutReadWavChunk(AL_wav_file *file, AL_wav_chunk *chunk)
|
|
{
|
|
ALuint len;
|
|
|
|
if (file->len < 2)
|
|
{
|
|
return AL_FALSE;
|
|
}
|
|
|
|
chunk->id = file->data[0];
|
|
chunk->size = swap32le(file->data[1]);
|
|
|
|
len = (chunk->size + 11) >> 2;
|
|
|
|
if (file->len < len)
|
|
{
|
|
return AL_FALSE;
|
|
}
|
|
|
|
chunk->data = file->data + 2;
|
|
|
|
file->data += len;
|
|
file->len -= len;
|
|
|
|
return AL_TRUE;
|
|
}
|
|
|
|
ALvoid alutLoadWAVMemory(ALbyte *memory, ALenum *format, ALvoid **data,
|
|
ALsizei *size, ALsizei *freq, ALboolean *loop)
|
|
{
|
|
AL_wav_file file;
|
|
AL_wav_chunk chunk;
|
|
ALuint bits = 0;
|
|
|
|
*data = 0;
|
|
*size = 0;
|
|
*freq = 0;
|
|
*format = 0;
|
|
*loop = 0;
|
|
|
|
if (!_alutReadWavHeader(&file, (u_int32_t *)memory))
|
|
{
|
|
return;
|
|
}
|
|
|
|
while (_alutReadWavChunk(&file, &chunk))
|
|
{
|
|
u_int16_t *data16 = (u_int16_t *)chunk.data;
|
|
|
|
switch (chunk.id)
|
|
{
|
|
case WAV_fmt:
|
|
if (data16[0] != 1)
|
|
{
|
|
return;
|
|
}
|
|
|
|
bits = swap16le(data16[7]);
|
|
*freq = swap32le(chunk.data[1]);
|
|
|
|
switch (swap16le(data16[1]))
|
|
{
|
|
case 1:
|
|
switch (bits)
|
|
{
|
|
case 8:
|
|
*format = AL_FORMAT_MONO8;
|
|
break;
|
|
case 16:
|
|
*format = AL_FORMAT_MONO16;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
break;
|
|
case 2:
|
|
switch (bits)
|
|
{
|
|
case 8:
|
|
*format = AL_FORMAT_STEREO8;
|
|
break;
|
|
case 16:
|
|
*format = AL_FORMAT_STEREO16;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
break;
|
|
case WAV_data:
|
|
if (!bits)
|
|
{
|
|
return;
|
|
}
|
|
|
|
*data = malloc(chunk.size);
|
|
*size = chunk.size;
|
|
|
|
#if __BYTE_ORDER == __LITTLE_ENDIAN
|
|
memcpy(*data, chunk.data, chunk.size);
|
|
#else
|
|
if (bits == 16)
|
|
{
|
|
u_int16_t *ptr = *data;
|
|
ALuint i, s = chunk.size << 1;
|
|
|
|
for (i = 0; i < s; i++)
|
|
{
|
|
ptr[i] = swap16le(data16[i]);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
memcpy(*data, chunk.data, chunk.size);
|
|
}
|
|
#endif
|
|
break;
|
|
case WAV_smpl:
|
|
*loop = swap32le(chunk.data[7]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
ALvoid alutLoadWAVFile(ALbyte *file, ALenum *format, ALvoid **data,
|
|
ALsizei *size, ALsizei *freq, ALboolean *loop)
|
|
{
|
|
int fd;
|
|
void *memory;
|
|
struct stat st;
|
|
|
|
if ((fd = open(file, O_RDONLY)) < 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (!fstat(fd, &st))
|
|
{
|
|
memory = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
|
|
if (memory != MAP_FAILED)
|
|
{
|
|
alutLoadWAVMemory(memory, format, data,
|
|
size, freq, loop);
|
|
munmap(memory, st.st_size);
|
|
}
|
|
}
|
|
|
|
close(fd);
|
|
}
|
|
|
|
ALboolean alutLoadWAV(const char *fname, ALvoid **wave, ALsizei *format, ALsizei *size, ALsizei *bits, ALsizei *freq )
|
|
{
|
|
ALboolean loop;
|
|
|
|
alutLoadWAVFile((ALubyte *)fname, format, wave, size, freq, &loop);
|
|
|
|
if (! *wave)
|
|
{
|
|
return AL_FALSE;
|
|
}
|
|
|
|
switch (*format)
|
|
{
|
|
case AL_FORMAT_MONO8:
|
|
case AL_FORMAT_STEREO8:
|
|
*bits = 8;
|
|
break;
|
|
case AL_FORMAT_MONO16:
|
|
case AL_FORMAT_STEREO16:
|
|
*bits = 16;
|
|
break;
|
|
}
|
|
|
|
return AL_TRUE;
|
|
}
|
|
|
|
ALvoid alutUnloadWAV(ALenum format ATTRIBUTE_UNUSED, ALvoid *data,
|
|
ALsizei size ATTRIBUTE_UNUSED,
|
|
ALsizei freq ATTRIBUTE_UNUSED)
|
|
{
|
|
if (data)
|
|
{
|
|
free(data);
|
|
}
|
|
}
|