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neotools: code fixup & vgz support

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a dinosaur
2023-12-10 10:37:15 +11:00
parent 9c5e19264b
commit 353d4e5def
4 changed files with 87 additions and 57 deletions
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73
neotools/neoadpcmextract.c
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@@ -1,57 +1,58 @@
/* neoadpcmextract.c (C) 2017, 2019, 2020 a dinosaur (zlib) */
/* neoadpcmextract.c (C) 2017, 2019, 2020, 2023 a dinosaur (zlib) */
#include "neoadpcmextract.h"
#include "endian.h"
#include <stdlib.h>
int vgmReadSample(FILE* fin, Buffer* buf)
static uint32_t read32le(nfile* fin)
{
// Get sample data length.
uint32_t sampLen = 0;
fread(&sampLen, sizeof(uint32_t), 1, fin);
if (sampLen < sizeof(uint64_t))
return 1;
sampLen -= sizeof(uint64_t);
uint32_t tmp = 0;
nread(&tmp, sizeof(uint32_t), 1, fin);
return SWAP_LE32(tmp);
}
// Resize buffer if needed.
buf->size = sampLen;
if (!buf->data || buf->reserved < sampLen)
bool bufferResize(Buffer* buf, size_t size)
{
if (!buf)
return false;
buf->size = size;
if (!buf->data || buf->reserved < size)
{
free(buf->data);
buf->reserved = sampLen;
buf->data = malloc(sampLen);
buf->reserved = size;
buf->data = malloc(size);
if (!buf->data)
return 1;
return false;
}
return true;
}
// Ignore 8 bytes.
uint64_t dummy;
fread(&dummy, sizeof(uint64_t), 1, fin);
// Read adpcm data.
fread(buf->data, sizeof(uint8_t), sampLen, fin);
int vgmReadSample(nfile* restrict fin, Buffer* restrict buf)
{
// Get sample data length
uint32_t sampLen = read32le(fin);
if (sampLen <= 8) return 1;
sampLen -= 8;
if (!bufferResize(buf, sampLen)) return false; // Resize buffer if needed
nseek(fin, 8, SEEK_CUR); // Ignore 8 bytes
nread(buf->data, sizeof(uint8_t), sampLen, fin); // Read adpcm data
return 0;
}
int vgmScanSample(FILE* file)
int vgmScanSample(nfile* file)
{
// Scan for pcm headers.
// Scan for pcm headers
while (1)
{
if (feof(file) || ferror(file))
return 0;
// Patterns to match (in hex):
// 67 66 82 - ADPCM-A
// 67 66 83 - ADPCM-B
if (fgetc(file) != 0x67 || fgetc(file) != 0x66)
continue;
uint8_t byte = fgetc(file);
if (byte == 0x82)
return 'A';
else if (byte == 0x83)
return 'B';
if (neof(file) || nerror(file)) return 0;
if (ngetc(file) != 0x67 || ngetc(file) != 0x66) continue; // Match data block
switch (ngetc(file))
{
case 0x82: return 'A'; // 67 66 82 - ADPCM-A
case 0x83: return 'B'; // 67 66 83 - ADPCM-B
default: return 0;
}
}
}