trngaje
commented
1 month ago unsigned long spu_load_fake_microphone_data(long param_1,char *param_2)
{
FILE *__stream;
ulong uVar1;
size_t sVar2;
void *__ptr;
unsigned long uVar3;
long lVar4;
int local_30;
uint local_2c;
int local_28; // fread로 읽혀지는 버퍼 4byte x 3
int local_24;
int local_20;
int local_18;
undefined4 local_14; // sample rate
short local_a;
long local_8;
//local_8 = ___stack_chk_guard;
__stream = fopen(param_2,"rb");
if (__stream == (FILE *)0x0) {
uVar3 = 0xffffffff;
}
else {
fseek(__stream,0,2); // int fseek(FILE* stream, long int offset, int origin);
uVar1 = ftell(__stream);
fseek(__stream,0,0);
sVar2 = fread(&local_28,4,3,__stream); // size_t fread(void *buffer, size_t size, size_t count, FILE *stream);
if (sVar2 == 3) {
header 정보
// https://crystalcube.co.kr/123
if (local_28 == 0x46464952) { // "RIFF"
if (local_24 == (int)uVar1 + -8) {
if (local_20 == 0x45564157) { // "WAVE"
do {
sVar2 = fread(&local_30,4,2,__stream);
if (sVar2 != 2) {
puts(" ERROR: Incomplete sub-chunk header.");
goto LAB_0007f438;
}
if (local_30 == 0x20746d66) { // "fmt "
if (local_2c != 0x10) {
puts(" ERROR: WAV fmt chunk is incorrectly sized.");
goto LAB_0007f438;
}
sVar2 = fread(&local_18,4,4,__stream);
if (sVar2 != 4) {
puts(" ERROR: Could not read fmt data from WAV file.");
goto LAB_0007f438;
}
if (local_18 != 0x10001) { // audio format (2byte) | numchannels (2byte)
__printf_chk(1," ERROR: WAV must be uncompressed PCM and mono (is %08x).\n");
goto LAB_0007f438;
}
if (local_a != 0x10) { // bit per sample (2byte)
puts(" ERROR: WAV must be 16 bits per sample.");
goto LAB_0007f438;
}
}
else {
if (local_30 == 0x61746164) { "data"
uVar1 = (ulong)local_2c; // Chunk Size
__ptr = malloc(uVar1);
*(void **)(param_1 + 0x40d30) = __ptr;
sVar2 = fread(__ptr,uVar1,1,__stream);
if (sVar2 == 1) {
uVar3 = 0;
*(undefined4 *)(param_1 + 0x40d38) = local_14;
*(uint *)(param_1 + 0x40d3c) = local_2c >> 1;
goto LAB_0007f384;
}
puts(" ERROR: Could not read WAV data.");
free(*(void **)(param_1 + 0x40d30));
*(undefined8 *)(param_1 + 0x40d30) = 0;
goto LAB_0007f438;
}
fseek(__stream,(ulong)local_2c,1);
}
lVar4 = ftell(__stream);
} while (lVar4 < (long)(uVar1 & 0xffffffff));
puts("ERROR: Did not find data subchunk in WAV file.");
}
else {
puts(" ERROR: WAV file does not have correct Format string.");
}
}
else {
__printf_chk(1," ERROR: WAV file does not have correct ChunkSize (%d should be %d)\n");
}
}
else {
puts(" ERROR: WAV file does not have correct ChunkID string.");
}
}
else {
__printf_chk(1," ERROR: Could not read WAV header from %s.\n",param_2);
}
LAB_0007f438:
fclose(__stream);
uVar3 = 0xffffffff;
}
LAB_0007f384:
//if (local_8 == ___stack_chk_guard) {
return uVar3;
}
/* WARNING: Subroutine does not return */
//__stack_chk_fail(uVar3);
}
아래 루틴을 통해 wav 파일의 format을 이해하고 샘플 microphone.wav를 생성한다.