我正在尝试从 iOS 上读取 16 位 16KHz wav（20 秒长）并执行指纹识别。我尝试按照指南“GNSDK-for-Mobile-iOS-Developers-Guide”进行操作，但它在第 53 页（仅 C#）上没有objective-c 示例。我的代码读入整个文件，然后将 2K 块写入函数指纹写入（我也尝试将指针传递给整个文件）。变量“结果”永远不会设置为 1 - 表示已传递的数据不足 - 但 20 秒应该足够了，对吧？有人可以帮忙吗？谢谢。
这就是我所做的：
NSString *filepath = [[NSBundle mainBundle] pathForResource:@"Human.signed.20s.16bit" ofType:@"raw"];
NSData *audioData= [NSData dataWithContentsOfFile:filepath];
BOOL result;
if (error)
NSLog(@"Error reading file: %@", error.localizedDescription);
// for debugging...
NSLog(@"contents: %@", audioData);
NSLog(@"Done:");
unsigned char buffer[audioData.length];
[audioData getBytes:buffer length:audioData.length];
for (int i = 0; i < audioData.length; i++) {
printf("0x%02x ",(unsigned char)buffer[i]);
}
[self.gnMusicIDFileInfo fingerprintBegin:16000 audioSampleSize:16 audioChannels:1 error:&error];
if (error) {
NSLog(@"Error = %@", [error localizedDescription]);
}
int count = 0;
result = 0;
while (result==0 && count<sizeof(buffer)-2048)
{
result = [self.gnMusicIDFileInfo fingerprintWrite:&buffer[count] audioDataSize:2048 error:&error];
NSLog(@"Count = %i",count);
count=count+2048;
}
NSLog(@"result = %i", result);
if (error) {
NSLog(@"Error = %@", [error localizedDescription]);
}
[self.gnMusicIDFileInfo fingerprintEnd:&error];
if (error) {
NSLog(@"Error = %@", [error localizedDescription]);
}
[self.gnMusicIDFileInfo fingerprint:&error];
if (error) {
NSLog(@"Error = %@", [error localizedDescription]);
}