我想在我的流媒體應用上實現AudioFileStreamSeek功能。但是我無法實現這一點。即使馬特·加拉格爾在他的博客中說:在iPhone上,我該如何使用fileHandle來即時下載mp3文件?
Icidentally,該AudioFileStreamSeek功能似乎完全破碎。如果你無法正常工作(就像我不能),只需要在文件中尋找一個新點,設置不連續爲真,並讓AudioFileStream處理它。
我的代碼kindda看起來是這樣,但我不能得到它的工作:
NSString *path = [[NSString alloc] initWithContentsOfURL: url];
NSLog(@"url = %@", path);
SInt64 currentOffset;
UInt32 flags = 0;
OSStatus status = AudioFileStreamSeek(audioFileStream, 150, ¤tOffset, &flags);
NSLog(@"Setting next byte offset to: %qi, flags: %d", (long long)currentOffset, flags);
NSFileHandle *fileHandle = [NSFileHandle fileHandleForReadingAtPath: path];
// then read data from the new offset set by AudioFileStreamSeek
[fileHandle seekToFileOffset:currentOffset];
NSData * data = [fileHandle readDataOfLength:4096];
NSLog(@"data length %d, bytes %d", [data length], [data bytes]);
if (discontinuous)
{
err = AudioFileStreamParseBytes(audioFileStream, length, bytes, kAudioFileStreamParseFlag_Discontinuity);
if (err)
{
[self failWithErrorCode:AS_FILE_STREAM_PARSE_BYTES_FAILED];
return;
}
}
else
{
err = AudioFileStreamParseBytes(audioFileStream, length, bytes, 0);
if (err)
{
[self failWithErrorCode:AS_FILE_STREAM_PARSE_BYTES_FAILED];
return;
}
}
請幫助...
所以在iPhone上的流媒體應用尋求功能是不可能的? – RoundOutTooSoon 2009-08-28 21:41:40