audioqueue

How to get array of float audio data from AudioQueueRef in iOS?

由 天大地大妈咪最大 提交于 2019-11-28 19:40:41
I'm working on getting audio into the iPhone in a form where I can pass it to a (C++) analysis algorithm. There are, of course, many options: the AudioQueue tutorial at trailsinthesand gets things started. The audio callback, though, gives an AudioQueueRef , and I'm finding Apple's documentation thin on this side of things. Built-in methods to write to a file, but nothing where you actually peer inside the packets to see the data. I need data. I don't want to write anything to a file, which is what all the tutorials — and even Apple's convenience I/O objects — seem to be aiming at. Apple's

AudioQueue how to find out playback length of queued data

由 99封情书 提交于 2019-11-28 06:35:58
问题 I am using AudioQueue to stream some song, my question is how can i tell the length of playback of already queued buffers? I want to stream two seconds of data at a time, the problem i am having is how do i know how many bytes actually correspond to two seconds of music (so i can always be ahead by two seconds). Thanks Daniel 回答1: Here is a class that uses Audio File Services to get at bitrate / packet / frame data to grab the amount of bytes from a music file that correspond to x seconds,

How to get array of float audio data from AudioQueueRef in iOS?

由 安稳与你 提交于 2019-11-27 12:27:53
问题 I'm working on getting audio into the iPhone in a form where I can pass it to a (C++) analysis algorithm. There are, of course, many options: the AudioQueue tutorial at trailsinthesand gets things started. The audio callback, though, gives an AudioQueueRef , and I'm finding Apple's documentation thin on this side of things. Built-in methods to write to a file, but nothing where you actually peer inside the packets to see the data. I need data. I don't want to write anything to a file, which
订阅 audioqueue