Re: How to perform fast forward/rewind with AudioQueue
Re: How to perform fast forward/rewind with AudioQueue
- Subject: Re: How to perform fast forward/rewind with AudioQueue
- From: "Xu Ting" <email@hidden>
- Date: Thu, 2 Oct 2008 17:50:52 +0900
Hi, Craig,
I think with your help, I had figured out how to perform fast forward and rewind, but I still have some questions about some details.
Q1. When I specify a packet index to be read, should I clean the buffer? If so, how should I do? I had tried free buffer and refill the buffer from the packet index, but it did not work correctly.
Q2. After I clicked the fast forward button or rewind button, I found out that the AudioQueueGetCurrentTime doesn't work as I expected. How should I get the correct time? Should I calculate the time by current packet index? If so, I can not get the correct packet index which is currently playing. How should I get the correct packet index?
Thank you!
- Tonny
--
Life is like a box of chocolates, u never know what u'r gonna get.
On Wed, Oct 1, 2008 at 2:28 AM, Craig Hopson
<email@hidden> wrote:
Hi Tonny,
Check this list again looking for:
Subject = "Re: Audio playback at a specific position?
-Craig
On Sep 30, 2008, at 5:45 AM, Xu Ting wrote:
Hi, guys,
I am a newbie to digital audio programming and completely have no idea on how to use Audio Queue, With the XCode documentations, I had implemented play, pause, stop with Audio Queue, but now I have to implement the fast forward/rewind with Audio Queue APIs, can anybody tell me how to do it?
I had searched Google and this mailing list, but I cannot find any correct solution for fast forward/rewind.
Here is what I am gonna do:
a. I have a CAF file, and a meta-data file which indicate the start time and the end time of each pieces in the CAF file.
b. When user press a play button, I need to play the CAF file.[I had it done.]
c. When user press a pause button, I need to pause the CAF file.[it also had been done.]
d. When user press a fast forward button, I need to play the CAF at the time which is specified by the meta-data file, untill the file reaches the end.
e. When user press a rewind button, I need to play to the previous time specified by the meta-data.
Now, how can I implement it?
Thanks in advance.
Tonny Xu
--
Life is like a box of chocolates, u never know what u'r gonna get.
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