回复： how to implement an MP3 sink element
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Thank you! Actually we already started to do as what you proposed. Before we implemented an audio sink derived from GstAudioSink already, now I'm try to seek a better solution to revise our old audio sink, you know, which had a ring buffer, to support MP3. Best regards, Dale ----- 原始邮件 ---- 发件人： "Zheng, Huan" <[hidden email]> 收件人： Discussion of the development of GStreamer <[hidden email]> 已发送： 2008/10/8(周三), 上午11:37:13 主题： Re: [gst-devel] how to implement an MP3 sink element My idea is to derive from Gstbasesink And this derived sink will do the following thing: 1, mp3 decode 2, pcm rendering 3, provide Gstclock And there are several plugins that you will need to reference correspondingly: 1, mad plugin 2, alsasink plugin 3, Gstbaseaudiosink And this derived sink will depend on the following libraries: 1, mad decode library 2, id3tag library 3, libasound
Inside the render function of this derived sink, you will need to combine the chain function of mad plugin with ALSA pcm rendering functions.
What I have done is that I have integrated ALSA pcm rendering into the render function of the derived sink, and let this sink provide a GstClock. So that this derived the sink could now directly play out raw pcm data. Usage is: filesrc location=rawpcm ! mysink I’m not going to add mp3 decode into the render function, because my scenario is hardware decoding, what I’m going to do is to add mp3 frame parsing into the render function, and print out frame information for each frame.
Any suggestions are appreciated!
Best Regards, Zheng, Huan(ZBT) OTC/SSD/SSG Intel Aisa-Pacific Research & Developement Ltd Tel: 021-6116 6435 Inet: 8821 6435 Cub: 3W035 From:
Dale Tian [mailto:[hidden email]]
Is there anyone has
implemented an MP3 sink or some decoder+sink element, or have any ideas about
that? Now I'm try to design such a sink.
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Re: 回复： how to implement an MP3 sink element
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Hi,
Tian Actually,
after replying your mail, I just can’t help and have implemented a Mp3 sink as
what I proposed. And It works. It
works like: gst-launch filesrc location=xx.mp3 ! mysink But
I haven’t try any Seek operations because currently I don’t have a player which
could use mysink. Best Regards, Zheng,
Huan(ZBT) OTC/SSD/SSG Intel Aisa-Pacific
Research & Developement Ltd Tel: 021-6116 6435 Inet: 8821 6435 Cub: 3W035 From:
Dale Tian [mailto:[hidden email]] Thank you!
Actually we already started to do as what you proposed. Before we
implemented an audio sink derived from GstAudioSink already, now I'm try to
seek a better solution to revise our old audio sink, you know, which had a ring
buffer, to support MP3. ----- 原始邮件 ---- My
idea is to derive from Gstbasesink And
this derived sink will do the following thing: 1, mp3 decode 2, pcm rendering
3, provide Gstclock And
there are several plugins that you will need to reference correspondingly: 1,
mad plugin 2, alsasink plugin 3, Gstbaseaudiosink And
this derived sink will depend on the following libraries: 1, mad decode library
2, id3tag library 3, libasound Inside
the render function of this derived
sink, you will need to combine the chain function of mad plugin with ALSA pcm rendering functions. What
I have done is that I have integrated ALSA pcm rendering into the render function of the derived
sink, and let this sink provide a GstClock. So that this derived the sink could
now directly play out raw pcm data. Usage is: filesrc location=rawpcm ! mysink I’m
not going to add mp3 decode into the render function, because my scenario is
hardware decoding, what I’m going to do is to add mp3 frame parsing into the
render function, and print out frame information for each frame. Any
suggestions are appreciated! Best Regards, Zheng,
Huan(ZBT) OTC/SSD/SSG Intel Aisa-Pacific
Research & Developement Ltd Tel: 021-6116 6435 Inet: 8821 6435 Cub: 3W035 From:
Dale Tian [mailto:[hidden email]] Is there anyone has
implemented an MP3 sink or some decoder+sink element, or have any ideas about
that? Now I'm try to design such a sink. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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