Hi, Thanks for your immediate reply. My hardware supports MP3 decoding in HW (in addition to few others). I am looking to write a driver such that when an MP3 file is played, the file is decoded using the HW decoder and played. Is there a possibility in current ALSA framework to do so? Thanks, Harsha. On Mon, Feb 25, 2008 at 5:33 PM, Takashi Iwai <tiwai@xxxxxxx> wrote: > At Mon, 25 Feb 2008 12:27:00 +0530, > Harsha priya gupta wrote: > > > > Hi, > > > > I am new to ALSA and audio stack in Linux. I have a sound card that can > do > > HW decoding as well. I am looking at writing an ALSA driver such that > > whatever may be the player or MMF above, it should use the HW decoder > and > > not the inherit SW decoder that is available with the player. > > > > Can someone help me with some pointers or existing like-drivers? > > Which format is in mind? In theoery, you can implement the h/w > decoder on the ALSA framework, but there are some restrictions: > > - ALSA PCM assumes the constant bitrate > - The format bit must be defined > - The specific app recognizes and supports that format > > In the case of AC3 or DTS, it's embedded in SPDIF frames so the PCM > core stuff doesn't take care of the above. But, in the case of native > (non-PCM) formats, the support can be difficult as is. > > > Takashi > -- -Harsha -- -Harsha _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
