ALSA Version and Up gradation

Shylesh S

Hi,

I see that my PC with Ubuntu 12.04 OS has "Advanced Linux Sound Architecture Driver Version k3.11.0-26-generic" as it's ALSA Version and "version 1.0.25" as it's ALSA Library version. I use Vayu EVM J6 board booted using GLSDK 7.03, which has it's ALSA Library version as "version 1.0.27". I find difficulties in playing audio in both PLAYBACK and CAPTURE cases. Getting the period size after setting, always returns ZERO, irrespective of the Period Size that is set.

1. Are there any ways to upgrade the ALSA Version in my PC?? (from 1.0.25 to 1.0.27)

2. Does ALSA has dependency on ARM Architecture? (When GLSDK 6.04 works fine in the same J6 Board, Why not GLSDK 7.03?)

3. How to find out the period size to make GLSDK 7.03 booted up Vayu EVM J6 to work good for ALSA?

4. Will the different version of ALSA Libraries in two devices, result in loss of Synchronization? (I use PC- J6 combination to implement gPTP Synchronization. i.e., Master and Slave)

Kindly help me out with these.

Thanks,

Shylesh S.

over 9 years ago

0 Pavel Botev over 9 years ago

TI__Guru**** 170625 points

Hi Shylesh,

1. I think you can upgrade, but you will need to ask in Ubuntu and/or ALSA forums, as this is regarding your host PC, not DRA7x board.

2. From what I can find, GLSDK 7.03 is tested on DRA7x EVM and works fine, with the below conditions/limitations:

Audio - Primary sound card only supports 44.1kHz. Other sample rates require SRC before passing to ALSA pcm device

Refer to the below wiki pages for more info:

processors.wiki.ti.com/.../DRA7xx_GLSDK_7.03.00.03_Data_Sheet
processors.wiki.ti.com/.../DRA7xx_GLSDK_7.03.00.03_Release_Notes
processors.wiki.ti.com/.../DRA7xx_GLSDK_Software_Developers_Guide
processors.wiki.ti.com/.../Linux_Core_Audio_User's_Guide

3. ALSA period size must be aligned with the FIFO depth. The DRA7x EVM is tested with Period size - 64.

See also if the below e2e thread will be in help:
e2e.ti.com/.../443431

Regards,
Pavel

0 Shylesh S over 9 years ago in reply to Pavel Botev

Intellectual 755 points

Hi Pavel,
Thanks a lot for your reply. When I downloaded the ALSA Lib 1.0.27 Tar file that is compatible with GLSDK 7.03, compiled it and copied the SO Files (libasound.so, libasound.so.2) into the arm-gnueabi-gcc compiler inside my PC(/usr/arm-gnueabi-gcc/lib/), the problem was solved. My GLSDK 7.03 on EVM J6 was able to play well. This is for your kind information and for the benefit of other users with the similar problem.

Now I am facing an other issue. I have upgraded my GLSDK Package from 6.04 to 7.03. When I used gst-launch command previously to play a video from file, the video used to play fine with audio. But now, only the Audio works and the video doesn't.
I see that the gstreamer version was v0.10 in GLSDK 6.04 and now, in GLSDK 7.03 it is v1.0.
How do I make it work proplerly?? Is it because of the version change or, whether is it because of the source video file that I use? Is it because, GLSDK 7.03 doesn't support this video format?
Note: I use (.mpg) file format for video.

Please help me in solving this issue.

Thanks in advance,
Shylesh S

0 Pavel Botev over 9 years ago in reply to Shylesh S

TI__Guru**** 170625 points

Hi Shylesh,

From what I was able to find, MPEG-2 and MPEG-4 are supported:

processors.wiki.ti.com/.../DRA7xx_GLSDK_7.03.00.03_Data_Sheet
processors.wiki.ti.com/.../DRA7xx_GLSDK_Software_Developers_Guide
processors.wiki.ti.com/.../DRA7xx_GLSDK_Software_Developers_Guide

e2e.ti.com/.../424187
e2e.ti.com/.../254016
e2e.ti.com/.../160487

Regards,
Pavel

0 Shylesh S over 9 years ago in reply to Pavel Botev

Intellectual 755 points

Hi Pavel,

Thanks a lot for your reply.
Can you please guide me in making gstreamer work on GLSDK 7.03? I am new to this and I feel some difficulties.

I use this command "gst-launch-1.0 filesrc location=sample.mpg ! mpegtsdemux name=dmux dmux. ! queue ! h264parse ! ducatih264dec ! kmssink connector=12 dmux. ! queue ! faad ! alsasink" where sample.mpg is the input file. But I get this error "WARNING: erroneous pipeline: no element "mpegtsdemux" ".

How should I check if any sample video is working fine with my J6 EVM Board? Kindly help me out in this issue.

Thanks in Advance,
Shylesh S.

0 Pavel Botev over 9 years ago in reply to Shylesh S

TI__Guru**** 170625 points

Shylesh,

We move away from the subject of this thread, which is "ALSA Version and Up gradation". Your Gstreamer questions are not related to ALSA. Thus I will recommend you to open new e2e thread with the correct subject.

Regards,
Pavel

0 Shylesh S over 9 years ago in reply to Pavel Botev

Intellectual 755 points

Pavel,

Thanks a lot for your guidance.
I did make a new thread for the GStreamer issue.

Thanks a lot.
Shylesh S.

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ALSA Version and Up gradation