Configuring ALSA for NONINTERLEAVED access in Jetson TX2

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi ,

In Jetson TX2, I could configure ALSA default audio device for SND_PCM_ACCESS_RW_INTERLEAVED, SND_PCM_STREAM_PLAYBACK mode and audio playback works fine.

But When I try to configure ALSA default audio device for SND_PCM_ACCESS_RW_NONINTERLEAVED, SND_PCM_STREAM_PLAYBACK mode then below error is observed.

(snd_pcm_set_params) Access type not available for PLAYBACK: Invalid argument

Can someone please provide more details , How Jetson TX2’s ALSA to be configured for SND_PCM_ACCESS_RW_NONINTERLEAVED audio buffer playback use case?

Thanks And Regards,
Prabhakaran.

3

Hello!

If you refer to the tegra_pcm_alt.c, you will see that only interleaved is supported and not noninterleaved.

I am interested to know why you need noninterleaved support? For multi-channel audio it is not a common configuration because audio samples are usually interleaved.

Regards,
Jon

5

Hi Jonathan,

Thank you for your response. We had such use case. Now we convert non interleaved data to interleaved data and could play in Jetson TX2. Thank you!!.

~Prabhakaran.