[DMIX Plugin] Issue in using Different bindings for same Alsa card

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I have two virtual device pointing to same Alsa card ,with different bindings

When audio played on both device [dmix_4_channels and dmix_2_channels] in parallel. Audio played on dmix_2_channels is getting corrupted.

 

Validated with alsa version : 1.2.3

 

Please let me know how to make it work with below configuration.

 

Alsa configuration used for testing:

*************************************************

pcm.dmix_4_channels {

        type dmix

        ipc_key 5678293

        ipc_perm 0660

        ipc_gid audio

        bindings [0 1 2 3]

 

        slave {

                pcm "hardware"

                channels 4

                periods  4

                period_time 40000

        }

}

 

pcm.dmix_2_channels {

        type dmix

        ipc_key 5678293

        ipc_perm 0660

        ipc_gid audio

        bindings [0 1]

 

        slave {

                pcm "hardware"

                channels 2

                periods  4

                period_time 40000

        }

}

 

pcm.hardware {

        type hw

        card 0

        channels 4

        rate 48000

        format S16_LE

}

 

*************************************************

 

Best regards

Palaniswamy Vijay

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