[alsa-devel] Question about snd_dma_buffer bytes field

Does

(substream->dma_buffer.bytes) need to equal (snd_pcm_lib_period_bytes(substream) * runtime->periods) ?

When this is not true, it seems like the buffer is not being filled correctly.

for testing, this works .buffer_bytes_max = 16 * 7 * 512, .period_bytes_min = 32, .period_bytes_max = 7 * 512, /* This is size of ping + pong buffer*/

and this doesn't. .buffer_bytes_max = 16 * 7 * 512 + 512, .period_bytes_min = 32, .period_bytes_max = 7 * 512, /* This is size of ping + pong buffer*/

When playing back a sine wave, I can hear breaks.

Thanks Troy