Hi,
In my external io type plugin, the alsa buffer is not accessible in the transfer function, symptom of this is I am unable to memcpy period size data from alsa buffer to my local buffers.
after debugging a little I found out that values of offset, size and areas->step are wrong.
#aplay --period-size =1024 --buffer-size=8192 test.wav
static snd_pcm_sframes_t alsa_transfer(snd_pcm_ioplug_t *io, const snd_pcm_channel_area_t *areas, snd_pcm_uframes_t offset, snd_pcm_uframes_t size)
I get following,
Buffer size = 32768 bytes Period size = 4096 bytes *ALSA buffer base addr = 0x2c6e0 //wrong Offset = 0xbeb4c7dc **//wrong* *size = 1063777280 **//wrong* step = 32
What could be the reason? -Pharaoh.