pcm: fix default capture start threshold
Eric Laurent authored
Default start threshold was set to the same value (half of the buffer size)
for playback and capture in pcm_open(). The normal default value for capture
should be 1 frame.

Change-Id: I05afd51ada3d915a6dde7c97846e1693f7c575f4
ff2e5429
tinyalsa: a small library to interface with ALSA in the Linux kernel

The aims are:

- Provide a basic pcm and mixer API
- If it's not absolutely needed, don't add it to the API
- Avoid supporting complex and unnecessary operations that could be
  dealt with at a higher level