PCM Format Helpers

snd_pcm_format_signed - Check the PCM format is signed linear
snd_pcm_format_unsigned - Check the PCM format is unsigned linear
snd_pcm_format_linear - Check the PCM format is linear
snd_pcm_format_little_endian - Check the PCM format is little-endian
snd_pcm_format_big_endian - Check the PCM format is big-endian
snd_pcm_format_width - return the bit-width of the format
snd_pcm_format_physical_width - return the physical bit-width of the format
snd_pcm_format_size - return the byte size of samples on the given format
snd_pcm_format_silence_64 - return the silent data in 8 bytes array
snd_pcm_format_set_silence - set the silence data on the buffer
snd_pcm_limit_hw_rates - determine rate_min/rate_max fields
snd_pcm_rate_to_rate_bit - converts sample rate to SNDRV_PCM_RATE_xxx bit