unsigned int nr_rates; /* number of rate table entries */
unsigned int *rate_table; /* rate table */
unsigned char clock; /* associated clock */
+ struct snd_pcm_chmap_elem *chmap; /* (optional) channel map */
};
struct snd_usb_substream;
struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
snd_pcm_format_t pcm_format; /* current audio format (for hw_params callback) */
unsigned int channels; /* current number of channels (for hw_params callback) */
+ unsigned int channels_max; /* max channels in the all audiofmts */
unsigned int cur_rate; /* current rate (for hw_params callback) */
unsigned int period_bytes; /* current period bytes (for hw_params callback) */
unsigned int altset_idx; /* USB data format: index of alternate setting */