ftdm_channel_sig_read_t 501 src/include/private/ftdm_core.h ftdm_channel_sig_read_t sig_read; ftdm_channel_sig_read_t 334 src/include/private/ftdm_types.h typedef ftdm_status_t (*ftdm_channel_sig_read_t)(ftdm_channel_t *ftdmchan, void *data, ftdm_size_t size);