Here are the data structures with brief descriptions:

Cambe_decoder	AMBE decoder state
Cambe_raw_params	AMBE encoded frame raw parameters
Cambe_subframe	AMBE subframe parameters
Cambe_synth	AMBE synthesizer state
Cchan_desc
Cgmr1_codec	Structure for GMR1 codec state
Cgmr1_fcch_burst
Cgmr1_interleaver	GMR1 inter-burst (de)interleaver state
Cgmr1_pi4cxpsk_burst	Pi4-CxPSK Burst format description
Cgmr1_pi4cxpsk_data	Pi4-CxPSK Data segment description
Cgmr1_pi4cxpsk_modulation	Pi4-CxPSK modulation description
Cgmr1_pi4cxpsk_symbol	Pi4-CxPSK symbol description
Cgmr1_pi4cxpsk_sync	Pi4-CxPSK Synchronization sequence segment description
Cgmr1_puncturer	Structure describing a puncturing code
Ctch3_state
Ctch9_state
Ctone_desc	Structure describing a dual-frequency tone