audio_return_t (*pcm_start)(void *audio_handle, void *pcm_handle);
audio_return_t (*pcm_stop)(void *audio_handle, void *pcm_handle);
audio_return_t (*pcm_close)(void *audio_handle, void *pcm_handle);
audio_return_t (*pcm_start)(void *audio_handle, void *pcm_handle);
audio_return_t (*pcm_stop)(void *audio_handle, void *pcm_handle);
audio_return_t (*pcm_close)(void *audio_handle, void *pcm_handle);