-void aout_FormatPrepare( audio_sample_format_t * p_format );
-VLC_EXPORT( void, aout_FormatPrint, ( aout_instance_t * p_aout, const char * psz_text, audio_sample_format_t * p_format ) );
-VLC_EXPORT( void, aout_FormatsPrint, ( aout_instance_t * p_aout, const char * psz_text, audio_sample_format_t * p_format1, audio_sample_format_t * p_format2 ) );
+VLC_EXPORT( void, aout_FormatPrepare, ( audio_sample_format_t * p_format ) );
+VLC_EXPORT( void, aout_FormatPrint, ( aout_instance_t * p_aout, const char * psz_text, const audio_sample_format_t * p_format ) );
+VLC_EXPORT( void, aout_FormatsPrint, ( aout_instance_t * p_aout, const char * psz_text, const audio_sample_format_t * p_format1, const audio_sample_format_t * p_format2 ) );