diff options
Diffstat (limited to 'arm-wt-22k/lib_src/eas_pan.h')
-rw-r--r-- | arm-wt-22k/lib_src/eas_pan.h | 108 |
1 files changed, 54 insertions, 54 deletions
diff --git a/arm-wt-22k/lib_src/eas_pan.h b/arm-wt-22k/lib_src/eas_pan.h index cefa650..cb0a90d 100644 --- a/arm-wt-22k/lib_src/eas_pan.h +++ b/arm-wt-22k/lib_src/eas_pan.h @@ -1,16 +1,16 @@ -/*----------------------------------------------------------------------------
- *
- * File:
- * eas_pan.h
- *
- * Contents and purpose:
- * Calculates left and right gain multipliers based on a pan value from -63 to +63
- *
- * NOTES:
- * The _CMX_PARSER and _MFI_PARSER preprocessor symbols determine
- * whether the parser works for those particular file formats.
- *
- * Copyright Sonic Network Inc. 2005
+/*---------------------------------------------------------------------------- + * + * File: + * eas_pan.h + * + * Contents and purpose: + * Calculates left and right gain multipliers based on a pan value from -63 to +63 + * + * NOTES: + * The _CMX_PARSER and _MFI_PARSER preprocessor symbols determine + * whether the parser works for those particular file formats. + * + * Copyright Sonic Network Inc. 2005 * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -23,44 +23,44 @@ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. - *
- *----------------------------------------------------------------------------
- * Revision Control:
- * $Revision: 82 $
- * $Date: 2006-07-10 11:45:19 -0700 (Mon, 10 Jul 2006) $
- *----------------------------------------------------------------------------
-*/
-
-#ifndef EAS_PAN_H
-#define _EAS_PAN_H
-
-#include "eas_types.h"
-
-/*----------------------------------------------------------------------------
- * EAS_CalcPanControl()
- *----------------------------------------------------------------------------
- * Purpose:
- * Assign the left and right gain values corresponding to the given pan value.
- *
- * This routine uses sin/cos approximations for an equal power curve:
- *
- * sin(x) = (2-4*c)*x^2 + c + x
- * cos(x) = (2-4*c)*x^2 + c - x
- *
- * where c = 1/sqrt(2)
- * using the a0 + x*(a1 + x*a2) approach
- *
- * Inputs:
- * pan - pan value (-63 to + 63)
- *
- * Outputs:
- * pGainLeft linear gain multiplier for left channel (15-bit fraction)
- * pGainRight linear gain multiplier for left channel (15-bit fraction)
- *
- * Side Effects:
- *----------------------------------------------------------------------------
-*/
-void EAS_CalcPanControl (EAS_INT pan, EAS_I16 *pGainLeft, EAS_I16 *pGainRight);
-
-#endif
-
+ * + *---------------------------------------------------------------------------- + * Revision Control: + * $Revision: 82 $ + * $Date: 2006-07-10 11:45:19 -0700 (Mon, 10 Jul 2006) $ + *---------------------------------------------------------------------------- +*/ + +#ifndef EAS_PAN_H +#define _EAS_PAN_H + +#include "eas_types.h" + +/*---------------------------------------------------------------------------- + * EAS_CalcPanControl() + *---------------------------------------------------------------------------- + * Purpose: + * Assign the left and right gain values corresponding to the given pan value. + * + * This routine uses sin/cos approximations for an equal power curve: + * + * sin(x) = (2-4*c)*x^2 + c + x + * cos(x) = (2-4*c)*x^2 + c - x + * + * where c = 1/sqrt(2) + * using the a0 + x*(a1 + x*a2) approach + * + * Inputs: + * pan - pan value (-63 to + 63) + * + * Outputs: + * pGainLeft linear gain multiplier for left channel (15-bit fraction) + * pGainRight linear gain multiplier for left channel (15-bit fraction) + * + * Side Effects: + *---------------------------------------------------------------------------- +*/ +void EAS_CalcPanControl (EAS_INT pan, EAS_I16 *pGainLeft, EAS_I16 *pGainRight); + +#endif + |