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common/embeddedaudiosynthesis/arm-hybrid-22k/lib_src/eas_fmsynth.h

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+/*----------------------------------------------------------------------------
+ *
+ * File:
+ * eas_fmsynth.h
+ *
+ * Contents and purpose:
+ * Implements the FM synthesizer functions.
+ *
+ * Copyright Sonic Network Inc. 2004
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * 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: 90 $
+ *   $Date: 2006-07-11 20:18:13 -0700 (Tue, 11 Jul 2006) $
+ *----------------------------------------------------------------------------
+*/
+
+#ifndef fmsynthH
+#define fmsynthH
+
+#include "eas_data.h"
+
+#if defined (_FM_SYNTH)
+
+/* FM envelope state */
+typedef enum {
+    eFMEnvelopeStateAttack = 0,
+    eFMEnvelopeStateDecay,
+    eFMEnvelopeStateSustain,
+    eFMEnvelopeStateRelease,
+    eFMEnvelopeStateMuted,
+    eFMEnvelopeStateInvalid         /* should never be in this state! */
+} E_FM_ENVELOPE_STATE;
+
+/*------------------------------------
+ * S_OPERATOR data structure
+ *------------------------------------
+*/
+typedef struct s_operator_tag
+{
+    EAS_I16     pitch;              /* operator pitch in cents */
+    EAS_U16     envGain;            /* envelope target */
+    EAS_I16     baseGain;           /* patch gain (inc. vel & key scale) */
+    EAS_U16     outputGain;         /* current output gain */
+    EAS_U16     envRate;            /* calculated envelope rate */
+    EAS_U8      envState;           /* envelope state */
+    EAS_U8      pad;                /* pad to 16-bits */
+} S_OPERATOR;
+#endif
+
+typedef struct s_fm_voice_tag
+{
+    S_OPERATOR          oper[4];        /* operator data */
+    EAS_I16             voiceGain;      /* LFO + channel parameters */
+    EAS_U16             lfoPhase;       /* LFO current phase */
+    EAS_I16             lfoValue;       /* LFO current value */
+    EAS_U16             lfoDelay;       /* keeps track of elapsed delay time */
+    EAS_I8              pan;            /* stereo pan value (-64 to +64) */
+    EAS_I8              pad;            /* reserved to maintain alignment */
+} S_FM_VOICE;
+
+#ifdef _FM_EDITOR
+extern S_FM_REGION newPatch;
+extern S_FM_REGION OriginalPatch;
+#endif
+
+extern EAS_U32 freqTable[];
+
+#endif