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

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+/*----------------------------------------------------------------------------
+ *
+ * File:
+ * eas_wt_IPC_frame.h
+ *
+ * Contents and purpose:
+ * This module contains data definitions for the interprocessor
+ * communications framework for a split-architecture synthesizer.
+ *
+ * This sample version writes IPC data to a file that can be used
+ * as a test vector for the DSP simulator. For a real-time system
+ * the file I/O is replaced with an IPC protocol in the hardware.
+ *
+ * Synchronization with the DSP is accomplished at the API level,
+ * i.e. the host code should call EAS_Render when it is ready to
+ * buffer another block of data for transmission to the DSP.
+ *
+ * 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.
+ * 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: 818 $
+ *   $Date: 2007-08-02 15:19:41 -0700 (Thu, 02 Aug 2007) $
+ *----------------------------------------------------------------------------
+*/
+
+#ifndef _EAS_WT_IPC_FRAME_H
+#define _EAS_WT_IPC_FRAME_H
+
+/*----------------------------------------------------------------------------
+ * S_WT_FRAME
+ *
+ * This structure contains the common parameters that are updated
+  *for each frame of audio.
+ *----------------------------------------------------------------------------
+*/
+typedef struct s_wt_frame_tag
+{
+    EAS_I32         gainTarget;
+    EAS_I32         phaseIncrement;
+
+#if defined(_FILTER_ENABLED)
+    EAS_I32         k;
+    EAS_I32         b1;
+    EAS_I32         b2;
+#endif
+} S_WT_FRAME;
+
+/*----------------------------------------------------------------------------
+ * S_WT_CONFIG
+ *
+ * This structure contains state data for the wavetable engine
+ *----------------------------------------------------------------------------
+*/
+typedef struct s_wt_config_tag
+{
+    EAS_U32             loopEnd;                /* points to last PCM sample (not 1 beyond last) */
+    EAS_U32             loopStart;              /* points to first sample at start of loop */
+    EAS_U32             phaseAccum;             /* current sample, integer portion of phase */
+
+#if (NUM_OUTPUT_CHANNELS == 2)
+    EAS_I16             gainLeft;               /* left channel gain */
+    EAS_I16             gainRight;              /* right channel gain */
+#endif
+
+    EAS_I16             gain;                   /* current voice gain */
+} S_WT_CONFIG;
+
+#endif
+