eas_wt_IPC_frame.h revision a8c89077d78769bf4840fa91609edc51fe2fa02d 
1/*----------------------------------------------------------------------------
2 *
3 * File:
4 * eas_wt_IPC_frame.h
5 *
6 * Contents and purpose:
7 * This module contains data definitions for the interprocessor
8 * communications framework for a split-architecture synthesizer.
9 *
10 * This sample version writes IPC data to a file that can be used
11 * as a test vector for the DSP simulator. For a real-time system
12 * the file I/O is replaced with an IPC protocol in the hardware.
13 *
14 * Synchronization with the DSP is accomplished at the API level,
15 * i.e. the host code should call EAS_Render when it is ready to
16 * buffer another block of data for transmission to the DSP.
17 *
18 * Copyright Sonic Network Inc. 2005
19
20 * Licensed under the Apache License, Version 2.0 (the "License");
21 * you may not use this file except in compliance with the License.
22 * You may obtain a copy of the License at
23 *
24 *      http://www.apache.org/licenses/LICENSE-2.0
25 *
26 * Unless required by applicable law or agreed to in writing, software
27 * distributed under the License is distributed on an "AS IS" BASIS,
28 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
29 * See the License for the specific language governing permissions and
30 * limitations under the License.
31 *
32 *----------------------------------------------------------------------------
33 * Revision Control:
34 *   $Revision: 818 $
35 *   $Date: 2007-08-02 15:19:41 -0700 (Thu, 02 Aug 2007) $
36 *----------------------------------------------------------------------------
37*/
38
39#ifndef _EAS_WT_IPC_FRAME_H
40#define _EAS_WT_IPC_FRAME_H
41
42/*----------------------------------------------------------------------------
43 * S_WT_FRAME
44 *
45 * This structure contains the common parameters that are updated
46  *for each frame of audio.
47 *----------------------------------------------------------------------------
48*/
49typedef struct s_wt_frame_tag
50{
51    EAS_I32         gainTarget;
52    EAS_I32         phaseIncrement;
53
54#if defined(_FILTER_ENABLED)
55    EAS_I32         k;
56    EAS_I32         b1;
57    EAS_I32         b2;
58#endif
59} S_WT_FRAME;
60
61/*----------------------------------------------------------------------------
62 * S_WT_CONFIG
63 *
64 * This structure contains state data for the wavetable engine
65 *----------------------------------------------------------------------------
66*/
67typedef struct s_wt_config_tag
68{
69    EAS_U32             loopEnd;                /* points to last PCM sample (not 1 beyond last) */
70    EAS_U32             loopStart;              /* points to first sample at start of loop */
71    EAS_U32             phaseAccum;             /* current sample, integer portion of phase */
72
73#if (NUM_OUTPUT_CHANNELS == 2)
74    EAS_I16             gainLeft;               /* left channel gain */
75    EAS_I16             gainRight;              /* right channel gain */
76#endif
77
78    EAS_I16             gain;                   /* current voice gain */
79} S_WT_CONFIG;
80
81#endif
82
83