Dave Sparks | 56c99cd | 2009-08-24 17:35:45 -0700 | [diff] [blame] | 1 | /*---------------------------------------------------------------------------- |
| 2 | * |
| 3 | * File: |
| 4 | * eas_pcm.h |
| 5 | * |
| 6 | * Contents and purpose: |
| 7 | * External function prototypes for eas_pcm.c module |
| 8 | * |
| 9 | * |
| 10 | * Copyright Sonic Network Inc. 2005 |
The Android Open Source Project | 7df3010 | 2009-03-03 19:30:38 -0800 | [diff] [blame] | 11 | |
| 12 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 13 | * you may not use this file except in compliance with the License. |
| 14 | * You may obtain a copy of the License at |
| 15 | * |
| 16 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 17 | * |
| 18 | * Unless required by applicable law or agreed to in writing, software |
| 19 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 20 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 21 | * See the License for the specific language governing permissions and |
| 22 | * limitations under the License. |
Dave Sparks | 56c99cd | 2009-08-24 17:35:45 -0700 | [diff] [blame] | 23 | * |
| 24 | *---------------------------------------------------------------------------- |
| 25 | * Revision Control: |
| 26 | * $Revision: 847 $ |
| 27 | * $Date: 2007-08-27 21:30:08 -0700 (Mon, 27 Aug 2007) $ |
| 28 | *---------------------------------------------------------------------------- |
| 29 | */ |
| 30 | |
| 31 | #ifndef _EAS_PCM_H |
| 32 | #define _EAS_PCM_H |
| 33 | |
| 34 | /* default gain setting - roughly unity gain */ |
| 35 | #define PCM_DEFAULT_GAIN_SETTING 0x6000 |
| 36 | |
| 37 | typedef struct s_pcm_state_tag *EAS_PCM_HANDLE; |
| 38 | typedef void (*EAS_PCM_CALLBACK) (EAS_DATA_HANDLE pEASData, EAS_VOID_PTR cbInstData, EAS_PCM_HANDLE pcmHandle, EAS_STATE state); |
| 39 | |
Dave Sparks | 56c99cd | 2009-08-24 17:35:45 -0700 | [diff] [blame] | 40 | /*---------------------------------------------------------------------------- |
| 41 | * EAS_PEInit() |
| 42 | *---------------------------------------------------------------------------- |
| 43 | * Purpose: |
| 44 | * Initializes the PCM engine |
| 45 | * |
| 46 | * Inputs: |
| 47 | * |
| 48 | * |
| 49 | * Outputs: |
| 50 | * |
| 51 | * |
| 52 | * Side Effects: |
| 53 | * |
| 54 | *---------------------------------------------------------------------------- |
| 55 | */ |
| 56 | EAS_RESULT EAS_PEInit (EAS_DATA_HANDLE pEASData); |
| 57 | |
| 58 | /*---------------------------------------------------------------------------- |
| 59 | * EAS_PEShutdown() |
| 60 | *---------------------------------------------------------------------------- |
| 61 | * Purpose: |
| 62 | * Shuts down the PCM engine |
| 63 | * |
| 64 | * Inputs: |
| 65 | * |
| 66 | * |
| 67 | * Outputs: |
| 68 | * |
| 69 | * |
| 70 | * Side Effects: |
| 71 | * |
| 72 | *---------------------------------------------------------------------------- |
| 73 | */ |
| 74 | EAS_RESULT EAS_PEShutdown (EAS_DATA_HANDLE pEASData); |
| 75 | |
| 76 | /*---------------------------------------------------------------------------- |
Dave Sparks | 56c99cd | 2009-08-24 17:35:45 -0700 | [diff] [blame] | 77 | * EAS_PERender() |
| 78 | *---------------------------------------------------------------------------- |
| 79 | * Purpose: |
| 80 | * Render a buffer of PCM audio |
| 81 | * |
| 82 | * Inputs: |
| 83 | * |
| 84 | * |
| 85 | * Outputs: |
| 86 | * |
| 87 | * |
| 88 | * Side Effects: |
| 89 | * |
| 90 | *---------------------------------------------------------------------------- |
| 91 | */ |
| 92 | EAS_RESULT EAS_PERender (EAS_DATA_HANDLE pEASData, EAS_I32 numSamples); |
| 93 | |
Dave Sparks | 56c99cd | 2009-08-24 17:35:45 -0700 | [diff] [blame] | 94 | #endif /* end _EAS_PCM_H */ |
| 95 | |