The Android Open Source Project | 2729ea9 | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2007 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_AUDIO_TRACK_SHARED_H |
| 18 | #define ANDROID_AUDIO_TRACK_SHARED_H |
| 19 | |
| 20 | #include <stdint.h> |
| 21 | #include <sys/types.h> |
| 22 | |
| 23 | #include <utils/threads.h> |
| 24 | |
| 25 | namespace android { |
| 26 | |
| 27 | // ---------------------------------------------------------------------------- |
| 28 | |
| 29 | #define MAX_SAMPLE_RATE 65535 |
| 30 | #define THREAD_PRIORITY_AUDIO_CLIENT (ANDROID_PRIORITY_AUDIO) |
| 31 | |
| 32 | struct audio_track_cblk_t |
| 33 | { |
| 34 | enum { |
| 35 | SEQUENCE_MASK = 0xFFFFFF00, |
| 36 | BUFFER_MASK = 0x000000FF |
| 37 | }; |
| 38 | |
| 39 | Mutex lock; |
| 40 | Condition cv; |
| 41 | volatile uint32_t user; |
| 42 | volatile uint32_t server; |
| 43 | volatile union { |
| 44 | uint16_t volume[2]; |
| 45 | uint32_t volumeLR; |
| 46 | }; |
| 47 | uint16_t sampleRate; |
| 48 | uint16_t reserved; |
| 49 | |
| 50 | void* buffers; |
| 51 | size_t size; |
| 52 | |
| 53 | audio_track_cblk_t(); |
| 54 | uint32_t stepUser(int bufferCount); |
| 55 | bool stepServer(int bufferCount); |
| 56 | void* buffer(int id) const; |
| 57 | }; |
| 58 | |
| 59 | |
| 60 | // ---------------------------------------------------------------------------- |
| 61 | |
| 62 | }; // namespace android |
| 63 | |
| 64 | #endif // ANDROID_AUDIO_TRACK_SHARED_H |