| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #ifndef ANDROID_AUDIO_TRACK_SHARED_H |
| #define ANDROID_AUDIO_TRACK_SHARED_H |
| |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #include <utils/threads.h> |
| |
| namespace android { |
| |
| // ---------------------------------------------------------------------------- |
| |
| #define THREAD_PRIORITY_AUDIO_CLIENT (ANDROID_PRIORITY_AUDIO) |
| // Maximum cumulated timeout milliseconds before restarting audioflinger thread |
| #define MAX_STARTUP_TIMEOUT_MS 3000 // Longer timeout period at startup to cope with A2DP init time |
| #define MAX_RUN_TIMEOUT_MS 1000 |
| #define WAIT_PERIOD_MS 10 |
| |
| |
| struct audio_track_cblk_t |
| { |
| |
| // The data members are grouped so that members accessed frequently and in the same context |
| // are in the same line of data cache. |
| Mutex lock; |
| Condition cv; |
| volatile uint32_t user; |
| volatile uint32_t server; |
| uint32_t userBase; |
| uint32_t serverBase; |
| void* buffers; |
| uint32_t frameCount; |
| // Cache line boundary |
| uint32_t loopStart; |
| uint32_t loopEnd; |
| int loopCount; |
| volatile union { |
| uint16_t volume[2]; |
| uint32_t volumeLR; |
| }; |
| uint32_t sampleRate; |
| // NOTE: audio_track_cblk_t::frameSize is not equal to AudioTrack::frameSize() for |
| // 8 bit PCM data: in this case, mCblk->frameSize is based on a sample size of |
| // 16 bit because data is converted to 16 bit before being stored in buffer |
| uint32_t frameSize; |
| uint8_t channels; |
| uint8_t flowControlFlag; // underrun (out) or overrrun (in) indication |
| uint8_t out; // out equals 1 for AudioTrack and 0 for AudioRecord |
| uint8_t forceReady; |
| uint16_t bufferTimeoutMs; // Maximum cumulated timeout before restarting audioflinger |
| uint16_t waitTimeMs; // Cumulated wait time |
| // Cache line boundary (32 bytes) |
| |
| audio_track_cblk_t(); |
| uint32_t stepUser(uint32_t frameCount); |
| bool stepServer(uint32_t frameCount); |
| void* buffer(uint32_t offset) const; |
| uint32_t framesAvailable(); |
| uint32_t framesAvailable_l(); |
| uint32_t framesReady(); |
| }; |
| |
| |
| // ---------------------------------------------------------------------------- |
| |
| }; // namespace android |
| |
| #endif // ANDROID_AUDIO_TRACK_SHARED_H |