| /* |
| * 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 { |
| |
| // ---------------------------------------------------------------------------- |
| |
| // 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 |
| #define RESTORE_TIMEOUT_MS 5000 // Maximum waiting time for a track to be restored |
| |
| #define CBLK_UNDERRUN_MSK 0x0001 |
| #define CBLK_UNDERRUN_ON 0x0001 // underrun (out) or overrrun (in) indication |
| #define CBLK_UNDERRUN_OFF 0x0000 // no underrun |
| #define CBLK_DIRECTION_MSK 0x0002 |
| #define CBLK_DIRECTION_OUT 0x0002 // this cblk is for an AudioTrack |
| #define CBLK_DIRECTION_IN 0x0000 // this cblk is for an AudioRecord |
| #define CBLK_FORCEREADY_MSK 0x0004 |
| #define CBLK_FORCEREADY_ON 0x0004 // track is considered ready immediately by AudioFlinger |
| #define CBLK_FORCEREADY_OFF 0x0000 // track is ready when buffer full |
| #define CBLK_INVALID_MSK 0x0008 |
| #define CBLK_INVALID_ON 0x0008 // track buffer is invalidated by AudioFlinger: |
| #define CBLK_INVALID_OFF 0x0000 // must be re-created |
| #define CBLK_DISABLED_MSK 0x0010 |
| #define CBLK_DISABLED_ON 0x0010 // track disabled by AudioFlinger due to underrun: |
| #define CBLK_DISABLED_OFF 0x0000 // must be re-started |
| #define CBLK_RESTORING_MSK 0x0020 |
| #define CBLK_RESTORING_ON 0x0020 // track is being restored after invalidation |
| #define CBLK_RESTORING_OFF 0x0000 // by AudioFlinger |
| #define CBLK_RESTORED_MSK 0x0040 |
| #define CBLK_RESTORED_ON 0x0040 // track has been restored after invalidation |
| #define CBLK_RESTORED_OFF 0x0040 // by AudioFlinger |
| |
| 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; // sizeof(int) |
| Condition cv; // sizeof(int) |
| 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 |
| |
| uint8_t frameSize; // would normally be size_t, but 8 bits is plenty |
| uint8_t pad1; |
| uint16_t bufferTimeoutMs; // Maximum cumulated timeout before restarting audioflinger |
| |
| uint16_t waitTimeMs; // Cumulated wait time |
| uint16_t sendLevel; |
| volatile int32_t flags; |
| |
| // 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(); |
| bool tryLock(); |
| }; |
| |
| |
| // ---------------------------------------------------------------------------- |
| |
| }; // namespace android |
| |
| #endif // ANDROID_AUDIO_TRACK_SHARED_H |