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Diffstat (limited to 'include/private/media/AudioTrackShared.h')
-rw-r--r-- | include/private/media/AudioTrackShared.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/include/private/media/AudioTrackShared.h b/include/private/media/AudioTrackShared.h new file mode 100644 index 0000000..1991aa7 --- /dev/null +++ b/include/private/media/AudioTrackShared.h @@ -0,0 +1,83 @@ +/* + * 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 MAX_SAMPLE_RATE 65535 +#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; + }; + uint16_t sampleRate; + uint16_t channels; + int16_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 + // Padding ensuring that data buffer starts on a cache line boundary (32 bytes). + // See AudioFlinger::TrackBase constructor + int32_t Padding[3]; + + 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 |