diff options
Diffstat (limited to 'include/private/media/AudioTrackShared.h')
| -rw-r--r-- | include/private/media/AudioTrackShared.h | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/include/private/media/AudioTrackShared.h b/include/private/media/AudioTrackShared.h index 1878f3c..72ed281 100644 --- a/include/private/media/AudioTrackShared.h +++ b/include/private/media/AudioTrackShared.h @@ -31,29 +31,41 @@ namespace android { struct audio_track_cblk_t { - enum { - SEQUENCE_MASK = 0xFFFFFF00, - BUFFER_MASK = 0x000000FF - }; + // 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 reserved; - - void* buffers; - size_t size; - + 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; + // Padding ensuring that data buffer starts on a cache line boundary (32 bytes). + // See AudioFlinger::TrackBase constructor + int32_t Padding[4]; + audio_track_cblk_t(); - uint32_t stepUser(int bufferCount); - bool stepServer(int bufferCount); - void* buffer(int id) const; + 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(); }; |