diff options
Diffstat (limited to 'include/private')
| -rw-r--r-- | include/private/media/AudioTrackShared.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/include/private/media/AudioTrackShared.h b/include/private/media/AudioTrackShared.h index b661cb9..33a92cd 100644 --- a/include/private/media/AudioTrackShared.h +++ b/include/private/media/AudioTrackShared.h @@ -85,7 +85,9 @@ struct audio_track_cblk_t uint16_t bufferTimeoutMs; // Maximum cumulated timeout before restarting audioflinger uint16_t waitTimeMs; // Cumulated wait time - uint16_t sendLevel; +private: + uint16_t mSendLevel; // Fixed point U4.12 so 0x1000 means 1.0 +public: volatile int32_t flags; // Cache line boundary (32 bytes) @@ -98,6 +100,19 @@ struct audio_track_cblk_t uint32_t framesAvailable_l(); uint32_t framesReady(); bool tryLock(); + + // No barriers on the following operations, so the ordering of loads/stores + // with respect to other parameters is UNPREDICTABLE. That's considered safe. + + // for AudioTrack client only, caller must limit to 0.0 <= sendLevel <= 1.0 + void setSendLevel(float sendLevel) { + mSendLevel = uint16_t(sendLevel * 0x1000); + } + + // for AudioFlinger only; the return value must be validated by the caller + uint16_t getSendLevel_U4_12() const { + return mSendLevel; + } }; |