diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/media/AudioTrack.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/media/AudioTrack.h b/include/media/AudioTrack.h index 72e51f9..b5256f0 100644 --- a/include/media/AudioTrack.h +++ b/include/media/AudioTrack.h @@ -580,7 +580,14 @@ public: * Caution: calling this method too often may be inefficient; * if you need a high resolution mapping between frame position and presentation time, * consider implementing that at application level, based on the low resolution timestamps. - * Returns NO_ERROR if timestamp is valid. + * Returns NO_ERROR if timestamp is valid. + * WOULD_BLOCK if called in STOPPED or FLUSHED state, or if called immediately after + * start/ACTIVE, when the number of frames consumed is less than the + * overall hardware latency to physical output. In WOULD_BLOCK cases, + * one might poll again, or use getPosition(), or use 0 position and + * current time for the timestamp. + * INVALID_OPERATION if called on a FastTrack, wrong state, or some other error. + * * The timestamp parameter is undefined on return, if status is not NO_ERROR. */ status_t getTimestamp(AudioTimestamp& timestamp); @@ -747,6 +754,8 @@ protected: // reset by stop() but continues monotonically // after new IAudioTrack to restore mPosition, // and could be easily widened to uint64_t + int64_t mStartUs; // the start time after flush or stop. + // only used for offloaded and direct tracks. audio_output_flags_t mFlags; // const after set(), except for bits AUDIO_OUTPUT_FLAG_FAST and AUDIO_OUTPUT_FLAG_OFFLOAD. |