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author | Marton Balint <cus@passwd.hu> | 2011-08-14 20:21:25 +0200 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2011-08-15 03:49:07 +0200 |
commit | 10b7b4a6a1585a7c46487b00594798cdd92eed37 (patch) | |
tree | f076ab577eb3db06ef0acfff2e789cb730231f61 /configure | |
parent | abf6b0d1ea231cc52008e9eaa1d2902442e1cbba (diff) | |
download | ffmpeg-10b7b4a6a1585a7c46487b00594798cdd92eed37.tar.gz |
ffplay: more precise audio clock based on current time
Since SDL has no audio buffer fullness info, one can get a much precise audio
clock based on the last time of the audio callback and the elapsed time since.
To achieve this I introduced the audio_current_pts and audio_current_pts_drift
variables (similar to video_current_pts and video_current_pts_drift) and
calculate them in the end of the audio callback, when VideoState->audio_clock
is already updated. The reference time I use is from the start of the audio
callback, because this way the amount of time used for audio decoding is not
interfereing with calculation.
I also replaced the audio_write_get_buf_size function with a calculated
variable because when the audio frame decoding is in progress audio_buf_size
and audio_buf_index are not stable, so using them from other threads are not a
good idea.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'configure')
0 files changed, 0 insertions, 0 deletions