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player: dynamically change cache wait times

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Remove the hardcoded wait time of 2 seconds. Instead, adjust the wait
time each time we unpause: if downloading the data took longer than its
estimated playback time, increase the amount of data we wait for. If
it's shorter, decrease it.

The +/- is supposed to avoid oscillating between two values if the
elapsed time and the wait time are similar. It's not sure if this
actually helps with anything, but it can't harm.
This commit is contained in:
wm4 2014-08-27 23:12:24 +02:00
parent cb642e7c84
commit f8a1bd1253
2 changed files with 13 additions and 1 deletions
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1
player/core.h
View File

@ -345,6 +345,7 @@ typedef struct MPContext {
bool playing_msg_shown;
bool paused_for_cache;
double cache_stop_time, cache_wait_time;
// Set after showing warning about decoding being too slow for realtime
// playback rate. Used to avoid showing it multiple times.

13
player/playloop.c
View File

@ -128,6 +128,7 @@ void reset_playback_state(struct MPContext *mpctx)
mpctx->hrseek_framedrop = false;
mpctx->playback_pts = MP_NOPTS_VALUE;
mpctx->last_seek_pts = MP_NOPTS_VALUE;
mpctx->cache_wait_time = 0;
mpctx->restart_complete = false;
#if HAVE_ENCODING
@ -529,7 +530,16 @@ static void handle_pause_on_low_cache(struct MPContext *mpctx)
if (mpctx->restart_complete && idle != -1) {
if (mpctx->paused && mpctx->paused_for_cache) {
if (!opts->cache_pausing || s.ts_duration >= 2.0 || s.idle) {
mpctx->cache_wait_time = MPCLAMP(mpctx->cache_wait_time, 1, 10);
if (!opts->cache_pausing || s.ts_duration >= mpctx->cache_wait_time
|| s.idle)
{
double elapsed_time = mp_time_sec() - mpctx->cache_stop_time;
if (elapsed_time > mpctx->cache_wait_time) {
mpctx->cache_wait_time *= 1.5 + 0.1;
} else {
mpctx->cache_wait_time /= 1.5 - 0.1;
}
mpctx->paused_for_cache = false;
if (!opts->pause)
unpause_player(mpctx);
@ -541,6 +551,7 @@ static void handle_pause_on_low_cache(struct MPContext *mpctx)
pause_player(mpctx);
mpctx->paused_for_cache = true;
opts->pause = prev_paused_user;
mpctx->cache_stop_time = mp_time_sec();
}
}
}