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implement smooth seeking acceleration for audio playback and mpegplayer

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17843 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Marcoen Hirschberg 2008-06-28 17:55:53 +00:00
parent bcf9b5dfa6
commit 2fb70bcabb
4 changed files with 78 additions and 20 deletions
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10
apps/plugins/mpegplayer/mpegplayer.c
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@ -1109,8 +1109,7 @@ static int wvs_get_status(void)
static uint32_t wvs_ff_rw(int btn, unsigned refresh)
{
unsigned int step = TS_SECOND*rb->global_settings->ff_rewind_min_step;
const long ff_rw_accel = rb->global_settings->ff_rewind_accel;
long accel_tick = *rb->current_tick + ff_rw_accel*HZ;
const long ff_rw_accel = (rb->global_settings->ff_rewind_accel + 3);
uint32_t start;
uint32_t time = stream_get_seek_time(&start);
const uint32_t duration = stream_get_duration();
@ -1145,7 +1144,6 @@ static uint32_t wvs_ff_rw(int btn, unsigned refresh)
while (1)
{
long tick = *rb->current_tick;
stream_keep_disk_active();
switch (btn)
@ -1199,10 +1197,8 @@ static uint32_t wvs_ff_rw(int btn, unsigned refresh)
ff_rw_count += step;
if (ff_rw_accel != 0 && TIME_AFTER(tick, accel_tick)) {
step *= 2;
accel_tick = tick + ff_rw_accel*HZ;
}
/* smooth seeking by multiplying step by: 1 + (2 ^ -accel) */
step += step >> ff_rw_accel;
if (wvs.status == WVS_STATUS_FF) {
if (duration - time <= ff_rw_count)