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Experimental support for -framedrop with -correct-pts.

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The code is not really correct, but it is very little and works "well enough"
to be useful in my tests.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26260 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
reimar 2008-03-17 20:21:16 +00:00
parent 903ef10062
commit 7d42c23753
2 changed files with 31 additions and 23 deletions
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4
DOCS/man/en/mplayer.1
View File

@ -840,7 +840,7 @@ Currently the following drivers are fixed-vo compliant: gl, gl2, mga, svga, x11,
xmga, xv, xvidix and dfbmga.
.
.TP
.B \-framedrop (also see \-hardframedrop, only works with \-no\-correct\-pts)
.B \-framedrop (also see \-hardframedrop, experimental without \-no\-correct\-pts)
Skip displaying some frames to maintain A/V sync on slow systems.
Video filters are not applied to such frames.
For B-frames even decoding is skipped completely.
@ -856,7 +856,7 @@ Does not work as a config-file option.
Show short summary of options.
.
.TP
.B \-hardframedrop (only works with \-no\-correct\-pts)
.B \-hardframedrop (experimental without \-no\-correct\-pts)
More intense frame dropping (breaks decoding).
Leads to image distortion!
Note that especially the libmpeg2 decoder may crash with this,

50
mplayer.c
View File

@ -1708,6 +1708,27 @@ double playing_audio_pts(sh_audio_t *sh_audio, demux_stream_t *d_audio,
audio_out->get_delay();
}
static int check_framedrop(double frame_time) {
// check for frame-drop:
current_module = "check_framedrop";
if (mpctx->sh_audio && !mpctx->d_audio->eof) {
static int dropped_frames;
float delay = playback_speed*mpctx->audio_out->get_delay();
float d = delay-mpctx->delay;
++total_frame_cnt;
// we should avoid dropping too many frames in sequence unless we
// are too late. and we allow 100ms A-V delay here:
if (d < -dropped_frames*frame_time-0.100 &&
mpctx->osd_function != OSD_PAUSE) {
++drop_frame_cnt;
++dropped_frames;
return frame_dropping;
} else
dropped_frames = 0;
}
return 0;
}
static int generate_video_frame(sh_video_t *sh_video, demux_stream_t *d_video)
{
unsigned char *start;
@ -1716,6 +1737,7 @@ static int generate_video_frame(sh_video_t *sh_video, demux_stream_t *d_video)
double pts;
while (1) {
int drop_frame = check_framedrop(sh_video->frametime);
void *decoded_frame;
current_module = "decode video";
// XXX Time used in this call is not counted in any performance
@ -1733,7 +1755,7 @@ static int generate_video_frame(sh_video_t *sh_video, demux_stream_t *d_video)
if (in_size > max_framesize)
max_framesize = in_size;
current_module = "decode video";
decoded_frame = decode_video(sh_video, start, in_size, 0, pts);
decoded_frame = decode_video(sh_video, start, in_size, drop_frame, pts);
if (decoded_frame) {
update_subtitles(sh_video, mpctx->d_sub, 0);
update_teletext(sh_video, mpctx->demuxer, 0);
@ -1741,7 +1763,8 @@ static int generate_video_frame(sh_video_t *sh_video, demux_stream_t *d_video)
current_module = "filter video";
if (filter_video(sh_video, decoded_frame, sh_video->pts))
break;
}
} else if (drop_frame)
return -1;
if (hit_eof)
return 0;
}
@ -2253,23 +2276,7 @@ static double update_video(int *blit_frame)
mpctx->delay -= frame_time;
// video_read_frame can change fps (e.g. for ASF video)
vo_fps = sh_video->fps;
// check for frame-drop:
current_module = "check_framedrop";
if (mpctx->sh_audio && !mpctx->d_audio->eof) {
static int dropped_frames;
float delay = playback_speed*mpctx->audio_out->get_delay();
float d = delay-mpctx->delay;
// we should avoid dropping too many frames in sequence unless we
// are too late. and we allow 100ms A-V delay here:
if (d < -dropped_frames*frame_time-0.100 &&
mpctx->osd_function != OSD_PAUSE) {
drop_frame = frame_dropping;
++drop_frame_cnt;
++dropped_frames;
} else
drop_frame = dropped_frames = 0;
++total_frame_cnt;
}
drop_frame = check_framedrop(frame_time);
update_subtitles(sh_video, mpctx->d_sub, 0);
update_teletext(sh_video, mpctx->demuxer, 0);
update_osd_msg();
@ -2290,7 +2297,8 @@ static double update_video(int *blit_frame)
sh_video->pts));
}
else {
if (!generate_video_frame(sh_video, mpctx->d_video))
int res = generate_video_frame(sh_video, mpctx->d_video);
if (!res)
return -1;
((vf_instance_t *)sh_video->vfilter)->control(sh_video->vfilter,
VFCTRL_GET_PTS, &sh_video->pts);
@ -2309,7 +2317,7 @@ static double update_video(int *blit_frame)
sh_video->timer += frame_time;
if(mpctx->sh_audio)
mpctx->delay -= frame_time;
*blit_frame = 1;
*blit_frame = res > 0;
}
return frame_time;
}