void drive_open_loop(open_loop_params_t *params)
{
int ref_frequency = params->frequency;
int acceleration = params->acceleration;
int frequency = open_loop_acceleration(ref_frequency, acceleration);
sine_param_t sine_params;
sine_params.direction = is_negative(frequency);
sine_params.amplitude_pwm = vf_control(abs(frequency));
sine_params.freq_m = abs(frequency);
sine_set_params(&sine_params);
}
double update_video(struct MPContext *mpctx, double endpts)
{
struct dec_video *d_video = mpctx->d_video;
struct vo *video_out = mpctx->video_out;
vf_control(d_video->vfilter, VFCTRL_SET_OSD_OBJ, mpctx->osd); // for vf_sub
if (!mpctx->opts->correct_pts)
return update_video_nocorrect_pts(mpctx);
if (d_video->header->attached_picture)
return update_video_attached_pic(mpctx);
double pts;
while (1) {
if (load_next_vo_frame(mpctx, false))
break;
pts = MP_NOPTS_VALUE;
struct demux_packet *pkt = NULL;
while (1) {
pkt = demux_read_packet(d_video->header);
if (!pkt || pkt->len)
break;
/* Packets with size 0 are assumed to not correspond to frames,
* but to indicate the absence of a frame in formats like AVI
* that must have packets at fixed timecode intervals. */
talloc_free(pkt);
}
if (pkt)
pts = pkt->pts;
if (pts != MP_NOPTS_VALUE)
pts += mpctx->video_offset;
if (pts >= mpctx->hrseek_pts - .005)
mpctx->hrseek_framedrop = false;
int framedrop_type = mpctx->hrseek_active && mpctx->hrseek_framedrop ?
1 : check_framedrop(mpctx, -1);
struct mp_image *decoded_frame =
video_decode(d_video, pkt, framedrop_type, pts);
talloc_free(pkt);
if (decoded_frame) {
determine_frame_pts(mpctx);
filter_video(mpctx, decoded_frame);
} else if (!pkt) {
if (!load_next_vo_frame(mpctx, true))
return -1;
}
break;
}
if (!video_out->frame_loaded)
return 0;
pts = video_out->next_pts;
if (pts == MP_NOPTS_VALUE) {
MP_ERR(mpctx, "Video pts after filters MISSING\n");
// Try to use decoder pts from before filters
pts = d_video->pts;
if (pts == MP_NOPTS_VALUE)
pts = d_video->last_pts;
}
if (endpts == MP_NOPTS_VALUE || pts < endpts)
add_frame_pts(mpctx, pts);
if (mpctx->hrseek_active && pts < mpctx->hrseek_pts - .005) {
vo_skip_frame(video_out);
return 0;
}
mpctx->hrseek_active = false;
d_video->pts = pts;
if (d_video->last_pts == MP_NOPTS_VALUE) {
d_video->last_pts = d_video->pts;
} else if (d_video->last_pts > d_video->pts) {
MP_WARN(mpctx, "Decreasing video pts: %f < %f\n",
d_video->pts, d_video->last_pts);
/* If the difference in pts is small treat it as jitter around the
* right value (possibly caused by incorrect timestamp ordering) and
* just show this frame immediately after the last one.
* Treat bigger differences as timestamp resets and start counting
* timing of later frames from the position of this one. */
if (d_video->last_pts - d_video->pts > 0.5)
d_video->last_pts = d_video->pts;
else
d_video->pts = d_video->last_pts;
} else if (d_video->pts >= d_video->last_pts + 60) {
// Assume a PTS difference >= 60 seconds is a discontinuity.
MP_WARN(mpctx, "Jump in video pts: %f -> %f\n",
d_video->last_pts, d_video->pts);
d_video->last_pts = d_video->pts;
}
double frame_time = d_video->pts - d_video->last_pts;
d_video->last_pts = d_video->pts;
if (mpctx->d_audio)
mpctx->delay -= frame_time;
return frame_time;
}
