static void start_preview(LiVESButton *button, lives_rfx_t *rfx) {
int i;
char *com;
lives_widget_set_sensitive(mainw->framedraw_preview,FALSE);
lives_widget_context_update();
if (mainw->did_rfx_preview) {
lives_kill_subprocesses(cfile->handle,TRUE);
if (cfile->start==0) {
cfile->start=1;
cfile->end=cfile->frames;
}
do_rfx_cleanup(rfx);
}
com=lives_strdup_printf("%s clear_pre_files \"%s\" 2>%s",prefs->backend_sync,cfile->handle,LIVES_DEVNULL);
lives_system(com,TRUE); // clear any .pre files from before
for (i=0; i<rfx->num_params; i++) {
rfx->params[i].changed=FALSE;
}
mainw->cancelled=CANCEL_NONE;
mainw->error=FALSE;
// within do_effect() we check and if
do_effect(rfx,TRUE); // actually start effect processing in the background
lives_widget_set_sensitive(mainw->framedraw_spinbutton,TRUE);
lives_widget_set_sensitive(mainw->framedraw_scale,TRUE);
if (mainw->framedraw_frame>cfile->start&&!(cfile->start==0&&mainw->framedraw_frame==1))
lives_spin_button_set_value(LIVES_SPIN_BUTTON(mainw->framedraw_spinbutton),cfile->start);
else {
load_rfx_preview(rfx);
}
mainw->did_rfx_preview=TRUE;
}
void load_rfx_preview(lives_rfx_t *rfx) {
// load a preview of an rfx (rendered effect) in clip editor
LiVESPixbuf *pixbuf;
FILE *infofile=NULL;
int max_frame=0,tot_frames=0;
int vend=cfile->start;
int retval;
int alarm_handle;
int current_file=mainw->current_file;
boolean retb;
boolean timeout;
weed_timecode_t tc;
const char *img_ext;
if (mainw->framedraw_frame==0) mainw->framedraw_frame=1;
lives_set_cursor_style(LIVES_CURSOR_BUSY,NULL);
clear_mainw_msg();
mainw->write_failed=FALSE;
if (cfile->clip_type==CLIP_TYPE_FILE&&vend<=cfile->end) {
// pull some frames for 10 seconds
alarm_handle=lives_alarm_set(LIVES_DEFAULT_TIMEOUT);
do {
lives_widget_context_update();
if (is_virtual_frame(mainw->current_file,vend)) {
retb=virtual_to_images(mainw->current_file,vend,vend,FALSE,NULL);
if (!retb) return;
}
vend++;
timeout=lives_alarm_get(alarm_handle);
} while (vend<=cfile->end&&!timeout&&!mainw->cancelled);
lives_alarm_clear(alarm_handle);
}
if (mainw->cancelled) {
lives_set_cursor_style(LIVES_CURSOR_NORMAL,NULL);
return;
}
// get message from back end processor
while (!(infofile=fopen(cfile->info_file,"r"))&&!mainw->cancelled) {
// wait until we get at least 1 frame
lives_widget_context_update();
if (cfile->clip_type==CLIP_TYPE_FILE&&vend<=cfile->end) {
// if we have a virtual clip (frames inside a video file)
// pull some more frames to images to get us started
do {
retb=FALSE;
if (is_virtual_frame(mainw->current_file,vend)) {
retb=virtual_to_images(mainw->current_file,vend,vend,FALSE,NULL);
if (!retb) {
fclose(infofile);
return;
}
}
vend++;
} while (vend<=cfile->end&&!retb);
} else {
// otherwise wait
lives_usleep(prefs->sleep_time);
}
}
if (mainw->cancelled) {
if (infofile) fclose(infofile);
lives_set_cursor_style(LIVES_CURSOR_NORMAL,NULL);
return;
}
do {
retval=0;
mainw->read_failed=FALSE;
lives_fgets(mainw->msg,512,infofile);
if (mainw->read_failed) retval=do_read_failed_error_s_with_retry(cfile->info_file,NULL,NULL);
} while (retval==LIVES_RESPONSE_RETRY);
fclose(infofile);
if (strncmp(mainw->msg,"completed",9)) {
if (rfx->num_in_channels>0) {
max_frame=atoi(mainw->msg);
} else {
int numtok=get_token_count(mainw->msg,'|');
if (numtok>4) {
char **array=lives_strsplit(mainw->msg,"|",numtok);
max_frame=atoi(array[0]);
cfile->hsize=atoi(array[1]);
cfile->vsize=atoi(array[2]);
cfile->fps=cfile->pb_fps=strtod(array[3],NULL);
if (cfile->fps==0) cfile->fps=cfile->pb_fps=prefs->default_fps;
tot_frames=atoi(array[4]);
lives_strfreev(array);
}
}
} else {
max_frame=cfile->end;
}
lives_set_cursor_style(LIVES_CURSOR_NORMAL,NULL);
if (max_frame>0) {
if (rfx->num_in_channels==0) {
int maxlen=calc_spin_button_width(1.,(double)tot_frames,0);
lives_spin_button_set_range(LIVES_SPIN_BUTTON(mainw->framedraw_spinbutton),1,tot_frames);
lives_entry_set_width_chars(LIVES_ENTRY(mainw->framedraw_spinbutton),maxlen);
lives_widget_queue_draw(mainw->framedraw_spinbutton);
lives_widget_queue_draw(mainw->framedraw_scale);
}
if (mainw->framedraw_frame>max_frame) {
lives_spin_button_set_value(LIVES_SPIN_BUTTON(mainw->framedraw_spinbutton),max_frame);
mainw->current_file=current_file;
return;
}
}
if (rfx->num_in_channels>0) {
img_ext=LIVES_FILE_EXT_PRE;
} else {
img_ext=get_image_ext_for_type(cfile->img_type);
}
tc=((mainw->framedraw_frame-1.))/cfile->fps*U_SECL;
pixbuf=pull_lives_pixbuf_at_size(mainw->current_file,mainw->framedraw_frame,(char *)img_ext,
tc,(double)cfile->hsize,
(double)cfile->vsize,LIVES_INTERP_BEST);
load_framedraw_image(pixbuf);
redraw_framedraw_image();
mainw->current_file=current_file;
}
static void start_preview(LiVESButton *button, lives_rfx_t *rfx) {
int i;
char *com;
lives_widget_set_sensitive(mainw->framedraw_preview,FALSE);
lives_widget_context_update();
if (mainw->did_rfx_preview) {
#ifndef IS_MINGW
com=lives_strdup_printf("%s stopsubsub \"%s\" 2>/dev/null",prefs->backend_sync,cfile->handle);
lives_system(com,TRUE); // try to stop any in-progress preview
#else
// get pid from backend
FILE *rfile;
ssize_t rlen;
char val[16];
int pid;
com=lives_strdup_printf("%s get_pid_for_handle \"%s\"",prefs->backend_sync,cfile->handle);
rfile=popen(com,"r");
rlen=fread(val,1,16,rfile);
pclose(rfile);
memset(val+rlen,0,1);
pid=atoi(val);
lives_win32_kill_subprocesses(pid,TRUE);
#endif
lives_free(com);
if (cfile->start==0) {
cfile->start=1;
cfile->end=cfile->frames;
}
do_rfx_cleanup(rfx);
}
#ifndef IS_MINGW
com=lives_strdup_printf("%s clear_pre_files \"%s\" 2>/dev/null",prefs->backend_sync,cfile->handle);
#else
com=lives_strdup_printf("%s clear_pre_files \"%s\" 2>NUL",prefs->backend_sync,cfile->handle);
#endif
lives_system(com,TRUE); // clear any .pre files from before
for (i=0; i<rfx->num_params; i++) {
rfx->params[i].changed=FALSE;
}
mainw->cancelled=CANCEL_NONE;
mainw->error=FALSE;
// within do_effect() we check and if
do_effect(rfx,TRUE); // actually start effect processing in the background
lives_widget_set_sensitive(mainw->framedraw_spinbutton,TRUE);
lives_widget_set_sensitive(mainw->framedraw_scale,TRUE);
if (mainw->framedraw_frame>cfile->start&&!(cfile->start==0&&mainw->framedraw_frame==1))
lives_spin_button_set_value(LIVES_SPIN_BUTTON(mainw->framedraw_spinbutton),cfile->start);
else {
load_rfx_preview(rfx);
}
mainw->did_rfx_preview=TRUE;
}
