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;
}
int aq_add(int32 *samples, int32 count)
{
int32 nbytes, i;
char *buff;
if(!(play_mode->flag & PF_PCM_STREAM))
return 0;
if(!count)
{
if(!aq_fill_buffer_flag)
return aq_fill_nonblocking();
return 0;
}
aq_add_count += count;
do_effect(samples, count);
nbytes = general_output_convert(samples, count);
buff = (char *)samples;
if(device_qsize == 0)
return play_mode->output_data(buff, nbytes);
aq_fill_buffer_flag = (aq_add_count <= aq_start_count);
if(!aq_fill_buffer_flag)
if(aq_fill_nonblocking() == -1)
return -1;
if(!ctl->trace_playing)
{
while((i = add_play_bucket(buff, nbytes)) < nbytes)
{
buff += i;
nbytes -= i;
if(head && head->len == bucket_size)
{
if(aq_fill_one() == -1)
return -1;
}
aq_fill_buffer_flag = 0;
}
return 0;
}
trace_loop();
while((i = add_play_bucket(buff, nbytes)) < nbytes)
{
/* Software buffer is full.
* Write one bucket to audio device.
*/
buff += i;
nbytes -= i;
aq_wait_ticks();
trace_loop();
if(aq_fill_nonblocking() == -1)
return -1;
aq_fill_buffer_flag = 0;
}
return 0;
}
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;
}
