function __clipTrim($clip, $start, $stop, $fps)
{
$zero = floatval(0);
$one = floatval(1);
$result = array();
// if clip is composited start is zero
$orig_clip_start = $clip['start'];
if ($clip['track']) {
$start -= $orig_clip_start;
$stop -= $orig_clip_start;
$orig_clip_start = $zero;
}
$orig_clip_length = $clip['length'];
$orig_clip_end = $orig_clip_length + $orig_clip_start;
$clip_start = floatmax($orig_clip_start, $start);
$clip_length = floatmin($orig_clip_end, $stop) - $clip_start;
$orig_clip_trimstart = $clip['trimstart'];
$clip_trimstart = $orig_clip_trimstart + ($clip_start - $orig_clip_start);
$frame_seconds = $one / $fps;
$clip_trimstart = floor($clip_trimstart / $frame_seconds) * $frame_seconds;
$clip_length = floor($clip_length / $frame_seconds) * $frame_seconds;
$media_duration = $clip['duration'];
if (!floatgtr($media_duration, $zero)) {
$media_duration = $orig_clip_length;
}
// trim may not round out well, so check it
$clip_length = floatmin($clip_length, $media_duration - $clip_trimstart);
if (floatgtr($clip_length, $zero)) {
$result['trimstart'] = $clip_trimstart;
$result['trimlength'] = $clip_length;
$result['medialength'] = $media_duration;
} else {
throw new UnexpectedValueException('Could not determine trim of clip with no length: ' . $clip['id']);
}
return $result;
}
function scale_switches($orig_dims, $dims, $fill)
{
$target_w = floatval($dims[0]);
$target_h = floatval($dims[1]);
$vf = '';
$scale = 'scale=' . $target_w . ':' . $target_h;
if ($fill && $fill != 'stretch') {
$orig_even_w = floatval($orig_dims[0]);
$orig_dims1 = floatval($orig_dims[1]);
$extra0 = $orig_even_w % 2;
$extra1 = $orig_dims1 % 2;
$orig_even_w -= $extra0;
$orig_dims1 -= $extra1;
$ratio_w = $target_w / $orig_even_w;
$ratio_h = $target_h / $orig_dims1;
if (!floatcmp($ratio_w, $ratio_h)) {
$multiplier = $fill == 'scale' ? floatmin($ratio_w, $ratio_h) : floatmax($ratio_w, $ratio_h);
$scaled_w = round($target_w / $multiplier);
$scaled_h = round($target_h / $multiplier);
if (!floatcmp($orig_even_w, $scaled_w)) {
if (floatgtr($orig_even_w, $scaled_w)) {
//$a['cropleft'] = $a['cropright'] = floor((($orig_even_w - $scaled_w) / 2));
$vf .= 'crop=' . floor(($orig_even_w - $scaled_w) / 2) . ':0:' . $scaled_w . ':' . $scaled_h;
} else {
/*$pad_x = $pad_width = floor(($scaled_w -$orig_even_w) / 2);
$pad_x -= $extra0;
$dims[0] -= 2 * $pad_width;
$dims[0] += $extra0;
$dims[1] += $extra1;
*/
$vf .= 'pad=' . $scaled_w . ':' . $scaled_h . ':' . (floor(($scaled_w - $orig_even_w) / 2) - $extra0) . ':0';
}
}
if (!floatcmp($orig_dims1, $scaled_h)) {
if (floatgtr($orig_dims1, $scaled_h)) {
$vf .= 'crop=0:' . floor(($orig_dims1 - $scaled_h) / 2) . ':' . $scaled_w . ':' . $scaled_h;
} else {
/*
$pad_y = $pad_height = floor(($scaled_h - $orig_dims1) / 2);
$pad_y -= $extra1;
$dims[1] -= 2 * $pad_height;
$dims[1] += $extra1;
$dims[0] += $extra0;
*/
$vf .= 'pad=' . $scaled_w . ':' . $scaled_h . ':0:' . (floor(($scaled_h - $orig_dims1) / 2) - $extra1);
}
}
}
//$a['s'] = $dims[0] . 'x' . $dims[1];
}
if ($vf) {
$vf .= ',';
}
$vf .= $scale;
$a = array();
$a['vf'] = $vf;
return $a;
}
