static function mashInfo($xml, $path = 'http://www.example.com/', $fps = 0, $exact = FALSE)
{
if (!$fps) {
$fps = MovieMasher_Coder_Decoder::defaultOption('DecoderFPS');
}
$render_clips = array();
$result = array();
$result['has_audio'] = FALSE;
$result['has_video'] = FALSE;
$result['clips'] = array();
// indexed array() of arrays with keys needed for quick sorting and time based retrieval (start, stop)
$result['render_all'] = $exact;
// switch for full flash rendering
$result['cache_urls'] = array();
// files needing to be cached
$result['timespans'] = array();
// array(startseconds, stopseconds, startframe, framecount, framecounter)
$result['media'] = array();
// holds references to all media tags (they may get altered)
$mash_tags = $xml->xpath('//mash');
if (!sizeof($mash_tags)) {
throw new UnexpectedValueException('No mash tag found');
}
$mash_tag = $mash_tags[0];
$quantize = floatval($mash_tag['quantize']);
if (!$quantize) {
$quantize = floatval(1);
}
$result['quantize'] = $quantize;
// grab all media tags, even nested ones
$media_tags = $xml->xpath('//media');
$media_count = sizeof($media_tags);
for ($i = 0; $i < $media_count; $i++) {
$media = $media_tags[$i];
$result['media'][(string) $media['id']] = $media;
}
// grab all clip tags within mash, even nested ones
$clip_tags = $xml->mash->xpath('//clip');
$clip_count = sizeof($clip_tags);
$result['duration'] = floatval(0);
for ($i = 0; $i < $clip_count; $i++) {
$clip_tag = $clip_tags[$i];
$id = (string) $clip_tag['id'];
if (!isset($result['media'][$id])) {
throw new UnexpectedValueException('No media found for clip ID ' . $id);
}
$media = $result['media'][$id];
$clip = array();
$clip['type'] = (string) $media['type'];
$clip['id'] = (string) $media['id'];
$clip['track'] = (int) $clip_tag['track'];
// clips with negative tracks will have zero for start - we want to topmost clip's start
if ($clip['track'] < 0) {
$clip['start'] = MovieMasher_Coder_Decoder::nestedStart($clip_tag, $media);
if (!floatgtre($clip['start'], floatval(0))) {
continue;
}
} else {
$clip['start'] = floatval($clip_tag['start']);
}
$clip['start'] = $clip['start'] / $quantize;
$clip['length'] = floatval($clip_tag['length']) / $quantize;
$clip['stop'] = $clip['start'] + $clip['length'];
// duration of underlying audio/video clip, or zero
$clip['duration'] = floatval($media['duration']);
// speed defaults to one
$clip['speed'] = floatval($clip_tag['speed']);
if (!$clip['speed']) {
$clip['speed'] = floatval(1);
}
// loops defaults to one
$clip['loops'] = floatval($clip_tag['loops']);
if (!$clip['loops']) {
$clip['loops'] = floatval(1);
}
// will be 0.0 for all but trimmed audio/video
$clip['trimstart'] = floatval($clip_tag['trimstart']) / $quantize;
// URLs defaults to empty
$clip['source'] = '';
$clip['audio'] = '';
switch ($clip['type']) {
case 'image':
// so any reference in flash points to hi res source file
$url = (string) $media['source'];
$url = MovieMasher_Coder::cleanURL($url);
if ($url) {
$media['url'] = $url;
}
$clip['source'] = (string) $media['url'];
// intentional fallthrough to video
// intentional fallthrough to video
case 'video':
$clip['fill'] = (string) $clip_tag['fill'];
if (!$clip['fill']) {
$clip['fill'] = (string) $media['fill'];
}
if (!$clip['fill']) {
$clip['fill'] = 'stretch';
}
break;
}
$clip['audio'] = '';
switch ($clip['type']) {
case 'audio':
$audio = (string) $media['source'];
$audio = MovieMasher_Coder::cleanURL($audio);
if (empty($audio)) {
$audio = (string) $media['audio'];
}
if (!empty($audio)) {
// media has an audio url
$volume = (string) $clip_tag['volume'];
if (empty($volume) || $volume != '0,0,100,0') {
// clip has volume and is not muted
$url = absolute_url(end_with_slash($path), $audio);
$url = MovieMasher_Coder::cleanURL($url);
$result['cache_urls'][$url] = TRUE;
$result['has_audio'] = TRUE;
$clip['audio'] = $url;
$clip['volume'] = $volume;
}
}
break;
case 'effect':
$result['has_video'] = TRUE;
if ($clip['track'] < 0) {
// effect clip is attached to another clip or the mash itself
$parent_tag = MovieMasher_Coder_Decoder::parentTag($clip_tag);
if ($parent_tag == NULL) {
throw new UnexpectedValueException('Could not determine parent of effect');
}
if ($parent_tag->getName() == 'mash') {
$result['render_all'] = 1;
}
}
$render_clips[] = $clip;
break;
case 'theme':
if ($clip['track'] < 0) {
break;
}
// otherwise we're not composited, so fallthrough to transition
// otherwise we're not composited, so fallthrough to transition
case 'transition':
$render_clips[] = $clip;
// fallthrough to other visuals (image and video)
default:
$url = (string) $media['source'];
if (!$url) {
$url = (string) $media['url'];
}
$url = MovieMasher_Coder::cleanURL($url);
if ($url) {
if (file_extension($url) == 'youtube') {
throw new UnexpectedValueException('YouTube video decoding unsupported: ' . substr($url, 0, -8));
}
$url = absolute_url(end_with_slash($path), $url);
$clip['source'] = $url;
}
$result['has_video'] = TRUE;
$shifted = !floatcmp($clip['speed'], floatval(1));
// check for audio=0 in clip tag (composited video with no audio)
$audio = (string) $clip_tag['audio'];
if ($audio !== '0') {
$audio = (string) $media['audio'];
if (!$shifted && !empty($audio)) {
// media has an audio url
$volume = (string) $clip_tag['volume'];
// make sure this isn't a composited visual
if (empty($volume) || $volume != '0,0,100,0') {
// clip has volume and is not muted
if (!$url) {
// '1' means to use the audio in the video file
if ($audio == '1') {
$url = (string) $media['url'];
} else {
$url = $audio;
}
}
if ($url) {
$url = absolute_url(end_with_slash($path), $url);
$url = MovieMasher_Coder::cleanURL($url);
$result['cache_urls'][$url] = TRUE;
$result['has_audio'] = TRUE;
$clip['audio'] = $url;
$clip['volume'] = $volume;
}
}
}
}
// at the moment, timeshifted video clips are handled in flash
if ($shifted && $clip['type'] == 'video') {
$render_clips[] = $clip;
}
}
$result['duration'] = floatmax($clip['stop'], $result['duration']);
$result['clips'][] = $clip;
}
usort($result['clips'], array('MovieMasher_Coder_Decoder', '__sortByStartTime'));
if (!empty($result['render_all'])) {
$result['timespans'][] = array(floatval(0), $result['duration']);
} else {
// determine timespans of all clips requiring flash rendering
$z = sizeof($render_clips);
for ($i = 0; $i < $z; $i++) {
$clip = $render_clips[$i];
$start = $clip['start'];
$stop = $clip['stop'];
$y = sizeof($result['timespans']);
for ($j = $y - 1; $j > -1; $j--) {
$spanstart = $result['timespans'][$j][0];
$spanstop = $result['timespans'][$j][1];
if (!(floatgtr($start, $spanstop) || floatgtr($spanstart, $stop))) {
// they touch or overlap, so remove and expand
$start = floatmin($start, $spanstart);
$stop = floatmax($stop, $spanstop);
array_splice($result['timespans'], $j, 1);
}
}
$result['timespans'][] = array($start, $stop);
}
usort($result['timespans'], 'floatsort');
if (sizeof($result['timespans']) == 1) {
if ($result['timespans'][0][0] == floatval(0) && $result['timespans'][0][1] == $result['duration']) {
$result['render_all'] = 1;
}
}
}
$z = sizeof($result['timespans']);
$result['timespan_frame_count'] = 0;
$result['timespan_frame_index'] = 0;
$result['timespan_index'] = 0;
if ($z) {
$done = array();
// initialize timespans and alter media tags
$float_fps = floatval($fps);
for ($i = 0; $i < $z; $i++) {
$span =& $result['timespans'][$i];
// save frame for times, as convenience
$span[2] = intval(floor($span[0] * $float_fps));
$span[3] = intval(floor($span[1] * $float_fps));
// create a frame counter for span
$span[4] = $span[2];
// add to global frame count
$result['timespan_frame_count'] += $span[3] - $span[2];
// update media tag of video clips within this range with higher resolution media
$clips = MovieMasher_Coder_Decoder::videoBetween($result['clips'], $span[0], $span[0] + $span[1]);
$y = sizeof($clips);
for ($j = 0; $j < $y; $j++) {
$clip =& $clips[$j];
if ($clip['type'] == 'video') {
$media_tag = $result['media'][$clip['id']];
$url = (string) $media_tag['source'];
if (!$url) {
$url = (string) $media_tag['url'];
}
$url = MovieMasher_Coder::cleanURL($url);
$ext = file_extension($url);
if ($ext) {
$url = absolute_url(end_with_slash($path), $url);
if (empty($done[$clip['id']])) {
$done[$clip['id']] = TRUE;
$media_tag['zeropadding'] = strlen(floor($float_fps * $clip['duration']));
$media_tag['pattern'] = '%.jpg';
$media_tag['fps'] = $fps;
$media_tag['source'] = $url;
$result['cache_urls'][$url] = TRUE;
}
$clip['encode'] = TRUE;
}
}
}
}
}
return $result;
}
