public function get_chunk()
{
$chunk = null;
if (!$this->is_init) {
$this->init_channel_songs();
}
if ($this->is_init) {
// Move to next song
while ($this->media == null && ($this->random || $this->song_pos < count($this->songs))) {
if ($this->random) {
$randsongs = $this->playlist->get_random_items(1);
$this->media = new Song($randsongs[0]['object_id']);
} else {
$this->media = new Song($this->songs[$this->song_pos]);
}
$this->media->format();
if ($this->media->catalog) {
$catalog = Catalog::create_from_id($this->media->catalog);
if (make_bool($this->media->enabled)) {
if (AmpConfig::get('lock_songs')) {
if (!Stream::check_lock_media($this->media->id, 'song')) {
debug_event('channel', 'Media ' . $this->media->id . ' locked, skipped.', '3');
$this->media = null;
}
}
}
if ($this->media != null) {
$this->media = $catalog->prepare_media($this->media);
if (!$this->media->file || !Core::is_readable(Core::conv_lc_file($this->media->file))) {
debug_event('channel', 'Cannot read media ' . $this->media->id . ' file, skipped.', '3');
$this->media = null;
} else {
$valid_types = $this->media->get_stream_types();
if (!in_array('transcode', $valid_types)) {
debug_event('channel', 'Missing settings to transcode ' . $this->media->file . ', skipped.', '3');
$this->media = null;
} else {
debug_event('channel', 'Now listening to ' . $this->media->file . '.', '5');
}
}
}
} else {
debug_event('channel', 'Media ' . $this->media->id . ' doesn\'t have catalog, skipped.', '3');
$this->media = null;
}
$this->song_pos++;
// Restart from beginning for next song if the channel is 'loop' enabled
// and load fresh data from database
if ($this->media != null && $this->song_pos == count($this->songs) && $this->loop) {
$this->init_channel_songs();
}
}
if ($this->media != null) {
// Stream not yet initialized for this media, start it
if (!$this->transcoder) {
$options = array('bitrate' => $this->bitrate);
$this->transcoder = Stream::start_transcode($this->media, $this->stream_type, null, $options);
$this->media_bytes_streamed = 0;
}
if (is_resource($this->transcoder['handle'])) {
if (ftell($this->transcoder['handle']) == 0) {
$this->header_chunk = '';
}
$chunk = fread($this->transcoder['handle'], $this->chunk_size);
$this->media_bytes_streamed += strlen($chunk);
if (ftell($this->transcoder['handle']) < 10000 && strtolower($this->stream_type) == "ogg" || $this->header_chunk_remainder) {
//debug_event('channel', 'File handle pointer: ' . ftell($this->transcoder['handle']) ,'5');
$clchunk = $chunk;
if ($this->header_chunk_remainder) {
$this->header_chunk .= substr($clchunk, 0, $this->header_chunk_remainder);
if (strlen($clchunk) >= $this->header_chunk_remainder) {
$clchunk = substr($clchunk, $this->header_chunk_remainder);
$this->header_chunk_remainder = 0;
} else {
$this->header_chunk_remainder = $this->header_chunk_remainder - strlen($clchunk);
$clchunk = '';
}
}
// see bin/channel_run.inc for explanation what's happening here
while ($this->strtohex(substr($clchunk, 0, 4)) == "4F676753") {
$hex = $this->strtohex(substr($clchunk, 0, 27));
$ogg_nr_of_segments = hexdec(substr($hex, 26 * 2, 2));
if (substr($clchunk, 27 + $ogg_nr_of_segments + 1, 6) == "vorbis" || substr($clchunk, 27 + $ogg_nr_of_segments, 4) == "Opus") {
$hex .= $this->strtohex(substr($clchunk, 27, $ogg_nr_of_segments));
$ogg_sum_segm_laces = 0;
for ($segm = 0; $segm < $ogg_nr_of_segments; $segm++) {
$ogg_sum_segm_laces += hexdec(substr($hex, 27 * 2 + $segm * 2, 2));
}
$this->header_chunk .= substr($clchunk, 0, 27 + $ogg_nr_of_segments + $ogg_sum_segm_laces);
if (strlen($clchunk) < 27 + $ogg_nr_of_segments + $ogg_sum_segm_laces) {
$this->header_chunk_remainder = (int) (27 + $ogg_nr_of_segments + $ogg_sum_segm_laces - strlen($clchunk));
}
$clchunk = substr($clchunk, 27 + $ogg_nr_of_segments + $ogg_sum_segm_laces);
} else {
//no more interesting headers
$clchunk = '';
}
}
}
//debug_event('channel', 'File handle pointer: ' . ftell($this->transcoder['handle']) ,'5');
//debug_event('channel', 'CHUNK : ' . $chunk, '5');
//debug_event('channel', 'Chunk size: ' . strlen($chunk) ,'5');
// End of file, prepare to move on for next call
if (feof($this->transcoder['handle'])) {
$this->media->set_played(-1, 'Ampache', array());
if (strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
fread($this->transcoder['stderr'], 4096);
fclose($this->transcoder['stderr']);
}
fclose($this->transcoder['handle']);
Stream::kill_process($this->transcoder);
$this->media = null;
$this->transcoder = null;
}
} else {
$this->media = null;
$this->transcoder = null;
}
if (!strlen($chunk)) {
$chunk = $this->get_chunk();
}
}
}
return $chunk;
}
print $buf;
if (ob_get_length()) {
ob_flush();
flush();
ob_end_flush();
}
ob_start();
}
}
$bytes_streamed += strlen($buf);
}
} while (!feof($fp) && connection_status() == 0 && ($transcode || $bytes_streamed < $stream_size));
}
if ($send_all_in_once && connection_status() == 0) {
header("Content-Length: " . strlen($buf_all));
print $buf_all;
ob_flush();
}
$real_bytes_streamed = $bytes_streamed;
// Need to make sure enough bytes were sent.
if ($bytes_streamed < $stream_size && connection_status() == 0) {
print str_repeat(' ', $stream_size - $bytes_streamed);
$bytes_streamed = $stream_size;
}
if ($transcode && isset($transcoder)) {
fclose($fp);
Stream::kill_process($transcoder);
} else {
fclose($fp);
}
debug_event('play', 'Stream ended at ' . $bytes_streamed . ' (' . $real_bytes_streamed . ') bytes out of ' . $stream_size, 5);
/**
* Get a song waveform.
* @param int $song_id
* @return binary|string|null
*/
public static function get($song_id)
{
$song = new Song($song_id);
$waveform = null;
if ($song->id) {
$song->format();
$waveform = $song->waveform;
if (!$waveform) {
$catalog = Catalog::create_from_id($song->catalog);
if ($catalog->get_type() == 'local') {
$transcode_to = 'wav';
$transcode_cfg = AmpConfig::get('transcode');
$valid_types = $song->get_stream_types();
if ($song->type != $transcode_to) {
$basedir = AmpConfig::get('tmp_dir_path');
if ($basedir) {
if ($transcode_cfg != 'never' && in_array('transcode', $valid_types)) {
$tmpfile = tempnam($basedir, $transcode_to);
$tfp = fopen($tmpfile, 'wb');
if (!is_resource($tfp)) {
debug_event('waveform', "Failed to open " . $tmpfile, 3);
return null;
}
$transcoder = Stream::start_transcode($song, $transcode_to);
$fp = $transcoder['handle'];
if (!is_resource($fp)) {
debug_event('waveform', "Failed to open " . $song->file . " for waveform.", 3);
return null;
}
do {
$buf = fread($fp, 2048);
fwrite($tfp, $buf);
} while (!feof($fp));
fclose($fp);
fclose($tfp);
Stream::kill_process($transcoder);
$waveform = self::create_waveform($tmpfile);
//$waveform = self::create_waveform("C:\\tmp\\test.wav");
@unlink($tmpfile);
} else {
debug_event('waveform', 'transcode setting to wav required for waveform.', '3');
}
} else {
debug_event('waveform', 'tmp_dir_path setting required for waveform.', '3');
}
} else {
$waveform = self::create_waveform($song->file);
}
}
if ($waveform) {
self::save_to_db($song_id, $waveform);
}
}
}
return $waveform;
}
