uploading works, but AV info is not automatically detected and video activation featu...

[living-lab-site.git] / application / helpers / video_helper.php

diff --git a/application/helpers/video_helper.php b/application/helpers/video_helper.php
index b845898..67ede1a 100644 (file)
--- a/application/helpers/video_helper.php
+++ b/application/helpers/video_helper.php
@@ -117,8 +117,77 @@ function get_av_info($file_name)
 {
        // TODO use ffprobe to return width, height, DAR, duration and size of a video
        
-       return array('width'=> 800, 'height'=> 600, 'dar'=> '16:9',
-                       'duration'=> '00:10', 'size'=> 1101693);
+       return array('width'=> 1440, 'height'=> 1080, 'dar'=> '16:9',
+                       'duration'=> '00:10', 'size'=> 5568748);
+}
+
+/**
+ * Return a dictionary with formats compliant for DB and CIS and computes
+ * resolutions such that an uploaded video will not be converted to a higher
+ * resolution.
+ * 
+ * @param type $formats formats as in content_ingestion config file
+ * @param type $av_info structure as returned by get_av_info function from this
+ * helper
+ * @param type $elim_dupl_res eliminate consecutive formats with the same
+ * resolution
+ * @return array a dictionary with DB format at key 'db_formats' and CIS format
+ * at key 'transcode_configs' 
+ */
+function prepare_formats($formats, $av_info, $elim_dupl_res=FALSE)
+{
+       $transcode_configs = array();
+       $db_formats = array();
+       
+       for ($i = 0; $i < count($formats); $i++)
+       {
+               $transcode_configs[$i]['container'] = $formats[$i]['container'];
+               $transcode_configs[$i]['extension'] = $formats[$i]['extension'];
+               $db_formats[$i]['ext'] = $formats[$i]['extension'];
+               $transcode_configs[$i]['a_codec'] = $formats[$i]['audio_codec'];
+               $transcode_configs[$i]['a_bitrate'] = $formats[$i]['audio_bit_rate'];
+               $transcode_configs[$i]['a_samplingrate'] = $formats[$i]['audio_sampling_rate'];
+               $transcode_configs[$i]['a_channels'] = $formats[$i]['audio_channels'];
+               $transcode_configs[$i]['v_codec'] = $formats[$i]['video_codec'];
+               $transcode_configs[$i]['v_bitrate'] = $formats[$i]['video_bit_rate'];
+               $transcode_configs[$i]['v_framerate'] = $formats[$i]['video_frame_rate'];
+               $transcode_configs[$i]['v_dar'] = $av_info['dar'];
+               $db_formats[$i]['dar'] = $av_info['dar'];
+
+               $sar = $av_info['width'] / $av_info['height'];
+               
+               if ($av_info['height'] < $formats[$i]['video_height'])
+               {
+                       $width = $av_info['width'];
+                       $height = $av_info['height'];
+               }
+               else
+               {
+                       $height = $formats[$i]['video_height'];
+                       $width = round($sar * $height);
+               }
+               
+               $transcode_configs[$i]['v_resolution'] = "${width}x${height}";
+               $db_formats[$i]['res'] = "${width}x${height}";
+       }
+       
+       // Eliminate formats with duplicate resolutions.
+       if ($elim_dupl_res)
+       {
+               for ($i = 1; $i < count($transcode_configs); $i++)
+               {
+                       if ($transcode_configs[$i]['v_resolution']
+                                       === $transcode_configs[$i - 1]['v_resolution'])
+                       {
+                               unset($transcode_configs[$i - 1]);
+                               unset($db_formats[$i - 1]);
+                               $i--;
+                       }
+               }
+       }
+       
+       return array('transcode_configs'=>$transcode_configs,
+               'db_formats'=>$db_formats);
 }
 
 /* End of file video_helper.php */