Features::get_item_features( int $target_item_id, int $tile_depth ): Avifinfo\Status

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$target_item_idint

Id of the item whose features will be bound.

$tile_depthint

Maximum recursion to search within tile-parent relations.

Return value

Avifinfo\Status

FOUND on success or NOT_FOUND on failure.

Performance profile

How much work a call to Features::get_item_features() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Light

Touches nothing outside its own arguments.

Scaling

Scales with input

The body loops, so the work grows with what you pass in.

Instructions

9–86

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 116.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What one call costs · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost Features::get_item_features() can have, taken from its control-flow graph on PHP 8.5.

Uses · 1

• \Avifinfo\Features::get_item_features()

Source code

View on Trac ↗View on GitHub ↗

130  private function get_item_features( $target_item_id, $tile_depth ) {131    foreach ( $this->props as $prop ) {132      if ( $prop->item_id != $target_item_id ) {133        continue;134      }135 136      // Retrieve the width and height of the primary item if not already done.137      if ( $target_item_id == $this->primary_item_id &&138           ( $this->primary_item_features['width'] == UNDEFINED ||139             $this->primary_item_features['height'] == UNDEFINED ) ) {140        foreach ( $this->dim_props as $dim_prop ) {141          if ( $dim_prop->property_index != $prop->property_index ) {142            continue;143          }144          $this->primary_item_features['width']  = $dim_prop->width;145          $this->primary_item_features['height'] = $dim_prop->height;146          if ( $this->primary_item_features['bit_depth'] != UNDEFINED &&147               $this->primary_item_features['num_channels'] != UNDEFINED ) {148            return FOUND;149          }150          break;151        }152      }153      // Retrieve the bit depth and number of channels of the target item if not154      // already done.155      if ( $this->primary_item_features['bit_depth'] == UNDEFINED ||156           $this->primary_item_features['num_channels'] == UNDEFINED ) {157        foreach ( $this->chan_props as $chan_prop ) {158          if ( $chan_prop->property_index != $prop->property_index ) {159            continue;160          }161          $this->primary_item_features['bit_depth']    = $chan_prop->bit_depth;162          $this->primary_item_features['num_channels'] = $chan_prop->num_channels;163          if ( $this->primary_item_features['width'] != UNDEFINED &&164              $this->primary_item_features['height'] != UNDEFINED ) {165            return FOUND;166          }167          break;168        }169      }170    }171 172    // Check for the bit_depth and num_channels in a tile if not yet found.173    if ( $tile_depth < 3 ) {174      foreach ( $this->tiles as $tile ) {175        if ( $tile->parent_item_id != $target_item_id ) {176          continue;177        }178        $status = $this->get_item_features( $tile->tile_item_id, $tile_depth + 1 );179        if ( $status != NOT_FOUND ) {180          return $status;181        }182      }183    }184    return NOT_FOUND;185  }

Changelog

Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

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