test and added help

src/php_top/raw.php

 <?php
 
+$help = <<<HELP
+Description:
+  This script gets raw pixel data from sensors. It does 2 things:
+  * captures raw data (controls the videomem driver to copy data from fpga memory to the system memory)
+  * transfers captured data over network
+
+  It can capture images for multiple ports at a time, but downloads only a single image.
+
+Parameters:
+  cmd - (run|get)
+        run - captures
+        get  - prints out raw data
+  port - 4-bit mask for sensor ports
+
+Usage examples:
+  1. For ports 0 and 1:
+     // capture
+     http://{$_SERVER['SERVER_ADDR']}/raw.php?cmd=run&ports=0x3
+     // download
+     http://{$_SERVER['SERVER_ADDR']}/raw.php?cmd=get&ports=0x1
+     http://{$_SERVER['SERVER_ADDR']}/raw.php?cmd=get&ports=0x2
+HELP;
+
+
 $BUF_SIZE = 4096;
-$VPATH = "/sys/devices/soc0/elphel393-videomem@0"
-$MEM_PRE     = "$VPATH/membridge_start"
-$VFRAME_PRE  = "$VPATH/video_frame_number"
-$RAWINFO_PRE = "$VPATH/raw_frame_info"
+$VPATH = "/sys/devices/soc0/elphel393-videomem@0";
+$MEM_PRE     = "$VPATH/membridge_start";
+$VFRAME_PRE  = "$VPATH/video_frame_number";
+$RAWINFO_PRE = "$VPATH/raw_frame_info";
 
 if (isset($argv[1])){
-  $_GET['sensor_port'] = $argv[1];
+  $_GET['cmd'] = $argv[1];
+}
+
+if (isset($argv[2])){
+  $_GET['ports'] = $argv[2];
+}
+
+if (isset($_GET['cmd'])){
+  $cmd = $_GET['cmd'];
+}else{
+  $cmd = "donothing";
 }
 
-if (isset($_GET['sensor_port'])){
-  $sensor_port = $_GET['sensor_port'];
+// ports are set by bitmask
+// bit 0..3 - port 0..3
+// 3 = 0x3  - sets ports 0 and 1
+// 12 = 0xc - sets ports 2 and 3
+if (isset($_GET['ports'])){
+  $sensor_ports = $_GET['ports'];
 }else{
-  $sensor_port = 0;
+  $sensor_ports = 0;
 }
 
-// get master
-$frame_num = elphel_get_frame($sensor_port);
+$sensor_ports = hexdec($sensor_ports);
+
+//parse $sensor_ports
+$ports = array();
+
+// store each index
+for($i=0;$i<4;$i++){
+  if (($sensor_ports&(0x1<<$i))>>$i){
+    array_push($ports,$i);
+  }
+}
+
+// setup and copy membridge data
+if($cmd=="run"){
+
+  print("<pre>\n");
+  print("Ports requested: ".implode(",",$ports)."\n");
+
+  // get master
+  $frame_num = elphel_get_frame($ports[0]);
+  print("Frame number at the time of request: ".$frame_num."\n");
+
+  $master_port = elphel_get_P_value($ports[0],ELPHEL_TRIG_MASTER,0);
+
+  // STEP 1: set size
+  for($i=0;$i<count($ports);$i++){
+      set_buf_size($ports[$i],$BUF_SIZE);
+  }
+
+  // STEP 2: run
+  for($i=0;$i<count($ports);$i++){
+    // second argument: 0 or 1 - location in video buffer
+    set_vbuf_position($ports[$i],0);
+    // waiting for frame is built-in in the driver
+    copy_vbuf_to_sbuf($ports[$i],$frame_num+1);
+  }
+
+  // Print links here
+  print("\nDownload:");
+  for($i=0;$i<count($ports);$i++){
+    $tmpval = dechex(pow(2,$ports[$i]));
+    echo " <a target=\"_blank\" href=\"?cmd=get&ports=0x{$tmpval}\">raw {$ports[$i]}</a>";
+  }
+  print("\n");
 
-$master_port = elphel_get_P_value($sensor_port,ELPHEL_TRIG_MASTER)),0);
+  // Print image data from sysfs
+  print("\nDebug info:\n\n");
+  for($i=0;$i<count($ports);$i++){
+    $data = file_get_contents("{$RAWINFO_PRE}{$ports[$i]}");
 
-set_buf_size($sensor_port,$BUF_SIZE);
-set_vbuf_position($sensor_port,0);
-// waiting for frame is built-in in the driver
-copy_vbuf_to_sbuf($sensor_port,$frame_num+1);
+    echo "  port {$ports[$i]}:\n";
+    echo "    ".implode("\n    ",explode("\n",$data));
+
+    $id = parse_sysfs_data($data);
+    $raw_size = $id['fullwidth']*$id['height']*$id['bpp']/8;
+
+    echo "Actual raw image size is $raw_size bytes\n";
+  }
+
+  print("OK\n");
+}
+
+// download raw data
+if($cmd=="get"){
+  // assuming $ports has only one element
+  $data = file_get_contents("{$RAWINFO_PRE}{$ports[0]}");
+  //get data from sysfs
+  $id = parse_sysfs_data($data);
+
+  $raw_size = $id['fullwidth']*$id['height']*$id['bpp']/8;
+
+  // send headers like filename and size?
+
+  // get data here
+  $raw_data = file_get_contents("/dev/image_raw{$ports[0]}", NULL, NULL, 0, $raw_size);
+
+  header("Content-Type: application/octet-stream");
+  header('Content-Disposition: attachment; '.'filename="port'.$ports[0].'.raw"');
+  header("Content-Length: ".$raw_size."\n");
+  header("Pragma: no-cache\n");
+
+  echo $raw_data;
+}
+
+if($cmd=="donothing"){
+  print("<pre>");
+  echo $help;
+}
+
+die();
 
 // read frame parameters from sysfs
 // echo short header
 // echo pixels
 
 function set_buf_size($sensor_port,$size){
-  exec("echo $size > /sys/devices/soc0/elphel393-mem@0/buffer_pages_raw_chn$sensor_port");
+  //exec("echo $size > /sys/devices/soc0/elphel393-mem@0/buffer_pages_raw_chn$sensor_port");
+  file_put_contents("/sys/devices/soc0/elphel393-mem@0/buffer_pages_raw_chn$sensor_port",$size);
 }
 
 function set_vbuf_position($sensor_port,$pos){
-  global $VRAME_PRE;
-  exec("echo $pos > {$VFRAME_PRE}{$sensor_port}");
+  global $VFRAME_PRE;
+  //exec("echo $pos > {$VFRAME_PRE}");
+  file_put_contents($VFRAME_PRE,$pos);
 }
 
-function copy_vbuf_to_sbuf($port,$frame_num){
-  global $MEM_PRE
-  exec("echo $frame_num > {$MEM_PRE}{$sensor_port}");
+function copy_vbuf_to_sbuf($sensor_port,$frame_num){
+  global $MEM_PRE;
+  //exec("echo $frame_num > {$MEM_PRE}{$sensor_port}");
+  file_put_contents($MEM_PRE.$sensor_port,$frame_num);
+}
+
+function parse_sysfs_data($data){
+
+  $res = array(
+    'fullwidth' => 0,
+    'width' => 0,
+    'height' => 0,
+    'bpp' => 0
+  );
+
+  $lines = explode("\n",$data);
+  foreach($lines as $line){
+    $pv = explode("=",$line);
+    if (count($pv)==2){
+      $name = trim($pv[0]);
+      $value = trim($pv[1]);
+      switch($name){
+        case "fullwidth":
+          $res['fullwidth']=intval($value);
+        break;
+        case "width":
+          $res['width']=intval($value);
+        break;
+        case "height":
+          $res['height']=intval($value);
+        break;
+        case "bits per pixel":
+          $res['bpp']=intval($value);
+        break;
+      }
+    }
+  }
+
+  return $res;
 }
 
 ?>