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| package {
import flash.display.BitmapData;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.media.Camera;
import flash.media.Video;
import flash.net.NetConnection;
import flash.net.NetStream;
import flash.net.NetStreamAppendBytesAction;
import flash.net.Responder;
import flash.text.TextField;
import flash.text.TextFieldAutoSize;
import flash.text.TextFormat;
/**
* @author BECKER Christophe
*/
public class Main extends Sprite {
//
public var vid : Video;
public var cam : Camera;
public var bt : Sprite;
public var txt : TextField ;
//
public var boucle : int;
public var flv_writer : FlvWriter;
//
public var nc : NetConnection;
public var responder : Responder;
//
public function Main() {
cam = Camera.getCamera();
cam.setMode(640, 480, 15);
bt = new Sprite();
var sh : Shape = new Shape();
sh.graphics.beginFill(0x000000);
sh.graphics.drawRect(0, 0, 640, 20);
sh.graphics.endFill();
bt.addChild(sh);
var txtFormat : TextFormat = new TextFormat();
txtFormat.color = 0xffffff;
txt = new TextField();
txt.defaultTextFormat = txtFormat;
txt.text = 'click me for start video recorer';
txt.autoSize = TextFieldAutoSize.LEFT;
txt.selectable = false;
txt.x = (sh.width / 2) - (txt.width / 2);
bt.addChild(txt);
bt.y = 0;
bt.addEventListener(MouseEvent.CLICK, run);
addChild(bt);
vid = new Video(cam.width, cam.height);
vid.attachCamera(cam);
vid.y = 30;
addChild(vid);
}
private function run(e : MouseEvent) : void {
flv_writer = FlvWriter.getInstance();
flv_writer.createFile(cam.width, cam.height, 5);
bt.removeEventListener(MouseEvent.CLICK, run);
txt.text = 'recording';
txt.x = (bt.width / 2) - (txt.width / 2);
this.addEventListener(Event.ENTER_FRAME, add_image);
}
private function add_image(e : Event) : void {
if (!cam.muted) {
trace("add_image");
boucle++;
if (boucle == 25) {
this.removeEventListener(Event.ENTER_FRAME, add_image);
nc = new NetConnection();
nc.connect(null);
var ns : NetStream = new NetStream(nc);
ns = new NetStream(nc);
ns.client = {};
ns.client.onMetaData = metaDataHandler;
vid.attachNetStream(ns);
ns.play(null);
ns.appendBytesAction(NetStreamAppendBytesAction.RESET_BEGIN);
ns.appendBytes(flv_writer.byte);
} else {
add_picture();
}
}
}
private function metaDataHandler(meta : Object) : void {
if (vid) {
vid.width = meta.width;
vid.height = meta.height;
}
}
public function add_picture() : void {
var img : BitmapData = new BitmapData(cam.width, cam.height);
img.draw(vid);
flv_writer.image = img;
}
}
}
import flash.display.BitmapData;
import flash.utils.ByteArray;
/*
SimpleFlvWriter.as
Lee Felarca
http://www.zeropointnine.com/blog
5-2007
v0.8
Singleton class to create uncompressed FLV files.
Does not handle audio. Feel free to extend.
Source code licensed under a Creative Commons Attribution 3.0 License.
http://creativecommo...icenses/by/3.0/
Some Rights Reserved.
EXAMPLE USAGE:
var myWriter:SimpleFlvWriter = SimpleFlvWriter.getInstance();
myWriter.createFile(myFile, 320,240, 30, 120);
myWriter.saveFrame( myBitmapData1 );
myWriter.saveFrame( myBitmapData2 );
myWriter.saveFrame( myBitmapData3 ); // etc.
myWriter.closeFile();
*/
class FlvWriter {
static private var _instance : FlvWriter;
private var frameWidth : int = 320;
private var frameHeight : int = 240;
private var frameRate : Number = 15;
private var duration : Number = 10;
private const blockWidth : int = 32;
private const blockHeight : int = 32;
private var previousTagSize : uint = 0;
private var iteration : int = 0;
private var bmp : BitmapData;
//
private var out : ByteArray;
public static function getInstance() : FlvWriter {
if (FlvWriter._instance == null)
FlvWriter._instance = new FlvWriter(new SingletonEnforcer());
return FlvWriter._instance;
}
public function FlvWriter(singletonEnforcer : SingletonEnforcer) {
out = new ByteArray();
}
public function createFile(pWidth : int, pHeight : int, pFramesPerSecond : Number, pDurationInSeconds : Number = 0) : void {
frameWidth = pWidth;
frameHeight = pHeight;
frameRate = pFramesPerSecond;
duration = pDurationInSeconds;
out.writeBytes(header());
// create metadata tag
out.writeUnsignedInt(previousTagSize);
out.writeBytes(flvTagOnMetaData());
}
public function set image(pBitmapData : BitmapData) : void {
// bitmap dimensions should of course match parameters passed to createFile()
bmp = pBitmapData;
out.writeUnsignedInt(previousTagSize);
out.writeBytes(flvTagVideo());
}
public function get byte() : ByteArray {
return out;
}
private function header() : ByteArray {
var ba : ByteArray = new ByteArray();
ba.writeByte(0x46);
// 'F'
ba.writeByte(0x4C);
// 'L'
ba.writeByte(0x56);
// 'V'
ba.writeByte(0x01);
// Version 1
ba.writeByte(0x01);
// misc flags - video stream only
ba.writeUnsignedInt(0x09);
// header length
return ba;
}
private function flvTagVideo() : ByteArray {
var tag : ByteArray = new ByteArray();
var dat : ByteArray = videoData();
var timeStamp : uint = uint(1000 / frameRate * iteration++);
// tag 'header'
tag.writeByte(0x09);
// tagType = video
writeUI24(tag, dat.length);
// data size
writeUI24(tag, timeStamp);
// timestamp in ms
tag.writeByte(0);
// timestamp extended, not using ***
writeUI24(tag, 0);
// streamID always 0
// videodata
tag.writeBytes(dat);
previousTagSize = tag.length;
return tag;
}
private function videoData() : ByteArray {
var v : ByteArray = new ByteArray;
// VIDEODATA 'header'
v.writeByte(0x13);
// frametype (1) + codecid (3)
// SCREENVIDEOPACKET 'header'
// blockwidth/16-1 (4bits) + imagewidth (12bits)
writeUI4_12(v, int(blockWidth / 16) - 1, frameWidth);
// blockheight/16-1 (4bits) + imageheight (12bits)
writeUI4_12(v, int(blockHeight / 16) - 1, frameHeight);
// VIDEODATA > SCREENVIDEOPACKET > IMAGEBLOCKS:
var yMax : int = int(frameHeight / blockHeight);
var yRemainder : int = frameHeight % blockHeight;
if (yRemainder > 0) yMax += 1;
var xMax : int = int(frameWidth / blockWidth);
var xRemainder : int = frameWidth % blockWidth;
if (xRemainder > 0) xMax += 1;
for (var y1 : int = 0;y1 < yMax; y1++) {
for (var x1 : int = 0;x1 < xMax; x1++) {
// create block
var block : ByteArray = new ByteArray();
var yLimit : int = blockHeight;
if (yRemainder > 0 && y1 + 1 == yMax) yLimit = yRemainder;
for (var y2 : int = 0;y2 < yLimit; y2++) {
var xLimit : int = blockWidth;
if (xRemainder > 0 && x1 + 1 == xMax) xLimit = xRemainder;
for (var x2 : int = 0;x2 < xLimit; x2++) {
var px : int = (x1 * blockWidth) + x2;
var py : int = frameHeight - ((y1 * blockHeight) + y2);
// (flv's save from bottom to top)
var p : uint = bmp.getPixel(px, py);
block.writeByte(p & 0xff);
// blue
block.writeByte(p >> 8 & 0xff);
// green
block.writeByte(p >> 16);
// red
}
}
block.compress();
writeUI16(v, block.length);
// write block length (UI16)
v.writeBytes(block);
// write block
}
}
return v;
}
private function flvTagOnMetaData() : ByteArray {
var tag : ByteArray = new ByteArray();
var dat : ByteArray = metaData();
// tag 'header'
tag.writeByte(18);
// tagType = script data
writeUI24(tag, dat.length);
// data size
writeUI24(tag, 0);
// timestamp should be 0 for onMetaData tag
tag.writeByte(0);
// timestamp extended
writeUI24(tag, 0);
// streamID always 0
// data tag
tag.writeBytes(dat);
previousTagSize = tag.length;
return tag;
}
private function metaData() : ByteArray {
// onMetaData info goes in a ScriptDataObject of data type 'ECMA Array'
var b : ByteArray = new ByteArray();
// ObjectNameType (always 2)
b.writeByte(2);
// ObjectName (type SCRIPTDATASTRING):
writeUI16(b, "onMetaData".length);
// StringLength
b.writeUTFBytes("onMetaData");
// StringData
// ObjectData (type SCRIPTDATAVALUE):
b.writeByte(8);
// Type (ECMA array = 8)
b.writeUnsignedInt(7);
// // Elements in array
// SCRIPTDATAVARIABLES...
if (duration > 0) {
writeUI16(b, "duration".length);
b.writeUTFBytes("duration");
b.writeByte(0);
b.writeDouble(duration);
}
writeUI16(b, "width".length);
b.writeUTFBytes("width");
b.writeByte(0);
b.writeDouble(frameWidth);
writeUI16(b, "height".length);
b.writeUTFBytes("height");
b.writeByte(0);
b.writeDouble(frameHeight);
writeUI16(b, "framerate".length);
b.writeUTFBytes("framerate");
b.writeByte(0);
b.writeDouble(frameRate);
writeUI16(b, "videocodecid".length);
b.writeUTFBytes("videocodecid");
b.writeByte(0);
b.writeDouble(3);
// 'Screen Video' = 3
writeUI16(b, "canSeekToEnd".length);
b.writeUTFBytes("canSeekToEnd");
b.writeByte(1);
b.writeByte(int(true));
var mdc : String = "SimpleFLVWriter.as v0.8 zeropointnine.com";
writeUI16(b, "metadatacreator".length);
b.writeUTFBytes("metadatacreator");
b.writeByte(2);
writeUI16(b, mdc.length);
b.writeUTFBytes(mdc);
// VariableEndMarker1 (type UI24 - always 9)
writeUI24(b, 9);
return b;
}
private function writeUI24(stream : *, p : uint) : void {
var byte1 : int = p >> 16;
var byte2 : int = p >> 8 & 0xff;
var byte3 : int = p & 0xff;
stream.writeByte(byte1);
stream.writeByte(byte2);
stream.writeByte(byte3);
}
private function writeUI16(stream : *, p : uint) : void {
stream.writeByte(p >> 8);
stream.writeByte(p & 0xff);
}
private function writeUI4_12(stream : *, p1 : uint, p2 : uint) : void {
// writes a 4-bit value followed by a 12-bit value in two sequential bytes
var byte1a : int = p1 << 4;
var byte1b : int = p2 >> 8;
var byte1 : int = byte1a + byte1b;
var byte2 : int = p2 & 0xff;
stream.writeByte(byte1);
stream.writeByte(byte2);
}
}
class SingletonEnforcer {
}
/*
FLV structure summary:
header
previoustagsize
flvtag
[info]
videodata
[info]
screenvideopacket
[info]
imageblocks
imageblocks
...
previoustagsize
flvtag
...
FLV file format:
header
last tag size
FLVTAG:
tagtype
datasize
timestamp
timestampextended
streamid
data [VIDEODATA]:
frametype
codecid
videodata [SCREENVIDEOPACKET]:
blockwidth ub[4]
imagewidth ub[12]
blockheight ub[4]
imageheight ub[12]
imageblocks [IMAGEBLOCKS[]]:
datasize ub[16] <same as 'ub16', i think>
data..
last tag size
FLVTAG
etc.
*/ |
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