rtmp.js
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/**
* @file flash-rtmp.js
* @module flash-rtmp
*/
/**
* Add RTMP properties to the {@link Flash} Tech.
*
* @param {Flash} Flash
* The flash tech class.
*
* @mixin FlashRtmpDecorator
*
* @return {Flash}
* The flash tech with RTMP properties added.
*/
function FlashRtmpDecorator(Flash) {
Flash.streamingFormats = {
'rtmp/mp4': 'MP4',
'rtmp/flv': 'FLV'
};
/**
* Join connection and stream with an ampersand.
*
* @param {string} connection
* The connection string.
*
* @param {string} stream
* The stream string.
*
* @return {string}
* The connection and stream joined with an `&` character
*/
Flash.streamFromParts = function(connection, stream) {
return connection + '&' + stream;
};
/**
* The flash parts object that contains connection and stream info.
*
* @typedef {Object} Flash~PartsObject
*
* @property {string} connection
* The connection string of a source, defaults to an empty string.
*
* @property {string} stream
* The stream string of the source, defaults to an empty string.
*/
/**
* Convert a source url into a stream and connection parts.
*
* @param {string} src
* the source url
*
* @return {Flash~PartsObject}
* The parts object that contains a connection and a stream
*/
Flash.streamToParts = function(src) {
const parts = {
connection: '',
stream: ''
};
if (!src) {
return parts;
}
// Look for the normal URL separator we expect, '&'.
// If found, we split the URL into two pieces around the
// first '&'.
let connEnd = src.search(/&(?![\w-]+=)/);
let streamBegin;
if (connEnd !== -1) {
streamBegin = connEnd + 1;
} else {
// If there's not a '&', we use the last '/' as the delimiter.
connEnd = streamBegin = src.lastIndexOf('/') + 1;
if (connEnd === 0) {
// really, there's not a '/'?
connEnd = streamBegin = src.length;
}
}
parts.connection = src.substring(0, connEnd);
parts.stream = src.substring(streamBegin, src.length);
return parts;
};
/**
* Check if the source type is a streaming type.
*
* @param {string} srcType
* The mime type to check.
*
* @return {boolean}
* - True if the source type is a streaming type.
* - False if the source type is not a streaming type.
*/
Flash.isStreamingType = function(srcType) {
return srcType in Flash.streamingFormats;
};
// RTMP has four variations, any string starting
// with one of these protocols should be valid
/**
* Regular expression used to check if the source is an rtmp source.
*
* @property {RegExp} Flash.RTMP_RE
*/
Flash.RTMP_RE = /^rtmp[set]?:\/\//i;
/**
* Check if the source itself is a streaming type.
*
* @param {string} src
* The url to the source.
*
* @return {boolean}
* - True if the source url indicates that the source is streaming.
* - False if the shource url indicates that the source url is not streaming.
*/
Flash.isStreamingSrc = function(src) {
return Flash.RTMP_RE.test(src);
};
/**
* A source handler for RTMP urls
* @type {Object}
*/
Flash.rtmpSourceHandler = {};
/**
* Check if Flash can play the given mime type.
*
* @param {string} type
* The mime type to check
*
* @return {string}
* 'maybe', or '' (empty string)
*/
Flash.rtmpSourceHandler.canPlayType = function(type) {
if (Flash.isStreamingType(type)) {
return 'maybe';
}
return '';
};
/**
* Check if Flash can handle the source natively
*
* @param {Object} source
* The source object
*
* @param {Object} [options]
* The options passed to the tech
*
* @return {string}
* 'maybe', or '' (empty string)
*/
Flash.rtmpSourceHandler.canHandleSource = function(source, options) {
const can = Flash.rtmpSourceHandler.canPlayType(source.type);
if (can) {
return can;
}
if (Flash.isStreamingSrc(source.src)) {
return 'maybe';
}
return '';
};
/**
* Pass the source to the flash object.
*
* @param {Object} source
* The source object
*
* @param {Flash} tech
* The instance of the Flash tech
*
* @param {Object} [options]
* The options to pass to the source
*/
Flash.rtmpSourceHandler.handleSource = function(source, tech, options) {
const srcParts = Flash.streamToParts(source.src);
tech.setRtmpConnection(srcParts.connection);
tech.setRtmpStream(srcParts.stream);
};
// Register the native source handler
Flash.registerSourceHandler(Flash.rtmpSourceHandler);
return Flash;
}
export default FlashRtmpDecorator;