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/*jshint node:true*/
'use strict';
var utils = require('../utils');
/*
*! Input-related methods
*/
module.exports = function(proto) {
/**
* Add an input to command
*
* Also switches "current input", that is the input that will be affected
* by subsequent input-related methods.
*
* Note: only one stream input is supported for now.
*
* @method FfmpegCommand#input
* @category Input
* @aliases mergeAdd,addInput
*
* @param {String|Readable} source input file path or readable stream
* @return FfmpegCommand
*/
proto.mergeAdd =
proto.addInput =
proto.input = function(source) {
var isFile = false;
var isStream = false;
if (typeof source !== 'string') {
if (!('readable' in source) || !(source.readable)) {
throw new Error('Invalid input');
}
var hasInputStream = this._inputs.some(function(input) {
return input.isStream;
});
if (hasInputStream) {
throw new Error('Only one input stream is supported');
}
isStream = true;
source.pause();
} else {
var protocol = source.match(/^([a-z]{2,}):/i);
isFile = !protocol || protocol[0] === 'file';
}
this._inputs.push(this._currentInput = {
source: source,
isFile: isFile,
isStream: isStream,
options: utils.args()
});
return this;
};
/**
* Specify input format for the last specified input
*
* @method FfmpegCommand#inputFormat
* @category Input
* @aliases withInputFormat,fromFormat
*
* @param {String} format input format
* @return FfmpegCommand
*/
proto.withInputFormat =
proto.inputFormat =
proto.fromFormat = function(format) {
if (!this._currentInput) {
throw new Error('No input specified');
}
this._currentInput.options('-f', format);
return this;
};
/**
* Specify input FPS for the last specified input
* (only valid for raw video formats)
*
* @method FfmpegCommand#inputFps
* @category Input
* @aliases withInputFps,withInputFPS,withFpsInput,withFPSInput,inputFPS,inputFps,fpsInput
*
* @param {Number} fps input FPS
* @return FfmpegCommand
*/
proto.withInputFps =
proto.withInputFPS =
proto.withFpsInput =
proto.withFPSInput =
proto.inputFPS =
proto.inputFps =
proto.fpsInput =
proto.FPSInput = function(fps) {
if (!this._currentInput) {
throw new Error('No input specified');
}
this._currentInput.options('-r', fps);
return this;
};
/**
* Use native framerate for the last specified input
*
* @method FfmpegCommand#native
* @category Input
* @aliases nativeFramerate,withNativeFramerate
*
* @return FfmmegCommand
*/
proto.nativeFramerate =
proto.withNativeFramerate =
proto.native = function() {
if (!this._currentInput) {
throw new Error('No input specified');
}
this._currentInput.options('-re');
return this;
};
/**
* Specify input seek time for the last specified input
*
* @method FfmpegCommand#seekInput
* @category Input
* @aliases setStartTime,seekTo
*
* @param {String|Number} seek seek time in seconds or as a '[hh:[mm:]]ss[.xxx]' string
* @return FfmpegCommand
*/
proto.setStartTime =
proto.seekInput = function(seek) {
if (!this._currentInput) {
throw new Error('No input specified');
}
this._currentInput.options('-ss', seek);
return this;
};
/**
* Loop over the last specified input
*
* @method FfmpegCommand#loop
* @category Input
*
* @param {String|Number} [duration] loop duration in seconds or as a '[[hh:]mm:]ss[.xxx]' string
* @return FfmpegCommand
*/
proto.loop = function(duration) {
if (!this._currentInput) {
throw new Error('No input specified');
}
this._currentInput.options('-loop', '1');
if (typeof duration !== 'undefined') {
this.duration(duration);
}
return this;
};
};
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