背景
2G网络，让人们能够通过手机上网；
3G网络，促使移动互联网飞速发展；
4G网络，直播和短视频出现爆发式增长。
Chaplin项目
演示
设计
循环模板
（2）大大降低了模板文件大小，使模板文件下载更快。
（2）让播放器支持循环配置。
o播放控制操作队列
多轨播放
PS：加载资源或者合成慢了就会出现播放卡顿，所以做了资源预加载，纹理预处理等操作。
模板协议
{
"name":"放大",
"type":"image",
"duration":2.0,
"shader":{
"vertexURL":"https://xianyu-chaplin-bucket.oss-cn-beijing.aliyuncs.com/ShaderV2/ImageEffect_Move2_V2/ImageEffect_Move2_V2.vert",
"fragmentURL":"https://xianyu-chaplin-bucket.oss-cn-beijing.aliyuncs.com/ShaderV2/ImageEffect_Move2_V2/ImageEffect_Move2_V2.frag",
"uniforms":{
"u_FirstScaleBegin":1.00,
"u_FirstScaleRange":0.04,
"u_FirstMoveBeginX":0.00,
"u_FirstMoveRangeX":0.00,
"u_FirstMoveBeginY":0.00,
"u_FirstMoveRangeY":0.00
}
}
}{
"name":"溶解",
"type":"transition",
"duration":0.5,
"shader":{
"vertexURL":"https://xianyu-chaplin-bucket.oss-cn-beijing.aliyuncs.com/ShaderV2/TransitionEffect_Mix2_V2/TransitionEffect_Mix2_V2.vert",
"fragmentURL":"https://xianyu-chaplin-bucket.oss-cn-beijing.aliyuncs.com/ShaderV2/TransitionEffect_Mix2_V2/TransitionEffect_Mix2_V2.frag",
"uniforms":{
"u_FirstScaleBegin":1.04,
"u_FirstScaleRange":0.01,
"u_SecondScaleBegin":1.00,
"u_SecondScaleRange":0.01,
"u_FirstMoveBeginX":0.00,
"u_FirstMoveRangeX":0.00,
"u_FirstMoveBeginY":0.00,
"u_FirstMoveRangeY":0.00,
"u_SecondMoveBeginX":0.00,
"u_SecondMoveRangeX":0.00,
"u_SecondMoveBeginY":0.00,
"u_SecondMoveRangeY":0.00
}
}
}
"tracks":[
{
"type":"ShaderTrack",
"list":[
{
"type":"PopImage",
"position":0,
"duration":3600,
"data":{
},
"shader":{
"vertexURL":"https://xianyu-chaplin-bucket.oss-cn-beijing.aliyuncs.com/ShaderV3/PopImage/PopImageV3.vert",
"fragmentURL":"https://xianyu-chaplin-bucket.oss-cn-beijing.aliyuncs.com/ShaderV3/PopImage/PopImageV3.frag",
"vertexCoordinatesName":"a_Position",
"vertexCoordinatesValue":{
"x":0,
"y":0,
"width":1,
"height":1,
"rect":{
"top":"8dp",
"right":"8dp",
"width":"60dp",
"height":"24dp"
}
},
"images":[
{
"textureCoordinatesName":"a_FirstTexCoord",
"textureCoordinatesValue":{
"x":0,
"y":0,
"width":1,
"height":1
},
"textureName":"u_FirstTexture",
"imageURL":"https://gw.alicdn.com/tfs/TB1QOt3nIVl614jSZKPXXaGjpXa-120-48.png"
}
],
"uniforms":{
"u_MoveX":0,
"u_MoveY":0,
"u_VertexScaleBegin":1,
"u_VertexScaleRange":0
}
}
}
]
}
]