From 170ee55bd1f0858fdbad3147a72c0f185d49a9a6 Mon Sep 17 00:00:00 2001
From: zhangzengfei <zhangzengfei@smartai.com>
Date: 星期四, 10 三月 2022 11:02:01 +0800
Subject: [PATCH] cameraPlayer 添加h265b播放功能
---
src/components/wasmPlayer/wasm/pcm-player.js | 412 +++++++++++++++++++++++++++-------------------------------
1 files changed, 189 insertions(+), 223 deletions(-)
diff --git a/src/components/wasmPlayer/wasm/pcm-player.js b/src/components/wasmPlayer/wasm/pcm-player.js
index 2e71f7f..663cf62 100644
--- a/src/components/wasmPlayer/wasm/pcm-player.js
+++ b/src/components/wasmPlayer/wasm/pcm-player.js
@@ -1,227 +1,193 @@
-export function PCMPlayer(option)
-{
- this.init(option);
+export function PCMPlayer(option) {
+ this.init(option)
}
-PCMPlayer.prototype.init=function(option)
-{
- var defaults={
- encoding: '16bitInt',
- channels:1,
- sampleRate:8000,
- flushingTime:1000
- };
- this.option=Object.assign({},defaults,option);
- this.samples=new Float32Array();
- this.flush=this.flush.bind(this);
- this.interval=setInterval(this.flush,this.option.flushingTime);
- this.maxValue=this.getMaxValue();
- this.typedArray=this.getTypedArray();
- this.createContext();
-};
-
-PCMPlayer.prototype.getMaxValue=function()
-{
- var encodings={
- '8bitInt': 128,
- '16bitInt':32768,
- '32bitInt':2147483648,
- '32bitFloat':1
- }
-
- return encodings[this.option.encoding]?encodings[this.option.encoding]:encodings['16bitInt'];
-};
-
-PCMPlayer.prototype.getTypedArray=function()
-{
- var typedArrays={
- '8bitInt': Int8Array,
- '16bitInt':Int16Array,
- '32bitInt':Int32Array,
- '32bitFloat':Float32Array
- }
-
- return typedArrays[this.option.encoding]?typedArrays[this.option.encoding]:typedArrays['16bitInt'];
-};
-
-PCMPlayer.prototype.createContext=function()
-{
- this.audioCtx=new (window.AudioContext||window.webkitAudioContext)();
- this.gainNode=this.audioCtx.createGain();
- this.gainNode.gain.value=1;
- this.gainNode.connect(this.audioCtx.destination);
- this.startTime=this.audioCtx.currentTime;
-};
-
-PCMPlayer.prototype.isTypedArray=function(data)
-{
- return (data.byteLength&&data.buffer&&data.buffer.constructor==ArrayBuffer);
-};
-
-PCMPlayer.prototype.feed=function(data)
-{
- if(!this.isTypedArray(data)) return;
- data=this.getFormatedValue(data);
- var tmp=new Float32Array(this.samples.length+data.length);
- tmp.set(this.samples,0);
- tmp.set(data,this.samples.length);
- this.samples=tmp;
-};
-
-PCMPlayer.prototype.getFormatedValue=function(data)
-{
- var data=new this.typedArray(data.buffer),
- float32=new Float32Array(data.length),
- i;
-
- for(i=0; i<data.length; i++)
- {
- float32[i]=data[i]/this.maxValue;
- }
- return float32;
-};
-
-PCMPlayer.prototype.volume=function(volume)
-{
- this.gainNode.gain.value=volume;
-};
-
-PCMPlayer.prototype.destroy=function()
-{
- if(this.interval)
- {
- clearInterval(this.interval);
- }
- this.samples=null;
- this.audioCtx.close();
- this.audioCtx=null;
-};
-
-PCMPlayer.prototype.flush=function()
-{
- if(!this.samples.length) return;
- var bufferSource=this.audioCtx.createBufferSource(),
- length=this.samples.length/this.option.channels,
- audioBuffer=this.audioCtx.createBuffer(this.option.channels,length,this.option.sampleRate),
- audioData,
- channel,
- offset,
- i,
- decrement;
-
- for(channel=0; channel<this.option.channels; channel++)
- {
- audioData=audioBuffer.getChannelData(channel);
- offset=channel;
- decrement=50;
- for(i=0; i<length; i++)
- {
- audioData[i]=this.samples[offset];
- /* fadein */
- if(i<50)
- {
- audioData[i]=(audioData[i]*i)/50;
- }
- /* fadeout*/
- if(i>=(length-51))
- {
- audioData[i]=(audioData[i]*decrement--)/50;
- }
- offset+=this.option.channels;
- }
- }
-
- if(this.startTime<this.audioCtx.currentTime)
- {
- this.startTime=this.audioCtx.currentTime;
- }
- //console.log('start vs current '+this.startTime+' vs '+this.audioCtx.currentTime+' duration: '+audioBuffer.duration);
- bufferSource.buffer=audioBuffer;
- bufferSource.connect(this.gainNode);
- bufferSource.start(this.startTime);
- this.startTime+=audioBuffer.duration;
- this.samples=new Float32Array();
-};
-
-PCMPlayer.prototype.getTimestamp=function()
-{
- if(this.audioCtx)
- {
- return this.audioCtx.currentTime;
- }
- else
- {
- return 0;
- }
-};
-
-PCMPlayer.prototype.play=function(data)
-{
- if(!this.isTypedArray(data))
- {
- return;
- }
-
- data=this.getFormatedValue(data);
- if(!data.length)
- {
- return;
- }
-
- var bufferSource=this.audioCtx.createBufferSource(),
- length=data.length/this.option.channels,
- audioBuffer=this.audioCtx.createBuffer(this.option.channels,length,this.option.sampleRate),
- audioData,
- channel,
- offset,
- i,
- decrement;
-
- for(channel=0; channel<this.option.channels; channel++)
- {
- audioData=audioBuffer.getChannelData(channel);
- offset=channel;
- decrement=50;
- for(i=0; i<length; i++)
- {
- audioData[i]=data[offset];
- /* fadein */
- if(i<50)
- {
- audioData[i]=(audioData[i]*i)/50;
- }
- /* fadeout*/
- if(i>=(length-51))
- {
- audioData[i]=(audioData[i]*decrement--)/50;
- }
- offset+=this.option.channels;
- }
- }
-
- if(this.startTime<this.audioCtx.currentTime)
- {
- this.startTime=this.audioCtx.currentTime;
- }
- //console.log('start vs current '+this.startTime+' vs '+this.audioCtx.currentTime+' duration: '+audioBuffer.duration);
- bufferSource.buffer=audioBuffer;
- bufferSource.connect(this.gainNode);
- bufferSource.start(this.startTime);
- this.startTime+=audioBuffer.duration;
-};
-
-PCMPlayer.prototype.pause=function()
-{
- if(this.audioCtx.state==='running')
- {
- this.audioCtx.suspend()
- }
+PCMPlayer.prototype.init = function(option) {
+ var defaults = {
+ encoding: "16bitInt",
+ channels: 1,
+ sampleRate: 8000,
+ flushingTime: 1000
+ }
+ this.option = Object.assign({}, defaults, option)
+ this.samples = new Float32Array()
+ this.flush = this.flush.bind(this)
+ this.interval = setInterval(this.flush, this.option.flushingTime)
+ this.maxValue = this.getMaxValue()
+ this.typedArray = this.getTypedArray()
+ this.createContext()
}
-PCMPlayer.prototype.resume=function()
-{
- if(this.audioCtx.state==='suspended')
- {
- this.audioCtx.resume()
- }
-}
\ No newline at end of file
+PCMPlayer.prototype.getMaxValue = function() {
+ var encodings = {
+ "8bitInt": 128,
+ "16bitInt": 32768,
+ "32bitInt": 2147483648,
+ "32bitFloat": 1
+ }
+
+ return encodings[this.option.encoding] ? encodings[this.option.encoding] : encodings["16bitInt"]
+}
+
+PCMPlayer.prototype.getTypedArray = function() {
+ var typedArrays = {
+ "8bitInt": Int8Array,
+ "16bitInt": Int16Array,
+ "32bitInt": Int32Array,
+ "32bitFloat": Float32Array
+ }
+
+ return typedArrays[this.option.encoding] ? typedArrays[this.option.encoding] : typedArrays["16bitInt"]
+}
+
+PCMPlayer.prototype.createContext = function() {
+ this.audioCtx = new (window.AudioContext || window.webkitAudioContext)()
+ this.gainNode = this.audioCtx.createGain()
+ this.gainNode.gain.value = 1
+ this.gainNode.connect(this.audioCtx.destination)
+ this.startTime = this.audioCtx.currentTime
+}
+
+PCMPlayer.prototype.isTypedArray = function(data) {
+ return data.byteLength && data.buffer && data.buffer.constructor == ArrayBuffer
+}
+
+PCMPlayer.prototype.feed = function(data) {
+ if (!this.isTypedArray(data)) return
+ data = this.getFormatedValue(data)
+ var tmp = new Float32Array(this.samples.length + data.length)
+ tmp.set(this.samples, 0)
+ tmp.set(data, this.samples.length)
+ this.samples = tmp
+}
+
+PCMPlayer.prototype.getFormatedValue = function(data) {
+ var data = new this.typedArray(data.buffer),
+ float32 = new Float32Array(data.length),
+ i
+
+ for (i = 0; i < data.length; i++) {
+ float32[i] = data[i] / this.maxValue
+ }
+ return float32
+}
+
+PCMPlayer.prototype.volume = function(volume) {
+ this.gainNode.gain.value = volume
+}
+
+PCMPlayer.prototype.destroy = function() {
+ if (this.interval) {
+ clearInterval(this.interval)
+ }
+ this.samples = null
+ this.audioCtx.close()
+ this.audioCtx = null
+}
+
+PCMPlayer.prototype.flush = function() {
+ if (!this.samples.length) return
+ var bufferSource = this.audioCtx.createBufferSource(),
+ length = this.samples.length / this.option.channels,
+ audioBuffer = this.audioCtx.createBuffer(this.option.channels, length, this.option.sampleRate),
+ audioData,
+ channel,
+ offset,
+ i,
+ decrement
+
+ for (channel = 0; channel < this.option.channels; channel++) {
+ audioData = audioBuffer.getChannelData(channel)
+ offset = channel
+ decrement = 50
+ for (i = 0; i < length; i++) {
+ audioData[i] = this.samples[offset]
+ /* fadein */
+ if (i < 50) {
+ audioData[i] = (audioData[i] * i) / 50
+ }
+ /* fadeout*/
+ if (i >= length - 51) {
+ audioData[i] = (audioData[i] * decrement--) / 50
+ }
+ offset += this.option.channels
+ }
+ }
+
+ if (this.startTime < this.audioCtx.currentTime) {
+ this.startTime = this.audioCtx.currentTime
+ }
+ //console.log('start vs current '+this.startTime+' vs '+this.audioCtx.currentTime+' duration: '+audioBuffer.duration);
+ bufferSource.buffer = audioBuffer
+ bufferSource.connect(this.gainNode)
+ bufferSource.start(this.startTime)
+ this.startTime += audioBuffer.duration
+ this.samples = new Float32Array()
+}
+
+PCMPlayer.prototype.getTimestamp = function() {
+ if (this.audioCtx) {
+ return this.audioCtx.currentTime
+ } else {
+ return 0
+ }
+}
+
+PCMPlayer.prototype.play = function(data) {
+ if (!this.isTypedArray(data)) {
+ return
+ }
+
+ data = this.getFormatedValue(data)
+ if (!data.length) {
+ return
+ }
+
+ var bufferSource = this.audioCtx.createBufferSource(),
+ length = data.length / this.option.channels,
+ audioBuffer = this.audioCtx.createBuffer(this.option.channels, length, this.option.sampleRate),
+ audioData,
+ channel,
+ offset,
+ i,
+ decrement
+
+ for (channel = 0; channel < this.option.channels; channel++) {
+ audioData = audioBuffer.getChannelData(channel)
+ offset = channel
+ decrement = 50
+ for (i = 0; i < length; i++) {
+ audioData[i] = data[offset]
+ /* fadein */
+ if (i < 50) {
+ audioData[i] = (audioData[i] * i) / 50
+ }
+ /* fadeout*/
+ if (i >= length - 51) {
+ audioData[i] = (audioData[i] * decrement--) / 50
+ }
+ offset += this.option.channels
+ }
+ }
+
+ if (this.startTime < this.audioCtx.currentTime) {
+ this.startTime = this.audioCtx.currentTime
+ }
+ //console.log('start vs current '+this.startTime+' vs '+this.audioCtx.currentTime+' duration: '+audioBuffer.duration);
+ bufferSource.buffer = audioBuffer
+ bufferSource.connect(this.gainNode)
+ bufferSource.start(this.startTime)
+ this.startTime += audioBuffer.duration
+}
+
+PCMPlayer.prototype.pause = function() {
+ if (this.audioCtx.state === "running") {
+ this.audioCtx.suspend()
+ }
+}
+
+PCMPlayer.prototype.resume = function() {
+ if (this.audioCtx.state === "suspended") {
+ this.audioCtx.resume()
+ }
+}
--
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